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The multi-layered schema of an extended entity-relationship model /
(1984)
In a database design process, the database model used is essential for producing a good conceptual schema. In some database models, like IMS and CODASYL, a conceptual schema contains too many implementation details which ...
A topological approach to database theory /
(1984)
The data modeling techniques which are currently used to construct the logical view of data have made use of trees, graphs, and sets, as underlying data structures. However, these structures have certain limitations when ...
A theoretical comparison of four parallel processing networks /
(1984)
Previous work on the analysis of execution time of parallel algorithms has either largely ignored communication delays or has dealt with specific interconnection structures such as the perfect shuffle and the nearest ...
Optical frequency domain reflectometry /
(1984)
The optical frequency domain technique has been used in the analysis of discrete and distributed reflections in an optical fiber. Reflections are studied in three different cases: Discrete reflections only, distributed ...