Date: January 24, 2008 (Thursday) Time: 4:30p.m.

1. 微軟香港中文大學利群計算及界面科技聯合實驗室學生專題討論會微軟香港中文大學利群計算及界面科技聯合實驗室學生專題討論會 Microsoft-CUHK Joint Laboratory forHuman-centric Computing and Interface Technologies Student Seminar January 24, 2008 (Thursday) Shing Kai CHAN Master Student Dept. of Systems Engineering and Engineering Management The Chinese University of Hong Kong Title Unsupervised Method to Incorporate Semantic Meanings with an Anchor Space for Improving Story Segmentation Abstract: News story segmentation is the task of segmenting a stream of multimedia news video/audio into news stories. It is an important prerequisite of other retrieval related tasks in the domain of news information retrieval. This seminar introduces the work that uses a semantic anchor space to improve segmentation of text transcripts of MSNBC news. This work highlights the importance of representing the underlying text in a certain form of semantic representation. We apply clustering on auxiliary source of news data to form the vectors of an anchor space, onto which the original word vectors in the news transcript are mapped. A modified version of the traditional algorithm for text segmentation is then applied, and the results are compared with those by traditional algorithms. Our work exhibits improvement of segmentation performance under some conditions, and it sheds light on directions for possible future improvements of segmentation tasks. About the speaker: CHAN Shing Kai is now a year 2 master of philosophy student from the Department of Systems Engineering and Engineering Management, the Chinese University of Hong Kong. He was graduated from the same university with first class honor in Computer Engineering in 2006. Currently a member of the Human-Computer Communications Laboratory (HCCL), he works under the supervision of Professor Helen MENG on the topic of automatic story segmentation of Chinese broadcast news. His paper entitled “Modeling the Statistical Behavior of Lexical Chains to Capture Work Cohesiveness for Automatic Story Segmentation” was published in the INTERSPEECH 2007 held in Antwerp, Belgium. His research interests include information retrieval, natural language processing and speech processing. Date: January 24, 2008 (Thursday) Time: 4:30p.m. Venue: Room 513, William M.W. Mong Engineering Building, The Chinese University of Hong Kong ALL ARE WELCOME * Light refreshment will be served after 4:00p.m. Inquiries: Linda MA (tsma@se.cuhk.edu.hk), +852-26098304 Details: http://www.cuhk.edu.hk/ms-cu-jl