My current research interests are in structural and algorithmic graph theory – a field connecting pure mathematics with theoretical computer science. I am particularly interested in studying ways to cope with (hard) optimization problems on graphs. In these problems, it is often desirable to find a particular substructure of a graph that is optimal with respect to some criteria. A general frame...

Language is not one representation but many. A spoken utterance can be characterized as a string of phonemes, a nested set of prosodic phrases, a series of lexical items, a hierarchically-organized syntactic tree, a configuration of semantic relations, or the impetus for inferences about the speaker’s intentions. A fundamental challenge for the psychology of language is to understand the relati...

With the ever increasing popularity of web technologies, it is very common nowadays for people to discuss events, tasks and personal experiences in social media (e.g., Facebook, Twitter, blogs, fora) and email. These are examples of asynchronous conversations where participants communicate with each other at different times. The huge amount of textual data generated everyday in these conversati...

Currently a new version of the distance education platform WeLearn [3] to be combined with an agent system ([1], also developed locally) for providing advanced services [2] is under development. In a previous stage of the project software was created to automatically derive keywords from documents, either from the different versions of metadata already contained (various Microsoft file formats,...

D , high-performance software has always been difficult. Two contemporary challenges exacerbate matters further: the ubiquity of multi-core processors, which demand parallel software, and the increasing size and intricacy of software projects. My research program is motivated by my first-hand experience of these challenges as a developer and researcher. I seek to () raise the a...

Even though advances in hardware technologies are constantly pushing the limits of computational and storage resources, there are always applications whose computational demands exceed even the fastest technologies available. Hence, it has become critical to look into ways to aggregate efficiently distributed resources to benefit a single application. Achieving this vision requires being able t...

My dissertation research developed reliable and available servers capable of running unmodified shared-memory applications. In collaboration with my colleagues at CMU, I proposed the TRUSS (Total Reliability Using Scalable Servers) architecture [3], which allows designers to separately address processor, memory, and I/O reliability. My thesis work shows that redundant processor pairs can be dis...

My general research interests are within the area of text information management. Text information, notably the various types of online information, is continuously produced everywhere in every possible way. The dramatic growth of text information has brought changes to many aspects of one’s daily life. Even in our own research, online text information, such as scientific literature and technic...

A multidisciplinary research background I earned my Ph.D. in Information Science at Rutgers University, M.A. degree in Computermediated Communication at University of Florida, and B.A. in Management Information Systems at National Sun-Yat-Sen University in Taiwan. My multidisciplinary education backgrounds provide me a unique and novel perspective in studying information systems and enable me t...