WorldWideScience

Sample records for anteisei ni kansuru

  1. Ab initio MO study on the thermal stability of 1-phenyl-1H-tetrazoles; Hikeikenteki bunshi kidoho ni yoru 1-Ph-1H tetorazoru yudotai no netsu anteisei hyoka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ono, Yoshio.; Akutsu, Yoshiaki.; Arai, Mitsuru.; Tamura, Masamitsu. [The University of Tokyo, Tokyo (Japan). School of Engineering; Matsunaga, Takehiro. [National Institute of Materials and Chemical Research, Tsukuba (Japan)

    1999-06-30

    Ab initio MO calculations of 1-phenyl-1H-tetrazoles were carried out, in order to explain a substituent effects on its high thermal stability and to estimate the thermal stability of the other tetrazoles. Similar to 1H-tetrazole, five bonds in the tetrazole ring have intermediate lengths between single and double bond lengths. Phenyl and tetrazole rings are not both on one plane showing no interaction. Three indexes addopted as a measure of thermal stability indicate that the more equal the bond lengths of the ring are and that the bigger the stabilization energy by ring formation is, the more thermally stable they are. It is found out that there is the relationship between the thermal stability and the ring charge. That is, the more negative the ring charge is, the more thrmally stable the tetrazole is. Also, there is a good relationship between the thermal stability and the energy level of orbital of which orbital is an anti bonding type with respect to the N3-N4 bond. The higher the energy level is, the more thermally stable the tetrazole is. (author)

  2. Investigation into introduction and promotion of clean energy cars; Clean energy jidosha no donyu sokushin ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Gazing the introduction target for fiscal 2000 and 2010, the paper arranged comprehensively and systematically the trend in Japan and overseas of clean energy cars and described subjects. Themes of the study to be promoted in terms of electric cars are: Li secondary batteries, heightening of performance of batteries such as Ni-hydrogen, power generation/power storage hybridization to make the long-distance travel possible. For the price reduction, the body is so made as to make it possible to select three kinds of power unit, that is, gasoline, hybrid, and electricity. Low noise and easy operation are also important. As to natural gas vehicles, the price is more than three times as high as that of gasoline vehicles, and relaxation of the related regulations on metal tanks, the Road Traffic Act, etc. is necessary. It is indispensable to establish quantity production and technical standards and reduce cost by the remodeling for bi-fueling with gasoline engines, development of FRP tanks, etc. Methanol vehicles are the closest to gasoline vehicles, but the introduction is delayed having no groups for generalization. Solar and hydrogen cars are promising, but are on a stage of developing the basic technology. 43 figs., 104 tabs.

  3. Study of highly efficient power generation system based on chemical-looping combustion; Chemical loop nenshoho ni yoru kokoritsu hatsuden system no kaihatsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ishida, S.; Suzuki, T.; Yamamoto, M. [Tokyo Institute of Technology, Tokyo (Japan). Research Laboratory of Resources Utilization

    1997-02-01

    This paper describes the research and development of power generation system by means of chemical-looping combustion. For this system, fuel flows in a reduction reactor and air flows in an oxidation reactor. These two flows are separated. As a result, recovery of CO2 without energy consumption, drastic improvement of power generation efficiency, and suppression of NOx emission are expected. To realize the above, two promising candidates, NiCoO2/YSZ and NiO2/NiAl2O4, have been found as recycle solid particles between the both reactors. These have excellent oxidation/reduction cycle characteristics. By these particles as well as the existing particle, NiO/YSZ, practical application of the chemical-looping combustion is realized. Besides LNG, coal and hydrogen were considered as fuels. When using coal or hydrogen, it was found that temperature of the reduction reactor should be increased the same as that of the oxidation reactor. This is a different point from a case using LNG as a fuel. 5 refs., 2 figs.

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

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

    1999-07-25

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

  5. Study on the cutting of self-fluxing alloy of Ni-Cr-WC systems. Ni-Cr-WC kei jiyo gokin yosha himaku no sessaku kako ni kansuru kenkyu

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    Inui, Y.; Hayami, T.; Kubohori, T.; Ikuta, T. (Kinki University, Osaka (Japan). Faculty of Science and Technology)

    1991-03-31

    In this paper, to investigate the cutting of sprayed self-fluxing alloy films of Ni-Cr-WC system containing 35 and 50%WC-Co composite grains in the Ni-Cr matrix, cutting tests by the lathe turning method were performed using CBN tools containing either oxide or carbonitride systems as a binder. Self-fluxing alloy films with about 2mm thichness, which were sprayed on the surface of a cylindrical substrate made of low carbon steel, were used as cutting materials. The wear was increased rapidly at the early stage of cutting, but this was changed to the gradual increasing level after about 30 seconds of cutting. The tool was subject to the abrasive action in cutting, and was fractured when CBN content was low. The CBN tool containing oxide system was found most suitable for cutting of these alloys. The variation in resistance to cutting was observed at the early stage, but this was disappeared after 90 seconds. The roughness of the cutting surface was decreased with cutting time. 8 refs., 10 figs., 2 tabs.

  6. Fiscal 2000 survey report. Basic research on metallic peptides in marine organisms and microbes; 2000 nendo kaiyo seibutsu oyobi biseibutsu no kinzoku ketsugo pepchido ni kansuru kisoteki kenkyu hokokusho

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    NONE

    2001-03-01

    Research is conducted to collect findings on new metallic peptides and proteins which will work effectively in the bio-remediation of heavy metal pollution and in the collection of useful metals. In this fiscal year, primary evaluation methods for metal resistant bacteria are prepared so as to discover new metallic peptides, sampling was carried out at four sites which are characteristically different from each other, and more than 100 strains of metal resistant bacteria were obtained. Out of them, Ni enriched bacteria whose growth is accelerated in the presence of Ni and like others were found out. In another effort, a high concentration Cr resistant bacterium was examined, and it was learned that it exhibits its resistance by reducing hexavalent Cr to trivalent Cr. The denaturing gradient gel electrophoresis (DGGE) method was applied to the analysis of a culture process involving metal addition and accumulation, and the result indicated that a study of details of accumulation culture conditions would be necessary to find out strains that remain undiscovered. It is expected that peptides equipped with sophisticate functions may be obtained when details including sampling points are studied and the result is fed back to the sampling process. (NEDO)

  7. Study of selective oxidation of methane catalyzed by solid superacid in unique reaction field; Tokushu hannoba no kotai chokyosan wo mochiiru methane no sentaku sanka hanno ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Misonoo, M.; Tatsumi, T.; Mizuno, T.; Inumaru, T. [The University of Tokyo, Tokyo (Japan)

    1997-02-01

    Selective oxidation of lower alkanes by use of heteropolymeric compounds is studied. Alkanes are activated on Cs2.5H0.5PW12O40 serving as catalyst, and their activity and selectivity improve when the catalyst is developed into a dual function catalyst in which Cs and Pt are combined. A success is reported of the synthesis of a heteropolymeric acid in which two molecules of the coordination element wolfram are replaced with a transition metal of the first period, on which acid the oxidation of cyclohexane is enhanced. Cs2.5Ni0.08H1.34PVMo11O40 as a metal/heteropolymeric acid dual function catalyst enables the direct oxidation (9% recovered at 340{degree}C) of isobutane into a methacrylic acid, which is attributed to the harmonious coordination of the oxidizing work of the catalyst and acidity. It is possible to oxidize propane into the acrylic acid, but not ethane into the acetic acid. In the case of Pd/Cs2.5H1.5PVMo11O40, the formic acid, methanol, etc., are produced upon addition of hydrogen to the system. This reaction in the hydrogen/oxygen system is supposed to take place via activated oxygen seeds as in the case of oxidation by hydrogen peroxide. 10 refs.

  8. Study of white noise; Hakushoku zatsuon ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Kano, R.; Tada, R. [Teikoku Oil Co. Ltd., Tokyo (Japan)

    1996-05-01

    A study was made on conditions available for white noise belonging to a finite power function with the use of a power spectrum conception. It was defined that a real variable function with a finite waveform energy was a finite energy function while that with a finite waveform power was a finite power function. A noncorrelative white noise was defined as a real variable function in which an autocorrelation function took a specific value at a certain point; however, the autocorrelation function was different between the finite energy function and the finite power function. In other words, the definition of white noise was such that `an energy spectrum was a fixed value` in the finite energy function, and that `a power spectrum was a fixed value` in the finite power function. It was pointed out, by Matsuyama (1994) with the use of the energy spectrum conception, that the white noise belonging to the finite energy function took only the form of `an arbitrary impulse function that all turned to zero except a certain point`. The same conclusion was obtained with respect to the white noise belonging to the finite power function. 1 ref., 1 tab.

  9. Effect of massive transformation on formation of acicular structure in austenitic stainless steel weld metal solidified as ferritic single phase. Report 5. Study on solidification and subsequent transformation of Cr-Ni stainless steel weld metals; Feraito tanso de gyokosuru osutenaito kei sutenresu ko yosetsu kinzoku ni okeru ashikyura jo soshiki no keisei ni oyobosu masshibu hentai no eikyo.5. Cr-Ni kei sutenresu ko yosetsu kinzoku no gyoko/hentai ni kansuru kenkyu

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    Inoue, H.; Koseki, T.; Okita, S.; Fuji, M. [Nippon Steel Corp., Tokyo (Japan)

    1997-05-05

    The authors clarified that massive transformation occurs at two phase region under To temperature and there is K-S relation between the massive formation phase and base phase using {gamma} stainless steel that solidifies at F mode and forms acicular structure at room temperature structure. There is a possibility of massive transformation in weld metals because the cooling rate below the high temperature To was high even for normal welding process. Thereupon, in this report, whether the massive transformation effects the formation of acicular structure or not was studied as for {gamma} stainless steel weld metal that solidifies at F mode and room temperature structure becomes acicular form of two {delta} and {gamma} phase. As a result, it was clarified that massive transformation occurs at two phase region with temperature below To, and the room temperature structure was acicular form structure irrespective to massive transformation in case of composition with small Cr/Ni ratio even in case of stainless steel that solidifies at F mode. 20 refs., 15 figs., 1 tab.

  10. Solidification and transformation behavior of Cr-Ni stainless steel weld metals with ferritic single phase solidification mode. Report 4. Study on solidification and subsequent transformation of Cr-Ni stainless steel weld metals; Feraito tanso de gyokosuru Cr-Ni kei sutenresu ko yosetsu kinzoku no gyoko/hendo kyodo. 4. Cr-Ni kei sutenresu ko yosetsu kinzoku no gyoko/hentai ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Inoue, H.; Koseki, T.; Okita, S.; Fuji, M. [Nippon Steel Corp., Tokyo (Japan)

    1997-05-05

    The solidification modes of {gamma} stainless steel that solidifies at initial crystal {delta} are classified into FA mode where solidification at two phase of {delta}+{gamma} takes place after crystallization at {gamma} phase during solidification and F mode where solidification is completed at {delta} single phase, and solidification transformation behaviors of weld metal of FA mode are reported in the previous paper. Hereupon, in this report, solidification and transformation behaviors of stainless steel weld metal of F mode are studied. Cr-Ni stainless steel of F mode consists of two phase stainless steel with two phase base metal structure of {delta}+{gamma} besides {gamma} stainless steel. Further, two phase stainless steel with higher alloy compared to conventional one has been developed. In this report, not only the {gamma} stainless steel but also two phase stainless weld metals with varied amount of alloying metal are studied. The welding method and welding conditions are same as that of previous paper. Observation of structure was carried out by optical microscope, and crystal orientation and element distribution were measured by EBSP and CMA respectively. 11 refs., 18 figs., 1 tab.

  11. Feature articles, thermal power and atomic power. Evaluation technique of antiseismic stability of caisson foundation bulkhead. Karyoku, genshiryoku. Keson shiki gogan no taishin anteisei hyoka gijutsu ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Shimada, M.; Fujitani, M. (Tokyo Electric Power Co., Inc. (Japan))

    1994-05-31

    One of the site construction for nuclear power plant is an offshore artificial island system. In this case, the breakwater bulkhead constructed around the island plays an important role in keeping the safety of the whole site. Accordingly the establishment of evaluation technique of antiseismic stability is also important. This study reproduced the seismic behavior of the breakwater bulkhead by means of model vibration experiment. Various factors affecting the sliding of caisson were considered by taking into account the conventional design method and concept. The experimental results were numerically simulated. For analytically obtaining the settlement of the backward ground due to the sliding of caisson, the applicability of (1) elasto-plastic finite element method using the joint element, and (2) individual element method was investigated. Each of them proved to be effective for quantitatively evaluating the deformation behavior of caisson foundation bulkhead in case of earthquake. 5 refs., 19 figs., 5 tabs.

