Sample records for hiro jumyo suitei

  1. Fatigue life estimation of welded joints of an aluminium alloy under superimposed random load waves (follow-up report). Effects of high frequency components; Jujo random kajuka ni okeru aluminium gokin yosetsu tsugite no hiro jumyo suitei (zokuho). Koshuha seibun no eikyo

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    Takahashi, I.; Maenaka, H.; Takada, A. [Ship Research Inst., Tokyo (Japan)


    In order to examine fatigue behavior of boxing welded joints of anticorrosion aluminum A 5083 P-O alloy, the residual stress measurements, static loading tests, elastic finite element analyses, constant amplitude fatigue tests, and random fatigue tests were conducted. For a load wave in the random loading fatigue tests, a direct current component, a zero-mean narrow band random process, and a high frequency component were combined and superimposed, to examine the effect of the high frequency component and the effect of the stress cycle count method and the mean stress correction on the life estimation. For the fatigue analysis, a reference stress, such as that considering the structural stress concentration, was proved effective in reducing the amount of scattering in the fatigue test results and in improving the life estimation accuracy. Accordingly, for the actual scale measurements, it is insufficient only to measure the stress at points far from the crack initiation place. It is required to analyze the fatigue by measuring the reference stress same as the basic data acquisition tests in the laboratory. 4 refs., 21 figs., 4 tabs.

  2. Consideration on corrosion fatigue crack life assessment; Fushoku hiro kiretsu hassei jumyo hyoka ni kansuru ichikosatsu

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    Yajima, H.; Yamamoto, M.; Saito, T. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering; Morita, K. [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)


    Discussions were given on corrosion fatigue crack life by using corrosion fatigue crack initiation test and analysis. The test used 13Cr-based stainless steel as a test material, and aquamarine at 60{degree}C as a corrosion environment. The fatigue test was performed under a tension loading condition with a stress ratio of 0.1 and an iterative velocity of 1.7 Hz by using a 10-tonf fatigue testing machine. In the corrosion fatigue crack initiation test, a pit has been generated on a boundary of an exposed part and a painted part for masking, hence direct observation was impossible on pit growth behavior. Therefore, an intrinsic crack model was introduced from pit dimensions as observed from a fracture face, and analysis was made on corrosion fatigue crack growth by using the linear fracture dynamics, wherein clarification was made on a phenomenon occurring after the crack growth passes the pit growth until the test piece is fractured. A proposal was made to define the time when fatigue crack initiates and grows from the bottom of a pit as a result of surpassing the growth of corrosion pit as the corrosion fatigue crack life. 4 refs., 7 figs., 1 tab.

  3. Fatigue of cable anchorage of large cable stayed bridge; Daikibo shachokyo cable teichaku kozo no hiro

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    Endo, T.; Matsumoto, T. [Honshu-Shikoku Bridge Authority, Tokyo (Japan); Tsukahara, H. [Yokogawa Bridge Corp., Tokyo (Japan); Miki, C. [Tokyo Institute of Technology, Tokyo (Japan)


    Design considerations such as design schemes, the assemblage and welding of steel plates, and safety for fatigue of welded connections have to be taken for the cable anchorages of the steel cable stayed bridges. In this study, two full scale models, which have different shape of box anchorages welded to the web of the main girder, were made to investigate fatigue characteristics as well as assemblage of plate and gelding details. Finite element analyses for both test models and actual bridges here carried out to compare stress distribution. It was confirmed that the assemblage and welding of both types of box anchorage were attainable kith required quality and accuracy. According to the fatigue test, fatigue cracks originated from the weldings of the bearing plate to which the load from cable socket applied directly were caused by out-of-plane bending of the bearing plate. It was proved that the slight modifications of the details around the bearing plate resulted in sufficient fatigue strength in both types of anchorage. 1 ref., 23 figs., 2 tabs.

  4. Liver Full Reference Set Application: Hiro Yamada - Wako (2011) — EDRN Public Portal (United States)

    Wako has received new 510(k) clearance for Lens culinaris agglutinin-reactive fraction of alpha-fetoprotein (AFP-L3) and Des-gamma-carboxy prothrombin (DCP) tests on an innovative μTASWako i30 analyzer from FDA. The AFP-L3 and DCP assayed on an older platform LiBASys have been cleared with indication of use for risk assessment of hepatocellular carcinoma (HCC) in patient at risk for the liver malignancy. Wako believes that early detection of HCC is critical for improving HCC patient outcome. Therefore, Wako is currently seeking collaborative opportunities to retrospectively measure clinical samples using the AFP-L3 and DCP for further determining of effectiveness of the HCC biomarkers in early detection which are collected prospectively during HCC surveillance. The Reference Sample Set in the EDRN biorepository are well characterized and studied. Access to these samples would allow Wako to quickly determine the clinical effectiveness of AFP-L3 and DCP in detecting early HCC

  5. Estimation of fracture aperture using simulation technique; Simulation wo mochiita fracture kaiko haba no suitei

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    Kikuchi, T. [Geological Survey of Japan, Tsukuba (Japan); Abe, M. [Tohoku University, Sendai (Japan). Faculty of Engineering


    Characteristics of amplitude variation around fractures have been investigated using simulation technique in the case changing the fracture aperture. Four models were used. The model-1 was a fracture model having a horizontal fracture at Z=0. For the model-2, the fracture was replaced by a group of small fractures. The model-3 had an extended borehole diameter at Z=0 in a shape of wedge. The model-4 had a low velocity layer at Z=0. The maximum amplitude was compared each other for each depth and for each model. For the model-1, the amplitude became larger at the depth of the fracture, and became smaller above the fracture. For the model-2, when the cross width D increased to 4 cm, the amplitude approached to that of the model-1. For the model-3 having extended borehole diameter, when the extension of borehole diameter ranged between 1 cm and 2 cm, the change of amplitude was hardly observed above and below the fracture. However, when the extension of borehole diameter was 4 cm, the amplitude became smaller above the extension part of borehole. 3 refs., 4 figs., 1 tab.

  6. Consideration on fatigue strength of corroded steel plates; Fushoku suimo koban no hiro kyodo ni kansuru ichikosatsu

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    Iwata, M.; Yajima, H.; Yamamoto, M.; Saito, T. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering


    Discussions were given on fatigue strength of corroded steel plates taken from a hull of a ship seventeen years old after construction. The steel plates have had their original thickness of 13 mm reduced to 5.3 to 8.3 mm. After having been cut by a machine, the steel plates were used for tests as ground plates after going through grinding and as corroded plates with rust remaining on them. The fatigue test was performed in artificially made sea water at a temperature of 25{degree}C and in air with axial power pulsating tensile load and at iterative loading velocities of 3 to 5 Hz. The corroded material test verified that corrosion pits exist innumerably on the test piece surface and fatigue cracks have been developed and grown from bottoms of the pits. The stress concentration coefficient of the corrosion pits was about 1.9. Good agreement with the test result was found in the S-N chart in which the number of iteration of fracture was regarded as the number of iteratively generated cracks, and notch coefficient was estimated as 1.9. These results proved that the fatigue strength assessing method for virgin materials can be applied also to steel plates which have been exposed to corrosive environment for extended periods of time. 5 refs., 7 figs., 1 tab.

  7. Fatigue testing system and result of long-term operation. Goku teion hiro shiken sochi to unten kekka

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    Yuri, T.; Nagai, K.; Ogata, T.; Umezawa, O.; Ishikawa, K. (National Research Institute for Metals, Tsukuba (Japan))


    Specification and test result were explained of/by cryogenic temperature fatigue tester using liquid helium. Form the viewpoint of preventing helium gas from polluting, adoption therein was made of cryogenic temperature system to cool the test specimen and recondensation/refrigeration system, separated from the refrigerator. Helium gas could be therefore liquefied and reutilized, having evaporated by invasion of heat generated from the test specimen and heat taken in from the outside during the fatigue test. The maximum load of that tester is dynamically {plus minus} 5ton and statically {plus minus} 7.5ton. The fatigue test could be conducted during many hours at liquid helium temperature without liquid helium replenished from the outside and restarted in about ore hour, as the required time was shortened to change test specimens. Rated operation can be started in about six hours after the operational start of refrigeration and continued during more than 1000h. The number of operational hours attained to 5500 in seven years so that the recondensation/refrigeration system was demonstrated to be effective. 10 refs., 9 figs., 2 tabs.

  8. Effects of films corroded in fatigue of single copper crystals. Dotankessho no hiro ni okeru fushoku himaku no eikyo

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    Tsuji, I.; Miyamoto, H.; Omaki, T. (Doshisha Univ., Kyoto (Japan)); Hashimoto, T. (Kyoto University, Kyoto (Japan))


    A fatigue test was performed on single copper crystals having a single slide system to discuss effects of corroded films on fatigue behavior of the crystals. The experiment used single crystals fabricated from high-purity copper poly-crystals by using the Bridgman method. Crystalline azimuth of the single crystals was analyzed and controlled by using the X-ray rear reflection Laue method. Sodium nitrite aqueous solution was used as a corroding solution. The fatigue test performed repetitive compression/tensile tests under constant plasticity strain amplitude after corrosive films are generated all over a test piece. The test was terminated when cracks developed causing stress to decrease largely. The following conclusions were obtained as a result of the discussions: hardening rate increases during the initial stage of hardening under presence of the corrosive films; no accelerated formation of PSBs occurs under high plasticity strain amplitude, but it occurs under low plasticity strain amplitude; and shape and change in displacement-corrosion current loop under the presence of the corrosive films can be explained by combining several kinds of current increase models. 3 refs., 5 figs., 1 tab.

