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His research interests include knowledge management. Web analysis and mining, artificial intelligence, business intelligence applications, and human-computer interaction. He is author of more than 120 articles covering medical informatics, homeland security, semantic retrieval, search algorithms, knowledge management, and Web computing in leading(More)
Research shows that recommendations comprise a valuable service for users of a digital library [11]. While most existing recommender systems rely either on a content-based approach or a collaborative approach to make recommendations, there is potential to improve recommendation quality by using a combination of both approaches (a hybrid approach). In this(More)
C oncern about national security has increased significantly since the terrorist attacks on 11 September 2001. The CIA, FBI, and other federal agencies are actively collecting domestic and foreign intelligence to prevent future attacks. These efforts have in turn motivated local authorities to more closely monitor criminal activities in their own(More)
While the Web has become a worldwide platform for communication, terrorists share their ideology and communicate with members on the " Dark Web " —the reverse side of the Web used by terrorists. Currently, the problems of information overload and difficulty to obtain a comprehensive picture of terrorist activities hinder effective and efficient analysis of(More)
Nowadays, information overload hinders the discovery of business intelligence on the World Wide Web. Existing business intelligence tools suffer from a lack of analysis and visualization capabilities and traditional result list display by search engines often overwhelms business analysts with irrelevant information. Thus, developing tools that enable better(More)
To make good decisions, businesses try to gather good intelligence information. Yet managing and processing a large amount of unstructured information and data stand in the way of greater business knowledge. An effective business intelligence tool must be able to access quality information from a variety of sources in a variety of forms, and it must support(More)
Ever since the 9-11 incident, the multidisciplinary field of terrorism has experienced tremendous growth. As the domain has benefited greatly from recent advances in information technologies, more complex and challenging new issues have emerged from numerous counter-terrorism-related research communities as well as governments of all levels. In this paper,(More)