Graduation Semester and Year

2012

Language

English

Document Type

Thesis

Degree Name

Master of Science in Computer Science

Department

Computer Science and Engineering

First Advisor

Chengkai Li

Abstract

We are surrounded by data in various forms such as instant messages, Twitter tweets, Facebook status updates, news, media, blogs and much more. Extracting meaning from such a massive collection of unstructured data would lead to interesting stories. Examples of such stories can be ``\emph{Who was the most popular actor in a particular month}''or ``\emph{Which diseases were people most concerned about in year 2008}''. In this thesis, we propose to discover popular entities mentioned in blog articles based on the concept of prominent streak. Given a sequence of values for a named entity (e.g., a person, a place, etc.), where each value is the occurrence frequency of the entity in blog articles during a corresponding period of time, a prominent streak is a long consecutive subsequence of only large (small) values. Whether a streak is prominent also depends on how it fares against streaks for comparable entities. Using the distributed data processing framework Mapreduce, particularly Hadoop which is one of its open-source implementations, we find entity occurrences in a set of blog articles with a trie-based data structure. Prominent streak discovery algorithms are applied over the detected sequences of entities occurrences to derive interesting stories. Our experiments and evaluation are done over the ICWSM'09 Spinn3r blog dataset, which contains over 44 million blog articles for the months of August and September in 2008.

Disciplines

Computer Sciences | Physical Sciences and Mathematics

Comments

Degree granted by The University of Texas at Arlington

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