Sample records for atarashii sentai kensaho

  1. Development of the hull inspection robot (RTV-SHIP); Sentai kensayo suichu robot (RTV-SHIP) no kaihatsu (atarashii sentai kensaho no ichiteian)

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    Nakata, Y.; Otsuka, M.; Ozawa, H.; Konosu, M. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)


    A compact and lightweight underwater RTV robot (RTV-SHIP) that enables the remote sensing in the double-shell structure of a tanker and the six-freedom motion control was developed based on the technology of the conventional portable underwater robot. The motion performance test in a water tank showed that the RTV-SHIP can freely access the manhole in the double-shell structure of a tanker and completely satisfies the thrust and swing force required for movement and measurement in a tank. The in-tank function confirmation test also shows that the main measurement items such as positioning in the tank, large deflection of panels, and plate thickness have a satisfactory measurement accuracy and that the RTV-SHIP has the same tone discrimination function as for a visual check. The method of inputting the tank shape during measurement and miniaturizing the recording unit should be improved until the RTV-SHIP is put to practical use. This system can be widely used by improving the above points according to the result of a future measurement test for the actual ships. 1 ref., 9 figs.

  2. Light-weight structure of hulls; Sentai keiryoka kozo

    Energy Technology Data Exchange (ETDEWEB)

    Tomita, Y. [Osaka University, Osaka (Japan). Faculty of Engineering; Matsuoka, K. [Ship Research Inst., Tokyo (Japan)


    Current trends of light-weight materials for hulls are reviewed. High-tensile steel has been used for light-weight ships over 10,000 tons, while FRP or Al alloy for light-weight ships under 1,000 tons. For light-weight ships between 1,000 and 10,000 tons, although Al alloy has some problems to be solved such as weldability, corrosion resistance and strength, it is effective to reduce welding works, by use of extruded Al alloy materials for example, from the viewpoint of strength enhancement and construction cost reduction. Brazed honeycomb sandwich panels are already in use, and a use of hollow sandwich extruded materials is in promotion. On the other hand, no high-tensile steel is in use for ships under 10,000 tons because of no weight reduction effect due to a large reserve thickness against corrosion. In order to promote weight reduction by use of high-tensile steel, further integrated studies on some problems such as reserve thickness, welding process, stress concentration and residual stress are necessary. 14 refs., 3 figs.

  3. New trends in biotechnology. Biotechnology no atarashii choryu

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    Karube, I. (The University of Tokyo, Tokyo (Japan). Research Center for Advanced Science and Technology)


    This paper focuses on application of the recent biotechnology and introduces its new trends. What has triggered the boom in the application is when the technology has been applied to medicines in the 1970's. Beginning with insulin and interferon, various fibrinolytic agents including tPA and monoclonals have been put on markets one after another in 1991. Progress in humangenomic analysis has led to implementation of gene therapies and diagnoses using genes on gene diseases. Sweeteners used in a large quantity in the foodstuff field are fructoses made by isomerizing glucose produced by using enzymatic bioreactors. Needless to say about production of amino acid, organic acids, saccharides, antibiotics, steroids, and nucleic acid-based compounds by using enzymatic bioreactors, chemicals including acrylic amide from acrylonitrile, enzyme detergents, and bio-herbicides are available commercially. Progress in the technology is seen in all of the fields, including electronics industry and environmental preservation. 6 refs., 4 figs.

  4. Hydrodynamic interaction between hull and hydrofoils; Sentai to suichuyoku no ryutai rikigakuteki kansho ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Kataoka, K.; Ando, J.; Nakatake, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    To correctly understand the change of attitude of a high speed boat provided with hydrofoils, it is essential to establish the interaction between the hydrofoils and the hull. This article relates to a very high speed domain with a field number in the vicinity of Fn=1.0, where a resistance test is performed with sinkage or trim left totally unconstrained and, on the other hand, another is performed using the Rankine Source method with attention paid primarily to the change of attitude, and the results of the two tests are compared for the clarification of the hydrodynamic mechanism by which sinkage and trim are produced. Next, numerical computation is performed about wave-making resistance and change of attitude for a Wigley model provided with two hydrofoils respectively at the fore and aft, for the hydrodynamic evaluation of impact on the hull exerted by the presence or absence of the hydrofoils. From a numerical computation using the Rankine Source method, results involving the change of attitude are attained, which agree very well with experimental values, up to Fn=1.0. Beyond Fn=1.0, however, both experiment and computation grow increasingly difficult to perform, and fail to yield values to agree with each other. 14 refs., 15 figs.

