My current research focuses on gaze-enhanced interaction, the temporal dynamics of information systems, user modeling and personalization, novel interfaces for interactive retrieval, and search evaluation. Previous research studied a variety of information access and management challenges, including personal information management, desktop search, question answering, text categorization, collaborative filtering, interfaces for improving search and navigation, and user/task modeling. I have worked closely with several Microsoft groups (Bing, Windows Desktop Search, SharePoint Portal Server and Office Online Help) on search-related innovations.