Adding a draft for OpenSym 2017

Paulo Meireles
1 parent 42ecd373
Showing 21 changed files with 6713 additions and 0 deletions Show diff stats
opensym2017/.gitignore
opensym2017/Makefile
opensym2017/README.md
opensym2017/SIGCHI-Reference-Format.bst
opensym2017/acmcopyright.sty
opensym2017/content/00-abstract.tex
opensym2017/content/01-introduction.tex
opensym2017/content/02-spb.tex
opensym2017/content/03-arch.tex
opensym2017/content/04-features.tex
opensym2017/content/05-process.tex
opensym2017/content/06-ux.tex
opensym2017/content/07-finals.tex
opensym2017/figures/arch.png
opensym2017/figures/arch.svg
opensym2017/figures/arch2.png
opensym2017/figures/home-SPB.png
opensym2017/sigchi-ext.cls
opensym2017/sigchi.cls
opensym2017/spb.bib
@@ -0,0 +1,10 @@
+.DS_Store
+*.sw*
+guide.tex
+*.bak
+*.pdf
+*.aux
+*.log
+*.bbl
+*.blg
+*.out
@@ -0,0 +1,15 @@
+TARGET=spb
+
+all: $(TARGET).tex
+	pdflatex $(TARGET).tex
+	bibtex $(TARGET)
+	pdflatex $(TARGET).tex
+	pdflatex $(TARGET).tex
+	evince $(TARGET).pdf &
+
+edit:
+	gedit Makefile *.bib *.tex &
+
+clean:
+	rm -f $(TARGET).pdf *.out *.aux *.log *.blg *.bbl *.dvi *.ps *.toc *.lot *.lof *.idx *~
+
@@ -0,0 +1,3352 @@
+%%% -*-BibTeX-*-
+%%% ====================================================================
+%%%  @BibTeX-style-file{
+%%%     author          = "Nelson H. F. Beebe, Boris Veytsman and Gerald Murray",
+%%%     version         = "1.00",
+%%%     date            = "18 January 2012",
+%%%     time            = "11:48 EST",
+%%%     filename        = "ACM-Reference-Format-Journals.bst",
+%%%     address         = "University of Utah
+%%%                        Department of Mathematics, 110 LCB
+%%%                        155 S 1400 E RM 233
+%%%                        Salt Lake City, UT 84112-0090
+%%%                        USA",
+%%%     telephone       = "+1 801 581 5254",
+%%%     FAX             = "+1 801 581 4148",
+%%%     URL             = "http://www.math.utah.edu/~beebe",
+%%%     checksum        = "available here: http://www.acm.org/publications/latex_style/CRC-journals.txt"
+%%%     email           = "beebe@math.utah.edu, beebe@acm.org,
+%%%                        beebe@computer.org, borisv@lk.net, murray@hq.acm.org", 
+%%%     codetable       = "ISO/ASCII",
+%%%     keywords        = "ACM Transactions bibliography style; BibTeX",
+%%%     license         = "public domain",
+%%%     supported       = "yes",
+%%%     abstract        = "",
+%%%     docstring       = "The checksum field, above, is produced by WinMD5Free (v1.20) 
+%%%                        available from http://www.winmd5.com/?rid=winmd5,"
+%%%  }
+%%% ====================================================================
+
+% "SIGCHI Format" BibTeX style, Forked from ACM-Reference-Format-Journals.bst
+%  Modifications 13-FEBURARY-2015 (David Ayman Shamma)
+
+% "ACM Transactions" BibTeX style, ACM-Reference-Format-Journals.bst
+%  for BibTeX version 0.99c, LaTeX version 3.141
+%  ACM extensions with code cleaned up, extended, and debugged 10--15-Nov-2008
+%  Revised 17-APRIL-2008 (Nelson)
+%  Revised 13-MARCH-2011 (Boris/Gerry)
+%  Revised 23-MARCH-2011 (Boris/Gerry)
+%  Revised 27-MARCH-2011 (Boris/Gerry)
+%  Revised 15-APRIL-2011 (Boris/Gerry)
+%  Revised 27-SEPTEMBER-2011 (Boris)
+%
+%
+% History (by Nelson)
+%
+% Based on 'acmtrans' (for ACM Journals)
+% Date: 28th April 2008
+%
+% 1. Avoid 'repeating' the 'month' values.
+% 2. Avoid incorrectly italicizing the volume number.
+% 3. Avoid non italicizing certain titles (book, inproceedings etc).
+% 4. NO series if there is NO volume.
+% 5. Sorting of reference with first surname.
+% 6. Article no added for Inproceedings.
+%
+% Date: 07th May 2008
+%
+% 1. Abbreviation list added
+%
+%   Citation format: [author-last-name year]
+%             [author-last-name and author-last-name year]
+%             [author-last-name, author-last-name, and author-last-name year]
+%             [author-last-name et al. year]
+%             [author-last-name]
+%             author-last-name [year]
+%             [author-last-name and author-last-name]
+%             [author-last-name et al.]
+%             [year] or [year,year]
+%             year or year,year
+%
+%   Reference list ordering: alphabetical by author or whatever passes
+%    for author in the absence of one.
+%
+% Features of the old acmtrans.bst:
+% =================================
+%
+% - all authors appear last name first.
+% - all pages are listed xx-xx, (no pp.) and are at the end of the reference
+% - publishers are identified as publisher, address
+% - conferences papers (inproceedings) may give city of conference,
+%   date of conference, and journal that the proceedings appear in.
+% - months abbreviated to max four letters (eg. Mar.)
+% - volume of a series indicated after the title of the series
+% - editors appear after edited title and are identified by a trailing "Eds."
+%   not in parentheses.  Editor names are not given in small caps.
+%   (unless there is no author line)
+% - names terminated with a period even if there is no first name.
+% - editions are indicated trailing after the work, not in parentheses.
+% - "et al." citations have a protected period to avoid bad spacing (jrh)
+% - "address" required when publisher given
+% - series (roman) and volume are in a sentence separate from (book-)title
+%
+%
+% Features of chicago.bst:
+% =======================
+%
+% - full names used in citations, but abbreviated citations are available
+%   (see above)
+% - if an entry has a "month", then the month and year are also printed
+%   as part of that bibitem.
+% - all conjunctions use "and" instead of "\&"
+% - major modification from Chicago Manual of Style (13th ed.) is that
+%   only the first author in a reference appears last name first-
+%   additional authors appear as J. Q. Public.
+% - pages are listed as "pp. xx-xx" in all entry types except
+%   article entries.
+% - book, inbook, and manual use "location: publisher" (or organization)
+%   for address and publisher. All other types list publishers separately.
+% - "pp." are used to identify page numbers for all entry types except
+%   articles.
+% - organization is used as a citation label if neither author nor editor
+%   is present (for manuals).
+% - "et al." is used for long author and editor lists, or when "others"
+%   is used.
+%
+% Modifications and bug fixes from newapa.bst:
+% ===========================================
+%
+%   - added month, year to bib entries if month is present
+%   - fixed bug with In proceedings, added necessary comma after title
+%   - all conjunctions changed to "and" from "\&"
+%   - fixed bug with author labels in my.full.label: "et al." now is
+%        generated when "others" is an author name
+%   - major modification from Chicago Manual of Style (13th ed.) is that
+%     only the first author in a reference appears last name first-
+%     additional authors appear as J. Q. Public.
+%   - pages are listed as "pp. xx-xx" in all entry types except
+%     article entries. Unnecessary (IMHO) "()" around page numbers
+%     were removed, and page numbers now don't end with a period.
+%   - created chicago.sty for use with this bibstyle (required).
+%   - fixed bugs in FUNCTION {format.vol.num.pages} for missing volume,
+%     number, and /or pages. Renamed to format.journal.volume.number.
+%   - fixed bug in formatting booktitles: additional period an error if
+%     book has a volume.
+%   - fixed bug: editors usually given redundant period before next clause
+%     (format.editors.dot) removed.
+%   - added label support for organizations, if both author and editor
+%     are missing (from alpha.bst). If organization is too long, then
+%     the key field is used for abbreviated citations.
+%   - In proceedings or books of several volumes, no comma was written
+%     between the "Volume x" and the page numbers (this was intentional
+%     in newapa.bst). Fixed.
+%   - Some journals may not have volumes/numbers, only month/year (eg.
+%     IEEE Computer). Fixed bug in article style that assumed volume/number
+%     was always present.
+%
+% Original documentation for newapa.sty:
+% =====================================
+%
+% This version was made by modifying the master file made by
+% Oren Patashnik (PATASHNIK@SCORE.STANFORD.EDU), and the 'named' BibTeX
+% style of Peter F. Patel-Schneider.
+%
+% Copyright (C) 1985, all rights reserved.
+% Copying of this file is authorized only if either
+% (1) you make absolutely no changes to your copy, including name, or
+% (2) if you do make changes, you name it something other than 'newapa.bst'.
+% There are undoubtably bugs in this style.  If you make bug fixes,
+% improvements, etc.  please let me know.  My e-mail address is:
+%    spencer@cgrg.ohio.state.edu or 71160.3141@compuserve.com
+%
+% This style was made from 'plain.bst', 'named.bst', and 'apalike.bst',
+% with lots of tweaking to make it look like APA style, along with tips
+% from Young Ryu and Brian Reiser's modifications of 'apalike.bst'.
+%
+%
+% Start of ACM-Reference-Format-Journals.bst
+%
+% Note: Many of the new bibentry 'fields' will only work with the 
+% 'ACM-Reference-Format-Journals.bst' file. Legacy .bib files (which will, in all probability,
+% NOT contain these new fields) will _still_ work with the ACM-Reference-Format-Journals.bst.
+% 
+%
+ENTRY
+  { address
+    advisor
+    author
+    booktitle
+    chapter
+    city        % jtb: added
+    date        % jtb: added
+    edition
+    editor
+    howpublished
+    institution
+    journal
+    key
+    month
+    note
+    number
+    organization
+    pages
+    publisher
+    school
+    series
+    title
+    type
+    volume
+    year
+        % New keys recognized 
+        issue         % UTAH: used in, e.g., ACM SIGSAM Bulletin and ACM Communications in Computer Algebra
+        articleno
+        day           % UTAH: needed for newspapers, weeklies, bi-weeklies
+        doi           % UTAH
+        url           % UTAH
+        bookpages     % UTAH
+        numpages
+        lastaccessed  % UTAH: used only for @Misc{...}
+        coden         % UTAH
+        isbn          % UTAH
+        isbn-13       % UTAH
+        issn          % UTAH
+        lccn          % UTAH
+  }
+  {}
+  { label.year extra.label sort.year sort.label }
+
+INTEGERS { output.state before.all mid.sentence after.sentence after.block }
+
+INTEGERS { show-isbn-10-and-13 }  % initialized below in begin.bib
+
+INTEGERS { nameptr namesleft numnames }
+
+INTEGERS { multiresult }
+
+INTEGERS { len }
+
+INTEGERS { last.extra.num }
+
+STRINGS { s t t.org u }
+
+STRINGS { last.label next.extra }
+
+STRINGS { p1 p2 p3 page.count }
+
+FUNCTION { dump.stack.1 }
+{
+    duplicate$ "STACK[top] = [" swap$ * "]" * warning$
+}
+
+FUNCTION { dump.stack.2 }
+{
+    duplicate$ "STACK[top  ] = [" swap$ * "]" * warning$
+    swap$
+    duplicate$ "STACK[top-1] = [" swap$ * "]" * warning$
+    swap$
+}
+
+FUNCTION { empty.or.unknown }
+{
+  %% Examine the top stack entry, and push 1 if it is empty, or
+  %% consists only of whitespace, or is a string beginning with two
+  %% queries (??), and otherwise, push 0.
+  %%
+  %% This function provides a replacement for empty$, with the
+  %% convenient feature that unknown values marked by two leading
+  %% queries are treated the same as missing values, and thus, do not
+  %% appear in the output .bbl file, and yet, their presence in .bib
+  %% file(s) serves to mark values which are temporarily missing, but
+  %% are expected to be filled in eventually once more data is
+  %% obtained.  The TeX User Group and BibNet bibliography archives
+  %% make extensive use of this practice.
+  %%
+  %% An empty string cannot serve the same purpose, because just as in
+  %% statistics data processing, an unknown value is not the same as an
+  %% empty value.
+  %%
+  %% At entry: stack = ... top:[string]
+  %% At exit:  stack = ... top:[0 or 1]
+
+  duplicate$ empty$
+    { pop$ #1 }
+    { #1 #2 substring$ "??" = }
+  if$
+}
+
+FUNCTION { writeln }
+{
+  %% In BibTeX style files, the sequences
+  %%
+  %%     ... "one" "two" output
+  %%     ... "one" "two" output.xxx
+  %%
+  %% ship "one" to the output file, possibly following by punctuation,
+  %% leaving the stack with
+  %%
+  %%     ... "two"
+  %%
+  %% There is thus a one-string lag in output processing that must be
+  %% carefully handled to avoid duplicating a string in the output
+  %% file.  Unless otherwise noted, all output.xxx functions leave
+  %% just one new string on the stack, and that model should be born
+  %% in mind when reading or writing function code.
+  %%
+  %% BibTeX's asynchronous buffering of output from strings from the
+  %% stack is confusing because newline$ bypasses the buffer.  It
+  %% would have been so much easier for newline to be a character
+  %% rather than a state of the output-in-progress.
+  %%
+  %% The documentation in btxhak.dvi is WRONG:  it says
+  %%
+  %%    newline$ Writes onto the bbl file what's accumulated in the
+  %%             output buffer. It writes a blank line if and only
+  %%             if the output buffer is empty. Since write$ does
+  %%             reasonable line breaking, you should use this
+  %%             function only when you want a blank line or an
+  %%             explicit line break.
+  %%
+  %%    write$   Pops the top (string) literal and writes it on the
+  %%             output buffer (which will result in stuff being
+  %%             written onto the bbl file when the buffer fills
+  %%             up).
+  %%
+  %% Examination of the BibTeX source code shows that write$ does
+  %% indeed behave as claimed, but newline$ sends a newline character
+  %% directly to the output file, leaving the stack unchanged.  The
+  %% first line "Writes onto ... buffer." is therefore wrong.
+  %%
+  %% The original BibTeX style files almost always use "write$ newline$"
+  %% in that order, so it makes sense to hide that pair in a private
+  %% function like this one, named after a statement in Pascal,
+  %% the programming language embedded in the BibTeX Web program.
+
+  write$                % output top-of-stack string
+  newline$              % immediate write of newline (not via stack)
+}
+
+FUNCTION { init.state.consts }
+{
+  #0 'before.all :=
+  #1 'mid.sentence :=
+  #2 'after.sentence :=
+  #3 'after.block :=
+}
+
+FUNCTION { output.nonnull }
+{ % Stack in: ... R S T  Stack out: ... R T   File out: S<comma><space>
+  's :=
+  output.state mid.sentence =
+    {
+      ", " * write$
+    }
+    {
+      output.state after.block =
+        {
+          add.period$ writeln
+          "\newblock " write$
+        }
+        {
+          output.state before.all =
+            {
+              write$
+            }
+            {
+              add.period$ " " * write$
+            }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+
+FUNCTION { output.nonnull.dot.space }
+{ % Stack in: ... R S T  Stack out: ... R T   File out: S<dot><space>
+  's :=
+  output.state mid.sentence =           % { "<DEBUG output.nonnull.dot.space>. " * write$ }
+    {
+      ". " * write$
+    }
+    {
+      output.state after.block =
+        {
+          add.period$ writeln "\newblock " write$
+        }
+        {
+          output.state before.all =
+            {
+              write$
+            }
+            {
+              add.period$ " " * write$
+            }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+
+FUNCTION { output.nonnull.remove }
+{ % Stack in: ... R S T  Stack out: ... R T   File out: S<space>
+  's :=
+  output.state mid.sentence =
+    {
+      " " * write$
+    }
+    {
+      output.state after.block =
+        {
+          add.period$ writeln "\newblock " write$
+        }
+        {
+          output.state before.all =
+            {
+              write$
+            }
+            {
+              add.period$ " " * write$
+            }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+
+FUNCTION { output.nonnull.removenospace }
+{ % Stack in: ... R S T  Stack out: ... R T   File out: S
+  's :=
+  output.state mid.sentence =
+    {
+      "" * write$
+    }
+    {
+      output.state after.block =
+        {
+          add.period$ writeln "\newblock " write$
+        }
+        {
+          output.state before.all =
+            {
+              write$
+            }
+            {
+              add.period$ " " * write$
+            }
+          if$
+        }
+      if$
+      mid.sentence 'output.state :=
+    }
+  if$
+  s
+}
+
+FUNCTION { output }
+{ % discard top token if empty, else like output.nonnull
+  duplicate$ empty.or.unknown
+    'pop$
+    'output.nonnull
+  if$
+}
+
+FUNCTION { output.dot.space }
+{ % discard top token if empty, else like output.nonnull.dot.space
+  duplicate$ empty.or.unknown
+    'pop$
+    'output.nonnull.dot.space
+  if$
+}
+
+FUNCTION { output.removenospace }
+{ % discard top token if empty, else like output.nonnull.removenospace
+  duplicate$ empty.or.unknown
+    'pop$
+    'output.nonnull.removenospace
+  if$
+}
+
+FUNCTION { output.check }
+{ % like output, but warn if key name on top-of-stack is not set
+  't :=
+  duplicate$ empty.or.unknown
+    { pop$ "empty " t * " in " * cite$ * warning$ }
+    'output.nonnull
+  if$
+}
+
+FUNCTION { output.check.dot.space }
+{ % like output.dot.space, but warn if key name on top-of-stack is not set
+  't :=
+  duplicate$ empty.or.unknown
+    { pop$ "empty " t * " in " * cite$ * warning$ }
+    'output.nonnull.dot.space
+  if$
+}
+
+FUNCTION { fin.block }
+{ % functionally, but not logically, identical to fin.entry
+   add.period$
+   writeln
+}
+
+FUNCTION { fin.entry }
+{
+   add.period$
+   writeln
+}
+
+FUNCTION { new.sentence }
+{ % update sentence state, with neither output nor stack change
+  output.state after.block =
+    'skip$
+    {
+      output.state before.all =
+        'skip$
+        { after.sentence 'output.state := }
+      if$
+    }
+  if$
+}
+
+FUNCTION { fin.sentence }
+{
+   add.period$
+   write$
+   new.sentence
+   ""
+}
+
+FUNCTION { new.block }
+{
+  output.state before.all =
+    'skip$
+    { after.block 'output.state := }
+  if$
+}
+
+FUNCTION { output.coden }       % UTAH
+{ % output non-empty CODEN as one-line sentence (stack untouched)
+  coden empty.or.unknown
+    { }
+    { "\showCODEN{" coden * "}" * writeln }
+  if$
+}
+
+FUNCTION { format.articleno }
+{
+  articleno empty.or.unknown
+     { "" }
+     {
+        numpages empty.or.unknown
+          { "articleno field, but no numpages field, in " cite$ * warning$ }
+          { }
+        if$
+        "Article " articleno *
+     }
+  if$
+}
+
+FUNCTION { format.year }
+{ % push year string or "????" onto output stack
+  %% Because year is a mandatory field, we always force SOMETHING
+  %% to be output
+  year empty.or.unknown
+    { "????" }
+    { year }
+  if$
+}
+
+FUNCTION { format.day.month }
+{ % push "day month " or "month " or "" onto output stack
+  day empty.or.unknown
+    {
+      month empty.or.unknown
+        { "" }
+        { month " " *}
+      if$
+    }
+    {
+      month empty.or.unknown
+        { "" }
+        { day " " * month * " " *}
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.day.month.year }     % UTAH
+{ % if month is empty, push "" else push "(MON.)" or "(DD MON.)"
+  % Needed for frequent periodicals: 2008. ... New York Times C-1, C-2, C-17 (23 Oct.)
+  % acm-*.bst addition: prefix parenthesized date string with
+  % ", Article nnn "
+  articleno empty.or.unknown
+    { "" }
+    { ", " format.articleno * }
+  if$
+  " (" * format.day.month * format.year * ")" *
+}
+
+FUNCTION { output.day.month.year }     % UTAH
+{ % if month is empty value, do nothing; else output stack top and
+  % leave with new top string "(MON.)" or "(DD MON.)"
+  % Needed for frequent periodicals: 2008. ... New York Times C-1, C-2, C-17 (23 Oct.)
+  format.day.month.year
+  output.nonnull.remove
+}
+
+FUNCTION { strip.doi } % UTAH
+{ % Strip any Web address prefix to recover the bare DOI, leaving the
+  % result on the output stack, as recommended by CrossRef DOI
+  % documentation.
+  % For example, reduce "http://doi.acm.org/10.1145/1534530.1534545" to
+  % "10.1145/1534530.1534545".  That is later typeset and displayed as
+  % doi:10.1145/1534530.1534545 as the LAST item in the reference list
+  % entry.  Publisher Web sites wrap this with a suitable link to a real
+  % URL to resolve the DOI, and the master http://dx.doi.org/ address is
+  % preferred, since publisher-specific URLs can disappear in response
+  % to economic events.  All journals are encouraged by the DOI
+  % authorities to use that typeset format and link procedures for
+  % uniformity across all publications that include DOIs in reference
+  % lists.
+  % The numeric prefix is guaranteed to start with "10.", so we use
+  % that as a test.
+  doi #1 #3 substring$ "10." =
+    { doi }
+    {
+      doi #1 #7 substring$ "http://" =
+        {
+            doi #8 doi text.length$ #7 - substring$ 't := % get modifiable copy of rest of DOI
+
+            "INTERNAL STYLE-FILE ERROR" 's :=
+
+            % search for next "/" and assign its suffix to s
+
+            { t text.length$ }
+            {
+              t #1 #1 substring$ "/" =
+                {
+                  % save rest of string as true DOI (should be 10.xxxx/yyyy)
+                  t #2 t text.length$ #1 - substring$ 's :=
+                  "" 't :=    % empty string t terminates the loop
+                }
+                {
+                  % discard first character and continue loop: t <= substring(t,2,last)
+                  t #2 t text.length$ #1 - substring$ 't :=
+                }
+              if$
+            }
+            while$
+
+            % check for valid DOI (should be 10.xxxx/yyyy)
+            s #1 #3 substring$ "10." =
+              { }
+              { "unrecognized DOI substring " s * " in DOI value [" * doi * "]" * warning$ }
+            if$
+
+            s   % push the stripped DOI on the output stack
+
+        }
+        {
+          "unrecognized DOI value [" doi * "]" * warning$
+          doi   % push the unrecognized original DOI on the output stack
+        }
+      if$
+    }
+  if$
+}
+
+%
+% Change by BV: added standard prefix to URL
+%
+FUNCTION { output.doi } % UTAH
+{ % output non-empty DOI as one-line sentence (stack untouched)
+  doi empty.or.unknown
+    { }
+    {
+      %% NB: We want URLs at beginning of line to reduce likelihood of
+      %% BibTeX's nasty line wrapping after column 79, which then requires
+      %% manual (or automated) editing of the .bbl file to repair.
+      %% The \url{} macro strips percent-newlines, and is thus safe in
+      %% the presence of the line wrapping, but \path|...| and
+      %% \verb|...| do not.
+      "\showDOI{%" writeln
+      "\url{http://dx.doi.org/" strip.doi * "}}" * writeln
+    }
+  if$
+}
+
+FUNCTION { output.isbn }                % UTAH
+{ % output non-empty ISBN-10 and/or ISBN-13 as one-line sentences (stack untouched)
+  show-isbn-10-and-13
+    {
+      %% show both 10- and 13-digit ISBNs
+      isbn empty.or.unknown
+        { }
+        {
+          "\showISBNx{" isbn * "}" * writeln
+        }
+      if$
+      isbn-13 empty.or.unknown
+        { }
+        {
+          "\showISBNxiii{" isbn-13 * "}" * writeln
+        }
+      if$
+    }
+    {
+      %% show 10-digit ISBNs only if 13-digit ISBNs not available
+      isbn-13 empty.or.unknown
+        {
+          isbn empty.or.unknown
+            { }
+            {
+              "\showISBNx{" isbn * "}" * writeln
+            }
+          if$
+        }
+        {
+          "\showISBNxiii{" isbn-13 * "}" * writeln
+        }
+      if$
+    }
+  if$
+}
+
+FUNCTION { output.issn } % UTAH
+{ % output non-empty ISSN as one-line sentence (stack untouched)
+  issn empty.or.unknown
+    { }
+    { "\showISSN{" issn * "}" * writeln }
+  if$
+}
+
+FUNCTION { output.issue }
+{ % output non-empty issue number as a one-line sentence (stack untouched)
+  issue empty.or.unknown
+    { }
+    { "Issue " issue * "." * writeln }
+  if$
+}
+
+FUNCTION { output.lccn } % UTAH
+{ % return with stack untouched
+  lccn empty.or.unknown
+    { }
+    { "\showLCCN{" lccn * "}" * writeln }
+  if$
+}
+
+FUNCTION { output.note } % UTAH
+{ % return with stack empty
+  note empty.or.unknown
+    { }
+    { "\shownote{" note add.period$ * "}" * writeln }
+  if$
+}
+
+FUNCTION { output.note.check } % UTAH
+{ % return with stack empty
+  note empty.or.unknown
+    { "empty note in " cite$ * warning$ }
+    { "\shownote{" note add.period$ * "}" * writeln }
+  if$
+}
+
+%
+% Changes by BV 2011/04/15.  Do not output
+% url if doi is defined
+%
+FUNCTION { output.url } % UTAH
+{ % return with stack untouched
+  % output URL and associated lastaccessed fields
+  doi empty.or.unknown
+  {
+    url empty.or.unknown
+      { }
+      {
+          %% NB: We want URLs at beginning of line to reduce likelihood of
+          %% BibTeX's nasty line wrapping after column 79, which would require
+          %% manual (or automated) editing of the .bbl file to repair.  However,
+          %% the \url{} macro handles the unwrapping job automatically.
+          "\showURL{%" writeln
+          lastaccessed empty.or.unknown
+            { "" }
+            { "Retrieved " lastaccessed * " from " * }
+          if$
+
+          %% The URL field may contain a semicolon-separated list of Web
+          %% addresses, and we locate and wrap each of them in \url{...}.
+          %% The simplistic approach of putting the entire list into the
+          %% macro argument is that the semicolons are typeset in a
+          %% typewriter font, and no space follows them.
+          %%
+          %% We therefore replace the original code
+          %%    "\url{" * url * "}}" * writeln
+          %% with this character-at-a-time loop:
+
+          "\url{" *
+
+          url 't :=                       % get modifiable copy of URL list
+
+          { t text.length$ }
+          {
+            t #1 #1 substring$ ";" =
+              {                         % then split argument at separator
+                "};" * writeln
+                "\url{"
+              }
+              {                         % else concatenate nonblank character to argument
+                t #1 #1 substring$ " " =
+                  { }
+                  { t #1 #1 substring$ * }
+                if$
+              }
+            if$
+
+            t #2 t text.length$ #1 - substring$ 't :=
+          }
+          while$
+
+          "}}" * writeln
+      }
+    if$
+  }
+  { }
+  if$
+}
+
+FUNCTION { output.year.check }
+{ % warn if year empty, else output top string and leave " YEAR<label>" on stack in mid-sentence
+  year empty.or.unknown
+     { "empty year in " cite$ * warning$ }
+     { write$
+        " " year * extra.label *
+       mid.sentence 'output.state :=
+     }
+  if$
+}
+
+FUNCTION { not }
+{
+    { #0 }
+    { #1 }
+  if$
+}
+
+FUNCTION { and }
+{
+    'skip$
+    { pop$ #0 }
+  if$
+}
+
+FUNCTION { or }
+{
+   { pop$ #1 }
+    'skip$
+  if$
+}
+
+FUNCTION { le }
+{
+  %% test whether first number is less than or equal to second number
+  %% stack in:  n1 n2
+  %% stack out: if n1 <= n2 then 1 else 0
+
+  %% "DEBUG: le " cite$ * warning$
+  > { #0 } { #1 } if$
+}
+
+FUNCTION { ge }
+{
+  %% test whether first number is greater than or equal to second number
+  %% stack in:  n1 n2
+  %% stack out: if n1 >= n2 then 1 else 0
+
+  %% "DEBUG: ge " cite$ * warning$
+  < { #0 } { #1 } if$
+}
+
+FUNCTION { is.leading.digit }
+{
+  %% test whether first character of string is a digit
+  %% stack in:  string
+  %% stack out: if first-char-is-digit then 1 else 0
+
+  #1 #1 substring$                      % replace string by string[1:1]
+  duplicate$                            % string[1:1] string[1:1]
+  chr.to.int$
+  "0" chr.to.int$ swap$ le              % "0" <= string[1:1] --> 0-or-1
+  swap$                                 % 0-or-1 string[1:1]
+  chr.to.int$
+  "9" chr.to.int$ le                    % string[1:1} <= "9" --> 0-or-1
+  and
+}
+
+FUNCTION { skip.digits }
+{
+  %% skip over leading digits in string
+  %% stack in:  string
+  %% stack out: rest-of-string leading-digits
+
+  %% "DEBUG: enter skip.digits " cite$ * warning$
+
+  %% dump.stack.1
+
+  duplicate$
+  't :=
+  't.org :=
+  "" 'u :=
+
+  { t text.length$ }
+  {
+    %% "=================DEBUG: skip.digits   t = [" t * "]" * warning$
+    t is.leading.digit
+      { t #2 t text.length$ #1 - substring$ }
+      {
+        t 'u :=
+        ""
+      }
+    if$
+    't :=
+  }
+  while$
+
+  u                                                             % rest of string
+  t.org #1 t.org text.length$ u text.length$ - substring$       % leading digits
+
+  %% "DEBUG: t.org = [" t.org * "]" * warning$
+  %% "DEBUG: u     = [" u * "]" * warning$
+
+  %% dump.stack.2
+
+  %% "DEBUG: leave skip.digits " cite$ * warning$
+}
+
+FUNCTION { skip.nondigits }
+{
+  %% skip over leading nondigits in string
+  %% stack in:  string
+  %% stack out: rest-of-string
+
+  %% "DEBUG: enter skip.nondigits " cite$ * warning$
+
+  't :=
+  "" 'u :=
+
+  { t text.length$ }
+  {
+    %% "=================DEBUG: skip.nondigits   t = [" t * "]" * warning$
+    t is.leading.digit
+      {
+        t 'u :=
+        ""
+      }
+      { t #2 t text.length$ #1 - substring$ }
+    if$
+    't :=
+  }
+  while$
+
+  u                     % rest of string
+
+  %% dump.stack.1
+  %% "DEBUG: leave skip.nondigits " cite$ * warning$
+}
+
+FUNCTION { parse.next.number }
+{
+  %% stack in:  string
+  %% stack out: rest-of-string next-numeric-part-of-string
+  %% Example:
+  %% stack in:  "123:1--123:59"
+  %% stack out: ":1--123:59" "123"
+
+  's :=
+  s skip.nondigits 's :=
+  s skip.digits
+}
+
+FUNCTION { reduce.pages.to.page.count }
+{
+  %% Stack in:  arbitrary-and-unused
+  %% Stack out: unchanged
+  %%
+  %% For the new-style pagination with article number and numpages or
+  %% pages, we expect to have BibTeX entries containing something like
+  %%     articleno = "17",
+  %%     pages     = "1--23",
+  %% with output "Article 17, 23 pages",
+  %% or
+  %%     articleno = "17",
+  %%     numpages  = "23",
+  %% with output "Article 17, 23 pages",
+  %% or
+  %%     articleno = "17",
+  %%     pages     = "17:1--17:23",
+  %% with output "Article 17, 23 pages",
+  %%
+  %% If articleno is missing or empty, then we should output "1--23",
+  %% "23" (with a warning of a missing articleno), or "17:1--17:23",
+  %% respectively.
