Sample records for yugen yoso kaiseki

  1. Finite element analysis of the laminated rubber bearingused in base isolation system. Sekiso gum isolater no yugen yoso kaiseki

    Takayama, M.; Tada, H. (Fukuoka Univ., Fukuoka (Japan). Faculty of Engineering)


    Characteristics of the laminated rubber bearing for a base isolation system of buildings were analyzed by a finite element method. Instead of an elastic modulus and Poisson {prime} s ratio, the rubber material was characterized by a strain energy function for modeling, and material constants were determined in the biaxial tensile test of rubber sheets before analyzing. The nonlinear stress analysis program based on a modified variational principle was used together with the model with 4,136 elements and 7,120 nodes in total. The compressive analysis was conducted up to 1,000kgf/cm {sup 2} in compressive stress, and the compressive shearing one up to 370% in horizontal deformability (ratio of horizontal deformation to total rubber thickness). As a result, the load-deformation characteristics were well agreed between the analysis and experiment. Large strain was observed in the periphery of the rubber bearing and no strain in the central portion under a compressive load condition, while uniform strain was observed over the central area under a compressive shearing load condition. 7 refs., 26 figs.

  2. Structural response analysis of very large floating structures in waves using one-dimensional finite element model; Ichijigen yugen yoso model ni yoru choogata futai no harochu kozo oto kaiseki

    Fujikubo, M.; Yao, T.; Oida, H. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering


    Formulation was made on a one-dimensional beam finite element which is effective in analyzing structural response of very large floating structures by modeling them on beams on an elastic foundation. This element allows strict solution of vibration response in the beams on the elastic foundation to be calculated efficiently for a case where mass and rigidity change in the longitudinal direction. This analysis method was used to analyze structural response of a large pontoon-type floating structure to investigate mass in the end part for the structural response and the effect of decay while passing the structure. With a pontoon-type floating structure, reduction in bends and bending stress in the end part of the floating structure is important in designing the structure. Reducing the mass in the end part is effective as a means to avoid resonance in these responses and reduce the responses. Increase in rigidity of a floating structure shifts the peak in quasi-static response to lower frequency side, and reduces response in resonance, hence it is advantageous for improving the response. Since incident waves decay while passing through the floating structure, response in the lower wave side decreases. The peak frequency in the quasi-static response also decreases at the end part of the structure in the upper wave side due to decay in wave force. 7 refs., 11 figs., 1 tab.

  3. Development of new finite element by source method. 2nd Report. Plate bending element; Source wo mochiita atarashii yugen yoso no kaihatsu. 2. Itamage yoso

    Neki, I.; Tada, T. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan)


    This paper reports a method to develop a new finite element by source (FES) for a two-dimensional plane problem and a three-dimensional solid problem as a method to analyze ship body structures. The paper describes development of a plate bending element by using a similar method, and the fundamental principle thereof. The present method can prepare a finite element of an arbitrary shape by simply providing a contact point only on a boundary. It can also derive good calculation accuracy with less number of contact points and elements. These facts are shown by examples of analyses on a square plate, a triangle plate and a semi-circular plate. Particularly, since a plate bending problem has a large order of differential calculus in a governing equation, this method being a semi-analytical method derives a result with very good accuracy even with less number of contact points. A hypothetical boundary method or a hypothetical electric charge method presents not a very high accuracy even if a large number of contact points are provided. This is because the method hypothesizes only a bending moment vertical to the boundary, but does not consider a source of the moment relative to the boundary. In contrast, the present method hypothesizes both of bending and twisting as the sources, hence its accuracy is better than with the above two methods. 5 refs., 11 figs., 7 tabs.

  4. Shotetsu's View on Yugen%正彻的幽玄论



    正彻认为幽玄作为一种歌体,不同于"余请体",也不是表现崇高美的"物强体",而是类似于"物哀体"。其"幽玄"论的美学属性,以"物哀"为根基,但它所展现的不是歌人对人生无常的即景式感慨,而大多融入了"本歌取"式的创作技巧,显示出女性的、梦幻的特点。未脱离人世的妖艳梦幻般现实,不仅构成正彻幽玄论的充分条件,而且是必要条件。%Shotetsu believes that as a Style of Waka, Yugen is different from which is called Yojo Style, and also Momozuyoki Style ,which indicates beauty of maganificence.It's similar to which is called Mononoaware Style. But in Syotetu's view,the aesthetic meaning of Yugen is not inspired by the Waka Wirters' illusory feeilings on life,but a rational and technical use of Honkedori. For this reason,Shotetsu's view on Yugen could be seen as fantastic and dream-like. Inspite of that, the fantastic dream which Shotetsu pursuits, is not in the heaven but in where humankind lives,so we can say that the dream-like reality concludes the whole meaning of Shotetsu's view on Yugen.

  5. Calculated g -factors of 5 d double perovskites Ba2NaOsO6 and Ba2YOsO6

    Ahn, Kyo-Hoon; Pajskr, Karel; Lee, Kwan-Woo; Kuneš, Jan


    Using Wannier functions to represent the density functional results we calculate the hybridization corrections to the orbital momentum operator in the Os 5 d shell of the Mott insulators Ba2NaOsO6 and Ba2YOsO6 . The g -factors are obtained by evaluating the spin and orbital momentum operators in the atomic ground states of the Os ion. While the hybridization corrections play a minor role in the d3 ion of Ba2YOsO6 with a dominant spin moment, they are instrumental for the observation of the nonzero g -factor of the d1 ions of Ba2NaOsO6 . In addition, we analyze the exchange interactions in Ba2YOsO6 and find them to be consistent with the reported magnetic structure.

  6. Finite element analysis of the stress[approximately]deformation behavior considering the execution procedures during shield work. Yugen yosoho ni yoru shield koji no seko katei wo koryoshita jiban kyodo kaiseki

    Akagi, H.; Komiya, K. (Waseda University, Tokyo (Japan). School of Science and Engineering)


    A technique to analyze the ground behavior in shield tunnel work by use of the finite element method in consideration of the construction process is suggested. It is shown that the analysis of excavation of a shield machine with use of the force of jack propulsion is possible by modelling the excavating situation of the shield machine by arranging excavating elements in the assumed region where the ground is disturbed by excavation in front of the cutting face of the shield machine and re-dividing the excavating element and ground element for each calculation step. Succeedingly it is described that a shield work made in alluvial cohesive clay in the suburbs of Tokyo was applied with three-dimensional elasto-plastic finite element analysis which models the situation that the shield machine is driven by jack propulsion force while taking the ground in front of the shield machine into the machine, and, as a result of this, a result of calculation close to the observed results in the construction was obtained concerning the situation of displacement of ground and varying conditions of the posture of the shield machine and the hydraulic pressure of gap. 14 refs., 15 figs., 2 tabs.

  7. Frustrated fcc antiferromagnet Ba2YOsO6 : Structural characterization, magnetic properties, and neutron scattering studies

    Kermarrec, E.; Marjerrison, C. A.; Thompson, C. M.; Maharaj, D. D.; Levin, K.; Kroeker, S.; Granroth, G. E.; Flacau, R.; Yamani, Z.; Greedan, J. E.; Gaulin, B. D.


    We report the crystal structure, magnetization, and neutron scattering measurements on the double perovskite Ba2YOsO6 . The F m 3 ¯m space group is found both at 290 K and 3.5 K with cell constants a0=8.3541 (4 ) Å and 8.3435 (4 ) Å, respectively. Os5 + (5 d3 ) ions occupy a nondistorted, geometrically frustrated face-centered-cubic (fcc) lattice. A Curie-Weiss temperature θ ˜-700 K suggests the presence of a large antiferromagnetic interaction and a high degree of magnetic frustration. A magnetic transition to long-range antiferromagnetic order, consistent with a type-I fcc state below TN˜69 K, is revealed by magnetization, Fisher heat capacity, and elastic neutron scattering, with an ordered moment of 1.65(6) μB on Os5 +. The ordered moment is much reduced from either the expected spin-only value of ˜3 μB or the value appropriate to 4 d3 Ru5 + in isostructural Ba2YRuO6 of 2.2(1) μB, suggesting a role for spin-orbit coupling (SOC). Triple-axis neutron scattering measurements of the order parameter suggest an additional first-order transition at T =67.45 K, and the existence of a second-ordered state. Time-of-flight inelastic neutron results reveal a large spin gap Δ ˜17 meV, unexpected for an orbitally quenched, d3 electronic configuration. We discuss this in the context of the ˜5 meV spin gap observed in the related Ru5 +,4 d3 cubic double perovskite Ba2YRuO6 , and attribute the ˜3 times larger gap to stronger SOC present in this heavier, 5 d , osmate system.

  8. Numerical analysis of natural convection o thermo-electrically conducting fluids in a square cavity under a constant magnetic field. 3rd Report. ; Calculated results, frequency characteristics. GSMAC yugen yosoho ni yoru naibu hatsunetsu wo tomonau denji netsuryutai no seihokei Cavity nai shizen tairyu kaiseki. 3. ; Keisan kekka, shuhasu tokusei

    Oki, Y.; Tanahashi, T. (Keio University, Tokyo (Japan). Faculty of Science and Technology)


    An elucidation has been made on features of two magnetic field analysis schemes in analyzing natural convection in an electromagnetically heated fluid. A quantitative discussion has also been given on the cyclicity inherent to a low-Prandtl number fluid. Twin vortices in an induced magnetic field at the center of a square cavity had Lorentz force that accelerates convection acted on them. However, as the magnetic field strength increases, the twin vortices have disappeared, with only the secondary vortices remaining on four corners of the cavity where Lorentz force that suppresses convection acts on. The motion energy and the frequency characteristics of fluid magnetic cross helicity have verified quantitatively how a flow transfers from a cyclic flow to a steady flow as the magnetic field strength increases. It was indicated that the numerical residual method has superior convergence in solution of Poisson equations except for the initial stage under a weak magnetic field to the cross helicity. It was also shown that the numerical residual method has superior solution convergence from the initial stage under a strong magnetic field. Particularly for the case with large Joule heat generation, degradation in the calculation efficiency for the numerical residual method is more remarkable than in the cross helicity method. 8 refs., 10 figs.

  9. Numerical analysis natural convection of thermo-electrically conducting fluids in a square cavity under a uniform magnetic field. 4th Report. Stable numerical scheme for low magnetic Reynolds numbers: scheme verification; GSMAC yugen yosoho ni yoru naibu hatsunetsu wo tomonau denji netsu ryutai no seihokei cavity nai shizen tairyu kaiseki. 4. Teijiki Reynolds su de anteina kaiho: scheme no kensho

    Oki, Y.; Tanahashi, T. [Keio University, Tokyo (Japan). Faculty of Science and Technology


    In the present paper, the natural convections of thermo-electrically conducting fluids in a square cavity under a uniform magnetic field are calculated using GSMAC-FEM in conjunction with the so-called B method. This scheme efficiently satisfies conservation laws of both mass and magnetic flux. In order to establish a stable numerical scheme at low magnetic Reynolds number problems, we introduce both the generalized trapezoidal method and the 3-level fully implicit method into the conventional numerical residual method. The numerical results obtained are in good agreement with the past numerical and experimental results. 13 refs., 7 figs., 2 tabs.

  10. Quantum spaces and the Riemann hypothesis; Ryoshi kukan to Riemann yoso

    Kurokawa, N. [Tokyo Inst. of Tech. (Japan)


    The Riemann zeta function is one of important functions in mathematics and appears in the quantum theory of the field, the Casimir effect, the super string theory, chaos and others in physics. The Riemann hypothesis is a hypothesis predicted by Riemann in 1859 that the every real part of the intrinsic zero point of the Riemann zeta function is 1/2 and is considered to be the most difficult problem in the modern mathematics. Efforts to solve this problem brought about developments of many fields in mathematics. This paper describes the Riemann hypothesis, related hypothesis by Hilbert and Polya, analogous matter of the Riemann hypothesis and the attempt of Haas. The clue of the solution of the Riemann hypothesis might exist in the way to understand the quantum spaces and further interaction between physics and mathematics is expected. 16 refs.

  11. Genomic analysis of hyperthermophilic archaea; Chokonetsusei kosaikin no genomu kaiseki

    Kato, C. [Japan Marine Science and Technology Center, Kanagawa (Japan)


    Whole genome sequences of five strains of microorganisms have been reported up to the present and many genome analysis projects are in progress in the world. Among archaea (archaebacteria), the genome analysis of Methanococcus jannaschii have been completed and the sequencing data are opened to public. While 134 regulatory genes were identified in Synechocystis sp. PCC 6803 (eubacteria, 3.6 genome size), only 7 regulatory genes were identified in M. jannaschii (1.7Mb). Difference of the genome size is believed to correspond to the quantity of the environmental stresses. In Japan, the genome analysis project on a new hyperthermophilic archaeon, Pyrococcus horikoshii is in progress. P. horikoshii was isolated in a deep sea hydrothermal vent. It shows barophilic growth at maximum high temperature of 103degC under pressure of 30MPa. Thus, the genome analysis of barophilic hyperthermophilic archaea is expected to contribute to the understanding of the origin of life and evolution. 19 refs., 4 figs., 1 tab.

  12. Noise analysis of ring blowers; Ring blow no soon kaiseki

    Ota, S.; Miyazawa, M. [Fuji Electric Co. Ltd., Tokyo (Japan)


    The Ring Blower (a commercial product name of a vortex flow blower developed and marketed by Fuji Electric) consists integratedly of a blower, a motor and a silencer. The blower has an impeller attached with 40 to 52 forward-inclined blades, and is small in size capable of outputting high wind pressure. This paper describes the noise analyzing technology used in developing the low-noise Ring Blower, mainly referring to practical applications. A spectral analysis revealed that the noise is composed of rotor blade rotation noise forming several peaks and turbulent noise showing gently-sloping distribution over a wide range of frequency band. Vibration of outer walls of a casing would generate noise which propagates as a sound wave. For such vibration noise as this noise which spreads out into endless space, a BEM analysis is an effective tool. For analyzing flows to optimize blade shapes and analyzing sound pressure distribution in a silencer, an FEM analysis is effective. As a result of applying these technologies, noise has been reduced by over 10 dB from that in conventional products. 2 refs., 12 figs.

  13. Production cars' featuring technologies derived from motor sports; Motor sports de hagukumareta shihansha no yoso gijutsu



    Many recent innovative automotive technologies are derived from motor racing. This paper focuses on some applications of these leading-edge technologies to production cars. (1) Mitsubishi's vehicle technology, derived from its World Rally Championship car 'LANCER'. (2) Toyota's racing engine technology. (3) Subaru's center differential technology, derived from its 4WD competition car 'IMPREZA'. (4) Nissan's aerodynamic and highly rigid body structure applied to 'SKYLINE'. (5) Hino's heavy duty truck air suspension system, derived from 'CAMION'. (author)

  14. Evaluation of paramagnetic species in coals with iodine doping technique; Yoso tenkaho wo mochiita sekitanchu no jojiseishu no hyoka

    Aizawa, S.; Kumagai, H.; Chiba, T. [Hokkaido University, Sapporo (Japan). Center for Advanced Research of Energy Technology


    Electron paramagnetic resonance (EPR) of coals was considered by using iodine doping technique. Sub-bituminous coal (WA) and bituminous coal (UF) were used to observe EPR spectra using microwaves. With the UF coal, strength of the narrow component of the spectra was found constant regardless of amount of the doped iodine, wherein radicals without interaction with iodine were detected. Strength of the broad component increased with the iodine doping amount, where in deviation of {pi} electrons was detected, which have been generated as a result of interaction between aromatic rings and iodine in the coals. Spin concentration of the WA coal with low coalification degree is constant regardless of the iodine doping amount, and the interaction of the iodine with the aromatic rings was found small. The higher the coalification degree, the more the aromatic ring structure grows, and electron donor capability for the iodine increases. In a system with the entire spin being uniform, the spectrum height shows a saturation phenomenon against increase in microwave output. A non-uniform system, in which the oriented spin forms small groups and is in local thermal equilibrium, does not show saturation, but increases monotonously. 2 refs., 5 figs.

  15. Simulation of tandem hydrofoils by finite volume method with moving grid system; Henkei koshi wo tsukatta yugen taisekiho ni yoru tandem suichuyoku no simulation

    Kawashima, H. [Ship Research Inst., Tokyo (Japan); Miyata, H. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering


    With an objective to clarify possibility of application of time-advancing calculated fluid dynamic (CFD) simulation by using a finite volume method with moving grid system, a simulation was performed on motion of a ship with hydrofoils including the control system therein. The simulation consists of a method that couples a moving grid system technology, an equation of motion, and the control system. Complex interactions between wings and with free surface may be considered automatically by directly deriving fluid force from a flow field by using the CFD. In addition, two-dimensional flows around tandem hydrofoils were calculated to solve the motion problem within a vertical plane. As a result, the following results were obtained: a finite volume method using a dynamic moving grid system method was applied to problems in non-steady tandem hydrofoils to show its usefulness; a method that couples the CFD with the equation of motion was applied to the control problems in the tandem hydrofoils to show possibility of a new technology for simulating motions; and a simulation that considers such wing interference as wave creation, discharged vortices, and associated flows was shown useful to understand characteristics of the tandem hydrofoils. 13 refs., 14 figs.

  16. Indirect boundary element method for three dimensional problems. Analytical solution for contribution to wave field by triangular element; Sanjigen kansetsu kyokai yosoho. Sankakukei yoso no kiyo no kaisekikai

    Yokoi, T. [Building Research Institute, Tokyo (Japan); Sanchez-Sesma, F. [Universidad National Autonoma de Mexico, (Mexico). Institute de Ingenieria


    Formulation is introduced for discretizing a boundary integral equation into an indirect boundary element method for the solution of 3-dimensional topographic problems. Yokoi and Takenaka propose an analytical solution-capable reference solution (solution for the half space elastic body with flat free surface) to problems of topographic response to seismic motion in a 2-dimensional in-plane field. That is to say, they propose a boundary integral equation capable of effectively suppressing the non-physical waves that emerge in the result of computation in the wake of the truncation of the discretized ground surface making use of the wave field in a semi-infinite elastic body with flat free surface. They apply the proposed boundary integral equation discretized into the indirect boundary element method to solve some examples, and succeed in proving its validity. In this report, the equation is expanded to deal with 3-dimensional topographic problems. A problem of a P-wave vertically landing on a flat and free surface is solved by the conventional boundary integral equation and the proposed boundary integral equation, and the solutions are compared with each other. It is found that the new method, different from the conventional one, can delete non-physical waves from the analytical result. 4 figs.

  17. Lightning observation on 77 KV transmission lines and survey on their failure modes. 77kV sodensen no kaminari kansoku to kosho yoso no chosa

    Katsuragi, Y.; Kato, K.; Yokotani, M. (Chubu Electric Power Co. Inc., Nagoya (Japan))


    It was intended to investigate comprehensively lightning arrestors to prevent two-line power failure due to lightning on a transmission line and the optical ground wire (OPGW), which was found lately problematical due to damages. Lightning observations were carried out for three years on lightning damages to the entire 77 kV transmission lines which carry both two items. This paper summarizes the discussions done by Chubu Electric Power Company of Japan on its 77kV Mizunami-Oi line in the Gifu prefectural district. The lightning observing equipment is an air-cored Rogowskii coil, consisted of a personal computer linked to series of processors and CPU buses including a lightning surge memory to catch lightning behaviors. The power supply is a lithium battery with a capacity of 90 AH which is light in weight and portable. The observation cost is as low as (1/20) of the conventional method. The use of the equipment clarified the lightning modes, and the data analyses elucidated the effects of the lightning arrestor, as well as reduced the power failures and determined the correlation of lightnings with lightning current waveforms which cause damages to the OPGW. The utilization of the developed lightning surge memory, the lightning arrestor operation annunciator, and the ground failure indicator resulted in a great deal of success. 5 refs., 20 figs., 15 tabs.

  18. Analysis of the moment caused by friction of cardan joint. Cardan joint no friction kishinryoku kaiseki

    Ono, K.; Yagi, Shida, T. (Atsugi Unisia Corp., Kanagawa (Japan))


    Analyzing the vibromotive force, generated by the friction, in generation morphology, level, dynamical characteristics, etc., through measurement of joint unit friction simulation of frictional vibromotive force and on-platform measurement of propeller shaft in vibromotive force, the present report investigated the influence of friction on the vehicle in sound vibration performance. By a vibromotive force measurement system, internally equipped with a piezoelectric type force meter, frictional vibromotive force could be quantitatively grasped. The friction must be appropriately controlled, because the moment, generated by it, is expected to be put in the vehicle by intermediation of a supporting point and adversely influence the sound vibration performance. Apart from the above, elucidation was made of relation between the ordinal number components of rotation of vibromotive force and friction, calculation of reaction force at the supporting point by the frictional measurement, relation between the joint angle and frictional vibromotive force, second couple force due to the friction, etc. 3 refs., 15 figs.

  19. Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki

    Ushijima, K.; Mizunaga, H.; Tanaka, T. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Hashimoto, K. [Kyushu Electric Power Co. Inc., Fukuoka (Japan)


    An automatic measurement system by means of conductive potential and self-potential methods (fluid flow tomography method) has been developed to measure the change of geothermal steam fluid during production and injection. For the fluid flow tomography method, the four-electrode configuration of the conductive potential method is adopted using the casing pipe of well as a current source. A lot of potential receiving electrodes are connected to the earth, preliminarily. The surface potential profile is measured, which is formed during the injection and production of the fluid through the well. Artificial and spontaneous potential profiles were continuously measured using this system during the hydraulic crushing tests at the test field of hot dry rock power generation at Ogachi-machi, Akita Prefecture. As a result of inversion analysis of self-potential data using a four-layer structural model of specific resistance, it was observed that the fluid injected at the depth of 711 m in the borehole permeated into the depth between 700 and 770 m in the south-eastern part of the well, and that the fractures propagated into the deeper part, gradually with the progress of hydraulic crushing test. 3 figs.

  20. Two-dimensional inversion of MT (magnetotelluric) data; MT ho no nijigen inversion kaiseki

    Ito, S.; Okuno, M.; Ushijima, K.; Mizunaga, H. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    A program has been developed to conduct inversion analysis of two-dimensional model using MT data, accurately. For the developed program, finite element method (FEM) was applied to the section of sequential analysis. A method in which Jacobian matrix is calculated only one first time and is inversely analyzed by fixing this during the repetition, and a method in which Jacobian matrix is corrected at each repetition of inversion analysis, were compared mutually. As a result of the numerical simulation, it was revealed that the Jacobian correction method provided more stable convergence for the simple 2D model, and that the calculation time is almost same as that of the Jacobian fixation method. To confirm the applicability of this program to actually measured data, results obtained from this program were compared with those from the Schlumberger method analysis by using MT data obtained in the Hatchobara geothermal area. Consequently, it was demonstrated that the both are well coincided mutually. 17 refs., 7 figs.

  1. Sorption mechanism of solvent vapors to coals; Sekitan eno yobai joki no shuchaku kiko no kaiseki

    Shimizu, K.; Takanohashi, T.; Iino, M. [Tohoku University, Sendai (Japan). Institute for Chemical Reaction Science


    With an objective to clarify the interactions between micropore structure of coal and solvent reagents, a sorption experiment was carried out under solvent saturated vapor pressure. Low-volatile bituminous coal, Pocahontas No. 3 coal, has the aromatic ring structure developed, and makes solvent more difficult to diffuse into coal, hence sorption amount is small. Methanol has permeated since its polarity is high. High-volatile bituminous coal, Illinois No. 6 coal, makes solvent penetrate easily, and the sorption amount was large with both of aromatic and polar solvents. Since brown coal, Beulah Zap coal, contains a large amount of oxygen, and hydrogen bonding is predominant, sorption amount of cyclohexane and benzene having no polarity is small. Methanol diffuses while releasing hydrogen bond due to its polarity, and its sorption amount is large. A double sorption model is available, which expresses the whole sorption amount as a sum of physical sorption amount and amount of permeation into coal. This model was applied when it explained successfully the sorption behavior of the solvents relative to coals, excepting some of the systems. However, also observed were such abnormal behavior as sorption impediment due to interactions between coal surface and solvents, and permeation impediment due to hydroxyl groups inside the coals. 1 ref., 10 figs., 2 tabs.

  2. Analysis methods for excavation and tunneling; Kussaku koji ni kansuru kaiseki shuho

    Kobayashi, A. [Iwate Univ., Morioka (Japan). Faculty of Agriculture


    The effect of groundwater in excavation is a problem regarding the issue of the excavation work. Accordingly, effective measures for spring water, deformation, stability and so forth may be expected if proper exploration of groundwater behavior in excavation is possible beforehand. However, highly reliable forecast is difficult in reality. The main reason for it is that it is not so easy to find out the nonuniformity of permeability of the ground. Seepage flow analysis method can be used if only the movement of groundwater is to be predicted, However, even for this, it is difficult to identify the prominent channel route in the ground beforehand. In existing analysis, only the appropriateness of prediction of whole flow out quantity from the excavation side can be discussed. In addition, finding out the sudden water gushing or escaped water beforehand is very difficult. However, prediction can be possible using numerical analysis in case of comparatively uniform ground. In this report, effect of groundwater behavior prediction on the analysis of excavation work is described and its evaluation method is outlined. 19 refs., 6 figs.

  3. Safety analysis of flexible manufacturing system. Flexible seisan system no anzen kaiseki ni tsuite

    Mochizuki, T.; Sato, H.; Masuda, Y.; Onikubo, I.; Nagaoka, T. (Numazu Industrial Research Institute of Shizuoka Prefecture, Shizuoka (Japan))


    The fault tree method is used recently as a representative method to operate more efficiently the flexible manufacturing systems (FMS) becoming increasingly larger in scale and more complex and evaluate the system safety and reliability in design stages. This paper describes attempts to analyze FMS safety using the method. The fault tree method pursuits summit events and important anomalies in an object system retroactively along the cause direction, and links anomalies to causes using such logic gates as and-gate and or-gate. The model structure of an FMS comprises automatic warehouses, unmanned transportation vehicles, NC lathes, machining centers, robots and stations, centrally controlled by a computer. Failures in the constituting components are dealt with hardwares and softwares given safety redundancy and programs. Since the trees are for cause factors derived from empirical failures, not all of abnormal events can be handled with the present status of the method. Future requirements may include component failure processing functions and bypass processing in the softwares for the FMS. 5 refs., 6 figs.

  4. Performance analysis in Japanese field test program; Field test data kara no chiiki hatsuden kaiseki hoho

    Sugiyama, H.; Kurokawa, K.; Uchida, D. [Tokyo University of Agriculture and Technology, Tokyo (Japan); Otani, K.; Sakuta, K.; Tsuda, I. [Electrotechnical Laboratory, Tsukuba (Japan); Oshiro, T.; Sakamoto, K. [Japan Quality Assurance Organization, Tokyo (Japan)


    Power generation characteristics are investigated using data collected in photovoltaic power generation field tests being undertaken by NEDO (New Energy and Industrial Technology Development Organization). The photovoltaic power generation system performance is evaluated by examining loss factors leading to degradation in system performance, with weather conditions such as variation in insolation and air temperature, inverter performance, and shadows cast by surrounding buildings taken into consideration. As the result, it is found that the important loss factors are degradation in module performance due to elevated temperature, drift in the maximum output control, degraded inverter performance due to input power variation, effect of shadows, etc. It is learned that system is greatly affected by degradation in module performance due to increased temperature in summer and by shadows in winter, the two being responsible for the output coefficient dropping to approximately 75% throughout the year. The output coefficient frequency distribution charts for the 75 test sites confirm that the rate is as low as 70-80% at many sites. As for the system operating time, it tends to be longer in West Japan where the annual insolation rate is higher. 3 refs., 10 figs.

  5. Seismic traveltime tomography by use of gridpoints discritization; Koshitenho ni yoru danseiha tomography kaiseki

    Hirai, T.; Watanabe, T.; Sassa, K. [Kyoto University, Kyoto (Japan). Faculty of Engineering


    Efforts were made to enhance analytical precision and stabilize the results in seismic traveltime tomography by use of a method wherein the velocity distribution is expressed as a continuous function interpolated by parameters respectively assigned to the gridpoints. In this method, the slowness data are regarded as the parameters respectively assigned to the gridpoints, and the slowness value at a given point is determined after interpolation by the gridpoints surrounding the said point. A method based on the variation principle was used for ray tracing. As the result, it was confirmed that this method determines the ray path and traveltime with high precision. A method of least squares using Lagrange`s multiplier was applied for inversion. Comparison was made between the use of cells and the use of gridpoints in the results of inversions performed for an inclined 4-layer structure model, when it was found that the values involving the boundaries between layers, inclinations of the layers, and velocities of seismic waves are ambiguous with the cells while those with the gridpoints are reconstructed roughly correctly. 5 refs., 7 figs., 1 tab.

  6. Eddy current analysis of permanent magnet dynamometers; Eikyu jishakushiki dinamo meter no kadenryu kaiseki



    The ultra-low inertia dynamometer equivalent to engines in inertia adopts a rare earth element magnet with large energy product, and simulates engine torque fluctuation by superimposing harmonic current on a stator coil. Since temperature rise is thus predicted by generation of fluctuating magnetic field due to the harmonic current or eddy current due to normal slot harmonics, sufficient study on eddy current loss is necessary for designs to prevent such performance drop. Eddy current analysis is under investigation by 3-D FEM for various size and shape magnets. The analysis example of an eddy current density distribution is illustrated for the one-pole section of the magnet stuck on a rotor surface which is divided into 4 parts along a rotor periphery. More precise analysis of such eddy current loss is scheduled for higher-reliability product design. (translated by NEDO)

  7. Reservoir characterization using artificial neural network; Neural network wo mochiita choryuso tokusei kaiseki

    Shimada, N.; Kozawa, T. [Japan National Oil Corp., Tokyo (Japan); Nishikawa, N.; Tani, A. [Fuji Research Institute Corp., Tokyo (Japan)


    Neural network is used for the prediction of porosity and permeability using logging data as reservoir characteristics, and the validity of this method is verified. For the prediction of reservoir characteristics by the use of seismic survey data, composite seismic survey records obtained by density logging and acoustic logging are used to experiment the prediction of porosity and permeability continuous along lines of wells. A 3-output back propagation network is used for analysis. There is a possibility that this technique when optimized will improve on prediction accuracy. Furthermore, in the case of characteristics mapping, 3-dimensional seismic data is applied to a carbonate rock reservoir for predicting spatial porosity and permeability. This technique facilitates the comprehensive analysis of core data, well data, and seismic survey data, enabling the derivation of a high-precision spatial distribution of reservoir characteristics. Efforts will continue for further improvement on prediction accuracy. 6 refs., 7 figs., 3 tabs.

  8. Development of the technology for commercialization of the industrial solar system. ; Development of the advanced heat process system (research of low-cost elemental devices, etc. (examination of elemental devices, etc. )). Sangyoyo nado solar system jitsuyoka gijutsu kaihatsu. ; Advancedter dot heat process gata system no kaihatsu (tei cost yoso kiki nado no chosa kenkyu yoso kiki nado ni kansuru chosa)


    To organize the technological schemes for lowering the costs of elemental devices, etc. in industrial solar systems, the factors that prevent cost reduction were examined and evaluated, and technologies that would lower costs were chosen. The factors that prevent the cost reduction of industrial solar systems were divided into economical factors (solar radiation, structure, strength, etc.) and efficiency factors (energy density, system, control, etc.) and investigation and evaluations were carried out for each type. The keywords for cost reduction were defined as a. new materials, new elemental devices, technology, b. unification, organization, integration, c. combined utilization, multi-aspect utilization, multi-function, d. practicality, comfortability, usability, e. mono-function, simplification, usage specific, f. policy, system, viewpoint, etc. While dividing the factors which would lower costs of elemental devices, etc. into elemental technology, devices, materials, unification with architectual structures, multi-purpose utilization, etc., the factors were also divided according to function: heatcollecting parts, heat transporting parts, heat storage parts, and systems. Performance evaluation according to the keywords and information about costs, etc. helped choose the problems.

