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AM-1030
AM1, AM-1, or ''variation'', may refer to: AM1 may refer to: * Austin Model 1, a model used in quantum physics * BMW AM1, a version of the 1932 BMW 3/20 car * British Rail Class AM1, a class of electric multiple unit train * Socket AM1, a CPU socket from AMD for APUs with an integrated chipset * Air_mass_(solar_energy)#AM1, Air mass 1 solar energy spectra through one atmosphere thickness AM-1 may refer to: * EOS AM-1, a multi-national NASA scientific research satellite in a Sun-synchronous orbit around the Earth * Ekspress AM-1, a Russian Ekspress (satellite), Ekspress satellite launched on 30 October 2004 * Sega AM-1, a computer software development studio * USS Lapwing (AM-1), a 1918 U.S. Navy minesweeper * AM-1, a designation of the 1946 AM Mauler aircraft * Arp-Madore 1, a star-cluster * АМ-1, "Obninsk Nuclear Power Plant, Атом Мирный", the first civilian nuclear power reactor in the world. See also * AM (other) {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austin Model 1
Austin Model 1, or AM1, is a semi-empirical method for the quantum calculation of molecular electronic structure in computational chemistry. It is based on the Neglect of Differential Diatomic Overlap integral approximation. Specifically, it is a generalization of the modified neglect of differential diatomic overlap approximation. Related methods are PM3 and the older MINDO. AM1 was developed by Michael Dewar and co-workers and published in 1985. AM1 is an attempt to improve the MNDO model by reducing the repulsion of atoms at close separation distances. The atomic core-atomic core terms in the MNDO equations were modified through the addition of off-center attractive and repulsive Gaussian functions. The complexity of the parameterization problem increased in AM1 as the number of parameters per atom increased from 7 in MNDO to 13-16 per atom in AM1. The results of AM1 calculations are sometimes used as the starting points for parameterizations of forcefields in molec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |