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Tufts, Robert
Air Force Data Services Center
Washington, Washington DC
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1 - 10 of 37
reviews
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Iterators, schedulers, and distributed-memory parallelism
Graefe G. Software--Practice & Experience 26(4): 427-452, 1996. Type: Article
A major problem in parallel processing of relational queries has been the synchronization of resources for query evaluation. Normally, the query plan for executing a relational query is activated bottom-up. The author has demonstrated ...
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May 1 1997 |
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Space optimization in deductive databases
Srivastava D., Sudarshan S., Ramakrishnan R., Naughton J. ACM Transactions on Database Systems 20(4): 472-516, 1995. Type: Article
Space optimization can often be critical for string matching situations that use deductive databases. Examples include comparisons of DNA strings, change detection between digital images, and sequence querying in stock market applicati...
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Nov 1 1996 |
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Building a thesaurus for a collection of cartoon drawings
Bovey J. Journal of Information Science 21(2): 115-122, 1995. Type: Article
One of the important parts of an online information retrieval system is the construction of the thesaurus of subject keyword identifiers and their assignment to the items in the collection being indexed. If the items are textual docume...
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Nov 1 1996 |
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An extension of Ukkonen’s enhanced dynamic programming ASM algorithm
Berghel H., Roach D. ACM Transactions on Information Systems 14(1): 94-106, 1996. Type: Article
Approximate string matching (ASM) is used by word processing software to detect and correct misspelled words in documents. The technology is fairly mature, having been implemented in one form or another in almost every word processing ...
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Sep 1 1996 |
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The transition of legacy systems to a distributed architecture
Ganti N., Brayman W., Wiley-QED Publishing, Somerset, NJ, 1995. Type: Book (9780471060802)
One of the hottest topics in information technology is the definition of, and transition to, distributed information systems. For decades, centralized computer systems, with their master databases and online terminals arranged in star ...
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Feb 1 1996 |
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Constraint checking with partial information
Gupta A., Sagiv Y., Ullman J., Widom J. Principles of database systems (Proceedings of the thirteenth ACM SIGACT-SIGMOD-SIGART symposium, Minneapolis, Minnesota, United States, May 24-27, 1994) 45-55, 1994. Type: Proceedings
Constraint checking is one of many techniques used to ensure data integrity in distributed databases. It involves testing a potential update to ensure the resultant changes do not violate data consistency rules. An example might be tes...
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Oct 1 1995 |
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Polyrepresentation of information needs and semantic entities
Ingwersen P. Research and development in information retrieval (, Dublin, Ireland, 1101994. Type: Proceedings
Ingwersen outlines how the application of cognitive theory can provide a more robust information retrieval (IR) system for the user. He explains that this could be accomplished by using the concept of polyrepresentation of information ...
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Oct 1 1995 |
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Altruistic locking
Salem K., García-Molina H., Shands J. ACM Transactions on Database Systems 19(1): 117-165, 1994. Type: Article
Long-lived transactions (LLTs) have historically caused processing problems for large, transaction-driven database systems. Such transactions tend to lock a large number of database objects for a long period of time, causing delays in ...
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Apr 1 1995 |
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The Hybrid Object-Relational Architecture (HORA)
Sutherland J., Pope M., Rugg K. Applied computing (, Indianapolis, IN, Feb 14-16, 1993) 3331993. Type: Proceedings
One of the problems facing organizations today is how to tie new object-oriented applications to existing relational databases. Realistically, only two approaches to this problem exist. First, the object applications can be written wit...
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Nov 1 1994 |
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Stochastic query optimization in distributed databases
Drenick P., Smith E. ACM Transactions on Database Systems 18(2): 262-288, 1993. Type: Article
One of the major problems with distributed database systems has been the formulation of realistic query optimization strategies when multiple queries are being processed. Solving this problem for distributed relational databases is esp...
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Jul 1 1994 |
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