Titlebook: SOFSEM 2004: Theory and Practice of Computer Science; 30th Conference on C Peter Emde Boas,Jaroslav Pokorný,Július Štuller Conference proce

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Some Notes on the Complexity of Protein Similarity Search under mRNA Structure Constraints decision version of this problem is known to be NP-complete (see [2]), we prove here the APX-hardness of the general as well as of a restricted version of the problem. Moreover, we attack the problem by proposing a 4-approximation algorithm.

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Flexibility through Multiagent Systems: Solution or Illusion?exibility of the multiagent system could become uncontrollable. After examining various transactional approaches that all pose major challenges the paper concludes that to go beyond an illusion still requires intensive research.

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Querying and Viewing the Semantic Web: An RDF-Based Perspectiveutes nowadays the core language for creating and exchanging resource descriptions worldwide. Although large volumes of RDF descriptions are already appearing, sufficiently expressive declarative query languages for RDF and full-fledged view definition languages are still missing.

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Knowledge Acquisition and Processing: New Methods for Neuro-Fuzzy Systemsoned. Finally, the perception-based approach, which refers to computing with words and perceptions, is briefly outlined. Within this framework, a multi-stage classification algorithm and a multi-expert classifier are proposed.

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