  9. Three-dimensional modeling in the electromagnetic/magnetotelluric methods. Accuracy of various finite-element and finite difference methods; Denjiho MT ho ni okeru sanjigen modeling. Shushu no yugen yosoho to sabunho no seido

    Sasaki, Y. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    To enhance the reliability of electromagnetic/magnetotelluric (MT) survey, calculation results of finite-element methods (FEMs) and finite difference methods (FDMs) were compared. Accuracy of individual methods and convergence of repitition solution were examined. As a result of the investigation, it was found that appropriate accuracy can be obtained from the edge FEM and FDM for the example of vertical magnetic dipole, and that the best accuracy can be obtained from the FDM among four methods for the example of MT survey. It was revealed that the ICBCG (incomplete Cholesky bi-conjugate gradient) method is an excellent method as a solution method of simultaneous equations from the viewpoint of accuracy and calculation time. For the joint FEM, solutions of SOR method converged for both the examples. It was concluded that the cause of error is not due to the error of numerical calculation, but due to the consideration without discontinuity of electric field. The conditions of coefficient matrix increased with decreasing the frequency, which resulted in the unstable numerical calculation. It would be required to incorporate the constraint in a certain form. 4 refs., 12 figs.

  10. Relation between front suspension layout and handling performance. Analysis depending on the Taguchi method and ADAMS; Front suspension layout to soda tokusei no kankei ni tsuite. Kiko kaiseki gengo wo mochiita hinshitsu kogaku ni yoru kaiseki

    Okada, K. [Daihatsu Motor Co. Ltd., Osaka (Japan)


    A variation of suspension layout gives an influence to the vehicle dynamics. Examined the suspension layout variation to make the handling performance change small. Analyzed the effect of suspension layout variation about steering response delay and gain besides the tire wear effect and movable load. 3 refs., 12 figs., 4 tabs.

  11. Improvement of vibration and noise by applying analysis technology. Analytical study of surface sound radiation from automobile exhaust system. Kaiseki gijutsu wo oyoshita shindo-soon no kaizen. Haikikankei hoshaon no kaiseki

    Nakata, I.; Yoshihara, Y.; Yahagi, H. (Toyota Motor Co. Ltd., Aichi (Japan))


    The reduction of the noise from the automobile exhaust system is not only an important task for raising the quality of the products but also an important task for solving the noise pollution, and studies and analysis have been conducted for this purpose. However concerning the noise radiated from the surface of the exhaust system (surface sound radiation) although measures such as increasing the thickness of some boards, adding ribs or adopting laminated structure have been taken, there are few reports systematically analyzing and studying the generation phenomena. In this paper, the influences of the structure of various parts of the exhaust system on the surface sound radiation are studied and analyzed through real machine tests and finite-element method, etc. The results of the study show that the reflection behavior of pressure pulsation and wall stiffness in the pipes are good indicators for prediction of the radiated noise level. As the surface sound radiation from the exhaust system is generated in a very complicated situation including a lot of nonlinear phenomena, there are still many problems such as the disorder of the gas flow, treatment of the shock waves and the radiation characteristics from the walls, etc. remaining to be solved. 9 refs., 15 figs.

  12. Study on the performances of handling and stability influenced by the differential terms in the state variables; Soansei ni okeru jotai hensunai no bibun yoso ga seino ni oyobosu eikyo no kento

    Sugasawa, F. [Tamagawa University, Tokyo (Japan); Mori, H. [Nissan Motor Co. Ltd., Tokyo (Japan)


    The analysis method using the system matrix for state variables can not be applied to the analysis for the system has Complex Cornering Stiffness. The reason is there are differential terms in the state variables. It is found that the differential terms m the state variables can be changed to the constant terms in another state variables. 4 refs., 9 figs.

  13. Thermal conjugate analysis of first stage gas turbine blade; Gas turbine shodan doyoku onodo no rensei kaiseki

    Takahashi, T.; Watanabe, K.; Takahashi, T. [Central Research Institute of Electric Power Industry, Tokyo (Japan)


    Three-dimensional numerical analysis of heat transfer was conducted by thermal conjugate fields inside and outside a blade, which consist of convection heat transfer and thermal conduction. The target of the analysis was a 1st-stage blade of gas turbine with multiple cooling holes. In order to make an accurate estimation of the blade temperature, heat exchange in cooling passages, outflow of cooling air and effect of rotation were taken into account by the numerical method. Predicted distribution of surface temperature was in good agreement with the observed surface pattern on an actual blade. Also case studies for blade temperature were carried out using the present numerical method. It was shown that a temperature field inside the blade was severely influenced by the assumed distribution of inlet gas temperature and cooling air flow conditions. As a result, it is clear that the present analytical method is useful for prediction of blade temperature depended on various conditions in operation. (author)

  14. Diode laser pumped solid state laser. Part IV. ; Noise analysis. Handotai laser reiki kotai laser. 4. ; Noise kaiseki

    Sakurai, H.; Seno, T.; Tanabe, Y. (Asahi Glass Co. Ltd., Tokyo (Japan))


    Concerning the second harmonic generation(SHG) of diode laser pumped solid state laser using a nonlinear optical material, the researches are carried out to pracitically apply to the optical pickup. Therefore, the reduction of output optical noise has become the important researching subject. The theoretical and experimental analyses of noise generating mechanism were carried out for the system in which Nd;YAG as the laser diode and KTP (KTiOPO {sub 4}) as the nonlinear optical crystal were used. The following findings for the noise generating mechanism could be obtained: The competitive interaction between the polarization modes was dominant noise mechanism in the high frequency range from 1 to 20MHz and the noise could be removed sufficiently by using the QWP(quarter wave plate). On the other hand, the noise observed in the low frequency range from 100 to 200kHz depended on the resonance length, agreed qualitatively with the theoretical analysis of the noise to the competitive longitudinal modes and agreed quantitatively with the noise generating frequency range. 10 refs., 13 figs., 1 tab.

  15. Lightning arrester models enabling highly accurate lightning surge analysis; Koseidona kaminari surge kaiseki wo kano ni suru hiraiki model

    Ueda, T. [Chubu Electric Power Co. Inc., Nagoya (Japan); Funabashi, T.; Hagiwara, T.; Watanabe, H. [Meidensha Corp., Tokyo (Japan)


    Introduced herein are a dynamic behavior model for lightning arresters designed for power stations and substations and a flashover model for a lightning arresting device designed for transmission, both developed by the author et al. The author et al base their zinc oxide type lightning arrester model on the conventional static V-I characteristics, and supplement them with difference in voltage between static and dynamic characteristics. The model is easily simulated using EMTP (Electromagnetic Transients Program) etc. There is good agreement between the results of calculation performed using this model and actually measured values. Lightning arresting devices for transmission have come into practical use, and their effectiveness is introduced on various occasions. For the proper application of such devices, an analysis model capable of faithfully describing the flashover characteristics of arcing horns installed in great numbers along transmission lines, and of lightning arresting devices for transmission, are required. The author et al have newly developed a flashover model for the devices and uses the model for the analysis of lightning surges. It is found that the actually measured values of discharge characteristics of lightning arresting devices for transmission agree well with the values calculated by use of the model. (NEDO)

  16. Water quality and water pollution sources in Poyang lake, China; Poyang ko ni okeru suishitsu chosa to odakugen kaiseki

    Ito, M. [Shin-Nippon Meteorological and Oceanographical Consultant Co. Ltd., Tokyo (Japan)


    This paper summarizes the current status of water quality and pollution sources in Poyang Lake in China. The lake is located in Chianghsi Province of China, and a largest fresh water lake in China that flows out into the Yangtze river. The basin is surrounded by mountains on three sides and faces the Yangtze on one side, whereas the plains formed by the lake and the rivers flowing in extends in the center of the basin. The plains around the lake has the city of Nanchang, the capital of the province, the city of Jiujiang (both cities have a population of about 4 million, respectively), and four other cities with a size of one million people including Jingdezhen. Water supply system in the basin is used in a 37% area of the urban areas, and no sewage facilities of whatsoever are available as of 1991. The lake has COD of about 3 mg{times}1/l. No severe pollution by organic matters is seen. While the T-P concentration is at a high level, PO4-P is low. Majority of phosphorus flowing into the basin exists in the form trapped in soil particles. In order to maintain the current water quality in the future, waste water treatment is required in the basin. Construction of an oxidation pond in the vast land exposed during the drought period is a measure that can be tackled relatively easily. 1 fig., 4 tabs.

  17. Structural analyses of very large semi-submersibles in waves; Choogata hansensuishiki futai no harochu kozo oto kaiseki

    Iijima, K.; Yoshida, K.; Suzuki, H. [The University of Tokyo, Tokyo (Japan)


    An analysis method in which the technique of a vehicle obtained when a three-dimensional singular point distribution method and Kagemoto`s mutual interaction theory are combined was expanded for the fluid area was proposed as the structural analysis of very large semi-submersibles in waves. A partial structure method is used for the structure. In a fluid area, the number of unknown quantities appearing in a final expression could be largely reduced by introducing the new concept of a group body. In this process, both hydro-elasticity and hydrodynamic mutual interaction are considered. As a result, floating bodies that could not be previously calculated can be modeled as a three-dimensional frame structure and the response analysis in waves can be carried out without damaging the accuracy. The calculation result is used as the input data required for analyzing the structural fatigue locally during structural design of very large semi-submersibles in the 3,000 (m) class. This study can present a series of procedures between the response analysis of very large floating bodies in waves and the structural design. 11 refs., 14 figs., 1 tab.

  18. Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1

    Nagumo, S.; Muraoka, S.; Kaida, Y.; Takahashi, T. [OYO Corp., Tokyo (Japan)


    To effectively use the very shallow seismic reflection for active fault survey, a method has been investigated by which fault structures can be appropriately reconstructed from the fault information detected in the original records. The first step of reconstructing the fault system from the travel time reflection curve was to grasp an outline of fault structure from the patterns of travel time curve observed in the original record. For the very shallow seismic reflection method, especially, the low velocity layers in a shallow part succeeding from the ground surface made the issue complicated. Then, the travel time reflection curves were calculated in the case of existing several horizontal reflection surfaces in the surface layer. The constant values, mean velocities to the depth at individual reflection surfaces were used for the approximation of velocities. The outline of fault structure was grasped from the observation of original record. Then, the structure was reconstructed from the travel time curves. When the mean velocity in the medium was known, reconstruction of the feature of reflection surfaces from the travel time curves could be determined by simple mapping. When the mean velocity was unknown, it was calculated using the reciprocal travel time from the common reflection surface for individual reflection surfaces. 7 figs.

  19. Wavefield analysis in inhomogeneous media by wavelet transform; Wavelet henkan ni yoru fukinshitsu baitai no hadoba kaiseki

    Matsushima, J.; Rokugawa, S.; Kato, Y. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Yokota, T.; Miyazaki, T. [Geological Survey of Japan, Tsukuba (Japan); Ichie, Y. [The University of Tokyo, Tokyo (Japan)


    Data processing techniques have been investigated for clarifying structures and physical properties of geothermal reservoirs in the deep underground by seismic exploration using multiple wells. They include the initial motion time-distance tomography, amplitude tomography, diffracted wave tomography, and structure imaging using reflected wave or scattered wave. When applying these data processing methods to observed records, weak and minor signals essentially required are canceled due to averaging the analytical fields. In this study, influence of inhomogeneous media on the wavefield was evaluated. Data were analyzed considering frequency by using wavelet transform by which time-frequency can be easily analyzed. From the time-frequency analysis using wavelet transform, it was illustrated that high frequency scattered waves, generated by scatterer like cracks or by irregularity on the reflection surface, arrive behind direct P-wave and direct S-wave. 5 refs., 8 figs.

  20. Three-dimensional analysis of the magnetic structure in Hokkaido, Japan; Hokkaido no sanjigen jiki kozo kaiseki

    Makino, M. [Geological Survey of Japan, Tsukuba (Japan)


    The magnetic structure in Hokkaido was quantitatively analyzed by the magnetic anomaly distribution. This paper describes its characteristics. Detection of structural boundaries and 3-D analysis of double-layer structure were conducted for the regional magnetic data in a region with about 500 km square. There was not so large difference in patterns of magnetic anomaly distribution between the case that the direction of magnetization was set at 45{degree} to the west during the geomagnetic conversion according to Segawa and Oshima and the case that it was set as same as the current geomagnetic direction. The method of Blakely and Simpson was useful to detect the boundaries of magnetic structures. The structural boundaries obtained were more linear than the iso-magnetic contour lines. A new method has been conceived in which the approximation of 3-D magnetic structure analysis can be deduced, and the irregularity of magnetic basement can be determined by the repeated calculation. In practice, this method was applied to the magnetic data in the whole Hokkaido. The calculation was stably converged. It was found that the magnetic structure obtained in the Kamuikotan/Ishikari-Kitakami magnetic belt exhibited a fault structure having steep slopes accompanied by the basin structure in the western boundaries. 19 refs., 6 figs.

  1. Numerical analysis of tulip flame formation in a closed vessel. Yoki nai tulip kaen keisei no suchi kaiseki

    Kadowaki, S.; Ota, Y.; Terada, K. (Nagoya Inst. of Tech., Nagoya (Japan))


    The flame formation of the premixed flame propagating in a closed vessel varies considerably during the time from the start of its combustion to the end. In case where the length of the vessel is long in comparison with its width, the tulip flame formation is formed. In this article, in order to investigate the mechanism of tulip flame formation by means of numerical analysis, the unsteady motions of two-dimensional reactive flows were calculated using the explicit MacCormack scheme. The flame formation of every predetermined time propagating in the vessel was obtained and it was shown that the above formation changed from the semi-elliptic formation through the flat formation to the tulip formation. The tulip flame formation could be simulated fairly realistically by the calculation using the heat-insulating wall condition as the boundary condition, but the clear tulip flame formation could not be simulated by the calculation using the condition of a slippery wall or of the constant wall temperature. For the tulip flame formation, it was necessary to ignite the air-fuel mixture locally, but not flatly. Since the initial semi-elliptic flame reached the side wall of the vessel, the heating speed of the flame decreased and a dent was formed in the center of the flame. 21 refs., 12 figs.

  2. Interferometric SAR and land deformation. Analysis using the dislocation model; Interferometric SAR to chikaku hendo. Dislocation model wo mochiita kaiseki

    Matsushima, J.; Otaki, T.; Tanaka, A.; Miyazaki, Y. [Geological Survey of Japan, Tsukuba (Japan)


    The diastrophism by the earthquake-induced dislocation is investigated by interferometry (INSAR) which represents the diastrophism by the interference fringes of equiphase difference lines. A joint research group at Geographical Survey Institute and National Space Development Agency showed the diastrophism in the vicinity of the ground surfaces before and after the Hyogoken Nanbu Earthquake by the INSAR interference images in 1995. This paper discusses the effects of observation in the vision line direction from the satellite and dislocation parameters on the interference images. The dislocation model uses a slanted rectangular model in a semi-infinite medium, to calculate static displacements and strain distributions at the ground surface, when dislocation changes. It is found that the INSAR interference images, detecting displacements in the vision line direction from the satellite, significantly change as the vision line direction changes, and that the actual displacement cannot be given by the images alone. This paper also shows sensitivity of the interference images to the dislocation parameters. 3 refs., 9 figs., 1 tab.

  3. Structural analysis of microtubule-kinesin complex; Mota tanpakushitsu bunshi no kozo kaiseki ni yoru undo hassei kiko no kenkyu

    Toyoshima, Yoko [University of Tokyo, Tokyo (Japan). Graduate School of Arts and Sciences


    To understand the molecular mechanism of motor proteins which work in cell motility, the information of three dimensional structure of the complex between motor proteins and cytoskeletal filaments is important. Although crystal sacarato of kinesin motor domain and tubulin are determined respectively, their relative position in interacting state is unidentified. In this study, we made a series of several mutant kinesin motor domains which have reactive cystein using protein engineering methods, and labelled with gold clusters. Next, we formed the complex of these proteins and microtubules, and then embedded in amorphous ice. Three dimensional reconstitution of the complexes from the electron microscopic images can decide the position of the specific residue and relative position of kinesin motor domain and microtubules, which brings the structural basis to elucidate the molecular mechanism of motor proteins. (author)

  4. Development of simulation program for analysis of thermoforming process; Sheet jukuseigata process no tame no kaiseki gijutsu no kaihatsu

    Ishida, H.; Kihara, S.; Asano, K.; Ashibe, Y. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)


    Three-dimensional viscoelastic FEM code was developed to simulate thermoforming process of polymer sheet. The integral constitutive equation know as the K-BKZ model, where the stress is considered the integral of the time domain and some functions, is adopted and the model is newly formulated to solid element. Thermoforming process of a traveller's case was simulated. The validity of this method is demonstrated. (author)

  5. Application of numerical analysis to jet engine combustor design. Jet engine nenshoki sekkei eno suchi kaiseki no tekiyo

    Fuji, H. (Ishikawajima-Harima Heavy Industries, Co. Ltd., Tokyo (Japan))


    Numerical methods are applied in practice to complement and support jet engine combustor design and development. Part of the conventional design-trial fabrication-testing performance evaluation cycle replaced by iterated numerical analysis applied in a preliminary cycle of design-evaluation, undertaken before proceeding to actual trial fabrication testing and final evaluation. Presented examples are of numerical methods applied to design/development of a high temperature combustor of airblast fuel injector type, in which analysis is undertaken of flows through diffuser and through combustion liner, of temperature distributions, of flows through liner cooling slots, and liner skin temperature distributions. Furthermore, results of three-dimensional flow analysis are applied to optimizing the design parameters of a jet-swirl combustor and to calculation of the centrifugal force in a jet swirl combustion liner. 3 refs., 18 figs., 1 tab.

  6. Analysis of mixture formation of direct injection gasoline engine; Tonai funsha gasoline engine no kongoki keisei kaiseki

    Kano, M.; Saito, K.; Basaki, M. [Nippon Soken, Inc., Tokyo (Japan); Matsushita, S.; Gono, T. [Toyota Motor Corp., Aichi (Japan)


    On direct injection gasoline engine, in order to achieve good stratified combustion, the extremely advanced control of air-fuel mixture is required. For this purpose, the method of diagnosing the quality of the state of mixture formation in combustion chambers becomes necessary. In this research, the state of air-fuel mixture in the combustion chamber of a TOYOTA D-4 was analyzed in space and time by visualization, A/F multi-point measurement and A/F high response measurement, thus the effects that injection timing, swirl and fuel pressure exerted to mixture formation were elucidated. 3 refs., 17 figs., 1 tab.

  7. Analysis of fuel spray characteristics for premixed lean diesel combustion; Kihaku yokongo diesel kikan ni okeru nenryo funmu kaiseki

    Sasaki, S.; Harada, a.; Miyamoto, T.; Akagawa, H.; Tsujimura, K.


    Premixed lean diesel combustion (PREDIC) makes it possible to achieve low NOx emission. It is an important factor to make the homogeneous spray formation for PREDIC. In this paper presents I the effect of the spray dispersion on emission characteristic were analyzed with the spray observation and engine test. Pintle type nozzle, which has different feature from orifice type nozzle, are used to form the hollow cone spray. As a result, the pintle type nozzle having grooves to generate the swirl flow, makes the reduced penetration in comparison with the hole nozzle under low ambient gas pressure. And it could improve THC, CO emissions at low NOx emission condition. 7 refs., 12 figs., 1 tab.

  8. Study of nozzle deposit formation mechanism for direct injection gasoline engines; Chokufun gasoline engine yo nozzle no deposit seisei kaiseki

    Kinoshita, M.; Saito, A. [Toyota Central Research and Development Labs., Inc., Aichi (Japan); Matsushita, S. [Toyota Motor Corp., Aichi (Japan); Shibata, H. [Nippon Soken, Inc., Tokyo (Japan); Niwa, Y. [Denso Corp., Aichi (Japan)


    Nozzles in fuel injectors for direct injection gasoline engines are exposed to high temperature combustion gases and soot. In such a rigorous environment, it is a fear that fuel flow rate changes in injectors by deposit formation on nozzles. Fundamental factors of nozzle deposit formation were investigated through injector bench tests and engine dynamometer tests. Deposit formation processes were observed by SEM through engine dynamometer tests. The investigation results reveal nozzle deposit formation mechanism and how to suppress the deposit. 4 refs., 8 figs., 3 tabs.

  9. Analysis of wheel motion on corrugated rail; Corrugation ga hasseishita rail wo sokosuru sharin no undo kaiseki

    Horie, A. [Tokyo Gas Co. Ltd., Tokyo (Japan); Ikuta, S.; Suda, Y. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science] Terumichi, Y. [Sophia University, Tokyo (Japan). Faculty of Science and Technology; Ono, S. [The University of Tokyo, Tokyo (Japan)


    An analysis is conducted into the compound vibration of a wheel/rail system which is a two-axle truck travelling on rails with corrugation type wear generated thereon. Each wheel is analyzed using an analysis model in which the travelling mass, contact spring (concentrated mass system of one degree of freedom), and rails provide a system of distributed constants. Calculation is then made about the variation in the contact force that occurs between the wheels and rails when the truck travels at a prescribed speed in a sector with corrugation (assumed to be sinusoidal) generated on the rails therein. It is then found that there is interaction between the front wheels and rear wheels, that the lateral vibration generated by the excitation of rails due to the traveling of the front wheels is transmitted through the rails to reach the rear wheels for their excitation for an increase in the variation in the contact force between the rear wheels and rails and that, vice versa, the travel of the rear wheels increases the variation in the contact force between the front wheels and rails. It is also found, concerning both front wheels and rear wheels, that there are periodic fluctuations, dependent on the wheelbase, in the amplitude of the contact force variation at the steady state and that the period, as compared with the wavelength of corrugation, is shorter in the front wheels and longer in the rear wheels. 4 refs., 5 figs.

  10. Inversion interpretation of the mise-a-la-masse data; Denryu den`i ho data no inversion kaiseki

    Okuno, M.; Hatanaka, H.; Mizunaga, H.; Ushijima, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    A program was developed for the inversion interpretation of the mise-a-la-masse data, and was applied to a numerical model experiment and to the study of data obtained by actual probing. For the development of this program, a program was used that calculated by finite difference approximation the potential produced by a linear current source, and studies were made through forward interpretation, inversion interpretation of the acquired apparent resistivity data, comparison with the true solution, accuracy and tendency, and the limitations. In the simulation of a horizontal 2-layer model, the parametric value after 20 repetitions converged with deviation of 1% or lower. This program was applied to the data from probing the Hatchobara district, Oita Prefecture, using a model wherein the target area was divided into 5 from east to west, and into 2 in the direction of depth. The result suggested that there was a large-scale low-resistivity body deep in the ground in the southeastern part of the investigated area. Furthermore, there was a spot detected in the direction of east-northeast that suggested an electric structure continuous in the direction of depth and a fault-like structure discontinuous in the transverse direction. 7 refs., 9 figs.

  11. Magnetic constraints of basement structure offshore of western Kyushu, Japan; Kyushu seiho kaiiki ni okeru jiki ijo no kaiseki

    Okuma, S.; Nakatsuka, T. [Geological Survey of Japan, Tsukuba (Japan); Ishihara, T. [Japan National Oil Corp., Tokyo (Japan)


    This paper describes the results from the qualitative analysis of magnetic anomalies offshore of western Kyushu and from an analysis by a three-dimensional two-layer model inversion. The analysis ranged from Kyushu on the east to Jeju Island on the west and from the southern part of the Korean Peninsula on the north to Tanegashima and Yakushima Islands on the south, namely, the area of 580km from east to west and 580km from south to north. The analytical data used was Magnetic Anomaly Map of Asia (GSJ and CCOP, 1994). In the qualitative analysis, a pseudogravity anomaly map and a pole gravity anomaly map were prepared from the total magnetic force anomaly map by means of a frequency filter operation. As a result, it was noted that two distinctive magnetic high belts existed in the margin of the Tunghai Shelf, extending from the sea area to the west of the Nansei Islands continuously to NNE, and being distributed transversely through the Goto sedimentary basin. Additionally, in the inversion analysis, it was demonstrated that the magnetic basement became shallow at the margin of the Tunghai Shelf north of latitude 31 degrees north, extending nearly in the NNE direction through west of the Goto Islands, west of Tsushima Island, and continuing to the southern coast of the Korean Peninsula. 6 refs., 4 figs.

  12. MT2-D inversion analysis in Kakkonda geothermal field; Kakkonda chinetsu chiiki ni okeru MT ho nijigen kaiseki

    Yamane, K.; Takasugi, S. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Miyazaki, S. [Japan Metals and Chemicals Co. Ltd., Tokyo (Japan); Uchida, T. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)


    Data, collected from an MT method-assisted survey conducted in the Kakkonda geothermal region in 1987, was re-examined, and a new structure was found. The review was carried out by use of a 2D analysis in the TM mode. According to the 1D analysis of 1987 and the geological data gathered then, it is estimated that the resistivity structure of this region runs in the northwest-southeast direction. A northeast-southwest traverse line was set for this analysis, orthogonal to the strike, and the impedance at each observation spot was caused to rotate to this direction across the whole range of frequency. Furthermore, in 1994-95, surveys were conducted using arrayed CSMT/MT methods. All these sum up to indicate that a high-resistivity region extends northwest in the southwestern part of the Kakkonda river but that there exists a low-resistivity region of several 10 Ohm m centering about the B traverse line. The high-resistivity region deep in the ground being the target of excavation in the Kakkonda region, to collect knowledge about this high-resistivity is important, and here the effectiveness of the 2d analysis has been verified. 5 refs., 11 figs.

  13. Improvement of two-dimensional gravity analysis by using logarithmic functions; Taisu kansu wo mochiita nijigen juryoku kaiseki no kairyo

    Makino, M.; Murata, Y. [Geological Survey of Japan, Tsukuba (Japan)


    An examination was made, in the two dimensional tectonic analysis by gravity exploration, on a method that was applicable from a deep underground part to a shallow geological structure by using logarithmic functions. In the examination, a case was considered in which an underground structure was divided into a basement and a covering formation and in which the boundary part had undulations. An equation to calculate a basement structure from a gravity anomaly was derived so that, taking into consideration the effect from the height of an observation point, it might be applicable to the shallow distribution of the basement depth. In the test calculation, a model was assumed reaching the depth near the surface with the basement being a step structure. Density difference was set as 0.4g/cm{sup 3}. An analysis using an equation two-dimensionally modified from Ogihara`s (1987) method produced a fairly reasonable result, showing, however, a deformed basement around the boundary of the step structure, with the appearance of a small pulse-shaped structure. The analysis using logarithmic functions revealed that the original basement structure was faithfully restored. 3 refs., 5 figs.

  14. Preliminaries on core image analysis using fault drilling samples; Core image kaiseki kotohajime (danso kussaku core kaisekirei)

    Miyazaki, T.; Ito, H. [Geological Survey of Japan, Tsukuba (Japan)


    This paper introduces examples of image data analysis on fault drilling samples. The paper describes the following matters: core samples used in the analysis are those obtained from wells drilled piercing the Nojima fault which has moved in the Hygoken-Nanbu Earthquake; the CORESCAN system made by DMT Corporation, Germany, used in acquiring the image data consists of a CCD camera, a light source and core rotation mechanism, and a personal computer, its resolution being about 5 pixels/mm in both axial and circumferential directions, and 24-bit full color; with respect to the opening fractures in core samples collected by using a constant azimuth coring, it was possible to derive values of the opening width, inclination angle, and travel from the image data by using a commercially available software for the personal computer; and comparison of this core image with the BHTV record and the hydrophone VSP record (travel and inclination obtained from the BHTV record agree well with those obtained from the core image). 4 refs., 4 figs.

  15. Three dimensional reflection velocity analysis based on velocity model scan; Model scan ni yoru sanjigen hanshaha sokudo kaiseki

    Minegishi, M.; Tsuru, T. [Japan National Oil Corp., Tokyo (Japan); Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan)


    Introduced herein is a reflection wave velocity analysis method using model scanning as a method for velocity estimation across a section, the estimation being useful in the construction of a velocity structure model in seismic exploration. In this method, a stripping type analysis is carried out, wherein optimum structure parameters are determined for reflection waves one after the other beginning with those from shallower parts. During this process, the velocity structures previously determined for the shallower parts are fixed and only the lowest of the layers undergoing analysis at the time is subjected to model scanning. To consider the bending of ray paths at each velocity boundaries involving shallower parts, the ray path tracing method is utilized for the calculation of the reflection travel time curve for the reflection surface being analyzed. Out of the reflection wave travel time curves calculated using various velocity structure models, one that suits best the actual reflection travel time is detected. The degree of matching between the calculated result and actual result is measured by use of data semblance in a time window provided centering about the calculated reflective wave travel time. The structure parameter is estimated on the basis of conditions for the maximum semblance. 1 ref., 4 figs.

  16. Relation between frequency of seismic wave and resolution of tomography; Danseiha tomography kaiseki ni okeru shuhasu to bunkaino no kankei

    Fujimoto, M.; Watanabe, T.; Ashida, Y.; Sassa, K. [Kyoto University, Kyoto (Japan). Faculty of Engineering


    With regard to the elastic wave exploration, discussions have been given on the relationship between frequency and resolution in P-wave velocity tomography using the initial travel time. The discussions were carried out by using a new analysis method which incorporates the concept of Fresnel volume into tomography analysis. The following two arrangements were used in the calculation: a cross hole arrangement, in which seismic source and vibration receiving points were arranged so as to surround the three directions of a region extending 250 m in the horizontal direction and 500 m in the vertical direction, and observation is performed between two wells, and a permeation VSP arrangement in which the seismic source is installed on the ground surface and receiving points installed in wells. Restructuring was performed on the velocity structure by using a total of 819 observation travel times. This method has derived results of the restructuring according to frequencies of the seismic source used for the exploration. The resolution shown in the result of the restructuring has become higher as elastic waves with higher frequency are used, and the size of the structure identified from the restructuring result has decreased. This fact reveals that sufficient considerations must be given on frequencies of elastic waves used according to size of objects to be explored. 4 refs., 4 figs.

  17. Fault analysis in the very shallow seismic reflection method. 2; Gokusenso hanshaho ni okeru danso kaiseki. 2

    Nagumo, S.; Muraoka, S.; Takahashi, T. [Oyo Corp., Tokyo (Japan)


    Fault analysis is required in addition to the ordinary process of structural analysis (CDP stacking) for the examination of discontinuity in the reflection horizon in question. The fault shape restoration principle is that the reflection point of a reflection wave observed at a certain receiving point is on an ellipse with the shock point and receiving point at its focal points and that the sum of the distances between the reflection point and the focal points is equal to the reflection wave propagation time. The DMO velocity is worked out by calculation using the positive travel time and inverse travel time from the common reflection surface. When the reflection surface is inclined by {theta}, the average interval velocity/cos{theta} is called the DMO velocity. When the reflection surface inclination and the average interval velocities are determined separately in this way, the position of the reflection point may be worked out, and this enables the calculation of the amount of migration (lateral movement). The reflection wave lineups carried by the original record are picked up one by one, and the average interval velocities are treated very prudently. After such a basic DMO conversion treatment, the actualities of the fault are described fairly correctly. 3 figs.

  18. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation for thin substrate polycrystalline solar cells (compound semiconductors and their fabrication technologies); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Usumaku taiyo denchi jitsuyoka no tame no kaiseki hyoka (kagobutsu taiyo denchi zairyo oyobi seisaku gijutsu no kaiseki hyoka)

    Oyagi, H.; Okada, Y.; Yamaguchi, H.; Shiota, T.; Kuroda, S.; Igarashi, O.; Tanino, H.; Makita, Y.; Yamada, A.; Kimura, S.; Ohara, A.; Niki, S.; Shibata, H.; Fons, P. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation for thin-film compound semiconductor solar cells. The study on epitaxial growth and optical properties of the thin films of CuInSe2 and CuGaSe2 evaluates the thin epitaxial films grown under various conditions, showing morphology of the defects at the interface of heteroepitaxial growth. These results are used to set the growth conditions under which a thin film of high luminescence by exciter recombination is produced. The study also gives information of luminescence transition in the vicinity of the band ends and of energy level between the bands. The study on structural analysis of the epitaxially grown thin films of CuInSe2 investigates dependence of lattice constants of the MBE-grown CIS layer on film thickness by the X-ray diffractometry based on the bond method. The study on epitaxial growth by the Se(CH3)2-halogen transfer method tests epitaxial growth of the single-crystalline Mo on a substrate of single-crystalline sapphire. 5 figs.

  19. Characteristic analysis of turbulent heat diffusion in a multi-compartment structure; Takukakuka kukan kozo ni okeru ranryunetsu kakusan gensho no kaiseki

    Hu, C.; Fukuchi, N. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    An analysis was made on turbulent heat diffusion in a multi-compartment structure necessary for designing calorific power and environment for functional systems used in marine vessels and off-shore structures. In a multi-compartment structure, the diffusion phenomenon is complex because of movement of air flow in turbulence and buoyancy resulted from non-isothermal condition. The phenomenon is largely affected by space shapes and walls, and the conditions in heat diffusion field is governed also by shapes of opening connecting the compartments. An analysis was made by using the SIMPLE method on turbulent heat diffusion in a multi-compartment space with high Raleigh number in which natural convection is dominant. If the opening is small, the Coanda effect appears, in which air flow passing through the opening rises along the wall, wherein a high-temperature layer is formed near the ceiling, making the heat diffusion inactive. If the opening is large, a jetting flow from the opening and a large circulating flow are created, which cause active advection mixture, making temperature gradient smaller in the upper layer. Heat transfer intensity in an opening on a partition wall decays in proportion with 1/4th power of the opening ratio. 7 refs., 11 figs.