+
+  %% "DEBUG: enter reduce.pages.to.page.count " cite$ * warning$
+
+  %% "DEBUG: pages = [" pages * "]" * warning$
+
+  pages
+  parse.next.number 'p1 :=
+  parse.next.number 'p2 :=
+  parse.next.number 'p3 :=
+  parse.next.number 'page.count :=
+
+  duplicate$
+  empty.or.unknown
+    {  }
+    {
+      duplicate$ "unexpected trailing garbage [" swap$ *
+      "] after n:p1--n:p2 in pages = [" *
+      pages *
+      "] in " *
+      cite$ *
+      warning$
+    }
+  if$
+
+  pop$
+
+  %% "DEBUG: reduce.pages.to.page.count: "
+  %% " p1 = " p1 * *
+  %% " p2 = " p2 * *
+  %% " p3 = " p3 * *
+  %% " p4 = " page.count * *
+  %% " in " cite$ * * warning$
+
+  p1 p3 =   p2 "1" =   and   numpages empty.or.unknown   and
+    { "INFO: reduced pages = [" pages * "] to numpages = [" * page.count * "]" * warning$ }
+    {
+      numpages empty.or.unknown
+        { pages }
+        { numpages }
+      if$
+      'page.count :=
+    }
+  if$
+
+  p1 "1" =   p3 empty.or.unknown   and   numpages empty.or.unknown   and
+    {
+      p2 'page.count :=
+      "INFO: reduced pages = [" pages * "] to numpages = [" * page.count * "]" * warning$
+    }
+    {
+      numpages empty.or.unknown
+        { pages }
+        { numpages }
+      if$
+      'page.count :=
+    }
+  if$
+
+  %% "DEBUG: leave reduce.pages.to.page.count " cite$ * warning$
+}
+
+FUNCTION { new.block.checkb }
+{ % issue a new.block only if at least one of top two stack strings is not empty
+  empty.or.unknown
+  swap$ empty.or.unknown
+  and
+    'skip$
+    'new.block
+  if$
+}
+
+FUNCTION { field.or.null }
+{ % convert empty value to null string, else return value
+  duplicate$ empty.or.unknown
+    { pop$ "" }
+    'skip$
+  if$
+}
+
+FUNCTION { emphasize }
+{ % emphasize a non-empty top string on the stack (WITHOUT italic correction)
+  duplicate$ empty.or.unknown
+    { pop$ "" }
+    { "{\em " swap$ * "}" * }
+  if$
+}
+
+FUNCTION { emphasize.with.italic.correction }
+{ % convert empty string to null string, or emphasize with a trailing italic correction
+  duplicate$ empty.or.unknown
+    { pop$ "" }
+    { "{\em " swap$ * "\/}" * }
+  if$
+}
+
+FUNCTION { comma }
+{ % convert empty string to null string, or brace string and add trailing comma
+  duplicate$ empty.or.unknown
+    { pop$ "" }
+    { "{" swap$ * "}," * }
+  if$
+}
+
+FUNCTION { format.names }
+{
+  % Format bibliographical entries with the first author last name first,
+  % and subsequent authors with initials followed by last name.
+  % All names are formatted in this routine.
+
+  's :=
+  #1 'nameptr :=               % nameptr = 1;
+  s num.names$ 'numnames :=    % numnames = num.name$(s);
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 =
+        %NO: BAD ORDER: {"{" s nameptr "{ff~}{ll}{, jj}{, vv}" format.name$ * "}" * 't := }
+        %NO: BAD ORDER: {"{" s nameptr "{ff~}{ll}{, jj}{, vv}" format.name$ * "}" * 't := }
+        {"{" s nameptr "{ff }{vv }{ll}{, jj}" format.name$ * "}" * 't := }
+        {"{" s nameptr "{ff }{vv }{ll}{, jj}" format.name$ * "}" * 't := }
+      if$
+      nameptr #1 >
+        {
+          namesleft #1 >
+            { ", " * t * }
+            {
+              numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "{\sc others}" =
+                { " {et~al\mbox{.}}" * } % jrh: avoid spacing problems
+                { " {and} " * t * } % from Chicago Manual of Style
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=          % nameptr += 1;
+      namesleft #1 - 'namesleft :=      % namesleft =- 1;
+    }
+  while$
+}
+
+FUNCTION { my.full.label }
+{
+  's :=
+  #1 'nameptr :=               % nameptr = 1;
+  s num.names$ 'numnames :=    % numnames = num.name$(s);
+  numnames 'namesleft :=
+    { namesleft #0 > }
+
+    { s nameptr "{vv~}{ll}" format.name$ 't :=  % get the next name
+      nameptr #1 >
+        {
+          namesleft #1 >
+            { ", " * t * }
+            {
+              numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "others" =
+                { " et~al\mbox{.}" * } % jrh: avoid spacing problems
+                { " and " * t * } % from Chicago Manual of Style
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=          % nameptr += 1;
+      namesleft #1 - 'namesleft :=      % namesleft =- 1;
+    }
+  while$
+
+}
+
+FUNCTION { format.names.fml }
+{
+  % Format names in "familiar" format, with first initial followed by
+  % last name. Like format.names, ALL names are formatted.
+  % jtb: The names are NOT put in small caps
+
+  's :=
+  #1 'nameptr :=               % nameptr = 1;
+  s num.names$ 'numnames :=    % numnames = num.name$(s);
+  numnames 'namesleft :=
+    { namesleft #0 > }
+
+    {
+      "{" s nameptr "{ff~}{vv~}{ll}{, jj}" format.name$ * "}" * 't :=
+
+      nameptr #1 >
+        {
+          namesleft #1 >
+            { ", " * t * }
+            {
+              numnames #2 >
+                { "," * }
+                'skip$
+              if$
+              t "{others}" =
+                { " {et~al\mbox{.}}" * }
+                { " {and} " * t * }
+              if$
+            }
+          if$
+        }
+        't
+      if$
+      nameptr #1 + 'nameptr :=          % nameptr += 1;
+      namesleft #1 - 'namesleft :=      % namesleft =- 1;
+    }
+  while$
+}
+
+FUNCTION { format.authors }
+{
+  author empty.or.unknown
+    { "" }
+    { author format.names add.period$} % jtb: add period if none before
+  if$
+}
+
+FUNCTION { format.key }
+{
+  empty.or.unknown
+    { key field.or.null }
+    { "" }
+  if$
+}
+
+FUNCTION { format.no.key }
+{
+  empty.or.unknown
+    { "" }
+    { "" }
+  if$
+}
+
+FUNCTION { format.editors.fml }
+{
+  % Format editor names for use in the "in" types: inbook, incollection,
+  % inproceedings: first initial, then last names. When editors are the
+  % LABEL for an entry, then format.editor is used which lists editors
+  % by last name first.
+
+  editor empty.or.unknown
+    { "" }
+    {
+      editor format.names.fml editor num.names$ #1 >
+        { " (Eds.)" * }
+        { " (Ed.)" * }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.editors }
+{ % format editor names for use in labels, last names first.
+  editor empty.or.unknown
+    { "" }
+    {
+      editor format.names
+      editor num.names$ #1 >
+        { " (Eds.)." * }
+        { " (Ed.)." * }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.articletitle }
+{
+  title empty.or.unknown
+    { "" }
+    % Use this to preserve lettercase in titles:
+    { "\showarticletitle{" title * "}" * }
+    % Use this for downcase title style:
+    % { \showarticletitle{" title "t" change.case$ * "}" * }
+  if$
+}
+
+FUNCTION { format.title }
+{
+  title empty.or.unknown
+    { "" }
+    % Use this to preserve lettercase in titles:
+    { title }
+    % Use this for downcase title style:
+    % { title "t" change.case$ }
+  if$
+}
+
+FUNCTION { n.dashify }
+{
+  't :=
+  ""
+    { t empty.or.unknown not }
+    {
+      t #1 #1 substring$ "-" =
+        {
+          t #1 #2 substring$ "--" = not
+            { "--" *
+              t #2 global.max$ substring$ 't :=
+            }
+            {
+              { t #1 #1 substring$ "-" = }
+              {
+                "-" *
+                t #2 global.max$ substring$ 't :=
+              }
+              while$
+            }
+          if$
+        }
+        {
+          t #1 #1 substring$ *
+          t #2 global.max$ substring$ 't :=
+        }
+      if$
+    }
+  while$
+}
+
+FUNCTION { format.btitle }
+{
+  edition empty.or.unknown
+  { title emphasize }
+  { title empty.or.unknown
+    { title emphasize } % jtb: what is this supposed to do ?!?
+    { "{\em " title * "\/} (" * edition "l" change.case$ * " ed.)" * } % jtb: no parens for ed.
+    if$
+  }
+  if$
+}
+
+FUNCTION { format.emphasize.booktitle }
+{ % push "" or "{\em booktitle}" or "{\em booktitle}, (second ed.)" on stack
+  edition empty.or.unknown
+    { booktitle emphasize }
+    { booktitle empty.or.unknown
+      { "" }
+      { "{\em " booktitle * "} (" * edition "l" change.case$ * " ed.)" * }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.city }
+{
+  % jtb: if the preceding string (the title of the conference) is non-empty,
+  % jtb: append the location, otherwise leave empty (so as to trigger the
+  % jtb: error message in output.check
+
+  duplicate$ empty.or.unknown
+    { }
+    {
+      city empty.or.unknown
+        {
+          date empty.or.unknown
+            { }
+            { " (" * date * ")" * }
+          if$
+        }
+        {
+          date empty.or.unknown
+            { " (" * city * ")" * }
+            { " (" * city * ", " * date * ")" * }
+          if$
+        }
+      if$
+    }
+  if$
+}
+
+FUNCTION { tie.or.space.connect }
+{
+  duplicate$ text.length$ #3 <
+    { "~" }
+    { " " }
+  if$
+  swap$ * *
+}
+
+FUNCTION { either.or.check }
+{
+  empty.or.unknown
+    'pop$
+    { "can't use both " swap$ * " fields in " * cite$ * warning$ }
+  if$
+}
+
+FUNCTION { format.bvolume }
+{
+  % jtb: If there is a series, this is added and the volume trails after it.
+  % jtb: Otherwise, "Vol" is Capitalized.
+
+  volume empty.or.unknown
+    { "" }
+    {
+      series empty.or.unknown
+        { "Vol." volume tie.or.space.connect}
+        { series ", " * "Vol." volume tie.or.space.connect *}
+      if$
+      "volume and number" number either.or.check
+    }
+  if$
+}
+
+FUNCTION { format.bvolume.noseries }
+{
+  volume empty.or.unknown
+    { "" }
+    {
+      series empty.or.unknown
+        { "Vol." volume tie.or.space.connect}
+        { "Vol." volume tie.or.space.connect}
+%        { series ", " * "Vol." volume tie.or.space.connect *}
+      if$
+      "volume and number" number either.or.check
+    }
+  if$
+}
+
+FUNCTION { format.series }
+{
+  series empty.or.unknown
+    {""}
+    {" {\em (" * series ")}" *}
+  if$
+}
+
+FUNCTION { format.number.series }
+{
+  volume empty.or.unknown
+    {
+      number empty.or.unknown
+        {
+          volume empty.or.unknown
+          { "" }
+          {
+            series empty.or.unknown
+              { "" }
+              { " (" series * ")" * }
+            if$
+          }
+          if$
+        }                                       %    { series field.or.null }
+        {
+          output.state mid.sentence =
+            { "Number" }                        % gnp - changed to mixed case always
+            { "Number" }
+          if$
+          number tie.or.space.connect series empty.or.unknown
+            { "there's a number but no series in " cite$ * warning$ }
+            { " in " * series * }
+          if$
+        }
+      if$
+    }
+    {
+      ""
+    }
+  if$
+}
+
+FUNCTION { multi.page.check }
+{
+  't :=
+  #0 'multiresult :=
+    { multiresult not
+      t empty.or.unknown not
+      and
+    }
+    { t #1 #1 substring$
+      duplicate$ "-" =
+      swap$ duplicate$ "," =
+      swap$ "+" =
+      or or
+    { #1 'multiresult := }
+    { t #2 global.max$ substring$ 't := }
+      if$
+    }
+  while$
+  multiresult
+}
+
+FUNCTION { format.pages }
+{
+  pages empty.or.unknown
+    { "" }
+    {
+      pages multi.page.check
+        { pages n.dashify } % gnp - removed () % jtb: removed pp.
+        { pages }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.pages.check.without.articleno }
+{ %% format pages field only if articleno is absent
+  %% Stack out: pages-specification
+  numpages missing$ pages missing$ and
+    { "page numbers missing in both pages and numpages fields in " cite$ * warning$ }
+    { }
+  if$
+
+  articleno empty.or.unknown
+    {
+      pages missing$
+        { numpages }
+        { format.pages }
+      if$
+    }
+    { "" }
+  if$
+}
+
+FUNCTION { format.pages.check }
+{
+  pages empty.or.unknown
+    { "page numbers missing in " cite$ * warning$ "" }
+    { pages n.dashify }
+  if$
+}
+
+FUNCTION { format.bookpages }
+{
+  bookpages empty.or.unknown
+    { "" }
+    { bookpages "book pages" tie.or.space.connect }
+  if$
+}
+
+FUNCTION { format.named.pages }
+{
+  pages empty.or.unknown
+    { "" }
+    { format.pages "pages" tie.or.space.connect }
+  if$
+}
+
+%
+% Changed by Boris Veytsman, 2011-03-13
+% Now the word "pages" is printed even if
+% there field pages is not empty.
+%
+
+FUNCTION { format.page.count }
+{
+  page.count empty.or.unknown
+    { "" }
+    {
+      articleno empty.or.unknown
+        { "numpages field, but no articleno field, in " cite$ * warning$ }
+        { }
+      if$
+      page.count "pages" tie.or.space.connect
+    }
+  if$
+}
+
+FUNCTION { format.articleno.numpages }
+{
+  %% There are seven possible outputs, depending on which fields are set.
+  %%
+  %% These four are handled here:
+  %%
+  %%     articleno, numpages, pages     -> "Article articleno-value, numpages-value pages"
+  %%     articleno, numpages            -> "Article articleno-value, numpages-value pages"
+  %%     articleno, pages               -> "Article articleno-value, reduced-pages-value pages"
+  %%     articleno                      -> "Article articleno-value" and warn about missing numpages
+  %%
+  %% The remaining three have already been handled by
+  %% format.pages.check.without.articleno:
+  %%
+  %%     numpages, pages                -> "pages-value"
+  %%     numpages                       -> "numpages-value"
+  %%     pages                          -> "pages-value"
+
+  articleno empty.or.unknown
+    {
+      numpages empty.or.unknown
+        { }
+        { "require articleno with numpages field in " cite$ * warning$ }
+      if$
+      ""
+    }
+    {
+      numpages empty.or.unknown
+        {
+          pages empty.or.unknown
+            {
+              "require pages or numpages fields with articleno field in " cite$ * warning$
+              "" 'page.count :=
+            }
+            { reduce.pages.to.page.count }
+          if$
+        }
+        { numpages 'page.count := }
+      if$
+
+      %% The Article number is now handled in format.day.month.year because
+      %% ACM prefers the style "Digital Libraries 12, 3, Article 5 (July 2008)"
+      %% over "Digital Libraries 12, 3 (July 2008), Article 5"
+      %% format.articleno output
+      format.page.count
+    }
+  if$
+}
+
+FUNCTION { format.journal.volume.number.day.month.year }
+{
+  % By Young (and Spencer)
+  % GNP - fixed bugs with missing volume, number, and/or pages
+  %
+  % Format journal, volume, number, pages for article types.
+  %
+  journal empty.or.unknown
+    { "no journal in " cite$ * warning$
+      "" }
+%    { journal emphasize.with.italic.correction }
+     {
+           journal "Journal of the ACM" =
+       { "{\it J. ACM}" }
+       {
+           journal "American Mathematical Society Translations" =
+       { "{\it Amer. Math. Soc. Transl.}" }
+       {
+           journal "Bulletin of the American Mathematical Society" =
+       { "{\it Bull. Amer. Math. Soc.}" }
+       {
+           journal "Proceedings of the American Mathematical Society" =
+       { "{\it Proc. Amer. Math. Soc.}" }
+       {
+           journal "Transactions of the American Mathematical Society" =
+       { "{\it Trans. Amer. Math. Soc.}" }
+       {
+           journal "Communications of the {ACM}" =
+       { "{\it Commun. {ACM}}" }
+       {
+           journal "{ACM} Computing Surveys" =
+       { "{\it Comput. Surveys}" }
+       {
+           journal "{ACM} Transactions on Mathematical Software" =
+       { "{\it {ACM} Trans. Math. Software}" }
+       {
+           journal "{ACM} {SIGNUM} Newsletter" =
+       { "{\it {ACM} {SIGNUM} Newslett.}" }
+       {
+           journal "American Journal of Sociology" =
+       { "{\it Amer. J. Sociology}" }
+       {
+           journal "Journal of the American Statistical Association" =
+       { "{\it J. Amer. Statist. Assoc.}" }
+       {
+           journal "Applied Mathematics and Computation" =
+       { "{\it Appl. Math. Comput.}" }
+       {
+           journal "American Mathematical Monthly" =
+       { "{\it Amer. Math. Monthly}" }
+       {
+           journal "British Journal of Mathematical and Statistical Psychology" =
+       { "{\it Brit. J. Math. Statist. Psych.}" }
+       {
+           journal "Canadian Mathematical Bulletin" =
+       { "{\it Canad. Math. Bull.}" }
+       {
+           journal "Journal of Computational and Applied Mathematics" =
+       { "{\it J. Comput. Appl. Math.}" }
+       {
+           journal "Journal of Computational Physics" =
+       { "{\it J. Comput. Phys.}" }
+       {
+           journal "Computers and Structures" =
+       { "{\it Comput. \& Structures}" }
+       {
+           journal "The Computer Journal" =
+       { "{\it Comput. J.}" }
+       {
+           journal "Journal of Computer and System Sciences" =
+       { "{\it J. Comput. System Sci.}" }
+       {
+           journal "Contemporary Mathematics" =
+       { "{\it Contemp. Math.}" }
+       {
+           journal "Crelle's Journal" =
+       { "{\it Crelle's J.}" }
+       {
+           journal "Giornale di Mathematiche" =
+       { "{\it Giorn. Mat.}" }
+       {
+           journal "{IEEE} Transactions on Computers" =
+       { "{\it {IEEE} Trans. Comput.}" }
+       {
+           journal "{IEEE} Transactions on Automatic Control" =
+       { "{\it {IEEE} Trans. Automat. Control}" }
+       {
+           journal "Proceedings of the {IEEE}" =
+       { "{\it Proc. {IEEE}}" }
+       {
+           journal "{IEEE} Transactions on Aerospace and Electronic Systems" =
+       { "{\it {IEEE} Trans. Aerospace Electron. Systems}" }
+       {
+           journal "{IMA} Journal of Numerical Analysis" =
+       { "{\it {IMA} J. Numer. Anal.}" }
+       {
+           journal "Information Processing Letters" =
+       { "{\it Inform. Process. Lett.}" }
+       {
+           journal "Journal of the Institute of Mathematics and its Applications" =
+       { "{\it J. Inst. Math. Appl.}" }
+       {
+           journal "International Journal of Control" =
+       { "{\it Internat. J. Control}" }
+       {
+           journal "International Journal for Numerical Methods in Engineering" =
+       { "{\it Internat. J. Numer. Methods Engrg.}" }
+       {
+           journal "International Journal of Supercomputing Applications" =
+       { "{\it Internat. J. Supercomputing Applic.}" }
+       {
+           journal "Journal of Research of the National Bureau of Standards" =
+       { "{\it J. Res. Nat. Bur. Standards}" }
+       {
+           journal "Linear Algebra and its Applications" =
+       { "{\it Linear Algebra Appl.}" }
+       {
+           journal "Journal of Mathematical Analysis and Applications" =
+       { "{\it J. Math. Anal. Appl.}" }
+       {
+           journal "Mathematische Annalen" =
+       { "{\it Math. Ann.}" }
+       {
+           journal "Journal of Mathematical Physics" =
+       { "{\it J. Math. Phys.}" }
+       {
+           journal "Mathematics of Computation" =
+       { "{\it Math. Comp.}" }
+       {
+           journal "Mathematica Scandinavica" =
+       { "{\it Math. Scand.}" }
+       {
+           journal "Mathematical Tables and Other Aids to Computation" =
+       { "{\it Math. Tables Aids Comput.}" }
+       {
+           journal "Numerische Mathematik" =
+       { "{\it Numer. Math.}" }
+       {
+           journal "Pacific Journal of Mathematics" =
+       { "{\it Pacific J. Math.}" }
+       {
+           journal "Journal of Parallel and Distributed Computing" =
+       { "{\it J. Parallel and Distrib. Comput.}" }
+       {
+           journal "Parallel Computing" =
+       { "{\it Parallel Comput.}" }
+       {
+           journal "Philosophical Magazine" =
+       { "{\it Philos. Mag.}" }
+       {
+           journal "Proceedings of the National Academy of Sciences of the USA" =
+       { "{\it Proc. Nat. Acad. Sci. U. S. A.}" }
+       {
+           journal "Quarterly Journal of Mathematics, Oxford, Series (2)" =
+       { "{\it Quart. J. Math. Oxford Ser. (2)}" }
+       {
+           journal "Quarterly of Applied Mathematics" =
+       { "{\it Quart. Appl. Math.}" }
+       {
+           journal "Review of the International Statisical Institute" =
+       { "{\it Rev. Inst. Internat. Statist.}" }
+       {
+           journal "Journal of the Society for Industrial and Applied Mathematics" =
+       { "{\it J. Soc. Indust. Appl. Math.}" }
+       {
+           journal "Journal of the Society for Industrial and Applied Mathematics, Series B, Numerical Analysis" =
+       { "{\it J. Soc. Indust. Appl. Math. Ser. B Numer. Anal.}" }
+       {
+           journal "{SIAM} Journal on Algebraic and Discrete Methods" =
+       { "{\it {SIAM} J. Algebraic Discrete Methods}" }
+       {
+           journal "{SIAM} Journal on Applied Mathematics" =
+       { "{\it {SIAM} J. Appl. Math.}" }
+       {
+           journal "{SIAM} Journal on Computing" =
+       { "{\it {SIAM} J. Comput.}" }
+       {
+           journal "{SIAM} Journal on Matrix Analysis and Applications" =
+       { "{\it {SIAM} J. Matrix Anal. Appl.}" }
+       {
+           journal "{SIAM} Journal on Numerical Analysis" =
+       { "{\it {SIAM} J. Numer. Anal.}" }
+       {
+           journal "{SIAM} Review" =
+       { "{\it {SIAM} Rev.}" }
+       {
+           journal "{SIAM} Journal on Scientific and Statistical Computing" =
+       { "{\it {SIAM} J. Sci. Statist. Comput.}" }
+       {
+           journal "Software Practice and Experience" =
+       { "{\it Software Prac. Experience}" }
+       {
+           journal "Statistical Science" =
+       { "{\it Statist. Sci.}" }
+       {
+           journal "{USSR} Computational Mathematics and Mathematical Physics" =
+       { "{\it {U. S. S. R.} Comput. Math. and Math. Phys.}" }
+       {
+           journal "Journal of {VLSI} and Computer Systems" =
+       { "{\it J. {VLSI} Comput. Syst.}" }
+       {
+           journal "Zeitschrift fur Angewandte Mathematik und Mechanik" =
+       { "{\it Z. Angew. Math. Mech.}" }
+       {
+           journal "Zeitschrift fur Angewandte Mathematik und Physik" =
+       { "{\it Z. Angew. Math. Phys.}" }
+       {
+           journal "ACM Computing Surveys" =
+       { "{\it Comput. Surveys}" }
+       {
+           journal "ACM Transactions on Mathematical Software" =
+       { "{\it ACM Trans. Math. Software}" }
+       {
+           journal "ACM {SIGNUM} Newsletter" =
+       { "{\it ACM {SIGNUM} Newslett.}" }
+       {
+           journal "IEEE Transactions on Computers" =
+       { "{\it IEEE Trans. Comput.}" }
+       {
+           journal "IEEE Transactions on Automatic Control" =
+       { "{\it IEEE Trans. Automat. Control}" }
+       {
+           journal "Proceedings of the IEEE" =
+       { "{\it Proc. IEEE}" }
+       {
+           journal "IEEE Transactions on Aerospace and Electronic Systems" =
+       { "{\it IEEE Trans. Aerospace Electron. Systems}" }
+       {
+           journal "IMA Journal of Numerical Analysis" =
+       { "{\it IMA J. Numer. Anal.}" }
+       {
+           journal "SIAM Journal on Algebraic and Discrete Methods" =
+       { "{\it SIAM J. Algebraic Discrete Methods}" }
+       {
+           journal "SIAM Journal on Applied Mathematics" =
+       { "{\it SIAM J. Appl. Math.}" }
+       {
+           journal "SIAM Journal on Computing" =
+       { "{\it SIAM J. Comput.}" }
+       {
+           journal "SIAM Journal on Matrix Analysis and Applications" =
+       { "{\it SIAM J. Matrix Anal. Appl.}" }
+       {
+           journal "SIAM Journal on Numerical Analysis" =
+       { "{\it SIAM J. Numer. Anal.}" }
+       {
+           journal "SIAM Review" =
+       { "{\it SIAM Rev.}" }
+       {
+           journal "SIAM Journal on Scientific and Statistical Computing" =
+       { "{\it SIAM J. Sci. Statist. Comput.}" }
+       {
+           journal "USSR Computational Mathematics and Mathematical Physics" =
+       { "{\it U. S. S. R. Comput. Math. and Math. Phys.}" }
+       {
+           journal "Journal of VLSI and Computer Systems" =
+       { "{\it J. VLSI Comput. Syst.}" }
+       {
+           journal "Communications of the ACM" =
+       { "{\it Commun. ACM}" }
+       %% If no match with cases needing special handling, just output journal name
+       {  journal emphasize.with.italic.correction  }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+           }
+     if$
+         }
+    if$
+
+  number empty.or.unknown
+    {
+      volume empty.or.unknown
+        { "no number and no volume in " cite$ * warning$ "" * }
+        { " " * " {" * volume * "}" * }
+      if$
+    }
+    {
+      volume empty.or.unknown
+        {
+          "unusual to have number, but no volume, for " cite$ * warning$
+          " " * number *
+        }
+        { " " * volume comma " " * number * * }
+      if$
+    }
+  if$
+
+  format.day.month.year *
+}
+
+FUNCTION { format.chapter.pages }
+{
+  chapter empty.or.unknown
+    'format.pages
+    { type empty.or.unknown
+        { "Chapter" } % gnp - changed to mixed case
+        { type "t" change.case$ }
+      if$
+      chapter tie.or.space.connect
+      pages empty.or.unknown
+        {"page numbers missing in " cite$ * warning$} % gnp - added check
+        { ", " * format.pages * }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.in.emphasize.booktitle }
+{ % jtb: format for collections or proceedings not appearing in a journal
+  booktitle empty.or.unknown
+  { "" }
+  { "In " format.emphasize.booktitle * }
+  if$
+}
+
+FUNCTION { format.in.booktitle }
+{ % jtb: format for proceedings appearing in a journal
+  booktitle empty.or.unknown
+  { "" }
+  { "In " booktitle * }
+  if$
+}
+
+FUNCTION { format.in.ed.booktitle }
+{
+  booktitle empty.or.unknown
+  { "" }
+  { editor empty.or.unknown
+    { "In " format.emphasize.booktitle * }
+                % jtb: swapped editor location
+    { "In " format.emphasize.booktitle * ", " * format.editors.fml * }
+    if$
+  }
+  if$
+}
+
+FUNCTION { format.thesis.type }
+{ % call with default type on stack top
+  type empty.or.unknown
+    'skip$    % use default type
+    {
+      pop$    % discard default type
+      % NO: it is silly to have to brace protect every degree type!:  type "t" change.case$
+      type
+    }
+  if$
+}
+
+FUNCTION { format.tr.number }
+{
+  type empty.or.unknown
+%    { "Tech. Rep." }     
+    { "{T}echnical {R}eport" }     % ACM wants it explicit (Gerry 9/28)
+    'type
+  if$
+  number empty.or.unknown
+    { "t" change.case$ }
+    %% LOOKS BAD: { "." * number tie.or.space.connect }
+    %% Prefer "Research report RJ687." to "Research report. RJ687."
