• Publications
  • Influence
Friends and neighbors on the Web
It is shown that some factors are better indicators of social connections than others, and that these indicators vary between user populations. Expand
Free Riding on Gnutella
It is argued that free riding leads to degradation of the system performance and adds vulnerability to the system, and copyright issues might become moot compared to the possible collapse of such systems. Expand
How to search a social network
It is found that small world search strategies using a contact’s position in physical space or in an organizational hierarchy relative to the target can effectively be used to locate most individuals, but in the online student network, where the data is incomplete and hierarchical structures are not well defined, local search strategies are less effective. Expand
Tracking information epidemics in blogspace
This paper describes a novel inference scheme that takes advantage of data describing historical, repeating patterns of "infection" to track information flow in blogspace, as well as a visualization system that allows for the graphical tracking of information flow. Expand
GUESS: a language and interface for graph exploration
GUESS is a novel system for graph exploration that combines an interpreted language with a graphical front end that allows researchers to rapidly prototype and deploy new visualizations and contains a novel, interactive interpreter. Expand
Information re-retrieval: repeat queries in Yahoo's logs
It is demonstrated that changes to search engine results can hinder re-finding, and a way to automatically detect repeat searches and predict repeat clicks is provided. Expand
Tycoon: An implementation of a distributed, market-based resource allocation system
Distributed clusters like the Grid and PlanetLab enable the same statistical multiplexing efficiency gains for computing as the Internet provides for networking. One major challenge is allocatingExpand
Valuating privacy
It is found with great significance that a linear relationship exists between an individual's belief about a trait and the value he or she places on it, and the less desirable the trait, the greater the price a person demands for releasing the information. Expand
Haystack: per-user information environments
The Haystack project emphasizes the relationship between a particular individual and his corpus, and an individual's own haystack priviliges information with which that user interacts, gathers data about those interactions, and uses this metadata to further personalize the retrieval process. Expand
DataTone: Managing Ambiguity in Natural Language Interfaces for Data Visualization
This work model ambiguity throughout the process of turning a natural language query into a visualization and use algorithmic disambiguation coupled with interactive ambiguity widgets to resolve ambiguities by surfacing system decisions at the point where the ambiguity matters. Expand