  12. Diffusion bondability and joint properties of [gamma]-TiAl. Part 1. ; Diffusion bonding of intermetallic compound TiAl. Kinzokukan kagobutsu [gamma]-TiAl no kakusan setsugosei to tsugite kyodo. 1. ; TiAl no kakusan setsugo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nakao, Y.; Shinozaki, K. (Osaka Univ., Osaka (Japan). Faculty of Engineering); Hamada, M. (Osaka Univ., Osaka (Japan). Graduate School)

    1993-11-05

    Since Ni3Al, which has been characterized as brittle, has been clarified that it would have an extremely excellent ductility by adding B, the intermetallic compound has been being paid attention as the high temperature structural and heat resisting material, which might be closer to the practical application compared with the ceramics. On the other hand, it is thought to be indispensable, that the welding and jointing technology should be established for the practical application of the structural material. Accordingly in this study, for the purpose of establishing the bonding technology of TiAl, by using the Ti-38% mass% Al casting, and then by bonding TiAl each other through using the solid phase diffusion bonding, the selection of the proper bonding condition, bonding phenomena and mechanical properties have been investigated. Under the bonding condition, in which the void coefficient and oxide occupancy ratio have come to be below 1%, for the bonding joints selected the bonding temperature of 1473K, bonding time of 3.84ks, bonding pressure of 15MPa and bonding atmosphere of 26mPa, the tensile tests at 1073 and 1273K of the room temperature have been executed. As a consequence, the joint tensile strength has been dropped by 45 and 40MPa respectively compared with those of the base metal, and moreover all of the joints have been fractured at the bonding interfaces. 27 refs., 16 figs., 1 tab.

  13. Relationship between stacking process and resolution; Jugo shori to bunkaino ni kansuru kiso kenkyu

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

    1996-10-01

    This paper evaluates influences of stacking of incident angles against the reflecting surface on the resolution. Basic equations for evaluating the influences were deduced. A simple evaluation method has been provided using these equations. The present evaluation method is considered to be useful for acquisition design, processing, and interpretation of data as an indicator. According to the equations introduced in this study, there are some demerits for stacking traces whose incident angles were large. A total reflection region often appears due to the decreased resolution, and the vertical resolution decreases prior to stacking. Occasionally, it is not effective to remove traces having large incident angles from the viewpoint of resolution. In practice, the selection of most suitable trace through trial and error is not easy due to difference in individual regions. An evaluation method must be discussed, by which the optimal trace can be selected automatically during the data processing. 6 refs., 15 figs.

  14. Systematic analysis on mooring systems of floating structures; Futai keiryuho ni kansuru keitoteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-12-31

    Discussed herein are mooring performance requirements of the new types of marine structures now proposed, and characteristic ranges and future expansion potential of the existing mooring systems. The mooring systems studied for floating structures are catenary, single point (multi-leg and single-leg types), fixed structure with fender and tension leg mooring systems. The studied items include extraction of the elements that constitute rigidity of the spring for horizontal mooring, survey on and data collection for each element, determination of element ranges, programs for mooring analysis, assessment of mooring characteristic ranges, and potential development of the characteristic ranges. It is concluded that the existing systems with their current characteristic ranges and future possibility are insufficient for the future marine structures. It is therefore necessary to develop new mooring concepts, instead of expanding the current concepts, in order to meet the mooring performance requirements for the new marine structures. 14 refs., 9 figs., 11 tabs.

  15. Investigation on global warming gas methane; Ondanka gas methane ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    This paper summarizes the current status of research and development on generation of methane gas whose contribution to global warming is said to reach 18% as an atmospheric greenhouse effect gas. Systematization was made in the paper on the status of investigations and researches on different sources of methane gas. Measurement data are insufficient for swamplands, and amounts of methane generated in major swamplands in the world are being measured. Very few researches have been made on termites. Oceans were indicated that closed water areas are the sources of methane generation. Inland waters are in the stage of elucidating the methane generating mechanism. Methane hydrates are estimated being discharged from thawing of frozen soil. No measuring methods have yet been established for volcanic mountains. Discharge coefficient was sought for methane generation energies, and discharge amount in the global level was estimated from statistical data such as amount of production. With regard to agriculture, studies on mechanisms and measure technologies have been advanced on rumination of livestock. Data for paddy fields are being accumulated. Wastes have measurement data accumulated, and discussions are being made on discharge amount estimation and measure technologies. 30 refs., 32 figs., 28 tabs.

  16. Catalytic activity of pyrite for coal liquefaction reaction; Tennen pyrite no shokubai seino ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Hirano, K.; Kozu, M.; Okada, T.; Kobayashi, M. [Nippon Coal Oil Co. Ltd., Tokyo (Japan)

    1996-10-28

    Since natural pyrite is easy to obtain and cheap as coal liquefaction catalyst, it is to be used for the 150 t/d scale NEDOL process bituminous coal liquefaction pilot plant. NEDO and NCOL have investigated the improvement of catalytic activity of pulverized natural pyrite for enhancing performance and economy of the NEDOL process. In this study, coal liquefaction tests were conducted using natural pyrite catalyst pulverized by dry-type bowl mill under nitrogen atmosphere. Mechanism of catalytic reaction of the natural pyrite was discussed from relations between properties of the catalyst and liquefaction product. The natural pyrite provided an activity to transfer gaseous hydrogen into the liquefaction product. It was considered that pulverized pyrite promotes the hydrogenation reaction of asphaltene because pulverization increases its contact rate with reactant and the amount of active points on its surface. It was inferred that catalytic activity of pyrite is affected greatly by the chemical state of Fe and S on its surface. 3 refs., 4 figs., 1 tab.

  17. Characteristics estimation of coal liquefaction residue; Sekitan ekika zansa seijo no suisan ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Itonaga, M.; Imada, K. [Nippon Steel Corp., Tokyo (Japan); Okada, Y.; Inokuchi, K. [Mitsui SRC Development Co. Ltd., Tokyo (Japan)

    1996-10-28

    The paper studied a possibility of estimating characteristics of coal liquefaction residue from liquefaction conditions in the case of fixing coal kind in the NEDOL process coal liquefaction PSU. Wyoming coal was used for the study, and the already proposed simplified liquefaction reaction models were used. Among material balances explained by the models, those of asphaltene, preasphaltene, THF insoluble matters are concerned with residue composition. Ash content is separately calculated from ash balance. Reaction velocity constants of simplified liquefaction reaction models which influence the residue composition were obtained by the multiple regression method from experimental results in the past. The estimation expression of residue viscosity was introduced from residue ash/composition. When the residue composition is estimated by the model from liquefaction conditions, and the residue viscosity is obtained using it, the higher the liquefaction temperature is, the higher the residue viscosity is. The result obtained well agreed the measuring result. The simplified liquefaction model of a certain coal kind has been established, and characteristics of residue can be estimated even at liquefaction conditions which have never been experienced before if there is a certain amount of the accumulated data on residue composition/characteristics. 4 refs., 4 figs., 4 tabs.

  18. Studies of coal slurries property; Slurry no seijo ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Kawabata, M.; Aihara, Y.; Imada, K. [Nippon Steel Corp., Tokyo (Japan); Nogami, Y.; Inokuchi, K. [Mitsui SRC Development Co. Ltd., Tokyo (Japan); Sakaki, T.; Shibata, M.; Hirosue, H. [Kyushu National Industrial Research Institute, Saga (Japan)

    1996-10-28

    It was previously found that the increase of slurry temperature provides a significant effect of slurry viscosity reduction for the coal slurry with high concentration of 50 wt%. To investigate the detailed influence of slurry temperature for the coal slurry with concentration of 50 wt%, influence of temperature on the successive change of apparent viscosity was observed at the constant shear rate. When the concentration of coal was increased from 45 wt% to 50 wt%, viscosity of the slurry was rapidly increased. When heated above 70{degree}C, the apparent viscosity decreased during heating to the given temperature, but it increased successively after reaching to the given temperature. The apparent viscosity showed higher value than that of the initial viscosity. The coal slurry with concentration of 50 wt% showed the fluidity of Newtonian fluid at the lower shear rate region, but showed the fluidity of pseudo-plastic fluid at the higher shear rate region. The slurry having high apparent viscosity by the successive change showed higher apparent viscosity with increasing the higher even by changing the shear rate. 1 ref., 4 figs.

  19. Investigation research on autonomous responsive materials; Jiritsu oto zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    A survey was made on autonomous responsive materials as a new material which reversibly change molecular structures and the aggregation state according to external stimuli. Autonomous responsive materials imitate environmental responsibility in the living organism system and have sensing, control and active functions for external stimuli. The materials are highly efficient and environmentally friendly. In biomimetic materials for soft actuators, drastic changes by temperature of elastic modulus of water-swollen hydrogel are used to the motion. In order to molecularly design stimulus-responsible polymer gel, studied are the relation between the micro structure and stimulus responsibility, dynamic correlation between the micro structure and the macro structure, etc. In the biomedical field, new cure and diagnosis using innovative materials are expected, and the application of autonomous responsive materials to the field is studied. For example, using hydrogel responding the temperature and the surface and controlling by temperature the interaction with components of the organism such as protein and cells, drug delivery in the organism is optimized. Also studied is the application of hydrophilic/hydrophobic changes by temperature to the chromatography. 215 refs., 47 figs., 11 tabs.

  20. Proceedings of RITE international workshop on valuation; Total eko balance ni kansuru kokusai workshop hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-02-01

    The RITE International Workshop on Valuation was held in Tokyo and Osaka in February 1996, and eight papers on total ecobalance were reported. In The Field of Impact Assessment, described were constitution and methodology about impact assessment in a wide sense. In LCA Yesterday, Today and Tomorrow, discussed were the historical development and future outlook of LCA. In Standardization of Product Life Cycle Assessment, a survey of the present situation of LCA international standardization was made. In the Relationship between Product Life Cycle Assessment Methodology, considered was the relationship between the goal definition of the product life cycle assessment and the methodological choices. In Valuation in LCA, the present study of LCA was reviewed. Besides, reviews of the LCA study in Japan were made public.

  1. Carbon dioxide fixation in green plants; Shokubutsu no tansan gas kotei ni kansuru kiso kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Onishi, S. [Kansai Electric Power Co. Inc., Osaka (Japan); Kiyota, M. [University of Osaka Prefecture, Osaka (Japan); Nishimura, M. [Kansai Tech Co., Osaka (Japan)

    1997-09-30

    Concerning the effects of carbon dioxide whose level of concentration is on the rise, the short-term effect that works on the amount of exchanged gas and the long-term effect that works on the growth of green plants are studied by use of several kinds of green plants. Changes in the carbon dioxide absorption rate (photosynthetic rate) in saplings in the wake of a rise in carbon dioxide concentration are studied, and it is found that a rise in carbon dioxide concentration results in an increase in the photosynthetic rate and that the rate rises with an increase in the intensity of light. The effect of temperature is stronger when concentration is higher, with the temperature suitable for photosynthesis moving toward the high-temperature side. Growth is investigated of seedlings of Acacia mangium two years after transplantation, and then it is found that seedlings in the 1000ppm carbon dioxide section are greater by 20% in height and by 30% in trunk diameter than those in the 350ppm carbon dioxide section. In addition, the total dry matter weight is heavier by 82%. As for dry matter accumulation, there are noticeable amounts in the branches, trunks, and roots, while there is but a 15% increase in the leaf area. Leaves fall early in the high carbon dioxide environment, and this is supposedly the cause for a slowdown in the rate of the increase of photosynthesis. 6 refs., 7 figs., 2 tabs.

  2. Test and evaluation on safety relating to biotechnology; Biotechnology ni kansuru anzensei no shiken to hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Okada, M. [Bio-Oriented Technology Research Advancement Inst., Saitama (Japan)

    1996-09-05

    This paper describes the current status and how works are being carried out on safety tests and evaluation of gene recombinants in plants and microorganisms. In the field of plants, Flavr Savr tomato which has been improved in fully ripe fruit distribution and keeping quality was commercialized as the world`s first recombinant food in May 1994 by Calgene, Inc. of America. Other vegetables, such as soybean, corn, potato, and pumpkin have been completed of all items of safety evaluation, and are approaching the commercialization phase. The safety evaluation system for living organisms created by using recombinant DNA technologies has been established internationally with regard to its general framework and contents based on accumulated knowledeges and experiences as a result of utilization of over twenty years. Industrial utilization guidelines for recombinants in Japan have been established in correspondence with the OECD recommendation in 1986. Experiments to verify recombinants to be safe in environment, and cultivation of the recombinants for utilization are performed based on the experimental guidelines and utilization guidelines. 15 refs., 1 fig., 5 tabs.

