This paper has a twofold concern. First, to show that probabilitypropagation nets (PPNs) can be derived from formulae for conditionalprobabilities. Second, to show that PPNs are usable for (local)propagations of mass distributions, too, if the inscriptions are suitablyadapted.[...]

Knowledge compilation is a common technique for propositionallogic knowledge bases. A given knowledge base is transformedinto a normal form, for which queries can be answered efficiently. Thisprecompilation step is expensive, but it only has to be performed once.We apply this technique to...

In vielen Köpfen – sowohl bei Erwachsenen wie auch bei Schülern – geistert der Glaube, dassInformatik die Wissenschaft der „Computerlehre“ ist. Schon der berühmte Satz „In derInformatik geht es genauso wenig um Computer wie in der Astronomie um Teleskope“, derdem Informatiker...

In dieser Arbeit wird ein Datenmodell für Shared Annotationsvorgestellt. Basierend auf einem bereits existierenden Datenmodell fürAnnotationen, wird dieses erweitert um die Möglichkeit der Modellierung vonShared Annotations. Daraufhin werden Funktionen von Shared Annotationserläutert, die...

Ontologies play an important role in knowledge representationfor sharing information and collaboratively developing knowledgebases. They are changed, adapted and reused in different applicationsand domains resulting in multiple versions of an ontology. The comparisonof different versions and the...

With the Multimedia Metadata Ontology (M3O), we havedeveloped a sophisticated model for representing among others the annotation,decomposition, and provenance of multimedia metadata. Thegoal of the M3O is to integrate the existing metadata standards andmetadata formats rather than replacing...