Information Systems (TOIS)


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ACM Transactions on Information Systems (TOIS), Volume 14 Issue 1, Jan. 1996

A visual retrieval environment for hypermedia information systems
Dario Lucarella, Antonella Zanzi
Pages: 3-29
DOI: 10.1145/214174.214175
We present a graph-based object model that may be used as a uniform framework for direct manipulation of multimedia information. After an introduction motivating the need for abstraction and structuring mechanisms in hypermedia systems, we...

Sequential patterns in information systems development: an application of a social process model
Daniel Robey, Michael Newman
Pages: 30-63
DOI: 10.1145/214174.214178
We trace the process of developing and implementing a materials management system in one company over a 15-year period. Using a process research model developed by Newman and Robey, we identify 44 events in the process and define them as either...

Evaluation of model-based retrieval effectiveness with OCR text
Kazem Taghva, Julie Borsack, Allen Condit
Pages: 64-93
DOI: 10.1145/214174.214180
We give a comprehensive report on our experiments with retrieval from OCR-generated text using systems based on standard models of retrieval. More specifically, we show that average precision and recall is not affected by OCR errors across...

An extension of Ukkonen's enhanced dynamic programming ASM algorithm
Hal Berghel, David Roach
Pages: 94-106
DOI: 10.1145/214174.214183
We describe an improvement on Ukkonen's Enhanced Dynamic Programming (EHD) approximate string-matching algorithm for unit-penalty four-edit comparisons. The new algorithm has an asymptotic complexity similar to that of Ukkonen's but is...