  5. Fluid dynamic interface between hull and hydrofoil; Sentai to suichuyoku no ryutai rikigakuteki kansho ni tsuite

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    Kataoka, K.; Ando, J.; Nakatake, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    For the high-speed ship with hydrofoil, it is important to grasp the mutual interference between its hydrofoil and hull. In this study, effects of the state of hydrofoils and velocity on the hull were fluid-dynamically investigated through the numerical calculation by means of Rankine source method using a Wigley model with two hydrofoils. Before considering the model with hydrofoils, the attitude change of a hull without hydrofoils during traveling in high-speed was examined. For the high-speed ship, various measuring systems have been conceived due to the large change in its attitude. The Wigley model has been used for the numerical calculation when considering the attitude change in the medium- and low-speed regions. In this study, resistance tests without constraining the sinkage and trim were conducted using a Wigley model in the high-speed region around Fn=1.0, which have not been usually conducted. The attitude changes were compared with the numerical calculation results by the Rankine source method. The wave making resistance and attitude change of the Wigley model with hydrofoils were also calculated. 12 refs., 10 figs.

  6. 戦後美術教育論の検討 : イメージと感情の発達研究へ


    山田, 康彦


    This papey aims to point out the new direction needed in the study of art education through reviewing the arguments presented by "Sozobiiku-Kyokai," "Atarashiie-no-kai" and "Bijutsu-kyoiku-o-susumerukai." The point in the controversy between "Sozbbiiku-kyokai" and "Atarashiie-no-kai" was, after all, how to comprehend the relation between cognition and feelings. "Bijutsukyoiku-o-susumerukai" lays stress on the developmental study of images and imagination. Sakae Ikeda of "Atarashiie-no-kai" at...

  7. Micro-chemistry. New current in chemistry; Maikuro kagaku. Kagaku no atarashii choryu

    Energy Technology Data Exchange (ETDEWEB)

    Masuhara, H. [Osaka University, Osaka (Japan). Faculty of Engineering


    In achieving artificial reaction in micrometer orders as in reactions in cells of living organisms, several results have been obtained in its specific methods. These results lead to an expectation on search and elucidation of new chemical phenomena, and development to structuring micro-chemical systems. This paper illustrates the basic conception thereof, and a large number of examples of the methods. Researches on the methods may be represented by a large number of results as follows: a position with as high reactivity as 3 {mu} meters in resolution has been utilized by utilizing the fact that such reaction intermediates as radicals and ions are produced with long life during laser explosion and erosion of polymers, for example; micro selective growth of CVD thin films was realized by using a lithographic method; developing an electrochemical reaction only beneath a chip under an scanning electrochemical microscope has produced successfully a space distribution of 0.5 {mu} meter in a reaction product; and optic-chemical processing of microfine particles and micro time analysis were performed successfully. 1 ref., 5 figs.

  8. Synthesis of heterocycles from disubstituted cyanamides; Fukugokan kagobutsu no atarashii goseigenryo toshiteno jiokikaeshianamido

    Energy Technology Data Exchange (ETDEWEB)

    Shibuya, I [National Institute of Materials and Chemical Research, Tsukuba (Japan)


    Authors have studied on the reactivity of disubstituted cyanamides as comparison with nitriles, and researched the possibility as starting materials for synthesizing heterocycles containing nitrogen for the last decade. As the result, many new reactions, not observed in nitriles, have been developed as shown in the below, and it was found that the disubstituted cyanamides are usefull materials for synthesizing heterocycles. At first, in compressed liquid phase (500{approx}800MPa), the reaction with amidoximes or N-substituted formamides afforded 1,2,4-oxadiazoles (2,3) or 2-substituted amino-4, 6-bis (di-substituted amino)-1,3,5-triazines with liberation of secondary amines. respectively. In the reaction with carbon disulfide, 4-thiocarbamoyl amino-1,3,5-thiadiazines, (6) were obtained in one-pot. In the initial stage of the reaction, thiocarbamoyl isothiocyanates, an adduct of carbon disulfide and a disubstituted cyanamide, seem to have been formed. On the other hand, the reaction with aryl isothiocyanates gave 2-disubstituted amino-quinazolines (13), and the reaction mechanism was also discussed. Next, the reaction with the organic cations was examined. Disubstituted cyanamides react with (dichlormethylene) dimethylammonium chloride to give 1-(disubstituted amino)-3- dimethylamino-1,3-dichloro-2-azapropenium chlorides, and these products were applied to the synthesis of heterocyclic cations containing S or Se (14,15,16, and 17). Thiocarbamoyl anilides were desulfurized by using a silver salt in the presence of a disubstituted cyanamide to give 4-disubstituted aminoquinazolines (18) in good yields. (author)

  9. Synthesis of new erodable polymers response to environmental stimuli; Atarashii kankyo chowagata bunkaisei plastic no kaihatsu

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    Kato, M.; Nagasaki, Y. [Science University of Tokyo, Tokyo (Japan). Faculty of Industrial Science and Technology


    This report relates to the designing of functional materials that decompose in response to various signals. A derivative of {alpha}-bromomethylstyrene is caused to act on the living anions of {alpha}-methylstyrene for the synthesis of a pyrolytic polymer having unsaturated groups at its terminals. The terminal double combinations of this polymer split under the influence of heat, acid, or base for depolymerization which is quantative, and the decomposition temperature may be controlled by replacing terminal phenylallylic groups with methyl groups or phloro-groups. Furthermore, a novel polythyramine polymer is synthesized with its principal chain constituted of NCH2CH2Si, the principal chain easy to disintegrate when exposed to an electron beam. The polymer is signal-responsive and may be patterned by use of an electron beam. As a temperature-responsive polymer with the hydrolytic feature controlled, poly(thyroxy ethylene glycol) is obtained from a derivative of diaminosiloxane and oligo-oxyethylene. This is a high-mobility, temperature-responsive material whose hydrolysis may be controlled. 3 refs., 2 figs.