  3. Survey on the FRP waste recycling system; FRP haikibutsu recycle system ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Using the area around the Ariake Sea in Kyushu as a model case, the FRP (fiber reinforced plastics) waste recycling system which can be established in Japan has been investigated in cooperation with local government bodies and fishery organizations. As a result, some proposals are provided. The recovery of waste boats utilizing existing sales outlets for fishing boats will facilitate efficient transport, efficient removal of vessel fixtures, and information management and user guidance via existing sales routes. This should make it possible to systematically secure and dispose a certain volume of scrapped FRP boats, and thus generate savings in the disposal costs. In the Phase 1, the main focus will be on establishing the recovery system for scrapped FRP boats to promote reuse and prevent improper disposal. In the Phase 2, the economics will be improved by expanding the recovery system to include other FRP waste products. In the Phase 3, the number of recyclable items will be increased, and thus the recycling system will be completed. 3 refs., 11 figs., 7 tabs.

  4. Basic study on intelligent materialization of glass; Glass no intelligent ko zairyoka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-31

    This is the report No. 98 issued by the Inorganic Material Research Institute. An intelligent material is a substance and/or material which responds intelligently to environmental conditions and exhibits functions. One of the features of amorphous materials including amorphous glass is a large freedom in chemical composition. These materials maintain order in short distance, but have as a whole the turbulent and specific atom orientation. Therefore, high tolerability in selecting the composition, and diverse synthesizing methods are available. A wide range of utilization may be conceived, such as introduction of the state of electrons having different valences in a structure, and the diverse chemical combinations. Patterns of existence of polyhedrons having different orientations, and how they are connected correlate closely with an external environment. Intelligent materials have high freedom against change in the external environment and are suitable to exhibit intelligent functions. Setting heat and light as the external conditions, attempts have been made on search and creation of intelligent materials based on state change induced by interactions between the two factors. Fundamental studies have been made on synthesis of different environment responding glasses and films, and on factors and phenomena for exhibition of the intelligence. 62 refs., 91 figs., 8 tabs.

  5. Investigation into the emission of greenhouse effect gases; Onshitsu koka gas no haishutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper grasped the situation of greenhouse effect gas emissions of advanced countries based on the reports from them. The advanced countries which concluded the U.N. Framework Convention on Climate Change (OECD member countries, the former U.S.S.R., and East European countries) are to be reported to the office concerned with work for the framework the situation of their greenhouse effect gas emissions according to the obligation of the framework. In and after April 1997, they made the second report. The paper summarized changes in emission amount, the future trend, and the policies/measures mainly taken of nine countries which have already presented the second report (the U.S., the U.K., Germany, Holland, Italy, Norway, Sweden, Finland, and New Zealand) and one country (Russia) which has made only the first report. Moreover, the literature was collected and summed up concerning the mechanism and coefficients of the emission of nitrous oxide and methane. The collected literature was classified into all fields/plural number of fields, energy relation, industrial process relation, relation with the use of organic solvent and other products, agricultural relation, relation with changes in land use and forests, and waste relation. 4 figs., 228 tabs.

  6. Studies on ternary silver sulfides; Fukugo gin ryukabutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-31

    Some sulfides containing silver show high ion mobility based on movability of silver, whose application is expected. Studies have been carried out centrally on synthesis of new compounds of ternary silver sulfides by elucidating the relationship among their compositions, structures and properties by means of crystal chemical studies mainly on their phase relationship. A few new compounds have been synthesized, such as the ones having the argyrodite family compound structure including transition metals. The synthesizing process takes a kind of turbulent liquid state structure at elevated temperatures because of movability of silver, but silver is fixed at low temperatures in different sites between skeleton structures made by other atoms. These studies on phase transfer, structures, and silver movability have been based on X-ray diffraction, infrared and Raman spectroscopic measurements, NMR, measurements of electric and thermal characteristics. For the studies related to compositions and structures of ternary metal sulfides which take compound crystalline structure, a structure analyzing method based on multi-dimensional hyperspatial groups was used. This paper reports the summary of the studies in seven chapters, and dwells on the remaining problems and future prospects. 158 refs., 114 figs., 65 tabs.

  7. Study on reduction method of brake squeal; Brake naki teigen shuho ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Nakajima, T.; Okada, Y. [Aisin Seiki Co. Ltd., Aichi (Japan)

    1997-10-01

    The reduction of brake squeal is an important technological subject in terms of making vehicles quieter. In our research, we carried out a modal analysis from the caliper to the installation bracket during generating brake squeal to identify the places that influence the squeal. Based on this, we studied proposals to reduce the squeal, and have reduced the squeal noise at about 5 kHz as reported in this paper. 1 ref., 12 figs.

  8. Measuring techniques for martensitic transformations; Marutensaito hentai ni kansuru sokutei gijutsu

    Energy Technology Data Exchange (ETDEWEB)

    Murakami, Y.; Morito, S. [Univ. of Tsukuba, Tsukuba (Japan). Graduate School; Otsuka, K. [Univ. of Tsukuba, Ibaraki (Japan). Inst. of Materials Science

    1996-03-20

    It is better to measure physical amount that shows significant change during transformation in order to carry out precise detection of martensitic transformations or to decide the transformation temperature. One of it is Differential scanning calorimetry (DSC) method. This method is very easy along with the determination of transformation enthalpy and also specific heat and is used widely. In martensitic transformation, there exist the intrinsic crystal habit face to the alloy system and crystal azimuthal relation between parent phase and martensite, and it is important to decide them correctly as crystallographic parameters. Overhere, method for measuring crystallographic parameters from martensite caused in parent phase single crystal material is introduced. Further, role of electron microscope is extremely large regarding the revelation of martensitic transformation mechanism in atomic scale. In this report, as for what is revealed regarding martensitic transformation when using electron microscope, crystal structure of martensite, form, structure of the interface and so forth are cited. 39 refs., 5 figs.

  9. High efficiency photovoltaic system with LSC. LSC wo mochiita taiyo denchi no kokoritsuka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Honda, T.; Takazawa, M.; Fujii, T.; Horigome, T. (Tokyo University of Agriculture and Technology, Tokyo (Japan)); Hane, T. (Institute of Technology Shimizu Corporation, Tokyo (Japan)); Maejima, M. (National Science Museum, Tokyo (Japan))

    1990-12-06

    This paper presents a study of the application of Luminescent Solar Concentrator (LSC) conducted in order to increase the conversion efficiency of the photovoltaic system. LSC is a solar concentrator whose structure is very simple, which is a transparent material doped with fluorescent paint. It is already confirmed that the 4 terminal devices which is a conbined LSC and Cds/CdTe solar cells are effective regardless the weather conditions. The output power of CdS/CdTe solar cells with LSC which have some superficial contents were measured experimentally using natural solar radiation as a light source. In the case that LSC {prime} s superficial contents make a slow enlargement, the total conversion efficiency of the cells with LSC decreased. However, if the geometrical condenser percentage of LSC is increased to a level above that of the fixed superficial contents, the total conversion efficiency of the cells with LSC tend to increase. However, because the conversion efficiency decreases accompanied with the size increase of the LSC, it is necessary to improve the ratio of solar concentration by controlling the light distance. 3 refs., 9 figs., 1 tab.

  10. Survey on commercial use of fuel cells; Nenryo denchi ni kansuru jitsuyoka no tame no chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The basic survey was carried out for the future approach to R & D of fuel cells. Phosphoric acid fuel cell (PAFC) is in the stage of demonstration research and field test supported by subsidy after the end of Sunshine project. Its reliability and durability problems are being solved, and its cost reduction is only one problem for practical use. Distributed systems or on-site systems will be used utilizing its excellent environmental characteristics. Molten carbonate fuel cell (MCFC), solid oxide one (SOFC) and polymer electrolyte one (PEFC) under development were thus surveyed. The following are surveyed: (1) Contribution to a human society such as improvement of energy demand/supply structure and environmental protection, (2) Technological items such as outlook for R & D, validity of developmental issues, comparison between various R & D and significance in industrial promotion, (3) Economic items such as profitability and feasible period, and (4) Social items such as sociability, compatibility to needs, possibility of locations, international meaning, market scale and promotion scenario. 90 refs., 67 figs., 96 tabs.

  11. Survey and research on precision polymerization polymeric materials; Seimitsu jugo kobunshi zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Survey and research on the precision control of primary structure of polymeric materials and the precision evaluation technology have been conducted to develop advanced polymeric materials. It is proposed that the three basic processes of polymer synthesis, i.e., addition, condensation, and biomimesis, in forming the precision polymerization skeleton are to be covered through a centralized joint research effort with participation of industry, academia, and the government institute and under the leadership of researchers from academic institutions as the team leaders. For the study of technology trends, international conferences held in UK, Germany, and Hawaii are introduced, and domestic meetings, i.e., Annual Polymer Congress and Polymer Conference, are summarized. In addition, Precision Polymerization Forum and International Workshop on Precision Polymerization were held. The basic studies include a quantum-chemical elucidation of the elementary process in polymerization reaction, time-resolved analysis of polymerization process and polymer properties, synthesis of polymers with controlled microstructures by coordination polymerization using metal complexes, synthesis of polymer with controlled microstructures by precision polycondensation, molecular recognition in catalyst-reaction site, and synthesis of imprinting polymers. 246 refs., 117 figs., 14 tabs.

  12. Microbially influenced corrosion of stainless steels; Stainless ko no biseibutsu fushoku ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kimura, Y.; Misawa, M. [Kansai Electric Power Co. Inc., Osaka (Japan)

    1998-11-30

    It is generally known, though not fully clarified, that stainless steel pipes, particularly those exposed to natural sea water; are susceptible to microbially influenced corrosion (MIC) at welded joints. In an effort to gain a better understanding of the mechanism, factors affecting the MIC behavior in welded stainless steel pipe joints were experimentally investigated. Results of the study indicate there are two major contributing factors to MIC development in the weld region. One is the circumferentially protruding shape effect of the deposited metal, provinding an environment that allows aquatic microorganisms to adhere to the downstream side of the welded bead surface. The other factor is the declining corrosion resistance in the welded joint due to the oxide film formation caused by insufficient shielding during welding. There factors, if combined, produce higher susceptibility to MIC in the weld than in the base metal. (author)

  13. Wing structure of dragonfly; Tonbo no hane kozo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Sudo, S.; Tsuyuki, K. [Iwaki Meisei University, Fukushima (Japan); Hashimoto, H.; Katagiri, K. [Tohoku Univ., Sendai (Japan). Inst. of Fluid Science

    1996-07-21

    This paper is concerned with the wing structure and the aerodynamics of a flying dragonfly. The structural properties of dragonfly wings were studied through the measurements of some morphological parameters. The wings of the dragonfly Sympetrum infuscatum were examined with a scanning electron microscope. Some structural features of dragonfly wings were revealed. Some aerodynamic aspects of dragonflies were considered on the leases of experimental results. The relationship between flapping frequency and total weight for dragonflies was found through dimensional analysis. 13 refs., 11 figs.

  14. Research study on harmonized molecular materials (HMM); Bunshi kyocho zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    As functional material to satisfy various needs for environmental harmonization and efficient conversion for information-oriented and aging societies, HMM were surveyed. Living bodies effectively carry out transmission/processing of information, and transport/conversion of substances, and these functions are based on harmonization between organic molecules, and between those and metal or inorganic ones. HMM is a key substance to artificially realize these bio-related functions. Its R & D aims at (1) Making a breakthrough in production process based on innovation of material separation/conversion technology, (2) Contribution to an information-oriented society by high-efficiency devices, and (3) Growth of a functional bio-material industry. HMM is classified into three categories: (1) Assembly materials such as organic ultra-thin films (LB film, self-organizing film), and organic/inorganic hybrid materials for optoelectronics, sensors and devices, (2) Mesophase materials such as functional separation membrane and photo-conductive material, and (3) Microporous materials such as synthetic catalyst using guest/host materials. 571 refs., 88 figs., 21 tabs.

  15. Investigation on food sanitation controlling technologies; Shokuhin eisei kanri gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    Doi, Y. [Hokkaido Electric Power Co. Inc., Sapporo (Japan); Nishioka, J.

