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Articles you may be interested inThe stationary non-Poissonian collision model of energy relaxation and stochastic motion in condensed phase processes Two stochastic dynamic models are used to study several aspects of curve crossing phenomena in dissipative systems. A surface hopping model is used to test the qualitative predictions of earlier theories. The simulation results agree well with the qualitative picture. Results are obtained for an alternate semiclassical model based on a vector spin representation which is derived via a variational principle. The vector model shows some differences in behavior as compared to the hopping model. In certain regimes the vector model shows chaotic behavior.[ 1TA2]where A is twice the electronic coupling matrix element, F) 3836

The need for cyber security professionals continues to grow and education systems are responding in a variety of way. The US government has weighed in with two efforts; the NICE effort led by NIST and the CAE effort jointly led by NSA and DHS. Industry has unfilled needs and the CAE program is changing to meet both NICE and industry needs. This paper analyzes these efforts and examines several critical, yet unaddressed issues facing school programs as they adapt to new criteria and guidelines. Technical issues are easy to enumerate, yet it is the programmatic and student success factors that will define successful programs.

A numerical path integral technique based upon a quasiclassical Langevin equation is presented for the calculation of quantum mechanical properties of a system coupled to a dissipative bath. Fully quantum mechanical results are obtained by decorating quasiclassical paths with quantum fluctuations. The use of diophantine integration has been compared to Monte Carlo sampling of the fluctuation variables. Results are presented for several model systems.

Articles you may be interested inStructural and vibrational spectroscopy investigation of the 5-[(diphenyl) amino] isophthalic acid molecule AIP Conf.The AM1 hypersurface of peptides: Ramachandran maps of unusual amino acids AIP Conf.Picosecond Coherent Raman Scattering (ps CARS) is used to study vibrational dynamics in low temperature hydrogen bonded crystals including various amino acids and peptides. At low temperature this technique can be used to determine the vibrational lifetime T) when the ps CARS decay is exponential, and a lower limit to T) when it is not. Vibron (11 = 150-1600cm-)) lifetimes are less than 1 0 ps, whereas librons (11 = 30-120 cm -)), which are torsional oscillations of the amino acid or peptide chains, have long lifetimes (10 ps < T) < 5 ns). The theory of anharmonic processes is used to calculate the frequency dependence of TI for low temperature librons. Most crystals show TI