  9. Application of monolithic lining to tundish and extension of tundish life with improvement of refractories; Tandeisshu futeiseika to taikabutsu kaizen ni yoru jumyo kojo

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    Mori, Eiichiro; Fujta, Takashi; Tanikawa, Kanji [Kobe Steel Corp., Hyogo (Japan)


    As a part of realization of monolithic liming of a tundish lining refractory, a study on 2CC and 3CC tundish monolithic refractories was carried out to improve placing efficiency and extend its life. Main inspection points were set on (1) casting facility specifications and (2) structure and material. A force feeding pump system with a high degree of freedom for placing layout was selected. It was judged preferable than a hopper dolly type ladle repair facility in the degree of freedom for a placing site and facility expenses, though little inferior at maintenance. A force feeding pump is combined with a boom to enable the facility to cast for plural objects. Low expansion and creep properties were given to the refractory by reviewing the addition of the expansive material and the structure was improved by setting anchor blocks at corner parts. The cost of refractories was reduced and labor saving of refractory placing workers was achieved by widely extending the life. (NEDO)

  10. Residual lifetime estimation by the mixture Weibull-power-law model; Kongo Weibull bekijosoku wo mochiita yojumyo suitei

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    Hirose, H. [Hiroshima City University, Hiroshima (Japan); Toya, A. [Tokyo Electric Power Co. Inc., Tokyo (Japan); Nakagawa, S. [Kansai Electric Power Co. Inc., Osaka (Japan); Uchida, K. [Chubu Electric Power Co. Inc., Nagoya (Japan)


    A new statistical estimation method of the lifetime of the insulation which had been used for a long period by using the probabilistic mixture model of the Weibull-power-law is shown in this paper. The cross-linked polyethylene insulated cables which are used under the ground are considered to be deteriorate at various rates in accordance with their stress circumstances. Such a phenomenon leads us to propose the mixture model. This method can be applied to the residual lifetime estimation of the removed cables which had been used under the specified service voltage stress for a long period. For example, the parameters and the residual lifetime estimates are obtained for 22 kV and 33 kV cables which had been used for decades by classifying the whole samples into four groups. The estimated deterioration rates totally differ from those obtained by the conventional accelerated life tests. 17 refs., 11 figs., 3 tabs.

  11. Fatigue crack growth behavior of large crack in silicon nitride. Nagai kiretsu wo yusuru chikka keiso no hiro kiretsu shinten kyodo

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    Ogasawara, T. (Nissan Motor Co. Ltd., Tokyo (Japan). Nissan Research Center); Yasuda, E. (Tokyo Inst. of Technology, Tokyo (Japan). Research Lab. of Engineering Materials)


    The data needed in the prosecution of a lifetime-presupposition can be obtained from the test of fatigue crack growth employing the breaking mechanics specimens as one of the general estimating methods for metals. Additionally, the fatigue crack growth test is also effective for the purpose of examining the fatigue mechanism of materials. In this study, the test on the fatigue crack growth in the silicon nitride sintered under atmospheric pressure is executed by using CT specimens, and the experiments relating to the influence of the loading history upon the fatigue crack growth behavior in silicon nitride are carried out by changing the maximum stress intensity factor (K[sub Imax]) in stages. Further, the fatigue growth behaviors under cyclic loading are examined based on the experimental results obtained therefrom under a premise that the mechanism of highly-toughening of silicon nitride is, mainly, the grain bridging. The results thereof substantiate that the mechanism of the crack growth in silicon nitride under cyclic loading is that the crack growth under static loading is accelerated by the fretting failure in the grain bridging area. 23 refs., 11 figs.

  12. Study on three-dimentionally stressed fatigue of NB/SBR blended rubber. NR/SBR blend gomu no sanzigen oryoku hiro ni kansuru kenkyu

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    Fujimoto, K.; Imura, Y. (Shibaura Inst. of Technology Tokyo (Japan). Faculty of Engineering)


    The purpose of this study is to investigate fatigue processes, fatigue life times and fatigue fracture patterns by three-dimentional stresses on carbon black filled blended rubbers of solution-polymerized SBR and SBR{sup *} modified at the end of SBR polymer chains by functional groups with NR. In the experiment, specimens consisting of 7 kinds of NR/SBR{sup *} blended rubber and 3 kinds of NR/SBR blended rubber were put to the three-dimentional stresses test. The average value of physical properties as well as characteristic values of anisotropy and fatigue fractures were measured. As a result, the following conclusions have been derived: In rubber phases of NR and SBR,or SBR{sup *}, compatible structures were formed by polymer chains of NR and SBR(SBR{sup *}) at their boundaries and they became obstacles to the propagations of micro-cracks generated by fatigue. Fracture patterns were controlled by velocities of a formation process of anisotropic layer structures and a generation process of surface cracks. Fractures grew in lateral direction in NR system,because the formation of anisotropic layer structures was faster. Fractures grew in radial direction in blended rubber systems,because the formation of surface cracks was faster. 6 refs., 26 figs., 2 tabs.

  13. Temperature effect on corrosion fatigue strength of coated ship structural steel; Zosen`yoko tosozai no fushoku hiro kyodo ni okeru ondo no eikyo

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    Takanashi, M.; Fuji, A.; Kojima, M.; Kitagawa, M. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan); Kobayashi, Y. [Ship Research Inst., Tokyo (Japan); Kumakura, Y.


    The corrosion fatigue life was obtained using uncoated and tar epoxy resin specimens to clarify the temperature effect. The life curve for corrosion fatigue of machined and uncoated steel in the air and sea was obtained. The fatigue strength of uncoated steel largely decreases in the sea and breaks even in the nominal stress range of less than 1/2 of the fatigue limit in the air. The effect of temperature on the coated steel is represented by a corrosion coefficient. The steel coated at 25{degree}C is 1/1.03 to 1/1.13 at 40 to 60{degree}C. This showed that the fatigue strength decreases when the temperature exceeds 25{degree}C. However, it has not such tendency and significance that are represented quantitatively. There is a slight difference in the short-life area between the crack generation life and breaking life. However, the long-life area has no significance that influences the whole evaluation. In the long-life corrosion fatigue, the crack occurs from the corrosion pit due to the exposure below the coated film and progresses in the base material before the coated film is destroyed. The effect of the corrosion pit remarkably appears at a low-stress level. 14 refs., 14 figs., 4 tabs.

  14. Evaluation of fatigue crack growth characteristics of WC-Co cemented carbides; WC-Co choko gokin no hiro kiretsu shinten tokusei no hyoka

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    Hirose, Y.; Boo, M. [Kanazawa University, Ishikawa (Japan). Faculty of Science; Kishi, Y. [Nippon Institute of Technology, Saitama (Japan); Park, Y. [Dong-A University, Pusan (Korea, Republic of)


    The fatigue crack growth tests of WC-Co Cemented Carbides were carried out in a wide range of fatigue crack growth rate covering the threshold stress intensity factor range {Delta} Kth. The effects of the stress ratio, Co volume fraction and the phase transformation of Co on the fatigue crack growth characteristics were investigated on the basis of fracture mechanics and fractography. The crack growth rate was measured using 3-point bending specimens. Crack growth tests were carried out at 10 HZ and the stress ratio R=0.1 and 0.5. The main results obtained are as follows; (1) The Paris rule can be applied between da/dN and{Delta}K and it is shown to be da/dN=C({Delta}K){sup m}. (2) The fractography of the fracture surface, shows that brittle fracture occurs in the Co binder phase at the stress rate R = 0.1 but ductile fracture occurs in the Co binder phase at R= 0.5. (3) The relation of da/dn-{Delta}Keff / E of WC-Co cemented carbides shows the characteristic in the middle of the other metals and the alumina ceramics. (4) The Co binder phase undergoes phase transformation by repeated deformation and so it affects the characteristics delicately. 22 refs., 9 figs., 3 tabs.

  15. Feasibility design of a floating airport and estimation of environmental forces on it; Futaishiki kuko no sekkei to kankyo gairyoku no suitei ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Inoue, Y.; Tabeta, S.; Takei, Y. [Yokohama National University, Yokohama (Japan). Faculty of Engineering


    A rough design was performed on a floating airport. On this floating structure, environmental external force was estimated, mooring design was carried out, and discussions was given on the position retaining performance important for airport functions and behavior of the floating structure. The discussion was given on cases that the airport is surrounded and not surrounded by floating breakwaters. A floating structure which becomes super-large in size requires considerations on force due to sea level gradient as a result of a tide. Deriving flow condition changes and force acting on the floating structure simultaneously by using numerical calculations makes it possible to estimate current force given with considerations on influence of the flow conditions created by installing the floating airport. Estimation was carried out by using a zone dividing method on wave drifting force acting upon the floating airport. As a result, it was found that installing floating and permeating type breakwaters can reduce the wave drifting force acting on the floating airport. The wave drifting force working on the floating airport can be reduced by installing the floating and permeating type breakwaters to lower levels than when no such breakwaters are installed. The airport may be moored with less number of fenders when the fenders of the same type are used. 18 refs., 10 figs., 5 tabs.