+    { number tie.or.space.connect }
+  if$
+}
+
+FUNCTION { format.advisor }
+{
+  advisor empty.or.unknown
+    { "" }
+    { "Advisor(s) " advisor * }
+  if$
+}
+
+FUNCTION { format.article.crossref }
+{ "See"
+  "\citeN{" * crossref * "}" *
+}
+
+FUNCTION { format.crossref.editor }
+{
+  editor #1 "{vv~}{ll}" format.name$
+  editor num.names$ duplicate$
+  #2 >
+    { pop$ " et~al\mbox{.}" * }         % jrh: avoid spacing problems
+    { #2 <
+    'skip$
+    { editor #2 "{ff }{vv }{ll}{ jj}" format.name$ "others" =
+        { " et~al\mbox{.}" * }          % jrh: avoid spacing problems
+        { " and " * editor #2 "{vv~}{ll}" format.name$ * }
+      if$
+    }
+      if$
+    }
+  if$
+}
+
+FUNCTION { format.book.crossref }
+{
+  volume empty.or.unknown
+    { "empty volume in " cite$ * "'s crossref of " * crossref * warning$
+      "In "
+    }
+    { "Volume" volume tie.or.space.connect % gnp - changed to mixed case
+      " of " *
+    }
+  if$
+  editor empty.or.unknown
+  editor field.or.null author field.or.null =
+  or
+    { key empty.or.unknown
+    { series empty.or.unknown
+        { "need editor, key, or series for " cite$ * " to crossref " *
+          crossref * warning$
+          "" *
+        }
+        { "{\em " * series * "\/}" * }
+      if$
+    }
+    { key * }
+      if$
+    }
+    { format.crossref.editor * }
+  if$
+  " \citeN{" * crossref * "}" *
+}
+
+FUNCTION { format.incoll.inproc.crossref }
+{ "See"
+  " \citeN{" * crossref * "}" *
+}
+
+FUNCTION { format.lab.names }
+{
+  % format.lab.names:
+  %
+  % determines "short" names for the abbreviated author information.
+  % "Long" labels are created in calc.label, using the routine my.full.label
+  % to format author and editor fields.
+  %
+  % There are 4 cases for labels.   (n=3 in the example)
+  % a) one author             Foo
+  % b) one to n               Foo, Bar and Baz
+  % c) use of "and others"    Foo, Bar et al.
+  % d) more than n            Foo et al.
+
+  's :=
+  s num.names$ 'numnames :=
+  numnames #2 >    % change number to number of others allowed before
+                   % forcing "et al".
+    { s #1 "{vv~}{ll}" format.name$ " et~al\mbox{.}" * } % jrh: \mbox{} added
+    {
+      numnames #1 - 'namesleft :=
+      #2 'nameptr :=
+      s #1 "{vv~}{ll}" format.name$
+        { namesleft #0 > }
+        { nameptr numnames =
+            { s nameptr "{ff }{vv }{ll}{ jj}" format.name$ "others" =
+                { " et~al\mbox{.}" * }          % jrh: avoid spacing problems
+                { " and " * s nameptr "{vv~}{ll}" format.name$ * }
+              if$
+            }
+            { ", " * s nameptr "{vv~}{ll}" format.name$ * }
+          if$
+          nameptr #1 + 'nameptr :=
+          namesleft #1 - 'namesleft :=
+        }
+      while$
+    }
+  if$
+}
+
+FUNCTION { author.key.label }
+{
+  author empty.or.unknown
+    { key empty.or.unknown
+          { "no key, author in " cite$ * warning$
+            cite$ #1 #3 substring$ }
+         'key
+      if$
+    }
+    { author format.lab.names }
+  if$
+}
+
+FUNCTION { author.key.organization.label }
+{ % added - gnp. Provide label formatting by organization if author is null.
+  author empty.or.unknown
+    { organization empty.or.unknown
+        { key empty.or.unknown
+            { "no key, author or organization in " cite$ * warning$
+              cite$ #1 #3 substring$ }
+            'key
+          if$
+        }
+        { organization }
+      if$
+    }
+    { author format.lab.names }
+  if$
+}
+
+FUNCTION { editor.key.organization.label }
+{ % added - gnp. Provide label formatting by organization if editor is null.
+  editor empty.or.unknown
+    { organization empty.or.unknown
+        { key empty.or.unknown
+            { "no key, editor or organization in " cite$ * warning$
+              cite$ #1 #3 substring$ }
+            'key
+          if$
+        }
+        { organization }
+      if$
+    }
+    { editor format.lab.names }
+  if$
+}
+
+FUNCTION { author.editor.key.label }
+{
+  author empty.or.unknown
+    { editor empty.or.unknown
+          { key empty.or.unknown
+               { "no key, author, or editor in " cite$ * warning$
+                 cite$ #1 #3 substring$ }
+             'key
+           if$
+         }
+          { editor format.lab.names }
+      if$
+    }
+    { author format.lab.names }
+  if$
+}
+
+FUNCTION { calc.label }
+{
+  % Changed - GNP. See also author.organization.sort, editor.organization.sort
+  % Form label for BibTeX entry. The classification of which fields are used
+  % for which type of entry (book, inbook, etc.) are taken from alpha.bst.
+  % The change here from newapa is to also include organization as a
+  % citation label if author or editor is missing.
+
+  type$ "book" =
+  type$ "inbook" =
+  or
+  type$ "periodical" =
+  or
+    'author.editor.key.label
+    { type$ "proceedings" =
+        'editor.key.organization.label
+        { type$ "manual" =
+            'author.key.organization.label
+            'author.key.label
+          if$
+        }
+      if$
+    }
+  if$
+
+  author empty.or.unknown  % generate the full label citation information.
+    {
+      editor empty.or.unknown
+        {
+          organization empty.or.unknown
+            {
+              key empty.or.unknown
+                {
+                  "no author, editor, organization, or key in " cite$ * warning$
+                  "??"
+                }
+                { key }
+              if$
+            }
+            { organization }
+          if$
+        }
+        { editor my.full.label }
+      if$
+    }
+    { author my.full.label }
+  if$
+
+  % leave label on the stack, to be popped when required.
+
+  "}{" * swap$ * "}{" *
+  %  year field.or.null purify$ #-1 #4 substring$ *
+  %
+  % save the year for sort processing afterwards (adding a, b, c, etc.)
+  %
+  year field.or.null purify$ #-1 #4 substring$
+  'label.year :=
+}
+
+%
+% Change by Gerry: use number-like citations for transactions
+% 2011/03/23
+% Reverting: Ayman
+FUNCTION {output.bibitem}
+{ newline$
+  "\bibitem{" write$
+  cite$ write$
+  "}" write$
+  newline$
+  ""
+  before.all 'output.state :=
+}
+
+% FUNCTION { output.bibitem }
+% {
+%   newline$
+%   "\bibitem[\protect\citeauthoryear{" write$
+%   calc.label write$
+%   sort.year write$
+%   "}]%" writeln
+%   "        {" write$
+%   cite$ write$
+%   "}" writeln
+%   ""
+%   before.all 'output.state :=
+% }
+
+
+FUNCTION { output.issue.doi.coden.isxn.lccn.url }
+{ % enter and return with stack empty
+  %% We switch now from buffered output to output of complete lines, so
+  %% that the Issue .. URL data have their own lines, and are less likely
+  %% to be line-wrapped by BibTeX's short-sighted algorithm, which wraps
+  %% lines longer than 79 characters, backtracking to what it thinks is
+  %% a break point in the string.  Any such wrapping MUST be undone to
+  %% prevent percent-newline from appearing in DOIs and URLs.  The
+  %% output data are intentionally wrapped in \showxxx{} macros at
+  %% beginning of line, and that supply their own punctuation (if they
+  %% are not defined to suppress output entirely), to make it easier for
+  %% other software to recover them from .bbl files.
+  %%
+  %% It also makes it possible to later change the macro definitions
+  %% to suppress particular output values, or alter their appearance.
+  %%
+  %% Note that it is possible for theses, technical reports, and
+  %% manuals to have ISBNs, and anything that has an ISBN may also
+  %% have an ISSN.  When there are no values for these keys, there
+  %% is no output generated for them here.
+
+  "\newblock" writeln
+  after.block 'output.state :=
+
+  output.issue
+  output.isbn
+  output.coden  % CODEN is functionally like ISSN, so output them sequentially
+  output.issn
+  output.lccn
+  output.doi    % DOI is ALWAYS last according to CrossRef DOI documentation
+  output.url    % but ACM wants URL last
+}
+
+FUNCTION { output.issue.doi.coden.isxn.lccn.url.note }
+{ % enter with stack empty, return with empty string on stack
+  output.issue.doi.coden.isxn.lccn.url
+  note empty.or.unknown
+    { }
+    {
+      "\newblock" writeln
+      output.note
+    }
+  if$
+  ""
+}
+
+FUNCTION { output.issue.doi.coden.isxn.lccn.url.note.check }
+{ % enter with stack empty, return with empty string on stack
+  output.issue.doi.coden.isxn.lccn.url
+  note empty.or.unknown
+    { }
+    {
+      "\newblock" writeln
+      output.note.check
+    }
+  if$
+  ""
+}
+
+FUNCTION { article }
+{
+  output.bibitem
+
+  author empty.or.unknown
+    {
+      editor empty.or.unknown
+        { "neither author and editor supplied for " cite$ * warning$ }
+        { format.editors "editor" output.check }
+      if$
+    }
+    { format.authors "author" output.check }
+  if$
+
+  author format.no.key output       % added
+  output.year.check                 % added
+  new.block
+  format.articletitle "title" output.check
+  new.block
+  howpublished output
+
+  crossref missing$
+    { format.journal.volume.number.day.month.year }
+    {
+      "cross reference in @Article{...} is unusual" warning$
+      format.article.crossref output.nonnull
+    }
+  if$
+  output
+
+  format.pages.check.without.articleno output
+  format.articleno.numpages output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { book }
+{
+  output.bibitem
+  author empty.or.unknown
+    { format.editors "author and editor" output.check }
+    { format.authors output.nonnull
+      crossref missing$
+        { "author and editor" editor either.or.check }
+        'skip$
+      if$
+    }
+  if$
+  output.year.check       % added
+  new.block
+  format.btitle "title" output.check
+  crossref missing$
+    { new.sentence              % jtb: start a new sentence for series/volume
+      format.bvolume output
+      new.block
+      format.number.series output
+      new.sentence
+      publisher "publisher" output.check
+      address "address" output.check    % jtb: require address
+      fin.sentence
+      pages empty.or.unknown
+        { format.bookpages }    % use bookpages when pages empty
+        { format.pages.check "pages" tie.or.space.connect }
+      if$
+      output
+    }
+    { new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { booklet }
+{
+  output.bibitem
+  format.authors output
+  author format.key output          % added
+  output.year.check                 % added
+  new.block
+  format.title "title" output.check
+  new.block
+  howpublished output
+  address output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { inbook }
+{
+  output.bibitem
+  author empty.or.unknown
+    { format.editors
+      "author and editor" output.check
+    }
+    { format.authors output.nonnull
+      crossref missing$
+    { "author and editor" editor either.or.check }
+    'skip$
+      if$
+    }
+  if$
+  output.year.check                 % added
+  new.block
+  format.btitle "title" output.check
+  crossref missing$
+    { new.sentence              % jtb: start a new sentence for series/volume
+      format.bvolume output
+      new.block
+      format.number.series output
+      new.sentence
+      publisher "publisher" output.check
+      address "address" output.check    % jtb: require address
+      format.bookpages output
+      format.chapter.pages
+      "chapter and pages" output.check  % jtb: moved from before publisher
+    }
+    {
+      format.bookpages output
+      format.chapter.pages "chapter and pages" output.check
+      new.block
+      format.book.crossref output.nonnull
+    }
+  if$
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { incollection }
+{
+  output.bibitem
+  format.authors "author" output.check
+  author format.key output       % added
+  output.year.check              % added
+  new.block
+  format.articletitle "title" output.check
+  new.block
+  crossref missing$
+    { format.in.ed.booktitle "booktitle" output.check
+      new.sentence                % jtb: start a new sentence for series/volume
+      format.bvolume output
+      format.number.series output
+      new.sentence
+      publisher "publisher" output.check
+      address "address" output.check      % jtb: require address
+      format.bookpages output
+      format.chapter.pages output % gnp - was special.output.nonnull
+                                  % left out comma before page numbers
+                                  % jtb: moved from before publisher
+    }
+    {
+      format.incoll.inproc.crossref output.nonnull
+      format.chapter.pages output
+    }
+  if$
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { inproceedings }
+{
+  output.bibitem
+  format.authors "author" output.check
+  author format.key output            % added
+  output.year.check                   % added
+  new.block
+  format.articletitle "title" output.check
+  howpublished output.dot.space
+  crossref missing$
+    {
+      journal missing$          % jtb: proceedings appearing in journals
+        { format.in.emphasize.booktitle format.city "booktitle"  output.check.dot.space
+          format.series output.removenospace
+          format.editors.fml output % BV 2011/09/27 Moved dot to comma
+          format.bvolume.noseries output
+          new.sentence
+          organization output
+          publisher "publisher" output.check % jtb: require publisher (?)
+          address "address" output.check  % jtb: require address
+          format.bookpages output
+        }
+        {
+           format.in.booktitle format.city "booktitle" output.check
+           format.editors.fml output
+           new.sentence
+           format.journal.volume.number.day.month.year output
+        }
+      if$
+      format.articleno output
+      format.pages.check.without.articleno output
+    }
+    {
+      format.incoll.inproc.crossref output.nonnull
+      format.articleno output
+      format.pages.check.without.articleno output
+    }
+  if$
+  format.articleno.numpages output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { conference } { inproceedings }
+
+FUNCTION { manual }
+{
+  output.bibitem
+  author empty.or.unknown
+    { editor empty.or.unknown
+      { organization "organization" output.check
+        organization format.key output }  % if all else fails, use key
+      { format.editors "author and editor" output.check }
+      if$
+    }
+    { format.authors output.nonnull }
+    if$
+  output.year.check                 % added
+  new.block
+  format.btitle "title" output.check
+  organization address new.block.checkb
+  % jtb: back to normal style: organization, address
+  organization "organization" output.check
+  address output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { mastersthesis }
+{
+  output.bibitem
+  format.authors "author" output.check
+  author format.key output          % added
+  output.year.check                 % added
+  new.block
+  format.title emphasize "title" output.check  % NB: ACM style requires emphasized thesis title
+  new.block
+  "Master's\ thesis" format.thesis.type output new.sentence  % Added dot. BV 2011/09/27
+  school "school" output.check
+  address output
+  new.block
+  format.advisor output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { misc }
+{
+  output.bibitem
+  format.authors output
+  author format.key output            % added
+  output.year.check                   % added
+  title howpublished new.block.checkb
+  format.title output
+  new.block
+  howpublished output
+  "" output.nonnull.dot.space
+  output.day.month.year              % Gerry - appears odd if (only) the year is 'repeated' but (appears) 'valuable' if the month/day is _also_ included - 2011/09/28
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { phdthesis }
+{
+  output.bibitem
+  format.authors "author" output.check
+  author format.key output          % added
+  output.year.check                 % added
+  new.block
+  format.title emphasize "title" output.check  % NB: ACM style requires emphasized thesis title
+  new.block
+ "Ph.D. Dissertation" format.thesis.type output new.sentence % Added dot. BV 2011/09/27
+  school "school" output.check
+  address output
+  new.block
+  format.advisor output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION {format.date}
+{ year empty.or.unknown
+    { month empty.or.unknown
+        {
+          ""                    % output empty date if year/month both empty
+          day empty.or.unknown
+            {  }
+            { "there's a day but no month or year in " cite$ * warning$ }
+          if$
+        }
+        { "there's a month but no year in " cite$ * warning$
+          month
+          day empty.or.unknown
+            { }
+            { " " * day * }
+          if$
+        }
+      if$
+    }
+    { month empty.or.unknown
+        {
+          year                  % output only year if month empty
+          day empty.or.unknown
+            {  }
+            { "there's a day and year but no month in " cite$ * warning$ }
+          if$
+        }
+        {
+          month " " *
+          day empty.or.unknown
+            { }
+            { day * ", " * }
+          if$
+          year *
+        }
+      if$
+    }
+  if$
+}
+
+FUNCTION {new.block.checka}
+{
+  empty.or.unknown
+    'skip$
+    'new.block
+  if$
+}
+
+FUNCTION { periodical }
+{
+  output.bibitem
+  editor empty.or.unknown
+    { organization output }
+    { format.editors output.nonnull }
+  if$
+  new.block
+  title emphasize "title" output.check
+  format.date output
+  new.sentence
+  publisher output
+  address output
+  howpublished new.block.checka
+  howpublished output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { proceedings }
+{
+  output.bibitem
+  editor empty.or.unknown
+    { organization output
+      organization format.key output }  % gnp - changed from author format.key
+    { format.editors output.nonnull }
+  if$
+  % author format.key output             % gnp - removed (should be either
+  %                                        editor or organization
+  output.year.check                    % added (newapa)
+  new.block
+  format.btitle format.city "title" output.check        % jtb: added city
+  new.sentence
+  format.bvolume output
+  format.number.series output
+  new.sentence
+  organization output
+  % jtb: normal order: publisher, address
+  publisher output
+  address output
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { techreport }
+{
+  output.bibitem
+  format.authors "author" output.check
+  author format.key output             % added
+  output.year.check                    % added
+  new.block
+  format.btitle "title" output.check
+  new.block
+%   format.tr.number output               % jtb: moved month ...
+  format.tr.number output new.sentence    % Gerry  - need dot 2011/09/28
+  institution "institution" output.check
+  address output
+  new.sentence
+  format.named.pages output
+  % ACM omits year at end in transactions style
+  % format.day.month.year output.nonnull.dot.space  % jtb: ... to here (no parens)
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note
+  fin.entry
+}
+
+FUNCTION { unpublished }
+{
+  output.bibitem
+  format.authors
+  "author" output.check
+  author format.key output              % added
+  output.year.check                     % added
+  new.block
+  format.title "title" output.check
+  fin.sentence
+  output.day.month.year                 % UTAH
+  fin.block
+  output.issue.doi.coden.isxn.lccn.url.note.check
+  fin.entry
+}
+
+FUNCTION { default.type } { misc }
+
+%%% ACM journal-style month definitions: full name if 1--5 letters, else
+%%% abbreviation of 3 or 4 characters and a dot
+
+MACRO {jan}             {"Jan."}
+
+MACRO {feb}             {"Feb."}
+
+MACRO {mar}             {"March"}
+
+MACRO {apr}             {"April"}
+
+MACRO {may}             {"May"}
+
+MACRO {jun}             {"June"}
+
+MACRO {jul}             {"July"}
+
+MACRO {aug}             {"Aug."}
+
+MACRO {sep}             {"Sept."}
+
+MACRO {oct}             {"Oct."}
+
+MACRO {nov}             {"Nov."}
+
+MACRO {dec}             {"Dec."}
+
+
+%%% ====================================================================
+%%%                 I M P O R T A N T   C H A N G E
+%%%
+%%% For the 2009 release of the official acm-*.bst files, there are to
+%%% be NO predefined journal abbreviations in those style files.
+%%%
+%%% ACM may later develop an official list of mappings of full journal
+%%% names of commonly-cited journals to ACM-preferred abbreviations, but
+%%% authors should consider that use of any of these commented-out
+%%% abbreviations is DEPRECATED unless the BibTeX file itself provides
+%%% its own @String{name = "value"} definitions.
+%%%
+%%% Use of journal (and publisher and address) @String{...}
+%%% abbreviations, as opposed to explicit value assignments such as
+%%% journal = "J. ACM" and publisher = "IEEE", is preferred in
+%%% bibliographic databases, because it makes it easier for journal
+%%% production staff to replace those definitions by publisher-preferred
+%%% abbreviations when articles are typeset for publication.
+%%%
+%%% For historical reasons, and because some of these abbreviations are
+%%% used in other (non-ACM) bibliography style files, they are preserved
+%%% here in comments.  Future releases of the acm*-.bst files are likely
+%%% to remove them entirely.
+%%% ====================================================================
+%%%
+%%% DEPRECATED: MACRO {acmcs}           {"ACM Comput. Surv."}                   % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {acmlett}         {"ACM Lett. Program. Lang. Syst."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {acta}            {"Acta Inf."}                           % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ai}              {"Artificial Intelligence"}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {al}              {"Ada Lett."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {acr}             {"Adv. Comput. Res."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {bit}             {"Bit"}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {cacm}            {"Commun. ACM"}                         % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {cj}              {"Comput. J."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {cn}              {"Comput. Netw."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {cl}              {"Comput. Lang."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ibmjrd}          {"IBM J. Res. and Development"}         % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ibmsj}           {"IBM Systems Journal"}                 % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ict}             {"Inf. Contr."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieebcs}          {"IEE/BCS Softw. Eng. J."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieees}           {"IEEE Softw."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieeese}          {"IEEE Trans. Softw. Eng."}             % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieeetc}          {"IEEE Trans. Comput."}                 % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieeetcad}        {"IEEE Transactions on Computer-Aided Design of Integrated Circuits"} % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieeetpds}        {"IEEE Trans. Parall. Distrib. Syst."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ieeetit}         {"IEEE Trans. Inf. Theory"}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ipl}             {"Inf. Process. Lett."}                 % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {icp}             {"Inf. Comput."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ist}             {"Inf. Softw. Tech."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ijsa}            {"Int. J. Supercomput. Appl."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ijpp}            {"Int. J. Parallel Program."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jacm}            {"J. ACM"}                              % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: % MACRO {jcss}          {"Journal of Computer and System Sciences"} % original BibTeX
+%%% DEPRECATED: MACRO {jcss}            {"J. Comput. Syst. Sci."}               % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jlp}             {"J. Logic Program."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jfp}             {"J. Funct. Program."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jsmrp}           {"J. Softw. Maint. Res. Pract."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jss}             {"J. Syst. Softw."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jlc}             {"J. Logic and Comput."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {jlsc}            {"J. Lisp Symb. Comput."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {lpls}            {"Lett. Program. Lang. Syst."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {mor}             {"Math. Oper. Res."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {mscs}            {"Math. Struct. Comput. Sci."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {mst}             {"Math. Syst. Theor."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {ngc}             {"New Gen. Comput."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {scp}             {"Sci. Comput. Program."}               % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {sicomp}          {"SIAM J. Comput."}                     % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {spe}             {"Softw. Pract. Exper."}
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {tocs}            {"ACM Trans. Comput. Syst."}            % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {tods}            {"ACM Trans. Database Syst."}           % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {tog}             {"ACM Trans. Graphics"}                 % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {toms}            {"ACM Trans. Math. Softw."}             % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {toois}           {"ACM Trans. Office Inf. Syst."}        % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {toplas}          {"ACM Trans. Program. Lang. Syst."}     % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {tcs}             {"Theor. Comput. Sci."}                 % original BibTeX
+%%% DEPRECATED:
+%%% DEPRECATED: MACRO {tr}              {"Tech. Rep."}
+%%% ====================================================================
+
+READ
+
+FUNCTION { sortify }
+{
+  purify$
+  "l" change.case$
+}
+
+FUNCTION { chop.word }
+{
+  's :=
+  'len :=
+  s #1 len substring$ =
+    { s len #1 + global.max$ substring$ }
+    's
+  if$
+}
+
+FUNCTION { sort.format.names }
+{
+  's :=
+  #1 'nameptr :=
+  ""
+  s num.names$ 'numnames :=
+  numnames 'namesleft :=
+    { namesleft #0 > }
+    { nameptr #1 >
+          { "   " * }
+         'skip$
+      if$
+  %      s nameptr "{ff{ } }{ll{ }}{  vv{ }}{  jj{ }}" format.name$ 't :=
+      s nameptr "{vv{ } }{ll{ }}{  f{ }}{  jj{ }}" format.name$ 't :=
+      nameptr numnames = t "others" = and
+          { " et~al" * }
+          { t sortify * }
+      if$
+      nameptr #1 + 'nameptr :=
+      namesleft #1 - 'namesleft :=
+    }
+  while$
+}
+
+FUNCTION { sort.format.title }
+{
+  't :=
+  "A " #2
+    "An " #3
+      "The " #4 t chop.word
+    chop.word
+  chop.word
+  sortify
+  #1 global.max$ substring$
+}
+
+FUNCTION { author.sort }
+{
+  author empty.or.unknown
+    { key empty.or.unknown
+         { "to sort, need author or key in " cite$ * warning$
+           "" }
+         { key sortify }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION { author.editor.sort }
+{
+  author empty.or.unknown
+    {
+      editor empty.or.unknown
+         {
+           key empty.or.unknown
+             { "to sort, need author, editor, or key in " cite$ * warning$
+               ""
+             }
+             { key sortify }
+           if$
+         }
+         { editor sort.format.names }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION { author.organization.sort }
+{
+  % added - GNP. Stack author or organization for sorting (from alpha.bst).
+  % Unlike alpha.bst, we need entire names, not abbreviations
+
+  author empty.or.unknown
+    { organization empty.or.unknown
+        { key empty.or.unknown
+            { "to sort, need author, organization, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { organization sortify }
+      if$
+    }
+    { author sort.format.names }
+  if$
+}
+
+FUNCTION { editor.organization.sort }
+{
+  % added - GNP. Stack editor or organization for sorting (from alpha.bst).
+  % Unlike alpha.bst, we need entire names, not abbreviations
+
+  editor empty.or.unknown
+    { organization empty.or.unknown
+        { key empty.or.unknown
+            { "to sort, need editor, organization, or key in " cite$ * warning$
+              ""
+            }
+            { key sortify }
+          if$
+        }
+        { organization sortify }
+      if$
+    }
+    { editor sort.format.names }
+  if$
+}
+
+FUNCTION { presort }
+{
+  % Presort creates the bibentry's label via a call to calc.label, and then
+  % sorts the entries based on entry type. Chicago.bst adds support for
+  % including organizations as the sort key; the following is stolen from
+  % alpha.bst.
+
+  calc.label sortify % recalculate bibitem label
+  year field.or.null purify$ #-1 #4 substring$ * % add year
+  "    "
+  *
+  type$ "book" =
+  type$ "inbook" =
+  or
+    'author.editor.sort
+    { type$ "proceedings" =
+        'editor.organization.sort
+        { type$ "manual" =
+            'author.organization.sort
+            'author.sort
+          if$
+        }
+      if$
+    }
+  if$
+  #1 entry.max$ substring$        % added for newapa
+  'sort.label :=                  % added for newapa
+  sort.label                      % added for newapa
+  *
+  "    "
+  *
+  title field.or.null
+  sort.format.title
+  *
+  #1 entry.max$ substring$
+  'sort.key$ :=
+}
+
+ITERATE { presort }
+
+SORT             % by label, year, author/editor, title
+
+FUNCTION { initialize.extra.label.stuff }
+{ #0 int.to.chr$ 'last.label :=
+  "" 'next.extra :=
+  #0 'last.extra.num :=
+}
+
+FUNCTION { forward.pass }
+{
+  % Pass through all entries, comparing current entry to last one.
+  % Need to concatenate year to the stack (done by calc.label) to determine
+  % if two entries are the same (see presort)
+
+  last.label
+  % OLD:calc.label year field.or.null purify$ #-1 #4 substring$ * % add year
+  % NEW:
+  author.key.label year field.or.null purify$ #-1 #4 substring$ * % add year
+  #1 entry.max$ substring$ =     % are they equal?
+     { last.extra.num #1 + 'last.extra.num :=
+       last.extra.num int.to.chr$ 'extra.label :=
+     }
+     { "a" chr.to.int$ 'last.extra.num :=
+       "" 'extra.label :=
+       % OLD: calc.label year field.or.null purify$ #-1 #4 substring$ * % add year
+       % NEW:
+       author.key.label year field.or.null purify$ #-1 #4 substring$ * % add year
+       #1 entry.max$ substring$ 'last.label := % assign to last.label
+     }
+  if$
+}
+
+FUNCTION { reverse.pass }
+{
+  next.extra "b" =
+    { "a" 'extra.label := }
+     'skip$
+  if$
+  label.year extra.label * 'sort.year :=
+  extra.label 'next.extra :=
+}
+
+EXECUTE {initialize.extra.label.stuff}
+
+ITERATE {forward.pass}
+
+REVERSE {reverse.pass}
+
+FUNCTION { bib.sort.order }
+{
+  sort.label
+  "    "
+  *
+  year field.or.null sortify
+  *
+  "    "
+  *
+  title field.or.null
+  sort.format.title
+  *
+  #1 entry.max$ substring$
+  'sort.key$ :=
+}
+
+ITERATE { bib.sort.order }
+
+SORT             % by sort.label, year, title --- giving final bib. order.
+
+FUNCTION { begin.bib }
+{
+  %% Set to #0 show 13-digit ISBN in preference to 10-digit ISBN.
+  %% Set to #1 to show both 10-digit and 13-digit ISBNs.
+  #1 'show-isbn-10-and-13 :=
+
+  "%%% -*-BibTeX-*-" writeln
+  "%%% Do NOT edit. File created by BibTeX with style" writeln
+  "%%% ACM-Reference-Format-Journals [18-Jan-2012]." writeln
+  "" writeln
+
+  preamble$ empty.or.unknown
+    'skip$
+    { preamble$ writeln }
+  if$
+  "\begin{thebibliography}{00}" writeln
+  ""                                                                         writeln
+  "%%% ====================================================================" writeln
+  "%%% NOTE TO THE USER: you can override these defaults by providing"       writeln
+  "%%% customized versions of any of these macros before the \bibliography"  writeln
+  "%%% command.  Each of them MUST provide its own final punctuation,"       writeln
+  "%%% except for \shownote{}, \showDOI{}, and \showURL{}.  The latter two"  writeln
+  "%%% do not use final punctuation, in order to avoid confusing it with"    writeln
+  "%%% the Web address."                                                     writeln
+  "%%%"                                                                      writeln
+  "%%% To suppress output of a particular field, define its macro to expand" writeln
+  "%%% to an empty string, or better, \unskip, like this:"                   writeln
+  "%%%"                                                                      writeln
+  "%%% \newcommand{\showDOI}[1]{\unskip}   % LaTeX syntax"                   writeln
+  "%%%"                                                                      writeln
+  "%%% \def \showDOI #1{\unskip}           % plain TeX syntax"               writeln
+  "%%%"                                                                      writeln
+  "%%% ====================================================================" writeln
+  ""                                                                         writeln
+
+  %% ACM publications do not use CODEN, ISSN, and LCCN data, so their default
+  %% macro wrappers expand to \unskip, discarding their values and unwanted
+  %% space.
