By Peter Kacsuk (auth.), Geraint A. Wiggins MA, PhD, Chris Mellish MA, PhD, Tim Duncan BA, MSc (eds.)

ISBN-10: 1447135466

ISBN-13: 9781447135463

ISBN-10: 3540197346

ISBN-13: 9783540197348

Since its perception approximately twenty years in the past, good judgment Programming - the belief of utilizing good judgment as a programming language - has been constructed to the purpose the place it now performs a massive function in components akin to database thought, man made intelligence and software program engineering. notwithstanding, there are nonetheless many difficult examine concerns to be addressed and the united kingdom department of the organization for common sense Programming used to be arrange to supply a discussion board the place the flourishing examine group may perhaps speak about very important problems with common sense Programming which have been frequently by-passed on the huge foreign meetings. This quantity comprises the twelve papers that have been offered on the ALPUK's third convention which was once held in Edinburgh, 10-12 April 1991. the purpose of the convention used to be to provide a huge yet exact technical perception into the paintings at the moment being performed during this box, either within the united kingdom and by way of researchers as a long way afield as Canada and Bulgaria. The breadth of curiosity during this quarter of computing device technological know-how is mirrored within the variety of the papers which hide - among different components - hugely parallel implementation, constraint good judgment programming, circuit modelling, algebraic evidence of software homes, deductive databases, specialized editors and standardisation. The ensuing quantity offers a great evaluate of the present development being made within the box and may be of curiosity to researchers and scholars of any elements of good judgment programming, parallel computing or database suggestions and management.

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Extra resources for ALPUK 91: Proceedings of the 3rd UK Annual Conference on Logic Programming, Edinburgh, 10–12 April 1991

Sample text

It ought to be possible to indicate that two computations, although running as co-routines, should always run on the same processor, that is neither should be ofHoaded. Clearly there is no point in running computations on separate processors if they co-routine but never actually execute simultaneously - we will just lose out because of time delay on interprocessor communication. An alternative approach to our use of annotations to control scheduling and computation to processor mapping is the use of a meta-language.

In the worst case the unneeded computation is non-terminating, and if for some reason it is given priority over the other computations the whole computation will never terminate. So if A, Band C were constrained to run on one processor, we would prefer that priority were given to A. If only two processors were available, we would 25 have a more difficult situation. If we believe it is more likely that A will evaluate to true, we would prefer to use the one spare processor to evaluate B, similarly we would prefer to give priority to C if A is likely to evaluate to false.

2: An overview of the Net-Clause Language Syntactically the Net-Clause language (NCL) is an extension of the standard Prolog. Its semantics however is aimed at modeling graph like structures (networks), consisting of nodes and links. The nodes specify procedures unifying terms, and the links are channels along which the terms are propagated. The language is designed for describing distributed computation schemes, without centralised control using unification as a basic data processing mechanism.

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ALPUK 91: Proceedings of the 3rd UK Annual Conference on Logic Programming, Edinburgh, 10–12 April 1991 by Peter Kacsuk (auth.), Geraint A. Wiggins MA, PhD, Chris Mellish MA, PhD, Tim Duncan BA, MSc (eds.)

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