https://www.hlt.inesc-id.pt/wiki/index.php?action=history&feed=atom&title=MSc_defense_practice_20081014 2026-05-14T22:23:47Z Revision history for this page on the wiki MediaWiki 1.41.0 https://www.hlt.inesc-id.pt/wiki/index.php?title=MSc_defense_practice_20081014&diff=5455&oldid=prev 2009-06-01T11:04:05Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 11:04, 1 June 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l47">Line 47:</td> <td colspan="2" class="diff-lineno">Line 47:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:Seminars]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:Seminars]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:Seminars 2008]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[category:Seminars 2008]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[category:MSc Proposal]]</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[category:Rehearsals]]</ins></div></td></tr> </table>

Joana https://www.hlt.inesc-id.pt/wiki/index.php?title=MSc_defense_practice_20081014&diff=5064&oldid=prev 2008-10-14T09:46:52Z

<p></p> <p><b>New page</b></p><div>__NOTOC__<br /> {{infobox|name=Tiago Luís|username=tmcl|contact=tmcl<br /> |phone=+351-213-100-300 ext. 2514|fax=+351-213-145-843<br /> }}<br /> <br /> == Title ==<br /> <br /> * Parallelization of Natural Language Processing Algorithms on Distributed Systems<br /> <br /> == Date ==<br /> <br /> * 17:30, October 14, 2008<br /> * Room 336<br /> <br /> == Speaker ==<br /> <br /> * [[Tiago Luís]]<br /> <br /> == Abstract ==<br /> <br /> Natural language processing (NLP) is a subfield of artificial intelligence and<br /> linguistics that studies the problems inherent to the processing of natural<br /> language. This area deals with large collections of data that require<br /> significant resources, both in terms of space and processing time. Currently,<br /> persistent space costs have declined, allowing on the one hand, growth and<br /> wealth of description of the data, and on the other hand, increase of the<br /> amount of data to process. Despite the fall of persistent storage costs, the<br /> processing of these materials is a computation-heavy process and some<br /> algorithms continue to take weeks to produce their results.<br /> <br /> One of the computation-heavy linguistic tasks is annotation. Annotation is<br /> the process of adding linguistic information to language data or the linguistic<br /> annotation itself. Moreover, when these tools are integrated, several problems<br /> related with information flow between these tools may arise. For example, a<br /> given tool may need an annotation previously produced by another tool but some<br /> of this linguistic information can be lost in conversions between the<br /> different tool data formats due to differences in expressiveness.<br /> <br /> The developed framework simplifies the integration of independently existing<br /> NLP tools to form NLP systems without information losses between them. Also, it<br /> allows the development of scalable and language-independent NLP systems on top<br /> of the Hadoop framework, offering a friendly programming environment and<br /> a transparent handling of distributed computing problems, like fault tolerance<br /> and task scheduling. With this framework we achieved speedup values around 40 on a<br /> cluster with 80 cores.<br /> <br /> [[category:Seminars]]<br /> [[category:Seminars 2008]]</div>

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