Pii: S0306-4573(99)00071-0

Pii: S0306-4573(98)00049-1

Experimentation as a way of life: Okapi at TREC

The Okapi system has been used in a series of experiments on the TREC collections, investigating probabilistic models, relevance feedback and query expansion, and interaction issues. The TREC-6 ad hoc task was used to test an application of a new relevance weighting formula, which takes account of documents judged nonrelevant. The application was to a form of blind feedback (using the top-ranke...

Information behavior in dynamic group work contexts: interwoven situational awareness, dense social networks and contested collaboration in command and control

In many dynamic work situations, no single individual can acquire the varied and often rapidly expanding information needed for success. Individuals must work together to collect, analyze, synthesize and disseminate information throughout the work process. Perhaps one of the most dynamic work contexts is command and control in the military at the battalion level which directs 300 to 1000 soldie...

Adapting a diagnostic problem-solving model to information retrieval

In this paper a competition based connectionist model for diagnostic problem solving is adapted to information retrieval In this model we treat documents as disorders and user information needs as manifestations and a competitive activation mechanism is used which converges to a set of documents that best explain the given user information needs By combining the ideas of Bayesian inferencing an...

Constructing and navigating personalised views of the Web

WebClass is a system that allows Web users to create personalised conceptual data which is dynamically merged with original HTML source by a specialised proxy server. This allows groups of users to share \views" of the World Wide Web that include conceptual information such as annotations and subject information. WebClass records paths followed by users during Web exploration. Graph traversal o...