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When making a choice in the absence of decisive first-hand knowledge, choosing as other like-minded, similarly-situated people have successfully chosen in the past is a good strategy — in effect, using other people as filters and guides: filters to strain out potentially bad choices and guides to point out potentially good choices. Current human-computer(More)
In this paper we report on an ongoing statistical analysis of actual CCSN traffic data. The data consist of approximately 170 million signaling messages collected from a variety of different working CCS subnetworks. The key findings from our analysis concern: (1) the characteristics of both the telephone call arrival process and the signaling message(More)
A prime business concern is knowing your customer. One legacy carried into the present from the earliest NCSA web servers is web server logs. While there are more powerful user tracking techniques, such as requiring logins or storing cookies, server logs remain a powerful tool in helping understand customer activity on a web site, and are the only tool when(More)
We are conducting an ongoing experiment into the effects of various forms of recommendations on consumer behavior at a web site. In this paper, we report on measures of the usefulness and effectiveness of recommendations based on content. During a three month period, we provided recommendations on over 2000 products at an e-commerce web site. To evaluate(More)
Formative writing systems with automated scoring provide opportunities for students to write, receive feedback, and then revise essays in a timely iterative cycle. This paper describes ongoing investigations of a formative writing tool through mining student data in order to understand how the system performs and to measure improvement in student writing.(More)
Background: Verbal fluency tasks, which require producing as many words in response to a cue in a fixed time, are widely used within clinical neuropsychology and in neuropsycho-logical research. Although semantic word lists can be elicited, typically only the number of words related to the cue is interpreted thus ignoring any structure in the word(More)
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