    2000-03-24

    Investigation has been made on the current status of food sanitation controlling technologies. Eighty percent of food poisoning is caused by bacte such as Salmonera, enteritis vibrio, staphylococcus, and pathogenic colibacillus. Putrefaction as the cause for food poisoning occurs from proliferation of different microorganisms. Heating sterilization is the main method being performed, but non-heating method may include sterilization by flash and high voltage pulse discharge in addition to ultra-high pressure and ultraviolet ray sterilization. As a result of the questionnaire survey, what is extracted as the problems in the food sanitation controlling technologies is to establish a rinsing and sterilizing method with large sterilization effect, an effective sterilizing method and thawing of processed marine products, and a cooling method in food processing. Increasingly demanded for the future is to develop a foodstuff sanitation control system using as the core the hazard analysis critical control point (HACCP, a quality control program developed by the U.S. NASA to ensure safety in manufacturing space food), and micro-organism control and sterilizing technologies to support the above system. The flash pulse and high-voltage pulse sterilizing technologies as the non-heating sterilizing technology are more effective than the conventional heating sterilization methods also from the aspect of quality retention after sterilization. More active development thereof is desired. (NEDO)

  16. Study of freshwater red tide control measures; Tansui akashio taisaku ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Onishi, M.; Hatamochi, K. [Kansai Electric Power Co. Inc., Osaka (Japan)

    1997-09-30

    Basic research of biological measures for which the accumulation of basic findings is mandatory and the applied research of chemical and physical measures that are higher in feasibility are conducted for the establishment of measures to counter freshwater red tides. In the basic research, natural enemies, algaecidal microbes, conjugation inhibiting substances, and allelopathy are studied, but none of them is found feasible at the current stage. In the basic research, however, factors are discovered that inhibit the multiplication of Peridinium bipes or perish the same. In the applied research, chemical algaecidal methods, UV-aided algaecidal methods, and various red-tide constituent collection methods are studied. Collection methods are compared, and it is concluded that a method of Toray Industries, Inc., efficiently collects red-tide constituents. In this method, red-tide constituents are screened by and condensed on a cloth filter provided on the internal wall of a drum, and are dehydrated and then transferred. The applied research further involves the prediction of red tide outbreak and the raising of fish on a food containing substances extracted from red tides, and it is suggested that these are feasible. 18 refs., 15 figs., 3 tabs.

  17. Technological trend of millimetric wave communication and sensing; Miri ha tsushin sensing ni kansuru gijutsu doko

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-06-15

    This paper outlines the technological trends of (1) millimetric (mm) wave passive device, (2) mm wave semiconductor device, (3) mm wave system application, (4) optical fiber mm wave transmission, (5) mm wave satellite communication, (6) radio astronomical and global sensing systems, and (7) NRD circuit mm wave sensing. (1) Advanced inductive and magnetic filters are under investigation. (2) Higher-harmonic, low-noise and large-power devices of Gunn, FET, HBT and HEMT are under investigation by using III-VI group semiconducting materials. (3) A mm wave LAN system is in promotion with a progress of mm wave MMIC. (4) This technology remarkably advanced by development of an external optical modulator and a waveguide type optical detector. (5) 30/20GHz fixed communication, 47/44GHz mobile satellite communication, and 43/38GHz communication between satellites are under study. (6) An SIS mixer receiver was put on practical use because of its low noise. (7) A prototype 60GHz band FM-CW radar fabricated by using an NRD guide is nearly practical as collision preventive radar for automobiles. 111 refs., 71 figs., 21 tabs.

  18. Research on harmonized molecular materials; Bunshi kyocho zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Harmonized molecular materials (HMM) were researched to create functional materials adaptable to needs such as environmental harmony and high-efficient conversion in post-industrial society and aging society. Superior mechanisms function efficiently in organisms for perception, transmission and processing of information, and transport and conversion of substances. These functions are caused by harmonization between organic molecules, or organic molecule and metal or inorganic substance. HMM is a key substance to realize these functions similar to those of organisms artificially. It is the purpose of this research to develop HMMs, reform production process by innovating separation and conversion technologies, and finally realize molecular chemical plants. This research also develops high-efficient devices to contribute to the information society, and progresses the industry of bio-functional materials such as high-sensitive bio-sensor. The functions, applications and creation technologies of three kinds of HMM such as assembly, mesophase and microporous materials were researched in fiscal 1995. 956 refs., 128 figs., 13 tabs.

  19. Analysis of divided-wall column for extractive distillation; Suichoku bunkatsugata chushutsu joryuto ni kansuru kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Midori, S.; Zheng, S.N.; Yamada, I. [Kyowa Yuka Co., Ltd., Mie (Japan). Yokkaichi Factory

    2000-09-10

    The divided-wall column (hereinafter called DWC) has received widespread attention in terms of its compact structure and high thermal efficiency, which offers savings in capital and energy costs, since it was originally reported by Wright and Elizabeth i 1949. Some DWCs, have already been commercialized successfully including that of the authors in 1996. However, with the existing DWC construction, they cannot be applied to the separation of azeotropic systems or close boiling component systems, and the application has been limited to ordinary ternary systems, i. e. the separation of light, middle, and heavy fractions. In this paper, a new extractive distillation column that the concept of DWC can be applied to is shown, and a comparison with the conventional two-column sequence has been presented in terms of process compactness and heat integration. The devised column here is called DWC-E, and it has the following features: (1) DWC-E is divided from the column top to the midportion between the feed plate and the bottom by a vertical wall (splitting plate), and (2) DWC-E is compact-type process with only two top condensers and one reboiler. Moreover, a simulation of acetone-methanol-water extractive distillation is carried out to examine the validity of DWC-E. The result shows that DWC-E can save a maximum of 36 % energy consumption compared to the conventional two-column sequence. (author)

  20. Research on environmental bioecosensing technology using ecological information; Seitaikei joho ni yoru kankyo bio eco sensing gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The bioecosensing technology was studied which detects and identifies feeble signals generated by biosystem communication in wide biological environment. The following were reported as current notable environmental biosensing technologies: a quick measurement method of environmental contaminants using immunological measurement method, analysis method of ecological state of microorganism using DNA probes, observation of ecosystem by bioluminescent system, measurement method of environmental changes and contaminants using higher animals and plants, and detection method of chemical contaminants using chemotaxis of microorganism. As a result, the new bioecosensing/monitoring technology in molecular level was suggested for identifying comprehensive environmental changes which could not be measured by previous physical and chemical methods, as changes in ecosystem corresponding to environmental changes. As the wide area remote sensing technology of environmental ecological information, sensing technology on the earth, aircraft and satellite was also discussed. 247 refs., 55 figs., 17 tabs.

  1. Electromagnetic stability of Nb{sub 3}Al superconductors fabricated by rapid quench and transform process (2); Kyunetsu Kyurei{center_dot}hentai ho ni yoru Nb{sub 3}Al senzai no denjiki teki anteisei (2)

    Energy Technology Data Exchange (ETDEWEB)

    Aihara, K.; Suzuki, Y.; Wadayama, Y. [Hitachi Ltd., Tokyo (Japan). Hitachi Research Lab.; Nakagawa, K.; Tagawa, K.; Moriai, H. [Hitachi Cable, Ltd., Tokyo (Japan); Takeuchi, T.; Kiyoshi, T.; Wada, H. [National Research Institute for Metals, Tokyo (Japan)

    2000-05-29

    Nb{sub 3}Al multifilamentary wire was fabricated and the occurring situation of flux jump of it was investigated. Nb/NbAl elementary wire with diameter 1.25 mm fabricated by rapid heating and quenching method was coated by copper, and after fabricated to rectangular wire, it was heat-treated at 800 degrees of centigrade for ten hours. An elementary wire consists of 84 filaments. Flux jump was observed using SQUID. In field scan toward one direction, flux jump was not observed, but flux jump was observed in reversal magnetic field. However, magnetization did not decrease to zero. It was considered that Mb{sub 3}Al filament maintained superconductive state in spite of occurring transition of Nb region to normal conductive state by flux jump. (NEDO)

  2. Relationship between robust stability and power system damping enhancement by excitation control system of adjustable-speed generator; Kahensoku hatsudenki reiji denatsu seigyo kei ni yoru denryoku keito danpingu kojo koka to robasuto anteisei no kankei

    Energy Technology Data Exchange (ETDEWEB)

    Shigeto, T.; Yokoyama, A. [Tokyo Univ. (Japan)

    1997-12-20

    Since Adjustable-Speed Generator (ASG) is excited by alternative voltage fed by a quick-response cycloconverter, the rotor speed can be changed continuously. The ASGs installed at sonic pumping-up power stations are now utilized for Automatic Frequency Control at night time and under the light load condition by changing the pumping-up power due to the rotating speed change. It is expected. on the other hand. that under the generating condition at day time ASG will be utilized for improvement of power system stability because it can change the active power and the reactive power independently of each other. This paper presents the effect of the excitation control system of ASG designed by robust pole allocation method which is one of the controller design techniques besed on H{infinity} control theory, on the power system damping enhancement. Eigenvalue analysis and digital time simulation are carried out for 10-machine longitudinal test power system including ASGs in order to evaluate the designed controller. 5 refs., 23 figs., 5 tabs.

  3. Report for fiscal 1994 on simple operation type CAD/CAM system development through international cooperation; 1994 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The aim of this project is to accelerate the advancement of supporting industry (SI) for the sake mainly of manufacturing industries in Asian countries through researches carried out jointly with the Asian countries on electronic designing and manufacture supporting systems that suit actualities in the respective participating countries. In fiscal 1994, activities are conducted which primarily involve inquiries into the current status of other parties' organizations, fermentation of mutual understanding, and, in Japan, a review of plans of some cooperative projects. On-site investigation parties are dispatched to other countries on two occasions, who talk with the other parties about the drafting of memoranda of understanding, contents of the assistance to be extended, inquiries into the actualities of the visited parties, and the explanation of what technologies Japan has to offer. A production-related futuristic integrated information system promotion committee is established and, thereunder, working groups are organized on automobiles and their parts, electrical home appliances and their parts, fiber and apparel, participated in by learned men, and studies are conducted about the current status and trend of electronic designing and manufacture supporting systems and about steps for implementing the subject project. (NEDO)

  4. Pressure drop across a tube-bundle flow rectifier. Sekiso koshi no teiko keisu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Hayashi, T.; Yoshino, F. (Tottori Universtiy, Tottori (Japan). Faculty of Engineering)

    1991-01-25

    The pressure drop coefficient of a tube-bundle flow rectifier made by piling tubes in parallel in the flow direction was obtained with experiments. A tube-bundle rectifier forms optional pressure drop distribution, has rectification effects, and is fit for the formation of the field of the homogeneous flow with large velocity gradient. Tubes may be piled in a staggered or a side-by side arrangement. As a duct, an acrylic pipe of 130 outer diameter, 119 inner diameter and 8,069 mm length was used. A tube-bundle rectifier is a cartridge of integral construction in which polypropylene straws of 6.53 inner diameter and 0.19 mm wall thickness are piled. The ratio of the flow passage sectional area against the whole sectional area is 9.3% in the staggered arrangement and 21.5% in the side-by side arrangement. While the opening ratio is small in the staggered arrangement, the pressure drop coefficient is not necessarily large in this arrangement; the coefficient depends on the tube length and the Reynolds number. In some cases, on the contrary, the pressure drop coefficient is larger in the side-by-side arrangement. It was also indicated that the approximation of the wire mesh equivalent pressure drop coefficient in the extremity, where the tube wall is as thick as the length of the tube-bundle rectifier, can be obtained with the pressure drop coefficient of plain weave wire mesh. 11 refs., 6 figs.

  5. Analisis Nilai Kesetiaan Bushidou Dihubungkan Dengan Karoushi Karoushi Ni Kansuru Bushidou No Chuujitsu No Kachi No Bunseki

    OpenAIRE

    Napitupulu, Johan Kristian

    2010-01-01

    Masyarakat feodal di Jepang lahir bersamaan dengan lahirnya sistem wilayah yang dikelola oleh kizoku, dimana feodalisme merupakan penguasaan lahan tanah yang terpecah belah sebagai faktor produksi melalui kekuatan militer. Pada zaman feodal di Jepang bushido merupakan konsep pengabdian diri bushi. Di dalam ajaran bushido terdapat nilai-nilai kejujuran, kesopanan, kesetiaan, kehormatan, kebajikan dan keteguhan hati. Pada awalnya konsep pengabdian diri bushi disebut dengan bushido yang ditan...

