Browsing by Author "Sahle, Eskinder"
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- Development of a Modern OPAC: From REVTOLC to MARIANFox, Edward A.; France, Robert K.; Sahle, Eskinder; Daoud, Amjad M.; Cline, Ben E. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1993-02-01)In the Retrieval Experiment -- Virginia Tech OnLine Catalog (REVTOLC) study we carried out a large pilot test in 1987 and a larger, controlled investigation in 1990, with 216 users and roughly 500,000 MARC records. Results indicated that a forms-based interface coupled with vector and relevance feedback retrieval methods would be well received. Recent efforts developing the Multiple Access and Retrieval of Information with ANnotations (MARIAN) system have involved use of a specially developed object-oriented DBMS, construction of a client running under NeXTSTEP, programming of a distributed server with a thread assigned to each user session to increase concurrency on a small network of NeXTs, refinement of algorithms to use objects and stopping rules for greater efficiency, usability testing and iterative interface refinement.
- Development of a user interface for MARIAN and CODER systemsSahle, Eskinder (Virginia Tech, 1993)The objective of this project is to implement a Graphical User Interface (GUI) for information storage and retrieval (lS&R) that will be easy to use, easy to maintain and easy to extend. The user interface implementation took advantage of the advanced object oriented GUI development environment provided by NeXTstep to provide an iconic interface that allows direct manipulation and supports mixed initiative dialogues. The GUI will be used in conjunction with a family of IS&R systems at Virginia Tech: CODER (COmposite Document Expert/effective/extended and Retrieval), a test-bed that is being developed to experiment with various intelligent information retrieval techniques, and MARIAN (Multiple Access and Retrieval Information with ANnotation), an advanced on-line public access library catalog system providing network access to all facets of bibliographic information.