Access control is the process by which authorized users are granted permission over resources. Access control models incorporate application requirements in their design and thus evolve with the applications. The rise of online social networks (OSN), like Facebook, has posed new requirements over the privacy of users’ data due to the presence of heterogeneous privacy circle. The traditional mod...

Social networking sites (SNS) have become a significant component of people’s daily lives and have revolutionized the ways that business is conducted, from product development and marketing to operation and human resource management. However, there have been few systematic studies that ask why people use such systems. To try to determine why, we proposed a model based on uses and gratifications...

When it comes to the development of new products, the product management has to encourage collaboration throughout all shareholders. The higher the number of shareholders, the higher the challenges towards cost, development time, delay, quality, and communication. This task has become even more difficult since social networks and online communities have gained popularity as a customer-driven in...

Nowadays, online social networks are considered as one of the most important emerging phenomena of human societies. In these networks, prediction of link by relying on the knowledge existing of the interaction between network actors provides an estimation of the probability of creation of a new relationship in future. A wide range of applications can be found for link prediction such as electro...

The paper considers the importance of knowledge management in the new economy, and focuses on the concept of knowledge audit and its need for developing and monitoring the knowledge management implementation. A special focus is made on knowledge audit concept and the approaches and processes proposed and used in practice. The paper highlights also some tools utilized in knowledge audit and the ...

An important and rapidly developing area of database application is that of Criminal Intelligence Analysis and similar investigatory work. Criminal Intelligence Analysis is not well supported by existing database technology. The area is characterised by small specialist software houses that develop their products pragmatically by responding to the needs of their user communities. This work coul...