PhD, Information and Library Science, North Carolina
Areas of ResearchInformation retrieval in emerging domains such as social media and large collections of digitized books; temporal (diachronic) issues in information retrieval; human interactions with information search and retrieval systems.
Other Professional AppointmentsDepartment Affiliate, Computer Science
Teaching this Semester
- LIS452AG Foundations Info Proc in LIS (FA 2014)
- LIS452AU Foundations Info Proc in LIS (FA 2014)
- LIS501D Info Org and Access (FA 2014)
Microblogging services like Twitter are becoming an important part of how many people manage information in their day to day activities. As microblog traffic increases (Twitter currently sees about 50 million tweets per day) information management and organization will become keen problems in this area. The project will define the core problems in microblog search and propose solutions to these challenges in the form of both theoretical models and prototype search systems.
In order for older texts to be searchable, contemporary English needs to be translated into language from various historical timeframes. The project will develop software that will let people enter a query in contemporary English, and search over English texts throughout history—from Medieval times to the present day. The project will mostly involve training statistical models that assign probabilities of the translation to a word or phrase in a target English language.
Time affects information retrieval in many ways. Collections of documents change as new items are indexed. The content of documents themselves may change. Users submit queries at particular moments in time. And perhaps most importantly, people’s assessment of a document’s relevance to a query is often time-dependent. For example, searchers of news archives might seek information on a past event where relevant documents cluster in a window of time. Users of social media services such as...
Completed Research Projects
In the News
Oct. 25, 2013
Aug. 21, 2013
May. 22, 2013
May. 14, 2013
Nov. 30, 2012