+  %%
+  %% For other publications, prior definitions like these may be useful:
+  %%
+  %%     Plain TeX:
+  %%         \def \showCODEN     #1{CODEN #1.}
+  %%         \def \showISSN      #1{ISSN #1.}
+  %%         \def \showLCCN      #1{LCCN #1.}
+  %%
+  %%     LaTeX:
+  %%         \newcommand{\showCODEN}[1]{CODEN #1.}
+  %%         \newcommand{\showISSN}[1]#1{ISSN #1.}
+  %%         \newcommand{\showLCCN}[1]{LCCN #1.}
+
+  "\ifx \showCODEN    \undefined \def \showCODEN     #1{\unskip}     \fi" writeln
+  "\ifx \showDOI      \undefined \def \showDOI       #1{{\tt DOI:}\penalty0{#1}\ } \fi" writeln
+  % ACM styles omit ISBNs, but they can be included by suitable definitions of
+  % \showISBNx and \showISBNxiii before the .bbl file is read
+  "\ifx \showISBNx    \undefined \def \showISBNx     #1{\unskip}     \fi" writeln
+  "\ifx \showISBNxiii \undefined \def \showISBNxiii  #1{\unskip}     \fi" writeln
+  "\ifx \showISSN     \undefined \def \showISSN      #1{\unskip}     \fi" writeln
+  "\ifx \showLCCN     \undefined \def \showLCCN      #1{\unskip}     \fi" writeln
+  "\ifx \shownote     \undefined \def \shownote      #1{#1}          \fi" writeln % NB: final period supplied by add.period$ above
+  "\ifx \showarticletitle \undefined \def \showarticletitle #1{#1}   \fi" writeln
+  "\ifx \showURL      \undefined \def \showURL       #1{#1}          \fi" writeln
+}
+
+EXECUTE {begin.bib}
+
+EXECUTE {init.state.consts}
+
+ITERATE {call.type$}
+
+FUNCTION { end.bib }
+{
+  newline$
+  "\end{thebibliography}"
+  writeln
+}
+
+EXECUTE {end.bib}
+
+%%% End of ACM-Reference-Format-Journals.bst V1.00 - 18 January 2012
+
@@ -0,0 +1,221 @@
+%%
+%% This is file `acmcopyright.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% acmcopyright.dtx  (with options: `style')
+%% 
+%% IMPORTANT NOTICE:
+%% 
+%% For the copyright see the source file.
+%% 
+%% Any modified versions of this file must be renamed
+%% with new filenames distinct from acmcopyright.sty.
+%% 
+%% For distribution of the original source see the terms
+%% for copying and modification in the file acmcopyright.dtx.
+%% 
+%% This generated file may be distributed as long as the
+%% original source files, as listed above, are part of the
+%% same distribution. (The sources need not necessarily be
+%% in the same archive or directory.)
+%% \CharacterTable
+%%  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
+%%   Lower-case    \a\b\c\d\e\f\g\h\i\j\k\l\m\n\o\p\q\r\s\t\u\v\w\x\y\z
+%%   Digits        \0\1\2\3\4\5\6\7\8\9
+%%   Exclamation   \!     Double quote  \"     Hash (number) \#
+%%   Dollar        \$     Percent       \%     Ampersand     \&
+%%   Acute accent  \'     Left paren    \(     Right paren   \)
+%%   Asterisk      \*     Plus          \+     Comma         \,
+%%   Minus         \-     Point         \.     Solidus       \/
+%%   Colon         \:     Semicolon     \;     Less than     \<
+%%   Equals        \=     Greater than  \>     Question mark \?
+%%   Commercial at \@     Left bracket  \[     Backslash     \\
+%%   Right bracket \]     Circumflex    \^     Underscore    \_
+%%   Grave accent  \`     Left brace    \{     Vertical bar  \|
+%%   Right brace   \}     Tilde         \~}
+\NeedsTeXFormat{LaTeX2e}
+\ProvidesPackage{acmcopyright}
+[2014/06/29 v1.2 Copyright statemens for ACM classes]
+\newif\if@printcopyright
+\@printcopyrighttrue
+\newif\if@printpermission
+\@printpermissiontrue
+\newif\if@acmowned
+\@acmownedtrue
+\RequirePackage{xkeyval}
+\define@choicekey*{ACM@}{acmcopyrightmode}[%
+  \acm@copyrightinput\acm@copyrightmode]{none,acmcopyright,acmlicensed,%
+  rightsretained,usgov,usgovmixed,cagov,cagovmixed,%
+  licensedusgovmixed,licensedcagovmixed,othergov,licensedothergov}{%
+  \@printpermissiontrue
+  \@printcopyrighttrue
+  \@acmownedtrue
+  \ifnum\acm@copyrightmode=0\relax % none
+   \@printpermissionfalse
+   \@printcopyrightfalse
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=2\relax % acmlicensed
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=3\relax % rightsretained
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=4\relax % usgov
+   \@printpermissiontrue
+   \@printcopyrightfalse
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=6\relax % cagov
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=8\relax % licensedusgovmixed
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=9\relax % licensedcagovmixed
+   \@acmownedfalse
+  \fi
+  \ifnum\acm@copyrightmode=10\relax % othergov
+   \@acmownedtrue
+  \fi
+  \ifnum\acm@copyrightmode=11\relax % licensedothergov
+   \@acmownedfalse
+   \@printcopyrightfalse
+  \fi}
+\def\setcopyright#1{\setkeys{ACM@}{acmcopyrightmode=#1}}
+\setcopyright{acmcopyright}
+\def\@copyrightowner{%
+  \ifcase\acm@copyrightmode\relax % none
+  \or % acmcopyright
+  ACM.
+  \or % acmlicensed
+  Copyright held by the owner/author(s). Publication rights licensed to
+  ACM.
+  \or % rightsretained
+  Copyright held by the owner/author(s).
+  \or % usgov
+  \or % usgovmixed
+  ACM.
+  \or % cagov
+  Crown in Right of Canada.
+  \or %cagovmixed
+  ACM.
+  \or %licensedusgovmixed
+  Copyright held by the owner/author(s). Publication rights licensed to
+  ACM.
+  \or %licensedcagovmixed
+  Copyright held by the owner/author(s). Publication rights licensed to
+  ACM.
+  \or % othergov
+  ACM.
+  \or % licensedothergov
+  \fi}
+\def\@copyrightpermission{%
+  \ifcase\acm@copyrightmode\relax % none
+  \or % acmcopyright
+   Permission to make digital or hard copies of all or part of this
+   work for personal or classroom use is granted without fee provided
+   that copies are not made or distributed for profit or commercial
+   advantage and that copies bear this notice and the full citation on
+   the first page. Copyrights for components of this work owned by
+   others than ACM must be honored. Abstracting with credit is
+   permitted. To copy otherwise, or republish, to post on servers or to
+   redistribute to lists, requires prior specific permission
+   and\hspace*{.5pt}/or  a fee. Request permissions from
+   permissions@acm.org.
+  \or % acmlicensed
+   Permission to make digital or hard copies of all or part of this
+   work for personal or classroom use is granted without fee provided
+   that copies are not made or distributed for profit or commercial
+   advantage and that copies bear this notice and the full citation on
+   the first page. Copyrights for components of this work owned by
+   others than the author(s) must be honored. Abstracting with credit
+   is permitted.  To copy otherwise, or republish, to post on servers
+   or to  redistribute to lists, requires prior specific permission
+   and\hspace*{.5pt}/or  a fee. Request permissions from
+   permissions@acm.org.
+  \or % rightsretained
+   Permission to make digital or hard copies of part or all of this work
+   for personal or classroom use is granted without fee provided that
+   copies are not made or distributed for profit or commercial advantage
+   and that copies bear this notice and the full citation on the first
+   page. Copyrights for third-party components of this work must be
+   honored. For all other uses, contact the
+   owner\hspace*{.5pt}/author(s).
+  \or % usgov
+   This paper is authored by an employee(s) of the United States
+   Government and is in the public domain. Non-exclusive copying or
+   redistribution is allowed, provided that the article citation is
+   given and the authors and agency are clearly identified as its
+   source.
+  \or % usgovmixed
+   ACM acknowledges that this contribution was authored or co-authored
+   by an employee, or contractor of the national government. As such,
+   the Government retains a nonexclusive, royalty-free right to
+   publish or reproduce this article, or to allow others to do so, for
+   Government purposes only. Permission to make digital or hard copies
+   for personal or classroom use is granted. Copies must bear this
+   notice and the full citation on the first page. Copyrights for
+   components of this work owned by others than ACM must be
+   honored. To copy otherwise, distribute, republish, or post,
+   requires prior specific permission and\hspace*{.5pt}/or a
+   fee. Request permissions from permissions@acm.org.
+  \or % cagov
+   This article was authored by employees of the Government of Canada.
+   As such, the Canadian government retains all interest in the
+   copyright to this work and grants to ACM a nonexclusive,
+   royalty-free right to publish or reproduce this article, or to allow
+   others to do so, provided that clear attribution is given both to
+   the authors and the Canadian government agency employing them.
+   Permission to make digital or hard copies for personal or classroom
+   use is granted. Copies must bear this notice and the full citation
+   on the first page.  Copyrights for components of this work owned by
+   others than the Canadain Government must be honored. To copy
+   otherwise, distribute, republish, or post, requires prior specific
+   permission and\hspace*{.5pt}/or a fee. Request permissions from
+   permissions@acm.org.
+  \or % cagovmixed
+   ACM acknowledges that this contribution was co-authored by an
+   affiliate of the national government of Canada. As such, the Crown
+   in Right of Canada retains an equal interest in the copyright.
+   Reprints must include clear attribution to ACM and the author's
+   government agency affiliation.  Permission to make digital or hard
+   copies for personal or classroom use is granted.  Copies must bear
+   this notice and the full citation on the first page. Copyrights for
+   components of this work owned by others than ACM must be honored.
+   To copy otherwise, distribute, republish, or post, requires prior
+   specific permission and\hspace*{.5pt}/or a fee. Request permissions
+   from permissions@acm.org.
+  \or % licensedusgovmixed
+   Publication rights licensed to ACM. ACM acknowledges that this
+   contribution was authored or co-authored by an employee, contractor
+   or affiliate of the United States government. As such, the
+   Government retains a nonexclusive, royalty-free right to publish or
+   reproduce this article, or to allow others to do so, for Government
+   purposes only.
+  \or % licensedcagovmixed
+   Publication rights licensed to ACM. ACM acknowledges that this
+   contribution was authored or co-authored by an employee, contractor
+   or affiliate of the national government of Canada. As such, the
+   Government retains a nonexclusive, royalty-free right to publish or
+   reproduce this article, or to allow others to do so, for Government
+   purposes only.
+  \or % othergov
+   ACM acknowledges that this contribution was authored or co-authored
+   by an employee, contractor or affiliate of a national government. As
+   such, the Government retains a nonexclusive, royalty-free right to
+   publish or reproduce this article, or to allow others to do so, for
+   Government purposes only.
+  \or % licensedothergov
+   Publication rights licensed to ACM. ACM acknowledges that this
+   contribution was authored or co-authored by an employee, contractor
+   or affiliate of a national government. As such, the Government
+   retains a nonexclusive, royalty-free right to publish or reproduce
+   this article, or to allow others to do so, for Government purposes
+   only.
+  \fi}
+\endinput
+%%
+%% End of file `acmcopyright.sty'.
@@ -0,0 +1,14 @@
+\begin{abstract}
+The Brazilian Public Software is a program by the Brazilian Federal
+Government to foster the sharing and collaboration on FOSS solutions for
+the public administration. In this paper, we present an integrated
+development platform that was developed for the program. The development
+of this platform used several FOSS applications, and contributed
+features back to them. We discuss the development methodology, platform
+architecture, and the user experience efforts carried out.
+\end{abstract}
+
+\category{H.5.m.}{Information Interfaces and Presentation
+  (e.g. HCI)}{Miscellaneous}
+
+\keywords{\plainkeywords}
@@ -0,0 +1,50 @@
+\section{Introduction}
+\label{sec:intro}
+
+During the last few decades, the Brazilian Federal Government has
+improved its software adoption and development processes. In 2003, the
+recommendation to adopt Free/Open Source Software (FOSS) become a public
+policy. In 2007, the Brazilian Government released a portal called
+Brazilian Public Software (\textit{Software Público Brasileiro} -- SPB,
+in Portuguese), with the goal of sharing FOSS projects developed by, or
+for, the Brazilian Government.
+
+The Brazilian legal instrument on software contracting
+(\textit{Instrução Normativa} 04/2012) mandates that public management
+must consult the SPB Portal to adopt a software solution. The
+acquisition of a proprietary solution must be explicitly justified by
+demonstrating that there is no suitable option in the SPB Portal.
+
+Since 2009, however, the SPB Portal was having several technical issues.
+The original codebase was not being developed anymore, and there as a
+large amount of technical debt to overcome. The system was a modified
+version of an existing FOSS platform that was not being developed
+anymore, and the portal maintenance was becoming harder and harder.
+
+From January 2014 to June 2016, a new platform for the SPB Portal was
+designed and developed by the University of Brasília (UnB) and the
+University of São Paulo (USP) in a partnership with the Brazilian
+Ministry of Budget, Planning, and Management. This new Portal was
+designed as an integrated platform for collaborative software
+development. It includes functionality for social networking, mailing
+lists, version control system, and source code quality monitoring. In
+this paper, we present an overview of this new generation of the SPB
+Portal.
+
+The project was developed by a team of 3 professors, 6 professionals, 2
+masters students, and approximately 40 undergrad students (not all of
+them at the same time, though -- graduations and other events triggered
+changes in the team).
+
+\begin{figure*}[hbt]
+  \centering
+    \includegraphics[width=.9\linewidth]{figures/home-SPB.png}
+  \caption{The new SPB Portal.}
+  \label{fig:spb}
+\end{figure*}
+
+Figure \ref{fig:spb} shows the home page of this integrated platform.
+The development tried to be as faithful as possible to FOSS development.
+All development was done in the open, and the changes we needed in the
+tools user were contributed back to their communities.
+
@@ -0,0 +1,73 @@
+\section{Brazilian Public Software versus Free/Open Source Software}
+\label{sec:spb}
+
+%TODO: Hilmer
+
+O software livre é considerado um fenômeno recente que ganhou destaque nos
+últimos anos e despertou maior interesse de observação por parte da academia.
+No entanto, desde o início da computação a maior parte dos desenvolvedores
+trabalhava da forma que hoje identificamos como software livre, ou seja,
+compartilhando código de forma aberta. Essa característica faz com que o código
+esteja disponível para inspeção, alteração, e utilização por qualquer pessoa,
+física ou jurídica~\cite{kon2012},
+~\cite{hippel2003}.
+
+Os elementos que diferenciam o software livre de outros tipos de software é o
+entendimento do processo de desenvolvimento, do contexto econômico, da relação
+entre os desenvolvedores e usuários, além das características éticas e legais
+que se relacionam ao software. No contexto do software livre é promovida a
+liberdade do usuário e seu desenvolvimento tem alicerce
+em colaboração e desenvolvimento aberto.\cite{meirelles2013}.
+
+Do ponto de vista econômico, diferentemente do que ocorre com o software
+proprietário, restrito, o software livre promove o estabelecimento de vários
+fornecedores que competem entre si com base no mesmo software. Essa competição
+mais forte entre fornecedores traz vantagens para os usuários, pois dá melhores
+garantias quanto ao desenvolvimento futuro do sistema e induz a uma redução nos
+preços. Essas liberdades e garantias sobre o software são estabelecidas no
+Brasil pela Lei 9610/98, lei de direitos autorais. Na sua maioria das vezes,
+essa proteção decorrente da lei segue aliada aos termos conferidos por um
+contrato atinente a determinado software. Esse contrato é denominado
+``licença''.  A licença de um software estabelece um rol de direitos e deveres
+que se projetam sobre um determinado usuário do software. Em especial, o que
+diferencia o software livre do software restrito é apenas a forma de
+licenciamento\cite{sabino2009}. As licenças de software livre são o
+que garantem o direito de executar, estudar, adaptar, e aperfeiçoar o software,
+como por exemplo as licenças \textit{GPL (GNU General Public License)} aceitas
+para projetos hospedados no portal do software público brasileiro.
+
+O Portal do Software Público Brasileiro (SPB), inaugurado em 2007, na prática,
+é um sistema web que se consolidou como um ambiente de compartilhamento de
+projetos de software. Oferece um espaço (comunidade) para cada software. Por
+isso, a atual plataforma para o SPB foi pensada para contemplar ferramentas que
+promovam a colaboração e a interação nas comunidades (por gestores, usuários e
+desenvolvedores) dos projetos, conforme as práticas usadas nas comunidades de
+software livre. Isso inclui listas de e-mail, fóruns de discussão, issue
+trackers, sistemas de controle de versão e ambientes de rede
+social.
+
+Inicialmente, o propósito do Portal era apenas compartilhar os softwares
+desenvolvidos no governo, visando diminuir os custos de contratação de
+software. Entretanto, se observou que ao disponibilizar os softwares
+rapidamente formaram-se comunidades em torno daquele software com diversas
+pessoas colaborando e compartilhando os resultados obtidos através do uso
+daquelas soluções. Dessa forma, algumas cooperativas de desenvolvimento de
+software e empresas privadas demonstraram o interesse em disponibilizar seus
+softwares na plataforma  do SPB.
+
+O conceito de software público diferencia-se do de software livre em alguns
+aspectos, destacando-se a atribuição de bem público ao software e a
+obrigatoriedade do software estar no Portal do Software Público. Embora haja
+algumas diferenças entre o que é um software livre e um software público
+brasileiro, há princípios comuns, como a tendência da descentralização na
+tomada de decisões, o intenso compartilhamento de informações e os processos de
+retroalimentação decorrentes do uso dos artefatos produzidos. Por um lado, o
+software livre se apresenta atualmente como um modelo já consolidado e viável
+em um número crescente de aplicações e ambientes. Por outro lado, restam
+incertezas jurídicas e econômicas. Alguns desses desafios estão vinculados às
+barreiras criadas pelo modelo e cultura do software
+restrito~\cite{kon2012}. Além dessas, existem também as dificuldades
+para a entrada e a permanência de novos contribuidores nos projetos. A questão
+que motivou esta pesquisa é que essas dificuldades podem ser maiores no
+contexto dos projetos de software público brasileiro, devido à estrutura
+organizacional e  aos processos do Governo Federal.
@@ -0,0 +1,105 @@
+\section{Architecture}
+\label{sec:architecture}
+
+%TODO: Kanashiro e Siqueira
+
+The two main requirements provided by the Brazilian Federal Government
+for the new platform were:
+%
+1) \textit{Integrate existing FOSS systems}, with minimal differences
+from their original versions. This way, the platform can benefit from
+improvements done by the upstream communities that provide those
+systems, and the maintenance effort that is specific for the SPB Portal
+should be reduced;
+%
+and
+2) \textit{Provide a consistent user interface} across the different
+systems, as well as centralized authentication.
+
+The first requirement was accomplished by dedicating specialized teams
+for each system that was being integrated. The teams would learn how to
+develop their assigned systems, and contribute the necessary features
+directly to the original communities, so that the version we used was
+not significantly different from the original. Of course, at times
+project deadlines forced us to use our own version before tho features
+were fully reviewed and integrated upstream to the original projects,
+but we managed to contribute the vast majority of the changes back.
+
+For the second requirement, we integrated a web integration platform
+called Colab\footnote{\url{https://github.com/colab/colab}}. Colab
+serves as a frontend for other web applications as a reverse proxy,
+manages authentication, and can apply changes to the HTML provided by
+the integrated applications in order to provide visual consistency.
+Colab had support for an initial set of applications (Trac, GNU Mailman,
+Apache Lucene) hard-coded; our team evolved Colab so that it can now
+receive plugins to add support for new applications with minimal changes
+to its existing core. We added support for the other applications used
+in the SPB platform: Noosfero, GitLab, and Mezuro.
+
+Noosfero\footnote{\url{http://noosfero.org/}} is a software for building
+social and collaboration networks. Besides the classical social
+networking features, it also provides publication features such as blogs
+and a general-purpose CMS (Content Management System). Most of the user
+interactions with SPB is through Noosfero: user registration, project
+home pages and documentation, and contact forms.
+GitLab\footnote{\url{http://gitlab.com/}} is a web-based Git repository
+manager with wiki pages and issue tracking features.
+Mezuro\footnote{\url{http://mezuro.org/}} is a platform to collect source code
+metric to monitor the internal quality of softwares written in C, C++,
+Java, Python, Ruby, and PHP. GNU Mailman is used for mailing lists.
+
+\begin{figure}[hbt]
+  \centering
+    \includegraphics[width=\linewidth]{figures/arch.png}
+  \caption{SPB architecture overview.}
+  \label{fig:architecture}
+\end{figure}
+
+The conceptual architecture of the platform is presented in Figure
+\ref{fig:architecture}. Colab initially handles all user interaction,
+directing requests to one of the integrated applications. It
+post-processes responses from the applications to apply a consistent
+visual appearance, manages authentication, and provides a unified search
+functionality: instead of using the redundant restricted search
+functionality of each application, a search in the SPB portal might
+return content from any of the applications, be it web pages, mailing
+list posts, or source code.
+
+%TODO: deixar coeso daqui para baixo
+
+\begin{figure*}[hbt]
+  \centering
+    \includegraphics[width=\linewidth]{figures/arch2.png}
+  \caption{Instanciation view of the SPB architecture.}
+  \label{fig:architecture2}
+\end{figure*}
+
+In real, the SPB platform was deployed in 7 virtual machines with different functions,
+as we can see in Figure \ref{fig:architecture2}.
+
+The \textit{reverseproxy} handles the HTTP requests and redirects them to the
+\textit{integration}, the \textit{email} sends and receives e-mails on behalf
+of the platform and the \textit{monitor} keeps the entire environment tracked.
+These three \textit{VMs} mentioned - \textit{reverseproxy}, \textit{email} and
+\textit{monitor} - are accessible via Internet and the other ones are only
+available in the local network created between them.
+
+\textit{Integration} works as a second layer of proxy beneath
+\textit{reverseproxy}, any request to the platform will be handled by it. The
+Colab service provides interface, authentication and search engine integration
+among all the services. When a request is received to a specific service,
+Colab authenticates the user in the target tool, sends the request and makes a
+visual transformation in the HTML page which is the content of the response.
+Another user-oriented feature is the integrated search engine, when the user
+want to find something in the platform Colab will perform the search in the
+whole databases. Colab itself provides a web interface for GNU Mailman and we
+have two others integrated tools in \textit{integration}: Gitlab and Prezento.
+Gitlab provides web interface for Git repositories and issues tracker, and
+Prezento is a front-end for source code static analysis.
+
+The source code static analysis is performed by \textit{mezuro}. It runs some
+static analysis tools on source code stored in repository and provide this data
+to Prezento. A social network and CMS (Content Manager System) is provided by
+Noosfero in \textit{social}, and the databases of all tools with a cache
+service are in \textit{database}.
+
@@ -0,0 +1,8 @@
+\section{Features}
+\label{sec:spb}
+
+%TODO: Paulo e Melissa
+
+...
+
+
@@ -0,0 +1,6 @@
+\section{Development Organization and Process}
+\label{sec:process}
+
+%TODO: Siqueira e Hilmer
+
+...
@@ -0,0 +1,33 @@
+\section{User eXperience evolution}
+
+The integration of collaborative environments goes beyond functional aspects.
+Offering the population an unified experience across these environments has
+been the key to encourage the use of the platform as it reduces the perception
+of complexity. Thus, the SPB Portal information architecture was redesigned
+to provide a transparent navigation and to reach users with different profiles.
+A process of harmonization has been employed on the interaction models of each
+tool to reduce the learning curve. At the same time, a new visual style was
+created to unify the navigation experience and to comply with the guidelines of
+the digital communication identity standard established by the Federal
+Government.
+
+With the increase in system features and the addition of new tools, the
+visual style has steadily evolved to keep the navigation unified.  Moreover,
+tools from different backgrounds, which in many cases provide similar
+functionality, prompted the development of an unified interface. Some
+features, such as search and user profile editing were eliminated from
+the individual applications, and implemented centrally to ensure a
+consistent look and feel.
+
+Another challenge was responsive web design. The integrated applications
+had varying degrees of support for responsiveness, and the common
+interface had to adapt for each individual scenario. In particular
+Noosfero did not yet have a responsive design; we engaged in its
+development and contributed towards that goal.
+
+After the initial release of the new SPB Portal in 2014, several
+validations activities were implemented in 2015 and 2016. The aim was to
+provide the most wanted features by casual users (such as public
+servants interested in downloads and documentation) immediately, while
+allowing more experienced users (such as developers) to easily drill down
+to the details.
@@ -0,0 +1,13 @@
+\section{Final remarks}
+
+The portal is available at \url{softwarepublico.gov.br}. All
+documentation, including detailed architecture and operation manuals are
+also available\footnote{\url{https://softwarepublico.gov.br/doc/}
+(in Portuguese only at the moment)}).
+%
+All the integrated tools are FOSS and our contributions were published
+in open repositories, available on the SPB Portal itself. We also
+contributed these features back to the respective communities: that
+benefits those communities, as well as us since we can share future
+development and maintenance effort with other organizations that
+participate in their projects.
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+% CHI Extended Abstracts template.
+%
+% Tested with a clean LaTeX installation on Windows XP, Ubuntu 9.04
+% and above (should work in normal LaTeX environments)
+% 
+% Filename: sigchi-ext.cls
+% 
+% Features:
+%   - simpler design, two 'real' columns, better handling of
+%     footnotes/marginal notes
+%   - adheres to ACM archival format, so you don't need to change your
+%     LaTeX markup significantly from other ACM templates
+%   - font sizes, spacing between paragraphs, and look&feel more
+%     according to CHI's Ext. Abstracts template (MS Word)
+%   - supports an optional ACM teaser image on first page
+%   - improved PDF bookmarking
+%  
+% CHANGELOG:
+%   2015-03-21   David A. Shamma    Removed bibsty dependency.
+%   2015-01-05   David A. Shamma    Updating for new format and Github repo.
+%   2013-07-22   Paul Baumann       Added example copyright to LaTeX file.
+%   2010-12-01   Luis A. Leiva      A lot of refactorization.
+%   2010-10-18   Manas Tungare      Restored support for \figures.
+%   2010-08-09   Manas Tungare      Updated copyright info for CHI 2011
+%   2009-12-04   Stephen Voida      Updated copyright info for CHI 2010
+%   2009-11-17   Manas Tungare      Refactored the title & author sections.
+%   2008-11-25   Manas Tungare      Initial create.
+% 
+%   LICENSE: Public domain: You are free to do whatever you want with
+%   this template.  If you improve this in any way, please submit a
+%   pull request to the Github repository.
+
+
+\NeedsTeXFormat{LaTeX2e}[1995/12/01]
+\ProvidesClass{sigchi-ext}[2015/1/05, David A. Shamma]
+
+\typeout{CHI Extended Abstracts template}
+\typeout{- updated by David A. Shamma.}
+\typeout{- refactored by Luis A. Leiva}
+\typeout{- original by Manas Tungare}
+\typeout{}
+\typeout{Available at https://github.com/sigchi.}
+\typeout{}
+
+\LoadClass[10pt,letterpaper,landscape]{article}[1996/10/31]
+
+% -----------------------------------------------------------------------------
+% Set paper and margin sizes
+
+\setlength{\paperheight}{8.5in}
+\setlength{\paperwidth}{11in}
+
+\setlength{\textwidth}{7.25in}
+\setlength{\textheight}{6in}
+
+\setlength{\oddsidemargin}{1.5in}
+\setlength{\topmargin}{0.25in}
+
+\setlength{\columnsep}{0.5in}
+
+\setlength{\voffset}{-0.2in}
+
+\setlength{\parindent}{0pt}
+\setlength{\footskip}{0.5in}
+
+\setlength{\marginparsep}{15pt}
+\setlength{\marginparwidth}{1.8in}
+
+\setlength{\itemsep}{0pt}
+\setlength{\parsep}{0pt}
+\setlength{\topsep}{0pt}
+\setlength{\parskip}{9pt}
+
+% -----------------------------------------------------------------------------
+% Set paper columns and avoid justifying text, according to CHI's MS
+% Word template
+\twocolumn
+\raggedright
+
+% Use LaTeX standard sans-serif fonts
+\renewcommand*\familydefault{\sfdefault}
+
+% -----------------------------------------------------------------------------
+% Allowed environments and commands
+
+%% Todo: fix the floats! This overrides floating images, which is
+%% needed for marginpar images but not for inline.  So the trade off
+%% is to make actual floats work then make a new environment for
+%% marginepar images. -ayman
+% \renewenvironment{table}{\def\@captype{table}}{}
+% \renewenvironment{figure}{\def\@captype{figure}}{}
+\renewcommand{\thanks}[1]{} % No thanks in this template
+\pagestyle{empty} % No page numbers
+
+% -----------------------------------------------------------------------------
+% Paper Metadata
+
+\newcommand*{\copyrightinfo}[1]{\gdef\@copyrightinfo{\raggedright#1}}
+
+% Allow to copy-paste the ACM bibstrip in the Permission Release Form.
+\RequirePackage{acmcopyright}
+% Define the required commands.
+\newcommand*{\CopyrightYear}[1]{} % Actually not used, but needed for consistency
+\newcommand*{\acmPrice}[1]{}      % Actually not used, but needed for consistency
+\newcommand*{\conferenceinfo}[2]{\gdef\@crconferenceinfo{\emph{#1}, #2}}
+\newcommand*{\isbn}[1]{\gdef\@crisbn{ACM~#1.}}
+\newcommand*{\doi}[1]{\gdef\@crdoi{\urlstyle{crc}\url{#1}}}
+% The follwing command typesets the required ACM bibstrip.
+% It must be invoked between \begin{document} and \maketitle, either after or before CCS codes.
+% So just use \copyrightinfo{\acmcopyright} to override the manual copyright info.
