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AIC Seminar Series

Active: A Unified Framework for Activity Recognition and Execution

Didier GuzzoniEcole Polytechnique Federale Lausanne

Date:  Wednesday, September 8th 2004 at 4:00pm

Location:  EJ228  (Directions)


The goal of our research is to provide a unified, visual, standards-based framework for developing intelligent systems incorporating numerous AI techniques. As an implementation of such framework, our solution (Active) provides a unified platform for both activity recognition and execution. Active is based on the concept of active ontologies. In our context ontologies are not considered as passive data structures, but rather as execution environments. An active ontology is a processing formalism where distinct processing elements are arranged according to ontology notions. The execution of processing elements is triggered by conditional expressions based on events (data) and time constraints. Within Active facts are represented as first order logic predicates enhanced with functional information such as time stamp, lifespan, relevance or ownership. Using such facts, processing elements (concepts) can exchange information and store local data in private or shared contexts. Active is evaluated by creating a "library of templates" to model AI systems. Templates will be created to provide natural language processing (activity recognition), multimodal fusion, dynamic presentation (using reactive planning) and plan execution.

   Bio for Didier Guzzoni

Didier Guzzoni is a PhD student at the Swiss Federal Institute of Technology in Lausanne (EPFL). His research focus is on web service dynamic selection and execution. He received a master degree in software engineering from the Swiss FederFederal Institute of Technology in 1996. He is a senior consultant with Oblix, a company providing web service management solutions. Before that, he worked as a research engineer at VerticalNet, where he was involved in the OSM project, an infrasctructure for web services facilitation and orchestration. He started his career as a research engineer at SRI International working on the OAA platform, mobile robotics projects and the CHIC! lab (Computer Human Interface Center).

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