  20. Identification of Fusarium oxysporum in the fluid of hydroponic culture using DNA analysis; DNA kaiseki ni yoru suiko saibai yoekichu no horenso ichobyokin

    Oyama, K.; Kawabata, T. [Chugoku Electric Power Co. Inc., Hiroshima (Japan)


    In the case of circularly using a fluid of the hydroponic culture for crops such as vegetable, the destructive damage is caused when specified harmful germs multiply in the growing crop. therefore, it is necessary to find the germs in question out and deal with them as quickly as possible. In this paper, studies were made on a sure identification technology of F. oxysporum using DNA analysis and the measures to prevent crop damages caused by diseases. The results of the study are reported. (translated by NEDO)

  1. Improvement of D.I. diesel engine combustion using numerical simulation; Chokufun diesel kikan no nensho kaizen shuho. Suchi kaiseki ni yoru torikumi

    Minami, T.; Adachi, T.; Isyii, Y. [Isuzu Motors Ltd., Tokyo (Japan)


    For the purpose of improving DI diesel engine combustion, it is important to predict air flow of intake and exhaust manifold, intake port flow, combustion chamber swirl and fuel spray combustion. This paper describes the application of numerical simulation to the engines, the analysis of phenomena and a problem of simulation model modification. (author)

  2. Dynamic stability analysis of circular arch subjected to follower forces with small disturbances; Judo kaju wo ukeru enkei arch no yuran ni yoru doteki kyodo to anteisei kaiseki

    Fukuchi, N.; Okada, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Hirano, Y. [Sumitomo Heavy Industries, Ltd., Tokyo (Japan)


    This paper describes the deformation and dynamic stability of circular arch subjected to follower forces in a submerged membrane type marine structure reinforced by arch frames. Governing equations for finite deformations of the circular arch subjected to follower forces are introduced using an embedded curve coordinate, which are formulated by applying Galerkin method. In addition, equations of motion due to small disturbances under given condition of loading are introduced. Based on these equations, dynamic stability of the arch is analyzed by means of Runnge-Kutta-Gill method, to clarify the relationship between disturbances and instability regions and the resulting phenomena. Near the boundary regions of stability, both amplitude and cycle of deformation are greatly affected by the amplitude of disturbances. The dynamic instability is governed by the inverse symmetry primary mode with minimum characteristic frequency which is specific for the circular arch. The dynamic stability has high parameter dependency, and the instability regions have a complicated shapes. Although flattened arch has a smaller static critical load, it provides the dynamic stability against the disturbance. 5 refs., 10 figs.

  3. Development of GIS for feasibility study on effective use of sewage heat; Gesui netsu yuko riyo kanosei kaiseki tsuru toshite no GIS no kaihatsu

    Ichinose, T. [National Inst. for Environmental Studies, Tsukuba (Japan); Kawahara, H. [Fujitsu Facom Information Processing Corp., Tokyo (Japan); Hanaki, K. [Univ. of Tokyo, Tokyo (Japan)] Matsuo, T. [Univ.of Tokyo (Japan). Graduate School


    Water and energy in addition to matter such as products and materials from outside flowed into the urban areas, and waste, sewage, the exhausted gas and the waste heat were released into the environment as a result of the urban action. This process is called the urban metabolism analogous to the metabolism of living things. Reducing loads to environment in the urban action is nothing but to optimize the urban metabolism structures. In this study, concerning districts of the heat supply facilities to effectively reuse the heat energy obtained from sewage being a representative unused energy in urban areas, GIS was developed for conducting the analysis on the spatial conformity to reuse the waste heat in the work of head demand and heat supply. The feasibility investigation on the effective use of the sewage heat was carried out as objective examples of 23 districts in Tokyo by using this method. It was confirmed that the relationship between heat demand and supply and the amount of usable heat depended on the land use in the district. 10 refs., 12 figs., 2 tabs.

  4. Surface behavior and kinetic analysis of macromolecules separated from beer in aqueous solution; Biru yori bunrishita kobunshi no suiyoeki deno hyomen kyodo to sono sokudo ronteki kaiseki

    Segawa, S.; Mitani, Y. [Sapporo Breweries Ltd., Tokyo (Japan). Brewing Research Lab.; Ogaki, K. [Osaka Univ., Osaka (Japan). Division of Chemical Engineering


    In a solution of macromolecules such as proteins that have surface activity, the macromolecules stabilize the foam by adsorbing at the bubble surface. These surface-active macromolecules at the gas/liquid interface lower surface energy. The macromolecules adhere to the gas/liquid interface, and then change their shapes. Hydrophobic groups in the molecule turn to the gas phase and hydrophilic groups turn to the liquid phase. The macromolecules separated from beer were dissolved in an acetic acid buffer solution, and then the surface behavior was speculated by the surface tension change. Their surface tension did not reach a constant value for several seconds, not like the low molecular solutions such as ethanol. The decrease in this surface tension could be kinetically analyzed. The surface tension decreased by the adsorption of macromolecules on the liquid surface, and by the shape changes in the molecule (the extension of molecule at the surface). In the {beta}-casein solution, the surface tension decreased in 2 steps that were more clear than in the beer macromolecule solution. This surface tension decrease is also supposed to show the adsorption of protein molecules and the shape change at the liquid surface. (author)

  5. Theoretical study on composition of gas produced by coal gasification; Sekitan gas ka de seiseisuru gas no sosei ni kansuru kosatsu (HYCOL data no doteki kaiseki)

    Kaiho, M.; Yasuda, H.; Kobayashi, M.; Yamada, O.; Soneda, Y.; Makino, M. [National Institute for Resources and Environment, Tsukuba (Japan)


    In relation to considerations on composition of gas produced by coal gasification, the HYCOL hydrogen generation process data were analyzed. From the fact that CO concentration (Y) decreases linearly with CO2 concentration (X), element balance of gasification of reacted coal was used to introduce a reaction analysis equation. The equation includes a term of oxygen excess {Delta}(amount of oxygen consumed for combustion of CO and H2 in excess of the theoretical amount), derived by subtracting the stoichiometric oxygen amount used to gasify coal into CO and H2 from the consumed oxygen amount. The {Delta} can be used as a reference to oxygen utilization efficiency. An equation for the {Delta} was introduced. Also introduced was a term for steam decomposition amount derived by subtracting the generated steam from the supplied steam. These terms may be used as a clue to permeate into the gasifying reaction process. This suggestion was discussed by applying the terms to gas composition value during operation. According to the HYCOL analysis, when a gasification furnace is operated at higher than the reference oxygen amount, coal supply variation is directly reflected to the combustion reaction, making the {Delta} distribution larger. In an inverse case, unreacted carbon remains in the furnace due to oxygen shortage, and shift reaction may occur more easily even if oxygen/coal supply ratio varies. 6 figs., 1 ref.

  6. Numerical analysis of the flow in a poppet valve using a streamline coordinate system; Ryusen zahyo wo mochiita pet bennai no nagare no suchi kaiseki

    Yu, K.; Takahashi, K.; Nonoshita, T.; Ikeo, S. [Sophia Univ., Tokyo (Japan)


    The present paper describes the numerical analysis of the flow through a poppet valve by a streamline-coordinate system. Using this system, poppet valves with various shapes can easily be analysed, because a streamline along a solid wall or a free surface can be chosen as a coordinate. Parameters used in this analysis are poppet shape (cone angle for conical type and radius for spherical type), seat chamfer width, seat chamfer angle, valve lift and flow rate. Discharge coefficients and flow forces acting on poppets were analysed in detail, The computed results were in good agreement with the experimental ones. The conclusions are as follows: The flow forces on the poppet decrease with an increase in valve lift; The flow force on the conical poppet with a sharp edge seat is larger than that with a chamfered seat; The flow force is almost independent of flow rate for sharp edge seat, but strongly dependent for chamfered seat. (author)

  7. Study of heart rate variability in driving situation by fractal analysis; Fractal kaiseki ni yoru untenchu no shinpaku hendo no bunseki

    Hirata, Y.; Nagaoka, M. [Mazda Motor Corp., Hiroshima (Japan)


    This paper will explain method of fractal analysis for heart rate variability, as measuring method of mental stress in vehicle driving. In the previous, although there was a measuring method of mental stress by RSA, a issue arise such as reliability of analysis, because driver`s heart rate affect by respiration and muscle motion as well. We have established a method to measure mental stress by fractal dimension. And tried it is the proving ground and public road driving. We have confident that it is more reliable than RSA to quantify driver`s mental stress and fatigue. 9 refs., 9 figs., 1 tab.

  8. Analysis of combustion in an ATAC engine with measurement of radical luminescence; Radical hakko keisoku ni yoru ATAC engine no nensho kaiseki

    Park, Y.; Oguma, H.; Ueda, H.; Iida, N. [Keio University, Tokyo (Japan)


    In order to make clear of the combustion mechanism and the frame structure in two stake, so called, active thermo-atmosphere combustion (ATAC) engine fueled by gasoline and methanol, we measured the 2-demensional images of OH, CH and C2 radical band spectra in both ATAC and SI combustion mode. From the results of pressure data in the cylinder, the heat release rate was calculated. We evaluated the correlation of radical luminescence intensity and the rate of heat release. 3 refs., 4 figs., 2 tabs.

  9. Measurement and theoretical analysis of the under-seal pressure of rotary engine apex seals. Rotary engine no apex seal no haiatsu no sokutei to kaiseki

    Matsuura, K.; Terasaki, K. (Aoyama gakuin Univ., Tokyo (Japan). School of Science and Technology)


    A fundamental structure of an experimental rotary engine, which satisfies the conditions for the actual machine and can provide the phenomena on the rotor in multichannel electrical signals, and a method of taking out the signals have been developed. The pressures under two apex seals at medium speed and up to high load were measured to obtain some new knowledges. The pressure under the apex seal of 6mm thickness decreased considerably than that of the working chamber when the rotation speed increased with high loads. On the other hand, the decrease was little with the apex seal of 3mm thickness. The temperature of the gas flowing into the underseal chamber, temperature of the sealing groove wall, and the values of the pressures in the working chamber before and after apex seals measured by a pressure sensor provided in the housing were compared with the values calculated by theoretical analysis method for the underseal pressure to clarify the effect of each factor on the underseal pressure. 13 refs., 18 figs., 1 tab.

  10. Seismic tomography analysis using finite differential calculation of the eikonal equation and reciplocal principle; Eikonal equation no sabunkaiho to sohan genri wo riyoshita danseiha tomography kaiseki

    Fujimoto, M.; Ashida, Y.; Watanabe, T.; Sassa, K. [Kyoto University, Kyoto (Japan)


    This paper describes the seismic tomography analysis of underground structures using finite differential calculation (FDC) and a reciprocal principle which points out that a propagation path is constant even if a source and receiver are exchanged with each other. Tomography analysis generally determines a ray length across each underground cell structure by ray tracing method to modify each cell slowness (inverse of velocity). Travel time field was determined by FDC of eikonal equation among ray tracing methods, and a wave propagation path was determined by reciprocity of elastic wave to carry out inversion. In conventional methods, since a wave length is assumed to be infinitesimal by ray theory, false modified slowness structures frequently appears depending on the density of a ray. Wave propagates in a certain width, and is affected by environment. The slowness was thus modified on the basis of the wave propagation path with a certain width by using not ray-tracing but reciprocity. By this modification, false structures were hardly found under a fine grid, and several propagation paths could be considered. 6 refs., 9 figs.

  11. Numerical analysis of the rheology of polymeric liquid crystals. 1st Report. Shear flow behavior; Kobunshi ekisho no rpheology no suchi kaiseki. 1. Sendanryu tokusei

    Chono, S.; Tsuji, T.; Taniguchi, A. [Fukui University, Fukui (Japan). Faculty of Engineering


    Finite difference solutions to the Doi equation without closure approximations in shear flow are obtained. The Maier-Saupe potential is used to model the mean-held potential which induces the nematic state. Under equilibrium conditions, an isotropic phase is stable when the nematic potential intensity U is less than 4.49 and the lowest value of U for which a nematic phase is stable is 5. In the presence of shear flow, three different types of rheological behavior exist depending on the magnitude of shear rate: aligning, wagging and tumbling. With increasing shear rate, in the aligning regime, the preferred angle has a maximum and the order parameter shows a monotonic increase. For U=6, the transitions from tumbling to wagging and wagging to aligning occur at shear rates of approximately 16 and 32, respectively. The first normal stress difference has a negative value in moderate shear rates which include the whole regime of wagging and a part of the tumbling and aligning regimes. 20 refs., 8 figs.

  12. Numerical analysis of polymeric liquid crystalline flows between parallel plates. Heiko heibankan ni okeru kobunshi ekisho no nagare no suchi kaiseki

    Chono, S.; Iemoto, Y. (Fukui Univ. (Japan). Faculty of Engineering); Taniguchi, A.; Tsuji, T. (Fukui Univ., Fukui (Japan). Graduate School)


    Liquid crystal is an anisotropic fluid having both fluidity possessed by liquid and optical anisotropy inherent in crystals. Heretofore, Doi theory, which was established in 1981, is the only theory that can describe the rheology behavior of polymeric liquid crystal. Conventionally, there have been studies carried out based on the Doi theory for clarifying the rheology characteristics of polymeric liquid crystal, but there have been very few in which the Doi theory is applied to the flow in a tube. In this paper, the simple shearing flows of polymeric liquid crystal are first described by employing the Doi theory, and then the results of analysis of flows between parallel plates are stated. The main results obtained are as follows. The orientation of polymeric liquid crystal is determined by relative magnitudes of the terms of average field potential and of velocity gradient. In the flows between parallel plates, the propotion of increase of flow rate increases with the pressure gradient, and polymeric liquid crystal possesses a shear-thinning viscosity like normal polymeric fluid. 14 refs., 7 figs.

  13. Numerical analysis of the rheology of polymeric liquid crystals. 2nd Report. Shear and extensional flow behavior; Kobunshi ekisho no Rheology no suchi kaiseki. 2. Sendan shinchoryu tokusei

    Chono, S.; Tsuji, T. [Kochi Institute of Technology, Kochi (Japan)


    The Doi equations have been directly computed for shear and extensional flow without closure approximations. An extension is imposed on the shear flow plane. It is well-known that for simple shear flow there are three orientation regimes, depending on the magnitude of shear rate; rotational (tumbling), oscillatory (wagging), and stationary (aligning) orientation behaviors. When we add an extension to simple shear flow, the time period of tumbling is increased, while the order parameter in the regime is almost unchanged. In the wagging regime, however, both the time period and the order parameter are increased. Transitions from the tumbling and wagging regimes to the aligning regime are induced when more than a certain magnitude of extension is imposed on a system. An extension has also an effect to make the first normal stress difference positive. Furthermore, motion of individual molecules has been analyzed by integrating the Langevin equation. It is found that the aligning state in shear and extensional flow is due to an approximately stationary behavior of individual molecules, while the aligning state in simple shear flow is an apparently stationary behavior of a group of many rotational molecules. (author)

  14. Construction of analysis system on personal computer for slope disaster information using remote sensing technology. Remote sensing wo riyoshita pasokongata no shamen bosai joho kaiseki system no kochiku

    Setojima, M. (Kokusai Kogyo Co. Ltd., Tokyo (Japan)); Goto, K. (Nagasaki Universtiy, Nagasaki (Japan). FAculty of Engineering)


    An analytical system with superposition of images which uses picture elements as a unit was developed to treat information obtained by remote sensing and other geographical information by superposing the images in order to extract the second information which expresses qualitatively and quantitatively the degree of slope disaster in the future, based on the first information about the damage caused by disaster and landform and geology. As necessary function for analytical system of the second information, precise correction of geometrical strain, superposition of images, visual reading treatment, and output of analytical result in map are listed and described respectively. Next, the detailed explanation of hardware and software of pilot system which used personal computer was given. The analytical procedure and result of land conditions around the landslide occurred at Nagano city in 1985 was shown. 3 refs., 1 fig., 1 tab.

  15. Development of newly engineering technology based on computer analysis for dust diffusion; Funjin kakusan kaiseki gijutsu wo kihon to shita atarashii engineering gijutsu no tenkai

    Ishii, K.; Murahashi, Y.; Kawakami, H.; Tanaka, K. [Nippon Steel Corp., Tokyo (Japan)


    Nippon Steel has made a comprehensive survey of the space environment designing technology that can precisely cope with the needs required for a space in a plant in a very wide range from the ventilation problem in steel mill to the turbulence problem in semiconductor plant, through accomplishing the development of computer analysis technology for dust diffusion that can estimate and control `air flow` and `dust movement` in an electric angstrom [furnace plant]. This paper describes the basic concept for establishing the computer analysis technology for dust diffusion and the concrete measures to solve accompanying problems, and further enters into details how the new engineering technology has innovated technical measures to solve problems, the new engineering technology which introduces a concept of both estimation and control to attain objects such as to curtail the equipment cost and so by estimating the `air flow` and `dust movement` to create both a new flow and movement depending on needs. 3 refs., 20 figs., 8 tabs.

  16. Application of potential distribution analysis technique for cathodic protection in seawater. Kaisuikei denki boshoku eno den'i bunpu kaiseki gijutsu no oyo

    Inagaki, S.; Miyazaki, M. (Toshiba Corp. (Japan). Heavy Apparatus Engineering Lab.); Kikuna, N.; Sato, T.; Nishino, Y. (Toshiba Corp., Tokyo (Japan). Principal Office)


    In order to design the cathodic protection of the equipments and piping facilities in the seawater quantitatively and more precisely, the research and development have been firstly advanced on the titanium made condenser and circulating water tubes as the object, and then the introduction of the numerical analysis to the corrosion phenomena has been tried. Through the steps such as the measurement of corrosion data for the input, the verification by the three dimensional model, the test by the actual equipments and facilities and so forth, a technology to get the potential distribution in the cathodic protection by the finite element method (FEM) has been developed. This analytical technology has the distinctive features as follows: Since this can make the compound model by combinating the different dimensions, the potential distribution analysis of the complicated structures with the various shapes and large scale can be done; In addition, if necessary, three dimensional potential distribution can be analyzed by using the three dimensional model. In this paper, accompanied with the plant orienting the compactification, a combination of the condenser with the ball cleaning facility and so forth, which have become to be required for the cathodic protection design with a higher accuracy, as well as the application example to the super stainless steel made seawater cooler and so forth are introduced. 2 refs., 16 figs., 3 tabs.

  17. Numerical analysis of combustion mechanism in iron bath type smelting reduction furnace. Tetsuyokugata yoyu kangenro ni okeru nensho kiko no kaiseki

    Shinotake, A.; Takamoto, Y. (Nippon Steel Corp., Tokyo (Japan))


    Introduction and numerical analysis based on mathematical model has been made on the combustion phenomena, and the obtained results are used to analyze material and heat balance in the smelting reduction furnace. Distribution of gas flow, temperature and concentration into the furnace has been possible to estimate for the case where coke or coal is taken as raw material. Variation of dual combustion rate while changing supplied amount of coal species in smelting reduction experiment with 5t capacity, is explained. Under constant oxygen injection, one of the material and heat balance point which operates material and temperature at constant state by coal species and heat loss amount, has been determined, and dual combustion rate and heat efficiency at this point are determined simultaneously. Dual combustion rate and heat efficiency, the source unit of coal and oxygen have increased with the increase of amount of heat loss where as the production of molten iron decreased. Material and heat balance point is shifted to the point with less supply of coal and oxygen when prereduction degree of the ore is increased, and dual combustion rate and heat efficiency has increased. 11 refs., 7 figs., 4 tabs.

  18. Interactive steering of supercomputing simulation for aerodynamic noise radiated from square cylinder; Supercomputer wo mochiita steering system ni yoru kakuchu kara hoshasareru kurikion no suchi kaiseki

    Yokono, Y. [Toshiba Corp., Tokyo (Japan); Fujita, H. [Tokyo Inst. of Technology, Tokyo (Japan). Precision Engineering Lab.


    This paper describes extensive computer simulation for aerodynamic noise radiated from a square cylinder using an interactive steering supercomputing simulation system. The unsteady incompressible three-dimensional Navier-Stokes equations are solved by the finite volume method using a steering system which can visualize the numerical process during calculation and alter the numerical parameter. Using the fluctuating surface pressure of the square cylinder, the farfield sound pressure is calculated based on Lighthill-Curle`s equation. The results are compared with those of low noise wind tunnel experiments, and good agreement is observed for the peak spectrum frequency of the sound pressure level. 14 refs., 10 figs.

  19. Subsurface interpretation based on geophysical data set using geothermal database system `GEOBASE`. 2; Chinetsu database system `GEOBASE` wo riyoshita Kakkonda chinetsu chiiki no chika kozo kaiseki. 2

    Osato, K.; Sato, T.; Miura, Y.; Yamane, K. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Doi, N. [Japan Metals and Chemicals Co. Ltd., Tokyo (Japan); Uchida, T. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)


    Five cross sections were applied as a result of MT method investigations in addition to the results of conventional analyses at the Kakkonda geothermal area; three-dimensional resistivity distribution was made into a database by using the Kriging method which makes a matching with anisotropy of seismic center distribution in micro-earthquakes; and the database was compared with the data derived from surveys on the pilot survey well WD-1a and the side-truck well WD-1b thereof. As a result, it was found that the well WD 1b which encountered a water loss zone had the water loss zone exist in a region with relatively lower resistivity than in the well WD-1a which did not encounter a water loss zone. The region in which the water loss zone was encountered existed in a very steep slope region going from the high resistivity region in the west side toward the low resistivity region in the east side. This fact suggests a possibility that fractures have developed in this region with sharp slope in the resistivity in this area. Adding three-dimensional complementary function to the GEOBASE database by using a simple Kriging allowed the direction of anisotropy in spatial data to be freely and quickly decided. It was learned that this capability exhibits strong power in a mapping work in structures where such anisotropy as a geothermal zone is highly dominant. 5 refs., 8 figs., 2 tabs.

  20. Analysis on the R-R interval time series of automobile long distance drivers; Kosoku doro no chojikan soko ni yoru R-R kankakuji keiretsu kaiseki

    Moyoshi, M.; Takata, K. [Daido Institute of Technology, Nagoya (Japan); Yokoyama, K. [Nagoya Municipal Women`s College, Nagoya (Japan); Yoshioka, T.; Watanabe, Y. [Toyota National College of Technology, Aichi (Japan)


    Analyses were performed on change in living body information as time elapses while driving a car, the differences between automobile drivers and fellow passengers, and between automobile drivers and motorcycle drivers. A comparison on body temperatures in automobile drivers and motorcycle drivers shows sharper changes in the motorcycle drivers. Motorcycles, being different from automobiles, put the drivers exposed to atmosphere during driving, applying larger living body load. Adrenalin increases its concentration when a human is under mental load, so does noradrenalin when under physical load. Both of adrenalin and noradrenalin showed an increasing trend in the afternoon as compared with in the morning. From the comparison with the normal daily life, fellow passengers have also large mental living body load, who were found to have concentration change of nearly two times or more than that in normal conditions. A subject who rode in a car in the first experiment and drove a motorcycle in the second experiment was discovered to have his right hand grasping power decreased remarkably after the second experiment. Fatigue factors unique to motorcycle driving are thought the engine vibration, the hot air, the need of taking balance of the motorcycle attitudes, and stress from noise. 14 refs., 8 figs.

  1. Analysis of seismogram envelopes. State of the art and future developments; Jishin hakei no envelope kaiseki. Genjo to kongo no kadai

    Sato, H. [Tohoku University, Sendai (Japan)


    Reviewed herein are researches on seismogram envelopes of small earthquakes and observations. The physical exploration tries to search for coherent portions in the waves by array observation, to detect strong contrasts in underground structures. Analysis of seismogram envelopes is much different from the above. The coda wave in the seismogram of local earthquake is characterized by a structure of random short-waves overlapping three-dimensionally the upper surface of a gradually changing structure. This paper describes characteristics of heterogeneous earth structures and coda waves, modeling based on the radiation propagation theories, and simulation and analysis examples of 3-component, total waveform envelopes, based on the Born approximation in the theory of elasticity. It also outlines the envelopes, in the seismograms of earthquakes which have occurred in the Kanto and Tokai districts, changing from a pulse-shape to spindle-shape, theoretical models developed by diffractiometry for strongly random heterogeneous structures, and future research prospects. 37 refs., 28 figs.

  2. New magnetotelluric inversion scheme using generalized RRI method and case studies; GRRI ho ni yoru MT o nijigen inversion kaiseki to sono tekiyorei

    Yamane, K.; Takasugi, S. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Lee, K. [University of California, Berkeley, CA (United States); Ashida, Y. [Kyoto University, Kyoto (Japan)


    This paper describes a new two-dimensional (2-D) magnetotelluric (MT) inversion scheme. For the 2-D Frechet derivative scheme, the model correction values are calculated from the Jacobian matrix after the Taylor expansion of Maxwell`s equation. Although numerical solutions with high calculation accuracy and reliability can be obtained, it requires very large computer capacity and high speed load. While, the RRI (rapid relaxation inversion) approximation scheme proposed by Smith and Booker provides high efficiency in the computer capacity and speed load. However, since horizontal changes in the electric field or magnetic field are determined only from a single observation point for the calculation of model correction values, the calculation accuracy is inferior to that by Frechet scheme. In this study, improvement in the calculation was tried with keeping the efficiency of RRI scheme. The Maxwell`s equation was modified into form of perturbation method using magnetic field or electric field and conductivity of ground. The perturbed equation was then multiplied by a test function, to relate the boundary integral and region integral. A modified equation with 2-D property similar to RRI scheme could be obtained. Thus, results similar to those from the Frechet scheme could be obtained in a period similar to that by the RRI scheme. 11 refs., 17 figs.

  3. Clarification of interactions among microorganisms and development of co-culture system; Biseibutsukan sokosayo no kaiseki to kongo baiyo shisutemu no kaihatsu

    Taniguchi, Masayuki [Niigata University, Niigata (Japan). Dept. of Materials Science and Technology


    Co-culture systems containing two microorganisms for production of useful substances are described. The co-culture of Bifidobacterium longum and Propionibacterium freudenreichii, where lactic acid produced once from lactose by B. longum is converted to acetic and propionic acids by P. freudenreichii, was carried out. Thought the sequential conversion of lactose using the two microorganisms, the culture supernatant containing a mixture of acetic and propionic acids without lactic acid is produced. The antimicrobial activity of the mixture is higher than that obtained in the cultivation of B. longum alone. We developed a novel co-culture system composed of two fermentors and two micro filtration modules for efficient ethanol production from a mixture of glucose and xylose by co-culture of Pichia stipitis and Saccharomyces cerevisiae. The proposed co-culture system allowed regulation of the dissolved oxygen concentration at a level suitable for an individual yeast in each fermentor, as well as the successful exchange of culture medium between two fermentors. When P. stipitis and S. cerevisiae are cultivated individually under different oxygen supply conditions in the new co-culture system, the yield and productivity of ethanol from a glucose and xylose mixture are higher than in single culture of P. stipitis alone. By clarifying the interactions among microorganisms, new bioprocesses in which similar performance to co-culture systems is expressed even using a single microorganism, are expected to be developed for improvement of biochemical reaction systems. (author)

  4. Flow channel design of a multi-cavity mold by filling simulation for thermosets. Netsu kokasei jushi ryudo kaiseki ni yoru cavity tasuko tori kanagata no ryuro sekkei

    Saeki, J. (Hitachi Ltd., Tokyo (Japan)); Kaneda, A. (Hitachi Chemical Co. Ltd., Tokyo (Japan))


    A study was made on the flow channel design of a multi-cavity mold by filling simulation for thermosets. A practical analytic method was developed for the calculation of pressure losses at various locations in the channel following the estimation of viscosity change in the thermosets in the mold with optional shape. The runner and gate are designed for equal flow distribution to each cavity, and a newly developed model and a conventional type model were trially made for various evaluation using the conditions set at the time of designing. Ideal filling was achieved with the newly developed type model, and the design method of the type was confirmed to be reasonable. Characteristic values were studied which can be considered to give effect on the deformation of gold wires and void formation in molded devices. The effects on the prevention of gold wire deformation, decrease in void formation, and widening formation margin were confirmed. By the developed mold designing method, less diameter gold wire may be used without decreasing the quality of the package. 10 refs., 11 figs., 5 tabs.

  5. Study on sound excited by field. 2nd Report. Analysis of Rijke tube; Ba ni yotte reikisareru oto no kenkyu. 2. Rijke kan ni taisuru kaiseki

    Nishioka, A. [Hitachi, Ltd., Tokyo (Japan)


    For a thermoacoustic refrigerator or combustion oscillation, the secondary effect of oscillation is a ruling factor. A Rijke tube is made by the same effect and its structure is very simple. It has these characteristics: heat is released by heat conduction from a solid heat source, there is a stable flow, and it is an open system. The effects of excitation and dissipation for a Rijke tube are evaluated quantitatively. An equation of acoustic energy conservation which is a ruling equation for local area is integrated, then each term is solved. Analytic solution, transfer matrix method for vibration mode, and numerical calculation for the area around the heat source are used. There is a big density change in the area around the heat source, so the method used is adapted accordingly. A prediction of oscillation growth rate calculated by numerical simulation is compared with the experimental result. They are the same order. 8 refs., 12 figs.

  6. Numerical calculation of viscoelastic flows through eccentric abrupt contraction; Henshin kyushuku shoryuro ni okeru nendansei ryutai no nagare no suchi kaiseki

    Nakamura, K.; Mori, N.; Matsumura, K. [Osaka University, Osaka (Japan). Faculty of Engineering


    Numerical simulations of viscoelastic flows through an eccentric four-to-one abrupt contraction are carried out using the Giesekus model. The SMAC (Simplified-Marker-and-Cell) method is used to analyze the three-dimensional flows. The velocity profiles along the path line passing through the center of the exit exhibit an overshoot near the entry section, and at high Weissenberg numbers an undershoot follows the overshoot. The magnitude of the stress along the same path line has a peak near the entry, section, and its slow relaxation process indicates that a large downstream length is necessary for fully developed stress conditions to exist. The peak is lower than that for the flow through the concentric four-to-one abrupt contraction ; the decrease in the peak amplitude is understood to be due to the distortion of the path line in the eccentric geometry. A corner vortex, the height of which is a maximum at the widest corner, grows as the Weissenberg number increases. Furthermore, the tangential flow toward the widest section inside the vortex is determined. 19 refs., 10 figs.

  7. Application of numerical analysis method to jet engine combustion design. Jet engine yo nenshoki no sekkei ni okeru suchi kaiseki no tekiyo

    Negoro, T.; Arai, M.; Kuyama, T.; Nakahata, T.; Hirokawa, M. (Kawasaki Heavy Industries, Ltd., Tokyo (Japan))


    This paper describes features and applications of numerical analysis for jet engine combustor design. The numerical analysis for flow fields in a combustor has set a limitation on objects to be analyzed for each component element in the combustor or each design element, and carried out the analysis upon selecting basic formulas and models. The numerical analysis is effective to predict qualitatively the effects on flow patterns in the whole combustor liner interior or temperature distributions in the combustor liner interior, but is not sufficiently effective for use as quantitative evaluation. An application suggested that a parallel shape is more preferable that does not squeeze a flow outlet on the outer side that can be expected of providing sufficiently large recirculation flow region, as a result of analyzing the flow patterns around fuel injection valves. Dump diffuser analysis revealed that the above shape is preferable in supplying air stably from the annulus part into the liner interior through air holes. It was verified that the analysis of flows in the combustor liner has identified features of the flows qualitatively. 4 refs., 13 figs.