  10. Simulation on slamming of a vessel by CIP method; CIP ho ni yoru kogata sentai no slamming gensho no simulation

    Energy Technology Data Exchange (ETDEWEB)

    Tajima, M.; Yabe, T. [Tokyo Institute of Technology, Tokyo (Japan); Watanabe, K. [Gunma University, Gunma (Japan)


    Impact of a vessel on water surface is simulated by the CIP (Cubic-Interpolated Pseudoparticle/Propagation) scheme. The simulation demonstrates that air layer between vessel and water surface plays an important role to determine the pressure profile. In particular at small impact angle, air flow along this layer between vessel and water gains speed sufficient to induce the Kelvin-Helmholtz instability which leads to a water wave of small wavelength. Because of this air layer, the maximum pressure is largely reduced at the small impact angle compared with Wagner`s theory and becomes much closer to Chuang`s experiment. 8 refs., 8 figs.

  11. Shell strength of a large wooden ship subject to external pressure. Ogata mokusei sentai sotoita no suiatsu ni taisuru kyodo

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, Y. (Science University of Tokyo, Tokyo (Japan) Faculty of Engineering); Maruyama, S. (Defence Agency, Tokyo (Japan)); Hori, T.; Inoue, K.; Iwata, S.; Majima, Y.; Suetsugu, K. (Hitachi Zosen Corp., Osaka (Japan))


    Strength of the shell subject to external pressure is experimentally and theoretically studied for an about 70 m long wooden ship with triple skin planking. By using a half scaled wooden model, static pressure test, cycle fluctuating pressure test, destructive test and three-dimensional frame analyses and beam analyses were conducted and a reasonable way of estimation was searched. No damage was found at the static and the cycle fluctuating load tests, confirming the structure has sufficient static and fatigue strength. No rapid collapse occurred in the range of the pressures by the destructive tests. The deflections and stresses by the experiments are expressed fairly well by the three-dimensional frame model which takes account the elastic deformation of fixing bolts and also the lateral compression of frames having widths. The shear rigidity due to a group of fixing bolts is expressed by a bending beam element. The deflectional mechanism of the triple skin planking is well explained by the newly introduced diagonally crossing continuous beams, and also by the single continuous beam which gives equivalent results. 3 refs., 21 figs., 1 tab.

  12. Suppression of numerical dispersion using FD modified operators; Atarashii sabunho no enzanshi wo mochiita suchi bunsan no yokusei

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    Takeuchi, N.; Geller, R. [The University of Tokyo, Tokyo (Japan). Faculty of Science


    The author, et al., have developed a formal evaluation theory for errors in numerical solutions and derived on the basis of this theory the conditions that a modified error minimizing operator should satisfy. A modified operator was derived for a calculus of finite difference in the time domain making use of this error evaluation theory. In this study, a modified operator was derived for O (2, 2) in the calculus of finite difference in time, and the operator was used in the calculation for the old and new methods about 1-dimension inhomogeneous media, and the two were quantitatively compared in CPU time and calculation accuracy. The calculation used 500 space grids and 5000 time grids. With the ratio of the time grid gap and space grid gap are kept constant, both CPU time and calculation accuracy were in proportion to the square of the number of grids. It was found in view of the result that the new method, as compared with the old method, needs only approximately 1/20 of CPU time in performing calculations of the same precision and that it maintains calculation accuracy that is approximately 20 times higher in the said CPU time. 4 refs., 2 figs., 1 tab.

  13. Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu

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    Nakamura, T.; Noguchi, F.; Takasu, T.; Ito, H. [Kyushu Inst. of Technology, Kitakyushu (Japan). Faculty of Engineering


    In the refining process for the production of copper from pyrites, heat treatment is carried out in a neutral atmosphere so that part of the sulphur will be collected in the form of simple sulfur and that pyrites naturally low in reactivity will be made active. A basic study is also conducted of a very high speed electrolytic method. The chemical aspects of pyrites which are various in composition (mainly CuFeS2) are clarified by X-ray diffraction, and then is subjected to heat-treatment in a 773K-1073K argon atmosphere. There is a decrease in the amount of sulfur at a temperatures not lower than 973K. The X-ray main diffraction line splits for the emergence of some lower angle diffraction lines. The specimen is then subjected to a leach test in a copper chloride base liquor, to disclose that leachability grows remarkably higher in the presence of a great change in the X-ray diffraction lattice constant. An experiment follows in which an electrolyte is allowed to flow at a high speed for accelerating the rate of electrolytic refining in an effort to prevent the passivation of anode and deposition of dendrite on the cathode that is apt to occur when the current density is high. Passivation is prevented when the flow rate is 10m/min or higher in the vicinity of the anode surface for the formation of a smooth electrodeposited surface. 2 refs., 2 figs., 2 tabs.