  16. Estimation of performance of a high-speed boat by using the Rankine source method; Kosokutei no rankinsosuho ni yoru seino suitei ni tsuite

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    Eguchi, T. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)


    This paper describes estimation of performance of a high-speed boat by using the Rankine source method. An orthogonal coordinate system is considered, which uses the center of a hull as the zero point, and is made dimensionless by using the hull length. The catamaran boat or the single hull boat being the subject of the discussion is supposed to have a transom stern, and to be sailing at a constant speed in the -X direction. A governing equation and a border condition were formulated using disturbance speed potential and X-direction speed differentiation. An inverse specular image was employed as a specular image system upon considering attitude change in the high-speed boat. As to the division of hull surface, the portions protruded above the static water surface were cut off from among the panel data of boat CAD. Considering a high speed condition in which the water surface is completely separated at the transom section, the water level at the transom section was supposed to be at the same height as at the rear end of the hull. Blow-out intensity at the water surface was derived in such a way that a CAD panel of the rear end of the hull is searched and wave height agrees with the height of the transom in the Z direction. A resistance curve may be obtained easily by using a personal computer. 4 refs., 8 figs.

  17. Study on estimating fluid force acting on a hull during maneuvering movement; Soju undoji no sentai ni sayosuru ryutairyoku no suitei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yukawa, K.; Kijima, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    With types of general cargo vessel and VLCC vessel as the object of discussion, a method was discussed to estimate fluid force acting theoretically on a hull during maneuvering movement, taking frame line shape into consideration. A vortex model was improved by giving consideration of time-based decay on intensity of discrete vortex lines based on the Rankine vortex. Modeling of flow fields around a hull was attempted to deal with movements in which width and draft are small as compared with the ship length, and turning angle speed and deviation angle are small. It was assumed that the ship speed is slow and effects of waves can be disregarded. Specular images of the hull were taken with regard to free surface, and handled as a double body model. Speed potential to express flow fields around a hull is required to satisfy the following five boundary conditions of Laplace, substance surface, free vortex layers, infinity and exfoliation. The potential may be handled as a two-dimensional problem in a field near the hull by using assumption of a slender and long body and conformal mapping. It was found possible to estimate hull fluid force with relatively good accuracy. Fine linear coefficients derived from the estimation were used to have performed highly accurate determination on course stabilization. 5 refs., 6 figs., 2 tabs.

  18. Clearness index in cloudy days estimated with meteorological information by multiple regression analysis; Kisho joho wo riyoshita kaiki bunseki ni yoru dontenbi no seiten shisu no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Nakagawa, S. [Maizuru National College of Technology, Kyoto (Japan); Kenmoku, Y.; Sakakibara, T. [Toyohashi University of Technology, Aichi (Japan); Kawamoto, T. [Shizuoka University, Shizuoka (Japan). Faculty of Engineering


    Study is under way for a more accurate solar radiation quantity prediction for the enhancement of solar energy utilization efficiency. Utilizing the technique of roughly estimating the day`s clearness index from forecast weather, the forecast weather (constituted of weather conditions such as `clear,` `cloudy,` etc., and adverbs or adjectives such as `afterward,` `temporary,` and `intermittent`) has been quantified relative to the clearness index. This index is named the `weather index` for the purpose of this article. The error high in rate in the weather index relates to cloudy days, which means a weather index falling in 0.2-0.5. It has also been found that there is a high correlation between the clearness index and the north-south wind direction component. A multiple regression analysis has been carried out, under the circumstances, for the estimation of clearness index from the maximum temperature and the north-south wind direction component. As compared with estimation of the clearness index on the basis only of the weather index, estimation using the weather index and maximum temperature achieves a 3% improvement throughout the year. It has also been learned that estimation by use of the weather index and north-south wind direction component enables a 2% improvement for summer and a 5% or higher improvement for winter. 2 refs., 6 figs., 4 tabs.

  19. Estimation of bainite transformation temperatures in steels by the empirical formulas; Hagane no bainite hentai ondo no jikkenshiki ni yoru suitei

    Energy Technology Data Exchange (ETDEWEB)

    Okada, Y. [Sumitomo Metal Industries, Ltd., Osaka (Japan); Kunitake, T.


    Relational formulas were proposed for bainite transformation temperatures and chemical compositions in steels. Thirty-one isothermal transformation charts were selected, whose forms are such that transformation regions in both of pearlite stage and bainite stage are separated, and bainite transformation starting temperature reaches a constant value on the longer duration side in isothermal retention. Multiplex analysis was performed on the charts. Then, an experimental formula was presented to derive the bainite transformation temperature from chemical compositions of the steels. An assessed value very close to the measured value was derived. Another experimental formula was presented to estimate the bainite transformation temperature from the chemical compositions of the steels during continuous cooling, which is more practicable than isothermal transformation in heat treatment of the steels. Two kinds of parameters, B {sub 1} and B {sub 2} were introduced into the formula. The parameter B {sub 1} is a bainite transformation starting temperature in the case when cooling is performed at a critical cooling rate in which the pearlite transformation can appear, and B {sub 2} is a bainite transformation starting temperature when cooling is performed at such a critical cooling rate that a structure containing bainite is transformed completely to a pearlite transformed structure. A formula more versatile than conventional formulas was obtained. 9 refs., 5 figs., 8 tabs.

  20. Estimation of propagation paths of love-waves by means of the ray tracing method. Hasen tsuisekiho ni yoru Love ha denpa keiro no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Koyama, S. (Building Research Inst., Tokyo (Japan)); Seo, K.; Samano, T. (Tokyo Inst. of Technology, Tokyo (Japan). Graduate School)


    A structure of the basic natural period of which is in the relatively long period zone from several seconds to about fifteen seconds or so such as a super multistoried building or a very long bridge has been constructed, but evaluation of a slightly long period earthquake motion becomes necessary in order to secure antiseismic safety of these structures. The main wave composing this earthquake motion is considered to be a surface wave reflecting the subterranean structure up to the upper part of the earth crust, the duration of the earthquake motion is considerably longer than its body wave and the above structure whose basic natural period coincides with the earthquake motion period shows the increase of its amplitude due to resonance. In this study, the prediction of propagation paths of Love-waves composing the slightly long period earthquake motion has been tried by the ray tracing method. When ray tracing was applied from the epicenter of the earthquake in the western part of Nagano prefecture in 1984, two paths of Love-waves reaching Kumagaya were confirmed and it was considered that one of them corresponded with the main motion and the succeeding phase. Adversely when ray tracing was applied to all directions from Kumagaya, the waves were propagated to two areas showing the possibility of generation of an earthquake. 29 refs., 10 figs.

  1. Estimation for origin of coals on biomaker analysis; Jinko sekitan oyobi tennen sekitan no biomaker bunseki ni yoru sekitan kigen busshitsu no suitei

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    Suzuki, Y. [Geological Survey of Japan, Tsukuba (Japan); Sugimoto, Y. [National Institute of Materials and Chemical Research, Tsukuba (Japan); Okada, K. [Coal Mining Research Center, Tokyo (Japan)


    In order to study coal production processes, an estimation study was carried out on coal originating materials by using biomaker analysis. Test samples are original coals collected directly from a mine in Hokkaido (not having been subjected cleaning). Mixing and solvent extraction were performed after pulverization, and then tests were given on saturated hydrocarbon components divided by using a silicagel column chromatograph for the present study. It can be known from n-alkane distribution in the coal that low molecular alkane increases with increasing degree of coalification. Artificial coal made by wet-heating Metasequoia leaves contains only little n-alkane. Diterpenoid compound exists in the Taiheiyo and Akabira coals. Tetra-cyclic diterpernoid is contained abundantly in subtropical coniferous trees, serving as a parameter for warm environment. The compound is contained also in the Fushun coal, but not in Indonesian coals. Hopanoid constitution shows very high similarity, but H/C atomic ratio may vary largely even if the coalification is at the same degree. This is likely to be caused from difference in originating materials. Hopanoids are bacteria attributed substances, whose activities are not affected by the originating materials. 2 figs., 1 tab.

  2. An Investigation into Islamic Fundamentalism and an Assessment of Its Relationship with the Concept of Jihad (United States)


    armies were fortunate to harness the abilities of two inspired generals: Khalid ibn al-Walid and Amr ibn al-Aas. 2 But these factors would 20 have been...against the Byzantines and Persians. Amr ibn al- Aas was the conqueror of Egypt and part of North Africa. 3 ’Allahu Akbar’ literally means ’God is...21 Ibid, p.76. 22 Hiro, p.60. 23 Ibid, p.66. 24 Ibid, p.67. 25 Gomaa , p.146. 26 Hiro, p.68. 27 Gomaa , p.147. 28 Hiro, p.75. 29 Gomaa , p.147. 30 Hiro, p

  3. Positron lifetime measurements and positron-annihilation induced auger electron spectroscpy using slow positron beams; Teisoku yodenshi bimu wo mochiita yodenshi jumyo sokutei oyobi yodenshi shometsu reiki oje denshi bunko

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    Suzuki, R. [Electrotechnical Lab., Tsukuba (Japan)


    Slow positron beam with less than several eV can be controlled freely such as accelerating, throttling the beam size, shortening the pulse or making pulse with short time width and so forth. These low positron beams are applied to various measurements like Doppler broadening measurement of annihilation {gamma} rays or lifetime measurement of positron, and secondary particle measurements using positron microscope, positron electron ray diffraction, flight time method and so forth. In particular, these recent years, high intensity slow positron beams were possible using accelerators like electron linac and its application is increasing. In this report, pulse shortening method for high intensity slow positron beam, and incidence energy variable positron lifetime measurement method using this slow pulsed beam and flight time type positron-annihilation-induced auger electron spectroscopy are outlined. In future, these measurements can be possible to carry out with high resolution and also with high counting rate if higher intensity monochromatic excellent positron beam than present one is produced. 31 refs., 5 figs.

