A. K. Sharma

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—Multicast plays an important role in implementing the group communications in bandwidth scarce multihop mobile ad hoc networks. However, due to the dynamic topology of MANETs it is very difficult to build optimal multicast trees and maintaining group membership, making even more challenging to implement scalable and robust multicast in Mobile Ad hoc(More)
The World Wide Web is an interlinked collection of billions of documents. Ironically the very size of this collection has become an obstacle for information retrieval. The user has to sift through scores of pages to come upon the information he/she desires. Web crawlers are the heart of search engines. <b>Mercator</b> is a scalable, extensible web crawler,(More)
—Ranking thousands of web documents so that they are matched in response to a user query is really a challenging task. For this purpose, search engines use different ranking mechanisms on apparently related resultant web documents to decide the order in which documents should be displayed. Existing ranking mechanisms decide on the order of a web page based(More)