  14. Development of novel processes for Cu concentrates without producing sulfuric acid; Hiryusan hasseigata no atarashii doshigen shori gijutsu no kaihatsu

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    Awakura, Y.; Hirato, T. [Kyoto University, Kyoto (Japan)


    Studies are conducted to develop a new wet method for copper concentrates to replace the conventional dry smelting method for the settlement of problems involving the processing of impurities for environmental protection. A specimen of pyrites polycrystals is subjected to leaching at 80 {degree}C in a strongly acidic cupric solution. Findings are that the element sulfur generated in this process does not impede leaching and only approximately 4% of the sulfur is oxidized into sulfur ions; that the presence of more than 2g/liter of bromide ions produced during bromine-aid leaching of gold changes the structure of sulfur for the inhibition of leaching; that circulation of a bromine-containing leaching liquid is not desired since even a small amount of approximately 0.02mol/liter inhibits the leaching rate. Controlled potential electrolysis is performed for the anode in an acid solution containing CuCl, NaCl, and NaBr, for the observation of oxidation/reduction potentials predicted by Nernst`s equation. It is then disclosed that bromine is more effective than chlorine in gold leaching and that the solution potential during leaching agent regeneration enables the monitoring of solution constitution. 2 refs.

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

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    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.

  16. Numerical estimation of interactions between foils and hulls of hydrofoil catamaran; Suichu yokutsuki sodosen no sentai to suichuyoku no sogo kansho

    Energy Technology Data Exchange (ETDEWEB)

    Kataoka, K.; Ando, J.; Nakatake, K. [Kyushu University, Fukuoka (Japan)


    The hydrofoil catamaran model which is built up with the twin Wigley hulls and the tandem fore and aft set of hydrofoils is used for the numerical calculation and the experiments of this model was performed at Kyushu University. In this paper, combining with a Rankine source method, the SQCM (a simple panel method) is applied to the unsymmetrical flow problem around catamarans. And the running attitude of the model is not fixed in both the calculation and the experiments. Comparing with the experiment we show the interaction between hulls and the hydrofoils for the lift and the wave-making resistance in the high speed range. 6 refs., 11 figs.

  17. Research trends of propulsion performance. Flow and drag around hulls; Suishin seino no kenkyu doko. Sentai mawari no nagare to teiko

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, T. [Osaka University, Osaka (Japan). Faculty of Engineering


    Research trends of flow and drag around hulls are reviewed on the basis of papers presented in FY 1993. Researches of flow around hulls by computational fluid dynamics (CFD) are continuously vigorous since last year, and measurement data gathering indispensable to evaluate CFD methods for flow fields is reviewed separately for each measurement of flow around hulls, interference flow and force acting on hulls. Computation results of flow by CFD are reviewed separately for viscous flow around hulls, flow around free surfaces, flow around local portions of hulls, interference flow and flow around simple configuration bodies. The type design of ships and its optimization are reviewed, and the fluid dynamics of high speed vessels including not only a planing vessel but also a displacement high speed vessel and a ground effect wing is reviewed separately for flow analysis around simple configuration bodies, fluid force acting on planing plates, that acting on ground effect wings and that acting on high speed vessels. 67 refs.

  18. In situ observation of skin. Novel photoacoustic spectrometric approach; Hikari to oto de hifu wo miru. Hikari onkyoho ni yoru atarashii apurochi

    Energy Technology Data Exchange (ETDEWEB)

    Takamoto, R. [Shiseido Co. Ltd., Tokyo (Japan)


    Author`s work is introduced on the title approach for in situ determining and evaluating percutaneous absorption of test substances as medicines into living human skin, precisely, easily, fast and safely. The research has been conducted with the following concept in order to remove noise that occurs when heat emitted on photo-absorption of substances into skin is tried to be determined by means of sonic waves transmitted by heat, and to develop sensors sensitive only to sound to be measured. First, since noise sounds such as pulse, environmental sounds distribute in a frequency range of tens to hundreds Hz, differentiation of sounds should be tried by making a frequency of photoacoustic(PA) signal high enough not to be affected by those noise. Second, PA cell structure should be designed to be resonate at specific, optimum frequency so as to be high-sensitive only to sounds that turn to PA spectrometric(PAS) signals. Third, noise components that intervene in spite of the above provisions should be subtracted. The acoustic cell of double resonance differentiation type that was developed according to the above concept was proved to be so excellent in the ratio of PAS/noise signals as 118. 8 refs., 2 figs.

