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Knowledge Sifter is a scaleable agent-based system that supports access to heterogeneous information sources such as the Web, open-source repositories, XML-databases and the emerging Semantic Web. User query specifi cation is supported by a user agent that accesses multiple ontologies using an integrated conceptual m o del. A c o llection of cooperating(More)
This paper addresses the role of case-based reasoning in semantic search, and in particular, as it applies to Knowledge Sifter, an agent-based ontology-driven search system based on Web services. The Knowledge Sifter architecture is extended to include a case-based methodology for collaborative semantic search, including case creation, indexing and(More)
Knowledge Sifter is a scaleable agent-based system that supports access to heterogeneous information sources such as the Web, open-source repositories, XML-databases and the emerging Semantic Web. User query specification is supported by a user agent that accesses multiple ontologies using an integrated conceptual model expressed in the Web Ontology(More)
This paper presents the requirements for just in time knowledge management (JIT-KM). In order to deliver high-value information to user for decision-making, one must understand the user's preferences, biases and decision context. A JIT-KM architecture is presented consisting of user, middleware and data services to search for information from heterogeneous(More)
This paper addresses the various facets of emergent semantics in content retrieval systems such as Knowledge Sifter, an architecture and system based on the use of specialized agents to coordinate the search for knowledge in heterogeneous sources, including the Web, semi-structured data, relational data and the Semantic Web. The goal is to provide(More)
Korean National Science & Technology Information Service (NTIS) provides a service of evaluating national R&D projects and providing such evaluated national R&D projects along with their participating researcher information. It also provides a service of recommending and selecting evaluation committees for the R&D projects. Transparency is an important(More)
This paper proposes to model and represent an object's digital persona by means of a conceptual model that uses fragments of schemata that are termed data-DNA. The object may be a person, place or thing of interest; it may be either physical or virtual; and it supports interactions between and among objects. The goal is to provide a framework in which to(More)
iii DEDICATION This dissertation is dedicated to my mother Ok-Hui So and my two siblings Kwang-Jo Jeong and Young-Ok Jeong. I would also like to dedicate this dissertation in the memory of my father Chan-Young Jeong. iv ACKNOWLEDGEMENTS I would like to express my profound thanks and appreciation to my advisor Dr. Larry Kerschberg for his patient, thorough,(More)
Semantic service search engine is designed for DE, to provide semantic search support. Digital ecosystem (DE) is comprised of heterogeneous and distributed species which can play the dual role of service provider and service requester. DE needs to provide a reliable and trustworthy link between service providers and service requesters. So, semantic service(More)
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