  6. Performance analysis on natural energy autonomous house (HARBEMAN house); Shizen energy jiritsu house (HARBEMAN house) ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Fujino, T.; Saito, T. [Tohoku University, Sendai (Japan)

    1996-10-27

    To reduce fossil fuel consumption and CO2 emission, this article introduces an actually constructed natural energy autonomous house. It has a solar collector on the south roof for hot water supply and a sky radiator on the north roof for cooling water supply. The sky radiator uses radiation cooling phenomena into the space by electromagnetic wave through the window of atmosphere. This house also has an insulated tank with a capacity of 31 m{sup 3} in its underground. In the long-term heat storage mode, the heat is collected through the solar radiation during the period from summer to spring and is stored in the underground water tank, to use it for heating and hot water supply in winter. The heat can be recovered from the garbage waste incinerator. A gas fired auxiliary boiler is used for the shortage. In the long-term heat regeneration mode, the heat is regenerated through the sky radiator during the period from spring to summer and is stored in the underground water tank, to use it for cooling in summer. For the shortage, the water is cooled using a heat pump operated by the midnight power. The insulating performance is improved by using the pair glass in windows and the glass wool in the walls. Rain water is collected in a tank with a capacity of 2 m{sup 3}, to use it for toilet water. Annual energy and water saving is equivalent to 600,000 yen. 10 refs., 10 figs., 2 tabs.

  7. Fundamental characteristics on electric system of solar electric vehicle; Solar car no denki keito ni kansuru kiso tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, S.; Sasaki, M.; Kaga, T.; Koyama, N. [Hachinohe Institute of Technology, Aomori (Japan)

    1996-10-27

    The electric system of a solar vehicle was removed and the fundamental characteristics examined in order to carry out a basic experiment on the electric system. Using a basic circuit with panels, batteries and loads connected, the voltage and current were measured in the presence/absence of the trackers, batteries, etc., and then, their effects were examined. Simultaneously, the quantity of solar radiation was also measured. The lowering of the output voltage was somewhat relaxed with the use of the trackers. Further, with the trackers used, the output voltage of the panel was small in spite of a large quantity of solar radiation compared to the case without the trackers, which was due to the restriction of the output voltage by the trackers. When measured without batteries, the output voltage of the panel was such that the load current was also influenced by the variation of insolation, so that, with a large decrease in insolation, the load current was decreased with the supply of current suspended from the panel. 7 figs., 1 tab.

  8. Report on Asian Environment Information Network; 'Asia kankyo joho network' ni kansuru hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The goal is the construction of Asian Environment Information Network (AEInet) in accordance with a contract signed between Indonesia's LIPI (Indonesian Institute of Science) and NEDO under NEDO's Research Cooperation Project Concerning the Development of Environment Measuring Laser Radar (LR). The network is so designed and constituted as to operate on a private line between Indonesia and Japan via IP (Internet protocol) and to enable the exchange on the Internet network of the data collected/analyzed by the Indonesian LR system and of articles of e-mail between scientists of the two countries. The AEInet will be utilized for the collection/analysis of LR-collected data; exchange of observed data and the result of processing; provision of support to environment information scientists in exchanging e-mail and information; and the search of databases for the implementation of the project. In this paper, the outline and functions of the system, network system design, WWW server construction, network operating status, joint researches with Indonesia, etc., are described. (NEDO)

  9. Material design related investigation. Investigation on the bionic design; Zairyo sekkei kankei chosa. Bionic design ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    The biomolecular characteristics were analyzed to establish the basic technology for the utilization of artificial joint, liver and muscle. The rise in functional grade of biomolecules themselves, and inter-biomolecular recognition and bonding rationally and teleologically generates living body`s functions to form the structure and drive the molecules. Energywise extremely advantageous, those functions serve to creatively produce the artificial internal organs and elucidate the function of biotissue, if the tissue and function of living body can be artificially restructured by utilizing the biomolecular mechanism to make the tissue self-proper. It is the concept of bionic desing research. Methodologically, the inter-bimolecular action is to be synthetically analyzed through bio/physicochemistry-based computer simulation. The artificial materials excelling in adaptability to the living body are to be developed by analyzing the mechanism for the biotissue. The molecules-driving function is also to be analyzed which is generated dy the high-grade bonding of muscular and other high biomolecules. 280 refs., 69 figs., 9 tabs.

  10. Demonstrative study for the wind and solar hybrid power system. 2; Furyoku taiyoko hybrid hatsuden system ni kansuru jissho kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kimura, Y.; Sakuma, H.; Ushiyama, I. [Ashikaga Institute of Technology, Tochigi (Japan)

    1996-10-27

    In order to verify the complementary relationship between wind and solar energy, the long-term field test of the hybrid power system was conducted at the natural energy square of Ashikaga Institute of Technology. The solar cell blade windmill composed of a Savonius windmill and flexible solar cells applied to swept buckets was also prepared. As a result, the wind power generation was promising mainly in the winter period including the late fall and early spring, while solar one was stable all the year through although it was slightly poor in winter. Stable power generation was thus achieved by combining wind energy with solar energy. As the whole data of other wind and solar power generation systems at the square were analyzed for every month, the same conclusion as the solar cell blade windmill was obtained as follows: the wind power generation in Ashikaga area is promising in Nov.-March from the field test result for 16 months, solar power generation is stable all the year through, the hybrid power system is effective in Nov.-April, and the solar cell blade windmill is equivalent to the hybrid power system. 3 refs., 5 figs.

  11. Study on thermochemical liquefaction of biomass feedstocks; Biomass genryo no yuka hanno tokusei ni kansuru kisoteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-02-10

    Liquefaction is applied to various biomass wastes and unused biomass to study characteristics of the liquefaction in each case. The paper described the system of the conversion and use of biomass into energy, conducted the positioning of the liquefaction, and outlined a history of the liquefaction chemistry and the study. To obtain basic data of characteristics of the liquefaction of various biomass raw materials, the liquefaction was conducted changing operational factors for the purpose of clarifying the product distribution of oil and by-products and oil properties. A comprehensive consideration was made of the liquefaction based on basic data and literature reports on the liquefaction of various biomass. From the above-mentioned studies, it was concluded that the energy can be recovered in a form of oil by applying the liquefaction to various biomass materials. A series of the study clarified effects of various operational factors on characteristics of the liquefaction as well as effects of classification of biomass materials and composition of the materials on characteristics of the liquefaction. 141 refs., 78 figs., 56 tabs.

  12. Fiscal 1995 investigation on biological fixation of carbon dioxide; 1995 nendo seibutsuteki CO2 kotei ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    To cope with the global warming caused by CO2, an investigation was conducted into biological fixation. It is necessary to make a many-sided and comprehensive study on the mechanism of CO2 fixation, the scale (area and carbon holding density), the rate and the environmental impact of the introduction of the technology and the technical problems, and to make a quantitative evaluation of each of the methods in order to make them practical proposals. The global ecosystem is classified into the land biota and ocean biota, and each typical ecosystem was surveyed in terms of the surface area, the carbon holding amount (presently existing amount), the net primary production amount, the required nutrient salt amount, the transpiration rate, etc. Next, a discussion was made on the increasing effect of the carbon fixation amount by changing the present ecosystem from the aspect of scale and rate. At the same time, a study was carried out of energy efficiency, economical efficiency and problems. Last, elementary technology was taken up which seems to be important for implementing measures for the biological carbon fixation. As to the ocean, it is necessary to obtain information, which is not sufficient to utilize marine biota for CO2 fixation, especially on the mechanism of depth-direction transfer of organism and its quantitative grasp. As to the land, one of the measures is conversion of the ecosystem where the amount of carbon fixed is small to the ecosystem where the amount is large. 249 refs., 58 figs., 51 tabs.

  13. Numerical simulation on streaming potentials in a wellbore; Koseinai no ryudo den`i ni kansuru suchi simulation

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, N. [Kyushu University, Fukuoka (Japan)

    1996-05-01

    This paper reports numerical computation of streaming potentials which are generated by transient pressure waves propagating the vicinity of wellbore wall immediately after a mud cake formed on the wellbore wall has been removed. One existing analysis solution on heat conduction was utilized upon changing the parameters in order to derive fluid pressure inside the ground bed. Calculations were carried out by using the existing three-dimensional finite difference method (partly re-written) based on the relationship constituted between the fluid pressure and the streaming potential. This paper presents results of calculating the streaming potentials in wellbores on models having wellbores filled with mud water in a cubic ground bed existing with ground bed water at saturation of 100%. The calculations have been conducted on the following cases: a case where permeability of the ground bed is small with the fluid under two conditions of low electric resistivity and high electric resistivity, a case where the permeability is large with the fluid under the above conditions, and a case where a small area of bore wall is covered with a rubber pad having high electric resistivity under a low electric resistivity condition. 8 refs., 5 figs.

  14. On the relationship between stacking process and resolution. 2; Jugo shori to bunkaino ni kansuru kiso kenkyu. 2

    Energy Technology Data Exchange (ETDEWEB)

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

    1997-05-27

    With respect to concept of resolution in seismic exploration using the reflection method, detailed considerations were given on processes of forming the resolution as a result of arranging observation points at vibration transmitting and receiving points. In the discussion, numerical experiments were carried out, in which the scattering stacking process is applied in a model having one scatterer existing in homogeneous media. The experiments investigated an imaging formation process of the scatterer when arrangement of the vibration transmitting and receiving points were changed from a coarse condition to a dense condition while the number of transmitting and receiving points is being increased. Resolution is created if waveforms having finite frequencies are used as input, and the imaging is performed by utilizing the limited number of vibration receiving and transmitting points. If the concept of equi-travel plane is used under these conditions, the equi-travel planes perform negation with each other, and it was indicated that visual resolution is expressed by how good the negating effect is. It was discovered that such concept of the resolution is quite ambiguous in terms of engineerings. 2 refs., 17 figs.

  15. Feasibility survey of thermoelectric conversion technology using semiconductors; Handotai wo riyoshita netsuden henkan gijutsu no kanosei ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    1993-03-15

    The paper takes notice to thermoelectric conversion technology using semiconductors and investigates it in a wide range from high temperature to low temperature to study its feasibility. It is found that in Bi-Te alloy elements applicable to a temperature range of around 200{degree}C, some are over 3.5{times}10{sup -3}K{sup -1} in performance index, and performance of the element can be practically improved in the near future. The thermoelectric power generation system using waste heat from the fuel cell power plant, which is 5-6% in conversion efficiency, can generate output more than 100kW and is expected to improve by approximately 1% in plant overall efficiency. The construction cost, however, is around 1.6-1.9 million yen/kW. The thermoelectric power generation plant which is modeled on No.2 generator of Hatchobaru geothermal power plant can generate electric output of 10-12.5MW, which is smaller than that of the conventional geothermal power generation. The construction cost is around 3.2-4.1 million yen/kW. Even if advantage of the system in running cost is considered, attractive systematization seems to be difficult. 88 refs., 81 figs., 17 tabs.

  16. Investigations on international standardization of environmental management systems. 3; Kankyo kanri system no kokusai hyojunka ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Japan as an ISO member country identifies the state of discussions in the environmental management standard deliberation committee at ISO. Investigations were performed on international standardization of environmental management systems for the purpose of participating and cooperating in preparing and establishing international standards related to environmental management, and playing part in working, solving and improving environmental problems. Under the circumstances that environmental problems are drawing worldwide interest, the International Organization for Standardization (ISO) has been carrying out since 1993 deliberations on environmental management standards to institutionalize environmental management rules to check effects of business activities on the environment. The International Organization for Standardization/Environmental Management Technical Committee (ISO/TC207) was installed, at which series number of 1400 order was allotted for environmental management related standards, and major standards have come to a final stage of standard formulation at the TC207 Oslo conference in June 1995. In Japan, the Ministry of International Trade and Industry has established an environmental management standard deliberation committee composed of people of experience or academic standing to advance discussions on how the environmental management should be in business entities through deliberations on ISO standards.

  17. Experimental studies for the twisted-type savonius rotor. Twisted savonius fusha no seino ni kansuru kiso jikken

    Energy Technology Data Exchange (ETDEWEB)

    Ushiyama, Izumi; Shibata, Masayoshi; Soshino, Masahiko; Mashige, Masahiko (Ashikaga Inst. of Technology, Tochigi (Japan))

    1989-12-07

    For obtaining optimum design shape of Savonius rotor used to storage pump for agriculture and airation of lake, systematic study on the effect of each of miscellaneous factors was conducted. As the defects of present Savonius rotor, heterogeneous distribution of static torque for phase angle of rotation was indicated, and as the solution, twisted rotor was proposed for which wind tunnel test were pursued. For the experiment, rotors with and without 90 degree twist angle were compared. As the result, it was recognized that distribution of static torque was considerablly improved by twist. In addition, those were considered as the effect of twist that maximum speed of wind turbine at the same wind speed was increased caused by decreased resistance, and that homogeneous torque and flat power output were achieved by decreased effective working area of wing. 2 refs., 6 figs.