+\newcommand*{\acmcopyright}{
+  \@copyrightpermission\par\smallskip
+  \@copyrightowner\par
+  \@crconferenceinfo\par
+  \@crisbn\par
+  \@crdoi
+}
+
+\def\keywords{
+\section*{Author Keywords}
+}
+
+\def\terms{
+\section*{General Terms}
+}
+
+% -----------------------------------------------------------------------------
+% ACM Classification - Gerry/Georgia November 2nd. 1999
+
+\newcount\catcount
+\global\catcount=1
+
+\def\category#1#2#3{%
+\ifnum\catcount=1
+  \section*{ACM Classification Keywords}
+  \advance\catcount by 1\else{\unskip; }%
+\fi
+\@ifnextchar [{\@category{#1}{#2}{#3}}{\@category{#1}{#2}{#3}[]}%
+}
+
+\def\@category#1#2#3[#4]{%
+  \begingroup
+    \let\and\relax
+%    #1 [\textbf{#2}]%
+    #1 [#2]% 
+    \if!#4!%
+      \if!#3!\else : #3\fi
+    \else
+     :\space
+     \if!#3!\else #3\kern\z@---\hskip\z@\fi
+     \textit{#4}%
+    \fi
+  \endgroup
+}
+
+% -----------------------------------------------------------------------------
+% Typeset titles of chapters and sections in sans-serif
+
+\def\@makeschapterhead#1{
+  \vspace*{50\p@}
+  {\parindent \z@ \raggedright
+    \sffamily
+    \interlinepenalty\@M
+    \Huge\bfseries #1\par\nobreak
+    \vskip 20\p@
+  }
+}
+
+\def\sectionsindent{\z@}
+\def\sectionsbeforeskip{-3.5ex \@plus -0.1ex \@minus -0.2ex}
+\def\sectionsafterskip{0.2ex \@plus 0.01ex}
+% LaTeX scheme is {name}{level}{indent}{beforeskip}{afterskip}{style}
+\renewcommand\section{
+  \@startsection{section}{1}{\sectionsindent}{\sectionsbeforeskip}{\sectionsafterskip}%
+  {\sffamily\large\bfseries\phantomsection}
+}
+\renewcommand\subsection{
+  \@startsection{subsection}{2}{\sectionsindent}{\sectionsbeforeskip}{\sectionsafterskip}%
+  {\sffamily\normalsize\itshape\phantomsection}
+}
+\renewcommand\subsubsection{
+  \@startsection{subsubsection}{3}{\sectionsindent}{\sectionsbeforeskip}{\sectionsafterskip}%
+  %{\sffamily\MakeUppercase\small\itshape\phantomsection}
+  {\sffamily\normalsize\itshape\phantomsection}
+}
+     
+% Now remove vertical space after sections (same as class' font size)
+\usepackage[compact]{titlesec}
+\titlespacing{\section}{0pt}{*0}{-9pt}
+\titlespacing{\subsection}{0pt}{*0}{-9pt}
+\titlespacing{\subsubsection}{0pt}{*0}{-9pt}                              
+
+% Add references to TOC
+\let\myrefname\refname
+\renewcommand\refname{\addcontentsline{toc}{section}{\myrefname}\myrefname}
+
+% Typeset captions
+\usepackage[small,bf,sf]{caption}
+\captionsetup{font={small,sf},textfont=sf,justification=raggedright}
+
+% Typeset URLs
+\usepackage{url}
+% Define a (compact) global style for URLs, rather than the default one
+% \def\url@leostyle{\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\small\bf\ttfamily}}}
+\def\url@leostyle{\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\small\sffamily}}}
+\def\url@crcstyle{\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\scriptsize\sffamily}}}
+\urlstyle{leo}
+
+%% Fix Hypenation - to restore hyphenation we need this package. 
+%% https://twitter.com/anjirokhan/status/546046683331973120
+\usepackage{ragged2e}
+
+\usepackage{enumitem}
+
+% Set footones ALWAYS at the bottom of the pages
+\usepackage[bottom]{footmisc}
+
+% Optionally save space in lists (place this command after a list environment (e.g., itemize, enumerate, description)
+\newcommand{\compresslist}{
+  \vspace{-1em}
+  \setlength{\itemsep}{1pt}
+  \setlength{\parskip}{0pt}
+  \setlength{\parsep}{0pt}
+}
+
+% -----------------------------------------------------------------------------
+% Hyperref for fancy typesetting, PDF metadata, and PDF bookmarks
+\RequirePackage{color}
+\definecolor{linkColor}{RGB}{6,125,233}
+\RequirePackage[
+  colorlinks,
+  citecolor=black,
+  linkcolor=black,
+  menucolor=black,
+  urlcolor=linkColor, 
+  linktocpage,
+  naturalnames,
+  plainpages,
+  breaklinks=true,
+  bookmarksnumbered,
+  pdfstartview={FitH},
+  final
+]{hyperref}
+
+% Numbering is not allowed for any {sub{sub}}sections
+\setcounter{secnumdepth}{-1}
+
+% -----------------------------------------------------------------------------
+% Text enhancements
+
+\doublehyphendemerits=9999        % No consecutive line hyphens
+\brokenpenalty=9999               % No broken words across pages
+\widowpenalty=9999                % Almost no widows at bottom of page
+\clubpenalty=9999                 % Almost no orphans at top of page
+\interfootnotelinepenalty=9999    % Almost never break footnotes
+
+% -----------------------------------------------------------------------------
+% Allow placing an optional teaser image below author(s) name
+
+\newcommand{\acm@empty}{}
+\newcommand{\acm@teaser}{}
+\newcommand{\teaser}[1]{\renewcommand{\acm@teaser}{#1}}
+
+% -----------------------------------------------------------------------------
+% Authors handling
+
+\gdef\numberofauthors#1{}
+\newcommand{\alignauthor}[1]{%
+  \parbox[t]{0.5\linewidth}{\raggedright#1}%
+}
+\newcommand{\affaddr}[1]{#1}
+\newcommand{\email}[1]{#1}
+
+% -----------------------------------------------------------------------------
+% Typeset first page
+
+\renewcommand{\maketitle}{
+  % allocate paper title
+  \begin{minipage}[t]{0.19\textwidth}\mbox{}\end{minipage}%
+  \begin{minipage}[b]{0.81\textwidth}
+    \rule{1.03\textwidth}{3pt}
+  	\renewcommand\baselinestretch{0.75}
+    \usefont{OT1}{phv}{bc}{n}\selectfont
+    \raggedright\Huge\bfseries\@title\par
+  \end{minipage}
+
+  \vfil
+
+  % allocate authors, optional teaser, ...
+%  \begin{minipage}[b][0.74\textheight][b]{\linewidth}
+%  \begin{minipage}[t][0.2\textheight][t]{\linewidth}\mbox{}\end{minipage}
+  \begin{minipage}[t][0.76\textheight][t]{\linewidth}
+    \ifx\acm@teaser\acm@empty 
+      \begin{minipage}[t][0.5\textheight][t]{\linewidth}{\small\@author}\end{minipage}
+    \else
+      \small\@author\par
+      \vfill
+      \begingroup
+        \def\@captype{figure}
+        \acm@teaser
+      \endgroup\par
+    \fi
+
+    \vfil
+    
+    % ... and ACM copyright
+    \rule{\columnwidth}{0.5pt}
+    {\scriptsize\@copyrightinfo \\}
+  \end{minipage}
+
+  % avoid title overlapping with abstract 
+  \begin{minipage}[t][0.2\textheight][t]{\linewidth}\mbox{}\end{minipage}
+}
+
+% -----------------------------------------------------------------------------
+% Default copyright strip
+\copyrightinfo{Paste the appropriate copyright statement here. ACM
+  now supports three different copyright statements:
+  \begin{itemize}[noitemsep,topsep=0pt,parsep=0pt,partopsep=0pt]
+  \item ACM copyright: ACM holds the copyright on the work. This is
+    the historical approach.
+  \item License: The author(s) retain copyright, but ACM receives an
+    exclusive publication license.
+  \item Open Access: The author(s) wish to pay for the work to be open
+    access. The additional fee must be paid to ACM.
+  \end{itemize}
+  This text field is large enough to hold the appropriate release
+  statement assuming it is single spaced in a sans-serif 7 point
+  font. \\ \textcolor{red}{Every submission will be assigned their own
+    unique DOI string to be included here.}}
+
+% -----------------------------------------------------------------------------
+% Including bibspacing.sty inline from http://bit.ly/1vlKdb0
+
+% \newdimen\bibindent
+% \setlength\bibindent{1.5em}
+% \newdimen\bibspacing
+% \setlength\bibspacing\z@
+% \renewenvironment{thebibliography}[1]{%
+%   \section*{\refname
+%         \@mkboth{\MakeUppercase\refname}{\MakeUppercase\refname}}%
+%       \list{\@biblabel{\@arabic\c@enumiv}}%
+%            {\settowidth\labelwidth{\@biblabel{#1}}%
+%             \leftmargin\labelwidth
+%             \advance\leftmargin\labelsep 
+%             \itemsep\z@skip    % should this be commented out?
+%             \parsep\z@skip     % should this be commented out?
+%             \@openbib@code
+%             \usecounter{enumiv}%
+%             \let\p@enumiv\@empty
+%             \renewcommand\theenumiv{\@arabic\c@enumiv}}%
+%       \sloppy\clubpenalty4000\widowpenalty4000%
+%       \sfcode`\.\@m}
+%      {\def\@noitemerr
+%        {\@latex@warning{Empty `thebibliography' environment}}%
+%       \endlist}
+
+%% https://code.google.com/p/tufte-latex/source/browse/tufte-common.def
+
+% Paragraph indentation and separation for marginal text
+\newcommand{\@tufte@margin@par}{%
+  \setlength{\RaggedRightParindent}{0.5pc}%
+  \setlength{\JustifyingParindent}{0.5pc}%
+  \setlength{\parindent}{0.5pc}%
+  \setlength{\parskip}{0pt}%
+}
+
+%%
+% The placeins package provides the \FloatBarrier command.  This forces
+% LaTeX to place all of the floats before proceeding.  We'll use this to
+% keep the float (figure and table) numbers in sequence.
+\RequirePackage{placeins}
+
+%%
+% Margin float environment
+
+\newsavebox{\@tufte@margin@floatbox}
+\newenvironment{@tufte@margin@float}[2][-1.2ex]%
+  {\FloatBarrier% process all floats before this point so the figure/table numbers stay in order.
+  \begin{lrbox}{\@tufte@margin@floatbox}%
+  \begin{minipage}{\marginparwidth}%
+    %% \@tufte@caption@font%
+    \def\@captype{#2}%
+    \hbox{}\vspace*{#1}%
+    %% \@tufte@caption@justification%
+    \@tufte@margin@par%
+    \noindent%
+  }
+  {\end{minipage}%
+  \end{lrbox}%
+  \marginpar{\usebox{\@tufte@margin@floatbox}}%
+  }
+
+
+%%
+% Margin figure environment
+
+\newenvironment{marginfigure}[1][-1.2ex]%
+  {\begin{@tufte@margin@float}[#1]{figure}}
+  {\end{@tufte@margin@float}}
+
+
+%%
+% Margin table environment
+
+\newenvironment{margintable}[1][-1.2ex]%
+  {\begin{@tufte@margin@float}[#1]{table}}
+  {\end{@tufte@margin@float}}
+
+%%
+% Auto-detects the proper text alignment based on the various class options
+
+\newcommand*{\@tufte@justification@autodetect}{%
+  \ifthenelse{\boolean{@tufte@justified}}%
+    {\justifying}%
+    {\RaggedRight}%
+}
+
+%%
+% Forces the outer edge of the caption to be set ragged.  
+% Therefore, on verso pages it's ragged left, and on recto pages it's ragged right.
+
+\newcommand*{\@tufte@justification@caption@outer}{%
+  \ifthenelse{\boolean{@tufte@float@recto}}%
+    {\RaggedRight}%
+    {\RaggedLeft}%
+}
+
+\newcommand*{\@tufte@justification@outer}{%
+  \@tufte@checkoddpage%
+  \ifthenelse{\boolean{@tufte@odd@page}}%
+    {\RaggedRight}%
+    {\RaggedLeft}%
+}
+
+%% 
+% For the CCSXML 2012 Categories
+
+\let\@concepts\@empty
+% Support for CCSXML file
+\RequirePackage{comment}
+\excludecomment{CCSXML}
+
+% New concepts scheme
+%
+% The first argument is the significance, the
+% second is the concept(s)
+%
+\newcommand\ccsdesc[2][100]{%
+  \ccsdesc@parse#1~#2~}
+%
+% The parser of the expression Significance~General~Specific
+%
+\def\ccsdesc@parse#1~#2~#3~{%
+  \expandafter\ifx\csname CCS@#2\endcsname\relax
+    \expandafter\gdef\csname CCS@#2\endcsname{\textbullet\textbf{#2} $\to$ }%
+  \g@addto@macro{\@concepts}{\csname CCS@#2\endcsname}\fi
+  \expandafter\g@addto@macro\expandafter{\csname CCS@#2\endcsname}{%
+    \ifnum#1>499\textbf{#3; }\else
+    \ifnum#1>299\textit{#3; }\else
+    #3; \fi\fi}}
+
+\newcommand\printccsdesc{%
+  \ifx\@concepts\@empty\else
+  \if@twocolumn
+    \section*{CCS Concepts}
+    \@concepts
+    \else \small
+    \quotation{\@concepts}%
+    \fi
+    \fi}
+
+%%
+% Pulling in citation formatting from `sigchi.cls' file.
+
+\parindent 0pt
+\typeout{Using 'Abbrev' bibliography style}
+\newcommand\bibyear[2]{%
+    \unskip\quad\ignorespaces#1\unskip
+    \if#2..\quad \else \quad#2 \fi
+}
+\newcommand{\bibemph}[1]{{\em#1}}
+\newcommand{\bibemphic}[1]{{\em#1\/}}
+\newcommand{\bibsc}[1]{{\sc#1}}
+\def\@normalcite{%
+    \def\@cite##1##2{[##1\if@tempswa , ##2\fi]}%
+}
+\def\@citeNB{%
+    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
+}
+\def\@citeRB{%
+    \def\@cite##1##2{##1\if@tempswa , ##2\fi]}%
+}
+\def\start@cite#1#2{%
+    \edef\citeauthoryear##1##2##3{%
+        ###1%
+        \ifnum#2=\z@ \else\ ###2\fi
+    }%
+    \ifnum#1=\thr@@
+        \let\@@cite\@citeyear
+    \else
+        \let\@@cite\@citenormal
+    \fi
+    \@ifstar{\@citeNB\@@cite}{\@normalcite\@@cite}%
+}
+\def\cite{\start@cite23}
+\def\citeNP{\cite*}
+\def\citeA{\start@cite10}
+\def\citeANP{\citeA*}
+\def\shortcite{\start@cite23}
+\def\shortciteNP{\shortcite*}
+\def\shortciteA{\start@cite20}
+\def\shortciteANP{\shortciteA*}
+\def\citeyear{\start@cite30}
+\def\citeyearNP{\citeyear*}
+\def\citeN{%
+    \@citeRB
+    \def\citeauthoryear##1##2##3{##1\ [##3%
+        \def\reserved@a{##1}%
+        \def\citeauthoryear####1####2####3{%
+            \def\reserved@b{####1}%
+            \ifx\reserved@a\reserved@b
+                ####3%
+            \else
+                \errmessage{Package acmart Error: author mismatch
+                         in \string\citeN^^J^^J%
+                    See the acmart package documentation for explanation}%
+            \fi
+        }%
+    }%
+    \@ifstar\@citeyear\@citeyear
+}
+\def\shortciteN{%
+    \@citeRB
+    \def\citeauthoryear##1##2##3{##2\ [##3%
+        \def\reserved@a{##2}%
+        \def\citeauthoryear####1####2####3{%
+            \def\reserved@b{####2}%
+            \ifx\reserved@a\reserved@b
+                ####3%
+            \else
+                \errmessage{Package acmart Error: author mismatch
+                         in \string\shortciteN^^J^^J%
+                    See the acmart package documentation for explanation}%
+            \fi
+        }%
+    }%
+    \@ifstar\@citeyear\@citeyear % changed from  "\@ifstart" 12 Jan 2000 gkmt
+}
+
+    \def\@citenormal{%
+    \@ifnextchar [{\@tempswatrue\@citex;}
+                  {\@tempswafalse\@citex[]}% GERRY FIX FOR BABEL 3/20/2009
+}
+\def\@citeyear{%
+    \@ifnextchar [{\@tempswatrue\@citex,}%
+                  {\@tempswafalse\@citex[]}% GERRY FIX FOR BABEL 3/20/2009
+}
+\def\@citex#1[#2]#3{%
+    \let\@citea\@empty
+    \@cite{%
+        \@for\@citeb:=#3\do{%
+            \@citea
+            \def\@citea{#1, }% 	% GERRY FIX FOR BABEL 3/20/2009 -- SO THAT YOU GET [1, 2] IN THE BODY TEXT
+            \edef\@citeb{\expandafter\@iden\@citeb}%
+            \if@filesw
+                \immediate\write\@auxout{\string\citation{\@citeb}}%
+            \fi
+            \@ifundefined{b@\@citeb}{%
+                {\bf ?}%
+                \@warning{%
+                    Citation `\@citeb' on page \thepage\space undefined%
+                }%
+            }%
+            {\csname b@\@citeb\endcsname}%
+        }%
+    }{#2}%
+}
+\let\@biblabel\@gobble
+\newdimen\bibindent
+\bibindent=0em
+\newskip\bibsep % [jdf] allow bib space tweaking
+\bibsep 2pt \@plus 1pt \@minus 1pt % [jdf] initial spacing between ref entries
+\setcounter{enumi}{1}
+\def\thebibliography#1{%
+%% Comment this to have blue DOI links.
+\makeatletter
+\def\url@leostyle{% 
+\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\color{black}\small\bf\ttfamily}}}
+\makeatother
+\urlstyle{leo}
+%%
+    \section{%
+       {REFERENCES}
+        \@mkboth{{\refname}}{{\refname}}%
+    }%
+%    \list{[\arabic{enumi}]}{%
+    \list{\arabic{enumi}.}{% DLC
+%        \settowidth\labelwidth{[#1]}%
+        \settowidth\labelwidth{#1.}% DLC
+        \leftmargin\labelwidth
+        \advance\leftmargin\labelsep
+        \advance\leftmargin\bibindent
+        \itemindent -\bibindent
+        \listparindent \itemindent
+        \usecounter{enumi}
+        \itemsep\bibsep% [jdf] standard spacing between references
+    }%
+    \let\newblock\@empty
+    \raggedright  %% 7 JAN 2000 gkmt
+    \sloppy
+    \sfcode`\.=1000\relax
+}
+
+
+\gdef\balancecolumns
+{\vfill\eject
+\global\@colht=\textheight
+\global\ht\@cclv=\textheight
+}
+
+% That's all folks!
+\endinput
@@ -0,0 +1,1676 @@
+% CHI Proceedings Template.
+%
+% FILENAME: sigchi.cls
+%  
+% SOURCE: See https://github.com/sigchi for latest official version.
+%
+% NOTE: If you wish to edit this document, please list edits properly
+% in the CHANGELOG section and not scattered through the code.
+% 
+% CHANGELOG: 
+%
+% 2015-12-10 Daniel Ashbrook Switch 7-bit fonts to 8-bit
+%
+% 2015-03-21 David A. Shamma Updating for new format and Github
+% repo for CHI 2016.
+%
+% 2014-07-30 Scooter Morris Updated to add DOI text to copyright
+% footer
+%
+% 2011-10-19 DanCo Added \sloppy to reduce overfull lines per Sheridan
+%
+% 2011-08-28 Jean-Daniel Fekete Re-added flushleft in \terms &
+% \category, added compatibility for the caption package
+%
+% 2006 Andrew Duchowski Updated the metafont names to use more
+% modern Berry font naming schemes.
+%
+% 2002-07-30 JS/GM Fix to vertical spacing before Proofs
+%
+% 2002-07-29 Georgia Fixed bug in sub-sub-section numbering in
+% paragraphs
+%
+% 1999-09-11 Gerry Murry Allowance Made to switch default fonts
+% between those systems using METAFONT and those using 'Type 1' or
+% 'Truetype' fonts.  See LINE NUMBER 266 for details.  Also provided
+% for enumerated/annotated Corollaries 'surrounded' by enumerated
+% Theorems (line 838).
+%
+% Modified from ACM_PROC_ARTICLE-SP DOCUMENT STYLE by G.K.M. Tobin
+% August-October 1999.  Adapted from ARTICLE document style by Ken
+% Traub, Olin Shivers also using elements of esub2acm.cls.  Modified
+% from ARTICLE DOCUMENT STYLE -- Released 16 March 1988 for LaTeX
+% version 2.09 by Leslie Lamport, 16 March 1988.
+% 
+% MISC: 
+%
+% Fixed the format to match the Word template and added a \teaser
+% command to add a teaser image.
+%
+% Made the Permission Statement / Conference Info / Copyright Info
+% 'user definable' in the source .tex file OR automatic if not
+% specified.  This 'sp' version does NOT produce the permission block.
+%
+% Major change in January 2000 was to include a "blank line" in
+% between new paragraphs. This involved major changes to the, then,
+% acmproc-sp.cls 1.0SP file, precipitating a 'new' name:
+% "acm_proc_article-sp.cls" V2.01SP.  Footnotes inside table cells
+% using \minipage (Oct. 2002)
+%
+% LICENSE: Public domain: You are free to do whatever you want with
+% this template.  If you improve this in any way, please submit a
+% pull request to the Github repository.
+%
+% ---- Start of example  ----
+%
+% \documentclass{sigchi}
+% \usepackage{times}
+% \pagenumbering{arabic} % Arabic page numbers for submission.  
+%                        % Remove this line to eliminate page numbers  
+%                        % for the camera ready copy
+% \title{The Title}
+% \numberofauthors{2}
+% \author{
+%   \alignauthor Author 1
+%     \affaddr{Affiliation}\\
+%     \affaddr{Affiliation}\\
+%     \email{author@a.com}
+%   \alignauthor Author 2
+%     \affaddr{Affiliation}\\
+%     \affaddr{Affiliation}\\
+%     \email{author2@b.com}
+% }
+%
+%\begin{document}
+%\maketitle
+%\abstract{This is the abstract}
+%\keywords{Put author keywords here}
+%\classification{The ACM Classification keywords here.}
+%
+%\section{Introduction}
+% ...
+%
+% ---- End of example  ----
+%
+% For the ACM Tracking Purposes
+\def\fileversion{V0.20}
+\def\filedate{March 21, 2015}
+\def\docdate {\filedate}
+% Packages
+\usepackage{epsfig}
+\usepackage{amssymb}
+\usepackage{amsmath}
+\usepackage{amsfonts}
+%%% ACM_PROC_ARTICLE-SP is a document style for producing two-column camera-ready pages for
+%%% ACM conferences, according to ACM specifications.  The main features of
+%%% this style are:
+%%%
+%%% 1)  Two columns.
+%%% 2)  Side and top margins of 4.5pc, bottom margin of 6pc, column gutter of
+%%%     2pc, hence columns are 20pc wide and 55.5pc tall.  (6pc =3D 1in, approx)
+%%% 3)  First page has title information, and an extra 6pc of space at the
+%%%     bottom of the first column for the ACM copyright notice.
+%%% 4)  Text is 9pt on 10pt baselines; titles (except main) are 9pt bold.
+%%%
+%%%
+%%% There are a few restrictions you must observe:
+%%%
+%%% 1)  You cannot change the font size; ACM wants you to use 9pt.
+%%% 3)  You must start your paper with the \maketitle command.  Prior to the
+%%%     \maketitle you must have \title and \author commands.  If you have a
+%%%     \date command it will be ignored; no date appears on the paper, since
+%%%     the proceedings will have a date on the front cover.
+%%% 4)  Marginal paragraphs, tables of contents, lists of figures and tables,
+%%%     and page headings are all forbidden.
+%%% 5)  The `figure' environment will produce a figure one column wide; if you
+%%%     want one that is two columns wide, use `figure*'.
+%%%
+%
+%%% Copyright Space:
+%%% This style automatically leaves 1" blank space at the bottom of page 1/
+%%% column 1.  This space can optionally be filled with some text using the
+%%% \toappear{...} command.  If used, this command must be BEFORE the \maketitle
+%%% command.  If this command is defined AND [preprint] is on, then the
+%%% space is filled with the {...} text (at the bottom); otherwise, it is
+%%% blank.  If you use \toappearbox{...} instead of \toappear{...} then a
+%%% box will be drawn around the text (if [preprint] is on).
+%%%
+%%% A typical usage looks like this:
+%%%     \toappear{To appear in the Ninth AES Conference on Medievil Lithuanian
+%%%               Embalming Technique, June 1991, Alfaretta, Georgia.}
+%%% This will be included in the preprint, and left out of the conference
+%%% version.
+%%%
+%%% WARNING:
+%%% Some dvi-ps converters heuristically allow chars to drift from their
+%%% true positions a few pixels. This may be noticeable with the 9pt sans-serif
+%%% bold font used for section headers.
+%%% You may turn this hackery off via the -e option:
+%%%     dvips -e 0 foo.dvi >foo.ps
+%%%
+
+\typeout{}
+
+\typeout{Document Class SIGCHI}
+
+\typeout{Available at https://github.com/sigchi.}
+
+\typeout{}
+
+\typeout{- <May 11, 2016> Updated by Florian Heller to accept ACM copyright commands.}
+
+\typeout{- <March 21, 2015> Updated by David A. Shamma for CHI 2016.}
+
+\typeout{- <July 30, 2014> Updated for for 2014 by William Hudson and
+  Jean-Daniel Fekete.}
+
+\typeout{- <October 19, 2010> Updated for 2011 by Manas Tungare.}
+
+\typeout{Shamelessly copied from}
+
+\typeout{- <September 7, 2000> Modified by Jan O. Borchers from
+  `chiproceedings'}
+
+\typeout{- <October 2, 2002> Modified by G.K.M. Tobin from
+  `acm_proc_article-sp'}
+
+\typeout{- <May 22, 1989> Hacked from `acmconf' 4/91 by
+  shivers@cs.cmu.edu, 4/93 by theobald@cs.mcgill.ca}
+
+\typeout{Excerpts were taken from (Journal Style) 'esub2acm.cls'.}
+
+\typeout{}
+
+% Options taken from ACM LaTeX template. FH, May 11 2016
+% New option code by BV
+
+\newcount\ACM@basesize
+\ACM@basesize=9\relax
+\DeclareOption{9pt}{\ACM@basesize=9\relax}
+\DeclareOption{10pt}{\ACM@basesize=10\relax}
+\DeclareOption{11pt}{\ClassError{sig-alternate}{The `11pt' option is
+    not allowed}{sig-alternate now exists in 9pt and 10pt versions only}}
+\DeclareOption{12pt}{\ClassError{sig-alternate}{The `12pt' option is
+    not allowed}{sig-alternate now exists in 9pt and 10pt versions only}}
+
+\ExecuteOptions{9pt}
+\ProcessOptions
+
+\def\doi#1{\def\@doi{#1}}
+\doi{http://dx.doi.org/10.1145/0000000.0000000}
+
+\let\@concepts\@empty
+
+
+\oddsidemargin 1.9025cm            % [jdf] stick to CHI Formating Guidelines
+\evensidemargin 1.9025cm           % [jdf] idem
+\advance\oddsidemargin by -1in  % Correct for LaTeX gratuitousness
+\advance\evensidemargin by -1in % Correct for LaTeX gratuitousness
+\marginparwidth 0pt             % Margin pars are not allowed.
+\marginparsep 11pt              % Horizontal space between outer margin and
+                                % marginal note
+
+                                % Top of page:
+\topmargin 2.2cm                % [jdf] stick to CHI Formating Guidelines
+%\topmargin 6.5pc                % Nominal distance from top of page to top of  % 00-09-07 job (for A4)
+                                % box containing running head.
+\advance\topmargin by -1in      % Correct for LaTeX gratuitousness
+\headheight 0pt                 % Height of box containing running head.
+\headsep 0pt                    % Space between running head and text.
+                                % Bottom of page:
+\footskip 30pt                  % Distance from baseline of box containing foot
+                                % to baseline of last line of text.
+\@ifundefined{footheight}{\newdimen\footheight}{}% this is for LaTeX2e
+\footheight 12pt                % Height of box containing running foot.
+
+
+%% Must redefine the top margin so there's room for headers and
+%% page numbers if you are using the preprint option. Footers
+%% are OK as is. Olin.
+\advance\topmargin by -37pt     % Leave 37pt above text for headers
+\headheight 12pt                % Height of box containing running head.
+\headsep 25pt                   % Space between running head and text.
+
+\textheight 23cm        % [jdf] stick to CHI Formating Guidelines
+\textwidth 18cm         % [jdf] stick to CHI Formating Guidelines
+                        % For two-column mode:
+\columnsep 8.5mm        % [jdf] stick to CHI Formating Guidelines
+\columnseprule 0pt      %    Width of rule between columns.
+\hfuzz 1pt              % Allow some variation in column width, otherwise it's
+                        % too hard to typeset in narrow columns.
+
+\footnotesep 5.6pt      % Height of strut placed at the beginning of every
+                        % footnote =3D height of normal \footnotesize strut,
+                        % so no extra space between footnotes.
+
+\skip\footins 8.1pt plus 4pt minus 2pt  % Space between last line of text and
+                                        % top of first footnote.
+\floatsep 11pt plus 2pt minus 2pt       % Space between adjacent floats moved
+                                        % to top or bottom of text page.
+\textfloatsep 18pt plus 2pt minus 4pt   % Space between main text and floats
+                                        % at top or bottom of page.
+\intextsep 11pt plus 2pt minus 2pt      % Space between in-text figures and
+                                        % text.
+\@ifundefined{@maxsep}{\newdimen\@maxsep}{}% this is for LaTeX2e
+\@maxsep 18pt                           % The maximum of \floatsep,
+                                        % \textfloatsep and \intextsep (minus
+                                        % the stretch and shrink).
+\dblfloatsep 11pt plus 2pt minus 2pt    % Same as \floatsep for double-column
+                                        % figures in two-column mode.
+\dbltextfloatsep 18pt plus 2pt minus 4pt% \textfloatsep for double-column
+                                        % floats.
+\@ifundefined{@dblmaxsep}{\newdimen\@dblmaxsep}{}% this is for LaTeX2e
+\@dblmaxsep 18pt                        % The maximum of \dblfloatsep and
+                                        % \dbltexfloatsep.
+\@fptop 0pt plus 1fil    % Stretch at top of float page/column. (Must be
+                         % 0pt plus ...)
+\@fpsep 8pt plus 2fil    % Space between floats on float page/column.
+\@fpbot 0pt plus 1fil    % Stretch at bottom of float page/column. (Must be
+                         % 0pt plus ... )
+\@dblfptop 0pt plus 1fil % Stretch at top of float page. (Must be 0pt plus ...)
+\@dblfpsep 8pt plus 2fil % Space between floats on float page.
+\@dblfpbot 0pt plus 1fil % Stretch at bottom of float page. (Must be
+                         % 0pt plus ... )
+\marginparpush 5pt       % Minimum vertical separation between two marginal
+                         % notes.
+
+\parskip 0pt                % Extra vertical space between paragraphs.
+                    % Set to 0pt outside sections, to keep section heads
+                    % uniformly spaced.  The value of parskip is set
+                    % to leading value _within_ sections.
+                    % 12 Jan 2000 gkmt
+\parindent 0pt                % Width of paragraph indentation.
+%\partopsep 2pt plus 1pt minus 1pt% Extra vertical space, in addition to
+                                 % \parskip and \topsep, added when user
+                                 % leaves blank line before environment.
