Getting lost in e-mail spaces? This question arises from the increasing use of e-mail, which results in users being inundated by a huge stream of incoming documents. This paper presents a possible solution CIFS. Our cognitive information filtering system consists of the following parts: (1) linguistic analysis to obtain consistent representations of the contents of e-mails with the help of a mo...

Many evaluation measures in Information Retrieval (IR) can be viewed as simple user models. Meanwhile, search logs provide us with information about how real users search. This paper describes our attempts to reconcile click log information with user-centric IR measures, bringing the measures into agreement with the logs. Studying the discount curve of NDCG and RBP leads us to extend them, inco...

This paper describes analyses of the repeated use of search engines. It is shown that users commonly re-issue queries, either to examine search results deeply or simply to query again, often days or weeks later. Hourly and weekly periodicities in behavior are observed for both queries and clicks. Navigational queries were found to be repeated differently from others.

The location of facilities anywhere in an area in which several competing facilities already exist and serving the demand points has been brought to light in this work. Because of the great importance of health care systems in the health of the people, these systems have been studied in the present paper. Creation and maintenance of competitive advantage in health care systems requires optimizi...