| 1. |
- Aryasetiawan, F., et al.
(författare)
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Energy loss spectra and plasmon dispersions in alkali metals : Negative plasmon dispersion in Cs
- 1994
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Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 73:12, s. 1679-1682
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Tidskriftsartikel (refereegranskat)abstract
- We present ab initio calculations of the energy loss spectra and plasmon dispersions of the alkali metals Na, K, Rb, and Cs within the random phase approximation, including band structure effects and core electrons as well as local field effects, due to inhomogeneity in the induced charge density. Band structure effects are found to cause a negative dispersion in Cs.
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| 2. |
- Berndtsson, Mikael
(författare)
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Management of Rules in Object-Oriented Databases
- 1994
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Ingår i: Proceedings of the Baltic Workshop on National Infrastructure Databases. ; , s. 78-85
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Konferensbidrag (refereegranskat)abstract
- This paper proposes a new approach to associating rules with events in object-oriented database systems. In it we propose a new run time mechanism, which associates rules with specific event definitions. This provide a basis for indexing rules by event definitions, which reduces rule checking to a minimum. The proposed subscription mechanism is general, in that it can be applied to both primitive events and composite events. Both rules and events are represented as first class objects. This architecture has been adopted in the ACOOD2 prototype on top of ONTOS.
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| 3. |
- Berndtsson, Mikael
(författare)
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Reactive Object-Oriented Databases and CIM
- 1994
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Ingår i: Database and Expert Systems Applications. - Berlin : Springer. - 9783540584353 - 0387584358 - 3540584358 ; , s. 769-778
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Konferensbidrag (refereegranskat)abstract
- This paper propose a simple and powerful approach to associating rules with events in reactive object-oriented database systems. In it we propose a new run time subscription mechanism, which associates rules with specific event definitions. This brings optimization considerations - when to fire a rule - to the language level. The proposed subscription mechanism reduces rule checking to a minimum. It can be applied to both primitive and composite events. Both rules and events are represented as first class objects. This architecture has been adopted in the ACOOD2 prototype on top of ONTOS.
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| 4. |
- Niklasson, Lars, et al.
(författare)
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Can Connectionist Models Exhibit Non-Classical Structure Sensitivity?
- 1994
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Several connectionist models have been supplying non-classical explanations to the challenge of explaining systematicity, i.e., structure sensitive processes, without merely being implementations of classical architectures. However, lately the challenge has been extended to include learning related issues. It has been claimed that when these issues are taken into account, only a restricted form of systematicity could be claimed by the connectionist models put forward so far. In this paper we investigate this issue further, and supply a model and results that satisfies even the revised challenge.
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