A view mechanism can help handle the complex semantics in emerging application areas such as image databases. This paper presents the view mechanism we de ned for the DISIMA image database system. Since DISIMA is being developed on top of an object-oriented database system, we rst propose a powerful object-oriented view mechanism based on the separation between types (interface functions) and c...

There currently are several views on human computer interaction in measuring interactive qualities: ( I ) the interaction-oriented view, (2) the user-oriented view, (3) the product-oricnted view and (4) the formal view. Two different possibilities of measurement within the product-oriented view are introduced in this paper. Different types of user interfaces can be described and differentiated ...

We discuss the design and implementation of the O 2 Views object-oriented database view mechanism, which allows the redeenition of both the structure and the behavior of objects stored in a database. The data model extended with views is rst given and then the functionalities of the prototype implementing it are presented. The paper focuses on the requirements for the implementation of an objec...

We discuss the design and implementation of the O2Views object-oriented database view mechanism, which allows the redeenition of both the structure and the behavior of objects stored in a database. The data model extended with views is given and the functionalities of the prototype implementing it are presented. The paper focuses on the requirements for the implementation of an object-oriented ...

In this paper, we present a new idea for robust project scheduling combined with a cost-oriented uncertainty investigation. The result of the new approach is a makespan minimal robust proactive schedule, which is immune against the uncertainties in the activity durations and which can be evaluated from a cost-oriented point of view on the set of the uncertain-but-bounded duration and cost param...

Data warehousing is an approach to data integration in which integrated information is stored in a data warehouse for direct querying and analysis. To provide fast access, a data warehouse stores materialized views defined over data from its data sources. As a result, a data warehouse needs to be maintained to keep its contents consistent with the contents of its data sources. Incremental maint...

Large and complex software systems contain a variety of entities (objects) and a complex control system (transformation function). The pure object-oriented design and structured design approaches concentrate on either objects or the transformation function separately. As such they may not be adequate in isolation, to deal with the design of complex systems. Therefore, it makes sense to study th...