Keyword-matching systems based on simple models of semantic relatedness are inadequate at modelling the ambiguities in natural language text, and cannot reliably address the increasingly complex information needs of users. In this paper we propose novel methods for computing semantic relatedness by spreading activation energy over the hyperlink structure of Wikipedia. We demonstrate that our te...

Dynamic traces retrieval utilizes information retrieval techniques to automatically generate links as opposed to manually constructing and maintaining links using traditional traceability methods. However, the dynamic method is facing a challenge of low precision in the trace retrieval results. This paper describes a strategy to improve the precision of the retrieval results by integrating phra...

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WWW is the most popular and interactive medium to disseminate information. It creates many new challenges. Several initiatives have been taken to extract different kinds of knowledge from web. In our paper “Leader-page Resources in the World Wide Web” we defined a new method to rank the web pages entirely using the hyperlink information. The notion of “Leader-Page” is extended from the concept ...

Soft Switcing techniques have recently been applied in the design of dc-ac converters, in order to achive better performance, higher efficiency, and power density. One of the soft switching techniques uesd in inverters is resonant dc links. These topologies have some disadvantages such as irregular current peaks, large voltage peaks, uncotrollble pulse width, etc. Another soft switching method ...

Search engines are used to catalog and organize the vast amount of information available on the internet. Engines use linear algebra to match a user query to words within a document, and also use a matrix model of the hyperlink structure of the internet to determine the inherent worth of each page. This ranking is used to organize results when returned to the user.

OBJECTIVES Telephone follow-up is not currently recommended as a strategy to improve retention in randomized trials. The aims of this study were to estimate the effect of telephone follow-up on retention, identify participant characteristics predictive of questionnaire completion during or after telephone follow-up, and estimate the effect of including participants who provided follow-up data d...

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We characterize the position value for arbitrary hypergraph communication situations. The position value is first presented by the Shapley value of the uniform hyperlink game or the k-augmented uniform hyperlink game, which are obtained from the given hypergraph communication situation. These results generalize the non-axiomatic characterization of the position value for communication situation...