  19. Travel time and ray path computation in 2D-heterogeneous structures; Fukinshitsu kozo ni okeru jishinha soji oyobi hasen no atarashii keisan hoho

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    Fujie, G.; Kasahara, J.; Sato, T.; Mochizuki, K. [The University of Tokyo, Tokyo (Japan). Earthquake Research Institute


    Methods were studied for determining the initial travel time and ray paths with stability when an non-linear travel time inversion is performed in an inhomogeneous structure. The travel time calculation was based on Faria and Stoffa`s method. First, the 2-dimension space was sectioned by grids, and `slowness` was assigned to all the lattice points. Starting from the vibration source, travel time at each lattice point is sequentially calculated. This method calculates travel time for any structure without breakup. In this study, an algorithm more sophisticated than the method of Faria, et al., was developed, and the improvement of travel time calculation accuracy led to the accurate determination of the direction of incidence into the lattice points during the initial motion. The calculation of ray paths was effected by tracing back from the receiving points the incidence into the lattice points or by following back the ray paths to the vibration source. This method performs stable calculation for a heavily inhomogeneous structure and, with the algorithm being simple, do the parallel programming as well. 1 ref., 6 figs., 1 tab.

  20. New style of system business and reengineering of software engineering process; Atarashii system jigyo style to software sekkei no gyomu kakushin

    Energy Technology Data Exchange (ETDEWEB)

    Minami, A.; Muto, K.; Dotemoto, A. [Toshiba Corp., Tokyo (Japan)


    Toshiba is promoting a new style of system business by business process reengineering (BPR), with the sales, engineering, and software development divisions acting in concert. Virtual task force teams are changing the styles of sales and engineering. They are supported by an intranet-based system for information management and C Solution, a new system architecture. (author)

  1. Development of new type of nonlinear optical materials with a function of ultrafast optical modulation; Chokosoku hikari reiki hencho kino wo motsu atarashii hisenkei kogaku zairyo no kaihatsu

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    Sakaguchi, H. [Shizuoka University, Shizuoka (Japan). Research Institute of Electronics


    Ultrafast modulation of second harmonies from a Langmuir-Blodgett film consisting of a ruthenium complex was demonstrated for the first time. The mechanism of the modulator of SHG intensity on laser irradiation was ascribed to the change of molecular hyperpolarizability of the ruthenium complex on going from the ground state to the excited state. 9 refs., 12 figs.

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

  3. Study on practical application of a longitudinal hull strength theory considering camber in cross section; Yokodanmen no sori wo koryoshita sentai tate kyodo riron no jitsuyoka ni kansuru kenkyu. 2

    Energy Technology Data Exchange (ETDEWEB)

    Nose, M.; Suzuki, K.; Furuno, H. [Nagasaki Institute of Applied Science, Nagasaki (Japan); Suzuki, K.


    Discussions were given on practical application of a stress analyzing method for thin-wall deformed cross-sectional beam considering cross section camber in longitudinal bending. The non-static calculation method described in the previous report can be applied to a box-type cross section having multi-connected cells, bulk cargo transport vessels and container ships with dual hull structure, and oil tankers with dual hull structure of medium size. The calculation method was capable of achieving remarkable enhancement in efficiency over that of conventional calculation methods. The present study is intended to make the method applicable also to multi-connected cross section shapes having more than one longitudinal partitions as used in dual hull VLCC and ULCC. As a result, an expanded non-static calculation system was developed, which has introduced into the conception described in the previous report a new conception of triple point and independent start point members. As a result of applying the method to dual hull bulk cargo transport vessels, container ships, dual hull oil tankers of medium size, VLCC and ULCC, it was verified that the system operated properly. Remarkable efficiency improvement has been made possible as compared with conventional analysis methods applied to individual ships. The system is capable of automatic calculation, and makes possible the practical application of the hull strength theory considering cross section camber. 3 refs., 10 figs., 1 tab.

  4. Utilization of statistical table for waves in North-west Pacific Ocean and a long-term estimation on hull responses; Seihoku Taiheiyo haro tokeihyo no riyo to sentai oto choki yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Shinkai, A. [Kyushu University, Fukuoka (Japan). Faculty of Engineering


    Designing a vessel to sail oceans for an extended period of time requires statistical estimation on different hull responses to waves. To meet the requirement, it is necessary to accurately identify hydrographic conditions (particularly waves) which are considered to be encountered by the vessel. This paper makes clear the statistical characteristics of the wave statistics table presented by Fang et al, and compares them with other processes for discussion. This statistics collection is based on data collected in China, Hong Kong and Japan, including those collected in the Sea of Japan, the Yellow Sea, the North Sea, the East China Sea and the South China Sea. It was found that these data provide results slightly lower than the long-term estimation values derived from data of the global wave statistics (GWS) prepared by Hogben et al. The cause for this was found attributable to the format of the statistical data, especially setting of wave height classes. However, since the data provided by Fang et al include items of detailed information on small sea areas near the Chinese coast lines, the data are thought to provide useful information source in investigating long-term hull response characteristics relative to spatial spread of the sea areas in the North-west Pacific Ocean. 15 refs., 5 figs., 2 tabs.

