International Conference on Knowledge Discovery and Information Retrieval

[img_assist|nid=2959|title=|desc=|link=none|align=left|width=200|height=34]KDIR is one of three conferences held simultaneously under the umbrella of the IC3K, located in Valencia, Spain. This joint conference strongly supports the communication of scientists of different research areas. The opening keynote was held by Rudi Studer, summarizing current approaches in the Semantic Web area. The speaker of the closing keynote was Oscar Pastor, who shared insights into the state-of-the-art of computer-aided genetic research.

The New Media Technology Department presented latest work on sentiment detection - more specifically, an approach to automatically extend sentiment lexicons without the need for human annotators. Sentiment lexicons as the basis of each sentiment detection system play a very important role. Yet, since manual annotation is time-consuming and requires (expensive) human annotators, an automated approach is desirable. The work presented at KDIR tackles this problem. It utilizes and compares information retrieval techniques to identify possible new sentiment terms in free-text documents of unknown sentiment: (i) Latent Semantic Analysis, (ii) Pointwise Mutual Information-Information Retrieval, and (iii) Co-Occurrence Analysis.