  8. Numerical flow analysis using the CFD method in axial flow compressor used for a jet engine. Jet engine yo jikuryu asshukuki no nagare kaiseki

    Arai, M.; Hashimoto, K.; Suga, S.; Matsuoka, A. (Kawasaki Heavy Industries, Ltd., Tokyo (Japan))


    Numerical fluid dynamics is used to solve numerically the Navier-Stokes equations including viscosity using a computer for the purpose of evaluating aerodynamic performance of compressor cascades, an element to constitute a jet engine. This paper discusses effectiveness and problems in this computation. A viscous flow analysis using this method was applied to actual two-dimensional compressor cascades that work in transonic regions. The analytic result may be summarized as follows: The method has high analytic accuracy and can predict aerodynamic characteristics if no separation occurs or it is limited in a flow field; however, the method does not assure quantitative accuracy for a flow accompanying separation and strong in non-steadiness; at this stage the method cannot be applied to three-dimensional problems, but is effective in identifying a flow field qualitatively; and while the supercomputer VP 200 required only two to three minutes to analyze a two-dimensional flow with 14000 lattices, the three-dimensional viscosity analysis required five hours. This method may be used effectively in a basic discussion stage for the initial design and in a simulation stage for improving a design. 11 refs., 18 figs., 2 tabs.

  9. Motion analysis of human cervical vertebrae and injury mechanisms during low speed rear impacts; Teisokudo tsuitotsu ni okeru ningen no keitsui kyodo kaiseki to shogai mechanism

    Ono, K. [Japan Automobile Research Institute Inc., Tsukuba (Japan); Kaneoka, K.; Inami, S.; Hayashi, K. [University of Tsukuba. Tsukuba (Japan)


    It is said that, as long as a head rest is used in an automobile, dilation of the cervical vertebrae will not extend the physiological range. However, neck injuries are still occurring frequently as a result of the rear collision accidents. This paper describes an experiment simulating low speed rear impacts by using ten volunteers for the purpose of clarifying the neck injury mechanism. Data taken by using a continuous X-ray photographing device were analyzed. The following points were made clear on features of collisions from comparison with normal cervical vertebral behavior: at a rear impact, the cervical vertebrae are subjected to action of axial compression force due to inertia of the neck, in addition to push-up of the body resulting in upward movement, and the force remains affecting the cervical vertebral behavior thereafter; the effect appears as a bending condition in the cervical vertebrae in the initial stage around 50 to 100 ms after the impact, and then transfers into dilation behavior; and this condition exceeds the normal physiologically movable range, particularly the movement of the winding center being abnormal, which is thought to involve in the mechanism of generating injuries in vertebral joints. 8 refs., 11 figs.

  10. Traffic flow characteristics and analysis on weaving sections of the Hanshin Expressway. Hanshin kosokudoro ni okeru orikomi kukan no kotsu jittai to kotsuryu kaiseki

    Makigami, Y. (Ritsumeikan Univ., Kyoto (Japan). Faculty of Engineering); Toyota, (Japan Highway Public Corp., Tokyo (Japan)); Matsuo, T. (Hanshin Expressway Public Corp., Osaka (Japan))


    The report is aimed at giving an idea about design of the weaving section or traffic plan, which describes the outline and the results of a series of traffic survay and capacity analysis on weaving section on the Central Loop and its neighboring section of the Hanshin Expressway in 1985 to 1990 by making use of both areal photographs taken from a helicopter and video recordings and which makes an effort to clear which area does the traffic jam caused by the narrow road affect on and how does the mechanism show while making search the characteristics of the traffic flow in a weaving section. Using these traffic data, the applicability of HCM-85 Weaving Capacity Analysis Method to the Japanese expressway is evaluated. It also makes a touch to the problems and study about analysis method of weaving section. 11 refs., 21 figs., 3 tabs.

  11. Ultimate strength analysis of long-span cable-stayed bridges; Chodai chachokyo no shukyoku kyodo kaiseki to kyodo ni kansuru ichikosatsu

    Xie, X.; Yamaguchi, H. [Saitama Univ., Urawa (Japan)] Nagai, M. [Nagaoka Technical Coll., Niigata (Japan)


    Recently, span of cable-stayed bridges has been getting loner and longer, present situation is that cable-stayed bridges with span 600 to 800m class have been built inside and outside the country, and accurate determination of its ultimate strength has been an important problem statistically. However, concrete design method for evaluating load bearing stress of long-span cable-stayed bridge. Particularly of the main beam whose axial stress is dominating, has not been established so far. As for cable-stayed bridge, even for long-span, effect of plasticization of cross section on ultimate strength is severe because there is little effect of geometric nonlinearity and it is thought that accurate evaluation of ultimate strength only by elastic finite potential analysis is difficult. Accordingly, it is necessary to study the behavior by using combined nonlinear analysis considering the nonlinearity of the material in order to evaluate the safety and economy to long-span cable-stayed bridge. In this report, 3 dimensional analysis method was formularized taking into account the combine nonlinearity of multi-box girder and analysis program of ultimate strength behavior of long-span cable-stayed bridge was developed. 19 refs., 17 figs., 2 tabs.

  12. Analysis of signal transduction in brain cells using molecular signal microscope; Bunshi jiho kenbikyo wo mochiita nousaibou no joho henkan kiko no kaiseki

    Kawato, Suguru [The University of Tokyo, Tokyo (Japan). Dept. of Biophysics and Life Sciences


    We analyzed the signal transduction in brain neurons by real-time imaging of Ca/NO signals using the Molecular Signal Microscope. We also analyzed synthesis and action of neurosteroids in the hippocampus. We discovered steroid synthesis machinery containing cytochrome P 450 scc in hippocampal neurons. We found that pregnenolone sulfate acutely potentiated NMDA receptor-mediated Ca conductivity in hippocampal neurons. We also found that stress steroid corticosterone acutely prolonged NMDA receptor-mediated Ca{sup 2+} influx, resulting in Ca-induced neuro-toxicity. (author)

  13. Fundamental analysis of thermally regenerative fuel cell utilizing solar heat; Taiyonetsu wo riyosuru netsu saiseigata nenryo denchi no kiso tokusei no kaiseki

    Ando, Y.; Tanaka, T.; Takashima, T.; Doi, T. [Electrotechnical Laboratory, Tsukuba (Japan); Aosawa, T.; Kogoshi, S. [Science University of Tokyo, Tokyo (Japan)


    Study was made on a thermally regenerative fuel cell using solar heat. The thermally regenerative fuel cell was devised which is composed of 2-propanol liquid-phase endothermic dehydrogenation at nearly 100degC, and acetone liquid- phase exothermic hydrogenation at nearly 30degC as reverse reaction. This low-temperature dehydrogenation can relatively easily utilize a flat solar heat concentrator. 2-propanol dehydrogenation generates acetone and hydrogen. Generated acetone generates electric power in hydrogenation, generating propanol. This propanol regenerates acetone and hydrogen in dehydrogenation. The activity of Ru and Pt composite catalyst was considerably higher than that of Ru or Pt single catalyst. The activity was also higher in carbon felt or carbon cloth carrier than carbon plate carrier. The open circuit voltage of the fuel cell was estimated to be 110-120mV, nearly consisting with theoretical values. Short circuit current was also estimated to be 9-11mA, suggesting reduction of its internal resistance as an important subject. 4 refs., 5 figs., 2 tabs.

  14. Analysis of the interaction between microorganisms and development of the mixed culture system; Biseibutsu kan sogosayo no kaiseki to kongo baiyo shisutemu no kaihatsu

    Taniguchi, Masayuki [Niigata University, Niigata (Japan)


    By mixed culture system using 2 kinds of microorganisms, example of experiment which produced useful compound was introduced. Lactobacillus bifidus and Propionibacteriaceae were cultured mixedly in order to get the preparation including the organic acid of which antibacterial activity is high. The lactic acid the lactose was once converted into acetic acid with the lactic acid in this mixed culture, and it had the high antibacterial activity further than got preparation with the culture of Lactobacillus bifidus independently more and more acetic acid propionic acid sequential transformation got. The new mixed culture system was developed in order to produce the ethanol from the mixture of xylose and glucose using Pichia stipitis Saccharomyces cerevisiae. By using this system, oxygen supply condition for being suitable for the yeast in each fermenter can be individually set, and again, it is culture solution 2 The interval of the fermentation kind of the mount was mutually able to be circulated. The ethanol could be produced in high yield and productivity in this mixed culture from the sugar mixture. Interaction and symbiosis between microorganisms are clarified, and by positively utilizing those results, it is necessary to develop the new and intelligent bioprocess which can demonstrate the function which will be similar to the mixed bacterial culture using the single microorganism in the future. (translated by NEDO)

  15. Study on detecting method of rail corrugation by using wavelet analysis; Wavelet kaiseki wo mochiita rail hajo mamo kenshutsu shuho ni kansuru kenkyu

    Suda, Y.; Okumura, M.; Komine, H.; Iwasa, T.; Terumichi, Y. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science; Qian, B. [The University of Tokyo, Tokyo (Japan)


    This paper reports the development of a method that detects the corrugation of a rail. A measurement test in which the track inspection car provided with an axle box accelerometer and irregular rail top face measurement equipment runs over the range of a specific section at the setting rate was conducted. A wavelet analysis is applied to the obtained acceleration data of vertical axle box vibration. The position of the generated corrugation was detected in a time base as the high position of a wavelet coefficient. Moreover, the dominant frequency range of corrugation was detected for each frequency by adding the wavelet coefficients in the whole position. This result was verified using the measurement data of an irregular rail top face. The wave height of corrugation can be estimated from the amplitude of the vertical vibration acceleration measured during low-speed traveling when the calculation result of a frequency response using the vertical vibration model in simplified wheel and rail systems is compared with the test result described above. 2 refs., 8 figs., 1 tab.

  16. Development of multi-frequency array induction logging (MAIL) tool. 3; Multi shuhasu array gata induction kenso tool (MAIL) no kaihatsu (genchi shiken data no ichijigen kaiseki). 3

    Sato, T.; Osato, K.; Takasugi, S. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Uchida, T. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)


    A field test was carried out in 1995 on a deep-seated geothermal investigation and reduction well WDR (in Kakkonda, Shizuku-ishi, Iwate Prefecture) by utilizing a multi-frequency array induction logging tool which is under development by NEDO. This paper reports results of analyzing the acquired data. With the WDR wells, an investigation has been conducted to a drilling depth of 330 m. Three frequencies in a range from 3 to 24 kHz provided relatively good data, but data with 42 kHz had poor quality that cannot be utilized for the analysis. Precise device calibration is difficult on data acquired from three array type vertical component magnetometers (the difficulty may be due to a signal line from a transmitter passing on the magnetometer side). Because of this difficulty, analysis using one-dimensional inversion program was performed by using ratio of the amplitude for each frequency and phase difference as input data. The analysis allowed to have derived a result that corresponds to the ground bed structure. 5 refs., 8 figs., 3 tabs.

  17. Evaluation stationariness of triaxial seismic while drilling and detection of reflected wave; Kosei kussaku ni tomonau danseiha no sanjiku kaiseki ni yoru hiteijo hyoka to hanshaha no kenshutsu

    Yoshida, T.; Asanuma, H.; Niitsuma, H. [Tohoku University, Sendai (Japan). Faculty of Engineering


    This paper reports a method to detect reflected wave components contained in an elastic wave caused in association with well drilling. Measurement was made on an elastic wave caused in association with well drilling in an experimental field by using a triaxial elastic wave detector disposed in a measurement well. Analyzing the particle motion tracks in the derived elastic wave signals (to derive the main axial direction of a three-dimensional hologram) revealed that oscillation direction of the signals changes non-steadily by time centering around the S-wave oscillation direction. In addition, a sound source position was estimated during the drilling. Existence probability of the S-wave signal in the non-steady continuous signals was estimated by handling the particle motion tracks stochastically. In addition, this existence probability was used as a weighting function for a correlative analysis to detect a reflected wave from directly reaching wave components in the non-steady continuous signals. Thus, improvement in reliability of reflected wave detection was attempted. Effectiveness of this method was endorsed by the field data. 3 refs., 7 figs.

  18. Flow characteristics of Hijiori HDR reservoir form circulation test in 1995; Koon tantai Hijiori jikkenjo ni okeru shinbu choryuso yobi junkan shiken (1995 nendo) kekka to ryudo kaiseki

    Fukushima, N.; Hyodo, M.; Shinohara, N.; Takasugi, S. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan)


    This paper reports the result of a preliminary circulation test conducted in fiscal 1995 on a deep reservoir (at a depth of about 2200 m) in the Hijiori hot dry rock experimental field. One water injection well and two production wells were drilled to constitute a circulation loop, to which the circulation test was performed to investigate the flow characteristics thereof. The result revealed the following matters: total amount of injected water of 51500 m{sup 3} resulted in a total fluid recovery rate of about 40%; as a result of well stimulation given twice during the initial stage of the water injection, the continuity impedance in the vicinity of the injection well decreased largely (however, the continuity improvement upon the second attempt was considerably inferior to that from the first attempt); and increase in the water injection amount does not necessarily lead to increase in the production amount. The paper describes additionally that it is extremely difficult to interpret non-linearity between the injection and production amounts by using a model prepared previously with a main objective to analyze the Hijiori HDR circulation system. 1 ref., 9 figs., 1 tab.

  19. Subsurface interpretation based on geophysical data set using geothermal database system `GEOBASE`; Chinetsu database system `GEOBASE` wo riyoshita Kakkonda chinetsu chiiki no chika kozo kaiseki

    Osato, K.; Sato, T.; Miura, Y.; Yamane, K. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Doi, N. [Japan Metals and Chemicals Co. Ltd., Tokyo (Japan); Uchida, T. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)


    This paper reports application of a geothermal database system (GEOBASE) to analyzing subsurface structure in the Kakkonda geothermal area. Registered into the GEOBASE to analyze specific resistance structure in this area were depth information (well track and electric logging of existing wells), three-dimensional discretization data (two-dimensional analysis cross section using the MT method and distribution of micro-earthquake epicenters), and two-dimensional discretization data (altitude, and depth to top of the Kakkonda granite). The GEOBASE is capable of three-dimensional interpolation and three-dimensional indication respectively on the three-dimensional discretization data and the depth information table. The paper presents a depth compiling plan drawing for 2000 m below sea level and an SE-NE cross section compiling cross sectional drawing. The paper also indicates that the three-dimensional interpolation function of the GEOBASE renders comparison of spatial data capable of being done freely and quickly, thereby exhibiting power in the comprehensive analysis of this kind. 3 refs., 8 figs., 2 tabs.

  20. Analysis of the pressure response of high angle multiple (HAM) fractures intersecting a welbore; Kokeisha multi fracture (HAM) kosei ni okeru atsuryoku oto kaiseki ni tsuite

    Ujo, S.; Osato, K. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arihara, N. [Waseda University, Tokyo (Japan); Schroeder, R.


    This paper reports pressure response analysis on wells piercing a high angle multi (HAM) fracture model. In this model which is defined on a three-dimensional space, a plurality of slanted fractures intersect with wells at high angles (however, intersection of fractures with each other is not considered). With respect to the pressure response analysis method using this model, the paper presents a basic differential equation on pressure drawdown and boundary conditions in the wells taking flows in the fractures pseudo-linear, as well as external boundary conditions in calculation regions (a reservoir spreads to an infinite distance, and its top and bottom are closed by non-water permeating beds). The paper also indicates that results of calculating a single vertical fracture model and a slanted fracture model by using a numerical computation program (MULFRAC) based on the above equations agree well respectively with the existing calculation results (calculations performed by Erlougher and Cinco et al). 5 refs., 6 figs.

  1. Flow characteristic of Hijiori HDR reservoir from circulation test in 1991; Koon tantai Hijiori jikkenjo ni okeru senbu choryuso shiken (1991 nendo) kekka to ryudo kaiseki

    Shiga, T.; Hyodo, M.; Shinohara, N.; Takasugi, S. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan)


    This paper reports one example of flow analyses on a circulation test carried out in fiscal 1991 at the Hijiori hot dry rock experimental field (Yamagata Prefecture). A fluid circulation model was proposed to simulate an HDR circulation system for a shallow reservoir (at a depth of about 1800 m) demonstrated in the circulation test by using an electric circuit network (which expresses continuity impedance in resistance and fluid storage in capacitance). Storage capacity of the reservoir was estimated by deriving time constant of the system from data of time-based change in reservoir pressure associated with transition phenomena during the circulation test. The storage capacity was estimated separately by dividing change of storage in the reservoir by change in the reservoir pressure. To derive the storage in the reservoir, a method to calculate non-recovered flows in the circulation test was utilized. The results of evaluating the reservoir capacity in the shallow reservoir using the above two independent methods were found substantially consistent. 3 refs., 6 figs., 1 tab.

  2. Seismic refraction analysis with high accuracy based on traveltime modeling; Basu keisan wo base to shita kussekiho jishin tansa kaiseki no koseidoka

    Saito, H.; Hayashi, K. [OYO Corp., Tokyo (Japan)


    For the purpose of enhancing the efficiency of analytical processes so that those not equipped with high skill may perform a certain level of analysis and that analysis precision may be improved, some analytical techniques based on path calculation were examined. As the result, a flow of work has become feasible, wherein an early model is constructed by use of a tomography-assisted analysis to be accomplished automatedly and the result is then converted into a layer system with the velocity and thickness to be automatically corrected for the determination of the ultimate velocity layer section. Following this flow of work, almost all the parts of the work may be accomplished automatically once the travel time curve is completed. Furthermore, the calculated travel time obtained by this method can be easily compared with the observed travel time creating an opportunity to show the high reliability of this method, for this to be accepted as a standard for evaluating the accuracy of exploration. It has also been found that this method may be applied to more complicated structures which fail to satisfy the conditions for a structure to be treated by other methods such as `Hagiwara`s method.` 3 refs., 5 figs.

  3. Development of the electromagnetic tomography system. Sensitivity study of anomalous body by model studies; EM tomography system no kaihatsu. Model kaiseki ni yoru ijotai no kando chosa kekka

    Kumekawa, Y.; Miura, Y.; Takasugi, S. [Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arai, E. [Metal Mining Agency of Japan, Tokyo (Japan)


    An examination was made by a model analysis on sensitivity and the like against a resistive anomalous body, in connection with an electromagnetic tomography system with surface earthquake sources and underground receiver arrangements. A resistivity model was of a three-dimensional structure, and built with a 5 ohm{center_dot}m low resistivity anomalous body assembled in a 100 ohm{center_dot}m homogeneous medium. As a result of the examination, it was shown that the size limitation of an analyzable anomalous body was 50{times}50{times}20m at a frequency of 8 to 10kHz and that a system with high precision in a high frequency range was necessary. The examination of effects under a shallow anomalous body revealed, for example, that the fluctuation of a low frequency response was large compared with a deep anomalous body and that, where a second anomalous body existed under it, the effect also appeared with a surface earthquake source positioned in the opposite side from the anomalous body. The examination of effects under the three dimensional structure revealed, for example, that a remarkable change appeared in the data with the change in the inclined angle of the transmission line against the strike of the anomalous body. 4 refs., 7 figs.

  4. Analyses of normal zone propagation properties of composite Nb{sub 3}Sn wire; Fukugo CuNb/Nb{sub 3}Sn senzai no joudendobu denpa tokusei kaiseki

    Seto, T.; Murakami, T.; Kaneko, T.; Murase, S.; Shimamoto, S. [Tohoku Univ., Miyagi (Japan). Graduate School of Engineering; Awaji, S.; Watanabe, K. [Tohoku Univ., Miyagi (Japan). Inst. for Materials Research


    We were 2 cooling systems between refrigerating machine cooling and dipping cooling of liquid helium, and the experiment on quench characteristics of the CuNb reinforcement stabilization Nb{sub 3}Sn wire rod was carried out. As the result, it was proven that the refrigerating machine cooling showed normal conduction division propagation characteristics unlike the dipping cooling. In this study, propagation characteristics in the refrigerating machine cooling are examined. In case of the refrigerating machine cooling, the absolute value of propagation velocity increased from experimental value at analytic value of about 20-30 times. This is because the heat quantity is mainly considered from the practice. Therefore, it is indicated that the heat quantity in the T{sub cs} vicinity is smaller than heat quantity of the full normal region. In the meantime, the qualitative tendency of the load factor dependence agreed almost. (NEDO)

  5. Numerical analysis of GM refrigerator considering the structural of regenerator and cooling stage; Chikureiki to reitoshitsu no kozo wo koryoshita GM reitoki no suchi kaiseki

    Ogiwara, D.; Kaizaki, T.; Takahashi, S.; Nakane, H. [Kogakuin Univ., Tokyo (Japan)


    It is the important element in which heat exchange efficiency in the regeneration vessel decides lowest end-point temperature in the refrigerating machine using the magnetism regeneration vessel. Then, we are under development of the numerical simulation for the purpose of searching the combination of magnetism regeneration material of which the heat exchange efficiency is good. It consisted in respect of temperature distribution and heat exchange efficiency in the regeneration vessel, until we have mainly carried out the calculation until now, and until in the unloaded condition, it reaches the 2K lowest end-point temperature. Here, it tries the simulation considering volume shift and changing discharge of the expansion space, which is related to thermal load, and it reports the result. (NEDO)

  6. Bayesian reliability analysis for non-periodic inspection with estimation of uncertain parameters; Bayesian shinraisei kaiseki wo tekiyoshita hiteiki kozo kensa ni kansuru kenkyu

    Itagaki, H. [Yokohama National University, Yokohama (Japan). Faculty of Engineering; Asada, H.; Ito, S. [National Aerospace Laboratory, Tokyo (Japan); Shinozuka, M.


    Risk assessed structural positions in a pressurized fuselage of a transport-type aircraft applied with damage tolerance design are taken up as the subject of discussion. A small number of data obtained from inspections on the positions was used to discuss the Bayesian reliability analysis that can estimate also a proper non-periodic inspection schedule, while estimating proper values for uncertain factors. As a result, time period of generating fatigue cracks was determined according to procedure of detailed visual inspections. The analysis method was found capable of estimating values that are thought reasonable and the proper inspection schedule using these values, in spite of placing the fatigue crack progress expression in a very simple form and estimating both factors as the uncertain factors. Thus, the present analysis method was verified of its effectiveness. This study has discussed at the same time the structural positions, modeling of fatigue cracks generated and develop in the positions, conditions for destruction, damage factors, and capability of the inspection from different viewpoints. This reliability analysis method is thought effective also on such other structures as offshore structures. 18 refs., 8 figs., 1 tab.

  7. Numerical response analysis of a large mat-type floating structure in regular waves; Matogata choogata futai kozobutsu no haro oto kaiseki

    Yasuzawa, Y.; Kagawa, K.; Kitabayashi, K. [Kyushu University, Fukuoka (Japan); Kawano, D. [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)


    The theory and formulation for the numerical response analysis of a large floating structure in regular waves were given. This paper also reports the comparison between the experiment in the Shipping Research Institute in the Minitry of Transport and the result calculated using numerical analytic codes in this study. The effect of the bending rigidity of a floating structure and the wave direction on the dynamic response of a structure was examined by numerical calculation. When the ratio of structure length and incident wavelength (L/{lambda}) is lower, the response amplitude on the transmission side becomes higher in a wave-based response. The hydrodynamic elasticity exerts a dominant influence when L/{lambda} becomes higher. For incident oblique waves, the maximum response does not necessarily appear on the incidence side. Moreover, the response distribution is also complicated. For example, the portion where any flexible amplitude hardly appears exists. A long structure response can be predicted from a short structure response to some degree. They differ in response properties when the ridigity based on the similarity rule largely differs, irrespective of the same L/{lambda}. For higher L/{lambda}, the wave response can be easily predicted when the diffrection force is replaced by the concentrated exciting force on the incidence side. 13 refs., 14 figs., 3 tabs.

  8. Analysis of anterior-posterior patterning of vertebrate central nervous system; Sekitsui dobutsu no chusu shinkei hassei no bunshi kiko no kaiseki

    Takeda, Hiroyuki [Nagoya University, Aichi (Japan). Graduate School of Science


    Analyses using amphibian embryos proposed that induction and anteroposterior patterning of the central nervous system is initiated by signals that are produced by the organizer and organizer-derived axial mesoderm. However, we show in the present study that the initial anteroposterior pattern of the zebrafish central nervous system depends on the differential competence of the epiblast, and is not imposed by organizer derived signals. This anteroposterior information is present throughout the epiblast in ectodermal cells that normally give rise both to neural and non-neural derivatives. Cell transplantation and RNA injection experiments showed that non-axial marginal mesoderm is a source of posteriorizing signals. Before and/or during neural side, loses the competence to express anterior neural markers under the influence of posteriorizing signals. This model is different from the classical amphibian two-signal model in that posteriorizing signals are secreted by non-axial mesoderm. (author)

  9. Analysis of vehicle surge. Relationship with the coefficient of variation in combustion of engine; Sharyo surge no kaiseki. Engine nensho hendoritsu tono kankei

    Nakamura, H. [Subaru Research Center Co. Ltd., Tokyo (Japan)


    Leaning of great magnitude and increase in EGR rate are being moved forward to reduce fuel consumption and improve exhaust gas emission, where variation in combustion is one of the important evaluation items. No studies can be found to date, which express the relationship between variation in combustion and vehicle surge as a specific numerical function including vehicle characteristics. Forward and rearward vehicle acceleration may be expressed by root mean square (RMS) of square mean of instantaneous acceleration. The Parseval`s theorem was used to convert the forward and rearward vehicle acceleration and time function of engine torque into a frequency function, and to perform an analysis in the frequency region. It was made clear that, when engine rotation speed is 1200 rpm or higher, or if there is no torque deviation between cylinders, vehicle surge can be expressed as the vehicle power characteristic value, the drivetrain characteristic value, the indicated mean effective pressure, the torque shape coefficient, the surge rate, and the product of the combustion variation coefficient. The drivetrain characteristic value could be said a dynamic total reduction gear ratio, and is a function of the drivetrain factors, which are largely affected especially by the mechanical loss factor of tires and suspension systems. 6 refs., 7 figs., 2 tabs.

  10. Technological development for super-high efficiency solar cells. Survey on the commercialization on analysis; Chokokoritsu taiyo denchi no gijutsu kaihatsu. Jitsuyoka kaiseki ni kansuru chosa kenkyu

    Tatsuta, M. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)


    This paper reports the survey results on analysis of super-high efficiency solar cells for practical use in fiscal 1994. (1) On the survey on crystalline compound solar cells, it was pointed out that the present study target is III-V compound semiconductor solar cell, and efficiencies of 36-39% are theoretically expected by use of two-junction cells. (2) On structure of super-high efficiency solar cells of 40%, selection of upper and lower cell materials for multi-junction cells, high-efficiency tandem Si solar cells, and the merit and possibility of light collection operation were surveyed, and their issues were discussed. (3) On physical properties of mixed crystalline semiconductors and characteristic evaluation of solar cells, impurities, trap center, minority carrier life, and applicability of supper lattice structure to high-efficiency solar cells were surveyed. (4) On fabrication technology of compound semiconductor solar cells, various problems of and approaches to electrode formation and antireflection film technologies, the meaning and issues of thin film substrate technology and continuous process, trial calculation of costs, safety, and resource problem were surveyed.

  11. Numerical modeling of historical change of volcanic heat sources: Numerical modeling of heat and mass transport up to 1000 degree C; Kazansei netsugen no keiji henka no shumyureshon kaiseki: 1000 degree C madeno netsu{center{underscore}dot}ryutai shumyureshon kaiseki

    Hanano, Mineyuki [JMC Geothermal Engineering Corp., Iwate (Japan)


    Temperature structure and its historical change around volcanos has been of interest for volcanology, geothermal development, etc. Magmatic intrusives have temperatures ranging from 700 to 850 degree C. Thus, there exists super-critical fluid around them. Numerical modeling of temperature changes around young volcanos and their heat sources thus requires treatment of the super-critical fluid. We describe one method for effective treatment of the super-critical fluid in the numerical modeling of porous media for the purpose of solving large-scale high-temperature problems of such phenomena. (author)

  12. Numerical method to calculate flow-induced vibration in turbulent flow. 3rd Report. Analysis of vortex-induced vibration in an array of elastically supported tubes; Ranryuba ni okeru ryutai kozotai rensei shindo kaiseki shuho no kaihatsu. 3. Kangun ni okeru uzu reiki shindo kaiseki

    Sadaoka, N.; Umegaki, K. [Hitachi, Ltd., Tokyo (Japan)


    A vortex-induced vibration of an array of elastically supported tubes is simulated in two-dimension by using a flow-induced vibration analysis program, which was developed in order to evaluate flow-induced vibration in various components such as heat exchangers. From a comparison of calculated results and experimental data, the following points are observed. (1) For the calculated results in a 5 {times} 5 square array, the flow pattern surrounding the first-row tubes is markedly different from that observed in the second-row or third-row tubes. This flow pattern is the same as that obtained from the experiment. (2) All tubes begin to oscillate due to unsteady fluid force and the oscillating mode is different for each row of tubes. These oscillation patterns show the same tendency in the experiments and it is concluded that the developed method can simulate vortex-induced vibration in an array of elastically supported tubes. 19 refs., 10 figs., 1 tab.

  13. Base isolation system for earthquake protection and vibration isolation of structures. Part 11. ; System identification of vibration model and earthquake response simulation analysis of base-isolated building. Tatemono no menshin boshin koho no kenkyu kaihatsu. 11. ; Shindo kaiseki model no dotei to jishin oto simulation kaiseki

    Koshida, H.; Ishida, M.; Yasaka, A.; Takenaka, Y.; Yamaya, H. (Kajima Construction Co. Ltd., Tokyo (Japan))


    Before the completion of the Toshin No.24 Omori Building (an earthquake protected building in Tokyo), a forced vibration test was performed to confirm the vibration characteristics and the rigidities of the laminated rubber bearing and the damper. Seismic observation was performed after the completion to confirm the effect of the earthquake protected building on decreasing acceleration response. A vibration analysis model built by identification method utilizing those data was used to carry out a simulation analysis of the earthquake on February 2, 1992 (5 seismic intensity in Tokyo) which recorded the largest ground motion acceleration since the observation was started in the building. Relative displacement of maximum 0.8cm was observed in the base-isolation layer at the time of the earthquake, and decrease in the natural frequency was also observed in the earthquake record. Reference, therefore, was made to the results of the past experiments to modify the rigidity of this portion only considering nonlinearity of the high damping rubber portion of the damper bearing. As a result, a simulated analytical result was obtained which agreed well with the observed values. 6 refs., 11 figs., 5 tabs.

  14. Analysis of air motion in a rotary valve. Measurement of static coefficient of discharge and numerical analysis of air motion for the columnar-notch type rotary valve; Rotary valve ni yoru kyunyu uki ryudo no kaiseki. Enchugata kirikaki shiki rotary valve no seiteki ryuryo keisu no sokutei oyobi kuki ryodo no kaiseki

    Muroki, T.; Moriyoshi, Y.; Suzuki, M. [Chiba University, Chiba (Japan). Faculty of Engineering


    Characteristic test and numerical analysis were performed of the prototype notch type rotary valve prepared as intake and exhaust valve for 4-cycle internal combustion engines. In experiment, a model cylinder and cylinder head were mounted on a surge tank, and the static coefficient of discharge was determined by measuring an intake flow rate and the differential pressure between an intake pipe and surge tank pipe while reducing static pressure in a surge tank to -20mmHg. As an experimental result, the static coefficient of discharge of the notch type rotary valve was dependent on opening shape of a valve air passage, and was higher in the second half of intake-stroke than the first one at the same minimum opening area. Prediction of the relation between an opening angle and flow rate was possible by numerical analysis of flow in the valve. The fact that the static coefficient of discharge of rotary valves is smaller than that of poppet valves at smaller opening area, seemed to be caused mainly by separation of air flow in the passage of rotary valves. 2 refs., 8 figs.

  15. Analysis of fractures along a borehole axis at a geothermal well. Preliminary study for interpretation of 3D stress field using logging data. Chinetsusei ni okeru koseijiku ni sou fracture no kaiseki. Kenso data wo riyoshita 3 jigen oryokuba kaiseki no yobiteki hyoka

    Okabe, T.; Shinohara, N.; Takasugi, S. (GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan)); Hayashi, K. (Tohoku University, Sendai (Japan). Institute of Fluid Science)


    Logging and analysis by BHTV and FMI were made in order to detect and evaluate the fracture before and after the hydraulic crushing of geothermal well. As a result of BHTV logging, the number of fractures detected increased before and after its hydraulic crushing. Though artificially generated, new open cracks were not confirmed at approximate depths of mud water leakage. That leakage which was generated by the hydraulic crushing was judged attributable to the opening of originally existing natural cracks. The FMI logging which electrically surveys the borehole wall can easily give information about the stratification planes. Many fractures were detected due to stratification planes which traveled west-northwestward with a southwestward dip of 20[degree] at the depth of 950 to 1100m. It was judged that some fractures leaking the mud water had largely depended upon the intrusive orientation of andesite and natural cracks during the hydraulic crushing, and lay on an intrusive boundary of andesite. The conclusion from the foregoing was that the evaluation of fracture, through logging by BHTV and FMI in advance, in the borehole is important for the hydraulic crushing. 3 refs., 7 figs.

