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Supercomputer Algorithms for Reactivity, Dynamics and Kinetics of Small Molecules

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Proceedings of the NATO Advanced Research Workshop, Colombella di Perugia, Italy, August 30-September 3, 1988


Titel: Supercomputer Algorithms for Reactivity, Dynamics and Kinetics of Small Molecules
Autoren/Herausgeber: Antonio Laganà (Hrsg.)
Aus der Reihe: NATO Science Series C
Ausgabe: 1989

ISBN/EAN: 9780792302261

Seitenzahl: 452
Format: 0 x 0 cm
Produktform: Hardcover/Gebunden
Gewicht: 950 g
Sprache: Englisch

The need for accurate computational procedures to evaluate detailed properties of gas phase chemical reactions is evident when one considers the wealth of information provided by laser, molecular beam and fast How experiments. By stressing ordinary scalar computers to their limiting performance quantum chemistry codes can already provide sufficiently accurate estimates of the stability of several small molecules and of the reactivity of a few elementary processes. However, the accurate characterization of a reactive process, even for small systems, is so demanding in terms of computer resources to make the use of supercomputers having vector and parallel features unavoidable. Sometimes to take full advantage from these features all is needed is a restructure of those parts of the computer code which perform vector and matrix manipulations and a parallel execution of its independent tasks. More often, a deeper restructure has to be carried out. This may involve the problem of choosing a suitable computational strategy or the more radical alternative of changing the theoretical treatment. There are cases, in fact, where theoretical approaches found to be inefficient on a scalar computer exhibit their full computational strength on a supercomputer.

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