+\partopsep 0pt                   % 00-09-07 job
+
+\doublehyphendemerits=9999        % No consecutive line hyphens
+\brokenpenalty=9999               % No broken words across pages
+\widowpenalty=9999                % Almost no widows at bottom of page
+\clubpenalty=9999                 % Almost no orphans at top of page
+\interfootnotelinepenalty=9999    % Almost never break footnotes
+
+\@lowpenalty   51       % Produced by \nopagebreak[1] or \nolinebreak[1]
+\@medpenalty  151       % Produced by \nopagebreak[2] or \nolinebreak[2]
+\@highpenalty 301       % Produced by \nopagebreak[3] or \nolinebreak[3]
+
+\@beginparpenalty -\@lowpenalty % Before a list or paragraph environment.
+\@endparpenalty   -\@lowpenalty % After a list or paragraph environment.
+\@itempenalty     -\@lowpenalty % Between list items.
+
+\@namedef{ds@10pt}{\@latexerr{The `10pt' option is not allowed in the `acmconf'
+  document style.}\@eha}
+\@namedef{ds@11pt}{\@latexerr{The `11pt' option is not allowed in the `acmconf'
+  document style.}\@eha}
+\@namedef{ds@12pt}{\@latexerr{The `12pt' option is not allowed in the `acmconf'
+  document style.}\@eha}
+
+\@options
+
+\lineskip 2pt           % \lineskip is 1pt for all font sizes.
+\normallineskip 2pt
+\def\baselinestretch{1}
+
+\abovedisplayskip 9pt plus2pt minus4.5pt%
+\belowdisplayskip \abovedisplayskip
+\abovedisplayshortskip  \z@ plus3pt%
+\belowdisplayshortskip  5.4pt plus3pt minus3pt%
+\let\@listi\@listI     % Setting of \@listi added 9 Jun 87
+
+\def\small{\@setsize\small{9pt}\viiipt\@viiipt
+\abovedisplayskip 7.6pt plus 3pt minus 4pt%
+\belowdisplayskip \abovedisplayskip
+\abovedisplayshortskip \z@ plus2pt%
+\belowdisplayshortskip 3.6pt plus2pt minus 2pt
+\def\@listi{\leftmargin\leftmargini %% Added 22 Dec 87
+\topsep 4pt plus 2pt minus 2pt\parsep 2pt plus 1pt minus 1pt
+\itemsep \parsep}}
+
+\def\footnotesize{\@setsize\footnotesize{9pt}\ixpt\@ixpt
+\abovedisplayskip 6.4pt plus 2pt minus 4pt%
+\belowdisplayskip \abovedisplayskip
+\abovedisplayshortskip \z@ plus 1pt%
+\belowdisplayshortskip 2.7pt plus 1pt minus 2pt
+\def\@listi{\leftmargin\leftmargini %% Added 22 Dec 87
+\topsep 3pt plus 1pt minus 1pt\parsep 2pt plus 1pt minus 1pt
+\itemsep \parsep}}
+
+\newcount\aucount
+\newcount\originalaucount
+\newdimen\auwidth
+\auwidth=\textwidth
+\newdimen\auskip
+\newcount\auskipcount
+\newdimen\auskip
+\global\auskip=1pc
+\newdimen\allauboxes
+\allauboxes=\auwidth
+\newtoks\addauthors
+
+\newtoks\subtitletext
+\gdef\subtitle#1{\subtitletext={#1}}
+
+\gdef\additionalauthors#1{\addauthors={#1}}
+
+\gdef\numberofauthors#1{\global\aucount=#1
+\ifnum\aucount>3\global\originalaucount=\aucount \global\aucount=3\fi%
+\global\auskipcount=\aucount\global\advance\auskipcount by -1 % [jdf] fix
+\global\multiply\auskipcount by 2
+\global\multiply\auskip by \auskipcount
+\global\advance\auwidth by -\auskip
+\global\divide\auwidth by \aucount
+\global\advance\auwidth by -5pt} % [jdf] tabular add some horizontal space
+
+% \and was modified to count the number of authors.  GKMT 12 Aug 1999
+\def\alignauthor{%                  % \begin{tabular}
+  \end{tabular} %
+  \hskip 1pt % [jdf] allow break for more than 3 authors
+  \begin{tabular}[t]{p{\auwidth}}%
+    \centering\baselineskip 13pt}% [jdf] added more vertical spacing
+
+%  *** NOTE *** NOTE *** NOTE *** NOTE ***
+%  If you have 'font problems' then you may need
+%  to change these, e.g. 'arialb' instead of "arialbd".
+%  Gerry Murray 11/11/1999
+%  *** OR ** comment out block A and activate block B or vice versa.
+% **********************************************
+%
+%  -- Start of block A -- (Type 1 or Truetype fonts)
+%\newfont{\secfnt}{timesbd at 12pt} % was timenrb originally - now is timesbd
+%\newfont{\secit}{timesbi at 12pt}   %13 Jan 00 gkmt
+%\newfont{\subsecfnt}{timesi at 11pt} % was timenrri originally - now is timesi
+%\newfont{\subsecit}{timesbi at 11pt} % 13 Jan 00 gkmt -- was times changed to timesbi gm 2/4/2000
+%                         % because "normal" is italic, "italic" is Roman
+%\newfont{\ttlfnt}{arialbd at 18pt} % was arialb originally - now is arialbd
+%\newfont{\ttlit}{arialbi at 18pt}    % 13 Jan 00 gkmt
+%\newfont{\subttlfnt}{arial at 14pt} % was arialr originally - now is arial
+%\newfont{\subttlit}{ariali at 14pt} % 13 Jan 00 gkmt
+%\newfont{\subttlbf}{arialbd at 14pt}  % 13 Jan 00 gkmt
+%\newfont{\aufnt}{arial at 12pt} % was arialr originally - now is arial
+%\newfont{\auit}{ariali at 12pt} % 13 Jan 00 gkmt
+%\newfont{\affaddr}{arial at 10pt} % was arialr originally - now is arial
+%\newfont{\affaddrit}{ariali at 10pt} %13 Jan 00 gkmt
+%\newfont{\eaddfnt}{arial at 12pt} % was arialr originally - now is arial
+%\newfont{\ixpt}{times at 9pt} % was timenrr originally - now is times
+%\newfont{\confname}{timesi at 8pt} % was timenrri - now is timesi
+%\newfont{\crnotice}{times at 8pt} % was timenrr originally - now is times
+%\newfont{\ninept}{times at 9pt} % was timenrr originally - now is times
+
+% *********************************************
+%  -- End of block A --
+%
+%
+% -- Start of block B -- METAFONT
+% +++++++++++++++++++++++++++++++++++++++++++++
+% Next (default) block for those using Metafont
+% Gerry Murray 11/11/1999
+% *** THIS BLOCK FOR THOSE USING METAFONT *****
+% *********************************************
+%%\newfont{\secfnt}{ptmb at 12pt}
+%\newfont{\secfnt}{phvb at 9pt}                    % 00-09-07 job
+%%\newfont{\secit}{ptmbi at 12pt}    %13 Jan 00 gkmt
+%\newfont{\secit}{phvbo at 9pt}    %13 Jan 00 gkmt % 00-09-07 job
+%%\newfont{\subsecfnt}{ptmri at 11pt}
+%\newfont{\subsecfnt}{phvro at 9pt}                % 00-09-07 job
+%%\newfont{\subsecit}{ptmbi at 11pt}  % 13 Jan 00 gkmt -- was ptmr changed to ptmbi gm 2/4/2000
+%\newfont{\subsecit}{phvr at 9pt}  % 13 Jan 00 gkmt -- was ptmr changed to ptmbi gm 2/4/2000     % 00-09-07 job
+%                         % because "normal" is italic, "italic" is Roman
+%\newfont{\ttlfnt}{phvb at 18pt}
+%\newfont{\ttlit}{phvbo at 18pt}    % GM 2/4/2000
+%\newfont{\subttlfnt}{phvr at 14pt}
+%\newfont{\subttlit}{phvro at 14pt} % GM 2/4/2000
+%\newfont{\subttlbf}{phvb at 14pt}  % 13 Jan 00 gkmt
+%%\newfont{\aufnt}{phvr at 12pt}
+%\newfont{\aufnt}{ptmb at 12pt}                    % 00-09-07 job
+%%\newfont{\auit}{phvro at 12pt}     % GM 2/4/2000
+%\newfont{\auit}{ptmbo at 12pt}    % GM 2/4/2000   % 00-09-07 job
+%%\newfont{\affaddr}{phvr at 10pt}
+%\newfont{\affaddr}{ptmr at 12pt}                  % 00-09-07 job
+%%\newfont{\affaddrit}{phvro at 10pt} % GM 2/4/2000
+%\newfont{\affaddrit}{ptmro at 12pt} % GM 2/4/2000 % 00-09-07 job
+%%\newfont{\eaddfnt}{phvr at 12pt}
+%\newfont{\eaddfnt}{ptmr at 12pt}                  % 00-09-07 job
+%%\newfont{\ixpt}{ptmr at 9pt}
+%\newfont{\ixpt}{ptmr at 10pt}          % 00-09-07 job
+%\newfont{\confname}{ptmri at 8pt}
+%\newfont{\crnotice}{ptmr at 8pt}
+%%\newfont{\ninept}{ptmr at 9pt}
+%\newfont{\ninept}{ptmr at 10pt}        % 00-09-07 job
+% *********************************************
+%  -- End of block B --
+%
+%
+% -- Start of block C -- METAFONT (modern usage)
+% +++++++++++++++++++++++++++++++++++++++++++++
+% Next (default) block for those using Metafont
+% Andrew Duchowski 06/19/2006
+% *** THIS BLOCK FOR THOSE USING METAFONT *****
+% *********************************************
+% notes: 7t fonts are 7-bit latex, 8t fonts are T1 fonts
+\newfont{\secfnt}{phvb8t at 9pt}
+\newfont{\secit}{phvbo8t at 9pt}
+\newfont{\subsecfnt}{phvro8t at 9pt}
+\newfont{\subsecit}{phvr8t at 9pt}
+\newfont{\ttlfnt}{phvb8t at 18pt}
+\newfont{\ttlit}{phvbo8t at 18pt}
+\newfont{\subttlfnt}{phvr8t at 14pt}
+\newfont{\subttlit}{phvro8t at 14pt}
+\newfont{\subttlbf}{phvb8t at 14pt}
+\newfont{\aufnt}{ptmb8t at 12pt}
+\newfont{\auit}{ptmbo8t at 12pt}
+\newfont{\affaddr}{ptmr8t at 12pt}
+\newfont{\affaddrit}{ptmro8t at 12pt}
+\newfont{\eaddfnt}{ptmr8t at 12pt}
+\newfont{\ixpt}{ptmr8t at 10pt}
+\newfont{\confname}{ptmri8t at 8pt}
+\newfont{\crnotice}{ptmr8t at 8pt}
+\newfont{\ninept}{ptmr8t at 10pt}
+% +++++++++++++++++++++++++++++++++++++++++++++
+% -- End of block C --
+
+%\def\email#1{{{\eaddfnt{\vskip 4pt#1}}}}
+\def\email#1{{{\eaddfnt{#1}}}} % 00-09-07 job
+
+\def\addauthorsection{\ifnum\originalaucount>3
+    \section{Additional Authors}\the\addauthors
+  \fi}
+
+\newcount\savesection
+\newcount\sectioncntr
+\global\sectioncntr=1
+
+\setcounter{secnumdepth}{0}
+
+\def\appendix{\par
+\section*{APPENDIX}
+\setcounter{section}{0}
+ \setcounter{subsection}{0}
+ \def\thesection{\Alph{section}} }
+
+
+%\leftmargini 22.5pt
+\leftmargini 10pt % DLC
+\leftmarginii 19.8pt    % > \labelsep + width of '(m)'
+\leftmarginiii 16.8pt   % > \labelsep + width of 'vii.'
+\leftmarginiv 15.3pt    % > \labelsep + width of 'M.'
+\leftmarginv 9pt
+\leftmarginvi 9pt
+
+\leftmargin\leftmargini
+\labelsep 4.5pt
+\labelwidth\leftmargini\advance\labelwidth-\labelsep
+
+\def\@listI{\leftmargin\leftmargini \parsep 3.6pt plus 2pt minus 1pt%
+%\topsep 7.2pt plus 2pt minus 4pt%
+\topsep 0pt%                        % 00-09-07 job
+\itemsep 3.6pt plus 2pt minus 1pt}
+
+\let\@listi\@listI
+\@listi
+
+\def\@listii{\leftmargin\leftmarginii
+   \labelwidth\leftmarginii\advance\labelwidth-\labelsep
+   \topsep 3.6pt plus 2pt minus 1pt
+   \parsep 1.8pt plus 0.9pt minus 0.9pt
+   \itemsep \parsep}
+
+\def\@listiii{\leftmargin\leftmarginiii
+    \labelwidth\leftmarginiii\advance\labelwidth-\labelsep
+    \topsep 1.8pt plus 0.9pt minus 0.9pt
+    \parsep \z@ \partopsep 1pt plus 0pt minus 1pt
+    \itemsep \topsep}
+
+\def\@listiv{\leftmargin\leftmarginiv
+     \labelwidth\leftmarginiv\advance\labelwidth-\labelsep}
+
+\def\@listv{\leftmargin\leftmarginv
+     \labelwidth\leftmarginv\advance\labelwidth-\labelsep}
+
+\def\@listvi{\leftmargin\leftmarginvi
+     \labelwidth\leftmarginvi\advance\labelwidth-\labelsep}
+
+\def\labelenumi{\theenumi.}
+\def\theenumi{\arabic{enumi}}
+
+\def\labelenumii{(\theenumii)}
+\def\theenumii{\alph{enumii}}
+\def\p@enumii{\theenumi}
+
+\def\labelenumiii{\theenumiii.}
+\def\theenumiii{\roman{enumiii}}
+\def\p@enumiii{\theenumi(\theenumii)}
+
+\def\labelenumiv{\theenumiv.}
+\def\theenumiv{\Alph{enumiv}}
+\def\p@enumiv{\p@enumiii\theenumiii}
+
+\def\labelitemi{$\bullet$}
+\def\labelitemii{\bf --}
+\def\labelitemiii{$\ast$}
+\def\labelitemiv{$\cdot$}
+
+\def\verse{\let\\=\@centercr
+  \list{}{\itemsep\z@ \itemindent -1.5em\listparindent \itemindent
+          \rightmargin\leftmargin\advance\leftmargin 1.5em}\item[]}
+\let\endverse\endlist
+
+\def\quotation{\list{}{\listparindent 1.5em
+    \itemindent\listparindent
+    \rightmargin\leftmargin \parsep 0pt plus 1pt}\item[]}
+\let\endquotation=\endlist
+
+\def\quote{\list{}{\rightmargin\leftmargin}\item[]}
+\let\endquote=\endlist
+
+\def\descriptionlabel#1{\hspace\labelsep \bf #1}
+\def\description{\list{}{\labelwidth\z@ \itemindent-\leftmargin
+       \let\makelabel\descriptionlabel}}
+
+\let\enddescription\endlist
+
+\def\theequation{\arabic{equation}}
+
+\arraycolsep 4.5pt   % Half the space between columns in an array environment.
+\tabcolsep 5.4pt     % Half the space between columns in a tabular environment.
+\arrayrulewidth .4pt % Width of rules in array and tabular environment.
+\doublerulesep 1.8pt % Space between adjacent rules in array or tabular env.
+
+\tabbingsep \labelsep   % Space used by the \' command.  (See LaTeX manual.)
+
+\skip\@mpfootins =\skip\footins
+
+\fboxsep =2.7pt      % Space left between box and text by \fbox and \framebox.
+\fboxrule =.4pt      % Width of rules in box made by \fbox and \framebox.
+
+\def\thepart{\Roman{part}} % Roman numeral part numbers.
+\def\thesection       {\arabic{section}}
+\def\thesubsection    {\thesection.\arabic{subsection}}
+%\def\thesubsubsection {\thesubsection.\arabic{subsubsection}} % GM 7/30/2002
+%\def\theparagraph     {\thesubsubsection.\arabic{paragraph}}  % GM 7/30/2002
+\def\thesubparagraph  {\theparagraph.\arabic{subparagraph}}
+
+\def\@pnumwidth{1.55em}
+\def\@tocrmarg {2.55em}
+\def\@dotsep{4.5}
+\setcounter{tocdepth}{3}
+
+\def\tableofcontents{\@latexerr{\tableofcontents: Tables of contents are not
+  allowed in the `acmconf' document style.}\@eha}
+
+\def\l@part#1#2{\addpenalty{\@secpenalty}
+   \addvspace{2.25em plus 1pt}  % space above part line
+   \begingroup
+   \@tempdima 3em       % width of box holding part number, used by
+     \parindent \z@ \rightskip \@pnumwidth      %% \numberline
+     \parfillskip -\@pnumwidth
+     {\large \bf        % set line in \large boldface
+     \leavevmode        % TeX command to enter horizontal mode.
+     #1\hfil \hbox to\@pnumwidth{\hss #2}}\par
+     \nobreak           % Never break after part entry
+   \endgroup}
+
+\def\l@section#1#2{\addpenalty{\@secpenalty} % good place for page break
+   \addvspace{1.0em plus 1pt}   % space above toc entry
+   \@tempdima 1.5em             % width of box holding section number
+   \begingroup
+     \parindent \z@ \rightskip \@pnumwidth
+     \parfillskip -\@pnumwidth
+     \bf                        % Boldface.
+     \leavevmode                % TeX command to enter horizontal mode.
+      \advance\leftskip\@tempdima %% added 5 Feb 88 to conform to
+      \hskip -\leftskip           %% 25 Jan 88 change to \numberline
+     #1\nobreak\hfil \nobreak\hbox to\@pnumwidth{\hss #2}\par
+   \endgroup}
+
+
+\def\l@subsection{\@dottedtocline{2}{1.5em}{2.3em}}
+\def\l@subsubsection{\@dottedtocline{3}{3.8em}{3.2em}}
+\def\l@paragraph{\@dottedtocline{4}{7.0em}{4.1em}}
+\def\l@subparagraph{\@dottedtocline{5}{10em}{5em}}
+
+\def\listoffigures{\@latexerr{\listoffigures: Lists of figures are not
+  allowed in the `acmconf' document style.}\@eha}
+
+\def\l@figure{\@dottedtocline{1}{1.5em}{2.3em}}
+
+\def\listoftables{\@latexerr{\listoftables: Lists of tables are not
+  allowed in the `acmconf' document style.}\@eha}
+\let\l@table\l@figure
+
+\def\footnoterule{\kern-3\p@
+  \hrule width .4\columnwidth
+  \kern 2.6\p@}                 % The \hrule has default height of .4pt .
+% ------
+\long\def\@makefntext#1{\noindent 
+%\hbox to .5em{\hss$^{\@thefnmark}$}#1}   % original
+\hbox to .5em{\hss\textsuperscript{\@thefnmark}}#1}  % C. Clifton / GM Oct. 2nd. 2002
+% -------
+
+\long\def\@maketntext#1{\noindent
+#1}
+
+\long\def\@maketitlenotetext#1#2{\noindent
+            \hbox to 1.8em{\hss$^{#1}$}#2}
+
+\setcounter{topnumber}{2}
+\def\topfraction{.7}
+\setcounter{bottomnumber}{1}
+\def\bottomfraction{.3}
+\setcounter{totalnumber}{3}
+\def\textfraction{.2}
+\def\floatpagefraction{.5}
+\setcounter{dbltopnumber}{2}
+\def\dbltopfraction{.7}
+\def\dblfloatpagefraction{.5}
+
+% According to the CHI specifications, captions should be centered.
+% This looks kind of bad for multi-line captions, so I only center
+% 1-line captions.  
+\long\def\@makecaption#1#2{
+  \vskip 2pt % \baselineskip
+  \setbox\@tempboxa\hbox{\small
+\textbf{#1. #2}} % DLC
+  \ifdim \wd\@tempboxa >\hsize % IF longer than one line:
+     \small\textbf{#1. #2}\par     %   THEN set as ordinary paragraph.
+    \else                      %   ELSE  center. 
+     \hbox to\hsize{\hfil\box\@tempboxa\hfil}\par
+  \fi}
+
+\@ifundefined{figure}{\newcounter {figure}} % this is for LaTeX2e
+
+\def\fps@figure{tbp}
+\def\ftype@figure{1}
+\def\ext@figure{lof}
+\def\fnum@figure{Figure \thefigure}
+\def\figure{\@float{figure}}
+\def\endfigure{\end@float}
+\@namedef{figure*}{\@dblfloat{figure}}
+\@namedef{endfigure*}{\end@dblfloat}
+
+\@ifundefined{table}{\newcounter {table}} % this is for LaTeX2e
+
+\def\fps@table{tbp}
+\def\ftype@table{2}
+\def\ext@table{lot}
+\def\fnum@table{Table \thetable}
+\def\table{\@float{table}}
+\def\endtable{\end@float}
+\@namedef{table*}{\@dblfloat{table}}
+\@namedef{endtable*}{\end@dblfloat}
+
+% [jdf] create a \teaser command for adding a figure in title page
+\newcommand{\chi@empty}{}
+\newcommand{\chi@teaser}{}
+\newcommand{\teaser}[1]{\renewcommand{\chi@teaser}{#1}}
+
+\newlength{\teaserspace}
+\setlength{\teaserspace}{0.25in}
+%  [jdf] end teaser
+
+\newtoks\titleboxnotes
+\newcount\titleboxnoteflag
+
+\def\maketitle{\par
+ \begingroup
+   \def\thefootnote{\fnsymbol{footnote}}
+   \def\@makefnmark{\hbox
+       to 0pt{$^{\@thefnmark}$\hss}}
+     \twocolumn[\@maketitle]
+\@thanks
+ \endgroup
+ \setcounter{footnote}{0}
+ \let\maketitle\relax
+ \let\@maketitle\relax
+ \gdef\@thanks{}\gdef\@author{}\gdef\@title{}\gdef\@subtitle{}\let\thanks\relax
+ \@copyrightspace} % JRB 2008-08-13 this line was commented out for some reason
+                   % which meant that the copyright space wasn't reserved.
+                   % I re-enabled it.
+
+% actual class setup happens here:
+  \NeedsTeXFormat{LaTeX2e}
+  \ProvidesClass{sigchi} [2011/06/06 - V0.16]  % DLC
+  \RequirePackage{latexsym}% QUERY: are these two really needed?
+
+\def\@height{height}
+\def\@width{width}
+\def\@minus{minus}
+\def\@plus{plus}
+\def\hb@xt@{\hbox to}
+\newif\if@faircopy
+\@faircopyfalse
+\def\ds@faircopy{\@faircopytrue}
+
+\def\ds@preprint{\@faircopyfalse}
+
+\@twosidetrue
+\@mparswitchtrue
+\def\ds@draft{\overfullrule 5\p@}
+
+\lineskip \p@
+\normallineskip \p@
+\def\baselinestretch{1}
+\def\@ptsize{0} %needed for amssymbols.sty
+
+% allow use of old-style font change commands in LaTeX2e
+\@maxdepth\maxdepth
+%
+\DeclareOldFontCommand{\rm}{\ninept\rmfamily}{\mathrm}
+\DeclareOldFontCommand{\sf}{\normalfont\sffamily}{\mathsf}
+\DeclareOldFontCommand{\tt}{\normalfont\ttfamily}{\mathtt}
+\DeclareOldFontCommand{\bf}{\normalfont\bfseries}{\mathbf}
+\DeclareOldFontCommand{\it}{\normalfont\itshape}{\mathit}
+\DeclareOldFontCommand{\sl}{\normalfont\slshape}{\@nomath\sl}
+\DeclareOldFontCommand{\sc}{\normalfont\scshape}{\@nomath\sc}
+\DeclareRobustCommand*{\cal}{\@fontswitch{\relax}{\mathcal}}
+\DeclareRobustCommand*{\mit}{\@fontswitch{\relax}{\mathnormal}}
+
+ \renewcommand{\rmdefault}{cmr}  % was 'ttm'
+% Note! I have also found 'mvr' to work ESPECIALLY well.
+% Gerry - October 1999
+% You may need to change your LV1times.fd file so that sc is
+% mapped to cmcsc - -for smallcaps -- that is if you decide
+% to change {cmr} to {times} above. (Not recommended)
+  \renewcommand{\@ptsize}{}
+  \renewcommand{\normalsize}{%
+%    \@setfontsize\normalsize\@ixpt{10.5\p@}%\ninept%
+    \@setfontsize\normalsize\@xpt{11\p@}%\ninept% % from 9/10.5 to 10/11 00-09-07 job
+    \abovedisplayskip 6\p@ \@plus2\p@ \@minus\p@
+    \belowdisplayskip \abovedisplayskip
+    \abovedisplayshortskip 6\p@ \@minus 3\p@
+    \belowdisplayshortskip 6\p@ \@minus 3\p@
+    \let\@listi\@listI
+  }
+
+  \newcommand\scriptsize{\@setfontsize\scriptsize\@viipt{8\p@}}
+  \newcommand\tiny{\@setfontsize\tiny\@vpt{6\p@}}
+  \newcommand\large{\@setfontsize\large\@xiipt{14\p@}}
+  \newcommand\Large{\@setfontsize\Large\@xivpt{18\p@}}
+  \newcommand\LARGE{\@setfontsize\LARGE\@xviipt{20\p@}}
+  \newcommand\huge{\@setfontsize\huge\@xxpt{25\p@}}
+  \newcommand\Huge{\@setfontsize\Huge\@xxvpt{30\p@}}
+
+\normalsize
+
+% make aubox hsize/number of authors up to 3, less gutter
+% then showbox gutter showbox gutter showbox -- GKMT Aug 99
+%\newbox\@acmtitlebox % [jdf] no use of the box
+\def\@maketitle{\newpage
+ \null
+%\setbox\@acmtitlebox\vbox{   % [jdf] box not used
+\baselineskip 20pt            % [jdf] no skip
+  \vskip 1em                   % [jdf] removed Vertical space above title.
+   \begin{center}
+    {\ttlfnt \@title\par}       % Title set in 18pt Helvetica (Arial) bold size.
+    \vskip 0.5ex                % [jdf] Vertical space after title.
+%This should be the subtitle.
+{\subttlfnt \the\subtitletext\par}\vskip 0.7ex%\fi [jdf] less vertical space
+    {\baselineskip 16pt\aufnt   % each author set in \12 pt Arial, in a
+     \lineskip .5em             % tabular environment
+     \begin{tabular}[t]{c}\@author
+     \end{tabular}\par}
+    \vskip 1em                  % [jdf] reduced Vertical space after author.
+   \end{center}%                % [jdf] begin add teaser
+   \ifx\chi@teaser\chi@empty \else%
+    \begingroup%
+      \def\@captype{figure}%
+        \chi@teaser%
+        \endgroup\par%
+        \vspace{\teaserspace}%  % [jdf] end teaser
+    \fi}
+% \dimen0=\ht\@acmtitlebox % [jdf] removed box stuff
+% \advance\dimen0 by -12.75pc\relax % Increased space for title box -- KBT
+% \advance\dimen0 by -8.75pc\relax % Increased space for title box -- KBT  % 00-09-07 job (decreased)
+% \unvbox\@acmtitlebox
+% \ifdim\dimen0<0.0pt\relax\vskip-\dimen0\fi}
+
+
+\newcount\titlenotecount
+\global\titlenotecount=0
+\newtoks\tntoks
+\newtoks\tntokstwo
+\newtoks\tntoksthree
+\newtoks\tntoksfour
+\newtoks\tntoksfive
+
+\def\abstract{
+\ifnum\titlenotecount>0 % was =1
+    \insert\footins{%
+    \reset@font\footnotesize
+        \interlinepenalty\interfootnotelinepenalty
+        \splittopskip\footnotesep
+        \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
+        \hsize\columnwidth \@parboxrestore
+        \protected@edef\@currentlabel{%
+        }%
+        \color@begingroup
+\ifnum\titlenotecount=1
+      \@maketntext{%
+         \raisebox{4pt}{$\ast$}\rule\z@\footnotesep\ignorespaces\the\tntoks\@finalstrut\strutbox}%
+\fi
+\ifnum\titlenotecount=2
+      \@maketntext{%
+      \raisebox{4pt}{$\ast$}\rule\z@\footnotesep\ignorespaces\the\tntoks\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\dagger$}\rule\z@\footnotesep\ignorespaces\the\tntokstwo\@finalstrut\strutbox}%
+\fi
+\ifnum\titlenotecount=3
+      \@maketntext{%
+         \raisebox{4pt}{$\ast$}\rule\z@\footnotesep\ignorespaces\the\tntoks\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\dagger$}\rule\z@\footnotesep\ignorespaces\the\tntokstwo\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\ddagger$}\rule\z@\footnotesep\ignorespaces\the\tntoksthree\@finalstrut\strutbox}%
+\fi
+\ifnum\titlenotecount=4
+      \@maketntext{%
+         \raisebox{4pt}{$\ast$}\rule\z@\footnotesep\ignorespaces\the\tntoks\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\dagger$}\rule\z@\footnotesep\ignorespaces\the\tntokstwo\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\ddagger$}\rule\z@\footnotesep\ignorespaces\the\tntoksthree\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\S$}\rule\z@\footnotesep\ignorespaces\the\tntoksfour\@finalstrut\strutbox}%
+\fi
+\ifnum\titlenotecount=5
+      \@maketntext{%
+         \raisebox{4pt}{$\ast$}\rule\z@\footnotesep\ignorespaces\the\tntoks\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\dagger$}\rule\z@\footnotesep\ignorespaces\the\tntokstwo\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\ddagger$}\rule\z@\footnotesep\ignorespaces\the\tntoksthree\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\S$}\rule\z@\footnotesep\ignorespaces\the\tntoksfour\par\@finalstrut\strutbox}%
+\@maketntext{%
+         \raisebox{4pt}{$\P$}\rule\z@\footnotesep\ignorespaces\the\tntoksfive\@finalstrut\strutbox}%
+\fi
+   \color@endgroup} %g}
+\fi
+\setcounter{footnote}{0}
+\section*{ABSTRACT}\normalsize %\the\parskip \the\baselineskip%\ninept
+}
+
+\def\endabstract{\if@twocolumn\else\endquotation\fi}
+
+\def\keywords#1{%\if@twocolumn
+\section*{Author Keywords}
+\begin{flushleft}#1\end{flushleft}
+%\else \small
+%\quotation #1
+%\fi
+}
+
+\def\classification#1{%\if@twocolumn
+\section*{ACM Classification Keywords}
+\begin{flushleft}#1\end{flushleft}
+%\else \small
+%\quotation\the\parskip
+%\fi
+}
+
+% I've pulled the check for 2 cols, since proceedings are _always_
+% two-column  11 Jan 2000 gkmt
+\def\terms#1{%\if@twocolumn
+\section*{General Terms}
+\begin{flushleft}#1\end{flushleft}
+%\else \small
+%\quotation\the\parskip
+%\fi
+}
+
+% -- Classification needs to be a bit smart due to optionals - Gerry/Georgia November 2nd. 1999
+\newcount\catcount
+\global\catcount=1
+
+\def\category#1#2#3{%
+\ifnum\catcount=1
+\section*{ACM Classification Keywords}  % DLC
+\advance\catcount by 1\else{\unskip; }\fi
+    \@ifnextchar [{\@category{#1}{#2}{#3}}{\@category{#1}{#2}{#3}[]}%
+}
+
+\def\@category#1#2#3[#4]{%
+    \begingroup
+        \let\and\relax
+%            #1 [\textbf{#2}]% 
+            #1 #2%   % DLC
+            \if!#4!%
+                \if!#3!\else : #3\fi
+            \else
+                :\space
+                \if!#3!\else #3\kern\z@---\hskip\z@\fi
+                \textit{#4}%
+            \fi
+    \endgroup
+}
+%
+
+%%% This section (written by KBT) handles the 1" box in the lower left
+%%% corner of the left column of the first page by creating a picture,
+%%% and inserting the predefined string at the bottom (with a negative
+%%% displacement to offset the space allocated for a non-existent
+%%% caption).