  16. Investigation of compression wave propagating in slab track tunnel of high-speed railway. 1st Report. Field test and one-dimensional numerical analysis; Kosoku tetsudo no slab kido tunnel nai wo denpasuru asshukuha no kaiseki. 1. Genchi sokutei to ichijigen suchi kaiseki

    Fukuda, T.; Iida, M.; Maeda, T. [Railway Technical Research Institute, Tokyo (Japan); Maeno, K. [Chiba University, Chiba (Japan). Faculty of Engineering; Honma, H. [Chiba University, Chiba (Japan)


    An impulsive pressure wave which is called a `micro-pressure wave` or a `tunnel sonic boom` radiating from a tunnel exit is one of the important environmental problems in high-speed railways. The strength of the impulsive wave depends on the waveform of the compression wave at the tunnel exit. In this study, the distortion of the compression wave during its propagation through the tunnel is investigated by field measurement and numerical analysis. The field measurement is conducted in the concrete slab (ballastless) track tunnel of the Shinkansen. The numerical analysis is also carried out on one-dimensional compressible flow using upwind TVD scheme. It takes account of steady and unsteady wall friction and of heat transfer to the tunnel wall. Our original numerical analysis method is based on Galilei transformation of the coordinate system moving with the compression wave. The results show that the agreement of the numerical analysis and the field measurement is good. 12 refs., 11 figs.

  17. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation for extra-high efficiency solar cells (research on new concentrator modules); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Chokokoritsu taiyo denchi no gijutsu kaihatsu no tame no kaiseki hyoka (shingata shuko module)

    Tanimoto, J.; Sakuta, K.; Sawada, S.; Yaoita, A. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation of concentrator modules for extra-high efficiency solar cells. The outdoor exposure tests have been under way for 3 years for fluorescent plates, as part of the research program for development of materials and elementary techniques, and essentially no degradation has been observed by the perylene pigment test. Coupling of the fluorescent concentrator and solar cell units is investigated for the coupling position and method, to theoretically analyze geometrical coupling efficiency, where they are coupled at the bottom faces in consideration of easiness of module fabrication. It is demonstrated that a high coupling efficiency can be realized when the cell is sufficiently wide relative to thickness of the fluorescent plate. The coupling method is experimentally examined using transparent silicon gel. A prototype module having the same size as the commercial module (420mm by 960mm) is made on a trial basis, where a total of nine 20mm-thick cells are cut out of a single-crystalline silicon solar cell, 100mm by 100mm in size, and are connected to concentrators at the bottom faces. It shows 2.3 times increased output by the test using a large-area solar simulator. 2 figs.

  18. Analysis and evaluation for practical application of photovoltaic power generation system. Research and development of elemental technologies for thin-type solar cells; Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Usugata takessho taiyo denchi jitsuyoka no tame no kaiseki hyoka

    Sekikawa, T.; Shimokawa, R.; Yui, N.; Takato, H.; Takahashi, T.; Ishii, K.; Suzuki, E.; Nagai, K.; Kawanami, H.; Tanimoto, J.; Sakuta, H.; Iwata, Y.; Saito, N.; Koyama, K.; Sawada, S. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation for thin substrate polycrystalline solar cells. In order to analyze the structures of the grain boundaries in and interfaces with the cell substrate, and their effects on electrical activity, the photoluminescence (PL) measurement which enables spectroscopic analysis is applied to electromagnetically cast Si crystals. There are good correlations among PL luminous intensity, MBIC output and dislocation density for the grain boundary which contains many strains and serves as the dislocation source, because carriers in such a grain boundary easily disappear to reduce its luminous intensity at the band ends. Concrete scenarios for realizing thin-film silicon solar cells of high efficiency are presented, based on the analysis of the light-contained thin-film silicon solar cells of high output current, made in the previous year on a trial basis. An alumina substrate of high reflectivity is produced by the experiments of combining various devices. It is expected to realize high output current for the thin-film solar cells. 3 figs.

  19. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation for development of extra-high efficiency solar cells (fundamental research on extra-high efficiency Si solar cells); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Chokokoritsu taiyo denchi no gijutsu kaihatsu no tame no kaiseki hyoka (chokokoritsu silicon taiyo denchi gijutsu kaihatsu)

    Sekikawa, T.; Suzuki, E.; Ishikawa, K.; Takato, H.; Yui, N.; Shimokawa, R. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation for development of extra-high efficiency silicon solar cells. It is necessary for development of extra-high efficiency Si solar cells to extend as far as possible service life of minority carriers and to develop the evaluation techniques. Noting photoluminescence (PL) observable even with Si, the method of evaluating characteristics of minority carriers, which are not limited in samples, is developed to experimentally determine their service life from transitional response of the PL characteristics. Si has an extremely low quantum effect, because it is an indirect transitional semiconductor, and needs measurement of very high sensitivity. A rapid heat annealing apparatus and others to generate carriers in the infrared and ultraviolet regions are provided in consideration that these are possible means to increase efficiency. These possibilities will be pursued by developing the annealing techniques. 1 fig.

  20. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation of peripheral technology for photovoltaic power system (analysis and evaluation on photovoltaic systems); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Shuhen gijutsu kaihatsu no tame no kaiseki hyoka (taiyoko hatsuden system shingata chikudenchi)

    Kurokawa, K.; Endo, E.; Tsuda, I.; Nakamura, K.; Sugiyama, Y.; Nakazawa, S.; Takaku, K.; Yanagisawa, T.; Kojima, T.; Shimizu, K.; Koyanagi, T.; Onda, N.; Nozaki, K.; Negishi, A.; Kaneko, Y. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation of new storage batteries for photovoltaic power systems. Quantitative analysis and evaluation are made for introduction of intermittent operational mode in the conventional power supply system in which electrolyte units are connected in parallel and for improved performance by bubbles flowing into the line that supplies the electrolyte to the stack, in order to establish the configurations of and operational procedures for the redox flow batteries. The study on development of redox battery compares the Pb-Sn alloy felt collector with carbon fiber, Pb-Sb alloy felt and the lattice for the conventional lead acid battery, in order to optimize the new lead felt battery. As a result, it is found that the Pb-Sn alloy felt collector is better than any other device tested, because of its higher freedom with respect to electrode shape and battery size. The study on reliability evaluation of amorphous solar cells tests photoelectric conversion efficiency of a-Si solar cells, in order to elucidate the phenomena where degradation and rejuvenation compete with each other under weak light irradiation conditions. 8 figs., 1 tab.

  1. Quantitative evaluation of difference in impact of grounding accident on zero-phase voltage and zero-phase current in 6kV distribution system. Results of EMTP simulation; 6kV haiden keito deno chiraku jiko yoso no reiso den`atsu, reiso denryuha eno eikyo ni kansuru teiryoteki hyoka. EMTP (Electro Magnetic Transients Program) simulation kekka

    Nagai, K. [Kansai Electric Power Co. Inc., Osaka (Japan)


    EMTP (electromagnetic transients program) analysis using accident spot models is conducted to disclose the different effect exerted on the zero-phase voltage and zero-phase current by different grounding accidents. An accident spot producing a near-delta waveform is represented by an equivalent circuit model No. 1 in which a switch simulating a discharge gap and the accident spot resistance are connected in series. In the case of an accident presenting a near-needle waveform, since it is supposed that the discharge is caused to be intermittent because the gap discharge start voltage is high and the accident spot resistance is low, it is presented by an equivalent circuit similar in configuration to model No. 1 with the constants altered. A leak-suggesting waveform with a current flowing even in the neighborhood of the zero cross point is represented by model No. 1 with a leak resistor added in parallel thereto, which circuit is shown as model No. 2. In the accidents represented by model No. 1, zero-phase current waveforms are grouped into three types, and the relations between the switch on-off circuit/grounding resistance and waveform configuration are disclosed. As for the accidents represented by model No. 2, it is found that the leak resistance values fall somewhere in the 200-2000 ohm range. 2 refs., 6 figs., 2 tabs.

  2. Development of medium-sized medium-speed lean burn spark-ignited gas engines. Analyzing local gas composition within the main combustion chamber and optimizing the design factors of a jet hole in the pre-combustion chamber; Chugata chusoku kihakunensho gas engine no kaihatsu kenkyu. Nenshoshitsunai kyokusho gas sosei no bunseki to yonenshoshitsu funko sekkei yoso no saitekika ni kansuru ichikosatsu

    Goto, S.; Sakagami, T.; Hashimoto, T. [Niigata Engineering Co. Ltd., Tokyo (Japan)


    A high-speed gas sampling method was used to analyze the local gas composition within the main combustion chamber of a lean burn gas engine with a 260 mm bore. The spatial distribution of the gas composition and changes every crank angle were studied. The optimum design of a jet hole in the pre-combustion chamber was then investigated based on these results, with the aim of reducing CO and THC concentration and increasing the thermal efficiency. The engineering findings were evaluated by means of a performance test on a 6 cylinder engine. 4 refs., 10 figs., 1 tab.

  3. Development of technology for thin substrate polycrystalline solar cells for practical use. Development of elementary technologies for low-cost polycrystalline cell modules; Usugata takessho taiyo denchi seizo gijutsu no jitsuyoka kenkyu. Takessho cell module tei cost ka yoso gijutsu kaihatsu

    Tatsuta, M. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)


    This paper reports the study results on development of elementary technologies for low-cost polycrystalline cell modules in fiscal 1994. (1) On development of elementary technologies for mass production, fast surface machining, fast electrode forming and fast forming of junctions and antireflection films were studied. Surface machining by rotating grindstone was studied as fast cutting of fine grooves on Si substrates, resulting in possible fast machining superior in shape accuracy. Electrode properties equivalent or superior to previous ones were obtained by fast electrode forming using a fast printing/sintering equipment even at transfer speed 7.5 times as high as that of conventional methods. Simultaneous fast forming of junctions and antireflection films were achieved by heat treatment after deposition on Si substrate surfaces while heat-decomposing Ti and P compound gas. (2) On development of module structure, an optimum cell group angle, low reflection rate at glass surface, and fast wiring were studied. 5 figs., 2 tabs.

  4. Research and development of utilization technology of solar thermal system for industrial and other use. Research and development of key technology (energy conversion on technology using chemical reactions); Sangyoyo nado solar system jitsuyoka gijutsu kaihatsu. Yoso gijutsu no kenkyu (kagaku energy henkan gijutsu no kenkyu)

    Takita, M. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)


    Described herein are the results of the FY1994 research program for energy conversion technology using chemical reactions by the aid of solar energy. The demonstration runs were conducted by a bench-scale unit, which was operated stably for 100h, to produce promising results. The catalyst exhibits stable performance, without showing a sign of deactivation. It is found that the heat pump system works well, without being interfered with accumulated by-products. A heat of approximately 2,100kcal/h is recovered. It is confirmed that steam of 150{degree}C and 200{degree}C is generated from hot water of 80{degree}C and 95{degree}C, respectively. The bench-scale runs show a thermal efficiency of around 10%, which is lower than the target level. However, the runs with hydrogen-occluding alloy attain a process thermal efficiency of 30%. The system in which solar collector and chemical heat pump units are combined is evaluated with respect to its economic efficiency and operability for its eventual commercialization. 6 figs., 2 tabs.

  5. Clinical observation on treating 30 cases of asthenozoospermia%育根汤治疗少弱精症30例临床观察

    范凯; 肖友平; 黄从军; 孙智敏; 王衍冬


    目的:探讨育根汤治疗少弱精症临床疗效。方法:采用自拟育根汤(菟丝子、枸杞子、当归、黄芪、制何首乌、熟地黄、巴戟天、淫羊藿等)治疗弱精症30例。结果:痊愈6例,有效19倒,无效5例,有效率为83.3%。结论:育根汤具有益肾培育生精、增加精子数量、提高精子活力、活率之功效。%Objective: To investigate clinical effects of the Yugen decoction on asthenozoospermia. Methods: 30 cases of asthenozoospermia were received the Yugen decoction (Group parties: Tusizi, Gouqi, Danggui, Huangqi, Zhi Heshouwu, Shou Dihuang, Bajitian, Yinyanghuo, etc). Results: 6 cases were cured, 19 cases were effective, 5 cases were invalid, the efficiency was 83.3%. Conclusion:The Yugen decoction was good for kidneys, and effective on increasing sperm count, and improving sperm’s vitality and survival rate.

  6. Data acquisition and evaluation analysis on advanced high-efficiency energy system field test project (fiscal 2000); 2000 nendo sendoteki kokoritsu energy system field test jigyo ni okeru data shuyaku oyobi hyoka kaiseki



    Field tests have been performed on the next generation phosphoric acid fuel cell power generation systems to collect and analyze the long-term operation data and trouble cases by introducing the final proliferation pattern into the actual demand on a trial basis. This paper reports the achievements in fiscal 2000. The locations of executing the field tests in fiscal 2000 are the 15 sites, including the NTT Central Training Center, and the Environment and Energy Exploratirium. Measurements were carried out at each test site on fuel gas consumption, fuel cell output power amount, utilized quantity of heat at low temperatures, utilized quantity of heat at elevated temperatures, and discarded quantity of heat. In addition, the total demand power amount and the shutdown information were also put into order. As a result of the evaluation analysis, the second factory of Senhoku Manufactory recorded the longest operation time of 23,777 hours, whose operation factor has reached 92%. Five systems had the continuous operation time exceeded 5,000 hours. The power generation efficiency was about 40% in a system using the town gas 13A fuel, wherein the total efficiency was 90% or greater. The largest number of failures in fiscal 2000 was seven at Tochigi Factory of Kirin Brewery, whose average number of failure was 1.6 a year. (NEDO)

  7. Considerations on FEM modeling in analyzing buckling and plastic collapse of a detection control; Boto panel no zakutsu sosei hokai kaiseki ni okeru FEM model ka ni kansuru kosatsu

    Yao, T.; Fujikubo, M.; Yanagihara, D.; Irisawa, M. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering


    Buckling and plastic collapse of upper decks and bottom outer plates of a hull results directly in longitudinal bending collapse of the hull. Therefore, discussions were given on analysis for pressure destruction strength of a detection control panel which assumes an upper deck and a bottom outer plate. Pressure destruction behavior of the panting panel is a complex phenomenon accompanying non-linearity and geometrical non-linearity of the materials. Its whole phenomenon may be analyzed by using the finite element method (FEM) as a principle, but the analysis is not efficient. Therefore, considerations were given in relation to modeling when using the FEM. The considerations were given on a panel attached with flat steel panting members with respect to the modeling scope which considers the buckling mode according to the aspect ratio of the panel partitioned by the deflection control members. If the local buckling mode of the panel is an even number wave mode in the longitudinal direction, a triple span model is required. A modeling scope for a case of being subjected to water pressure and in-plane compression was considered on a panel attached with angle-type steel members having non-symmetric cross section. In this case, a triple bay model is more preferable to reproduce the behavior under water pressure loading. 1 ref., 6 figs.

  8. Characteristics of a Ti:sapphire laser pumped by a Nd:YAG laser and its analysis. Nd:YAG laser reiki Ti:sapphire laser no dosa tokusei to sono kaiseki

    Okada, T.; Masumoto, J.; Mizunami, T.; Maeda, M.; Muraoka, K. (Kyushu Univ., Fukuoka (Japan). Faculty of Engineering)


    Although Ti: Sapphire expects of a possibility of being a light source much superior to a dye laser having been used as a wavelength variable laser for spectral analyses, it has a limitation that it does not oscillate directly in the visible and ultraviolet regions. In order to develop a light source that is synchronizable over ultraviolet-near infrared regions, by means of combining a Ti: Sapphire laser of a high peak power, comprising an oscillator and a multistage amplifier, with a non-linear frequency conversion method for harmonic generation and Raman conversion, a prototype Ti:Sapphire laser that is excited by YAG laser second harmonic, and that synchronizes with a prism was fabricated, and its operational characteristics were investigated. As a result, an output energy of 35.6 mJ at a maximum was obtained at a wavelength of 773 nm against an excitation energy of 129 mJ, a conversion efficiency of 38.2% was obtained against the absorption energy of the crystals, and a continuous synchronism was achieved over 750 to 900 nm. 4 refs., 9 figs., 1 tab.

  9. Quantum analysis in the transition process to excited state of an oxygen molecule induced by electron collisions; Denshi shototsu ni tomonau sanso bunshi ni okeru reiki jotai sen`i no ryoshironteki kaiseki

    Ishimaru, K. [Gifu National College of Technology, Gifu (Japan); Okazaki, K. [Tokyo Inst. of Technology, Tokyo (Japan)


    For understanding of fundamental chemical reactions under a highly non equilibrium condition which is quite often used in plasma processing, the relevant atomic and molecular processes must be clarified. In this study, an analysis of the transition process to the excited state of an oxygen molecule induced by electron collisions in the oxygen plasma has been carried out. First, the electron density distribution in an oxygen molecule has been calculated using the extended Huckel molecular orbital method. Then, the electron potential energy distribution in the transition process to the excited state has been estimated. The electron behavior has been calculated using the estimated unidimensional electron potential energy distribution and unsteady quantum mechanics. As a result, the transition process to the excited state of an oxygen molecule induced by electron collisions and its conditions have been clarified qualitatively. 9 refs., 9 figs.

  10. Determination of electron impact ionization and excitation coefficients in He-Xe gas mixtures. He-Xe kongo gas ni okeru denshi shototsu denri keisu oyobi reiki keisu no sokutei to kaiseki

    Takahashi, K.; Tachibana, K. (Kyoto Inst. of Technology, Kyoto (Japan))


    The rare gas discharge gives a stable discharge and light emission characteristics at low temperature in comparison with the discharge of the vapor of such a metal as Hg. The present barrier for the commercialization of the color PDP lies in the lower level of its emission intensity and efficiency in comparison with that of CRT. In this report, an electron impact ionization coefficient in a gas mixture and an electron impact excitation coefficient for a XeIs {sub 4} level were analyzed using a Boltzmann equation by means of a steady state Townsend method using a drift tube. By comparing both, the elementary process in the gas mixture is investiagted to discuss the respective contributions for the effective ionization coefficient and the excitation coefficient. As a result, it was found that the ionization process in the He-Xe gas mixture could be described by the processes of direct ionization of Xe and He, and an indirect ionization (Penning effect) by an active helium. 37 refs., 12 figs.

  11. Planar contraction flow of diluted polymer solution. ; Experiment and numerical simulation considering inertia force. Kishaku kobunshi suiyoeki ni yoru kyu shukusho nagare. ; Kansei ko wo koryoshita suchi kaiseki to kashika jikken

    Kawabata, N.; Tachibana, M.; Yoshida, K. (Fukui Univ. (Japan). Faculty of Engineering); Fujita, K. (Fukui National College of Technology, Fukui (Japan)); Kimura, K. (Fukui Univ., Fukui (Japan). Graduate School)


    Studies on viscoelastic fluid flows have been carried out while focusing on cases of high viscosity fluid such as polymer solutions so as to meet industrial demand. In a viscoelastic fluid flow, inertia force, viscous force, and elastic force act on the flow field. As the velocity of the flow increases, the effects of the viscous force outgrow the others. The authors showed that stable calculations are possible even in a region where the inertia and elastic forces become important by applying Lax method to solving the constitutive equation. However, the Lax method has a drawback in that numerical viscosity is high. In this study, the CIP method is applied to solving the constitutive equation, and a comparison with respect to the two-dimensional planar contraction flow was made between the results from numerical calculation by means of this method and the results of visualizing experimentations using polymer solutions of relatively low concentration. As a result, it was confirmed by the visualizing experimentations that a flow pattern which is inherent in the viscoelastic fluid and which does not appear in the case of high viscosity fluid. Furthermore this characteristic pattern was also obtained by numerical calculations by this method. 9 refs., 10 figs.

  12. 2D inversion results and interpretation of CSAMT data in the Itaya prospect, Northern Honshu, Japan; Tohoku nanbu chiiki Itaya chiku ni okeru CSAMT ho nijigen kaiseki kekka to sono kaishaku

    Yoshioka, K.; Hishida, H.; Katayama, H. [Metal Mining Agency of Japan, Tokyo (Japan); Takakura, S. [Geological Survey of Japan, Tsukuba (Japan)


    A two-dimensional analysis was carried out on electric exploration data obtained by using the CSAMT method in the Itaya prospect in the southern part of the Tohoku region in Japan. Considerations were given on mine exploration targets. Gold produced in this area is contained in stockwork or vein deposited quartz in silicified hydrothermal breccia. Therefore, the exploration targets are silicified rocks that show high resistivity. The field investigation using the CSAMT method was conducted by installing a dipole source of about 1.9 km as a transmission source at a location about 6 km apart from the investigation area, and by measuring transmission currents from 8 to 10A and ten frequencies from 4 to 2048 Hz. The two-dimensional analysis was performed by using programs of a forward calculation that used a finite element method and of an inversion calculation that used a least-squares method. Analysis utilizing resistivity of the boring cores made minimizing RMS misfit possible. As a result, estimations were made on distribution of silicification and claying alteration from the detailed resistivity distribution around the Itaya mine. 5 ref., 8 figs.

  13. Improvement of life and NO{sub x} emission of radiant tube heating system by elastic-plastic creep analysis; Dansosei kuripu kaiseki ni yoru hosha dennetsukan kanetsu shisutemu no jumyo to NO{sub x} haishutsuryo no kaizen

    Nakagawa, Tsuguhiko; Nuta, Kunihiro [Kawasaki Steel Corp., Okayama, (Japan). Mizushima Warks


    The radiant tube heating system has been widely applied to the furnaces which require isolation of the heating atmosphere from the combustion atmosphere. However, the conventional system has a short life and it is difficult to reduce NO{sub x} emission when it is used at a high furnace temperature under high combustion load, because the fuel is burned in a small space. In order to solve this problem, we have studied the cause of radiant tube life depends on the uniformity of the temperature distribution along the radiant tube. We have developed a new burner using a two-stage combustion method with exhaust gas self-recirculation. As a result, the file of the new system has been increased by a factor of two or more, and NO{sub x} emission has been reduced by 20 % from previous levels. This paper presents an outline of the elastic-plastic creep analysis and the new burner, and describes the effect of its use on system life. (author)

  14. Analysis of the relationship between the coal properties and their liquefaction characteristics by using the coal data base; Tanshu data base ni yoru tanshitsu to ekika tokusei no kaiseki

    Kanbayashi, Y.; Okada, K. [Coal Mining Research Center, Tokyo (Japan)


    The relationship between coal properties and liquefaction or gasification characteristics was analyzed by using the analysis and test results and liquefaction characteristics in the coal data base. On liquefaction reaction, the close relation between an oil yield and coal constituent composition or a coal rank is well-known. Various multivariable regression analyses were conducted by using 6 factors as variables such as calorific value, volatile component, O/C and H/C atomic ratios, exinite+vitrinite content and vitrinite reflectance, and liquefaction characteristics as variate. On liquefaction characteristics, the oil yield of dehydrated and deashed coals, asphaltene yield, hydrogen consumption, produced water and gas quantities, and oil+asphaltene yield were predicted. The theoretical gasification efficiency of each specimen was calculated to evaluate the liquefaction reaction obtained. As a result, the oil yield increased with H/C atomic ratio, while the theoretical gasification efficiency increased with O/C atomic ratio. 5 figs., 1 tab.

  15. Solubilization of meso-carbon microbeads by potassium- or dibutylzinc-promoted butylation and structural analysis of the butylated products; Mesocarbon microbeads no butyl ka ni yoru kayoka to erareta butyl kabutsu no kozo kaiseki

    Murata, S.; Zhang, Y.; Kidena, K.; Nomura, M. [Osaka University, Osaka (Japan). Faculty of Engineering


    Tetrahydrofuran (THF) solubility and structure of the butylated products of meso-carbon microbeads (MCMB) were studied experimentally. In experiment, MCMB-A and MCMB-B obtained from two kinds of coal-tar pitch were used as specimens. MCMBs were butylated by BZ method using dibutylzinc-butyl iodide and KT method using K-butyl iodide-THF, and the butylated products were successfully obtained. The butylated products were investigated through THF solubility test, {sup 13}C-NMR measurement and gel permeation chromatography (GPC) measurement. As the experimental result, a BZ method produced the butylated products at a yield of nearly 170%, while a KT method produced them at a yield of nearly 130%. The THF solubility was estimated to be 89-97%. As the study result of molecular weight distributions by GPC measurement of solvent solubles, the molecular weight of raw material MCMB was estimated to be 590-770 in terms of polystyrene. 6 refs., 2 figs., 1 tab.

  16. Development of the EM tomography system. Part 2. Sensitivity studies of anomalous body by model studies; EM tomography system no kaihatsu. 2. Model kaiseki ni yoru ijotai no kando chosa kekka

    Kumekawa, Y.; Miura, Y.; Takasugi, S. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Arai, E. [Metal Mining Agency of Japan, Tokyo (Japan)


    A model analysis was used to investigate sensitivity of a two-dimensional structure on a resistivity anomalous body by using an electromagnetic tomography system. The resistivity model handled a three-dimensional structure. The model was prepared as a pseudo two-dimensional model in which a low resistivity anomalous body with 1 ohm-m was incorporated that has a basic length of 1000 m in the Y-direction in a homogenous medium having 100 ohm-m. As a result of the analysis, the following matters were elucidated: if a low resistivity anomalous body is present in a shallow subsurface, its impact starts appearing from lower frequencies than when the anomalous body exists only at a greater depth; if a high resistivity anomalous body exists, the detection sensitivity is lower than for the low resistivity anomalous body, but the analysis would be possible by using the phase because the phase has made a greater change; the source TxZ shows a change from lower frequencies than for the source TxX, and the amount of change is greater, hence the detection sensitivity on an anomalous body may be said higher with the source TxZ; however, for the anomalous body in shallow subsurface, the source TxX is more effective since it is not subjected to a too great impact at a greater depth. 5 refs., 7 figs.

  17. Fiscal 1999 achievement report on the analysis of the complete sequencing of full-length cDNA; 1999 nendo dai 2 ji hosei yosan kanzencho cDNA kozo kaiseki seika hokokusho



    This report accommodates the results of study conducted during the period of April 1, 2000, through March 31, 2001. The study began with the partial sequence determination for cDNA (complementary deoxyribonucleic acid) terminals presented by the cDNA library, novel clones were then selected out of them, and efforts proceeded to sequence all the bases therein. In this study, partial sequences were determined for 519,000 clones, and entire sequences for 7252 clones. The obtained sequence data were subjected to a homological analysis and then converted into an amino acid sequence, and then protein function prediction and the like were performed using the SOSUI program or the like. A prototype system to isolate novel clones out of partial sequences and a system for the graphic display of cDNA-genome links were fabricated. As for expression profile databases, the iAFLP (introduced amplified fragment length polymorphism) method was used to construct a high-throughput system and a function analysis database. (NEDO)

  18. Exciter system identification and automatic tuning of linear combination-type power system stabilizers Prony analysis; Prony kaiseki ni motozuku reijikei no dotei to hiritsu kasangata PSS no jido sekkei hoho

    Amano, M.; Watanabe, M.; Banjo, M. [Hitachi, Ltd., Tokyo (Japan)


    The objective of this paper is to present anew automatic tuning method of power system stabilizers using Prony analysis. Irony analysis is used for detecting oscillation frequency, damping, phase, and amplitude from power oscillation waveform data. By applying the method to the waveform data of stabilizing signal and internal induced voltage, exciter system phase lag and oscillation frequency can be identified, and control parameters are decided using the identified values. Linear combination-type power system stabilizers are effective for damping low frequency oscillations using two control input signals, generator power and bus voltage frequency. The control parameters can be directly derived from the oscillation frequency and the excitation system phase lag without using phase compensation. Simulation results show that the proposed method is effective both in one machine-infinite bus system and in a multimachine system. The method can be used for off-line controller design and also for on-line adaptive control. 9 refs., 15 figs., 4 tabs.

  19. Dynamic analysis of middle scale horizontal axis wind turbine. ; Comparison between results of computer simulation and field test. Chugata suiheijiku fusha no dotokusei kaiseki ni kansuru kenkyu. ; Computer simulation kekka to field jikken kekka no hikaku

    Shimizu, Y.; Kasahara, H.; Seki, K.; Furukubo, K. (Mie Univ., Mie, (Japan). Faculty of Engineering Tokai Univ., Tokyo, (Japan). Faculty of Engineering Suzuki Motor Co. Ltd., Shizuoka, (Japan))


    The dynamic characteristics of a middle scale horizontal axis wind turbine controlled by a computer were theoretically analyzed with a dynamic model, comparing with field test results. In experiments, the three-blades wind turbine was used of 7.5m in rotor height above ground, 8.2m in rotor diameter and 8kW in rated output, and the rotation force of the turbine was analyzed by a local circulation mehtod. After the characteristics were simulated using the measured data of rotor revolution, blade pitch angle and wind velocity as initial values, based on a real control program, blade pitch angle control variables were calculated from the simulated data of rotor revolution and generation current, to estimate the dynamic characteristics theoretically. As a result, the theoretical values of generation power, current, rotor revolution and blade pitch angle control agreed roughly with measured values, and both time-integrated total powers agreed fairly with each other, indicating a favorable applicability to power estimation. 6 refs., 11 figs., 1 tab.

  20. Improvement of vibration and noise by applying analysis technology. Development of active control technique of engine noise in a car cabin. Kaiseki gijutsu wo oyoshita shindo-soon no kaizen. Shashitsunai engine soon akutibu seigyo gijutsu no kaihatsu

    Uchida, H.; Nakao, N.; Butsuen, T. (Matsuda Motor Corp., Hiroshima (Japan). Technology Research Inst.)


    It is difficult to reduce engine noise which is principal noise in a car cabin without producing an adverse effect on low cost production. Active noise control technique (ANC) has been developed to reduce engine noise compatible with low cost production. This paper discusses its control algorithm and the system configuration and presents experimental results. The filtered-x least mean square method is a well-known ANC algorithm, however, it often requires large amount of calculation exceeding the present capacity of a digital signal processor. An effective ANC algorithm is developed by the use of the repetitiveness of the engine noise. This paper describes the basic theory of the control algorithm, the extension to a multiple input and output system, the system configuration and experimental results. A noise control system with three microphones is designed with consideration of the spatial distribution of the noise and reduces noise in the whole cabin by 8dB(A) in the largest case. Active noise control technique is applicable to many areas and can be used for the reduction of noise and vibration other than engine noise. 5 refs., 7 figs., 1 tab.

  1. Application of new analytical techniques to the order-disorder transformation in Ni-Mo alloys; Ni-Mo gokin no kisoku-fukisoku hentai ni okeru atarashii kozo kaiseki no kokoromi

    Oki, K.; Hata, S.; Kuwano, N. [Kyushu University, Fukuoka (Japan)


    This paper presents the analytical example of the ordering process of order-disorder transformation in Ni-Mo alloy using recent experimental techniques. Monte Carlo simulation clarified the fact that the ordering process in Ni4-Mo alloy is largely affected by short range interaction in the early stage of ordering, and forms D1a, D022 and Pt2Mo structure units with a similar atomic pair correlation. The ordering process is largely affected by long range interaction with an advance of ordering, and develops only D1a structure most stable in energy. In order to check the existence of SRO (short range order) structure obtained by Monte Carlo simulation, the analysis of high-resolution TEM images under SRO condition was carried out using the imaging plate recently developed for TEM. The analytical result showed that the observed N2M3 pattern is derived from not always the existence of N2M3 structure but superimposition of D1a, D022 and Pt2Mo structure units. 19 refs., 4 figs.

  2. Analysis of uniaxial behavior of an Fe-based shape memory alloy under cyclic thermomechanical loading; Netsu rikigakuteki kurikaeshi fuka no moto deno tetsuki keijo kioku gokin no tanjiku henkei/hentai kyodo kaiseki

    Nishimura, F.; Watanabe, N.; Tanaka, K. [Tokyo Metropolitan Institute of Technology, Tokyo (Japan)


    The thermomechanical hysteretic behavior of an Fe-based shape memory alloy is phenomenologically analyzed under cyclic uniaxial tensile and compressive loading. The shift of the stress-strain-temperature hysteresis loop, expressed by means of the evolution of the residual strain, is well explained by the theory with some internal variables. The accumulated perfect dislocations formed as a result of the interaction of martensite plates is one of the internal variables introduced here. The back stress is also employed as an internal variable to be the driving force for the shape recovery for the martensite plates. The simulations describe well the hysteretic behavior under the strain and stress-controlled cyclic thermomechanical loading; the shift of a loop, evolution of the residual strain and the change in transformation stress. 21 refs., 10 figs., 1 tab.

