introduction:the human being always attempts to find a way to improve his physical and mental abilities. history shows that, despite the many promotions in every branch of science and technology, we cannot see much improvement in thinking abilities. with the advent of the iinternet and www, many thought that the problem will be solved. but nowadays we can see that the main problem remains: the ...

Online evaluation is one of the most common approaches to measure the effectiveness of an information retrieval system. It involves fielding the information retrieval system to real users, and observing these users’ interactions in-situ while they engage with the system. This allows actual users with real world information needs to play an important part in assessing retrieval quality. As such,...

Information retrieval systems help filter information, so that the process of finding suitable information becomes fast and precise, but there are ways to find more effectively efficiently with using bibliometric methods VOSviewer application. The research objectives map trends results on topic system in library, library based co-authorship, co-occurrence. method uses descriptive analysis by Sc...

In November of 1992 the first Text REtrieval Conference (TREC-1) was held at NIST (Harman 1993). This conference, co-sponsored by ARPA and NIST, brought together information retrieval researchers to discuss their system results on the new TIPSTER test collection. This was the first time that such groups had ever compared results on the same data using the same evaluation methods, and represente...

This paper describes a first prototype system for contentbased retrieval from XML data. The system’s design supports both XPath queries and complex information retrieval queries based on a language modelling approach to information retrieval. Evaluation using the INEX benchmark shows that it is beneficial if the system is biased to retrieve large XML fragments over small fragments.