+%%%
+\newtoks\copyrightnotice
+\def\ftype@copyrightbox{8}
+\def\@copyrightspace{
+\@float{copyrightbox}[b]
+\begin{center}
+\setlength{\unitlength}{1pc}
+\ifnum\ACM@basesize=9
+\begin{picture}(20,6) %Space for copyright notice
+\put(0,-0.95){\crnotice{\@toappear}}
+\end{picture}
+\fi
+\ifnum\ACM@basesize=10
+\begin{picture}(20,7) %Space for copyright notice
+\put(0,-0.95){\crnotice{\@toappear}}
+\end{picture}
+\fi
+\end{center}
+\end@float}
+
+\def\@toappear{} % Default setting blank - commands below change this.
+\long\def\toappear#1{\def\@toappear{\parbox[b]{20pc}{\baselineskip 9pt#1}}}
+\def\toappearbox#1{\def\@toappear{\raisebox{5pt}{\framebox[20pc]{\parbox[b]{19pc}{#1}}}}}
+
+\newtoks\conf
+\newtoks\confinfo
+\def\conferenceinfo#1#2{\global\conf={#1}\global\confinfo{#2}}
+
+
+% Introduce a "chi_draft" option which conditionally enables marginpars with a warning.
+\let\oldmarginpar\marginpar
+\renewcommand{\marginpar}[2][]{\@latexerr{The marginpar command is not allowed in the
+  `acmconf' document style.}\@eha}
+\DeclareOption{chi_draft}{
+  \marginparwidth 40pt
+  \renewcommand{\marginpar}[2][]{\@latex@warning{The marginpar command is not allowed in the `acmconf'
+  document style. Remove all occurences before final document submission.}\oldmarginpar[#1]{#2}}
+}
+% Immediately execute the options at this point. Reason is discussed
+% here: https://tex.stackexchange.com/questions/203387/
+\ProcessOptions
+
+\mark{{}{}}     % Initializes TeX's marks
+
+\def\today{\ifcase\month\or
+  January\or February\or March\or April\or May\or June\or
+  July\or August\or September\or October\or November\or December\fi
+  \space\number\day, \number\year}
+
+\def\@begintheorem#1#2{%
+    \trivlist
+    \item[%
+        \hskip 10\p@
+        \hskip \labelsep
+        {{\sc #1}\hskip 5\p@\relax#2.}%
+    ]
+    \it
+}
+\def\@opargbegintheorem#1#2#3{%
+    \trivlist
+    \item[%
+        \hskip 10\p@
+        \hskip \labelsep
+        {\sc #1\ #2\             % This mod by Gerry to enumerate corollaries
+   \setbox\@tempboxa\hbox{(#3)}  % and bracket the 'corollary title'
+        \ifdim \wd\@tempboxa>\z@ % and retain the correct numbering of e.g. theorems
+            \hskip 5\p@\relax    % if they occur 'around' said corollaries.
+            \box\@tempboxa       % Gerry - Nov. 1999.
+        \fi.}%
+    ]
+    \it
+}
+\newif\if@qeded
+\global\@qededfalse
+
+% -- original
+%\def\proof{%
+%  \vspace{-\parskip} % GM July 2000 (for tighter spacing)
+%    \global\@qededfalse
+%    \@ifnextchar[{\@xproof}{\@proof}%
+%}
+% -- end of original
+
+% (JSS) Fix for vertical spacing bug - Gerry Murray July 30th. 2002
+\def\proof{%
+\vspace{-\lastskip}\vspace{-\parsep}\penalty-51%
+\global\@qededfalse
+\@ifnextchar[{\@xproof}{\@proof}%
+}
+
+\def\endproof{%
+    \if@qeded\else\qed\fi
+    \endtrivlist
+}
+\def\@proof{%
+    \trivlist
+    \item[%
+        \hskip 10\p@
+        \hskip \labelsep
+        {\sc Proof.}%
+    ]
+    \ignorespaces
+}
+\def\@xproof[#1]{%
+    \trivlist
+    \item[\hskip 10\p@\hskip \labelsep{\sc Proof #1.}]%
+    \ignorespaces
+}
+\def\qed{%
+    \unskip
+    \kern 10\p@
+    \begingroup
+        \unitlength\p@
+        \linethickness{.4\p@}%
+        \framebox(6,6){}%
+    \endgroup
+    \global\@qededtrue
+}
+
+\def\newdef#1#2{%
+    \expandafter\@ifdefinable\csname #1\endcsname
+        {\@definecounter{#1}%
+         \expandafter\xdef\csname the#1\endcsname{\@thmcounter{#1}}%
+         \global\@namedef{#1}{\@defthm{#1}{#2}}%
+         \global\@namedef{end#1}{\@endtheorem}%
+    }%
+}
+\def\@defthm#1#2{%
+    \refstepcounter{#1}%
+    \@ifnextchar[{\@ydefthm{#1}{#2}}{\@xdefthm{#1}{#2}}%
+}
+\def\@xdefthm#1#2{%
+    \@begindef{#2}{\csname the#1\endcsname}%
+    \ignorespaces
+}
+\def\@ydefthm#1#2[#3]{%
+    \trivlist
+    \item[%
+        \hskip 10\p@
+        \hskip \labelsep
+        {\it #2%
+         \savebox\@tempboxa{#3}%
+         \ifdim \wd\@tempboxa>\z@
+            \ \box\@tempboxa
+         \fi.%
+        }]%
+    \ignorespaces
+}
+\def\@begindef#1#2{%
+    \trivlist
+    \item[%
+        \hskip 10\p@
+        \hskip \labelsep
+        {\it #1\ \rm #2.}%
+    ]%
+}
+\def\theequation{\arabic{equation}}
+
+\newcounter{part}
+\newcounter{section}
+\newcounter{subsection}[section]
+\newcounter{subsubsection}[subsection]
+\newcounter{paragraph}[subsubsection]
+\def\thepart{\Roman{part}}
+\def\thesection{\arabic{section}}
+\def\thesubsection{\thesection.\arabic{subsection}}
+\def\thesubsubsection{\thesubsection.\arabic{subsubsection}} %removed \subsecfnt 29 July 2002 gkmt
+\def\theparagraph{\thesubsubsection.\arabic{paragraph}} %removed \subsecfnt 29 July 2002 gkmt
+
+\newif\if@uchead
+\@ucheadfalse
+
+%% CHANGES: NEW NOTE
+%% NOTE: OK to use old-style font commands below, since they were
+%% suitably redefined for LaTeX2e
+%% END CHANGES
+\def\part{%
+    \@startsection{part}{9}{\z@}{-10\p@ \@plus -4\p@ \@minus -2\p@}
+        {4\p@}{\normalsize\@ucheadtrue}%
+}
+
+% Rationale for changes made in next four definitions:
+% "Before skip" is made elastic to provide some give in setting columns (vs.
+% parskip, which is non-elastic to keep section headers "anchored" to their
+% subsequent text.
+%
+% "After skip" is minimized -- BUT setting it to 0pt resulted in run-in heads, despite
+% the documentation asserted only after-skip < 0pt would have result.
+%
+% Baselineskip added to style to ensure multi-line section titles, and section heads
+% followed by another section head rather than text, are decently spaced vertically.
+% 12 Jan 2000 gkmt
+\def\section{%
+    \@startsection{section}{1}{\z@}{8pt plus 3pt minus 3pt}%
+    {0.5pt}{\baselineskip=14pt\secfnt\@ucheadtrue}%
+}
+
+\def\subsection{%
+    \@startsection{subsection}{2}{\z@}{8pt plus 3pt minus 3pt}%
+    {0.5pt}{\baselineskip=14pt\secfnt}%
+}
+\def\subsubsection{%
+    \@startsection{subsubsection}{3}{\z@}{4pt plus 2pt minus 1pt}%
+    {0.5pt}{\baselineskip=14pt\subsecfnt}%
+}
+
+\def\paragraph{%
+    \@startsection{paragraph}{3}{\z@}{4pt plus 2pt minus 1pt}%
+    {0.5pt}{\baselineskip=14pt\subsecfnt}%
+}
+
+\let\@period=.
+\def\@startsection#1#2#3#4#5#6{%
+        \if@noskipsec  %gkmt, 11 aug 99
+        \global\let\@period\@empty
+        \leavevmode
+        \global\let\@period.%
+    \fi
+    \par
+    \@tempskipa #4\relax
+    \@afterindenttrue
+    \ifdim \@tempskipa <\z@
+        \@tempskipa -\@tempskipa
+        \@afterindentfalse
+    \fi
+    %\if@nobreak  11 Jan 00 gkmt
+        %\everypar{}
+    %\else
+        \addpenalty\@secpenalty
+        \addvspace\@tempskipa
+    %\fi
+    \parskip=0pt
+    \@ifstar
+        {\@ssect{#3}{#4}{#5}{#6}}
+        {\@dblarg{\@sect{#1}{#2}{#3}{#4}{#5}{#6}}}%
+}
+
+
+\def\@ssect#1#2#3#4#5{%
+  \@tempskipa #3\relax
+  \ifdim \@tempskipa>\z@
+    \begingroup
+      #4{%
+        \@hangfrom{\hskip #1}%
+          \interlinepenalty \@M #5\@@par}%
+    \endgroup
+  \else
+    \def\@svsechd{#4{\hskip #1\relax #5}}%
+  \fi
+  \par\nobreak
+  \vskip -6pt  % [jdf] less space between section as in the Word template
+  \@xsect{#3}\parskip=6pt} % [jdf] paragraph skip shorter
+
+
+\def\@sect#1#2#3#4#5#6[#7]#8{%
+    \ifnum #2>\c@secnumdepth
+        \let\@svsec\@\refstepcounter{#1}
+    \else
+        \refstepcounter{#1}%
+        \edef\@svsec{%
+            \begingroup
+                %\ifnum#2>2 \noexpand\rm \fi % changed to next 29 July 2002 gkmt
+            \ifnum#2>2 \noexpand#6 \fi
+                \csname the#1\endcsname
+            \endgroup
+            \ifnum #2=1\relax .\fi
+            \hskip 1em
+        }%
+    \fi
+    \@tempskipa #5\relax
+    \ifdim \@tempskipa>\z@
+        \begingroup
+            #6\relax
+            \@hangfrom{\hskip #3\relax\@svsec}%
+            \begingroup
+                \interlinepenalty \@M
+                \if@uchead
+                    \uppercase{#8}%
+                \else
+                    #8%
+                \fi
+                \par
+            \endgroup
+        \endgroup
+        \csname #1mark\endcsname{#7}%
+        \par\nobreak
+        \vskip -6pt  % [jdf] less space between section as in the Word template
+      \addcontentsline{toc}{#1}{%
+            \ifnum #2>\c@secnumdepth \else
+                \protect\numberline{\csname the#1\endcsname}%
+            \fi
+            #7%
+        }%
+    \else
+        \def\@svsechd{%
+            #6%
+            \hskip #3\relax
+            \@svsec
+            \if@uchead
+                \uppercase{#8}%
+            \else
+                #8%
+            \fi
+            \csname #1mark\endcsname{#7}%
+            \addcontentsline{toc}{#1}{%
+                \ifnum #2>\c@secnumdepth \else
+                    \protect\numberline{\csname the#1\endcsname}%
+                \fi
+                #7%
+            }%
+        }%
+    \fi
+    \@xsect{#5}\parskip=6pt% [jdf] shorter
+}
+\def\@xsect#1{%
+    \@tempskipa #1\relax
+    \ifdim \@tempskipa>\z@
+        \par
+        \nobreak
+        \vskip \@tempskipa
+        \@afterheading
+    \else
+        \global\@nobreakfalse
+        \global\@noskipsectrue
+        \everypar{%
+            \if@noskipsec
+                \global\@noskipsecfalse
+                \clubpenalty\@M
+                \hskip -\parindent
+                \begingroup
+                    \@svsechd
+                    \@period
+                \endgroup
+                \unskip
+                \@tempskipa #1\relax
+                \hskip -\@tempskipa
+            \else
+                \clubpenalty \@clubpenalty
+                \everypar{}%
+            \fi
+        }%
+    \fi
+    \ignorespaces
+}
+
+\def\@trivlist{%
+    \@topsepadd\topsep
+    \if@noskipsec
+        \global\let\@period\@empty
+        \leavevmode
+        \global\let\@period.%
+    \fi
+    \ifvmode
+        \advance\@topsepadd\partopsep
+    \else
+        \unskip
+        \par
+    \fi
+    \if@inlabel
+        \@noparitemtrue
+        \@noparlisttrue
+    \else
+        \@noparlistfalse
+        \@topsep\@topsepadd
+    \fi
+    \advance\@topsep \parskip
+    \leftskip\z@skip
+    \rightskip\@rightskip
+    \parfillskip\@flushglue
+    \@setpar{\if@newlist\else{\@@par}\fi}
+    \global\@newlisttrue
+    \@outerparskip\parskip
+}
+
+%%% Actually, 'abbrev' works just fine as the default - Gerry Feb. 2000
+%%% Bibliography style.
+
+\parindent 0pt
+\typeout{Using 'Abbrev' bibliography style}
+\newcommand\bibyear[2]{%
+    \unskip\quad\ignorespaces#1\unskip
+    \if#2..\quad \else \quad#2 \fi
+}
+\newcommand{\bibemph}[1]{{\em#1}}
+\newcommand{\bibemphic}[1]{{\em#1\/}}
+\newcommand{\bibsc}[1]{{\sc#1}}
+\def\@normalcite{%
+    \def\@cite##1##2{[##1\if@tempswa , ##2\fi]}%
+}
+\def\@citeNB{%
+    \def\@cite##1##2{##1\if@tempswa , ##2\fi}%
+}
+\def\@citeRB{%
+    \def\@cite##1##2{##1\if@tempswa , ##2\fi]}%
+}
+\def\start@cite#1#2{%
+    \edef\citeauthoryear##1##2##3{%
+        ###1%
+        \ifnum#2=\z@ \else\ ###2\fi
+    }%
+    \ifnum#1=\thr@@
+        \let\@@cite\@citeyear
+    \else
+        \let\@@cite\@citenormal
+    \fi
+    \@ifstar{\@citeNB\@@cite}{\@normalcite\@@cite}%
+}
+\def\cite{\start@cite23}
+\def\citeNP{\cite*}
+\def\citeA{\start@cite10}
+\def\citeANP{\citeA*}
+\def\shortcite{\start@cite23}
+\def\shortciteNP{\shortcite*}
+\def\shortciteA{\start@cite20}
+\def\shortciteANP{\shortciteA*}
+\def\citeyear{\start@cite30}
+\def\citeyearNP{\citeyear*}
+\def\citeN{%
+    \@citeRB
+    \def\citeauthoryear##1##2##3{##1\ [##3%
+        \def\reserved@a{##1}%
+        \def\citeauthoryear####1####2####3{%
+            \def\reserved@b{####1}%
+            \ifx\reserved@a\reserved@b
+                ####3%
+            \else
+                \errmessage{Package acmart Error: author mismatch
+                         in \string\citeN^^J^^J%
+                    See the acmart package documentation for explanation}%
+            \fi
+        }%
+    }%
+    \@ifstar\@citeyear\@citeyear
+}
+\def\shortciteN{%
+    \@citeRB
+    \def\citeauthoryear##1##2##3{##2\ [##3%
+        \def\reserved@a{##2}%
+        \def\citeauthoryear####1####2####3{%
+            \def\reserved@b{####2}%
+            \ifx\reserved@a\reserved@b
+                ####3%
+            \else
+                \errmessage{Package acmart Error: author mismatch
+                         in \string\shortciteN^^J^^J%
+                    See the acmart package documentation for explanation}%
+            \fi
+        }%
+    }%
+    \@ifstar\@citeyear\@citeyear % changed from  "\@ifstart" 12 Jan 2000 gkmt
+}
+
+    \def\@citenormal{%
+    \@ifnextchar [{\@tempswatrue\@citex;}
+                  {\@tempswafalse\@citex[]}% GERRY FIX FOR BABEL 3/20/2009
+}
+\def\@citeyear{%
+    \@ifnextchar [{\@tempswatrue\@citex,}%
+                  {\@tempswafalse\@citex[]}% GERRY FIX FOR BABEL 3/20/2009
+}
+\def\@citex#1[#2]#3{%
+    \let\@citea\@empty
+    \@cite{%
+        \@for\@citeb:=#3\do{%
+            \@citea
+            \def\@citea{#1, }% 	% GERRY FIX FOR BABEL 3/20/2009 -- SO THAT YOU GET [1, 2] IN THE BODY TEXT
+            \edef\@citeb{\expandafter\@iden\@citeb}%
+            \if@filesw
+                \immediate\write\@auxout{\string\citation{\@citeb}}%
+            \fi
+            \@ifundefined{b@\@citeb}{%
+                {\bf ?}%
+                \@warning{%
+                    Citation `\@citeb' on page \thepage\space undefined%
+                }%
+            }%
+            {\csname b@\@citeb\endcsname}%
+        }%
+    }{#2}%
+}
+\let\@biblabel\@gobble
+\newdimen\bibindent
+\bibindent=0em
+\newskip\bibsep % [jdf] allow bib space tweaking
+\bibsep 2pt \@plus 1pt \@minus 1pt % [jdf] initial spacing between ref entries
+\setcounter{enumi}{1}
+\def\thebibliography#1{%
+%% Comment this to have blue DOI links.
+\makeatletter
+\def\url@leostyle{% 
+\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\color{black}\small\bf\ttfamily}}}
+\makeatother
+\urlstyle{leo}
+%%
+    \section{%
+       {References}
+        \@mkboth{{\refname}}{{\refname}}%
+    }%
+%    \list{[\arabic{enumi}]}{%
+    \list{\arabic{enumi}.}{% DLC
+%        \settowidth\labelwidth{[#1]}%
+        \settowidth\labelwidth{#1.}% DLC
+        \leftmargin\labelwidth
+        \advance\leftmargin\labelsep
+        \advance\leftmargin\bibindent
+        \itemindent -\bibindent
+        \listparindent \itemindent
+        \usecounter{enumi}
+        \itemsep\bibsep% [jdf] standard spacing between references
+    }%
+    \let\newblock\@empty
+    \raggedright  %% 7 JAN 2000 gkmt
+    \sloppy
+    \sfcode`\.=1000\relax
+}
+
+
+\gdef\balancecolumns
+{\vfill\eject
+\global\@colht=\textheight
+\global\ht\@cclv=\textheight
+}
+
+\newcount\colcntr
+\global\colcntr=0
+\newbox\savebox
+
+\gdef \@makecol {%
+\global\advance\colcntr by 1
+\ifnum\colcntr>2 \global\colcntr=1\fi
+   \ifvoid\footins
+     \setbox\@outputbox \box\@cclv
+   \else
+     \setbox\@outputbox \vbox{%
+\boxmaxdepth \@maxdepth
+       \@tempdima\dp\@cclv
+       \unvbox \@cclv
+       \vskip-\@tempdima
+       \vskip \skip\footins
+       \color@begingroup
+         \normalcolor
+         \footnoterule
+         \unvbox \footins
+       \color@endgroup
+       }%
+   \fi
+   \xdef\@freelist{\@freelist\@midlist}%
+   \global \let \@midlist \@empty
+   \@combinefloats
+   \ifvbox\@kludgeins
+     \@makespecialcolbox
+   \else
+     \setbox\@outputbox \vbox to\@colht {%
+\@texttop
+       \dimen@ \dp\@outputbox
+       \unvbox \@outputbox
+   \vskip -\dimen@
+       \@textbottom
+       }%
+   \fi
+   \global \maxdepth \@maxdepth
+}
+\def\titlenote{\@ifnextchar[\@xtitlenote{\stepcounter\@mpfn
+\global\advance\titlenotecount by 1
+\ifnum\titlenotecount=1
+    \raisebox{9pt}{$\ast$}
+\fi
+\ifnum\titlenotecount=2
+    \raisebox{9pt}{$\dagger$}
+\fi
+\ifnum\titlenotecount=3
+    \raisebox{9pt}{$\ddagger$}
+\fi
+\ifnum\titlenotecount=4
+\raisebox{9pt}{$\S$}
+\fi
+\ifnum\titlenotecount=5
+\raisebox{9pt}{$\P$}
+\fi
+         \@titlenotetext
+}}
+
+\long\def\@titlenotetext#1{\insert\footins{%
+\ifnum\titlenotecount=1\global\tntoks={#1}\fi
+\ifnum\titlenotecount=2\global\tntokstwo={#1}\fi
+\ifnum\titlenotecount=3\global\tntoksthree={#1}\fi
+\ifnum\titlenotecount=4\global\tntoksfour={#1}\fi
+\ifnum\titlenotecount=5\global\tntoksfive={#1}\fi
+    \reset@font\footnotesize
+    \interlinepenalty\interfootnotelinepenalty
+    \splittopskip\footnotesep
+    \splitmaxdepth \dp\strutbox \floatingpenalty \@MM
+    \hsize\columnwidth \@parboxrestore
+    \protected@edef\@currentlabel{%
+    }%
+    \color@begingroup
+   \color@endgroup}}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%
+\ps@plain
+\baselineskip=11pt
+\let\thepage\relax % For  NO page numbers - Gerry Nov. 30th. 1999
+\def\setpagenumber#1{\global\setcounter{page}{#1}}
+%\pagenumbering{arabic}  % Arabic page numbers but commented out for NO page numbes - Gerry Nov. 30th. 1999
+\twocolumn             % Double column.
+\flushbottom           % Even bottom -- alas, does not balance columns at end of document
+\pagestyle{plain}
+
+% Need Copyright Year and Copyright Data to be user definable (in .tex file).
+% Gerry Nov. 30th. 1999
+\newtoks\copyrtyr
+\newtoks\acmcopyr
+\newtoks\boilerplate
+
+\global\acmcopyr={X-XXXXX-XX-X/XX/XX}  % Default - 5/11/2001 *** Gerry
+\global\copyrtyr={\the\year}                % Default - 3/3/2003 *** Gerry
+\def\acmPrice#1{\gdef\@acmPrice{#1}}
+\acmPrice{} %article price  % Changed to 15 - June 2012 - Gerry
+
+
+\def\CopyrightYear#1{\global\copyrtyr{#1}}
+\def\crdata#1{\global\acmcopyr{#1}}
+\def\permission#1{\global\boilerplate{#1}}
+
+% ISBN
+%
+\def\isbn#1{\global\acmcopyr={#1}}
+\isbn{978-1-4503-2138-9}
+
+\RequirePackage{url}
+\urlstyle{rm}
+\def\doi#1{\def\@doi{#1}}
+\doi{10.1145/1235}
+\def\printdoi#1{\url{#1}}
+
+
+
+% Copyright
+\RequirePackage{acmcopyright}
+\setcopyright{none}
+
+%
+\global\boilerplate={\@copyrightpermission}
+%
+\newtoks\copyrightetc
+\ifnum\ACM@basesize=9\relax
+\global\copyrightetc{%
+{\noindent\confname\ \the\conf } \the\confinfo \par\smallskip
+  \if@printcopyright
+    \copyright\ \the\copyrtyr\ \@copyrightowner
+  \fi
+  \if@acmowned ISBN \else\ifnum\acm@copyrightmode=2 ISBN \else \par\smallskip ACM ISBN \fi\fi
+ \the\acmcopyr\ifx\@acmPrice\@empty.\else\dots\@acmPrice\fi\par\smallskip
+{DOI: \small\expandafter\printdoi\expandafter{\@doi}}} 
+\toappear{\fontsize{7pt}{8pt}\fontfamily{ptm}\selectfont
+  \the\boilerplate\par\smallskip
+ \the\copyrightetc}
+\fi
+\ifnum\ACM@basesize=10\relax
+\global\copyrightetc{%
+{\noindent\confname\ \the\conf\ \the\confinfo}\par\smallskip
+  \if@printcopyright
+    \copyright\ \the\copyrtyr\ \@copyrightowner
+  \fi
+  \if@acmowned ISBN \else\ifnum\acm@copyrightmode=2 ISBN \else \par\smallskip ACM ISBN \fi\fi
+ \the\acmcopyr\ifx\@acmPrice\@empty.\else\dots\@acmPrice\fi\par\smallskip
+{DOI: \small\expandafter\printdoi\expandafter{\@doi}}} 
+\toappear{\fontsize{7.5pt}{8.5pt}\fontfamily{ptm}\selectfont
+  \the\boilerplate\par\smallskip
+ \the\copyrightetc}
+\fi
+
+\clubpenalty=10000 
+\widowpenalty = 10000
+
+%% 
+% For the CCSXML 2012 Categories
+
+\let\@concepts\@empty
+% Support for CCSXML file
+\RequirePackage{comment}
+\excludecomment{CCSXML}
+
+% New concepts scheme
+%
+% The first argument is the significance, the
+% second is the concept(s)
+%
+\newcommand\ccsdesc[2][100]{%
+  \ccsdesc@parse#1~#2~}
+%
+% The parser of the expression Significance~General~Specific
+%
+\def\ccsdesc@parse#1~#2~#3~{%
+  \expandafter\ifx\csname CCS@#2\endcsname\relax
+    \expandafter\gdef\csname CCS@#2\endcsname{\textbullet\textbf{#2} $\to$ }%
+  \g@addto@macro{\@concepts}{\csname CCS@#2\endcsname}\fi
+  \expandafter\g@addto@macro\expandafter{\csname CCS@#2\endcsname}{%
+    \ifnum#1>499\textbf{#3; }\else
+    \ifnum#1>299\textit{#3; }\else
+    #3; \fi\fi}}
+
+\newcommand\printccsdesc{%
+  \ifx\@concepts\@empty\else
+  \if@twocolumn
+    \section*{CCS Concepts}
+    \@concepts
+    \else \small
+    \quotation{\@concepts}%
+    \fi
+    \fi}
+
+
+%% DanCo, 10/19/11: Added this to reduce overfull lines per Sheridan
+%% request; it leads to occasionally unpleasant extra whitespace,
+%% though actually no worse and perhaps better than the 
+%% default Word template.
+%%
+%% This can be manually controlled instead by authors in text
+%% by putting \sloppy before and \fussy immediately 
+%% after troublesome paras.  Idea found at
+%% http://www.economics.utoronto.ca/osborne/latex/PMAKEUP.HTM
+
+\sloppy
@@ -0,0 +1,48 @@
+@book{kon2012,
+  title={Software Livre e Propriedade Intelectual: Aspectos Jur{\'\i}dicos, Licen{\c{c}}as e Modelos de Neg{\'o}cios},
+  author={Kon, Fabio and Lago, Nelson and Meirelles, Paulo and Sabino, Vanessa},
+  journal={http://ccsl. ime. usp. br/files/slpi. pdf>. Acesso em},
+  volume={2},
+  pages={12},
+  year={2012}
+}
+
+@article{hippel2003,
+ author = {Hippel, Eric von and Krogh, Georg von},
+ title = {Open Source Software and the "Private-Collective" Innovation Model: Issues for Organization Science},
+ journal = {Organization Science},
+ issue_date = {March 2003},
+ volume = {14},
+ number = {2},
+ month = mar,
+ year = {2003},
+ issn = {1526-5455},
+ pages = {209--223},
+ numpages = {15},
+ url = {http://dx.doi.org/10.1287/orsc.14.2.209.14992},
+ doi = {10.1287/orsc.14.2.209.14992},
+ acmid = {970585},
+ publisher = {INFORMS},
+ address = {Institute for Operations Research and the Management Sciences (INFORMS), Linthicum, Maryland, USA},
+ keywords = {Incentives, Innovation, Open source software, User innovation, users, collective action},
+} 
+
+@phdthesis{meirelles2013,
+   title={Monitoring Source Code Metrics in Free Software Projects},
+   author={Meirelles, Paulo Roberto Miranda},
+   year={2013},
+   school={Department of Computer Science -- Institute of Mathematics and Statistics of University of S{\~a}o Paulo},
+   note = {[in portuguese]},
+   url={http://www.teses.usp.br/teses/disponiveis/45/45134/tde-27082013-090242/en.php}
+}
+
+@mastersthesis{sabino2009,
+  title={A systematic study on Free Software License},
+  author={Vanessa Sabino},
+  year={2009},
+  school={Department of Computer Science -- Institute of Mathematics and Statistics of University of S{\~a}o Paulo},
+   note = {[in portuguese]},
+   url={http://www.teses.usp.br/teses/disponiveis/45/45134/tde-14032012-003454/en.php}
+
+}
+
@@ -0,0 +1,164 @@
+\documentclass{sigchi}
+
+% Use this section to set the ACM copyright statement (e.g. for
+% preprints).  Consult the conference website for the camera-ready
+% copyright statement.
+
+% Copyright
+\CopyrightYear{2017}
+%\setcopyright{acmcopyright}
+\setcopyright{acmlicensed}
+%\setcopyright{rightsretained}
+%\setcopyright{usgov}
+%\setcopyright{usgovmixed}
+%\setcopyright{cagov}
+%\setcopyright{cagovmixed}
+% DOI
+\doi{http://dx.doi.org/10.475/123_4}
+% ISBN
+\isbn{123-4567-24-567/08/06}
+%Conference
+\conferenceinfo{CHI'16,}{May 07--12, 2016, San Jose, CA, USA}
+%Price
+\acmPrice{\$15.00}
+
+% Use this command to override the default ACM copyright statement
+% (e.g. for preprints).  Consult the conference website for the
+% camera-ready copyright statement.