  3. X-ray photoelectron spectroscopy (XPS) study of fracture mechanism in sintered Si{sub 3}N{sub 4}; XPS ni yoru chiso keiso shoketsutai no hadan mekanizumu kaiseki

    Ozawa, M.; Furukawa, Y.; Ogawa, M.; Isozaki, K. [Denki Kagaku Kogyo Corp., Tokyo (Japan)


    The concentration of sintering aids, Y{sub 2}O{sub 3} and Al{sub 2}O{sub 3}, appearing on the fracture surface of sintered SI{sub 3}N{sub 4} on which either dynamic or cyclic stress is applied, was determined by X-ray Photoelectron Spectroscopy (XPS). The concentration ratio, (Y + Al)/Si, can be used as a correlational index that is useful to study the fracture behavior. According to our results, there is a direct correlation between larger (Y + Al)/Si concentration ratios on the fracture surface and the tendency of sintered SI{sub 3}N{sub 4} to suffer fracture by cyclic fatigue, namely, intercrystalline cracking is dominant when fracture by cyclic fatigue occurs. (author)

  4. Development of stereoselective analytical methods of chiral drugs and biological substances and application of hepatic local drug disposition; Yakubutsu oyobi biryo seiri kassei busshitsu no rittai sentakuteki bunri bunsekiho no kaihatsu to kanzo kyokusho dotai kaiseki eno oyo

    Nakagawa, T. [Kyoto University, Kyoto (Japan). Faculty of Engineering


    With an objective to elucidate the structure recognizing ability possessed by living organisms, discussions were given on methods to analyze the bonds between optically active drugs and polymers, and methods to analyze drug disposition fluid-dynamically. Studies have been advanced on the following themes, and the results were obtained therefrom: development of an on-line system to quantify non-protein bonding type concentrations in drugs utilizing the high-performance fraction analysis (HPFA, using a restricted movement type HPLC column) that had been already developed, establishment of a method to analyze hepatic local drug disposition by using the MULTI (drug disposition analyzing) program, and studies on stereoselectivity by using NMR generated by interactions of local anesthetics and lipids. The following findings were obtained: using the above on-line system, a discussion was given on protein bonds between BOF-4272 (xanthine oxidase inhibitor) and serum albumins, and the discussion was found effective in analyzing the stereoselectivity in drugs with strong protein bond; and with the above analytic method, optical behavior of ketoprofen (KP) in rat liver perfusion was discussed, wherein the transfer of KP into liver tissues was estimated to have been caused by involvement of active transportation rather than physical diffusion. 7 refs., 6 figs., 4 tabs.

  5. Study on diesel combustion with high-pressure fuel injection. Improvement of combustion and exhaust emissions using small-hole-diameter nozzles; Koatsu funsha diesel kikan no nensho kaiseki. Shofunkokei nozzle ni yoru nensho haiki kaizen koka

    Nakakita, K.; Kondo, T. [Toyota Central Research and Development Labs., Inc., Aichi (Japan); Watanabe, S. [Toyota Motor Corp., Aichi (Japan)


    This paper discusses the relationship between exhaust and combustion characteristics of small-hole-diameter nozzles in diesel engines and the reduction of the hole diameter. The combustion chambers used are of deep tray type and shallow tray type. The paper describes the result when using the deep tray chamber as follows: reduced hole diameter prolongs the injection period and reduces the average injection rate; amount of exhaust NOx depends only on injection pressures, but not on the hole diameters; this is because the combustion rate increasing effect as a result of the accelerated gas mixture forming and combustion due to the hole diameter reduction is offset by the combustion rate suppressing effect due to reduced average injection rate; the hole diameter reduction presents smoke reducing effect; with a large-diameter nozzle, the smoke increases in association with reduction in the injection pressure, but with the small-diameter nozzle, low smoke emission is maintained regardless of the injection pressures, and the NOx emission can be suppressed even with an injection pressure of 55 MPa. With the shallow tray type combustion chamber, the smoke increases as the injection pressure is decreased irrespective of the nozzle hole diameter sizes, indicating a correlation between the smoke amount and the injection period. A nozzle with small diameter hole of the deep tray type is more advantageous in reducing NOx and particulate emission. 10 refs., 14 figs., 1 tab.

  6. Study on the swirling flow field in a rotating cylinder. 2nd Report. Numerical analysis (2); Kaiten kannai ni okeru senkai nagareba ni kansuru kenkyu. 2. Suchi kaiseki (2)

    Kishibe, T. [Hitachi, Ltd, Tokyo (Japan); Kaji, S. [The University of Tokyo, Tokyo (Japan)


    In the 1st report, numerical results were presented for the swirling flow field in a rotating hollow turbine shaft. The existence of a rotating spiral vortex at the place where the swirling flow turns radially outward was shown. The first non-axisymmetric mode of a single spiral vortex was transformed into the second mode of a double spiral vortex at a specific rotating speed of the shaft. In this report, the downstream region of the computational domain is extended to the wheel space, the cavity between the corotating turbine disks, to solve the swirling flow field in the internal cooling air system of a gas turbine. The data on precessing frequencies of the rotating spiral vortex in this numerical analysis are compared with experimental results in a companion paper (3rd report). In addition, attention is paid to the three-dimensional swirling flow field in the rotating cavity with the rotating spiral vortex in the straight tube. (author)

  7. Three dimensional flow analysis in a radial turbine rotor. 2nd Report. Flow field near tip clearance and turbine efficiency; Radial turbine nai nagare no sanjigen suchi kaiseki. 2. Yokutan sukima kinbo no nagare to turbine koritsu ni tsuite

    Tsuchiya, N. [The University of Tokyo, Tokyo (Japan); Yoshiki, H. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science


    Three dimensional viscous flow analysis was performed in a radial turbine rotor. Tip clearance area was filled with another computational grid and multi-block analysis code was adopted. Clearance height was changed from 0 mm to 1 mm to investigate its influence to leakage flow and turbine efficiency. The results showed that flow field near tip clearance was mainly decided by relation between scraping flow and leakage jet. Leakage mass flow increased greatly at the latter half of rotor passage. Turbine efficiency tended to improve as tip clearance became small. Especially good improvement was found between 0.5 mm and 0.25 mm. It may be cause that scraping flow was dominant at the middle of rotor passage. (author)

  8. Numerical analysis for supersonic turbulent mixing layers of different species gases. lst report. ; Mixing characteristics of uniform flows. Choonsoku ishu gas ranryu kongoso no suchi kaiseki. 1. ; Ichiyoryu no kongo tokusei

    Nakano, S.; Ikegawa, M. (Hitachi Ltd., Tokyo (Japan))


    Flow field in which two supersonic turbulent flows with different species gases mix, was analyzed with a two-equation turbulence model and the mixing characteristics of 2 supersonic parallel flows were investigated by making the inlet flow condition of high speed gas constant and by ststematically changing the inlet flow condition of low speed gas. When mixing is carried out so that high speed gas is taken in the low speed gas, high spreading rate of the mixing layer is obtained and this tendency is emphasized markedly as the ratio such as velocity, density and pressure between low and high speed gases become small. The spreading of low mass ratio layer of low speed gas and that of low mass ratio layer of high speed gas are assymmetric and the spreading of the former is suppressed at the coindition where the latter expands. The tendency of developing rate of mixing layer to the correlating parameter in this calculation agreed well with results of visualized experiment. 14 refs., 10 figs., 3 tabs.

  9. Three-dimensional analysis of internal flow characteristics in the injection nozzle tip of direct-injection diesel engines; Sanjigen suchi kaiseki ni yoru DI diesel kikan no nenryo funsha nozzle nai ryudo tokusei no kaimei

    Ogawa, H.; Matsui, Y.; Kimura, S. [Nissan Motor Co. Ltd. Tokyo (Japan)


    To reduce the exhaust emissions and fuel consumption of direct-injection diesel engines, it is essential to optimize the fuel injection equipment closely related to combustion and emission characteristics. In this study, three-dimensional computation has been applied to investigate the effects of the injection nozzle specifications (e.g., sac volume, round shape at the inlet of the nozzle hole) and needle tip deviation on internal flow characteristics. The computational results revealed that the effects of the nozzle specifications and needle tip deviation with a smaller needle lift on internal flow characteristics and a general approach to optimize the injection nozzle specifications were obtained. 3 refs., 10 figs., 1 tab.

  10. FY 1998 achievement report on the R and D project on industrial science technology. Development of a functional biomolecule analysis/synthesis system; 1998 nendo kinosei seitai bunshi kaiseki gosei system no kaihatsu seika hokokusho



    For the purpose of developing the technology required for the biotechnology industry, a study was made on proteins having ligand recognition function, and the FY 1998 results were reported. In the technology development of a system for various/diversified syntheses of functional molecules, a system was designed/trially manufactured which enables the simultaneous synthesis of various biological/functional substances (compound library) at high-efficiency. In the development of the structure analysis system of ligand recognized proteins, a high-efficient biopolymer analysis system was developed which is based on TOF (time-of-flight) mass spectrometer and analyzes proteins produced by recombined genes quickly and precisely. In the R and D of functional molecules using ligand recognized proteins, the cloning was successfully made of the human estrogen receptor gene hER {alpha}, which is composed of 1,785 bp, from MCF-7-BOS. Further, the bioassay system for estrogen-like substances using MCF-7 cells was established. (NEDO)

  11. Overall analysis report on the fiscal 1994 geothermal development promotion survey. No.C-2. Wasabizawa area (secondary); 1994 nendo chinetsu kaihatsu sokushin chosa sogo kaiseki hokokusho. No.C-2. Wasabizawa chiiki (dainiji)



    The Wasabizawa area is located near the boundary between Yuzawa city south of Akita pref. and Ogachi-machi, Ogachi-gun, Akita pref, having a range of 3.0km northeast-southwest and 2.5km northwest-southeast of Wasabizawa almost as a center. The area for survey and its circumference are national forests, and the east and a part of the south of the area are designated as the Kurikoma quasi-national park third type special region. From the geochemical temperature distribution, it can be assumed that geothermal fluids of around 300{degree}C exist in the deep underground of the Kaminotai-Wasabizawa-Akinomiya area. From the distribution of density basements, the block structure of the basement can be estimated. Around the boundary of the ridge/sedimentation region of this density basement, fractures develop and the formation of reservoir structure is expected from the comparison with the result of the well survey. In the blowout test, obtained were 284.3{degree}C and 83.05 kgf/cm{sup 2} at a depth of 1,300m. In the geothermal system, it is assumed that reservoir structures of geothermal fluids develop in the deep underground of the central part of the area. The heat source to the geothermal system is supposed to be the magma reservoir remaining in Takamatsudake volcanic rocks. 110 refs., 177 figs., 105 tabs.

  12. Time domain electromagnetic method for petroleum exploration. Part 3. Case study in Yoneyama area; Sekiyu tansa ni okeru TDEM ho data shutoku to kaiseki ni tsuite. 3. Niigataken Yoneyama chiiki deno tekiyorei

    Ishikawa, H.; Mitsuhata, Y. [Japan National Oil Corp., Tokyo (Japan); Shiga, N. [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan)


    The result is reported of a TDEM method-based survey for oil exploration conducted in the Yoneyama district, Niigata Prefecture. The survey covered the southern part of the sedimentary basin in the prefecture, known for the poor quality of the seismic prospecting data that had been recorded. The purpose of the TDEM method-assisted survey was to probe the high-resistivity volcanic rock structure and low-resistivity sedimentary layer, and to know their details. The obtained data were subjected to interpretation by use of the 1D inversion method. A 4000m-deep level was subjected to interpretation, 34 data were inputted, and the early model consisted of 20 layers. As the result, it was found that there was a high-resistivity layer ranging from the ground surface down to a depth of approximately 500m, that a low-resistivity layer 2500-3000m in thickness lay thereunder, and that the lowest layer had a high resistivity of approximately 100 Ohm m. By comparing these data with the geological structure, structures were disclosed corresponding to the rock bed depth, Ukawa syncline, Ishiguro anticline, and Yoneyama mountain mass. 3 refs., 10 figs., 1 tab.

  13. Electrochemical impedance spectroscopy analysis on effect of steel fiber addition on corrosion of steel rod in mortar; Morutaruchu no tekkin no fushoku ni oyobosu suchiru fuaiba tenka no eikyo no denki kagaku inpidansu supekutorosukopi ni yoru kaiseki

    Sakashita, S.; Nakayama, T.; Hamasaki, Y.; Sugii, K. [Kobe Steel Ltd., Kobe (Japan); Sugimoto, K. [Tohoku University, Miyagi (Japan). Department of Metallurgy


    The effect of steel fiber (SF) addition to concrete on the corrosion behavior of steel reinforcement was studied by immersion corrosion tests in a 3 mass % NaCl solution for 363 day. The tests were conducted on steel rod/mortar specimens with different SF content (0-2 vol %), and corrosion potentials and electrochemical impedance of the specimens were measured during the tests. Corrosion potentials of the specimens were not so changed by the SF content. Electrochemical impedance measured at corrosion potentials was analyzed to get charge transfer resistance (R{sub ct}) using an equivalent electrical circuit with the R{sub ct}, Warburg impedance and a constant-phase element. The corrosion rate of steel rod in mortar estimated from the reciprocal of the R{sub ct} decreased with increasing of SF content in mortar, and correlated well with the rust area of steel rod measured after immersion corrosion tests. This shows that the electrochemical impedance measurement is the useful diagnosis method of corrosion of steel in concrete. The corrosion inhibition of steel rod in mortar by the SF addition was thought to be attributed to the consumption of dissolved oxygen by the corrosion of SF in mortar. (author)

  14. Evaluation and analysis of long-term operation data for a grid connected PV generation system; Nippon de hajimete no gyakuchoryu ari kojin jutaku taiyoko hatsuden system no choki unten jisseki no hyoka kaiseki

    Ishida, T.; Kozuma, S.; Hagihara, R.; Kishi, H.; Uchihashi, K.; Tsuda, S.; Nakano, S. [Sanyo Denki Co. Ltd., Tokyo (Japan)


    Long-term operation of a photovoltaic power generation system installed in a private residence in Osaka in 1992 is evaluated. Since the sale of power by back flow was approved five years ago, it has been working continuously without troubles. The evaluation covers the array output coefficient, inverter performance, system output coefficient, and power generation and sale track records. The findings obtained are mentioned below. Regular seasonal changes are observed in the array output coefficient, high in winter and low in summer, but the variation is smaller in amorphous arrays than in polycrystalline arrays. The monthly level of inverter performance is almost in all months higher than 0.90 specified for standard operation. The overall system output coefficient is 0.749, which is higher than the average value in NEDO`s field test business report. A total of 7852kWh has been generated since the system started operation five years ago, of which 3787kWh or 48% has been sold. 3 refs., 9 figs., 5 tabs.

  15. Characteristics of mixed culture where one type of microorganism assimilates the metabolite; Isshurui no biseibutsu ga seiseisuru taishabutsu wo betsuno shuruino biseibutsu ga shikashite zoshokusuru kongo baiyo no moderuka to tokusei kaiseki

    Toyama, M.; Matsunaka, T.; Shimizu, K. [Kyushu Inst. of Tech., Fukuoka (Japan). Dept. of Biochemical Engineering and Science


    Unstructure models were developed for a mixed culture where one microorganism assimilates the metabolite produced by another microorganism The model system was a mixed culture using Lactobacillus delbrueckii and Ralstonia erthroprop where the former assimilates glucose and produces lactic acid, and the latter assimilates lactate and produce poly {beta}-hydroxy butyrate (PHB). Performance improvement is shown for the mixed culture over a single culture for chemostat using the model developed. Since the optimal dissolved oxygen (DO) concentration is different for each microorganism, we developed another model which takes into account the effect of DO concentration on the dynamic behavior. Then the optimal DO concentration is obtained for chemostat. Moreover, we developed another model which takes into account NH{sub 3} concentration on the cell grown and PHB production by R. eutropha. Then the optimal time-profile for NH{sub 3} concentration is derived using the maximum principle. It is found that high Phba production could be attained even if NH{sub 3} concentration is not controlled if initial NH{sub 3} concentration is appropriately selected. (author)

  16. Time series analysis of the CO sub 2 exchange rate in the one-year-old leaves of laelia anceps lindl. Laelia anceps lindl no ichinen shiyo ni okeru CO sub 2 kokan sokudo no jikeiretsu kaiseki

    Dogane, Yuji; Ando, Toshio (Chiba Univ., Chiba, (Japan). Faculty of Horticulture)


    Concerning the carbon-fixing patterns in the dark reaction of plant photosynthesis, it has been known that there are 3 kinds, namely C {sub 3}, C {sub 4}, and CAM types, most of green plants fix CO {sub 2} by their C {sub 3} circuits and those with {C sub 4} and CAM circuits are rather small in number. However, CAM plants can switch from the CAM type to the C {sub 3} type or vice versa depending upon the external as well as internal factors and have capability of changing the balance between the two circuits, often making analysis of quantitative and qualitative changes of photosynthesis difficult, hence the analysis of photosynthesis rate of CAM plants dealt with in the studies which have so far been made has been limited to a quantitative grasp. This study used Laelia anceps Lindl. as sample material, classified several conditions whose photosynthesis rates differ recognizably and succeeded to analyze qualitative differences of these conditions by the mathematical measure. For analyzing photosynthesis rates, the time series analysis was newly adopted. 11 refs., 4 figs., 1 tab.

  17. Joint analysis of refraction seismic survey with multilevel hydrophone measurement (application for detecting the high velocity thin lid); Kussekiho jishin tansa data to kochu hydrophone data no fukugo kaiseki no rei

    Mori, S.; Harada, T.; Hayashi, K. [OYO Corp., Tokyo (Japan)


    During a refraction seismic survey conducted at a spot where a high-speed lava layer is supposedly concealed, the distribution of lava layer was estimated, and a composite analysis involving the vibration data received via hydrophones arranged in a bore hole was accomplished using a high-speed model based on an assumed geological section. The refraction survey centered on the bore hole and was accomplished using 250m-long traverse lines extending therefrom, one to the upstream and the other to the downstream of a river, producing a total length of 500m. The hydrophones were installed in the bore hole, and the measurement was carried out in an offset VSP-like observation pattern. In the analysis, the velocities obtained by the refraction survey and velocity logging were assigned to each layer on the basis of the assumed geological section for the construction of a velocity distribution model, which served as the early model for the repetition of calculation. Calculation was repeated with help of the said model, and a geological structure, capable of explaining the travel time data collected during the refraction survey and velocity logging, was successfully estimated. 1 ref., 5 figs.

  18. Time domain electromagnetic method for petroleum exploration. Part 3. Case study in Yoneyama area; Sekiyu tansa ni okeru TDEM ho data shutoku to kaiseki ni tsuite. 3. Niigataken Yoneyama chiiki deno tekiyorei

    Ishikawa, H.; Mitsuhata, Y. [Japan National Oil Corp., Tokyo (Japan); Shiga, N. [Mitsui Mineral Development Engineering Co. Ltd., Tokyo (Japan)


    The result is reported of a TDEM method-based survey for oil exploration conducted in the Yoneyama district, Niigata Prefecture. The survey covered the southern part of the sedimentary basin in the prefecture, known for the poor quality of the seismic prospecting data that had been recorded. The purpose of the TDEM method-assisted survey was to probe the high-resistivity volcanic rock structure and low-resistivity sedimentary layer, and to know their details. The obtained data were subjected to interpretation by use of the 1D inversion method. A 4000m-deep level was subjected to interpretation, 34 data were inputted, and the early model consisted of 20 layers. As the result, it was found that there was a high-resistivity layer ranging from the ground surface down to a depth of approximately 500m, that a low-resistivity layer 2500-3000m in thickness lay thereunder, and that the lowest layer had a high resistivity of approximately 100 Ohm m. By comparing these data with the geological structure, structures were disclosed corresponding to the rock bed depth, Ukawa syncline, Ishiguro anticline, and Yoneyama mountain mass. 3 refs., 10 figs., 1 tab.

  19. Estimation of network structure for signal propagations by the analysis of multichannel action potentials in cultured neural networks; Ta channel katsudo den`i kaiseki ni yoru baiyo shinkei kairomonai kofun denpa keiro no suitei

    Konno, N.; Fukami, T.; Shiina, T. [University of Tsukuba, Tsukuba (Japan); Jinbo, Y. [Nippon Telegraph and Telephone Corp., Tokyo (Japan)


    We have fabricated a 64 embedded microelectrode-array substrate using semiconductor technology to investigate the biological signal processing in brain by using cultured neural networks of fetal rat neocortex in vitro. We analyzed temporal and spatial neural networks patterns cultured on electrode-array substrate and attempted to examine the network structure constituted by neurons and the propagating patterns of electrical activity induced by the electric stimulus. In the experiments, each microelectrode size was 30 {mu}m squared and 150{mu} m spaced. For stimulation, one of the electrodes was selected and current pulses were applied through an isolated circuit. After the network was cultured in about 50 days, responses of neurons to electric stimulus were monitored extracellularly through 64-channel electrode array. Data recorded at each electrode consist of several spike trains generated by different cells. Therefore, these trains were separated by using wavelet transform and template matching for each electrode. We referred the temporal patterns of generated spikes for each electrode to as `spike sequences`. Next, we compared With the spike sequences among multichannel data and visualized the Cultured neural networks structure by identifying the directions of propagations and cell connections. 15 refs., 9 figs.

  20. Residual stress evaluation of coating films using welding residual stress and deformation analysis system. Yosetsu zanryu oryoku/henkei kaiseki system ni yoru coating himaku no zanryu oryoku hyoka

    Ito, Y.; Tanaka, K.; Takahashi, M.; Okada, T.; Saito, M. (Toshiba Corp., Tokyo (Japan)); Toyoda, M. (Osaka Univ., Osaka (Japan). Faculty of Engineering)


    With the objective that anybody having the basic knowledge on a simple welding technique can do easily welding residual stress and deformation analysis in an interactive mode, the welding residual stress and deformation analysis system (WRED) using a lap-top personal computer is being developed. In this report, an analytical study as well as an experimental study have been made on applicability of this system from the viewpoint of evaluating the residual stress chararcteristics of coating members in the WRED. In particular, the residual stress characteristics of ceramic coating films and those of graded coating members are described in detail. Part of the obtained results is as follows; as a result of the analysis by the WRED system of ceramic coating members processed each by the CVD method, the PVD method and the plasma flame coating method, only the CVD method and the plasma flame coating method have agreed well with the result of the residual stress measurement by the X-ray method. 12 refs., 8 figs., 2 tabs.

  1. Ultimate strength analysis of thin plated structures using eigen-functions. 3rd Report. Application to reliability analysis; Koyu kansu wo mochiita usuita kozobutsu no dansosei kaisekiho. 3. Shinraisei kaiseki eno oyo

    Ueda, Y. [Osaka University, Osaka (Japan). Welding Research Institute; Masaoka, K.; Okada, H. [University of Osaka Prefecture, Osaka (Japan). Faculty of Engineering


    A reliability analysis was performed on ultimate strength of a hull by introducing reliability engineerings into the idealized structural unit method. Elements developed under the present study were applied to a model of an actual structure to indicate that even an analysis requiring much time under the finite element method can be performed in a short time and at high accuracy when this method is used. Analysis acted with bending moment and shear force simultaneously was performed on a model used as a structure in experiments carried out by Nishihara, assuming pure bending moment and longitudinal strength during slamming. Then, a reliability analysis was conducted on the same model based on this analysis method to investigate the ultimate strength. In an analysis of an ultimate strength when bending and shearing that assume slamming act upon simultaneously, axial force in the hull side decreases as loading increases, wherein how the shearing force increases can be identified clearly. Although existence of initial bends reduces the strength, the effect of variance in the vicinity of the average value on the reliability is rather small, while the effect due to variance in yield stress is greater. 27 refs., 14 figs., 4 tabs.

  2. FY1992 research report on the evaluation and analysis of data collected in fuel cell power generation field test project; 1992 nendo nenryo denchi hatsuden field test jigyo ni okeru shushu data hyoka kaiseki kenkyu hokokusho



    This paper describes the achievements in fiscal 1992 in the field tests on fuel cell power generation systems. The three locations subjected to the present analysis are all installed with 50-kW systems, whereas power generation efficiency of around 35% such as 35.3, 34.2 and 34.6% was obtained when the systems were operated at the rated output. When the load gets to below a certain load band (about 30 kW), the power generation efficiency decreases proportionately with the load. The overall efficiency including heat supply was 77.8, 70.7 and 80.3% respectively at about the rated output, showing a trend that the higher the thermal efficiency, the higher the overall efficiency. The case of generating both electric power and heat simultaneously has higher efficiency than the case of heat supply alone. The contribution rate of the fuel cell as a base load was 2.8, 4.6 and 13.6%, respectively. The system with as high value as 13.6% takes a power load following type operation mode, in which power is generated during a time band with large load during weekdays, and no power is generated at nighttime and in holidays when load is smaller, playing a role of peak responding power supply. Only one trouble has occurred in an auxiliary generator in the heat recovery system. (NEDO)

  3. Study on the swirling flow field in a rotating cylinder. 1st Report. Numerical analysis-1; Kaiten kannai ni okeru senkai nagareba ni kansuru kenkyu. 1. suchi kaiseki-1

    Kishibe, T. [Hitachi, Ltd., Tokyo (Japan); Kaji, S. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering


    The swirling flow field including non-axisymmetric phenomena in a rotating hollow turbine shaft is solved using computational fluid dynamics. The three-dimensional compressible Navier-Stokes equations are adopted and discretized by an implicit TVD scheme. No axisymmetric assumption is applied in order to find non-axisymmetric phenomena. The computational domain, therefore, is extended circumferentially to 360 degree and axisymmetric boundary conditions along the center axis are avoided. The existence of a rotating spiral vortex at the place where the swirling flow turns radially outward is shown. The spiral vortex rotates about the shaft center axis in the same direction as the circumferential velocity of the main flow. Conversely, the vortex has a spiral form opposite to the rotational direction of the fluid. The first non-axisymmetric mode of a single spiral vortex is transformed into the second mode of a double spiral vortex at a specific rotating speed of the shaft. (author)

  4. Fiscal 1999 geothermal energy development promotion survey. Report on survey of structural boring (No. B-7 Kuwanosawa area); 1999 nendo chinetsu kaihatsu sokushin chosa. Kozo shisui chosa koji oyobi kaiseki hokokusho (No.B-7 Kuwanosawa chiiki)



    Borehole N11-KN-1 was digged and investigated for clarifying the geothermal structure of the Kuwanosawa area, with attention fully paid to the existing survey results. The hole is inclined, 1,802.30m deep in total, with a casing pipe installed down to the 1,101.76m level. Temperature was measured and electrical logging was performed at levels 410m, 1,110m, and 1,802.23m while the hole walls were still exposed bear. The maximum temperature of 161 degrees C was observed at the hole bottom, and the product of permeability - layer thickness transmission coefficient was described by 3.72 to 4.75 times 10{sup -1} darcy.m. The geothermal structures in presence in the south-western part of the survey area and along the Wasabizawa fault were made clear, and it was found that there exists no high-temperature water system in the vicinity of borehole N11-NK-1. As tasks for the future, it was proposed that a geothermal survey of the south-eastern part which includes borehole N57-YO-2 and a geochemical survey of fluids including hot spring water and surface be conducted. (NEDO)

  5. Borehole geophysics for delineating the geological structure in the Sakonishi prospect, the Hida area, Japan; Hida chiiki Sako nishi chiku ni okeru boring ko riyo butsuri tansa ni yoru chishitsu kozo kaiseki

    Katayama, H.; Hishida, H.; Yoshioka, K. [Metal Mining Agency of Japan, Tokyo (Japan)


    In order to discuss effectiveness of physical exploration in the Sakonishi prospect in the Hida area, physical exploration was carried out by utilizing bored wells. This area contains the Kamioka mine, one of the major base metal mines in Japan, where electrical exploration has been attempted several times in the past. No effective results have been obtained, however, because specific resistance contrast between mine beds and base rocks is too small, and the topography is too steep making site workability inferior. As part of the investigations on geological structures over wide areas, electrical logging (specific resistance and natural potential) was performed in fiscal 1995 and 1996 by utilizing the boreholes. Induced polarization logging was also conducted on the same boreholes. A traverse line on the ground with a length of 600 m and boreholes were used to execute specific resistance tomography. Clear extraction was possible on a fault structure which is thought related with limestone distribution and mine bed creation. However, it was not possible to identify upward continuity of zinc ores expected in the exploration. Because of not large a specific resistance contrast between zinc ores and base rocks, it is difficult to find mine bed locations only from the information on the specific resistance. 5 refs., 5 figs., 1 tab.

  6. Numerical analysis of stress and displacement in subsurface layer of work roll for hot rolling by interconnecting stress and thermal loads; Oryoku netsufuka rensei ni yoru netsuen work roll hyosobu no oryoku hen`i no suchi kaiseki

    Yamamoto, H.; Uchida, S.; Inoue, T.; Araya, S.; Nakajima, K. [Nippon Steel Corp., Tokyo (Japan)


    An analysis model was developed to calculate the stress, strain, and residual stress occurring in the work roll (WR) surface layer for hot rolling by the stress and thermal loads. The numerical analysis model for surface layer stress and the numerical analysis model for WR surface layer temperature were interconnected for calculation under thermal elastic-plastic and isotropic hardening conditions using the same numerical analysis method as in Merwin. If the elastic-plastic strain in the surface layer approximates to one obtained on the assumption of an elastic body, this model can be used satisfactorily. If the heating and cooling in the WR surface layer is in the steady state, the numerical analysis model for surface layer temperature can be applied. Under calculation conditions of this time`s hot rolling, the stress in the WR surface layer is larger on the intermediate roll (IMR) side than on the rolled material side toward the compression (negative) side. The residual stress on the WR surface increases as the friction factor between WR and IMR increases. The residual stress in the slightly inner position of the surface decreases, and the residual displacement on the surface increases. 12 refs., 6 figs., 3 tabs.

  7. Numerical analysis of stress intensity factors of crack in subsurface layer of work roll for rolling; Atsuen work roll no hyoso kiretsu ni okeru oryoku kakudai keisu no suchi kaiseki

    Yamamoto, H.; Uchida, S.; Hashimoto, M. [Nippon Steel Corp., Tokyo (Japan)


    For work roll for hot rolling, defects such as cracks are formed in subsurface layer by repeated stress load and thermal load. A simplified model for stress intensity factors of mixed modes was derived by considering non-dimensional stress intensity factors obtained by Murakami et al. A numerical analysis model for stress intensity factors of mixed modes in the subsurface layer was obtained by applying this simplified model to the deformation analysis model for the thermal elastic-plastic stress and strain with stress and thermal loads. It was found that the simplified numerical analysis model of stress intensity factors derived in this study can be practically applied. Tensile mode crack propagation did not occur due to the negative value of tensile mode stress intensity factors on the side of rolling material. It was found that the stress intensity factors of tensile and shear modes on the side of intermediate roll is larger than those on the side of rolling material, and that the crack propagation is estimated to occur on the side of intermediate roll. When the stress intensity factors of tensile mode was the same as those of shear mode, the crack propagation was estimated to occur on the side of shear mode. The initial vertical crack of shear mode propagated in the inverse direction against the rolling direction, and change its direction gradually into the parallel direction to the surface. 10 refs., 12 figs., 1 tab.

  8. Development of technology for thin substrate polycrystalline solar cells for practical use. Survey on analysis for practical use; Usugata takessho taiyo denchi seizo gijutsu no jitsuyoka kenkyu. Jitsuyoka kaiseki ni kansuru chosa kenkyu

    Tatsuta, M. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)


    This paper reports the survey results on the manufacturing technology trend of thin substrate solar cells for practical use in fiscal 1994. In production of Si raw material, as electron beam melting and ingot production are combined, C, P, Ca and Al are removed by evaporation, while Fe and Ti by solidifying segregation. As the basic technology of continuous casting for substrate production, a drop coagulation method for Si melt is under investigation which is more advantageous in unidirectional solidification and cell conversion efficiency than conventional methods. The cost and future of single crystal Si and polycrystal Si were compared on the basis of document survey. Every institute commonly uses FZ substrates to produce single crystal Si cells, and SiO2 for surface passivation. New cell structure, hetero-structure, thin cell, crystalline defect and lifetime are under investigation for ultrahigh-efficiency solar cells. The technology trend was also surveyed through academic societies and conferences. 5 tabs.