  4. Pearl Harbor and Hiroshima : an Ironic Comparison = Pearl Harbor ve Hiroşima Saldırilarının İronik bir Karşılaştırılması

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    Leo J. MAHONEY


    Full Text Available In the past century, veterans of America's wars have shown extraordinary human longevity in the postwar eras. As a result, contemporary public historical interpretations of the American second world war experience have been influenced by veterans' perceptions of historical issues for a longer time than was true of postwar eras before the twentieth centuıy. Public historical debates in the United States have recently focused on the Japanese attack on Pearl Harbor (1941 and the American attacks on Hiroshima and Nagasaki (1945. These events may seem quite dated by now, but they have remarkable contemporary resonance in light of debates over proliferation of nuclear weapons and tactics of so-called pre-emptive warfare. Though the aerial attacks are often related in popular American perception, the truth is they were incommensurate events in terms of their military and political objectives, their physical scale and results, and the natures of their targets.

  5. Influence on driver fatigue of vertical vibrations over long distances. Assessment in terms of stress hormones; Driver no unten hiro ni okeru joge shindo no eikyo. Stress hormone wo shiyo to shite

    Energy Technology Data Exchange (ETDEWEB)

    Taguchi, T.; Inagaki, H. [Toyota Central Research and Development Labs., Inc., Aichi (Japan)


    Driving tests are conducted to obtain some indexes that describe the cumulative effect of the sense of tiredness. The heart rate, Mayer wave related sinus arrhythmia, respiratory sinus arrhythmia, urinary adrenaline, noradrenaline, and cortisol in saliva are tested. Adrenaline and Mayer wave related sinus arrhythmia are ultimately named in view of their correlation with tiredness. It is believed that tiredness is attributable to two factors, which are increase in mental stress and decrease in vigilance. An excitation test is then conducted using a motion simulator. Upon application of 4Hz vibrations (equivalent to the chest section resonance frequency), adrenaline increases sharply, and then decreases sharply upon termination of excitation. Upon application of 1.6Hz vibrations (equivalent to the head section resonance frequency), adrenaline increases but not sharply, and the elevated level is sustained for some time after excitation. Driving tests are next conducted using a vehicle with its suspension fixed and another with 1-2Hz vibrations reduced. Rise in the adrenaline level is found inhibited aboard the latter. No difference is detected in terms of Mayer wave related sinus arrhythmia between the two vehicles. 4 refs., 7 figs., 4 tabs.

  6. Estimation of subsurface structures in a Minami Noshiro 3D seismic survey region by seismic-array observations of microtremors; Minami Noshiro sanjigen jishin tansa kuikinai no hyoso kozo ni tsuite. Bido no array kansoku ni yoru suitei

    Energy Technology Data Exchange (ETDEWEB)

    Okada, H.; Ling, S.; Ishikawa, K. [Hokkaido University, Sapporo (Japan); Tsuburaya, Y.; Minegishi, M. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    Japan National Oil Corporation Technology Research Center has carried out experiments on the three-dimensional seismic survey method which is regarded as an effective means for petroleum exploration. The experiments were conducted at the Minami Noshiro area in Akita Prefecture. Seismometer arrays were developed in radii of 30 to 300 m at seven points in the three-dimensional seismic exploration region to observe microtremors. The purpose is to estimate S-wave velocities from the ground surface to the foundation by using surface waves included in microtremors. Estimation of the surface bed structure is also included in the purpose since this is indispensable in seismic exploration using the reflection method. This paper reports results of the microtremor observations and the estimation on S-wave velocities (microtremor exploration). One or two kinds of arrays with different sizes composed of seven observation points per area were developed to observe microtremors independently. The important point in the result obtained in the present experiments is that a low velocity bed suggesting existence of faults was estimated. It will be necessary to repeat experiments and observations in the future to verify whether this microtremor exploration method has that much of exploration capability. For the time being, however, interest is addressed to considerations on comparison with the result of 3D experiments using the reflection method. 4 refs., 7 figs.

  7. Estimation of underground structures in the Osaka-Kobe area by array-network observations of microtremors; Bido no array kansoku ni yoru Osaka-Hyogo chiiki no chika kozo no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Okada, H.; Ishikawa, K.; Ling, S. [Hokkaido University, Sapporo (Japan); Sasabe, K. [Ministry of Construction, Tokyo (Japan)


    Microtremor observations have been carried out with an objective to estimate underground structures including the foundation depth in the Osaka-Kobe area which has been greatly damaged by the Hyogoken-nanbu earthquake in 1995. Different organizations have made seismic surveys and boring investigations in this area, by which elucidation has been made on the underground structures. The present observations are intended to identify S-wave velocity distribution in a wide area from the ground surface to the foundation, which is difficult to be verified by using conventional surveys and investigations. Methods to detect surface waves which are contained in microtremors include the frequency-wave number method (the F-K method) and the spatial autocorrelation method (the SPAC method). The SPAC method can estimate phase velocities of longer waves for the size of an array than with the F-K method, and is more advantageous in estimating ground structures at greater depths. S-wave velocity structure was estimated down to the foundation rocks existing in depths of about 0.5 to 2.0 km. For estimating the phase velocities in Raleigh waves, the SPAC method and the expanded spatial autocorrelation method were used. The underground structures thus derived showed a good agreement with the results of explorations using other methods. 8 figs., 1 tab.

  8. Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Kai, H.; Ikehata, M.; Sakai, S. [Yokohama National University, Yokohama (Japan). Faculty of Engineering


    This is basically a technique wherein the wing element method is replaced by a surface vortex lattice method. A horseshoe vortex of unknown intensity and source surface of known intensity are distributed on the wing surface and, under conditions that the fluid will not cross the boundary, the intensity of horseshoe vortex circulation is calculated for the solution of the fluid field. For the simulation of a real ship in navigation, the required propeller revolution thrust is determined using the real ship resistance value and real ship thrust reduction factor estimated from a model ship resistance test by extrapolation. The calculation of propeller performance is conducted in the quasi-steady condition using the force of fluid working on one wing for each wing angle (with the wing rotated at the increment of 6 degrees), and the thrust and torque are determined using the averages of values obtained in one cycle. It is found that the torque value is overestimated in a considerable degree in the wing element theory. In the surface vortex lattice method, both thrust and torque values agree with experimental values mostly, and this method is found to be accurate enough as a navigation element calculation tool when many panels are considered. 4 refs., 5 figs., 1 tab.

  9. Estimation of spectral solar radiation based on global insolation and characteristics of spectral solar radiation on a tilt surface; Zenten nissharyo ni motozuku zenten nissha supekutoru no suitei to keishamen bunko tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Baba, H.; Kanayama, K.; Endo, N.; Koromohara, K.; Takayama, H. [Kitami Institute of Technology, Hokkaido (Japan)


    Use of global insolation for estimating the corresponding spectral distribution is proposed. Measurements of global insolation spectrum throughout a year were compiled for clear days and cloudy days, ranked by 100W/m{sup 2}, for the clarification of spectral distribution. Global insolation quantity for a clear day was subject mainly to sun elevation. The global insolation spectral distribution with the sun elevation not lower than 15{degree} was similar to Bird`s model. Under the cloudy sky, energy density was lower in the region of wavelengths longer than the peak wavelength of 0.46{mu}m, and the distribution curve was sharper than that under the clear sky. Values given by Bird`s model were larger than measured values in the wavelength range of 0.6-1.8{mu}m, which was attributed to absorption by vapor. From the standard spectral distribution charts for the clear sky and cloudy sky, and from the dimensionless spectral distributions obtained by dividing them by the peak values, spectral distributions could be estimated of insolation quantities for the clear sky, cloudy sky, etc. As for the characteristics of spectral solar radiation on a tilt surface obtained from Bird`s model, they agreed with actually measured values at an angle of inclination of 60{degree} or smaller. 6 refs., 10 figs., 1 tab.

  10. Experiment for estimating phase velocity and power fraction of Love wave from three component microtremor array observation in Morioka area; Moriokashiiki deno bido no sanseibun array kansoku ni yoru love ha no iso sokudo oyobi power hi suitei no kokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, H.; Yakuwa, A.; Saito, T. [Iwate University, Iwate (Japan). Faculty of Engineering


    Three component microtremor array observations were carried out in two locations in the city of Morioka for an attempt of estimating phase velocity and power fraction of Love wave by applying the expanded three component spatial self-correlation method. The microtremors were observed by using a seismograph with a natural period of one second. The arrays were so arranged as to form an equilateral triangle consisted of seven points. The maximum radii were 100 m, 50 m, 25 m and 12.5 m for vertical movements, and 100 m and 30 m for horizontal movements at the Iwate University, and 80 m, 40 m, 20 m and 10 m for vertical movements and 90 m for horizontal movements at the Morioka Technical Highschool. The analysis has used three sections, each with relatively steady state of about 40 seconds as selected from records of observations for about 30 minutes. The result of the discussions revealed that it is possible to derive phase velocity of not only Rayleigh waves but also Love waves by applying the expanded spatial self-correlation method to the observation record. Thus, estimation of underground structures with higher accuracy has become possible by using simultaneously the Rayleigh waves and Love waves. 3 refs., 11 figs., 2 tabs.

  11. Optimization of dynamic source depth for seismic surveys. Part 7; Dynamite shingen no hasshin shindo no saitekika ni tsuite (hyoso kozo no suitei (kusssetsuho jishin tansa oyobi denki denjiho tansa)). 7

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, H.; Murayama, R.; Mitsuhata, Y.; Ishikawa, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center


    For the improvement of quality of data collected by reflection aided seismic exploration using dynamite as the seismic source, information has to be collected about the surface layer structure before the charge depth is determined. For this purpose, refraction, electric, and electromagnetic exploration methods were tried. In the refraction method, an impactor was used as the seismic source. In the records, the surface wave prevails because vibration was generated on the surface. Analysis was made by the use of the initial travel time tomography. In the electric exploration, a double pole array was used to measure resistivity. The measured data was subjected to a fully automatic inversion for analysis. As the result, it was disclosed that it was useful to know the deep-level structure directly by use of tomographic methods in refraction seismic exploration so as to find the optimum charge level. Furthermore, about the electric and electromagnetic exploration techniques, it was found that these methods can be applied making use of resistivity to the evaluation of groundwater saturation. 7 refs., 5 figs., 3 tabs.

