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This volume comprises the proceedings of the Eleventh International Conference on the Entity-Relationship Approach held in Karlsruhe, Germany, October 7-9, 1992. It contains the full versions of all the 22 accepted papers selected from in total 64 submissions; in addition, the two invited talks by Scheer and by Tsichritzis and others are represented asfull papers and the two other invited speakers...
Whenever software is installed on a computer system, one has to agree to the end-user license agreement. The software license agreement grants licensee certain rights in software usage, but usually the ownership rights of the software stays with licensor. The licensor may also hold the right to restrict the usage of the software and can revoke the agreement if the licensee violates the license terms...
Sharing data within grid environments always results in losing control over data usage. If the shared information is medical data, this violates laws as specified in HIPAA, because access to such data must be reconstructible and needs to be tightly controlled. To comply with these regulations it must be guaranteed, that each data access and modification is recorded to produce audit trails. The provided...
Doing business electronically is a major tendency among customers and businesses but there is always a threat about personal information privacy. E-mail address is one thing about which customers expect that e-businesses will not misuse it. Most e-businesses have privacy policy but that usually changes with time. And in case of violating privacy it is difficult to find the original source of violation...
Cloud computing allows delivering information technology power on demand. Be it either the hosting of a certain Web application or the outsourcing of an entire server or data center by means of virtualization. Applying these techniques however goes along with handing over the ultimate control of data to a third party. This paper investigates the application of Nimbus as a cloud resource and shows...
Bayesian networks are indispensable for determining the probability of events which are influenced by various components. Bayesian probabilities encode degrees of belief about certain events and a dynamic knowledge body is used to strengthen, update, or weaken these assumptions. The creation of Bayesian networks requires at least three challenging tasks: (i) the determination of relevant influence...
Within the Austrian Grid project phase 2, three different groups, each allocated to a different work package, join their efforts to implement a grid infrastructure for the european research project "Breath Gas Analysis for molecular oriented diseases''. This position paper provides background on the task and the resulting requirements, a presentation on solutions developed during related projects...
The quality evaluation of open source software (OSS) products, e.g., defect estimation and prediction approaches of individual releases, gains importance with increasing OSS adoption in industry applications. Most empirical studies on the accuracy of defect prediction and software maintenance focus on product metrics as predictors that are available only when the product is finished. Only few prediction...
Due to the immense volumes of medical data, the architecture of the future healthcare decision support systems focus more on interoperability than on integration. With the raising need for the creation of unified knowledge base, the federated approach to distributed data warehouses (DWH) is getting increasing attention. In this paper, we explore the idea of a federation technology and its uses within...
The key step of data warehouse integration is the construction of mappings that link mutually compatible components of data warehouse schemas: dimensions, aggregation levels, attributes and facts. In order to perform the integration process in a semi-automated manner, we must define similarity functions that compare the names and substructures of those structure elements. During the last decade, many...
Since the introduction of the semantic Web idea, many tools have been developed to harvest the advantage of machine-understandable data. Ontology and metadata are the two basic enabling requirements therefore. SemanticLIFE is a personal information management system which deals with data and metadata originating from various sources. Being developed on the basis of semantic Web technology standards,...
Database management systems providing powerful data management services have been developed in the recent decades to a great extent. All these systems are based on its own single data model, whereas the demand for managing multiple data sources with different data models is rapidly expanding. Therefore the need for intelligent management systems providing access to those heterogeneous and often distributed...
Multi agent systems, grid technology, semantic Web, and Web intelligence paradigm are three modern approaches in information technologies, which we put together in our research effort described to create a new-generation infrastructure called the wisdom grid with the mission to maintain, share, discover, and expand knowledge in geographically distributed environments, and in this way to support development...
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