  9. Research on fabrication technology for thin film solar cells for practical use. Survey on the commercialization analysis; Usumaku taiyo denchi seizo gijutsu no jitsuyoka kenkyu. Jitsuyoka kaiseki ni kansuru chosa kenkyu

    Tatsuta, M. [New Energy and Industrial Technology Development Organization, Tokyo (Japan)


    This paper reports the survey results on the technological trend, safety and latest technologies of thin film solar cells in fiscal 1994. As the fabrication technology for amorphous film solar cells, three-electrode plasma CVD was surveyed as fabrication method for high-mobility materials, and hydrogen radical CVD as fabrication method for high-photostable films. Current foreign and domestic reliability tests were surveyed for reliability evaluation of solar cells. In order to ascertain the performance, efficiency, physical properties and optimum structure of polycrystalline Si thin film solar cells, previously reported test results on physical properties such as carrier concentration, carrier lifetime and mobility of films were surveyed together with device simulation results. In addition, technologies for high-efficiency CuInSe2 system and CdTe system solar cells, technologies for cost reduction and mass production, and environmental influence were surveyed. Estimation of production costs for cell modules, and safety of thin film solar cells were also surveyed.

  10. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation for development of extra-high efficiency solar cells (fundamental research on extra-high efficiency III-V compound semiconductor tandem solar cells); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Chokokoritsu taiyo denchi no gijutsu kaihatsu no tame no kaiseki hyoka (chokokoritsu III-V zoku kagobutsu taiyo denchi gijutsu kaihatsu)

    Sekikawa, T.; Kawanami, H.; Sakata, I.; Nagai, K.; Matsumoto, K.; Miki, K. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for development of extra-high efficiency III-V compound semiconductor tandem solar cells. Heteroepitaxial structures of compound semiconductors, such as GaAs, on silicon substrates are analyzed and evaluated by EXAFS, Raman and RHEED for the initial stage of the film growth and heterointerfaces. The device capable of in-situ observation of the growing surface structures during the period of heteroepitaxial film growth is introduced, to investigate the effects of rise-up and initial growth conditions on defects. The effects of atomic hydrogen on growth of a GaAs film on a silicon substrate are investigated from photoluminescence and solar cell characteristics, to confirm the effects of reducing defects. Heteroepitaxial growth of InGaP, which has the optimum band width for forming multi-junction silicon solar cells, on a silicon substrate is investigated, to find that an interfacial buffer layer is necessary to form a good film. 2 figs.

  11. Analysis and evaluation for practical application of photovoltaic power generation system. Analysis and evaluation for thin substrate polycrystalline solar cells (alloy-base amorphous materials, PIN layers, strains in the interface, and effects of impurities); Taiyoko hatsuden system jitsuyoka no tame no kaiseki hyoka. Usumaku taiyo denchi jitsuyoka no tame no kaiseki hyoka (gokinkei amorphous zairyo pin kakuso kaimen ni okeru yugami fujunbutsu nado no eikyo)

    Matsuda, A.; Oeda, H.; Yamasaki, S.; Hata, N.; Kondo, M.; Toshima, Y.; Sakata, I.; Ganguly, G.; Suzuki, A.; Kamei, T.; Okushi, H.; Nonaka, H.; Oda, N.; Katagiri, H.; Ichimura, N.; Kokubu, K.; Nakamura, K.; Sekikawa, T.; Yamanaka, M. [Electrotechnical Laboratory, Tsukuba (Japan)


    Described herein are the results of the FY1994 research program for analysis and evaluation for thin film solar cells. The study on quantitative analysis of hydrogen atoms in a plasma determines quantity of hydrogen atoms in the plasma of monosilane diluted with hydrogen. It is found, contrary to expectation, that quantity of hydrogen atoms in the plasma decreases as it is more diluted with hydrogen. The study on light-induced degradation of the thin chlorine-base amorphous silicon films confirms that the plasma CVD method with 20% of dichlorosilane gas added to monosilane gas produces the thin amorphous silicon film 3 times faster than the conventional method. The thin film has essentially the same defect density as the one prepared by the conventional method, showing good photoelectric characteristics. The thin film of chlorinated amorphous silicon has a 1 digit lower defect density than the conventional one of amorphous silicon, as revealed by the accelerated degradation test with irradiated laser light and the constant current method to determine saturated defect density. 3 figs.

  12. [Toxicity of isolates of Bacillus thuringiensis from Wroclaw against larvae of Aedes aegypti].

    Lonc, E; Kucińska, J; Rydzanicz, K


    Seven field isolates of Bacillus thuringiensis from the Lower Silesia, region of Poland, the Osola plain and phylloplane niches and soil samples from the Karkonosze National Park were tested in vitro for insecticidal activity against mosquito larvae Aedes aegypti. Both the spore/crystal mixture and pured crystals from B. thuringienis strains KpC1, KpF3 and OpQ3 (belonging to the first physiological group including the subspecies japonensis, yoso, jinghongiensis ) proved to be the most active against insects (61-65% of corrected mortality). The lowest toxicity (7-28% mortality) was caused by B. thuringiensis wratislaviensis strains (PO12 and 13).

  13. Measurement of physical property values of molten semiconductor in microgravity environments and analysis of heat flow in silicon crystal growing furnace; Bisho juryoku kankyoka ni okeru handotai yueki no busseichi sokutei oyobi silicon kessho seicho ronai netsu ryudo kaiseki no kenkyu

    Imaishi, Y. [Kyushu University, Fukuoka (Japan). Institute of Advanced Material Study; Tsukada, T. [Tohoku University, Sendai (Japan). The Institute for Chemical Reaction Science; Kitagawa, S.


    Simulation is conducted, covering a range from microscopic atom scale phenomena to a Cz furnace as a whole, for the analysis of high-quality silicon crystal growing Cz furnaces and for the evaluation of the degree of soundness represented by measured physical property values. Physical property value measuring experiments are being conducted in microgravity environments using the JAMIC (Japan Micro Gravity Center) free-fall tower, etc., and part of the results achieved so far is reported. In an `analysis of behavior of droplets afloat in an electromagnetic field,` electromagnetic levitation furnace coils and molten silicon drops are modelled, and the effect of gravitational acceleration on the drop shape and on the gravity center displacement upon application of a high-frequency current to the levitation coils is examined. In a `study of organization of comprehensive analysis codes for Cz furnace,` analysis programs for all the factors, a heat conduction analysis code, and a heat radiation code have been completed. In a `microsimulation,` studies of crystals and phenomena in molten semiconductor on the atomic scale are discussed. 6 figs.

  14. FY 1997 R/D project of industrial and scientific technologies contracted with NEDO. Report on technology development of utilization of biological resources such as bioconsortia (development of analytical techniques of bioconsortia); 1997 nendo sangyo gijutsu kenkyu kaihatsu jigyo Shin energy Sangyo Gijutsu Sogo Kaihatsu Kiko itaku. Fukugo seibutsukei nado seibutsu shigen riyo gijutsu kaihatsu (fukugo seibutsukei kaiseki gijutsu no kaihatsu) seika hokokusho



    Bioconsortia are microbial composites composing of more than two kinds of microorganisms with special functions. To utilize their advanced functions, some techniques have been developed for analyzing their functions and interactions, and for identification, separation and incubation of the constituent microbial groups. In FY 1997, an investigation was made on technology trends, domestic researchers, and research topics related to bioconsortia. To manage and promote the progress of research at the National Institute of Bioscience and Human-Technology where the centralized management of this project is conducted, meetings are held once a month to examine the progress at the institute, in which reports are made and discussions are held on how each research item is progressing. In addition, meetings of the committee to promote research are held every other month to consider and examine measures required for promoting the research. Re-entrustment of research has been made on two subjects, i.e., `Studies on biological significance of symbiotic microorganisms` by Prof. Ishikawa of the University of Tokyo, and `Study on the relationship between the biosynthesis of useful terpenic materials of plant origin and the differentiation of plant tissues, and their effective production by plant cell cultures` by Prof. Inoue of Gifu Pharmaceutical University. 27 refs., 13 figs., 1 tab.

  15. FY 1998 evaluation/analysis by site of the data collected in the field test project for photovoltaic power generation for public facilities. 2/4; 1998 nendo kokyo shisetsu nadoyo taiyoko hatsuden field test jigyo ni okeru shushu data hyoka kaiseki kaku site betsu 2/4



    The data collected monthly in the FY 1998 photovoltaic power generation field test project for public facilities were evaluated/analyzed by site. The data items are the flux of global solar radiation/global radiation on an inclined surface/effective global radiation on an inclined surface (each: kWh/m{sup 2}), mean temperature, and array electric energy/system consumption power/load electric energy/system supply load/back flow electric energy (each: kWh). Others are times of linkage protection movement, linkage disconnection time (min), system operation time (min), independent supply load (kWh), equivalent array/equivalent system operation time, array/system output coefficient, system utilization rate/power generation efficiency, INV effective efficiency, and INV load factor. The sites for survey are school (junior and senior high school/elementary school/kindergarten/nursery), lifelong education facilities (technical training center/forestry study center), government office (government office building), environmental public facilities (water purification plant/disaster-prevention center/park), welfare facilities (special nursing care center for the elderly), public facilities (community center/martial arts center), cultural facilities, factory in area, etc. (NEDO)

  16. Study on the annular leakage-flow-induced vibrations. 2nd Report. Stability analysis and experiments for translationally and rotationally coupled two-degree-of-freedom systems; Kanjo sukimaryu reiki shindo ni kansuru kenkyu. 2. heishin kaiten 2 jiyudo renseikei no anteisei kaiseki oyobi jikken

    Li, D.W. [Hitachi, Ltd., Tokyo (Japan); Kaneko, S. [The University of Tokyo, Tokyo (Japan); Hayama, S. [Toyama Prefectural University, Toyama (Japan)


    In this study, the stability of annular leakage-flow-induced vibrations was investigated theoretically and experimentally for a translationally and rotationally coupled two-degree-of-freedom system. The critical flow rate was both theoretically and experimentally obtained as a function of the passage increment ratio and the eccentricity of the passage. A good agreement between the theoretical and experimental results was obtained. It was discovered both theoretically and from the experiments that instability will occur in the case of a divergent passage: the eccentricity of the passage lowers the stability of the systems. (author)

  17. Boltzmann equation analysis of electrons swarm parameters and properties of excited particle number densities in Xe/Ne plasmas. Laser absorption effect; Xe/Ne plasma chudenshi yuso keisu narabi ni reiki ryushisu mitsudo tokusei no Boltzmann hoteishiki kaiseki. Laser ko kyushu koka

    Uchida, S.; Sugawara, H.; Ventzek, P.; Sakai, Y. [Hokkaido University, Sapporo (Japan)


    Xe/Ne plasmas are important for plasma display panels and VUV light sources. However, reactions between electrons and excited particles in the mixtures are so complicated that influence of the reactions on the plasma properties is not understood well. In this work, taking account of reactions through which electrons are produced, such as cumulative and Penning ionization, and of transition between excited levels, the electron and excited particle properties in Xe/Ne plasmas are calculated using the Boltzmann equation. The ionization coefficient and electron drift velocity agreed with experimental data. The influence of laser absorption in Xe/Ne plasmas on the plasma properties is also discussed. 25 refs., 15 figs.

  18. Ionization current in N2 gas. 11. Three dimensional analysis for loss processes of metastable particles affected by the reflection at the boundary; N2 gas chu ni okeru denri denryu. 11. Kyokai deno hansha wo koryoshita jun`antei reiki ryushi sonshitsu katei no sanjigen kaiseki

    Suzuki, S.; Ito, H.; Sekizawa, H.; Ikuta, N. [Chiba Institute of Technology, Chiba (Japan)


    Loss processes of the nitrogen metastable molecule N2(A{sup 3}{Sigma}u{sup +}) in plane parallel electrodes have been investigated by us previously by solving the diffusion equation. Our procedure is based on an analysis using the third kind of boundary condition which can take account of finite values for the density of N2(A{sup 3}{Sigma}u{sup +}) at the electrode surfaces. The values of the effective lifetime of N2(A{sup 3}{Sigma}u{sup +}) calculated from this analysis were reasonably consistent with our experiments. This paper describes the behavior of the effective lifetimes of N2(A{sup 3}{Sigma}u{sup +}) in a cylindrical cavity. The analytical treatment of the diffusion equation for N2(A{sup 3}{Sigma}u{sup +}) proposed by us is extended to the three dimensional space. We report the nature of the effective lifetimes of metastable molecule in the cylindrical cavity systematically. 16 refs., 9 figs.

  19. Electron attachment coefficient in low E/N regions and a discussion of discharge-instability in KrF laser. ; Analysis by logarithm transformed Boltzmann equation. Tei E/N ryoiki no denshi fuchaku keisu to KrF laser reiki hoden no fuanteisei ni kansuru ichi kosatsu. ; Tai su henkan Boltzmann hoteishiki ni yoru kaiseki

    Kawakami, H.; Urabe, J.; Yukimura, K. (Doshisha Univ., Kyoto (Japan))


    In a discharge excitation rare gas halide excima laser, uniform generation and stable maintenance of the excited discharge determines the laser characteristics. In this report, an approximate solution was obtained on the Boltzmann equation (frequently used for the theoretical analysis of this laser) to examine the nature of the solution. By optimizing the conversion of the variables, calculation of an electron swarm parameter in the hitherto uncertain range of the low conversion electric field was made possible, giving a generation mechanism of the uncertainty of the excited dischareg. The results are summarized as below. (1) The Boltzmann equation gives a linear solution for a logarithmic value of an electron energy in the range of low conversion electric field. (2) Time-wise responce ability between the measured voltage, current characteristics of the excitation discharge was clarified and the attachment and ionization coefficients calculated by Boltzmann equation. (3) Dependency of the attachment coefficient on the partial pressure of fluorine and kripton was examined, and the attachment coefficient was found to increase with the increase of the partial pressure for the both cases. 20 refs., 9 figs., 2 tabs.

  20. Numerical analysis flow around the main valve of hydraulic damper and effect of axial flow force on stability of the damper; Yuatsu benshiki semi acative damper shuben mawari no ryudo suchi kaiseki to ryutairyoku ga damper no anteisei ni oyobosu eikyo

    Sato, N. [Tohoku University, Sendai (Japan); Hayashi, S.; Hayase, T.; Shirai, A. [Tohoku Univ., Sendai (Japan). Inst. of Fluid Science


    In this study, the effect of a flange on the compensation of flow force in the main poppet valve of the hydraulic semi-active damper has been studied via numerical simulation. First, validity of the numerical analysis was confirmed by comparison between the computational and experimental results. Then, the mathematical models for the flow force acting on the poppet valves both with or without flange for converged flow were obtained based on the computational results. Introducing these mathematical models to the equivalent model of the whole semi-active damper system in the previous paper, the effects of the flow force on the stability of the damper system were investigated. As the result, the flange improves the stability of the system when the pressure difference and the main valve displacement are relatively large. (author)

  1. Structural analysis of lignin by pyrolysis-gas chromatography. 7. Conditions for acid hydrolysis of wood pulp and characteristics of acid-insoluble residues; Netsubunkai gas chromatography ni yoru lignin no kozo kaiseki. 7. Mokuzai pulp no sankasuibunkai joken to sanfuyosei zansa no seijo

    Oi, H.; Ju, Y.; Kuroda, K. [The University of Tsukuba, Tsukuba (Japan)


    In order to simply analyze lignin present in wood/pulp and the carbohydrate composition, an attempt was made to improve hydrolysis conditions. The tests used pulp samples from degreased akamatsu (Pinus densiflora) meals, akamatsu holocellulose and akamatsu chips. Four methods were tested for acid hydrolysis; the Klason lignin, Yoshiwara, carbohydrate composition and modified carbohydrate composition methods. The acid-insoluble residues were analyzed by pyrolysis-gas chromatography, and the pyrograms prepared under different hydrolysis conditions were compared with each other. The test results indicate that the lignin and composition methods need 2.5h of the primary hydrolysis treatment with 72% sulfuric acid, time of this treatment should be increased to 2.5h for the carbohydrate composition method, and the modified carbohydrate method can quantitatively analyze lignin present in many wood and pulp samples. 7 refs., 6 figs., 3 tabs.

  2. New stimulation method with the function of narrowing and moving the stimulated region for cochlear implants. Its evaluation by the animal experiment and the numerical analysis; Jinko naiji no tame no shigeki bui no seneika to ido kino wo motta shigeki hoshiki. Suchi kaiseki to dobutsu jikken ni yoru hyoka

    Miyoshi, S.; Sakajiri, M.; Ifukube, T.; Matsushima, J. [Hokkaido University, Sapporo (Japan)


    The electrical stimulation of the auditory nerve can elicit auditory sensations in the subjects with sensorineural deafness. Each stimulating electrode of an electrode array of the multi-channel cochlear implants may stimulate a distinct neural population. However, a great deal of current spreads from each electrode throughout a lymph because of the high electrical conductivity of the lymph liquid. This phenomenon causes the transmitted information to be reduce due to channel interactions. Even if the number of electrodes is increased, the transmitted information will be limited because of current spread. We have proposed the Tripolar Electrode Stimulation Method (TESM) which may succeed in narrowing the stimulation region and continuously moving the stimulation site for the cochlear implants. We evaluate whether or not TESM works according to a theory which is based on the numerical analysis using the auditory nerve fiber model consisted of unmyelinated and myelinated segments. In this simulation, the neural site and the am of the excited fibers are compared with the compound action potentials which we obtained through animal experiments. As a result, based on the numerical analysis using this model, it is also proved that the anodal/cathodal threshold stimulation current ratio increases by decreasing unmyelinated segment between the inner hair cell and the habenula perforate. Also by comparing the result of the numerical analysis with that of the animal experiment, It is suggested that an effect of the unmyelinated segment is not significant. Based on their results mentioned above, we succeed in narrowing a Stimulation region by controlling the am of the currents emitted from the electrodes on both sides. Also we succeed in continuously moving a stimulation site by changing the ratio of the currents emitted from the electrodes on both sides. 11 refs., 14 figs., 1 tab.

  3. Stratified charge combustion system using pilot flame ignition. Application to a model combustion chamber of Wankel-type rotary engine; Pilot kaen chakka ni yoru sojo kyuki nensho hoshiki no kenkyu. Wankel gata rotary kikan no model nenshoshitsu ni okeru nensho kaiseki

    Moriyoshi, Y.; Muroki, T.; Song, Y. [Chiba University, Chiba (Japan). Faculty of Engineering


    The ignition mechanism of a pilot flame in a stratified charge mixture was examined using a model combustion chamber of a Wankel-type rotary engine. Experimental study such as LDV measurement, pressure data analysis, high-speed photography and image analysis provides detailed knowledge concerning the stratified charge combustion, which is complemented by theoretical study of the mixture formation process inside the combustion chamber. Characteristics of the pilot flame as an ignition source and the mixture formation inside the model chamber required for enhanced combustion are determined in this study. 6 refs., 11 figs., 2 tabs.

  4. Experimental investigation of the generation mechanism of aerodynamic noise. 2nd Report. On correlation between surface pressure fluctuation and aerodynamic sound radiated from a circular cylinder; Kurikion no hassei kiko ni kansuru jikken kaiseki. 2. Hyomen atsuryoku hendo to kurikion no sogo sokan ni tsuite

    Iida, A.; Kato, C.; Otaguro, T. [Hitachi, Ltd., Tokyo (Japan); Fujita, H. [Nihon University, Tokyo (Japan). College of Science and Technology


    The mechanism of aerodynamic sound generation from a circular cylinder is investigated experimentally using coherence functions between surface pressure fluctuation and radiated sound at Reynolds numbers from 10{sup 4} to 1.4 {times} 10{sup 5}. The correlation between the surface pressure fluctuation and the radiated sound at the fundamental frequency is good, indicating the strong contribution of ordered structures to aerodynamic sound generation. The characteristic length of ordered structure Lc is estimated using the integral scale of the spanwise coherence function of surface pressure fluctuations. The sound pressure is calculated using a modified Curle`s equation, with the characteristic length and measured surface pressure fluctuations. The predicted spectra of radiated sound are in good agreement with those actually measured up to five times the fundamental frequency. This result shows that Lc, is useful for estimating the character of radiated sound from a circular cylinder. 16 refs., 13 figs., 2 tabs.

  5. Experimental investigation of generation mechanism of aerodynamic noise. 1st Report. On a coherent structure of surface pressure fluctuation on a circular cylinder; Kurikion no hassei kiko ni kansuru jikken kaiseki. 1. Enchu hyomen atsuryoku hendo no kukan kozo ni tsuite

    Iida, A.; Kato, C.; Takano, Y. [Hitachi, Ltd., Tokyo (Japan); Fujita, H. [Tokyo Institute of Technology, Tokyo (Japan)


    Spanwise coherent structure of surface pressure fluctuation on a circular cylinder is studied experimentally in order to obtain quantitative information for understanding the generation mechanism of aerodynamic sound from the cylinder at Reynolds numbers between 5{times}10{sup 3} and 1.4{times}10{sup 5}. Span wise distribution of the coherence function between surface pressures is kept as high as up to several diameters for the frequency components of the so-called orderly structure, or the Karman vortex shedding frequency and its harmonics, while the coherence function for the turbulent frequency component decays rapidly span wise to half-diameter. Span wise coherence function of the surface pressure is calculated as an exponential function of span wise spacing and Reynolds number. The correlation length of the flow structure is found to be inversely proportional to Re{sup 1/2}. 18 refs., 13 figs., 1 tab.

  6. Research report for fiscal 1996 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology. Evaluation on durability of device installed with inverter to protect grid connection; 1996 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka - Inbata tsuki keito renkei hogo sochi no taikyusei hyoka



    Discussions and evaluations have been performed on the safety and durability of the device installed with inverter to protect grid connection being an important device in the photovoltaic power generation system. This paper summarizes the achievements in fiscal 1996. The current fiscal year performed data collection and long-term continuous operation according to the durability test program for the device installed with inverter to protect grid connection, as the continuation from the previous fiscal year. In the electrical characteristics, although no large changes have been found in AC overvoltage and AC undervoltage, instability was observed in the detection level. With regard to temperatures in different components, the temperature rise has become nearly the same as in the maximum output continuous operation as a result of the repetition of the operation and shutdown, whereas the influence on the electrical and thermal stresses have increased. Particularly, when temperature rise in the AC side noise filter was given observation, the measurement of conductive high-frequency terminal voltage showed a value higher by several ten dB than in the previous fiscal year. The current fiscal year has gone farther to starting the measurement of noise electric field intensity as the base of electromagnetic interference. (NEDO)

  7. Research report for fiscal 1995 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology (putting of related data into order); 1995 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka (Kanren data no seibi)



    Research and development has been performed with the objectives to establish an evaluation technology for load leveling effect by using a small photovoltaic power generation system for residential use, to clarify the effectiveness of the system as a discrete power supply source through demonstration operation, and furthermore to achieve optimization of the small photovoltaic power generation system for residential use. This paper describes the actual state survey data related to grid connection systems for the small photovoltaic power generation system for residential use. The survey has been performed mainly on the system for individuals' use inside and outside Japan with regard to the small grid connection systems of 1-10 kW scale. The number of survey has reached 216 cases for 46 prefectures in Japan (1,004.02 kW in total), and 47 cases for 13 other countries (205.60 kW in total), or 263 cases in grand total (1,209.63 kW). These 263 cases were tabulated with items of owners (or the facility names and installation locations) as seen by territories (prefectures or countries), facility operators (or executing organizations), connection modes, and power generation scales. These data will serve for discussions on the load leveling effect and the optimized system forms. (NEDO)

  8. Research report for fiscal 1996 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology, of which IEA international cooperation project; 1996 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka no uchi IEA kokusai kyoryoku jigyo



    This paper summarizes the activities related to the Annex II 'Communication technology for DSM' in the international cooperation agreement on the DSM program by IEA. With regard to the 'needs in relation with DSM and the related functions and the communication technology between the demand side and the electric power companies required for the execution thereof', a survey has been made by sending question letters to ten membership nations, which has been compiled into a report. With respect to the 'evaluation on the method for international cooperation on standardization of the communication technology', replies to the question letters from the membership nations were analyzed. Decisions were given on the standards directly related to the communication technology for DSM, the standard drafting organizations, and the working groups. With regard to the 'evaluation on priority on research, development and demonstration of the communication technology for DSM', propositions were given as the project on the technology for communications inside a building for DSM and the related functions, development and transfer of DSM and the related functions from the communication media for a narrow band to a wide band, and specifications for the customers' terminals. In developing the general purpose personal computer software 'eaCOMMS', distribution and discussions were given on the trial edition. (NEDO)

  9. Research report for fiscal 1995 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology. Evaluation on durability of device installed with inverter to protect grid connection; 1995 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka - Inbata tsuki keito renkei hogo sochi no taikyusei hyoka



    Discussions and evaluations have been performed on the safety and durability of the device installed with inverter to protect grid connection being an important device in the photovoltaic power generation system. In discussing the durability test items, electrical property changes were observed on AC overvoltage, AC undervoltage, frequency rise, and frequency fall, as the continuation from the previous fiscal year, in order to evaluate temperature rise in different parts due to lapse of operation time and the effects of thermal stress in each component on the stress of the entire product. Furthermore, verification of single operation detecting function, tests on sudden input power change, sudden grid voltage change, and measurement of conductive high frequency terminal voltage were conducted in addition to the above observations. In discussing the durability test methods, repetition of operation and shutdown during the rated operation was adopted in place of the simulated operation using variation in the insolation having been discussed in the previous year. As a result of the tests, no noticeable changes were recognized from the evaluation result after a lapse of 5,000 hours from the start of the operation, as compared to those after the aging operation. (NEDO)

  10. Research report for fiscal 1997 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology. Evaluation on durability of device installed with inverter to protect grid connection; 1997 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka - Inbata tsuki keito renkei hogo sochi no taikyusei hyoka



    Tests and discussions have been performed on the safety and durability of the device installed with inverter to protect grid connection, being an important device in the photovoltaic power generation system. The particularly important requirements demanded in the device were specified as maintenance of electric power quality, coordination with the protection system in the grid side, and assurance of safety of personnel and facilities. The current fiscal year has performed operation corresponding to that in the actual field for 20 years in total, and the evaluation tests on electrical characteristics and electric power quality. This paper summarizes the achievements in four years including the results available up to the previous fiscal year. Although no large change has been identified in the electrical characteristics, variance has been found in the detection time of overvoltage in the grid side. With regard to the electric power quality, the value has exceeded 89 dB as the determining condition for the certification test in the conduction interfering waves of 5 kHz to 10 kHz. In addition, it was confirmed that the conductive high-frequency noise terminal voltage in the grid side after the repetition of operations and shutdowns tends to increase according to the operation lapse time. (NEDO)

  11. Research report for fiscal 1996 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology; 1996 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka



    Tests and researches have been performed with the objectives to establish an evaluation technology for load leveling effect by using a small photovoltaic power generation system for residential use, to clarify the effectiveness of the system as a discrete power supply source through demonstration operation, and furthermore to achieve optimization of designs of the small photovoltaic power generation system for residential use. This paper summarizes the achievements in fiscal 1996. The current fiscal year has performed collection of data of the demonstration operation, checked the consistency in photovoltaic power generation characteristics, and housing and distribution line load characteristics, and the results were mounted on the database. The demonstration operation data were used to analyze and evaluate the facility utilization rate in the photovoltaic power generation, photovoltaic power generation dependence of the house load, load rate, and peak load reduction rate. As a result, it was found that not much of the peak load reduction effect by the photovoltaic power generation was recognized because the house load is related mainly on lighting load. However, as seen from the distribution line load, the peak load reduction was recognized when the house load and the commercial and industrial load are mixed, whereas it was revealed that the reduction effect is worth evaluation. (NEDO)

  12. Research report for fiscal 1995 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology; 1995 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka



    Research and development has been performed with the objectives to establish an evaluation technology for load leveling effect by using a small photovoltaic power generation system for residential use, to clarify the effectiveness of the system as a discrete power supply source through demonstration operation, and furthermore to achieve optimization of the small photovoltaic power generation system for residential use. This paper summarizes the achievements in fiscal 1995. With the demonstration operation in the current fiscal year, through-the-year data have been accumulated for the first time since the start of the demonstration operation, and were mounted on the load leveling database. As a result of analyzing the demonstration operation data, the following points were revealed: regarding the housing load, the lighting load is the main factor both in summer and winter; the effect of reducing the peak load by photovoltaic power generation is recognized at about 60% as maximum, but the substantial effect has large variation, hence stochastic; and the reverse current becomes the main factor during daytime, not necessarily leading to improvement of the housing load characteristics in the aspect of load rate. According to the surveys on the energy demand trends up to the year 2030, the power supply configuration, and introduction cost, it was revealed that the photovoltaic power generation can be sufficiently expected as a power supply to handle the peak load. (NEDO)

  13. Fiscal 1994 research report. Demonstration test for establishing technology for peakload shaving with dispersed small residential PV systems (Evaluation of weatherability of house-use solar light electric power generating system equipment); 1994 nendo jutakuyo taiyoko hatsuden fuka heijunka gijutsu nado kakuritsu jissho shiken ni kansuru kaiseki hyoka no uchi jutakuyo taiyoko hatsuden system kiki no taikosei hyoka



    Weatherability tests such as exposure to the atmosphere are conducted to collect and accumulate information on the degradation of house-use photovoltaic equipment expected to come into use in areas where weather conditions are hostile. Based on the thus collected data, analysis and evaluation are conducted about the mechanisms of corrosion and degradation for the establishment of designing and evaluating methods for maintaining weatherability. Since fiscal 1994 is the first year of the project, preparations are made for tests to be conducted. In carrying out research activities, a Weatherability Evaluation Committee for House-Use Solar Light Electric Power Generating System Equipment is organized, who discuss implementation of the project. Discussion is made on the shape and structural materials of the exposure rack. An aluminum alloy coated with a clear coating of alumite sulfate is selected, and a rack is built. Specifications of a sea salt particle collector are discussed, and preparations are made for arresting and quantifying sea salt particles under the Japanese Industrial Standard (JIS) dry gauze method and the International Organization for Standardization (ISO) wet candle method. Solar cell module initial characteristics are measured. (NEDO)

  14. Research report for fiscal 1997 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology; 1997 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka



    Tests and researches have been performed with the objectives to establish an evaluation technology for load leveling effect by using a small photovoltaic power generation system for residential use, to clarify the effectiveness of the system as a discrete power supply source through demonstration operation, and furthermore to achieve optimization of designs of the small photovoltaic power generation system for residential use. This paper summarizes the achievements in fiscal 1997. The current fiscal year has performed the continued collection of data of the demonstration operation, and analysis and evaluation on the photovoltaic power generation characteristics and the house load characteristics. According to the data analysis result for fiscals 1995 through 1997, it was shown that, although the photovoltaic power generation system for residential use does not contribute much to load leveling in a house, it contributes to load leveling in the distribution line on the whole or a case as large as a grid. In addition, according to the survey on users who have installed the photovoltaic power generation system, it was indicated that the consciousness of electric power and energy conservation has heightened. The capacity of a photovoltaic power generation system for residential use is 3 kW for a standard type of home, which can take care of more than 60% of the house load. It was concluded that, if a storage battery of small capacity is accommodated, the system is effective for reduction of momentary peak load, enhancement of the power quality, and supply of power at a disaster. (NEDO)

  15. Simulations of methane gas flow in the drainage pipeline network in a coal mine. (1st report). Simulation program for calculation of gas flow in the drainage pipeline network; Tanko ni okeru gas nuki kanmo no ryuryo simulation (1). Gas nuki kanmo no ryuryo kaiseki program

    Oga, K.; Hiramatsu, A.; Higuchi, K. [Hokkaido Univ., Sapporo (Japan)] Kiyono, K. [Japan Heavy Chemical Industry Co., Tokyo (Japan)] Ota, S. [Tokyo Sekkai Kogyo Co. Ltd., Tochigi (Japan)


    At present in a coal mine, various types of gas drainage borings are carried out. As the dilution process of methane by means of ventilation emits methane in the air ultimately which is a artificial greenhouse effect gas, it is a large problem taking into consideration of earth environment. In order to reduce the methane emission from mining panels into the working area, an effective methane drainage from the coal seam at the high concentrations of methane is needed. One of the methods is to control the pressure at the optimum level in methane drainage pipeline network. Authors developed a simulation program for calculation of methane gas flow in methane drainage pipelines of an underground coal mine to control the flow rate of gas and concentration of methane in the network. Some cases were calculated by modeling the practical methane drainage pipelines networks of Taiheiyo Coal Mine. As a result, there was no difference between the calculated results using the developed calculation program and the practical measured results. 4 refs., 8 figs., 1 tab.