  5. Estimation of hydrodynamic forces acting on a ship in oblique towing by a simple surface panel method (SQCM); Kanbenna panel ho ni yoru shako sentai ni hataraku ryutairyoku no suitei

    Energy Technology Data Exchange (ETDEWEB)

    Ando, J.; Nakatake, K.; Maita, S. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Yamamoto, T. [Nippon Steel Corp., Tokyo (Japan)


    A simple surface panel method (SQCM) has been developed, by which the Kutta condition can be satisfied to calculate wing performance for repeated calculation of three-dimensional wing in a short time. The SQCM was applied to performance evaluation of two-dimensional and three-dimensional wings, to compare with the other panel methods and experimental results. Valid results were obtained by the SQCM. The SQCM was applied to estimation of hydrodynamic forces acting on a ship in oblique towing. Three VLCC models (SR221-A, B, C) having different aft shapes each other were used for this study. Pressure distributions on the hull surface, and transverse force and moment distributions acting on the hull were calculated. Obtained calculated results were compared with the experimental values. Thus, effectiveness of this method was examined. As a result, it was found that whole trends of pressure distributions and transverse force distributions of hydrodynamic forces acting on a ship in oblique towing can be estimated. However, the estimation accuracy of hydrodynamic forces, especially the moment, was not enough due to the locally defective pressure distributions. It was suggested that the vortex model has to be improved. 10 refs., 1 tab.

  6. Cavitation erosion tests of high tensile stainless steels for the Techno-Superliner (TSL-F) hulls; Techno superliner (TSL-F) sentai kozoyo kokyodo stainless ko no cavitation erosion

    Energy Technology Data Exchange (ETDEWEB)

    Matsuo, M.; Ito, H.; Shibasaki, K. [NKK Corp., Tokyo (Japan); Mizuta, A.; Sugimoto, H. [Kawasaki Heavy Industries, Ltd., Kobe (Japan); Tomono, Y. [Hitachi Zosen Corp., Osaka (Japan)


    Investigations were given by using the magnetostrictive vibration method and the high-speed fluid testing method on cavitation erosion resistance of high-tensile stainless steels thought to have high applicability to submerged hull structures of Techno-Supeliner (TSL-L). The investigations revealed that these steels have nearly equivalent resistance to even SUS 304 or 15-5PH steel which is thought to have the highest cavitation erosion resistance among the conventional materials used customarily. An experiment using both materials provided a result different quantitatively but similar qualitatively in relative merits between the materials. Correlation between both materials was presented. A cavitation erosion experiment using a 1/6 scale model of the actual TSL-F was carried out to measure the amount of cavitation erosion generated on wing surfaces. Results from the experiment were used to attempt estimation of cavitation erosion amount at the level of the actual TSL-F. 21 refs., 12 figs., 3 tabs.

  7. Transformation hardening by linear-polarized laser beam. Report 2. Development of novel laser beam shaping optics and its applications to materials processing; Chokusen henko reza wo mochiiru hentai koka. 2. Atarashii reza shaping kogakukei no kaihatsu to sono oyo

    Energy Technology Data Exchange (ETDEWEB)

    Miyamoto, I.; Maruo, H. [Osaka Univ., Osaka (Japan)


    Shape variable laser beam shaping optics for which linear polarized beam is utilized is applied to the hardening of carbon steel by CO2 laser beam to analyze the absorptivity. In addition, linear polarized beam is irradiated to inclined materials for laser hardening to analyze the depth of hardening and the distribution of temperature. The absorptivity of random polarized beam by the bare specimens is as low as 20%. It is as high as above 40% with the graphite coated specimen, but is nearly constant with no dependence on the angle of incidence. The absorptivity in p-polarization increases with the increase in the angle of incidence. When linear polarized beam is used, the total efficiency of the bare specimen becomes high by about 1.5 times that of the graphite coated specimen subjected to random polarized beam. Hardening of bear material by laser beam is quite possible when p-polarization is employed. An approximation equation is derived with which the temperature distribution and hardened depth can be obtained easily if beam distribution and absorptivity are given, and it is applied to the evaluation of laser hardening of inclined specimens using linear polarized beam. 22 refs., 11 figs., 1 tab.

  8. 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

    Energy Technology Data Exchange (ETDEWEB)

    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.

