The duality of objects and relationships is so deeply embedded in our thinking that almost all
modelling languages include it as a fundamental distinction. Yet there is evidence that the …

The iterative procedure called'mean-shift'is a simple robust method for finding the position of
a local mode (local maximum) of a kernel-based estimate of a density function. A new robust …

From environmental management to land planning and geo-marketing, the number of
application domains that may greatly benefit from using data enriched with spatio-temporal …

Workflow Management Systems (WFMSs) facilitate the definition of structure and
decomposition of business processes and assists in management of coordinating …

Workflow technology has recently been employed not only within businesses but also as a
framework for implementing e-services over the Internet. Such e-services typically require …

Exception handling in workflow management systems (WFMSs) is a very important problem
since it is not possible to specify all possible outcomes and alternatives. Effective reuse of …

In an e-service environment, workflow involves not only a single organization but also a
number of business partners. Therefore, workflow inter-operability in such an environment is …

This paper presents a semantic foundation of temporal conceptual models used to design
temporal information systems. We consider a modelling language able to express both …

Next generation information system applications require powerful and intelligent information
management that necessitates an efficient interaction between database and knowledge …

Cartography is one of the major application areas using geographical databases. Whether it
is for the business of producing paper maps for sale, or whether it is for displaying maps on …