1 Luiz Paulo Maia, Federal University of Rio de Janeiro, NCE/UFRJ, PoBox 2.324, Rio de Janeiro, RJ, Brazil, 20001-970 [email protected] 2 Ageu C. Pacheco Jr., Federal University of Rio de Janeiro, NCE/UFRJ, PoBox 2.324, Rio de Janeiro, RJ, Brazil, 20001-970 [email protected] Abstract  A common problem faced by teachers and Computer Science students is the difficulty in attaining a proper unders...

Software engineering has understood for many years that rewriting the same software, over and over again, is expensive. Software reuse is not commonplace, however, and the research community has begun to address this problem. We seek an understanding of the factors which enable or inhibit reuse, and of the techniques and methods which succeed in supporting systematic reuse. By encouraging reuse...

Workflow Management Systems need to support organizations adapt their workflows to meet changing environments and business processes. We propose a traceability based knowledge management approach to support such a capability in WFMS. We present a framework for representing traceability knowledge to capture the context in which workflows are specified and evolved. We discuss the functionalities ...

Despite the attention that direction relations have attracted in domains such as Spatial Query Languages, Image and Multimedia Databases, Reasoning and Geographic Applications, they have not been extensively applied in spatial access methods. In this paper we define direction relations between two-dimensional objects in different levels of qualitative resolution and we show how these relations ...