Isotopomer Fractionation in the UV Photolysis of N_2O: 3. 3D Ab Initio Surfaces and Anharmonic Effects

The wavelength-dependent isotopic fractionation of N_2O is calculated, extending our previous work, Parts 1 and 2, in several aspects: (1) the fully three-dimensional ab initio electronic potential and transition dipole moment surfaces of S. Nanbu and M. S. Johnson (J. Chem. Phys. A 2004, 108, 8905) are used to calculate the absorption cross sections, instead of a 2D surface and (2) the vibrational frequencies and wave functions with anharmonicity correction are used for the ground electronic state. The results for the absorption spectrum and for the isotopic fractionation of the different isotopomers are discussed. One difference between experiments measuring the absorption coefficient (von Hessberg et al. Atmos. Chem. Phys. 2004, 4, 1237) and the others that measure instead the photodissociation is also discussed. Experiments on the quantum yield for wavelengths longer than 200 nm (>50000 cm^(−1)) would be helpful in treating the observed difference

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Thesis (Ph. D. in Medical Sciences)--University of Tsukuba, (A), no. 2391, 2000.3.24Joint authors: Takeshi Sakurai ... [et al.]Offprint. Originally published: Brain Research, v. 827, pp. 243-260, 1999Includes supplementary treaticesIncludes bibliographical reference

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1.分極連続体モデルの一つであるSCI-PCM モデルの計算について 2.ECP 基底を使用した場合、分極連続体モデル（IPCM やSCI-PCM）について 3.分極連続体モデルの一つであるIPCM モデルにおける繰り返し回数の制限について 4.Gaussian03のRevisionD.01のリリースについて 5.Gaussian03のRevisionC.03を用いた高性能演算サーバーの性能比較について 6.timexコマンドの利用法について 7.その

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1.分子科学計算推進室の設置経緯と役割について 2.三ヶ月間の活動報告 3.謝

A Study on the Historical Change and Current Situation of Professor Emeritus System in Japan

This article analyzes the historical change and current situation of the professor emeritus system in Japan. A professor emeritus system cannot be one of the core sub-systems which plays an important role in university, but assumed that any sub-system in university, including the professor emeritus system, undergoes influence of changes in the external condition. Historically, the professor emeritus system was introduced for the first time in the Imperial University in 1893. It was emphasized that Japanese universities needed it because there were professor emeritus systems in foreign countries. The system has been introduced in the specialized schools administered by the Ministry of Education in 1910’s and in national and public universities in the 1920’s. It was expanded to some schools in the non-educational section after the 1930’s. From the beginning of its introduction to the end of 1940’s, the title professor emeritus had the status of a “part-time government officer”. By 1950 all national, public, and private universities had introduced the professor emeritus system on the basis of the School Education Law. Since then the title professor emeritus has been regarded as a just title, and every university has had regulations on it, including the condition and process of conferring the title. As a result of analyzing current regulations on the professor emeritus system in national universities, it is clear that each university has original rules. For example, only five years of work experience as professor in that university is needed in some universities, and in some others twenty years work experience as professor, associate professor, as well as lecturer is needed

ISR spectra simulations with electron-ion Coulomb collisions

Incoherent scatter radars (ISR) rely on Thomson scattering of very high frequency or ultrahigh frequency radio waves off electrons in the ionosphere and measure the backscattered power spectra in order to estimate altitude profiles of plasma density, electron temperature, ion temperature, and ion drift speed. These spectra result from the collective behavior of coupled ion and electron dynamics, and, for most cases, existing theories predict these well. However, when the radar points nearly perpendicular to the Earth's magnetic field, the motion of the plasma across the field lines becomes complex and Coulomb collisions between electrons and ions become important in interpreting ISR measurements. This paper presents the first fully kinetic, self‐consistent, particle‐in‐cell simulations of ISR spectra with electron‐ion Coulomb collisions. We implement a grid‐based Coulomb collision algorithm in the Electrostatic Parallel Particle‐in‐Cell simulator and obtain ISR spectra from simulations both with and without collisions. For radar directions greater than 5° away from perpendicular to the magnetic field, both sets of simulations match collisionless ISR theory well. For angles between 3° and 5°, the collisional simulation is well described by a simplified Brownian motion collision process. At angles less than 3° away from perpendicular the Brownian motion model fails, and the collisional simulation qualitatively agrees with previous single particle simulations. For radar directions exactly perpendicular to the magnetic field the simulated collisional spectra match those from the Brownian motion collision theory, in agreement with previous single particle simulations.This work was supported by NASA grants NNX14AI13G and NNX16AB80G and NSF grant PHY-1500439. This work used the XSEDE and TACC computational facilities, supported by NSF grant ACI-1053575. The work by Alex Fletcher was supported by NSF-AGS Postdoctoral Research Fellowship award 1433536 while at the Center for Space Physics, Boston University. Simulation produced data are archived at TACC and are available upon request. We thank John Swoboda of MIT Haystack Observatory for his suggestions on processing the simulated ISR spectra. (NNX14AI13G - NASA; NNX16AB80G - NASA; PHY-1500439 - NSF; ACI-1053575 - NSF; 1433536 - NSF-AGS Postdoctoral Research Fellowship at the Center for Space Physics, Boston University)First author draf