[en] A thin layer of polycrystalline Si is deposited on an insulator such as SiO₂ grown on a Si wafer (active elements may be built on it) or a glass substrate, then it is melted to regrow into a single crystalline film of device quality, on which active elements are fabricated. Various energy sources are used in this process including carbon heater, spot and shaped laser or electron beams The line-shaped electron beam with a very high energy density of over 1 MW/cm² seems the most promising one due to its capabilities of generating fewer crystalline defects, negligible thermal effects to the underlying substrate and a high through-put, the most desirable features for 3-dimensional integration which should resolve the difficulties encountered in the present 2-dimensional integration

[en] A thin layer of polycrystalline Si is deposited on an insulator such as SiO₂ grown on a Si wafer (active elements may be built on it) or a glass substrate, then it is melted to regrow into s single crystalline film of device quality, on which active element are fabricated. Various energy sources are used in this process including carbon heater, spot and shaped laser or electron beams. The line-shaped electron beam with a very high energy density of over 1 MW/cm² seems the most promising one due to its capabilities of generating fewer crystalline defects, negligible thermal effects to the underlying substrate and a high through-put, the most desirable features for 3-dimensional integration which should resolve the difficulties encountered in the present 2-dimensional integration. (author)

[en] A series of tests called 'Model Tests for Evaluation of Seismic Behavior of Reactor Buildings' has been carried out by the Nuclear Power Engineering Corporation (NUPEC), under the sponsorship of the Ministry of International Trade and industry (MITI) of Japan. As a part of the tests, a total of 23 wall specimens were tested to discuss the effect of small openings on strength and stiffness of shear walls in reactor buildings. Parameters tested were shape, number and local arrangement of openings. Reversed cyclic loads were applied to the specimens and their strength and restoring force characteristics were compared with each other to understand the effects of those parameters. Based on the test results, two methods for predicting the shear strength of walls with numerous small openings are examined in this paper. One is a direct method to calculate the strength along assumed failure lines, and the other is a method to estimate design factors used in practice. Both methods are found to be useful to roughly estimate the strength of shear walls with openings. It is also shown that the stiffness of such walls may be evaluated by a combined multi spring model. (author)

[en] We study a new algorithm of numerical multi-dimensional integration based on stochastic sampling method, which is originally studied for computer graphics to generate homogenous sampling points on implicit surface. The experience of this algorithm with a preliminary implementation is discussed

[en] A simple model for nonlinear analysis of 3-Dimensional (S-D) reinforced concrete (R C) shear walls under cyclic loading by finite element method (FEM) is proposed in this study. The analysis and the comparison with the experimental results demonstrated that the model had good accuracy. (author). 8 refs., 7 figs., 2 tabs

[en] We report the free flux flow (FFF) resistivity associated with a purely viscous motion of the vortices in moderately clean d-wave superconductor Bi:2201 in the strongly overdoped regime (T_c=16 K) for a wide range of the magnetic field in the vortex state. The FFF resistivity is obtained by measuring the microwave surface impedance at different microwave frequencies. It is found that the FFF resistivity is remarkably different from that of conventional s-wave superconductors

[en] We measured the flux flow resistivity ρ_f associated with a purely viscous motion of the vortices in high-quality MgB₂ by the microwave surface impedance. The flux flow resistivity exhibits unusual field dependence with strong enhancement at low fields, which is markedly different from that in conventional s-wave superconductors. A crossover field which separates two distinct flux flow regime with different slope of ρ_f was observed in H parallel ab-plane. The unusual H-dependence indicates that two very differently sized superconducting gaps in MgB₂ manifest themselves clearly in the vortex dynamics and nearly equally contribute to the energy dissipation

[en] Uranium crystallization process has been developed as a part of advanced aqueous reprocessing system. In the process the great part of uranium is separated from dissolver solution by crystallization as uranyl nitrate hexahydrate (UNH). Two types of experiments were carried out to clarify the plutonium behavior under the condition of the uranium crystallization. Hexavalent plutonium is co-crystallized with uranium and tetravalent plutonium is not, although plutonium concentration is lower than that expected by its solubility. Therefore, the adjustment of plutonium valence at tetravalent is needed in order to avoid co-crystallization of plutonium with uranium. (authors)

[en] The PUREX process in the advanced fuel. recycle will be simplified, in order to achieve cost reduction, waste minimization for environment and nuclear proliferation resistivity. One of applicable technologies to support the PUREX process is crystallization of uranium prior to the solvent extraction. Crystallization requires neither extracting solvent nor additional reagent. Therefore, it can contribute to reduce the volume of waste solution and the size of equipment of the reprocessing process. First we designed the process adapted crystallization technology and the reference process simplified PUREX. Next we compared both processes in equipment and mass flow. When the process adapted crystallization is introduced, equipment and vessels are miniaturized. Mass flow is also reduced certainly, and extra nitric acid and very low-level liquid waste is decreased largely. The PUREX with crystallization is helpful to improve the reprocessing process. (authors)

[en] The authors have measured the surface resistance and transmittivity of overdoped Tl₂Ba₂CuO_6+δ in magnetic field up to 7 T in order to investigate the unusual dc resistive transition. Introduction of columnar defects largely shifts the irreversibility line to higher field, showing that the resistive transition is caused by the melting of the vortex lattice. It is found that flux flow resistance of this compound is unusual as compared with that expected from the dc resistivity