Chess players' long-range planning or chess-strategic thinking is based on more or less poorly definable and intuitive notions such as weak-square, initiative, space advantage, etc. Since these concepts are fuzzy and thus close to everyday concepts, chess players' long-range planning provides a good environment to study apperception with poorly definable notions. The three experiments provided data indicating that problem subspace abstraction has both benefits and costs. Active representation blockades alternative representations unless subjects restructure. As a result, chess players often make serious cognitive errors by abstracting the wrong problem subspaces. Even in strategical positions, the problem subspaces generated are selfconsistent and bound by unconscious content-specific principles.

MareNet is a new online information service and presently one of the largest and most complete portals for marine science. We report here on the present status of MareNet and describe its concept as an example of services for distributed scientific information maintained by a distributed workforce.

ZusammenfassungDer Beitrag beschreibt zunächst den Ist-Zustand des Zusammenspiels der von der TIB betriebenen Virtuellen Fachbibliotheken sowie dem Fachportal GetInfo. Er gibt einen Ausblick auf ein neues übergreifendes Webportal der TIB, in welchem GetInfo aufgehen wird und welches künftige Fachinformationsdienste der TIB in Form von erweiterten Facheinstiegen anbieten wird – unter Einbindung neuartiger Dienste für Fachcommunities sowie Fachausschnitten der medienspezifischen Portale der TIB.

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