  9. Survey report of FY 1997 on the trends of novel CO2 fixation technology using bacteria and microalgae; 1997 nendo chosa hokokusho (saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa)

    Energy Technology Data Exchange (ETDEWEB)



    For this survey, the latest technology trends relating to microbial functions are summarized to recover and effectively utilize CO2, typical greenhouse effect gas, using microbial functions. Systematic survey and analysis are conducted concerning the microorganisms useful for fixing CO2, CO2 uptake mechanism during the microbial reactions, utilization methods of solar light and useful energy sources except solar light, highly efficient production of useful materials, and usage of produced useful materials. Research has concentrated on use of biological activities for this purpose through design of bioreactors using microorganisms (bacteria and microalgae) for efficient CO2 fixation. For the process to have net CO2 fixation as assessed by its life cycle and to make the process economically feasible, it is essential not only to fix CO2 merely in the form of biomass but in addition to convert it to useful materials by the catalytic activities of the organisms. Three categories were set for the survey, i.e., microorganisms with CO2 fixation ability, available energy for CO2 fixation, and target CO2 fixation products. 169 refs., 49 figs., 14 tabs.

  10. Survey report for fiscal 1998. Survey of trends of new CO{sub 2} fixation technology using bacteria and algae (II); 1998 nendo chosa hokokusho. Saikin sorui wo riyoshita atarashii nisanka tanso kotei gijutsu no doko chosa

    Energy Technology Data Exchange (ETDEWEB)



    The trend of technology is surveyed from a standpoint that, in the process of CO2 fixation using microbes for the production of useful substances, it is essential, in view of income/outgo balance and economy, to utilize their catalytic function. The survey centers about the feasibility of the utilization of organic wastes, cellulose wastes in particular, as an energy source. Special attention is paid to the energy of artificial light and laser beams. From a point of view that it is important to suppress cell multiplication and to effectively utilize only catalytic activity for the production of useful substances, the cell division mechanism of the Corynebacterium is analyzed, and the findings are compiled to facilitate the study as to whether the division may be controlled. A report is also prepared on the metabolic mechanism of a photosynthesizing bacterium that is judged to be the most promising species. Reference is made to aerobic and anaerobic bacteria. Shown are the organic compounds that are formed by CO2 gas fixation thanks to microbial or enzymatic reactions. To emphasize their importance as an energy source and to explain the conversion of biomass into useful substances, the technology and economy of conversion into fuel compounds are surveyed. The production of ethanol out of organic wastes is evaluated in the way of LCA (life cycle assessment). (NEDO)

  11. Fundamental study on smart structure approach to marine structure. Part 1. Novel methods for fiber-optic measurement of displacement and damage; Smart structure gainen no sentai kozo eno tekiyo ni kansuru kiso kenkyu. 1. Hikari fiber ni yoru hen`i to sonsho no kenshutsu hoho no kento

    Energy Technology Data Exchange (ETDEWEB)

    Kageyama, K.; Kanpara, I.; Suzuki, T.; Osawa, I. [The University of Tokyo, Tokyo (Japan); Shimamura, T. [Toshiba Corp., Tokyo (Japan)


    Applicability of a smart structure concept to marine structure is discussed in the present paper. Fiber-optic velocity sensor has been developed based on Laser-Doppler effect. The novel method has some advantages to marine structures, such as (1) long gage length, (2) temperature independent output and (3) excellent dynamic response, which are not achieved in conventional interferometric fiber-optic sensors. Deformation of tensile specimen under cyclic load, vibration of cantilever beam specimen were measured with the fiber-optic velocity sensor, and the results were compared with those of strain gages. Good performance of the fiber-optic velocity sensor was demonstrated in the present experiments. OTDR (Optical Time Domain Reflectometer) has been applied to detection of damages in the specimens. Tensile test of single optical fiber embedded in a resin, tensile and flexure tests of glass fiber reinforced composite specimens were carried out, and the damages of embedded optical fibers were detected by OTDR. Relations between reflection response with OTDR and applied strain in resin and composite specimens were examined experimentally, and the effects of materials and stacking sequence of laminates and loading conditions on OTDR response were investigated. 11 refs., 19 figs.

  12. Study on effect of bow shape on icebreaking resistance. 2nd Report. Relationship between hull motion and icebreaking resistance in high speed range; Saihyo teiko ni oyobosu senshu keijo no eikyo ni kansuru kenkyu. 2. Kosokuji no sentai undo to saihyo teiko no kakawari

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Y.; Uemura, O.; Kato, H.; Yamaguchi, H. [The University of Tokyo, Tokyo (Japan); Izumiyama, K. [Ship Research Inst., Tokyo (Japan)


    The effect of ship speed on icebreaking resistance is investigated. The video photographs show that vertical motion of the bow is more noted as ship speed increases. It is expected that there is a correlation between average upward movement of the bow and amplitude of its vertical motion, and the effect of vertical motion of the bow on icebreaking resistance is investigated. It is found that increasing ship speed increases both vertical movement of the bow and amplitude of its vertical motions, and increases icebreaking resistance; the pressure component generated by rotation of broken ice pieces is one of the reasons for increased icebreaking resistance; ice piece rotation speed is determined by hull inclination angle at the hull/ice contact point, and ice piece size by bow waterline angle and curvature; and spoon bow increases in icebreaking resistance more slowly as ship speed increases than the other bow shapes, because of its larger bow waterline angle and more gentle waterline curvature to give wider but shorter ice pieces, and hence a smaller hull inclination angle at the hull/ice contact point. 4 refs., 13 figs.