  12. Estimation of shallow ground structure using short-period microtremors array observation. Results in Morioka area; Tanshuki bido no array kansoku ni yoru senbu chika kozo no suitei. Moriokashiiki ni okeru kekka

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, H.; Obuchi, T.; Saito, T.; Iwamoto, K. [Iwate University, Iwate (Japan). Faculty of Engineering; Yoshida, Y. [OYO Corp., Tokyo (Japan)


    The velocity structure in the shallow ground structure was evaluated by observing microtremors of 1-10Hz in the Morioka City area. Plural wave sections free of vehicle noises or the like were selected out of the collected microtremor records, and the Fourier spectrum and coherence were calculated. Records sufficiently supporting the correlation between seismographs were chosen for the analysis. The phase velocity was calculated for each observation spot from plural array records by use of the F-K spectrum. The underground velocity structure was estimated by the inversion process using the matrix method. In this method, an early model was built on the basis of the observed phase velocity and the optimum underground velocity structure was determined by alternately performing two inversion processes: one for the case wherein the S-wave velocity is the sole parameter and the other for the case wherein the layer thickness is the sole parameter. As the result, a shallow underground velocity structure, which has good agreement with the available boring data in the Morioka City area, was successfully estimated, verifying the validity of this method. 4 refs., 7 figs.

  13. Range of wavelengths possible to estimate phase velocities of surface waves in microtremors; Bido tansaho ni okeru suitei kanona bidochu no hyomenha iso sokudo no hacho han`i

    Energy Technology Data Exchange (ETDEWEB)

    Miyakoshi, K.; Okada, H.; Ling, S. [Hokkaido University, Sapporo (Japan)


    To specify the maximum wavelength of the phase velocities that can be estimated by the spatial autocorrelation (SPAC) method or F-K method in microtremor exploration, investigations were conducted using numerical simulation. In view of feasibility, an equilateral triangle array was employed, the maximum radius of the array having 7 observation points being 0.10km. The dispersion curve of the Rayleigh wave basic mode was calculated from an underground structure model. White noise was used as the incident wave, and, in case the waves came in from multiple directions, a different phase spectrum was assigned to each direction. In searching for the maximum wave length of phase velocities that could be estimated, a limit was imposed upon estimation, and it was prescribed that the wavelength be the limit if the difference between the theoretical value and estimated phase velocity was 5% or higher. As the result, it was found that it is possible to estimate the phase velocity when the wavelength is up to approximately 10 times longer than the array maximum radius in the SPAC method, and up to approximately 5 times longer in case of the F-K method. 10 refs., 5 figs., 1 tab.

  14. Development of the spectrometric imaging apparatus of laser induced fluorescence from plants and estimation of chlorophyll contents of rice leaves; Laser reiki keiko sokutei sochi no kaihatsu to inehanai no chlorophyll ganryo no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Nakaya, K.; Shoji, K.; Hanyu, H.


    Photosynthetic activity of plants is an important factor to assess the micrometeorological effect of plant canopy or to estimate the influence of circumstances such as water stress. Light illumination induces fluorescence from a leaf or suspension of chloroplasts. The red chlorophyll fluorescence had been used to determine the process of the electron transportation in photosynthetic reaction. The fluorescence source other than chlorophyll is not announced sufficiently, but is supposed to be useful to determine the contents of the substance corresponding to physiological response of plants. We developed a fluorescence imaging apparatus to observe spectrum and distribution of laser induced fluorescence from a leaf. Pulsed UV-laser (Nd:YAG) induced blue-green fluorescence and red chlorophyll fluorescence from a green leaf. The pulse modulated measuring light and CCD with image-intensifier (ICCD) enable to detect the fluorescence from plants under illumination. The laser induced fluorescence (LIF) spectra were investigated to estimate the chlorophyll contents in leaves of rice. During the greening course of dark grown etiolated rice leaves, chlorophyll contents were determined using the extraction of leaves and steady state LIF spectra were measured. As a result, the ratio of fluorescent intensity between blue-green and red peaks (F460/F740 and F510/F740) decreased in proportion to alteration of chlorophyll contents respectively. These fluorescence intensity ratios perform more precise estimation of higher chlorophyll contents of leaves than reported red chlorophyll fluorescence intensity ratio (F690/E740). (author)

  15. Shape estimation of the buried body from the ground surface potential distributions generated by current injection; Tsuryu ni yoru chihyomen den`i bunpu wo riyoshita maizobutsu keijo no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, Y.; Okamoto, Y. [Chiba Institute of Technology, Chiba (Japan); Noguchi, K. [Waseda University, Tokyo (Japan); Teramachi, Y. [University of Industrial Technology, Kanagawa (Japan); Akabane, H.; Agu, M. [Ibaraki University, Ibaraki (Japan)


    Ground surface potential distribution generated by current injection was studied to estimate the shape of buried bodies. Since the uniform ground system including a homogeneous buried body is perfectly determined with the surface shape of a buried body and resistivities in/around a buried body, inversion is easy if the surface shape is described with some parameters. N electrodes are arranged in 2-D grid manner on the ground, and two electrodes among them are used for current injection, while the others for measurement of potentials. M times of measurements are repeated while changing combination of electrodes for current injection. The potential distribution measured by the mth electrode pair is represented by N-2 dimensional vectors. The square error between this distribution and calculated one is the function of k parameters on the surface shape and resistivities on a buried body. Both shape and resistivities can be estimated by solving an optimum value problem using the square error as evaluation function. Analysis is easy for a spherical body with 6 unknown parameters, however, it is difficult for more complex bodies than elliptical one or more than two bodies. 5 refs., 9 figs.

  16. Estimation of stress concentration factor at weld toe of non-load carrying fillet welded joints. Hikaju dentatsu gata suminiku yosetsu tsugite no shitanbu no oryoku shuchu keisu no suitei shiki

    Energy Technology Data Exchange (ETDEWEB)

    Tsuji, I. (Kyushu Univ., Fukuoka (Japan). Faculty of Engineering)


    It was indicated that decrease of fatigue strength was caused by stress concentration, and that it was apt to occur especially at the end. For the reason, factors affecting on tensile and bending stresses at the end were calculated by applying boundary element method and by using the results, estimating equation was proposed for stress concentration factors at the end of joint. As the objects of analysis, cross shape and T shape joints were selected. As for the analytical method, stress concentration factors were obtained by applying boundary element method with linear elements. As the consideration on the result of analysis, estimation equation of stress concentration factor were proposed for cross and T shapes of joints. The equations were confirmed of its applicability to wide range of stress. 15 refs., 8 figs., 3 tabs.

  17. Estimating method for a phase-velocity of Rayleigh waves on multi-layered media and its application to inversion problem; Rayleigh ha no bunsan kyokusen no kinji keisanho no teian to chika kozo suitei eno oyo

    Energy Technology Data Exchange (ETDEWEB)

    Konno, K. [Shibaura Institute of Technology, Tokyo (Japan)


    An attempt was made to approximate a dispersion curve being a function of S-wave velocity, P-wave velocity, density and layer thickness by using only the S-wave velocity and the layer thickness. Then, this approximation method was utilized for an attempt of deriving the S-wave velocity structure directly from the observed dispersion curve. Lastly, the derived S-wave velocity structure was attempted to be utilized as an initial model for inversion analysis. The pseudo-phase velocity derived by using this proposed method becomes functions for only the cycle, S-wave velocity and layer thickness, converges into the S-wave velocity of the lowermost layer at the extreme of a long cycle, and agrees with the S-wave velocity of the surface layer in the short cycle side. The pseudo-dispersion curve approximates the dispersion curve of Rayleigh waves more closely than that of Love waves. If depths and pseudo-wave lengths are in rough agreement in a region in which amplitude of the base mode Rayleigh waves is distributed largely, the pseudo-phase velocity resembles to the theoretical phase velocity. S-wave velocity at a ground depth which corresponds to a length of the Rayleigh wave could be estimated to some extent by differentiating the wavelength with regard to the cycle. 7 refs., 19 figs., 1 tab.

