Ronny Siebes

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This paper describes the design and implementation of Bibster, a Peer-to-Peer system for exchanging bibliographic data among researchers. Bibster exploits ontologies in data-storage, query formulation, query-routing and answer presentation: When bibliographic entries are made available for use in Bibster, they are structured and classified according to two(More)
Many Semantic Web problems are difficult to solve through common divide-and-conquer strategies, since they are hard to partition. We present Marvin, a parallel and distributed platform for processing large amounts of RDF data, on a network of loosely-coupled peers. We present our divide-conquer-swap strategy and show that this model converges towards(More)
Peer-to-Peer systems are a new paradigm for information sharing and some systems have successfully been deployed. It has been argued that current Peer-to-Peer systems suffer from the lack of semantics. The SWAP project (Semantic Web and Peer-to-Peer) aims at overcoming this problem by combining the Peer-to-Peer paradigm with Semantic Web technologies. In(More)
Peer-to-Peer systems have proven to be an effective way of sharing data. Modern protocols are able to efficiently route a message to a given peer. However, determining the destination peer in the first place is not always trivial. We propose a model in which peers advertise their expertise in the Peer-to-Peer network. The knowledge about the expertise of(More)
The information that is made available through the semantic web will be accessed through complex programs (web-services, sensors, etc.) that may interact in sophisticated ways. Composition guided simply by the specifications of programs’ inputs and outputs is insufficient to obtain reliable aggregate performance hence the recognised need for process models(More)
[BBT02] suggest a distributed approach to Knowledge Management which better fits the true situation in organizations and the processes people are used to. From a technological point of view peer-to-peer (P2P) solutions are particularly well suited, because they make it possible for different participants (organizations, individuals, or departments) to(More)
Web Science requires efficient techniques for analysing large datasets. Many Semantic Web problems are difficult to solve through common divide-and-conquer strategies, since they are hard to partition. We present MARVIN, a parallel and distributed platform for processing large amounts of RDF data, on a network of loosely-coupled peers. We present our(More)
The main objective of the MultimediaN E-Culture project is to demonstrate how novel semantic-web and presentation technologies can be deployed to provide better indexing and search support within large virtual collections of culturalheritage resources. The architecture is fully based on open web standards, in particular XML, SVG, RDF/OWL and SPARQL. One(More)
Peer-to-Peer systems have proven to be an effective way of sharing data. Modern protocols are able to efficiently route a message to a given peer. However, determining the destination peer in the first place is not always trivial. We propose a model in which peers advertise their expertise in the Peer-to-Peer network. The knowledge about the expertise of(More)