Information Retrieval of Distributed Databases A Case Study: Search Engines Systems

This research investigates information retrieval from distributed databases. The most popular example of such systems are the regular web search engines. Thus, this paper discusses in depth the search engines systems and have made an evaluation of different search engines based on popular queries searched. We first explores the structure of the search engines and explain its functions behind the scenes, how they can get the results for a specific query. The key idea behind search engines is the ranking algorithms used to bring the appropriate results. This research has chosen Google, Yahoo, and Bing to do evaluation experiments, since they are top search engines used nowadays.