  18. International Workshop on Carbon Cycling and Coral Reef Metabolism; Sangosho no tanso junkan ni kansuru kokusai workshop hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-10-16

    The paper described the International Workshop on Carbon Cycling and Coral Reef Metabolism which was held at Miyako-jima, Okinawa Pref. on October 17-24, 1995. In the workshop, researchers got together which are involved in marine chemistry, marine biology, coral ecology, and environmental science, and discussed the carbon cycling and metabolism of coral reef. Discussions were made on what the coral reef ecosystem is, and what the definition of a sink or a source for CO2 is. Also discussed were scales of how much time and space should be considered to make these issues clear. Further, it was proposed that it was necessary to investigate carbon balance of both the whole system and the components of the system and to keep track of mass transfer among neighboring components of the system. Seventeen presentations were given. The workshop obtained a definite consensus on carbon balance of the coral reef system. 123 refs., 39 figs., 9 tabs.

  19. Research on EBEP (Electron Beam Excited Plasma) applications; EBEP (denshi beam reiki plasma) no tekiyo gijutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yanase, E.; Ryoji, M.; Mori, Y.; Tokai, M. [Kawasaki Heavy Industries, Ltd., Kobe (Japan)

    1996-04-20

    Research and development is actively conducted on machining technologies using plasma in various fields, with studies energetically pursued on etching techniques or those of forming a thin film by the use of high frequency and microwave plasma. The EBEP system jointly developed by Kawasaki Heavy Industries Ltd. and Institute of Physical and Chemical Research is a plasma source for forming a high density plasma by implanting into a plasma chamber from the outside a high-current electron beam accelerated to an energy of approximately 60 to 100eV where the collision cross-section of gas ionization is maximized. The characteristics of the system are such as (1) it enables electron energy distribution to be controlled from outside by varying acceleration voltage, (2) it excels in the controllability of ion energy and (3) it allows to form a steady high-density plasma in a nonmagnetic field. This paper presents the generating principle of EBEP, its plasma characteristics, etching technique using EBEP, thin film forming technique by EBEP-CVD method, and multipurpose apparatus for research and development. 6 refs., 7 figs., 1 tab.

  20. Study on automatic tuning of ship`s PID regulators; Hakuyo seigyo system no gain jido chosei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nakatani, T. [Toyama Mercantile Marine College, Toyama (Japan); Otsu, K.; Moriyoshi, N. [Tokyo Univ. of Mercantile Marine, Tokyo (Japan); Okazaki, T. [Nagoya Institute of Technology, Nagoya (Japan)

    1996-12-31

    Proportional, integral and derivative (PID) controls are used for a steering system and a main engine control unit installed in a vessel. Among them, this paper describes effectiveness of a PID gain tuning method using a limit cycle by means of relay control which is safer and simpler than conventional limit sensitivity methods. The present method was applied to an actual marine control system to conduct an actual vessel experiment. As a result of applying the method to a bow azimuth control system using a rudder, a new azimuth setting was set with an overshoot of 1.6 degrees in a ten-degree azimuth changing experiment. With respect to direction maintaining steering performance, the present method was capable of controlling the direction at a speed loss to about 80% of the ship`s autopilot. As a result of applying the method to a bow azimuth control system using a bow thruster, direction maintaining and changing control was realized in a low speed range in which rudder effect is lost. As a result of applying it to a main engine governor system and performing control of main engine rotation speed, it was found possible to derive control gains in a safe state without applying an excessive load to the main engine both under load and no load conditions. 14 refs., 8 figs., 11 tabs.

  1. Comparison about the bone material examination of JIS and ISO; Honezai shiken ni kansuru JIS to ISO no hikaku

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Sumie.; Yanagi, Kei.; Shimura, Akiharu.; Murohoshi, Shiori. [Japan Testing Center for Construction Materials, Tokyo (Japan)

    1998-12-01

    There are various things in slug bone material and so on manufactured from the macadam, crumble sand. Which crushed rock including gravel, sand to produce in the nature and which was manufactured, and a lightweight bone material and the industry by-product with the bone material used for the concrete. It is necessary with a bone material to grasp the nature of the bone material itself properly to occupy about 70% of the capacity in the concrete and to manufacture the good concrete of the quality from the influence that influence to the various concrete materiality that quality being big. When the quality of a bone material to use for the concrete is confirmed, an examination is being done in accordance with the way of examining it established as the Japanese industry standard in our country. (NEDO)

  2. Experimental report on the use of form materials for expanded metal; Expand metal no katawakuzai riyo ni kansuru jikken hokoku

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, S. [Kansai Electric Power Co. Inc., Osaka (Japan); Nishimura, H. [Chubu Electric Power Co. Inc., Osaka (Japan); Iida, S. [Hokuriku Electric Power Co. Inc., Toyama (Japan); Kagimoto, H. [Electric Power Development Co. Ltd., Tokyo (Japan)

    1998-07-05

    It was investigated to use the expanded metal for form materials when the inspection gallery of a dam is constructed. The same method as a form method in tunnel lining concrete has been used until now. However, a concrete block or precast panel has been used for trial to shorten the process. Therefore, it was considered to use the expanded metal, which is lower in price and lighter in weight than the concrete block and which was also effectively used as form materials, as the form materials of an inspection gallery. A simple girder load test for bending rigidity that is the basic physical properties of materials was conducted first. Next, a form model was manufactured, and the displacement, strain, and hardening properties were tested. Concreting was performed using a full structural model to acquire the basic data such as construction performance. The way to analyze the form in this method was investigated, and quantitative data could be proposed on the design drawing and table and the cost reduction effect. The expanded metal is judged to be capable of being used for other structures as well as a dam inspection gallery. 21 figs., 2 tabs.

  3. Indoor environment and allergy except housedust mite; Jukankyo to allergy ni kansuru dani igai no chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Nakao, F.; Nishima, S.

    1998-05-31

    Pathopoiesis factors of allergic diseases include immune antibody productivity sthenia reacting with antigens such as mite or the like in allergy reaction which is regarded as based on genetic fact (atopic diathesis), and environmental factors as external factors. The environmental factors are further classified into specific factors (antigens) and nonspecific factors. The former factors include the indoor factors such as mite, mould, animals bred indoor, etc., and outdoor factors such as pollen and so on. The latter factors include indoor factors such as passive smoking, carbon monoxide, nitrogen oxides, formaldehyde, etc., and outdoor factors such as sulfur oxides, nitrogen oxides, airborne particles and so on. In this paper, the environmental factors in relation to allergic diseases expect mite are introduced. Besides mould, cockroach/insect, fur dust and dandruff of animals, adjustment of room temperature/humidity, smoking, indoor and outdoor air pollution are mentioned as the environmental factors expect mite, and the cause-effect relations thereof are explained. 24 refs., 3 figs., 7 tabs.

  4. Research trend survey on the stable isotope utilization technology; Antei doitai no riyo gijutsu ni kansuru kenkyu doko chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report reviews the activities and the trends in the area of the stable isotope use attracting attention recently. In the medicine and clinical treatment sector, the remarkable trends are the extension of {sup 13}C use. The breath test and the magnetic resonance spectroscopy (MRS) diagnosis have been developed as inspection methods. It is noted that investigation has been initiated on the magnetic resonance imaging (MRI) using {sup 3}He and {sup 129}Xe for the lung imaging. In the organic chemistry and biochemistry sector, the stable isotopes are used for analyzing the structures of complicated natural compounds and materials relating to life science and for analyzing the chemical reaction mechanism of organic compounds. In the nuclear energy sector, {sup 10}B and {sup 7}Li have been used as neutron absorption materials and pH neutralizing reagent, respectively. In the analysis and measurement sector, the process of isotopic dilution is used for the environmental analysis of trace elements including harmful substances. Among various separation methods of isotopes, well studied uranium enrichment processes and deuterium separation processes are described. Separation of {sup 15}N by ion exchange resin method and plasma ion cyclotron resonance (ICR) isotope separation have been studied, recently. 133 refs., 53 figs., 7 tabs.

  5. Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kuriyagawa, M.; Saito, T.; Kobayashi, H.; Karasawa, H.; Kiyono , F.; Nagaoki, R.; Yamamoto, Y.; Komai, T.; Haneda, H.; Takahashi, Y. [National Institute for Resources and Environment, Tsukuba (Japan); Nada, H. [Science and Technology Agency, Tokyo (Japan)

    1997-02-01

    Basic studies are conducted for the collection of methane from the methane hydrate that exists at levels deeper than 500m in the sea. The relationship between the hydrate generation mechanism and water cluster structure is examined by use of mass spectronomy. It is found that, among the stable liquid phase clusters, the (H2O)21H{sup +} cluster is the most stable. Stable hydrate clusters are in presence in quantities, and participate in the formation of hydrate crystal nuclei. For the elucidation of the nucleus formation mechanism, a kinetic simulation is conducted of molecules in the cohesion system consisting of water and methane molecules. Water molecules that array near methane molecules at the normal pressure is disarrayed under a higher pressure for rearray into a hydrate structure. Hydrate formation and breakdown in the three-phase equilibrium state of H2O, CH4, and CO2 at a low temperature and high pressure are tested, which discloses that supercooling is required for formation, that it is possible to extract CH4 first for replacement by guest molecule CO2 since CO2 is stabler than CH4 at a lower pressure or higher temperature, and that formation is easier to take place when the grain diameter is larger at the formation point since larger grain diameters result in a higher formation temperature. 3 figs.

  6. Survey on bio-chemical complex harmonized with global environment. 3; Kankyo chowagata seibutsu kagaku konbinato ni kansuru chosa. 3

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    A survey was conducted of bio-chemical complex harmonized with the global environment for the purpose of constructing the material production process harmonized with the environment by the process fusion between biological conversion and chemical reaction. Palm oil was taken up as renewable raw material plant resource. The process utilizing bio-chemical reaction advances at normal temperature and pressure and is high in reaction specificity and selectivity. This is a recycling, circulation and environmental harmony type production technology which brings high yield, energy conservation, resource conservation, and low environmental loads. Waste water treatment and production of useful substances from sludge were thought as elementary technology. A possibility was studied of enzyme production by culturing solid waste, and the enzyme was applied to the hydrolysis process. The paper indicated trace components in the palm oil and the extraction method and proposed the production process of new derivatives for adding value to hydrolysate. A study was also made of the overall process flow which integrated these new processes and the material balance. The comprehensive evaluation of this new process was made from the aspect of the product structure, the market, construction cost, economical efficiency, and the environment. 133 refs., 65 figs., 56 tabs.

  7. Investigation on development of advanced materials by solvothermal technique; Sorubo thermal hanno riyo senshin zairyo kaihatsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Solvothermal reaction is reaction under high temperature and high pressure, which is expected to fabricate new functional materials. In this study, the materials are classified into two fields, i.e., inorganic materials, metals and their composites and organic materials and their composites. The current status of R and D of production and processing technology in each field is surveyed and the prospect of it is discussed. For the inorganic materials, metals and their composites, it is explained that very fine metal oxide particles, complex oxides, single crystals, whiskers, compounds with layer structure, metastable compounds, ion conductors and catalysts with high ability could be produced only by controlling the solvothermal reactions in atomic order. For the organic materials and their composites, surveyed results of the solvothermal technique using non-aqueous solutions are mainly provided. The necessity of a national project for researches on the solvothermal reactions is proposed from the viewpoint of resource, environment and energy. 777 refs., 38 figs., 26 tabs.

  8. Experimental studies on a Savonius rotor with casing; Casing wo motsu Savonius gata turbine no tokusei ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tan, S. [Tsuruoka National College of Technology, Yamagata (Japan); Shimizu, Y. [Mie University, Mie (Japan). Faculty of Engineering; Kikuyama, K. [Nagoya University, Nagoya (Japan). Faculty of Engineering

    1997-07-25

    The Savonius turbine, which works at low rotatory speeds and gives a high degree of torque, has been used for a wind turbines. In order to examine the feasibility of applying the turbine as a wave energy conversion system, a Savonius rotor was installed in a casing and its performance was studied experimentally to examine the various geometrical configurations of the rotor and casing. When optimally configured, the turbine exhibits higher efficiency than a wind turbine without a casing during steady flow conditions. 6 refs., 17 figs., 1 tab.

