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Terence R. Smith, Olga Agapova, Michael Freeston, Alex Ushakov

The Organization of Knowledge Spaces for a Virtual Learning Environment Supported by a Digital Library. Terence R. Smith, Olga Agapova, Michael Freeston, Alex Ushakov University of California, Santa Barbara, CA93106 USA

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Terence R. Smith, Olga Agapova, Michael Freeston, Alex Ushakov

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  1. The Organization of Knowledge Spaces for a Virtual Learning Environment Supported by a Digital Library Terence R. Smith, Olga Agapova, Michael Freeston, Alex Ushakov University of California, Santa Barbara, CA93106 USA smithtr@cs.ucsb.edu, olga@geog.ucsb.edu, freeston@alexandria.ucsb.edu, ushakov@alexandria.ucsb.edu

  2. Alexandria Digital Library (ADL) • Consortium of researchers, engineers, and educators; • Distributed and Heterogeneous; • A framework for building distributed digital libraries of georeferenced information; • Provider of a uniform interface to one or more collections; • Bucket framework - is the base of architecture; • Balance between simplicity of Web document delivery and and richness of Z39.50. • A new service is a a concept-based learning environment for the science education.

  3. Z39.50+MARC+ AACR2 SDLIP increasing functionality GDLIP HTTP+ HTML OAI SOAP increasing structure, standardization increasing generality INTEROPERABILITY LANDSCAPE ADEPT

  4. The approach of ADEPT to Concept-Based Learning • Scientific activity and learning are based on a large core of scientific concepts; • The syntactic and semantic information may be represented in terms of a strongly-structured model (SSM) of the concept; • A deeper understanding of any domain of science is promoted when learning environments are based explicitly on the use of SSMs to represent important sets of concepts and their interrelationships.

  5. Components and Associated Services of a Concept-Based Learning Environment

  6. Concept instance ingest Concept instance search and visualization Instructor’s preparation and presentation tool Concept model ingest Concept space visualization SQL/ ODBC ADEPT middleware Local and distributed ADL collections XML XML ADL middleware SRB ADN metadataDB Concept model DB Learning Module DB Local Learning Object Repository Distributed Learning Object Repository ADEPT Virtual Learning Environment Architecture Diagram

  7. A Three-Window Display of Concept-Based Learning Materials

  8. Abstract Model (SSM) of a Concept and Correlative Relationships

  9. Lecture Presentation The lecture is presented on three projection screens, showing the Lecture Plan window (center),the Concept window (left)and the Illustrations window (right).

  10. The Lecture Plan Window • The left-hand frame displays the structure of the lecture • The right-hand frame displays the content of the lecture • ADL icons (globe image) attached to a concept link to a display of concept properties in the concept window Other icons attached to a concept link to a display of concept examples in the illustration window

  11. The Concept Window The concept window displays the properties of concepts.

  12. The Illustrations Window The illustrations window displays examples of concepts

  13. Conclusions • A key issue in the development of ADEPT learning services based on SSMs of scientific concepts is an evaluation of the degree to which they deepen a student's understanding of both the conceptual basis of science and scientific knowledge in specific domains. • We are currently instrumenting the teaching of courses in order to develop such evaluations. • It will take time to assess the pedagogic value of using KBs of strongly-structured representation of scientific concepts, together with the associated collections and services, in learning environments. • Nevertheless, recent developments in both text publishing and in educational psychology indicate their potential value. • Evaluation (add more)

  14. Acknowledgments • The Alexandria Digital Library Project's research and development activities are supported by the National Science Foundation under awards IS IRI- 9411330, NSF-ATM-9732665, and NSF-DUE-0121578. • Operational activities are supported by the Map and Imagery Laboratory at the Davidson Library, University of California, Santa Barbara. • Additional support is or has been provided by: Alias|Wavefront; Digital Equipment; Informix; Microsoft; Oracle; Sun Microsystems; and the U.S. Geological Survey.

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