  13. Investigation of the creation of functional surfaces and the recent development in related researches. 2. Investigation of the development of new isolation/refining systems in water system; Kokino hyomen no sosei to shintenkai no kenkyu doko chosa. 2. Suikei ni okeru atarashii bunri seisei system no kaihatsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)



    Propositions were made concerning new chromatography and membrane separation techniques wherein a command control material is used, the mobile phase is fixed upon water, and the fixed phase is caused to vary by external commands, and how to develop the said techniques into a project was discussed. New methods were also introduced, capable of separating water systems and, particularly, capable of separating and refining, without damaging their functions, bionic elements such as proteins, genes, and cells, which encouraged discussion on the future of the said project. As for command controlled materials, detailed investigations were conducted into materials responsive to physical stimulation such as light, electric field, magnetic field, or heat and materials responsive to PH and chemical or biochemical substances, and discussion was made on the structures and characters of the said materials. Concerning the manufacture of a command controlled surface, consideration centered particularly about the density and thickness of command controlled molecules to be introduced onto the surface. Furthermore, the current state and problems were discussed regarding chromatographic separation and refining of optical isomers, nucleic acids, physiologically active substances, peptides, cells, etc. 252 refs., 75 figs., 31 tabs.

  14. Craie, brique, verre : Un essai sur l'expérience matérielle de l'architecture


    Sasaki, Ken-ichi


    Ce que je propose ici n'est pas une étude scientifique mais un simple essai spéculatif sur l'architecture; il est hors de ma compétence actuelle de développer une étude technique sur ce sujet. Toutefois je sentais depuis longtemps, en tant qu'esthéticien, la nécessité absolue de penser à l'architecture, qui nous procure une expérience bien différente de celles que nous donnent les autres arts. La théorie d'esthétique, notamment celle de l'expérience esthétique est le plus souvent constituée, ...

  15. Hernie de Spiegel: a propos dun cas


    Karim Ibn Majdoub Hassani; Fatimzohra Zahid; Hicham Anoune; Imane Toughrai; Said Ait Laalim; Khalid Mazaz


    La hernie de Spiegel ou hernie ventrale latérale est une déhiscence inhabituelle apparaissant sur la ligne ou fascia semi-lunaire de Spiegel. C’est une entité clinique rare, représente 0.10 à 1 pourcent des hernies. Aussi, nous a-t-il paru opportun de rapporter ce cas colligé dans le service de chirurgie B du CHU Hassan II de Fès. Nous rapportons l’observation d’une patiente âgée de 60 ans, sans antécédent particulier qui présentais une tuméfaction para ombilicale gauche augmentant progressiv...

  16. Hernie de Spiegel: a propos d’un cas


    Majdoub Hassani, Karim Ibn; Zahid, Fatimzohra; Anoune, Hicham; Toughrai, Imane; Laalim, Said Ait; Mazaz, Khalid


    Introduction: La hernie de Spiegel ou hernie ventrale latérale est une déhiscence inhabituelle apparaissant sur la ligne ou fascia semi-lunaire de Spiegel. C’est une entité clinique rare, représente 0.10 à 1% des hernies. Aussi, nous a-t-il paru opportun de rapporter ce cas colligé dans le service de chirurgie B du CHU Hassan II de Fès. Patient et observation: Nous rapportons l’observation d’une patiente âgée de 60ans, sans antécédent particulier qui présentais une tuméfaction para ombilicale...

  17. Hernie de Spiegel: a propos d’un cas

    Directory of Open Access Journals (Sweden)

    Karim Ibn Majdoub Hassani


    Full Text Available La hernie de Spiegel ou hernie ventrale latérale est une déhiscence inhabituelle apparaissant sur la ligne ou fascia semi-lunaire de Spiegel. C’est une entité clinique rare, représente 0.10 à 1 pourcent des hernies. Aussi, nous a-t-il paru opportun de rapporter ce cas colligé dans le service de chirurgie B du CHU Hassan II de Fès. Nous rapportons l’observation d’une patiente âgée de 60 ans, sans antécédent particulier qui présentais une tuméfaction para ombilicale gauche augmentant progressivement de volume, Une hernie de Spiegel a été suspectée à l’examen clinique, et le diagnostic d’éventration antérolatérale gauche a été retenu à la tomodensitométrie abdominale. Une cure de la hernie par plaque de prolène a été réalisée et les suites opératoires étaient simples. La hernie de Spiegel est une affection rare, son diagnostic clinique peut être difficile. Elle est asymptomatique dans 90 pourcent des cas et Son diagnostic positif est radiologique. Le risque d’étranglement non négligeable impose un traitement chirurgical une fois le diagnostic est confirmé.