  18. Improvement on life and NO{sub x} discharge of radiant heat transfer tube heating system by the elasto-plasticity creep analysis; Dansosei kuripukaiseki ni yoru hosha dennetsukan kanetsu shisutemu no jumyo to NO{sub x} haishutsuryo no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Nakagawa, Futahiko; Ikaruda, Kunihiro; Abe, Yoshio; Arai, Norio


    Combustion thermal process using the radiant heat transfer tube has widely been applied as a heating method which separates the combustion atmosphere from the heating-e atmosphere in various heating furnace such as iron and steel industry. In this thermal process, in order to burn the fuel in tight space in radiant heat transfer service area, radiant heat transfer tube and burner life were short under high temperature and high-load combustion, and there was a problem that that and, burning characteristic such as NO{sub x} generation rate are improved was difficult. In this study, large temperature distribution by the combustion in the radiant heat transfer tube clarified that the life of the radiant heat transfer tube was shortened by elasto-plasticity creep analysis of the radiant heat transfer tube. Then, two steps combustion burner of the exhaust gas self recycling type was developed as a method for reducing the NO{sub x} generation rate, while the temperature distribution of the radiant heat transfer tube was equalized. As the result, it was possible to reduce over 20% in comparison with conventional two steps combustion burner, while radiant heat transfer tube and life of the burner are extended over the conventional double, in respect of the NO{sub x} generation rate. (translated by NEDO)

  19. Fiscal 1997 report on the results of the international standardization R and D. R and D of the standardization of a method to test acceleration life of phosphorous acid fuel cells; 1997 nendo seika hokokusho kokusai hyojun soseigata kenkyu kaihatsu. Rinsangata nenryo denchi no kasoku jumyo shiken hoho no hyojunka ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)



    As for fuel cells, which are expected as a new clean energy, the R and D are being proceeded with in various fields of the world, but the standardization has not been made both in Japan and abroad. In Japan, the situation is that the information on technical terms, indication method, performance test method, and environment/safety test methods of the phosphorous acid fuel cell power generation is publicly spread. In relation to the international promotion of fuel cells to be predicted, it is necessary to internationally standardize cells themselves which are a key component of fuel cell power generation facilities. Phosphorous acid fuel cells are expected of the earliest commercialization of all, but the common test method to evaluate life characteristics of the cell stack has not been established yet. In the R and D, for the purpose of internationally standardizing test methods to evaluate life characteristics of the cell stack, a study on the acceleration life test method of phosphoric acid fuel cells was conducted in terms of the technical trend, data, standard, etc. A plan was prepared on general rules of the method to test acceleration life at the cell reaction part of the small cell, and activities also were started for setting up a technical committee for the fuel cell power system in President`s Advisory Committee on Future Technology. 29 figs., 20 tabs.

  20. General report on the results of the development of fuel cell technology such as urban energy center. Evaluation study of life of phosphoric acid fuel cells (fiscal 1995 and 1996); Toshi energy center nado nenryo denchi gijutsu kaihatsu kenkyu seika sogo hokokusho. Rinsangata nenryo denchi jumyo hyoka kenkyu (1995 kara 1996 nendo)

    Energy Technology Data Exchange (ETDEWEB)



    Receiving subsidies from MITI, NEDO carried out this project in fiscal 1995 and 1996 as a joint research with Technology Research Association for Phosphoric Acid Fuel Cell Power Generation System and others. The project aimed at developing the accelerated test method which can evaluate in a short time the cell life of phosphoric acid fuel cells (PAFC) and the lowering of characteristics. The accelerated test method of PAFC life is thought to be a tool indispensable for the promotion of commercialization, but the accelerated test method like the usual material evaluation has not yet been established. To solve this problem, procedures were developed to rationally plan the accelerated test on short stacks of full scale based on the small cell test data. Here, to rationally estimate the operational state under actual conditions based on the data on the accelerated test, it is necessary to fully understand the mechanism of deterioration of PAFC. By conducting in parallel the element study for the basic elucidation of cell deterioration phenomena, obtained was the useful information/knowledge which back up the results of the accelerated test scientifically. 168 figs., 33 tabs.

  1. Study on unified fatigue strength assessment method for welded structure. Hot spot stress evaluating method for various combinations of plate thickness and weld leg length; Yosetsu kozo no toitsutekina hiro kyodo hyokaho ni kansuru kenkyu. Itaatsu to yosetsu ashinaga no kumiawase ni taisuru hot spot oryoku sanshutsu ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Nihei, K.; Inamura, F.; Koe, S. [Kawasaki Heavy Industries, Ltd., Kobe (Japan)


    There has been tried to apply unified assessment method using hot spot stress, which is effective to evaluate fatigue strength of fillet welded structures for ships and marine structures. This method can be applied to complicated structures and is independent of welding processes. In this study, first, stress analysis has been conducted for two-dimensional fillet welded joint models with various combinations of plate thickness and weld leg length of general fillet structures by means of boundary element method. Then, critical position, which is not affected by local stress concentration due to bead, was determined from the detailed stress distribution in the vicinity of weld toe. As a result, a general equation has been proposed to estimate the hot spot stress by one-point representative method. Second, the fatigue tests of typical fillet welded joints have been conducted by applying this method. Consequently, it was demonstrated that the unified fatigue strength can be evaluated by the S-N data based on hot spot stress range determined from the proposed equation, independent of structural stress concentration. 22 refs., 14 figs.

  2. Effects of grain size and aging conditions of fatigue crack propagation behavior in beta Ti-22V-4Al alloy; {beta} gata Ti-22V-4Al gokin no hiro kiretsu shinten kyodo ni oyobosu kessho ryukei to jiko joken no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Tokaji, K. [Gifu University, Gifu (Japan). Faculty of Engineering; Oya, K. [Daido Steel Co. Ltd., Nagoya (Japan); Kariya, H. [Aisan Industry Co. Ltd., Aichi (Japan)


    This paper presents the effect of microstructural modification on fatigue crack propagation (FCP) in a beta Ti-22V-4Al alloy. FCP experiments have been conducted using eight materials with different microstructures: two as solution treated materials (ST), three single aged materials (STA), and three two-step aged materials (STDA). Particular attention has been paid to the effect of grain size and aging condition. The results showed that in ST materials the coarse grained material exhibited higher FCP resistance than the fine grained material, but this grain size dependence was eliminated by aging, and two-step aging condition had very little influence on FCP behaviour. After allowing for crack closure, the effect of grain size was largely diminished and FCP behaviour was not affected by solution treatment temperature and aging condition. ST materials indicated the highest apparent and intrinsic FCP resistance and then STDA materials. STA materials in the decreasing order. Taking into account the difference in the modulus of elasticity in addition to crack closure, the difference in FCP resistance between STDA and STA materials was eliminated, but ST materials still showed higher FCP resistance. (author)

  3. Fundamental study on the new method to estimate vibration level on a ship. Formulation of the damping matrix based on dissipation energy caused by fluid viscosity; Senpaku no shindo level suitei ni kansuru kisoteki kenkyu. Ryutai no nensei ni yoru san`itsu energy ni motozuku gensui matrix no teishikika

    Energy Technology Data Exchange (ETDEWEB)

    Funaki, T.; Hayashi, S. [Osaka University, Osaka (Japan). Faculty of engineering


    It is known in estimating vibration characteristics of a ship that fluid range affects largely a structure. In order to analyze the compound vibration therein, a method was proposed, which estimates vibration levels without using the finite element method. However, the problem of mode decay ratio has not been solved. Therefore, this paper first describes a method to introduce an equivalent linear decay matrix. The paper then mentions difference in the decay effects due to fluid viscosity in a shallow and deep water regions. Furthermore, vibration levels in the deep water region were estimated in a model experiment to verify the estimation result. Under a hypothesis that two-node vibration in a rotating ellipse has displacement distributions in the deep and shallow water regions equivalent, and when a case of vibration in a layer flow condition is calculated, dissipation energy in the shallow region is larger than that in the deep region by about 26%. About 5% of the total dissipation energy is consumed at bottom of the sea. According to a frequency response calculation, estimated values for the response levels still differ from experimental values, although the trend that the vibration levels change can be reproduced. 6 refs., 15 figs., 2 tabs.

  4. Estimation of tensile shear strength of spot welded joint of steel sheets. 1st report. Resistance spot welded joint strength of steel sheets; Usukohan supotto yosetsu tsugite no hippari sendan tsuyosa no suitei. 1st report. Teiko supotto yosetsu tsugite no tsuyosa

    Energy Technology Data Exchange (ETDEWEB)

    Kabasawa, M.; Funakawa, Y.; Ogawa, K. [NKK Corp., Tokyo (Japan); Tamura, M. [Kokan Keisoku Co. Ltd., Tokyo (Japan)


    Recently, use of thinner steel sheets was promoted with their higher strength for weight reduction of car body in the car industry, and also use of higher strength steel sheets was proceeded to improve its collision safety. Among such a condition, estimation of strength of the most fundamental single spot welding joint becomes important because body and parts strengths are mainly occupied by the strength of the welded joint. As relationships between shear strength and strength, thickness and nugget diameter of the steel sheets were investigated uptodate and a lot of empirical equations were obtained, a result obtained by numerical analysis was individual, and empirical equations obtained in conventional studies were narrow in their applied regions and could not be forecast for their application limits. In this study, for a joint obtained by a welding condition corresponding to A class of Japan Welding Society standard WES7301, as an object of low carbon steel sheet containing more than 0.03% of carbon widely used for the car body, an experimental equation to estimate tensile shear strength specified in JIS Z3136 from sheet thickness, mother material feature and nugget diameter was induced. 10 refs., 17 figs., 4 tabs.

  5. Estimation of a stress field in the earth`s crust using drilling-induced tensile fractures observed at well WD-1 in the Kakkonda geothermal field; Kakkonda WD-1 sei de kansokusareta drilling induced tensile fracture ni yoru chikaku oryokuba no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Okabe, T. [GERD Geothermal Energy Research and Development Co. Ltd., Tokyo (Japan); Hayashi, K. [Tohoku Univ., Sendai (Japan). Inst. of Fluid Science; Kato, O.; Doi, N.; Miyazaki, S. [Japan Metals and Chemicals Co. Ltd., Tokyo (Japan); Uchida, T. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)


    This paper describes estimation of a stress field in the earth`s crust in the Kakkonda geothermal field. Formation micro imager (FMI) logging known as a crack detecting logging was performed in the well WD-1. This FMI logging has made observation possible on cracks along well axis thought to indicate size and direction of the crust stress, and drilling-induced tensile fractures (DTF). It was verified that these DTFs are generated initially in an azimuth determined by in-situ stress (an angle up to the DTF as measured counterclockwise with due north as a starting point, expressed in {theta}) in the well`s circumferential direction. It was also confirmed that a large number of cracks incline at a certain angle to the well axis (an angle made by the well axis and the DTF, expressed in {gamma}). The DTF is a crack initially generated on well walls as a result of such tensile stresses as mud pressure and thermal stress acting on the well walls during well excavation, caused by the in-situ stress field. Measurement was made on the {theta} and {gamma} from the FMI logging result, and estimation was given on a three-dimensional stress field. Elucidating the three-dimensional crust stress field in a geothermal reservoir is important in making clear the formation mechanism thereof and the growth of water-permeable cracks. This method can be regarded as an effective method. 9 refs., 8 figs., 1 tab.

