Efficient resource retrieval is a crucial issue, particularly when semantic resource descriptions are considered which enable the exploitation of reasoning services during the retrieval process. In this context, resources are commonly retrieved by checking if each available resource description satisfies the given query. This approach becomes inefficient with the increase of available resources...

• Baseline retrieval • Flat text representation • Standard retrieval models (LM, BM25) • Fielded representation • Predicates holding title values are put in a separate field • Fielded variants of retrieval models (LMF, BM25F) • Entity importance • Weigh trusted, high-quality sources higher (DBpedia) • Extended preprocessing • Content extraction from URIs ...

As part of a Distributed Information Retrieval system a description of each remote information resource, archive or repository is usually stored centrally in order to facilitate resource selection. The acquisition of precise resource descriptions is therefore an important phase in Distributed Information Retrieval, as the quality of such representations will impact on selection accuracy, and ul...

Research work in the field of E-learning is represented by a broad area of applications ranged from web learning to virtual courses. Web-based courses offer obvious advantages for learners by making access to educational resource very fast and relevance, at any time or place. The objective of this paper is to create an ontology based domain specific representation for e-learning domain. This pa...

State of the art digital video compression produces bursty, variable bit rate video. The bursty nature of compressed video raises challenges in the design of video servers. In this paper, we first present a method for the efficient retrieval of bursty video data from the disk system to the memory of a digital video server. For a single video stream, the proposed retrieval schedule minimizes the...

IntroductIon Resource retrieval addresses the problem of finding best matches to a request among available resources, with both the request and the resources described with respect to a shared interpretation of the knowledge domain the resource belongs to. The problem of resource matching and retrieval arises in several scenarios, among them, personnel recruitment and job assignment, dating age...

It is useful to support Byzantine robustness in a Private Information Retrieval (PIR) protocol so that any database operators that are being used cannot maliciously affect the records that a client is looking for. We analyze the problem of Byzantine servers in Goldberg’s IT-PIR protocol and relate the problem to the well known stag hunt game. To make this game more applicable, we expand it to i...