  16. Fiscal 2000 information collection/analysis project on basic research for coal resource exploitation. Research on technology of low-concentration methane gas recovery from underground coal mine; 2000 nendo sekitan shigen kaihatsu kiso chosa joho shushu kaiseki jigyo. Konaikutsu tanko ni okeru teinodo methane kaishu gijutsu chosa



    Technical trends were surveyed concerning the recovery and the use as fuel of low-concentration methane gas or the like contained in the air ventilated out of coal mines. Methane gas recovery technologies include high-temperature incinerators and catalytic incinerators designed to collect heat, method of conversion of methane to CO2 using microbes named methanotrophs, and adsorption methods using activated charcoal, zeolite, or the like. Among technologies that have reached a practical level in the utilization of mine methane gas, there are the temperature regenerative flow-reversal reactor (TFRR) and the catalytic flow-reversal reactor (CFRR) utilizing high-temperature oxidation reaction. TFRR has been reported effective by MEGTEC System after a 6-month operational test of a 3.0m{sup 3}/s plant at a British coal mine. Test and research are over with CFRR, which is now ready for a commercial scale verification test. Recovery by adsorption, though worth further research efforts, is economically away from commercialization at the present stage, and wants more studies of adsorbents, etc. (NEDO)

  17. Fiscal 2000 report on basic survey of coal resource development. Information collection and analysis project (Technical cooperation project on coal mine methane gas recovery and utilization); 2000 nendo sekitan shigen kaihatsu kiso chosa (joho shushu kaiseki jigyo) hokokusho. Tanko methane gas kaishu riyo gijutsu kyoryoku jigyo



    A survey was conducted to construct a simulation technique for predicting changes in the behavior of gas to accompany digging in Australian coal mines. The survey activities were conducted in the mining area of the Wambo colliery in the Hunter valley, New South Wales, which involved the acquisition of geotechnological data including the amount of coal reserves and the amount of methane gas held in the coal seams, drilling of 19 test bores (with cores sampled from some of them), geophysical logging of the test bores, seismic exploration, analysis of the sampled cores, rock tests, modelling of the geological structure, testing of gas from the coal seams, modelling of the state of existence of the gas, and so forth. It was found that the amount of gas held in the coal seams at levels 200m or deeper was larger than 9m{sup 3}/t. Existing software programs were examined as to whether they could be used for the preparation of a gas behavior simulation program, and it was found that none of them was capable of helping the simultaneous simulation of rock deformation due to drilling and the resultant change in multi-phase gas behavior. The conclusion was that it was necessary to newly develop a comprehensive simulation software program. (NEDO)

  18. Fiscal 1999 survey report. Basic survey for development of coal resources - project for information collection and analysis (technical cooperation project for recovery and utilization of mine methane); 1999 nendo sekitan shigen kaihatsu kiso chosa (joho shushu kaiseki jigyo) hokokusho. Tanko methane gas kaishu riyo gijutsu kyoryoku jigyo



    The purpose of this project is to reduce environmental load by investigating the recovery/utilization technologies of mine methane gas, to build predictive simulation for the behavioral change in methane gas that is incidental to underground mining, and to reflect the simulation on the optimum mining plan. Performed in the survey this year were the information collection/analysis of the coal and gas resources, exploratory boring for the purpose of grasping the geology, coal bed and gas abundance in the selected survey sites, measurement of coal bed gas reservoir, and the survey of geotechnological features. The operations were as follows; collection of existing geological data and selection of exploratory boring sites for Arrowfield layers and Bowfield layers in the Hunter Valley region. The coal bed gas reservoir and the composition of the coal cores obtained in eight borings this year provided precious gas data along with the survey results performed in the subject sites in the past. In particular, significant data necessary for depth coal development were also obtained in the surrounding mines including the subject survey sites. It was confirmed that the gas reservoir in the coal bed was 8 m{sup 3}/t to 9 m{sup 3}/t on the average. (NEDO)

  19. Geological information obtained from rock magnetism and magnetic anomaly. Rock magnetism measurement and geomagnetic anomaly analysis in the forearc shelf of Northeast Japan; Ganseki jiki to jiki ijo kara erareru chishitsu joho. Tohoku Nippon zenko rikudana ni okeru ganseki jiki sokutei to chijiki ijo kaiseki

    Nagasaki, Y. [Japan National Oil Corp., Tokyo (Japan)


    Improved accuracy and efficiency of magnetism analysis has advanced magnetic exploitation from a mere tool for exploitation of iron ore deposits to a general tool for analyzing geological structures. Magnetism in a bed rock and presence of a rock of high magnetism penetrating a bed rock cause magnetic anomaly, and it is possible to grasp morphology of a sedimentary basin by analyzing its magnetic anomaly observed, for exploitation of oil and natural gas. Magnitude of anomaly must be handled as vector sum of induction and residual magnetization. However, it is sometimes erroneously explained by use of a model which neglects the effect of residual magnetization. This paper reviews the basic aspects of anomaly analysis, and describes an example in which seismic exploitation based on the reflection method, gravity anomaly and magnetism anomaly are considered to explain geological structures, taking, as a case study, geomagnetism anomaly observed off Sanriku. The rock-magnetical geological structures are clarified by a variety of tests, including those for demagnetization of the samples by stepwise applied alternating current and heat. 9 refs., 8 figs.

  20. Statistical analysis of thermal efficiency in industrial furnaces in Japan and determination of CO2 reduction amount realized by improving the efficiency; Nippon no kogyoro ni okeru netsukoritsu no tokeiteki kaiseki to sono kaizen ni yoru CO2 sakugenryo no suitei

    Iwabayashi, T.; Matsuhashi, T.; Ishitani, H. [The University of Tokyo, Tokyo (Japan). Faculty of Engineering; Tanabe, K. [The Energy Conservation Center Japan, Tokyo (Japan); Tanaka, R. [The Japan Industrial Furnace Manufacturers Association, Tokyo (Japan); Takashima, T.


    Analyses and evaluations were given on heating furnaces and heat treatment furnaces used in the Japanese steel and iron industry to calculate amounts of energy and CO2 that could be reduced by introducing a new furnace. The analyses have derived factors affecting thermal efficiency of the heating furnaces by using regression analysis. Discussions were given on a high-temperature air combustion system and a stored heat combustion system as new furnace technologies. As a result, it was disclosed that the current fuel consumption could be reduced to about 40% to 80% only by performing air pre-heating ideally and suppressing heat loss from furnace walls. This concept is sufficiently payable in terms of economy. It was also revealed that fuel consumption could be reduced to about 12% to 36% and CO2 discharge could be reduced in proportion with reduction in the fuel consumption, if ideal preheating can be carried out on materials to be heated. Furthermore, a result was obtained that the present thermal efficiency of 26.86% in nonferrous industries such as for copper and aluminum could be increased up to 53.37%. 10 refs., 19 figs., 1 tab.

  1. Enhancement of condensation heat transfer using an electric field. 2nd Report. Model analysis on heat transfer enhancement using a bare wire electrode; Denba ni yoru gyoshuku netsu dentatsu no sokushin ni kansuru kenkyu. 2. Rasen denkyoku ni okeru dennetsu sokushin no model kaiseki

    Chu, R. [Gifu University, Gifu (Japan). Faculty of Engineering; Nishio, S. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science; Tanasawa, I. [Nihon University, Tokyo (Japan). Faculty of Engineering


    A model experiment was conducted to investigate the dynamic behavior of a liquid sheet under an electric field applied parallel to the flow direction. It was confirmed that the liquid sheet was changed into columns when the applied voltage exceeded a certain critical value. Then a model analysis based on a linear stability theory was carried out to predict the critical applied voltage and it was shown that the analytical results were in good agreement with the measured values. Further, based on the above-mentioned model describing the dynamic behavior of the liquid sheet, an analytical model predicting the EHD effect on condensation heat transfer for a finned tube was presented. It was shown that the predicted results were in good agreement with the experimental data on the flooding angle and condensation heat transfer coefficient for a finned tube under electric fields. (author)

  2. Numerical analysis of natural convection in thermoelectrically conducting fluids in a cubic cavity under a constant magnetic field. 2nd Report. Effect of direction of magnetic field on thermal and velocity field on thermal and velocity fields; Jibaka ni okeru denji netsuryutai no rippotai cavity nai shizen tairyu kaiseki. 2. Inka jiba hoko no netsuryudoba eno eikyo

    Nakai, T.; Tanahashi, T. [Keio University, Tokyo (Japan). Faculty of Science and Technology


    In a previous paper, we investigated the natural convection in thermoelectrically conducting fluids in a cubic cavity under a magnetic field applied in the gravitational direction, and complicated fluid phenomena were clarified. Particularly in the case of mercury (Pr=0.025, Gr=3.75{times}10{sup 7}), the numerical results agreed well with the observed experimental results obtained using a thermosensitive liquid crystal sheet. In the present paper, we aim to explain the fundamental behavior of thermoelectrically conducting fluids, and numerically determine the natural convection by considering a different direction for the applied magnetic field. The direction of the applied magnetic field is chosen as either the +x, -y or +z direction (see Fig. 1). The convective inhibitory effect of the Lorentz force increases in the order of the +x, -y and +z-directions. 11 refs., 7 figs., 2 tabs.

  3. Numerical analysis of natural convection of thermoelectrically conducting fluids in a cubic cavity under a constant magnetic field. 3rd Report. Heat transfer enhancement effect, discrete del operator method; Jibaka ni okeru denjinetsu ryutai no rippotai cavity nai shizen tairyu kaiseki. 3. Jakujibaka no dennetsu sokushin koka, risanka nabura enzanshiho

    Nakai, T.; Tanahashi, T. [Keio University, Tokyo (Japan). Faculty of Science and Technology


    Generally speaking, the finite-element method in computational fluid dynamics is universally accepted, however computation by the CPU is time-consuming and requires large memory capacity for data storage. Therefore development of an analytical formulation to reduce the time and storage required for calculation is desired. In this paper, we propose a novel discrete del operator method in order to overcome these defects. This method is formulated using the discrete del operator as the element coefficient matrices in finite-element analysis, and low-memory and high-speed calculations are carried out. In particular, we examine whether this method is effective for the numerical analysis of natural convection of thermoelectrically conducting fluids in a cubic cavity. Moreover, we estimate the effect of heat transfer enhancement under a weak magnetic field on the Hartmann number. 13 refs., 5 figs., 6 tabs.

  4. Development of a new numerical method for visco-elastic flows using the GSMAC-method and the MUSCL-TVD method. Flows of Maxwell fluid through planer abrupt contraction; Kosei hoteishiki ni TVD gata MUSCL ho wo mochiita GSMAC ho ni yoru nendansei ryutai no kaiseki ni tekishita scheme kaihatsu. Maxwell ryutai no kyushuku shoheibannai nagare ni yoru kensho

    Fujieda, T.; Tanahashi, T.; Okada, A. [Keio University, Tokyo (Japan). Faculty of Science and Technology; Kato, Y. [Asahi Glass Co. Ltd., Tokyo (Japan)


    In this paper, we propose a new GSMAC-FEM (generalized simplified marker and cell-finite element method) which is suited to the numerical analysis of visco-elastic fluids. The equation of continuity and the equation of momentum are solved by the GSMAC-FEM algorithm and the constitutive equation is solved by the finite volume method. This scheme employs the third order MUSCL (Monotone Upstream-centered Schemes for Conservation Law) in order to guarantee the absence of spurious oscillation near the steep gradients of the variable. This method uses a minmod limiter in order to satisfy the TVD (Total Variation Diminishing) condition. The present method employs the simultaneous relaxation of velocity and pressure for the incompressible condition. The flows of Maxwell fluid through two-dimensional planer abrupt contraction are calculated by the present method and the effects the Weissenberg number and the Reynolds number are discussed. 13 refs., 12 figs.

  5. Quantitative analysis of schlieren photographs for internal combustion engine diagnostics. 2nd Report. ; Smoothing of background distortion and analytical results of transient wall-impinging jet. Nainen kikan ni okeru schlieren shashin no teiryoka gazo shoriho ni kansuru kenkyu. 2. ; Background no yugami jokyo, narabini hiteijo hekimen shototsu funryu no kaiseki kekka

    Ouchi, H.; Chikahisa, T.; Murayama, T. (Hokkaido Univ., Sapporo (Japan). Faculty of Engineering)


    It was previously reported, for the research on the internal combustion engine, that the quantitative analysis of Schlieren photographs, one of simple visualization technologies, is effective on the heightening in accuracy of the analysis by Schlieren photographs and however, insufficient in countermeasures against the background distortion, causing errors. Then, by removing background distortion and analyzing Schlieren photographs, taken of transient wall-impinging jet, evaluation was made of the present quantitative analysis. As a result, a method could be shown to effectively correct the background distortion. Further, upon analyzing transient wall-impinging jet by that method, result could be obtained to be sufficiently accurate to grasp its structural characteristics. The resent quantitative analysis is advantageous in capability of, among others, monentarily quantify the two-dimensional phenomenon by a simple unit, and support the quantitative information for the Schlieren measurerment, widely used in the research on the internal combustion engine. 8 refs., 8 figs.

  6. FY 1998 annual summary report on manipulation of atomic and molecular extremes. Development of technologies for high-efficiency analysis/manipulation of DNA and the like; 1998 nendo genshi bunshi kyokugen sosa gijutsu no kenkyu kaihatsu seika hokokusho. DNA nado kokoritsu kaiseki sosa gijutsu kaihatsu



    The objectives are set to establish the techniques for observation/manipulation of atoms and molecules, as the common basic techniques for various industrial areas, e.g., new materials, electronics, biotechnology and chemical. Development of atomic field and scanning tunneling microscopes working under extreme conditions has been pursued, in order to manipulate complex systems, such as living body. For identification of molecular species, laser-excited fluorescence is combined with scanning mechanical probing to further refine the single molecule detection/identification techniques, and the objectives are set to develop a new method for evaluating molecules in a living body using a scanning probe microscope, and also to develop a novel scanning probe microscope for molecules in a living body. The other efforts were directed to R and D of the techniques for observing structures of organic molecules and the like through the measurements of adsorption process of organic molecules and clusters on semiconductor substrates and their surface reactions, and precision measurements of vibrational conditions of adsorbed molecular species reacting in the solid-liquid interfaces by high-sensitivity Raman spectroscopy to elucidate the catalysis mechanisms at the molecular level. (NEDO)

  7. Ab Initio MO study on the nucleophilic oxirane ring opening of exo and endo Aflatoxin B{sub 1} 8,9-Oxide; Ekiso oyobi endo Aflatoxin B{sub 1} 8,9-Oxide no kyukaku kaikan hanno ni taisuru Ab Initio ho ni yoru kaiseki

    Okajima, Toshiya; Hashikawa, Akane [Saga University, Saga (Japan). Department of Chemistry


    The difference of the reactivity for S{sub N}2 type oxirane ring opening of exo and endo Aflatoxin B{sub 1} (AFB{sub 1}) 8,9-oxide (exo-1 and endo-1, respectively) was analyzed with ab initio molecular orbital theory. All stationary points including transition-state structures were optimized with no geometry constraint at the RHF/3-21G basis set, and energies were evaluate at Becke3LYP/3-21G level based on the RHF/3-21G geometries. The calculation clarified the following three points: (1) the activation energy ({delta}E{sup {ne}}) for endo attacking of NH{sub 3} molecule (the reaction with exo derivatives containing exo-1) is considerably smaller than those for exo attacking (the reaction with endo ones containing endo-1), (2) the reactivity for nucleophilic oxirane ring opening is controlled by the distortion of LUMO{sub C-O} of oxirane ring, which is probably caused by exo/endo relationship between oxirane ring and five-membered dihydrofurano ring (B) with respect to A ring, and (3) the remaining part (inclusing coumarin skeleton) of AFB{sub 1} oxid has little influence on the geometry around the reaction center and the activation energy. (author)

  8. Fiscal 1998 R and D project on industrial technology. Development report on use technology of bioresources such as bioconsortia (Development of analysis technology of bioconsortia); 1998 nendo sangyo gijutsu kenkyu kaihatsu jigyo. Fukugo seibutsukeinado seibutsu shigen riyo gijutsu kaihatsu (fukugo seibutsukei kaiseki gijutsu no kaihatsu)



    For use of advanced functions of bioconsortia (complex microorganisms composed of more than 2 microorganisms with certain specific function), this project analyzes specific functions of specific organisms and the interaction between the specific functions, and develops isolation and incubation technologies of component organisms. In fiscal 1998, to promote this project, the meetings were held frequently in National Institute of Bioscience and human Technology. Study was made on production of useful substances and useful degradation functions in association with bioconsortia. The result showed that microorganisms coexisting with nematode produced physiologically active substances exhibiting antimicrobial activities to tubercle bacillus, MRSA and others, microorganisms coexisting in eggs of some insects produced substances having antiviral activities and activities against pathogenic bacteria in a plant, and microorganisms growing in some plants or mycorrhiza organisms produced insecticidal substances or growing-promoting substance. The basic understanding was obtained on cooperative actions of bioconsortia to bioremediation and degradation of organic substances. (NEDO)

  9. Achievement report for fiscal 1997 on the development of technologies for utilizing biological resources such as complex biosystems. Development of complex biosystem analyzing technology; 1997 nendo fukugo seibutsukei nado seibutsu shigen riyo gijutsu kaihatsu seika hokokusho. Fukugo seibutsukei kaiseki gijutsu no kaihatsu



    The aim is to utilize the sophisticated functions of complex biosystems. In the research and development of technologies for effectively utilizing unexploited resources and substances such as seeweeds and algae, seaweeds are added to seawater to turn into a microbial suspension after the passage of two weeks, the suspension is next scattered on a carageenan culture medium, and then carageenan decomposing microbes are obtained. In the research and development of technologies for utilizing microbe/fauna-flora complex systems, technologies for exploring and analyzing microbes are studied. For this purpose, 48 kinds of sponges and 300 kinds of bacteria symbiotic with the sponges are sampled in Malaysia. Out of them, 15 exhibit enzyme inhibition and Artemia salina lethality activities. In the development of technologies for analyzing the functions of microbes engaged in the production of useful resources and substances for animals and plants, 150 kinds of micro-algae are subjected to screening using protease and chitinase inhibiting activities as the indexes, and it is found that an extract of Isochrysis galbana displays an intense inhibitory activity. The alga is cultured in quantities, the active component is isolated from 20g of dried alga, and its constitution is determined. (NEDO)

  10. Numerical analysis on the deformation of free surface of magnetic fluid. 1st Report. In the case of steady non-uniform magnetic field; Jisei ryutai no jiyu kaimen no henkei ni kansuru suchi kaiseki. 1. Teijo hiichiyo jiba no baai

    Nam, W.; Watanabe, T. [Iwate University, Iwate (Japan)


    Numerical analysis is conducted on the deformation of the free surface of a magnetic fluid. Applied magnetic fields are steadily induced by a circular current loop located under the magnetic fluid. Governing equations of magnetic fields are solved using the concept of vector potential. Fluid flow is calculated by using the finite volume method with marker particles. The surface of the magnetic fluid is formed the balance of surface force, gravity, pressure difference, magnetic normal pressure and magnetic body force. The results of simulation show the instability of the free surface of the magnetic fluid due to the effect of the magnetic terms. The rise and fall pattern of the free surface of the magnetic fluid are qualitatively clarified, and the patterns of a steady nonuniform magnetic field induced by a circular current loop are quantitatively presented. 8 refs., 8 figs.

  11. Sadness and Beauty Couched in Yasunari Kawabata's Works of Literature——A Case Study of The Izu Dancer%论川端康成文学作品中的悲与美——以《伊豆的舞女》为例



    The Izu Dancer,a work written by Japanese author Yasunari Kawabata in his early career,is a masterpiece typical of his unique literary style.This story is representative of Japanese traditional aesthetics,namely,elegance,sadness and yugen.By analyzing the%《伊豆的舞女》是日本文学家川端康成前期的创作作品,是他开创自己独特文学风格的杰作。这部作品体现了日本传统的风雅、物哀、幽玄之美。通过对《伊豆的舞女》美学意境的分析能够解读川端康成文学作品中悲与美相结合的审美意识。

  12. Spin-Orbit Coupling Controlled J =3 /2 Electronic Ground State in 5 d3 Oxides

    Taylor, A. E.; Calder, S.; Morrow, R.; Feng, H. L.; Upton, M. H.; Lumsden, M. D.; Yamaura, K.; Woodward, P. M.; Christianson, A. D.


    Entanglement of spin and orbital degrees of freedom drives the formation of novel quantum and topological physical states. Here we report resonant inelastic x-ray scattering measurements of the transition metal oxides Ca3 LiOsO6 and Ba2 YOsO6 , which reveals a dramatic spitting of the t2 g manifold. We invoke an intermediate coupling approach that incorporates both spin-orbit coupling and electron-electron interactions on an even footing and reveal that the ground state of 5 d3-based compounds, which has remained elusive in previously applied models, is a novel spin-orbit entangled J =3 /2 electronic ground state. This work reveals the hidden diversity of spin-orbit controlled ground states in 5 d systems and introduces a new arena in the search for spin-orbit controlled phases of matter.

  13. Fiscal 1998 R and D project on global environmental industrial technology. Research result report on DNA analysis and information processing technology for photosynthesis microorganisms (Development of CO{sub 2} fixation and effective use technology by using bacteria and algae); 1998 nendo chikyu kankyo sangyo gijutsu kenkyu kaihatsu jigyo. Kogosei biseibutsu nado DNA kaiseki joho shori gijutsu no kenkyu (saikin sorui nado riyo nisanka tanso koteika yuko riyo gijutsu kaihatsu) seika hokokusho



    This report summarizes the fiscal 1998 research result on DNA analysis and information processing technology for photosynthesis microorganisms. On the study on DNA analysis technology by triple-strand formation method, as the comparison study result of a READ method, stable triple- strand formation method and hairpin method, a READ method showed the highest triple-strand formation efficiency for target DNA. On the study on accurate separation technology of specific genes, establishment of protocols was promoted for solid-phase probe technology, subtract technology and leveling technology. On the study on DNA microarray analysis technology by high-efficiency hybridization method, the analysis technology of genes by hybridization method using DNA chips is under investigation. In addition, the high- efficiency analysis technology of specific DNA segments by using an affinity sensor, and the high-accuracy cloning technology for DNA with altered primary structure were also studied. (NEDO)

  14. Research report for fiscal 1997 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology, of which evaluation on weatherability of devices used in residential photovoltaic power generation system; 1997 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka no uchi jutaku you taiyoko hatsuden system kiki no taikosei hyoka



    With the objectives to analyze and evaluate the safety and reliability due to aging of the devices used in the residential photovoltaic power generation system, weatherability tests have been performed on devices used in the residential photovoltaic power generation system by means of exposure. This paper summarizes the achievements in fiscal 1997. In the outdoor exposure tests on multi-crystalline silicon solar cell modules at Choshi City, Miyako Island and the Miyako Island seashore, the output characteristics after the exposure tests showed a result that the insolation intensity and the change in the short circuit current are approximately proportional, and the temperature in the module and the change in the open voltage are inversely proportional. The module characteristics retention rate showed no change in the 29-month exposure at all of the three exposure locations. The insulation resistance in the exposure test specimens have been good at 2,000 M{omega} or more in all the locations until 18 months have elapsed. However, the test specimens in Miyako Island and the Miyako Island seashore showed 99 M{omega} after 23 months, and 129 to 1,774 M{omega} after 29 months. According to the outdoor exposure tests of metal test pieces, noticeable difference was found in corrosion due to difference in the environment by each exposure location, whose order of the corrosion degree was the Miyako Island seashore > Miyako Island > Choshi City. (NEDO)

  15. Research report for fiscal 1996 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology, of which evaluation on weatherability of devices used in residential photovoltaic power generation system; 1996 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka no uchi jutaku you taiyoko hatsuden system kiki no taikosei hyoka



    Weatherability tests have been performed on devices used in the residential photovoltaic power generation system by means of exposure, with the objectives to analyze and evaluate the safety and reliability due to aging of the devices used in the residential photovoltaic power generation system. This paper summarizes the achievements in fiscal 1996. In the outdoor exposure tests on solar cell modules, results of the tests were derived for up to 18 months after the start of the exposure at Choshi City, Miyako Island and the Miyako Island seashore. In the appearance observation, some white rust has appeared in the contact section of the aluminum frames of the solar cell modules and fixing screws, which have been exposed at Miyako Island and the Miyako Island seashore, but no changes that may give influence on the performance of the solar cells have been observed. The results showed performance similar to or slightly inferior to that before the exposure as a whole. The insulation resistances were all found good. According to the result of the outdoor exposure test of metal test pieces, noticeable difference in the corrosion degrees was recognized in the contact corrosion section of the aluminum alloys exposed in three areas having different meteorological and environmental factors. Electroplated zinc was found to have severer pitting corrosion in the contact sections than treatment-free zinc. (NEDO)

  16. Research report for fiscal 1995 on analysis and evaluation of demonstration tests for establishment of residential photovoltaic power generation load leveling technology, of which evaluation on weatherability of devices used in residential photovoltaic power generation system; 1995 nendo kenkyu hokokusho. Jutaku you taiyoko hatsuden fuka heijunka gijutsu tou kakuritsu jissho shiken ni kansuru kaiseki hyoka no uchi jutaku you taiyoko hatsuden system kiki no taikosei hyoka



    Weatherability tests have been performed on devices used in the residential photovoltaic power generation system by means of exposure, with the objectives to analyze and evaluate the safety and reliability due to aging of the devices used in the residential photovoltaic power generation system. This paper summarizes the achievements in fiscal 1995. In the outdoor exposure test on solar cell modules, multi-crystalline silicon solar cell modules were selected as the test specimens, and thermo-couples were embedded in the modules to measure the temperatures. Also for the purpose of comparison, storage test specimens were stored in a constant temperature and humidity chamber. The exposure tests were carried out in three locations of the city of Choshi in Chiba Prefecture, the Miyako Island test site in Okinawa Prefecture, and the Miyako Island seashore. In the measurement and evaluation, appearance observation and measurements of output characteristics and insulation resistance were executed in summer and winter. No noticeable changes were observed in the measurements after lapse of four months and six months. In the outdoor exposure tests of metal test pieces, aluminum alloys were tested for corrosion caused by contact with different kinds of metals. Although the test period was short in the current fiscal year, difference in corrosion degrees in the aluminum alloys was found already in three months. (NEDO)

  17. Chang Kai-shek's “Humanitarian Bombs” and the Mirage Known as the “Manchurian-Mongolian Problem”: New Japanese-Language Perspectives on the Transnational History of Modern East Asia

    Kyu Hyun Kim


    Full Text Available On May 20, 1938, two American-made Chinese airplanes—Martin B-10 monoplane bombers—took off from Ningbo, Fujian province, in the direction of southwestern Japan. Instead of dropping bombs, they released propaganda materials produced by the Nationalist Party (Guomindang, pleading with the industrial workers, farmers, and petty bourgeois citizens of Japan to stop fighting China and resist their militarist government. This “humanitarian bombardment,” masterminded by Chiang Kai-shek, is little known today—perhaps deservedly so, for it had its embarrassing features. For one, the planes never reached the strategically important areas and merely flew over sparsely populated regions of Kumamoto and Miyazaki prefectures. Further, the propaganda materials were either voluntarily turned over to or confiscated by the Japanese authorities almost as soon as they hit the ground. As far as we can tell, the operation had little impact on the Japanese attitude toward China or on the Second Sino-Japanese War (1937–1945... Iechika Ryōko 家近亮子,Shō Kaiseki no gaikō senryaku to Nitchū sensō 蒋介石の外交戦略と日中戦争[Chiang Kai-shek's diplomatic strategies and the Sino-Japanese War]. Tokyo: Iwanami Shoten, 2012. ISBN: 978-4-00-025865-4. Nakami Tatsuo 中見立夫, 'Manmō mondai' no rekishiteki kōzu 満蒙問題の歴史的構図 [The historical composition of the “Manchurian-Mongolian problem”]. Tokyo: Daigaku Shuppankai, 2013. ISBN: 978-4-86-337131-6.

  18. Shadows alter facial expressions of Noh masks.

    Kawai, Nobuyuki; Miyata, Hiromitsu; Nishimura, Ritsuko; Okanoya, Kazuo


    A Noh mask, worn by expert actors during performance on the Japanese traditional Noh drama, conveys various emotional expressions despite its fixed physical properties. How does the mask change its expressions? Shadows change subtly during the actual Noh drama, which plays a key role in creating elusive artistic enchantment. We here describe evidence from two experiments regarding how attached shadows of the Noh masks influence the observers' recognition of the emotional expressions. In Experiment 1, neutral-faced Noh masks having the attached shadows of the happy/sad masks were recognized as bearing happy/sad expressions, respectively. This was true for all four types of masks each of which represented a character differing in sex and age, even though the original characteristics of the masks also greatly influenced the evaluation of emotions. Experiment 2 further revealed that frontal Noh mask images having shadows of upward/downward tilted masks were evaluated as sad/happy, respectively. This was consistent with outcomes from preceding studies using actually tilted Noh mask images. Results from the two experiments concur that purely manipulating attached shadows of the different types of Noh masks significantly alters the emotion recognition. These findings go in line with the mysterious facial expressions observed in Western paintings, such as the elusive qualities of Mona Lisa's smile. They also agree with the aesthetic principle of Japanese traditional art "yugen (profound grace and subtlety)", which highly appreciates subtle emotional expressions in the darkness.

  19. Shadows alter facial expressions of Noh masks.

    Nobuyuki Kawai

    Full Text Available BACKGROUND: A Noh mask, worn by expert actors during performance on the Japanese traditional Noh drama, conveys various emotional expressions despite its fixed physical properties. How does the mask change its expressions? Shadows change subtly during the actual Noh drama, which plays a key role in creating elusive artistic enchantment. We here describe evidence from two experiments regarding how attached shadows of the Noh masks influence the observers' recognition of the emotional expressions. METHODOLOGY/PRINCIPAL FINDINGS: In Experiment 1, neutral-faced Noh masks having the attached shadows of the happy/sad masks were recognized as bearing happy/sad expressions, respectively. This was true for all four types of masks each of which represented a character differing in sex and age, even though the original characteristics of the masks also greatly influenced the evaluation of emotions. Experiment 2 further revealed that frontal Noh mask images having shadows of upward/downward tilted masks were evaluated as sad/happy, respectively. This was consistent with outcomes from preceding studies using actually tilted Noh mask images. CONCLUSIONS/SIGNIFICANCE: Results from the two experiments concur that purely manipulating attached shadows of the different types of Noh masks significantly alters the emotion recognition. These findings go in line with the mysterious facial expressions observed in Western paintings, such as the elusive qualities of Mona Lisa's smile. They also agree with the aesthetic principle of Japanese traditional art "yugen (profound grace and subtlety", which highly appreciates subtle emotional expressions in the darkness.

  20. Shadows Alter Facial Expressions of Noh Masks

    Kawai, Nobuyuki; Miyata, Hiromitsu; Nishimura, Ritsuko; Okanoya, Kazuo


    Background A Noh mask, worn by expert actors during performance on the Japanese traditional Noh drama, conveys various emotional expressions despite its fixed physical properties. How does the mask change its expressions? Shadows change subtly during the actual Noh drama, which plays a key role in creating elusive artistic enchantment. We here describe evidence from two experiments regarding how attached shadows of the Noh masks influence the observers’ recognition of the emotional expressions. Methodology/Principal Findings In Experiment 1, neutral-faced Noh masks having the attached shadows of the happy/sad masks were recognized as bearing happy/sad expressions, respectively. This was true for all four types of masks each of which represented a character differing in sex and age, even though the original characteristics of the masks also greatly influenced the evaluation of emotions. Experiment 2 further revealed that frontal Noh mask images having shadows of upward/downward tilted masks were evaluated as sad/happy, respectively. This was consistent with outcomes from preceding studies using actually tilted Noh mask images. Conclusions/Significance Results from the two experiments concur that purely manipulating attached shadows of the different types of Noh masks significantly alters the emotion recognition. These findings go in line with the mysterious facial expressions observed in Western paintings, such as the elusive qualities of Mona Lisa’s smile. They also agree with the aesthetic principle of Japanese traditional art “yugen (profound grace and subtlety)”, which highly appreciates subtle emotional expressions in the darkness. PMID:23940748