  6. Estimation of underground structure using phase velocities of Love-and Rayleigh-waves from three-component microtremor array observation at Morioka city; Moriokashi ni okeru sanseibun are bido kansoku ni yoru reiri-ha rabu-ha no ryoiso sokudo wo mochiita chika kozo suitei

    Energy Technology Data Exchange (ETDEWEB)

    Yamamoto, Hidekazu; Saito, Tokumi; Ohashi, Hiromasa [Iwate University, Iwate (Japan)


    In conventional microtremor prospecting methods, underground structure is estimated using the phase velocity of Rayleigh-wave only. However, it is considered that the underground structure can be estimated at a higher accuracy by using two phase velocities of Rayleigh-wave and Love-wave that directly reflects S-wave velocity structure. Therefore, three-component microtremor array observation of a circle (equilateral triangle) with the maximum radius of 40 to 250 m was carried out at the center of Morioka city. Analysis was carried out by means of extended space with autocorrelation to obtain phase velocities of Love- and Rayleigh-waves. The frequency zone of the obtained Rayleigh-wave phase velocity is 1.5 Hz to 8.6 Hz, and the phase velocity is 2670 m/s to 733 m/s. The frequency zone of the obtained Love-wave phase velocity is 3 Hz to 8.6 Hz, and the phase velocity is 2100 m/s to 412 m/s. The underground structure obtained by using two observed phase velocities is clarified under a depth of 116 m. A stratum deemed to be the basement exists from a depth of 21 m (Vs=1100 m). As a result, the underground structure can be estimated at a higher accuracy if two phase velocities of Love-and Rayleigh-waves are used. (translated by NEDO)

  7. Applicability of the spatial autocorrection method for estimation of basement structure in Kanto plain. Array measurements of microtremors close to the Iwatsuki and Shimosa deep borehole observatory; Kanto heiya no kiban kozo suitei no tame no kukan jiko sokanho no tekiyosei. Iwatsuki Shimosa jiban katsudo kansokusei ni okeru array bido kansoku

    Energy Technology Data Exchange (ETDEWEB)

    Matsuoka, T.; Umezawa, N.; Shiraishi, H. [Saitama Institute of Environmental Pollution, Saitama (Japan)


    To investigate applicability of the spatial autocorrection method which is a microtremors exploration method for the estimation of basement structure, array measurements of microtremors were performed using the Iwatsuki and Shimosa deep borehole observatory where detailed structures were clarified as well as the Fuchu and Koto deep borehole observatory. In this study, estimated velocity structures of S-wave were compared with the geological sequence and results of acoustic velocity logging. The phase velocity was estimated by the spatial autocorrection method using FFT. The phase velocity with a smooth normal dispersion was observed in the periodic range from 0.5 to 5 sec in Iwatsuki, and from 0.5 to 4 sec in Shimosa by the combination of four-point circular arrays with radii of 100, 300, and 600 m. The underground structures estimated from the phase velocities coincided well with the geological sequence, and results of acoustic velocity logging and velocity logging for each borehole. For the Iwatsuki borehole, the basement velocity was also estimated properly in the periodic range of observation. While, for the Shimosa borehole, measurements with the period around 6 sec were required to estimate the basement velocity more accurately. 13 refs., 11 figs., 1 tab.

  8. Reference: 574 [Arabidopsis Phenome Database[Archive

    Lifescience Database Archive (English)

    Full Text Available tor-like kinase ALE2 controls shoot development by specifying epidermis in Arabidopsis. 9 1643-52 17376810 2007 May Development (Camb...ridge, England) Hiroe Tomonori|Ikezaki Masaya|Machida Chiyoko|Machida Yasunori|Sasa

  9. Advising the Command: Best Practices from the Special Operations Advisory Experience in Afghanistan (United States)


    building partner capacity includes Jefferson P. Marquis, Jennifer D. P. Moroney, Justin Beck, Derek Eaton, Scott Hiro- moto , David R. Howell, Janet Lewis...example, the SMW SOAG cancelled plans for the MI-17 aircraft to carry electrically driven mini- or Gatling guns. They reasoned that the mini-gun weight

  10. A Hybrid Interval–Robust Optimization Model for Water Quality Management (United States)

    Xu, Jieyu; Li, Yongping; Huang, Guohe


    Abstract In water quality management problems, uncertainties may exist in many system components and pollution-related processes (i.e., random nature of hydrodynamic conditions, variability in physicochemical processes, dynamic interactions between pollutant loading and receiving water bodies, and indeterminacy of available water and treated wastewater). These complexities lead to difficulties in formulating and solving the resulting nonlinear optimization problems. In this study, a hybrid interval–robust optimization (HIRO) method was developed through coupling stochastic robust optimization and interval linear programming. HIRO can effectively reflect the complex system features under uncertainty, where implications of water quality/quantity restrictions for achieving regional economic development objectives are studied. By delimiting the uncertain decision space through dimensional enlargement of the original chemical oxygen demand (COD) discharge constraints, HIRO enhances the robustness of the optimization processes and resulting solutions. This method was applied to planning of industry development in association with river-water pollution concern in New Binhai District of Tianjin, China. Results demonstrated that the proposed optimization model can effectively communicate uncertainties into the optimization process and generate a spectrum of potential inexact solutions supporting local decision makers in managing benefit-effective water quality management schemes. HIRO is helpful for analysis of policy scenarios related to different levels of economic penalties, while also providing insight into the tradeoff between system benefits and environmental requirements. PMID:23922495

  11. A Hybrid Interval-Robust Optimization Model for Water Quality Management. (United States)

    Xu, Jieyu; Li, Yongping; Huang, Guohe


    In water quality management problems, uncertainties may exist in many system components and pollution-related processes (i.e., random nature of hydrodynamic conditions, variability in physicochemical processes, dynamic interactions between pollutant loading and receiving water bodies, and indeterminacy of available water and treated wastewater). These complexities lead to difficulties in formulating and solving the resulting nonlinear optimization problems. In this study, a hybrid interval-robust optimization (HIRO) method was developed through coupling stochastic robust optimization and interval linear programming. HIRO can effectively reflect the complex system features under uncertainty, where implications of water quality/quantity restrictions for achieving regional economic development objectives are studied. By delimiting the uncertain decision space through dimensional enlargement of the original chemical oxygen demand (COD) discharge constraints, HIRO enhances the robustness of the optimization processes and resulting solutions. This method was applied to planning of industry development in association with river-water pollution concern in New Binhai District of Tianjin, China. Results demonstrated that the proposed optimization model can effectively communicate uncertainties into the optimization process and generate a spectrum of potential inexact solutions supporting local decision makers in managing benefit-effective water quality management schemes. HIRO is helpful for analysis of policy scenarios related to different levels of economic penalties, while also providing insight into the tradeoff between system benefits and environmental requirements.

  12. New Radiation Therapy Systems: Applications to Human Cancer Treatment and Novel Drug Discovery (United States)


    Dino, Pamela M. Feng, Yi Fiscus, Ronald Gach, H Michael Hayes, Eugene F. Johlfs, Mary McGregor, John 34 Pizzorno, Giuseppe Roach, Joseph Dana Jr...apoptosis. Counter- vailing influences of nitric oxide and angiotensin II. Circ Res 1996;79: 748–56. [17] Shimojo T, Hiroe M, Ishiyama S, Ito H, Nishikawa T

  13. Influence of temperature on the inheritance of adult life span in Drosophila melanogaster. (United States)

    Yonemura, I; Abe, M; Ishidate, R; Ishiyama, T; Motoyama, T; Hasekura, H; Boettcher, B


    Mating experiments were performed at 27 degrees C, 22 degrees C, and 17 degrees C, to investigate the inheritance of adult life span of highly inbred strains of Drosophila melanogaster. Effects of temperature difference were quantitatively analyzed at the genotypic level. In the temperature range of 17-27 degrees C the autosomal longevity alleles, A1 and A2, exerted major effects. Their effects produced longer life spans as the temperature decreased. The sex-linked longevity alleles, X1 and X2, played a secondary role in influencing life span, and they displayed different effects at different temperatures. Each genotype showed correspondence to the life span expected from the combinations of these longevity genes at the respective temperatures. The genetic loci controlling life span in these inbred strains were named JmA and JmX from "Ju-myo" which means life span or longevity in Japanese.

