Views are an important functionality provided by the relational database systems. However, commercial object-oriented database systems do not support a view mechanism because defining the semantics of views in the context of an object-oriented model is more difficult than in the relational model. Indeed, views are not included in the ODMG standard. In this paper, we present a proposal aimed at ...

In this paper we present a new approach for interactive view-dependent rendering of large polygonal datasets, which relies on advanced features of modern graphics hardware. Our preprocessing algorithm starts by generating a simplified representation of the input mesh. It then builds a multiresolution hierarchy for the simplified model. For each face in the hierarchy, it generates and assigns a ...

The network of excellence HUMAINE is currently making a co-ordinated, interdisciplinary effort to develop a consistent view on emotion-oriented computing. This overview paper proposes a “map” of the research area, distinguishing core technologies from applicationoriented and psychologically oriented work. First results from the ongoing research in the thematic workpackages are reported.

Schema updates on shared object-oriented databases (OODBs) are almost always prohibited because of the risk of making existing application programs obsolete when run against the modiied schema. We have proposed a solution approach, called Transparent Schema Evolution (TSE), that successfully addresses this problem by integrating schema evolution capabilities with object-oriented view facilities...

Driven by the ever-growing demand for computing power, computers are becoming more and more powerful. However, in recent years, due to the physical limitations, this increased computing power does not come in the form of increased CPU clock speed, but in the form of more cores(processors) in a single chip die. Computer industry has started to use this new multi-core technology to massively prod...

The per-method access control lists of standard middleware technologies allow only simple forms of access control to be expressed and enforced. Given the increasing use of webbased applications involving sensitive data, the increased threat and the stringent requirements of privacy laws, a more flexible and secure approach is needed. In this paper we present a three-step approach to access cont...

In some database applications it is natural to deene individual attributes of a relation as derived attributes, separately from the deenition of other attributes. This approach minimizes the complexity of the schema. We propose a formalism in which rules are divided into two classes: \Deening rules" specify the existence of tuples in the relation, together with some of their attributes. \Reenin...

Finite failure of computations plays an important role as programming construct in the logic programming paradigm, and it has been shown that this also extends to the case of the functional logic programming paradigm. In particular we have considered CRWLF, a previous proof-theoretic semantic framework able to deduce negative (failure) information from functional logic programs. The non-determi...

Functionalities that are offered in form of interactive websites are omnipresent. It requires a substantial manual and tedious effort to use the functionalities within increasingly sophisticated use cases. Structured descriptions enable the development of methods that support users in dealing with everyday tasks. We present how a process-oriented view of the Web is gained and helps end users, f...

Considering the immense variety of test tools available, both commercial and open source, an extensive evaluation of these tools with respect to their adequacy for a given organizational or project context seems to be impossible. On this account we present a systematic approach for deriving easily verifiable evaluation criteria for test tools. We define both, quality criteria and functional cri...