One of the main problems of collaborative filtering recommenders is the sparsity of the ratings in the users-items matrix, and its negative effect on the prediction accuracy. This ...
: Collaborative learning environments require carefully crafted designs –both technical and social. This paper presents a model describing how to design socio-technical environme...
As a result of the anthrax letter incidents in 2001, concerns about terrorists’ use of biological agents have increased dramatically at government state and federal levels. The ...
Lisa Patvivatsiri, Elliot J. Montes Jr., Ouyang Xi
In this paper, we describe a novel approach to policy-based intrusion detection. The model we propose checks legality of information flows between objects in the system, according...