  9. Study on the product estimation of small wind turbines; Kogata fusha no hatsudenryo yosoku ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuzawa, K.; Kimura, Y.; Ushiyama, I. [Ashikaga Institute of Technology, Tochigi (Japan); Nagai, H. [Nihon Univ., Chiba (Japan). Coll. of Industrial Technology

    1998-09-01

    In order to clarify problems involved in application of Weibull probability distribution used for estimation of power production by a large wind turbine to a small wind turbine, and solutions thereof, the estimated results are compared with the observed ones. The conventional estimation method, when applied to a small wind turbine, tends to overestimate production of power, because of overestimated production in a high wind velocity range which occurs less frequently. Estimation of power produced by a wind turbine is based on working wind velocity range, determined from the furling mechanism for the power generation characteristics of the wind turbine concerned. In the case of a small wind turbine, on the other hand, better estimates are obtained from the working wind velocity range in which Weibull wind velocity distribution is used to determine probability of occurrence. For wind turbines working at low to medium wind velocities, such as Savonius wind turbine, the estimates are in fairly good agreement with the observed results, by which is meant that the conventional estimation method aided by Weibull distribution can be directly applicable to small wind turbines. 4 refs., 3 figs., 3 tabs.

  10. Experimental studies for the vertical-axis hybrid wind turbine; Suichiyokuziku haiburiddo hoshiki fusya ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ito, M.; Ushiyama, I. [Ashikaga Institute Of Technology, Tochigi (Japan); Inoh, M.; Hiroki, T. [NihondenkiSeiki Corp., Tokyo (Japan)

    1997-06-01

    Advantages and disadvantages of Darrieus type and Savonius type turbines as the wind energy generation system are described and the above-titled wind turbine is proposed to improve the drawback of poorer output performance in case of hybrid of these 2 types than that of independent Darrieus type. The layout of wind channel equipment and the hybrid system of conventional direct type and that of the clutch type prototype are explained with consideration on the test results. When compared 2 blades of 136mm chord length to 3 blades of 90mm chord length in terms of torque and power properties, the prototype showed a performance for the both properties 20% better than those of conventional type, particularly in the case of 3 blades, both the maximum power and the torque coefficients became about half of those of 2 blades. Further, a prototype wind turbine was designed and fabricated according to the theory of single tube of flow with regard to the straight Darrieus type and tested in association with Savonius type turbine as well as the latter alone and the results for each case were compared and examined. As for the conclusion, the usefulness of clutch connection and its effect of improvement became more remarkable along with the increase of wind speed and so forth are indicated. 7 refs., 14 figs., 2 tabs.

  11. Experimental study on power augmentation of Savonius rotor; Savonius gata fusha no shutsuryoku zokyo ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Sato, S.; Kikuchi, K.; Ushiyama, I. [Ashikaga Institute of Technology, Tochigi (Japan)

    1997-11-25

    Wind power now being used is mostly for power generation, and the power generating rotor is represented by the horizontal propeller type. The vertical type, such as Savonius rotor which uses drag force, may be used for special purposes. The Savonius rotor has been used for water pumping-up and ventilation for its characteristics of low rotational speed and high torque. The authors have proposed, based on the data collected by operating a wind mill of 10W, a method for reducing resistance by deflecting wind flowing onto the return bucket to augment drag force, in an attempt to make the system more functional. The Savonius rotor is equipped with a semi-cylindrical cover, and guide and side plates, to follow their effects. It is found that these plates work to augment power without needing expansion of sweeping area. 4 refs., 12 figs.

  12. Study about the effect of microgravity on biofunctions; Seitai kino eno bisho juryoku no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    A study is made for the elucidation of the effect of microgravity on biofunctions. The protoplast of shiitake is exposed to microgravity and then cultured, and a significant difference occurs. The rate of colony formation by cell fusion in the test sector is found to be two times higher than that in the control sector. When swimming ciliates which are unicellular are suddenly exposed to microgravity, their swimming speeds changed differently according to the direction of swimming. When a mouse subjected to acupuncture for three days is exposed to microgravity, its water metabolism and excretory function are enhanced. A mouse treated with Chinese medicine reacts in the similar way. The change due to microgravity in the amount of acetylcholine in the hypothalamus is found characteristically time dependent. Mice infected with lethal herpes viruses just after exposure to microgravity die at a rate in proportion to the number of exposures and to the amount of viruses given. The migration speed of chemical stripes in case of a gel-base BZ (Belousov-Zhabotinsky) reaction under microgravity is equal to that on the ground. The trigger wave migration speed in case of a water solution-base BZ reaction under microgravity is reduced to approximately 80% of the speed on the ground. 12 refs., 31 figs., 3 tabs.

  13. Topographical effects on wave exciting forces on huge floating structure. 2; Ogata futaishiki kaiyo kozobutsu ni sayosuru haryoku ni kansuru kenkyu. 2

    Energy Technology Data Exchange (ETDEWEB)

    Imai, Y. [Hiroshima University, Hiroshima (Japan); Okusu, M. [Kyushu Univ., Fukuoka (Japan). Research Inst. for Applied Mechanics

    1996-12-31

    A method to predict drift force acting on a floating structure has been developed for a marine structure consisting of a number of floating elements, positioned in a region having a slope at the sea bottom. When a huge marine structure, such as floating air port, is located in a coastal area, scale of the overall structure is very large, of the order of scale of water depth change. The new method assumes that a marine structure consisting of an infinite number of cylindrical floating elements is installed in parallel to the seashore, where symmetrical nature of the configuration allows to predict behavior of the whole system by analyzing one element. Integration of pressures acting on structure surfaces determines the horizontal component of the drift force acting on the structure. Being influenced by topography, drift force predicted peaks at a frequency different from that for the level predicted on the assumption of constant water depth. This indicates the necessity for consideration of seabottom slope and effects of broken waves at the seashore. 6 refs., 12 figs.

  14. Studies on surface tension effect for free surface flow around floating models; Futai mokei mawari no jiyu hyomenryu ni oyobosu hyomen choryoku no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, K. [Yokohama National Univ., Yokohama (Japan). Faculty of Engineering; Akiba, H. [Toyo Construction Co. Ltd., Tokyo (Japan)

    1996-12-31

    The effect of surface tension on free surface flow around floating models is discussed experimentally and numerically. Three-dimensional free surface flow around vertical circular cylinders floating in a circulating water channel was visually observed, where a surface-active agent was added to water. The results are analyzed using Weber number. The numerical analysis was done for vertical cylinder and CY100 models using the Rankine source method. Weber number of at least around 120 is necessary to eliminate the effect of surface tension from free surface flow around the CY100 model. The numerical analysis for the cylinder model needs simulation with wavelength shorter than that of free surface wave used by the Rankine source method. The model for the resistance test should be at least around 7m long to eliminate the effect of surface tension at Froude number of 0.1 or higher. 15 refs., 12 figs., 2 tabs.

  15. Coal liquefaction in early stage of NEDOL process 1t/d PSU; 1t/d PSU ni okeru ekika shoki hanno ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Ikeda, K.; Kawabata, M.; Mochizuki, M.; Imada, K. [Nippon Steel Corp., Tokyo (Japan); Nogami, Y.; Inokuchi, K. [Mitsui SRC Development Co. Ltd., Tokyo (Japan)

    1996-10-28

    To investigate the behavior of coal liquefaction reaction in early stage as a part of studies on the coal liquefaction characteristics using NEDOL process 1 t/d process supporting unit (PSU), coal slurry sample was taken from the outlet of slurry preheater located in the upflow of liquefaction reactors, and was tested. Tanito Harum coal was used for liquefaction. Preheater was operated under the condition of pressure of 170 kg/cm{sup 2}, gas flow rate of 64 Nm{sup 3}/hr, and at temperature up to 410{degree}C at the outlet, in response to the standard test condition. The slurry sample was discharged into a high temperature separator with temperature of 250{degree}C. Liquefaction was not proceeded at the outlet of preheater. Solid residue yielded around 80%, and liquid yielded around 15%. Gases, CO and CO2, and water yielded also small amount around 3%. The solid sample contained much IOM fraction (tetrahydrofuran-insoluble and ash), and the liquid contained much heavy oil fraction. Hydrogenation was not proceeded, and the hydrogen consumption was very low showing below one-tenth of that at the usual operation. Hydrogen sulfide gas was formed at early stage, which suggested that the change of iron sulfide catalyst occur at early stage of liquefaction. 1 ref., 5 figs., 2 tabs.

  16. Investigation of the deposit formation in pipelines connecting liquefaction reactors; 1t/d PSU ni okeru ekika hanno tokan fuchakubutsu no seisei yoin ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Okada, Y.; Nogami, Y.; Inokuchi, K. [Mitsui SRC Development Co. Ltd., Tokyo (Japan); Mochizuki, M.; Imada, K. [Nippon Steel Corp., Tokyo (Japan)

    1996-10-28

    The liquefaction reaction system of an NEDOL process coal liquefaction 1t/d PSU was opened and checked to investigate the cause of the rise of differential pressure between liquefaction reactors of the PSU. The liquefaction test at a coal concentration of 50 wt% using Tanito Harum coal was conducted, and it was found that the differential pressure between reactors was on the increase. By the two-phase flow pressure loss method, deposition thickness of deposit in pipelines was estimated at 4.4mm at the time of end operation, which agreed with a measuring value obtained from a {gamma} ray. The rise of differential pressure was caused by deposit formation in pipelines connecting reactors. The main component of the deposit is calcite (CaCO3 60-70%) and is the same as the usual one. It is also the same type as the deposit on the reactor wall. Ca in coal ash is concerned with this. To withdraw solid matters deposited in the reactor, there are installed pipelines for the withdrawal at the reactor bottom. The solid matters are regularly purged by reverse gas for prevention of clogging. As the frequency of purge increases, the deposit at the reactor bottom decreases, but the deposit attaches strongly to pipelines connecting reactors. It is presumed that this deposit is what Ca to be discharged out of the system as a form of deposition solid matter naturally in the Ca balance precipitated as calcite in the pipeline connecting the reactor. 3 refs., 5 figs., 4 tabs.

  17. Survey on weather changes associated with large-scale tree-planting. 2; Daikibo ryokuka ni tomonau kiko henka ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    An investigational study was made for large-scale tree-planting aiming at CO2 fixation. Water resource and precipitation relating to tree-planting were determined from NASA data and arranged into the global distribution map. It was found that Australia and the Chinese continent are under the relatively favorable condition. As for the soil condition, nutrition resource is short in the desert and unused zone. From the vegetation data obtained from meteorological satellite NOAA, developed was a method for estimating net primary productivity of terrestrial ecosystem and obtained was a global distribution map for the amount of CO2 fixed under the present terrestrial vegetation. At the same time, areas which have great potentiality of tree-planting were selected from the map for estimating potentiality of the global tree-planting. To study the promotion of rainfall as a means of expanding the potential tree-planting area, the conventional meteorological and physical model was improved, and more realistic simulation was made possible. Also as to the water utilization technology, the modeling method was developed. As the area having a potentiality of expanding tree-planting, Australia (especially the west) was cited as the first candidate, and China the second candidate. 108 refs., 128 figs., 49 tabs.

  18. Investigations on an environment friendly chemical reaction process (eco-chemistry). 2; Kankyo ni yasashii kagaku hanno process (eko chemistry) ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    In order to structure a chemical reaction process that does not discharge a large amount of waste by-products or harmful chemical substances, or so-called environment friendly process, investigations and discussions were given based on the results derived in the previous fiscal year. A proposal was made to reduce environmental load on development of oxidized and dehydrogenated catalysts that can produce selectively ethylene, propylene and isobutylene in an oxidation process. In liquid phase oxidation, redox-based oxidation and solid catalyzation of automatic oxidation reaction were enumerated. In acid base catalyst reaction, development of ultra strong solid acid was described to structure no pollution discharging process. In the fine chemical and pharmaceutical fields, the optical active substance method and the position-selective aromatics displacement reaction were evaluated to reduce environmental load. A questionnaire survey performed on major chemical corporations inside and outside the country revealed the following processes as the ones that can cause hidden environmental problems: processes discharging large amount of wastes, processes treating dangerous materials, and processes consuming large amount of energy. Development of catalysts is important that can realize high yield, high selectivity and reactions under mild conditions as a future environment harmonizing chemical process. 117 refs., 23 figs., 22 tabs.

