In distributed systems users often need to share sensitive data with other usersbased on the latter's ability to satisfy various policies. In many cases the data ownermay not even know the identities of the data recipients, but deems it crucial that theyare legitimate; i.e., satisfy the policy....

Development and progress mainly depends on education and its solid dissemination. Technologies as well as engineering solutions are important for the business and corporate houses. In this context, educational initiatives and programs play a vital role. Developing countries are suffering from...

Social and institutional demands, in addition to the increased socioeconomic development of territories, advocate the creation of a more current, more integrated and larger university which, while continuing to teach technical knowledge, also teaches values. This would enable the university to...

Understanding the relationship between technology and economics is fundamental to making judicious policy and design decisions. Many technologies that are successful in meeting their technical goals often fail to get adopted due to economic factors. This holds true even for networked systems,...

Audit mechanisms are essential for privacy protection in permissive access control regimes, such as in hospitals where denying legitimate access requests can adversely affect patient care. Recognizing this need, we develop a principled approach to audits. Our first contribution is a...

This thesis addresses the analysis and optimization of preemption in multi-class loss networks. Preemption, admission control and rate adaptation, are control mechanisms that enable loss network operators to provide quality of service (QoS) guarantees for admitted calls. This research includes...

A recent study found that supply-chain problems cost companies between 9 and 20 percent of their value over a six-month period (T.J. Becker, 2000). The problems range from part shortages to poorly utilized plant capacity. When you place this in the context of the overall business-to-business...

Bislang kann von einer Geschichte der Informatik noch keine Rede sein, sondernbesten-falls von Geschichten der Informatik. Der Plural verweist dabei zumeinem auf die vielfach nur in Form von Geschichtserzählungen beteiligterPioniere bestehenden Darstellungen. Zum anderen ist er Ausdruck der...