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Talks & Seminars
Semantic Graphs and their Applications, and Lexical Knowledge Networks
Prof. Pushpak Bhattacharya, IITB
Date & Time: October 3, 2007 10:45
Venue: F. C. Kohli Auditorium (KR building)
Abstract:
Lexical resources like wordnets and ontologies form essential steps towards capturing computational semantics. We have had long standing work at IIT Bombay on creating intermediary semantic networks from natural language texts for the dual purpose of machine translation and Cross Lingual IR. In this talk, we will dwell on three topics (i) semantics extraction as a two stage process of detecting semantically relatable sequences and then generating semantic graphs, (ii) the use of such semantic graphs in MT and CLIR and (iii) creating lexical infrastructure in the form of multilingual wordnets and investigating their structural properties. We find that wordnets of English and Indian languages exhibit "small world properties", and parameters like cluster coefficient, shortest path, degree density show uniformity in a languages independent way.

Adhering to the requirement of making these seminars generally accessible, we will start the presentation with remarks on the need for natural language processing research and the challenges involved therein. Numerous examples throughout the presentation should bring home the essential ideas lucidly.
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