  14. Iranian Operational Decision Making: Case Studies from the Iran-Iraq War (United States)


    to reassess Iran’s overall wartime strategy and ultimate ob- jectives. In June, a general meeting of the Supreme Defense Council ( SDC ) was convened to...Hiro, The Longest War: The Iran-Iraq Military Conflict (New York: Routledge, 1991), 86. 8 Khomeini usually did not attend SDC sessions. The fact...suggest that the debate in the SDC soon fractured along institutional and ideological lines. Those who were against pursuing the war on Iraqi territory

  15. Thinking About the Unthinkable: Tokyo’s Nuclear Option (United States)


    toward rival South Korea and has “weaponized” enough plutonium for four or five implosion -type nuclear warheads.4 Japanese thinkers have studied the rise...Hiro- shima and Nagasaki it would conjure up. Tokyo could detonate a device near some Japanese-held island in the Pacific, such as Okinotori-shima...destroyers as a stopgap measure. Two or three de- stroyers could cruise simultaneously in disparate locations in the Pacific, enhancing redundancy and

  16. 「財子壽」論 : '福壽堂'の空間設定について


    蔡, 桂真; Cai, Jiazhen


    "Riches, Sons, and Long Life" is a story developed inf Fukuzyu-do where symbolized the attitude to the hiro's life like Figure 1. This paper considers "Riches, Sons, and Long Life" from various arrangement around Fukuzyu-do. The first section examines environmental description of Fukuzyu-do. It considers a similarity in space arrangement between Fukuzyu-do and Honore de Balzac's "Eugenie Grandet" based on the description of Lu's diary. The second section investigates the intention of the hero...

  17. JPRS Report, Science & Technology, Japan, Joint Convention of Electrical and Information Engineers (United States)


    Modulator 2.3 Magnetic SLM An SLM has been developed by using an optical Faraday effect of yttrium iron garnet [YIG]-based single crystal thin films...developed by liquid phase epitaxy [ LPE ] on gadolinium gallium garnet [GGG]. Pixels are made by mesa-etching YIG thin films. Then, each pixel is magnetized by...Nonlinear Optical Materials [Hachiro Nakanishi, Hiro Matsuda, et al.] ........................ 13 Application of Liquid Crystal Materials to Large Displays

  18. Overcoming Japan’s Imperial Legacies: A Review Essay

    Directory of Open Access Journals (Sweden)

    Sherzod Muminov


    Full Text Available Yukiko Koga. Inheritance of Loss: China, Japan, and the Political Economy of Redemption after Empire. Chicago, IL: University of Chicago Press, 2016. Hiro Saito. The History Problem: The Politics of War Commemoration in East Asia. Honolulu: University of Hawai‘i Press, 2016. Japan’s war for empire ended in September 1945, as World War II drew to a close. Pinpointing its outbreak, however, is less straightforward: did it start with the July 1937 Marco Polo Bridge Incident, with the September 1931 Manchurian Incident, or, earlier yet, with the 1910 annexation of Korea? The lack of a single accepted narrative is symptomatic of broader divisions over history between Japan and its neighbors, primarily China and South Korea. As a result, the path toward reconciliation has proven tortuous, beset on all sides by persistent disagreements about past events. Two new books approach these disputes from the perspectives of anthropology (Yukiko Koga’s Inheritance of Loss and sociology (Hiro Saito’s The History Problem, highlighting the complexity of imperial vestiges inherited by the current generations in East Asia. From their distinct yet complementary vantage points, both books enrich the debate on the outcomes of the Second World War in East Asia. Their findings illuminate the obstacles on the way to reconciliation, but also highlight the potential for compromise.

  19. An Orchestra's Guide to the Universe (United States)

    Harrus, I.; RIME Arthur Bloom Collaboration


    We describe here an interdisciplinary program that combines astronomy and music in a unique and unprecedented fashion. This is an intensive program in which students prepare for and perform with a professional orchestra. For many of its participants, it is a life-changing experience. For us, it is a conduit for developing, implementing and disseminating truly innovative and interdisciplinary science education and outreach. The team, headed by composer Arthur Bloom, who created the original and highly successful music program, includes astronomers, teachers, educators, and evaluators. We are working in collaboration with a school in Berwins Heights and with graduate students in astronomy from the University of Maryland in College Park under the supervision of Cole Miller. The evaluation of the program is done under the supervision of Hiro Yoshikawa (Harvard University). The program received seed funding from an IDEAS grant awarded to Arthur Bloom in 2003. This unique collaboration provides an opportunity to develop innovative and interdisciplinary educational and outreach materials, leverage investment and broadly disseminate our results, share costs, link with school systems, target underserved and underrepresented populations, cultivate new sources of media attention, and enhance interest and learning in astronomy.

  20. Review of the current treatments for leishmaniases

    Directory of Open Access Journals (Sweden)

    Lindoso JA


    Full Text Available José Angelo Lauletta Lindoso,1 Jackson Maurício Lopes Costa,2 Igor Thiago Queiroz,3 Hiro Goto41Instituto de Infectologia Emilio Ribas-SES- SP, São Paulo, São Paulo, Brazil; 2Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Bahia, Brazil; 3Departament of Infectious Diseases, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Sao Paulo, Brazil; 4Instituto de Medicina Tropical de São Paulo, and Faculdade de Medicina, Universidade de São Paulo, Sao Paulo, Sao Paulo, BrazilAbstract: Leishmaniases are vector-borne zoonotic diseases that are prevalent in tropical and subtropical areas in the world, with two million new cases occurring yearly. Visceral and tegumentary forms of leishmaniasis are known. The latter form may present as localized cutaneous or mucosal forms, disseminated, diffuse forms, or leishmaniasis recidiva cutis. Visceral leishmaniasis is caused by parasites of the species Leishmania (Leishmania donovani and L. (L. infantum, and tegumentary leishmaniasis is caused by 15 other species, with distinct distributions in the Old and New World. The varied clinical manifestations, the multitude of Leishmania species, and the increasing incidence of HIV coinfection make the diagnosis and treatment of leishmaniases complex. Since there are no solid data relating clinical manifestations, treatment outcomes and Leishmania species the decision regarding the best therapeutic option is almost entirely based on clinical manifestations. Because most of the literature is focused on leishmaniasis in the Old World, in this review we present data on the treatment of New World leishmaniasis in more detail. Ranked therapeutic options, clinical trials, and also observations, even with a restricted number of subjects, on treatment outcome of visceral and different forms of tegumentary leishmaniasis, are presented. Treatment for leishmaniasis in HIV-coinfected patients is addressed as well. Some of these data strongly

  1. PREFACE: XIV International Conference on Calorimetry in High Energy Physics (United States)

    Wang, Yifang


    (Texas Tech University), Weidong Li (IHEP) 3) Readout techniques - Gerald Eigen (University of Bergen), Zheng Wang (IHEP) 4) Operating calorimeters and calibration - Marat Gataullin (CERN), Francesco Lanni (BNL) 5) Future calorimetry - Tohru Takeshita (Shinshu University), Lei Xia (Argonne National Laboratory) 6) Astrophysics and neutrino calorimetry - Giuliana Fiorillo (INFN), Hiro Tajima (SLAC) List of Participants AKCHURIN, NuralTexas Tech University AN, ZhenghuaIHEP AUFFRAY, EtiennetteCERN BANFI, DaniloUniversità degli Studi di Milano, INFN BASHARINA-FRESHVILLE, AnastasiaUniversity College London BEAUCHEMIN, Pierre-HuguesUniversity of Oxford BENAGLIA, Andrea DavideUniversity of Milano - Bicocca and INFN BIAN, JianminIHEP BIINO, CristinaINFN BILKI, BurakUniversity of Iowa BLAHA, JanLAPP BOUDRY, VincentLLR / CNRS-IN2P3 CAI, XiaoIHEP CAPONE, AntonioPhysics Department University "La Sapienza" and INFN CAVALLARI, FrancescaCERN and INFN Rome CECCHI, ClaudiaUniversity di Perugia e INFN CHANG, JinfanIHEP CHEN, HuchengBrookhaven National Laboratory CHILDERS, TaylorUniversität Heidelberg - Kirchhoff-Institut für Physik DAO, ValerioGeneva University - DPNC DE LA TAILLE, ChristopheIN2P3/OMEGA-LAL DIEMOZ, MarcellaINFN Roma DOTTI, AndreaCERN EIGEN, GeraldUniversity of Bergen EPIFANOV, DenisBudker Institute of Nuclear Physics FAIVRE, JulienLPSC Grenoble France FANG, JianIHEP FANG, ShuangshiIHEP FANTONI, AlessandraINFN - LNF FERRI, FedericoCEA/Saclay Irfu/SPP FERRONI, FernandoSapienza University & INFN Roma FISK, Henry EugeneFermilab GABALDON, CarolinaCERN GARUTTI, ErikaDESY GAUDIO, GabriellaIstituto Nazionale di Fisica Nucleare - Sezione di Pavia GILLBERG, DagCarleton University GIOVANNINI, PaolaMax-Planck-Institut für Physik GLAZOV, AlexanderDESY GRACHOV, OlegUniversity of Kansas HAPPACHER, FabioINFN HE, MiaoIHEP HORI, YasutoUniversity of Tokyo, CNS HU, TaoIHEP HULTH, Per-OlofStockholm University JUN, Soon YungCarnegie Mellon University JURK, StefanISEG Spezialelektronik gmb

  2. EDITORIAL: Focus on Dilute Magnetic Semiconductors FOCUS ON DILUTE MAGNETIC SEMICONDUCTORS (United States)

    Chambers, Scott A.; Gallagher, Bryan


    Campion, A W Rushforth, D Chiba, Z Li, X Liu, W Van Roy, H Ohno, J K Furdyna, B Gallagher, K Brunner, G Schmidt and L W Molenkamp Local structural, magnetic and magneto-optical properties of Mn-doped SiC films prepared on a 3C-SiC(001) wafer Wenhong Wang, Fumiyoshi Takano, Hironori Ofuchi and Hiro Akinaga Effects of proton irradiation on the magnetic properties of GaGdN and GaCrN J K Hite, K K Allums, G T Thaler, C R Abernathy, S J Pearton, R M Frazier, R Dwivedi, R Wilkins and J M Zavada