+
+%% HOW TO OVERRIDE THE DEFAULT COPYRIGHT STRIP --
+%% Please note you need to make sure the copy for your specific
+%% license is used here!
+% \toappear{
+% Permission to make digital or hard copies of all or part of this work
+% for personal or classroom use is granted without fee provided that
+% copies are not made or distributed for profit or commercial advantage
+% and that copies bear this notice and the full citation on the first
+% page. Copyrights for components of this work owned by others than ACM
+% must be honored. Abstracting with credit is permitted. To copy
+% otherwise, or republish, to post on servers or to redistribute to
+% lists, requires prior specific permission and/or a fee. Request
+% permissions from \href{mailto:Permissions@acm.org}{Permissions@acm.org}. \\
+% \emph{CHI '16},  May 07--12, 2016, San Jose, CA, USA \\
+% ACM xxx-x-xxxx-xxxx-x/xx/xx\ldots \$15.00 \\
+% DOI: \url{http://dx.doi.org/xx.xxxx/xxxxxxx.xxxxxxx}
+% }
+
+% Arabic page numbers for submission.  Remove this line to eliminate
+% page numbers for the camera ready copy
+% \pagenumbering{arabic}
+
+% Load basic packages
+\usepackage{balance}       % to better equalize the last page
+\usepackage{graphics}      % for EPS, load graphicx instead 
+\usepackage[T1]{fontenc}   % for umlauts and other diaeresis
+\usepackage{txfonts}
+\usepackage{mathptmx}
+\usepackage[pdflang={en-US},pdftex]{hyperref}
+\usepackage{color}
+\usepackage{booktabs}
+\usepackage{textcomp}
+
+% Some optional stuff you might like/need.
+\usepackage{microtype}        % Improved Tracking and Kerning
+% \usepackage[all]{hypcap}    % Fixes bug in hyperref caption linking
+\usepackage{ccicons}          % Cite your images correctly!
+\usepackage[utf8]{inputenc} % for a UTF8 editor only
+
+% If you want to use todo notes, marginpars etc. during creation of
+% your draft document, you have to enable the "chi_draft" option for
+% the document class. To do this, change the very first line to:
+% "\documentclass[chi_draft]{sigchi}". You can then place todo notes
+% by using the "\todo{...}"  command. Make sure to disable the draft
+% option again before submitting your final document.
+\usepackage{todonotes}
+
+% Paper metadata (use plain text, for PDF inclusion and later
+% re-using, if desired).  Use \emtpyauthor when submitting for review
+% so you remain anonymous.
+\def\plaintitle{Brazilian Public Software Portal: an integrated platform for collaborative development}
+\def\plainauthor{Paulo Meirelles, Antonio Terceiro, Hilmer Neri, Melissa Wen, Ridrigo Siqueira, Lucas Kanashiro}
+\def\emptyauthor{}
+\def\plainkeywords{Brazilian Public Software, Free/Libre/Open Source Software, Software Evolution, Integrated Platform.}
+\def\plaingeneralterms{Documentation, Standardization}
+
+% llt: Define a global style for URLs, rather that the default one
+\makeatletter
+\def\url@leostyle{%
+  \@ifundefined{selectfont}{
+    \def\UrlFont{\sf}
+  }{
+    \def\UrlFont{\small\bf\ttfamily}
+  }}
+\makeatother
+\urlstyle{leo}
+
+% To make various LaTeX processors do the right thing with page size.
+\def\pprw{8.5in}
+\def\pprh{11in}
+\special{papersize=\pprw,\pprh}
+\setlength{\paperwidth}{\pprw}
+\setlength{\paperheight}{\pprh}
+\setlength{\pdfpagewidth}{\pprw}
+\setlength{\pdfpageheight}{\pprh}
+
+% Make sure hyperref comes last of your loaded packages, to give it a
+% fighting chance of not being over-written, since its job is to
+% redefine many LaTeX commands.
+\definecolor{linkColor}{RGB}{6,125,233}
+\hypersetup{%
+  pdftitle={\plaintitle},
+  pdfauthor={\plainauthor},
+  pdfkeywords={\plainkeywords},
+  pdfdisplaydoctitle=true, % For Accessibility
+  bookmarksnumbered,
+  pdfstartview={FitH},
+  colorlinks,
+  citecolor=black,
+  filecolor=black,
+  linkcolor=black,
+  urlcolor=linkColor,
+  breaklinks=true,
+  hypertexnames=false
+}
+
+% create a shortcut to typeset table headings
+% \newcommand\tabhead[1]{\small\textbf{#1}}
+
+% End of preamble. Here it comes the document.
+\begin{document}
+
+\title{\plaintitle}
+
+\numberofauthors{6}
+\author{%
+  \alignauthor{Paulo Meirelles,\\Hilmer Neri\\
+    \affaddr{Faculty Gama (FGA) \\ University of Bras\'ilia}\\
+    \affaddr{Gama, Brazil}\\
+    \email{\{paulormm,hilmer\}@unb.br}}\\
+  \alignauthor{Antonio Terceiro,\\Melissa Wen\\
+    \affaddr{Colivre}\\
+    \affaddr{Salvador, Brazil}\\
+    \email{\{terceiro,melissa\}@colivre.coop.br}}\\
+  \alignauthor{Rodrigo Siqueira,\\Lucas Kanashiro\\
+    \affaddr{FLOSS Competence Center \\ University of S\~ao Paulo}\\
+    \affaddr{São Paulo, Brazil}\\
+    \email{\{siqueira,ldk\}@ime.usp.br}}\\
+}
+
+\maketitle
+%------------------------------------------------------------------------------
+\input{content/00-abstract}
+%------------------------------------------------------------------------------
+\input{content/01-introduction}
+\input{content/02-spb}
+\input{content/03-arch}
+\input{content/04-features}
+\input{content/05-process}
+\input{content/06-ux}
+\input{content/07-finals}
+
+%------------------------------------------------------------------------------
+\bibliographystyle{SIGCHI-Reference-Format}
+\bibliography{spb}
+\end{document}
@@ -0,0 +1,10 @@		@@ -0,0 +1,10 @@
	1	+.DS_Store
	2	+.sw
	3	+guide.tex
	4	+*.bak
	5	+*.pdf
	6	+*.aux
	7	+*.log
	8	+*.bbl
	9	+*.blg
	10	+*.out
@@ -0,0 +1,15 @@		@@ -0,0 +1,15 @@
	1	+TARGET=spb
	2	+
	3	+all: $(TARGET).tex
	4	+ pdflatex $(TARGET).tex
	5	+ bibtex $(TARGET)
	6	+ pdflatex $(TARGET).tex
	7	+ pdflatex $(TARGET).tex
	8	+ evince $(TARGET).pdf &
	9	+
	10	+edit:
	11	+ gedit Makefile .bib .tex &
	12	+
	13	+clean:
	14	+ rm -f $(TARGET).pdf .out .aux .log .blg .bbl .dvi .ps .toc .lot .lof .idx ~
	15	+
@@ -0,0 +1,221 @@		@@ -0,0 +1,221 @@
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	2	+%% This is file `acmcopyright.sty',
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	4	+%%
	5	+%% The original source files were:
	6	+%%
	7	+%% acmcopyright.dtx (with options: `style')
	8	+%%
	9	+%% IMPORTANT NOTICE:
	10	+%%
	11	+%% For the copyright see the source file.
	12	+%%
	13	+%% Any modified versions of this file must be renamed
	14	+%% with new filenames distinct from acmcopyright.sty.
	15	+%%
	16	+%% For distribution of the original source see the terms
	17	+%% for copying and modification in the file acmcopyright.dtx.
	18	+%%
	19	+%% This generated file may be distributed as long as the
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	39	+\ProvidesPackage{acmcopyright}
	40	+[2014/06/29 v1.2 Copyright statemens for ACM classes]
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	43	+\newif\if@printpermission
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	45	+\newif\if@acmowned
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	60	+ \ifnum\acm@copyrightmode=2\relax % acmlicensed
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	63	+ \ifnum\acm@copyrightmode=3\relax % rightsretained
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	66	+ \ifnum\acm@copyrightmode=4\relax % usgov
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	83	+ \ifnum\acm@copyrightmode=11\relax % licensedothergov
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	87	+\def\setcopyright#1{\setkeys{ACM@}{acmcopyrightmode=#1}}
	88	+\setcopyright{acmcopyright}
	89	+\def\@copyrightowner{%
	90	+ \ifcase\acm@copyrightmode\relax % none
	91	+ \or % acmcopyright
	92	+ ACM.
	93	+ \or % acmlicensed
	94	+ Copyright held by the owner/author(s). Publication rights licensed to
	95	+ ACM.
	96	+ \or % rightsretained
	97	+ Copyright held by the owner/author(s).
	98	+ \or % usgov
	99	+ \or % usgovmixed
	100	+ ACM.
	101	+ \or % cagov
	102	+ Crown in Right of Canada.
	103	+ \or %cagovmixed
	104	+ ACM.
	105	+ \or %licensedusgovmixed
	106	+ Copyright held by the owner/author(s). Publication rights licensed to
	107	+ ACM.
	108	+ \or %licensedcagovmixed
	109	+ Copyright held by the owner/author(s). Publication rights licensed to
	110	+ ACM.
	111	+ \or % othergov
	112	+ ACM.
	113	+ \or % licensedothergov
	114	+ \fi}
	115	+\def\@copyrightpermission{%
	116	+ \ifcase\acm@copyrightmode\relax % none
	117	+ \or % acmcopyright
	118	+ Permission to make digital or hard copies of all or part of this
	119	+ work for personal or classroom use is granted without fee provided
	120	+ that copies are not made or distributed for profit or commercial
	121	+ advantage and that copies bear this notice and the full citation on
	122	+ the first page. Copyrights for components of this work owned by
	123	+ others than ACM must be honored. Abstracting with credit is
	124	+ permitted. To copy otherwise, or republish, to post on servers or to
	125	+ redistribute to lists, requires prior specific permission
	126	+ and\hspace*{.5pt}/or a fee. Request permissions from
	127	+ permissions@acm.org.
	128	+ \or % acmlicensed
	129	+ Permission to make digital or hard copies of all or part of this
	130	+ work for personal or classroom use is granted without fee provided
	131	+ that copies are not made or distributed for profit or commercial
	132	+ advantage and that copies bear this notice and the full citation on
	133	+ the first page. Copyrights for components of this work owned by
	134	+ others than the author(s) must be honored. Abstracting with credit
	135	+ is permitted. To copy otherwise, or republish, to post on servers
	136	+ or to redistribute to lists, requires prior specific permission
	137	+ and\hspace*{.5pt}/or a fee. Request permissions from
	138	+ permissions@acm.org.
	139	+ \or % rightsretained
	140	+ Permission to make digital or hard copies of part or all of this work
	141	+ for personal or classroom use is granted without fee provided that
	142	+ copies are not made or distributed for profit or commercial advantage
	143	+ and that copies bear this notice and the full citation on the first
	144	+ page. Copyrights for third-party components of this work must be
	145	+ honored. For all other uses, contact the
	146	+ owner\hspace*{.5pt}/author(s).
	147	+ \or % usgov
	148	+ This paper is authored by an employee(s) of the United States
	149	+ Government and is in the public domain. Non-exclusive copying or
	150	+ redistribution is allowed, provided that the article citation is
	151	+ given and the authors and agency are clearly identified as its
	152	+ source.
	153	+ \or % usgovmixed
	154	+ ACM acknowledges that this contribution was authored or co-authored
	155	+ by an employee, or contractor of the national government. As such,
	156	+ the Government retains a nonexclusive, royalty-free right to
	157	+ publish or reproduce this article, or to allow others to do so, for
	158	+ Government purposes only. Permission to make digital or hard copies
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	160	+ notice and the full citation on the first page. Copyrights for
	161	+ components of this work owned by others than ACM must be
	162	+ honored. To copy otherwise, distribute, republish, or post,
	163	+ requires prior specific permission and\hspace*{.5pt}/or a
	164	+ fee. Request permissions from permissions@acm.org.
	165	+ \or % cagov
	166	+ This article was authored by employees of the Government of Canada.
	167	+ As such, the Canadian government retains all interest in the
	168	+ copyright to this work and grants to ACM a nonexclusive,
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	172	+ Permission to make digital or hard copies for personal or classroom
	173	+ use is granted. Copies must bear this notice and the full citation
	174	+ on the first page. Copyrights for components of this work owned by
	175	+ others than the Canadain Government must be honored. To copy
	176	+ otherwise, distribute, republish, or post, requires prior specific
	177	+ permission and\hspace*{.5pt}/or a fee. Request permissions from
	178	+ permissions@acm.org.
	179	+ \or % cagovmixed
	180	+ ACM acknowledges that this contribution was co-authored by an
	181	+ affiliate of the national government of Canada. As such, the Crown
	182	+ in Right of Canada retains an equal interest in the copyright.
	183	+ Reprints must include clear attribution to ACM and the author's
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	188	+ To copy otherwise, distribute, republish, or post, requires prior
	189	+ specific permission and\hspace*{.5pt}/or a fee. Request permissions
	190	+ from permissions@acm.org.
	191	+ \or % licensedusgovmixed
	192	+ Publication rights licensed to ACM. ACM acknowledges that this
	193	+ contribution was authored or co-authored by an employee, contractor
	194	+ or affiliate of the United States government. As such, the
	195	+ Government retains a nonexclusive, royalty-free right to publish or
	196	+ reproduce this article, or to allow others to do so, for Government
	197	+ purposes only.
	198	+ \or % licensedcagovmixed
	199	+ Publication rights licensed to ACM. ACM acknowledges that this
	200	+ contribution was authored or co-authored by an employee, contractor
	201	+ or affiliate of the national government of Canada. As such, the
	202	+ Government retains a nonexclusive, royalty-free right to publish or
	203	+ reproduce this article, or to allow others to do so, for Government
	204	+ purposes only.
	205	+ \or % othergov
	206	+ ACM acknowledges that this contribution was authored or co-authored
	207	+ by an employee, contractor or affiliate of a national government. As
	208	+ such, the Government retains a nonexclusive, royalty-free right to
	209	+ publish or reproduce this article, or to allow others to do so, for
	210	+ Government purposes only.
	211	+ \or % licensedothergov
	212	+ Publication rights licensed to ACM. ACM acknowledges that this
	213	+ contribution was authored or co-authored by an employee, contractor
	214	+ or affiliate of a national government. As such, the Government
	215	+ retains a nonexclusive, royalty-free right to publish or reproduce
	216	+ this article, or to allow others to do so, for Government purposes
	217	+ only.
	218	+ \fi}
	219	+\endinput
	220	+%%
	221	+%% End of file `acmcopyright.sty'.
@@ -0,0 +1,14 @@		@@ -0,0 +1,14 @@
	1	+\begin{abstract}
	2	+The Brazilian Public Software is a program by the Brazilian Federal
	3	+Government to foster the sharing and collaboration on FOSS solutions for
	4	+the public administration. In this paper, we present an integrated
	5	+development platform that was developed for the program. The development
	6	+of this platform used several FOSS applications, and contributed
	7	+features back to them. We discuss the development methodology, platform
	8	+architecture, and the user experience efforts carried out.
	9	+\end{abstract}
	10	+
	11	+\category{H.5.m.}{Information Interfaces and Presentation
	12	+ (e.g. HCI)}{Miscellaneous}
	13	+
	14	+\keywords{\plainkeywords}
@@ -0,0 +1,50 @@		@@ -0,0 +1,50 @@
	1	+\section{Introduction}
	2	+\label{sec:intro}
	3	+
	4	+During the last few decades, the Brazilian Federal Government has
	5	+improved its software adoption and development processes. In 2003, the
	6	+recommendation to adopt Free/Open Source Software (FOSS) become a public
	7	+policy. In 2007, the Brazilian Government released a portal called
	8	+Brazilian Public Software (\textit{Software Público Brasileiro} -- SPB,
	9	+in Portuguese), with the goal of sharing FOSS projects developed by, or
	10	+for, the Brazilian Government.
	11	+
	12	+The Brazilian legal instrument on software contracting
	13	+(\textit{Instrução Normativa} 04/2012) mandates that public management
	14	+must consult the SPB Portal to adopt a software solution. The
	15	+acquisition of a proprietary solution must be explicitly justified by
	16	+demonstrating that there is no suitable option in the SPB Portal.
	17	+
	18	+Since 2009, however, the SPB Portal was having several technical issues.
	19	+The original codebase was not being developed anymore, and there as a
	20	+large amount of technical debt to overcome. The system was a modified
	21	+version of an existing FOSS platform that was not being developed
	22	+anymore, and the portal maintenance was becoming harder and harder.
	23	+
	24	+From January 2014 to June 2016, a new platform for the SPB Portal was
	25	+designed and developed by the University of Brasília (UnB) and the
	26	+University of São Paulo (USP) in a partnership with the Brazilian
	27	+Ministry of Budget, Planning, and Management. This new Portal was
	28	+designed as an integrated platform for collaborative software
	29	+development. It includes functionality for social networking, mailing
	30	+lists, version control system, and source code quality monitoring. In
	31	+this paper, we present an overview of this new generation of the SPB
	32	+Portal.
	33	+
	34	+The project was developed by a team of 3 professors, 6 professionals, 2
	35	+masters students, and approximately 40 undergrad students (not all of
	36	+them at the same time, though -- graduations and other events triggered
	37	+changes in the team).
	38	+
	39	+\begin{figure*}[hbt]
	40	+ \centering
	41	+ \includegraphics[width=.9\linewidth]{figures/home-SPB.png}
	42	+ \caption{The new SPB Portal.}
	43	+ \label{fig:spb}
	44	+\end{figure*}
	45	+
	46	+Figure \ref{fig:spb} shows the home page of this integrated platform.
	47	+The development tried to be as faithful as possible to FOSS development.
	48	+All development was done in the open, and the changes we needed in the
	49	+tools user were contributed back to their communities.
	50	+
@@ -0,0 +1,73 @@		@@ -0,0 +1,73 @@
	1	+\section{Brazilian Public Software versus Free/Open Source Software}
	2	+\label{sec:spb}
	3	+
	4	+%TODO: Hilmer
	5	+
	6	+O software livre é considerado um fenômeno recente que ganhou destaque nos
	7	+últimos anos e despertou maior interesse de observação por parte da academia.
	8	+No entanto, desde o início da computação a maior parte dos desenvolvedores
	9	+trabalhava da forma que hoje identificamos como software livre, ou seja,
	10	+compartilhando código de forma aberta. Essa característica faz com que o código
	11	+esteja disponível para inspeção, alteração, e utilização por qualquer pessoa,
	12	+física ou jurídica~\cite{kon2012},
	13	+~\cite{hippel2003}.
	14	+
	15	+Os elementos que diferenciam o software livre de outros tipos de software é o
	16	+entendimento do processo de desenvolvimento, do contexto econômico, da relação
	17	+entre os desenvolvedores e usuários, além das características éticas e legais
	18	+que se relacionam ao software. No contexto do software livre é promovida a
	19	+liberdade do usuário e seu desenvolvimento tem alicerce
	20	+em colaboração e desenvolvimento aberto.\cite{meirelles2013}.
	21	+
	22	+Do ponto de vista econômico, diferentemente do que ocorre com o software
	23	+proprietário, restrito, o software livre promove o estabelecimento de vários
	24	+fornecedores que competem entre si com base no mesmo software. Essa competição
	25	+mais forte entre fornecedores traz vantagens para os usuários, pois dá melhores
	26	+garantias quanto ao desenvolvimento futuro do sistema e induz a uma redução nos
	27	+preços. Essas liberdades e garantias sobre o software são estabelecidas no
	28	+Brasil pela Lei 9610/98, lei de direitos autorais. Na sua maioria das vezes,
	29	+essa proteção decorrente da lei segue aliada aos termos conferidos por um
	30	+contrato atinente a determinado software. Esse contrato é denominado
	31	+``licença''. A licença de um software estabelece um rol de direitos e deveres
	32	+que se projetam sobre um determinado usuário do software. Em especial, o que
	33	+diferencia o software livre do software restrito é apenas a forma de
	34	+licenciamento\cite{sabino2009}. As licenças de software livre são o
	35	+que garantem o direito de executar, estudar, adaptar, e aperfeiçoar o software,
	36	+como por exemplo as licenças \textit{GPL (GNU General Public License)} aceitas
	37	+para projetos hospedados no portal do software público brasileiro.
	38	+
	39	+O Portal do Software Público Brasileiro (SPB), inaugurado em 2007, na prática,
	40	+é um sistema web que se consolidou como um ambiente de compartilhamento de
	41	+projetos de software. Oferece um espaço (comunidade) para cada software. Por
	42	+isso, a atual plataforma para o SPB foi pensada para contemplar ferramentas que
	43	+promovam a colaboração e a interação nas comunidades (por gestores, usuários e
	44	+desenvolvedores) dos projetos, conforme as práticas usadas nas comunidades de
	45	+software livre. Isso inclui listas de e-mail, fóruns de discussão, issue
	46	+trackers, sistemas de controle de versão e ambientes de rede
	47	+social.
	48	+
	49	+Inicialmente, o propósito do Portal era apenas compartilhar os softwares
	50	+desenvolvidos no governo, visando diminuir os custos de contratação de
	51	+software. Entretanto, se observou que ao disponibilizar os softwares
	52	+rapidamente formaram-se comunidades em torno daquele software com diversas
	53	+pessoas colaborando e compartilhando os resultados obtidos através do uso
	54	+daquelas soluções. Dessa forma, algumas cooperativas de desenvolvimento de
	55	+software e empresas privadas demonstraram o interesse em disponibilizar seus
	56	+softwares na plataforma do SPB.
	57	+
	58	+O conceito de software público diferencia-se do de software livre em alguns
	59	+aspectos, destacando-se a atribuição de bem público ao software e a
	60	+obrigatoriedade do software estar no Portal do Software Público. Embora haja
	61	+algumas diferenças entre o que é um software livre e um software público
	62	+brasileiro, há princípios comuns, como a tendência da descentralização na
	63	+tomada de decisões, o intenso compartilhamento de informações e os processos de
	64	+retroalimentação decorrentes do uso dos artefatos produzidos. Por um lado, o
	65	+software livre se apresenta atualmente como um modelo já consolidado e viável
	66	+em um número crescente de aplicações e ambientes. Por outro lado, restam
	67	+incertezas jurídicas e econômicas. Alguns desses desafios estão vinculados às
	68	+barreiras criadas pelo modelo e cultura do software
	69	+restrito~\cite{kon2012}. Além dessas, existem também as dificuldades
	70	+para a entrada e a permanência de novos contribuidores nos projetos. A questão
	71	+que motivou esta pesquisa é que essas dificuldades podem ser maiores no
	72	+contexto dos projetos de software público brasileiro, devido à estrutura
	73	+organizacional e aos processos do Governo Federal.
@@ -0,0 +1,105 @@		@@ -0,0 +1,105 @@
	1	+\section{Architecture}
	2	+\label{sec:architecture}
	3	+
	4	+%TODO: Kanashiro e Siqueira
	5	+
	6	+The two main requirements provided by the Brazilian Federal Government
	7	+for the new platform were:
	8	+%
	9	+1) \textit{Integrate existing FOSS systems}, with minimal differences
	10	+from their original versions. This way, the platform can benefit from
	11	+improvements done by the upstream communities that provide those
	12	+systems, and the maintenance effort that is specific for the SPB Portal
	13	+should be reduced;
	14	+%
	15	+and
	16	+2) \textit{Provide a consistent user interface} across the different
	17	+systems, as well as centralized authentication.
	18	+
	19	+The first requirement was accomplished by dedicating specialized teams
	20	+for each system that was being integrated. The teams would learn how to
	21	+develop their assigned systems, and contribute the necessary features
	22	+directly to the original communities, so that the version we used was
	23	+not significantly different from the original. Of course, at times
	24	+project deadlines forced us to use our own version before tho features
	25	+were fully reviewed and integrated upstream to the original projects,
	26	+but we managed to contribute the vast majority of the changes back.
	27	+
	28	+For the second requirement, we integrated a web integration platform
	29	+called Colab\footnote{\url{https://github.com/colab/colab}}. Colab
	30	+serves as a frontend for other web applications as a reverse proxy,
	31	+manages authentication, and can apply changes to the HTML provided by
	32	+the integrated applications in order to provide visual consistency.
	33	+Colab had support for an initial set of applications (Trac, GNU Mailman,
	34	+Apache Lucene) hard-coded; our team evolved Colab so that it can now
	35	+receive plugins to add support for new applications with minimal changes
	36	+to its existing core. We added support for the other applications used
	37	+in the SPB platform: Noosfero, GitLab, and Mezuro.
	38	+
	39	+Noosfero\footnote{\url{http://noosfero.org/}} is a software for building
	40	+social and collaboration networks. Besides the classical social
	41	+networking features, it also provides publication features such as blogs
	42	+and a general-purpose CMS (Content Management System). Most of the user
	43	+interactions with SPB is through Noosfero: user registration, project
	44	+home pages and documentation, and contact forms.
	45	+GitLab\footnote{\url{http://gitlab.com/}} is a web-based Git repository
	46	+manager with wiki pages and issue tracking features.
	47	+Mezuro\footnote{\url{http://mezuro.org/}} is a platform to collect source code
	48	+metric to monitor the internal quality of softwares written in C, C++,
	49	+Java, Python, Ruby, and PHP. GNU Mailman is used for mailing lists.
	50	+
	51	+\begin{figure}[hbt]
	52	+ \centering
	53	+ \includegraphics[width=\linewidth]{figures/arch.png}
	54	+ \caption{SPB architecture overview.}
	55	+ \label{fig:architecture}
	56	+\end{figure}
	57	+
	58	+The conceptual architecture of the platform is presented in Figure
	59	+\ref{fig:architecture}. Colab initially handles all user interaction,
	60	+directing requests to one of the integrated applications. It
	61	+post-processes responses from the applications to apply a consistent
	62	+visual appearance, manages authentication, and provides a unified search
	63	+functionality: instead of using the redundant restricted search
	64	+functionality of each application, a search in the SPB portal might
	65	+return content from any of the applications, be it web pages, mailing
	66	+list posts, or source code.
	67	+
	68	+%TODO: deixar coeso daqui para baixo
	69	+
	70	+\begin{figure*}[hbt]
	71	+ \centering
	72	+ \includegraphics[width=\linewidth]{figures/arch2.png}
	73	+ \caption{Instanciation view of the SPB architecture.}
	74	+ \label{fig:architecture2}
	75	+\end{figure*}
	76	+
	77	+In real, the SPB platform was deployed in 7 virtual machines with different functions,
	78	+as we can see in Figure \ref{fig:architecture2}.
	79	+
	80	+The \textit{reverseproxy} handles the HTTP requests and redirects them to the
	81	+\textit{integration}, the \textit{email} sends and receives e-mails on behalf
	82	+of the platform and the \textit{monitor} keeps the entire environment tracked.
	83	+These three \textit{VMs} mentioned - \textit{reverseproxy}, \textit{email} and
	84	+\textit{monitor} - are accessible via Internet and the other ones are only
	85	+available in the local network created between them.
	86	+
	87	+\textit{Integration} works as a second layer of proxy beneath
	88	+\textit{reverseproxy}, any request to the platform will be handled by it. The
	89	+Colab service provides interface, authentication and search engine integration
	90	+among all the services. When a request is received to a specific service,
	91	+Colab authenticates the user in the target tool, sends the request and makes a
	92	+visual transformation in the HTML page which is the content of the response.
	93	+Another user-oriented feature is the integrated search engine, when the user
	94	+want to find something in the platform Colab will perform the search in the
	95	+whole databases. Colab itself provides a web interface for GNU Mailman and we
	96	+have two others integrated tools in \textit{integration}: Gitlab and Prezento.
	97	+Gitlab provides web interface for Git repositories and issues tracker, and
	98	+Prezento is a front-end for source code static analysis.
	99	+
	100	+The source code static analysis is performed by \textit{mezuro}. It runs some
	101	+static analysis tools on source code stored in repository and provide this data
	102	+to Prezento. A social network and CMS (Content Manager System) is provided by
	103	+Noosfero in \textit{social}, and the databases of all tools with a cache
	104	+service are in \textit{database}.
	105	+
@@ -0,0 +1,8 @@		@@ -0,0 +1,8 @@
	1	+\section{Features}
	2	+\label{sec:spb}
	3	+
	4	+%TODO: Paulo e Melissa
	5	+
	6	+...
	7	+
	8	+
@@ -0,0 +1,6 @@		@@ -0,0 +1,6 @@
	1	+\section{Development Organization and Process}
	2	+\label{sec:process}
	3	+
	4	+%TODO: Siqueira e Hilmer
	5	+
	6	+...
@@ -0,0 +1,33 @@		@@ -0,0 +1,33 @@
	1	+\section{User eXperience evolution}
	2	+
	3	+The integration of collaborative environments goes beyond functional aspects.
	4	+Offering the population an unified experience across these environments has
	5	+been the key to encourage the use of the platform as it reduces the perception
	6	+of complexity. Thus, the SPB Portal information architecture was redesigned
	7	+to provide a transparent navigation and to reach users with different profiles.
	8	+A process of harmonization has been employed on the interaction models of each
	9	+tool to reduce the learning curve. At the same time, a new visual style was
	10	+created to unify the navigation experience and to comply with the guidelines of
	11	+the digital communication identity standard established by the Federal
	12	+Government.
	13	+
	14	+With the increase in system features and the addition of new tools, the
	15	+visual style has steadily evolved to keep the navigation unified. Moreover,
	16	+tools from different backgrounds, which in many cases provide similar
	17	+functionality, prompted the development of an unified interface. Some
	18	+features, such as search and user profile editing were eliminated from
	19	+the individual applications, and implemented centrally to ensure a
	20	+consistent look and feel.
	21	+
	22	+Another challenge was responsive web design. The integrated applications
	23	+had varying degrees of support for responsiveness, and the common
	24	+interface had to adapt for each individual scenario. In particular
	25	+Noosfero did not yet have a responsive design; we engaged in its
	26	+development and contributed towards that goal.
	27	+
	28	+After the initial release of the new SPB Portal in 2014, several
	29	+validations activities were implemented in 2015 and 2016. The aim was to
	30	+provide the most wanted features by casual users (such as public
	31	+servants interested in downloads and documentation) immediately, while
	32	+allowing more experienced users (such as developers) to easily drill down
	33	+to the details.