  19. Study of diesel combustion and soot formation as observed by high-speed photography; Kosokudo satsuei ni yoru diesel kikan no nensho oyobi soot seisei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shioji, M.; Yamane, K.; Ikegami, M. [Kyoto University, Kyoto (Japan). Faculty of Engineering; Ito, S. [Nippon Steel Corp., Tokyo (Japan)

    1995-01-25

    In order to contribute to reduction of soot formation in diesel engines, processes of combustion and the soot formation at a low engine speed were studied, especially surveying the effectiveness of high-pressure injection in detail. The experiment was performed by a direct-injection engine and a specially designed injection system with a high-pressure device by fast hydraulic acceleration of spool. The behavior of flames was observed by high-speed photographs, and the processes of combustion and soot formation were compared with the rates of heat release. The distribution of soot particles in the combustion space was observed by the photograph and a laser-light sheet method at various injection pressures and nozzle diameters. The results obtained were as follows: On the condition of high injection pressure and explosive combustion, luminosity of flames over the combustion space is stronger and the luminosity fluctuation becomes less as the injection pressure increases. On the condition of high pressure and small nozzle diameter, soot clouds are observed only in the middle part of combustion process but disappear in the latter. 8 refs., 9 figs.

  20. Study on vibration fatigue damage due to the blow of OPGW aluminum tube; OPGW aluminium kan no kyofu ni yoru shindo hiro hason ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Aikawa, S.; Kohara, H. [Chugoku Electric Power Co. Inc., Hiroshima (Japan)

    2000-03-24

    The cause of damage in the cashing portion of an aluminum tube incorporating OPGW (OPAC 120mm{sup 2}) was investigated and proper measures for the prevention of recurrence were examined. The investigation result of the past accident of the same kind or the result of stress measurement showed that the cause of aluminum tube damage is the fatigue rupture based on the repeated stress occurring by the rolling of OPGW. Moreover, it was known that the attached wire in a jumper lead-in system is most effective and valid as preventative measures of damage. (translated by NEDO)

  1. Study on automatic detection for magnetic particle indications using image processing; Gazo shori ni yoru jifun tansho no jidoka ni kansuru ichikokoromi

    Energy Technology Data Exchange (ETDEWEB)

    Sekine, K.; Suzuki, S.; Iwai, O. [Yokohama National Univ. (Japan). Faculty of Engineering

    1997-07-25

    Magnetic particle indications have a good detection ability to fine surface flaws in high magnetic materials mainly for iron and steel materials, and widely used in the quality inspection of semi-finished steel products and the maintenance inspection of welds due to their simplicity. In this study, concerning the experiment of the magnetic particle indications as an objective of cracks in steel welds including seam cracks of steel billets, the extraction of the flaw indications and the evaluation of its length were attempted by the application of a common personal computer and simple image processing technique. Moreover, the basic investigation on the evaluation of crack depth was conducted, the possibility of the automatic detection of cracks in welds during the maintenance inspection was examined. In the image processing system to detect crack indications, a reflecting light was produced by irradiating an ultra-violet light in the detecting part using two sets of black lights and it was taken by image processing equipment with a lens and camera system, and thus image data were obtained. 9 refs., 11 figs.

  2. 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

    1997-10-01

    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.

  3. Evaluation for characteristics of around the Nojima fault; Butsuri tansa ni yoru `Nojima jishin danso` shuhen no jiban bussei ni kansuru ichihyoka

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, K.; Tsuji, T. [Newjec Inc., Osaka (Japan); Tsuji, M. [OYO Corp., Tokyo (Japan)

    1996-05-01

    Various surveys were conducted for the area around the Nojima fault, including ground surface, two-dimensional electrical and boring surveys and elastic wave tomography, in order to grasp properties of the ground around the `Nojima earthquake fault.` The resistivity image method as one of the two-dimensional electrical methods was used to grasp fault shapes over a wide range of the 1.6km long section extending between Esaki and Hirabayashi. The courses of traverse were set in the direction almost perpendicular to the fault. Boreholes were excavated and elastic wave tomography was conducted between the boreholes on the 9th and 17th courses of traverse, to confirm ground/mountain conditions and to compare the results with observed elastic wave velocities. Very low resistivities are observed at places where granite is distributed, suggesting that the fault-induced changes are not limited to the area around the fault. The zone in which elastic wave velocity decreases is narrow, 10m at the longest, at a velocity of 2.4km/s or lower, which is a low velocity for that propagating in granite. 5 refs., 4 figs.

  4. Model experiments on imaging subsurface fracture permeability by pulsed Doppler borehole televiewer; Pulse doppler borehole televiewer ni yoru kiretsu tosuisei hyoka ni kansuru model jikken

    Energy Technology Data Exchange (ETDEWEB)

    Inagaki, Y.; Niitsuma, H. [Tohoku University, Sendai (Japan). Faculty of Engineering

    1996-05-01

    This paper reports model experiments to evaluate flow rates of fluids passing through a fracture by using a Doppler borehole televiewer (DBHTV). A supersonic transducer disposed on a well axis transmits transmission pulses, and a transducer receives scattered waves generated by particulates in water and waves reflected on a well wall. This signal is applied with time gating to extract only the scattered waves from particulates in the vicinity of the well wall. Deriving spectra in the recorded Doppler signal obtains flow velocity components in the direction of the well radius. A model was made with a polyvinylchloride pipe with a diameter of 14.6 cm to simulate a well, to which an aluminum pipe with an inner diameter of 2 mm is connected to be used as a simulated fracture, and mud water is circulated in the pipe. The result of deriving a passed flow volume in this model by integrating flow rate distribution derived by using the above method to a predetermined range in the vicinity of the fracture showed a good proportional relationship with actual flow rate in the simulated fracture. 1 ref., 7 figs.

  5. Fundamental study on leak detection of underground gas pipeline using passive acoustic method; Judogata onkyo keisoku ni yoru maisetsu gas dokan hason kasho no kenshutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Jinguji, M.; Imaizumi, H.; Kunimatsu, S.; Isei, T. [National Institute for Resources and Environment, Tsukuba (Japan)

    1997-05-27

    With an objective to detect gas leaking from an underground gas pipeline, discussions have been given on a method which utilizes acoustic characteristics of leakage. On leaking sound generated from damaged portions, the form of damaging was hypothesized as pinholes, and spectra of leaking sounds from holes with different diameters were measured. The dominant frequency decreases as the hole diameter increases, while it is in a region of relatively high frequency of 1 kHz or higher. However, detection from the ground surface was impossible when cover soil has thickness from 0.5 to 1.5 m. In an experiment to measure leaking sound inside the pipe, pressure in the pipe was adjusted to 0.02 atm which is a standard pressure for a low-pressure pipe, and the sound was measured when the hole diameters were varied. In any of the results obtained by varying the hole diameter, spectra having the dominant frequency in the region of 1 kHz or higher were measured. In addition, it was found that sound pressure difference of as much as 50 dB at maximum is generated as compared with a case of no sound leakage. The above results verified that monitoring the high frequency of 1 kHz or higher is effective in detecting leakage from small damages. 2 refs., 4 figs.

  6. On the estimation method of hydrodynamic forces acting on a huge floating structure; Choogata futai ni hataraku haryoku ryutairyoku no suiteiho ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kagemoto, H.; Fujino, M.; Zhu, T. [The University of Tokyo, Tokyo (Japan)

    1996-12-31

    A floating structure such as an international airport is anticipated to have a length of about 5,000 m and a width of about 1,000 m. A singular point method may be used as a method to estimate force that such a floating body is subjected to from waves. In order to derive a solution with practically sufficient accuracy, 1250 elements are required in the length direction and 250 elements in the width direction, or a total of 312,500 elements. Calculating this number of elements should use finally a linear equation system handling complex coefficients comprising 312,500 elements, which would require a huge amount of calculation time. This paper proposes a method to derive solution on wave forces acting on a super-large floating structure or fluid force coefficients such as added mass coefficients and decay coefficients at a practically workable calculation amount and still without degrading the accuracy. The structure was assumed to be a box-shaped structure. Strengths of the singular points to be distributed on each element were assumed to be almost constant except for edges in lateral, oblique and longitudinal waves. Under this assumption, the interior of the floating structure excepting its edges was represented by several large elements to have reduced the number of elements. A calculation method proposed based on this conception was verified of its effectiveness. 2 refs., 25 figs., 3 tabs.

  7. Study on fracture behavior within rock made by hydraulic fracturing; Suiatsu hasai ni yoru ganbannai kiretsu no kyodo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-07

    The paper studied the thickness of crack made in deep underground and the distribution of hydraulic pressure of the fluid flowing in the crack. The study having been made were described on hydraulic fracturing, water flow in the crack, and dynamic behavior of cracks. The result was showed of the estimation of width of the crack made in the laboratory experiment and the distribution of hydraulic pressure in the crack. To confirm whether or not the distribution of crack thickness can be estimated from surface displacement even if making the specimen larger by the above-mentioned method, an experiment as small-scale id-situ experiment was conducted with the wall face of mine roadway as the observation area for the displacement. From the surface displacement, validity was discussed of a method to estimate the hydraulic pressure in the crack and the distribution of aperture width. An estimation was attempted of the distribution of aperture width of the crack made in the hydraulic fracturing test conducted in 1992 at the site of the Hijiori hot dry rock power generation. The paper summarized the result of estimating the distribution of hydraulic pressure in the crack and the distribution of crack thickness in experiments different in scale and the knowledge/information obtained in the estimation, based on the pressure distribution determined from the cubic law including the fluid flow friction proposed by Lomize and on the relation between the earth pressure and the crack width of the Bed-of-Nails model. 81 refs., 90 figs., 6 tabs.

  8. Survey of the trend of technical development and industrial policies in Asian countries; Asia shokoku ni okeru gijutsu kaihatsu no doko to sangyo gijutsu seisaku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    A sharp rise in industrial productivity in Asia countries indicates a rising level of R and D technology. Since Japan has not clearly grasped the R and D ability in these countries, it has not given appropriate personnel/material R and D support to them. Therefore, for the purpose of exactly grasping the R and D ability of Asian countries (Korea, Taiwan, the Philippines, Indonesia and India) and studying an effective and appropriate method for R and D cooperation, a survey was conducted of R and D potentials in Asia and R and D support policies of the countries. As a result of the survey, the following are taken up as items to be considered: promotion of exchanges between Tsukuba, etc. in Japan and research/university towns and science parks being constructed in lots of countries, participation of private companies in high-tech joint work in cooperation with Japan, sending information from Japan using internet, etc. and exact grasp of needs at partner side, cooperation given to new comers without asking for research results (use of OB researchers, etc.) 25 refs., 39 figs., 59 tabs.

  9. Research of environmental bioecosensing technology using ecological information. Part 2; Seitaikei joho ni yoru kankyo bio ecosencing gijutsu ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Basic considerations of exploring and cultivating environmental reporter organisms are summarized. Mechanism of genetic engineering amplification and molecular biological amplification, and approach to combining them to a hardware as a bioindicator system are investigated. For the current status of molecular biological measurement technology for measuring ecological environment and its application, environmental diagnosis from a phyropathological viewpoint, environmental diagnosis using microorganisms, test fabrication of genetic sensor, and overseas examples of environmental monitoring network are described. For the application of ecological information and functions for developing innovative environmental remediation technology, issues and potential areas for research and development regarding the bioremediation technology in which the US has achieved a progress for the benefit of soil environment remediation are summarized. For the phytoremediation, an area of bioremediation, the metabolism of microorganisms which live in the rhizosphere, and the technology for controlling the microorganisms in the soil through plants are investigated. 66 refs., 50 figs., 17 tabs.

  10. Questionnaire investigation for the earthquake in Honjo city and Yazawa city, Akita Prefecture; Jishin ni kansuru ishiki chosa (Akitaken Honjoshi oyobi Yuzawashi ni okeru anketo kara)

    Energy Technology Data Exchange (ETDEWEB)

    Nogoshi, M. [Akita University, Akita (Japan). College of Education; Kabutoya, S.

    1996-05-01

    Consciousness for the earthquake was investigated by questionnaire surveys made in Honjo City and Yuzawa City, Akita Pref. in October 1995 twelve years after the Nihonkai Chubu Earthquake (M=7.7) in May 1983. The survey was conducted in terms of 27 items including personality, memory, knowledge/interest, psychology/action, mental attitude/preparations, wishes for researchers and administration, etc. Also included were the items on the Great Hanshin-Awaji Earthquake and the earthquake blank areas. The number of distributed questionnaires and the recovery rate of them are 1500 and 79.2% in Honjo City, and 1700 and 84.7% in Yuzawa City. From the survey, it was found that people have a lot of knowledge of and high interest in the earthquake and well remember it, and a lot of people know of tsunami, liquefaction phenomena, and the earthquake blank area. Further, they are afraid of earthquakes and think of their actions to be taken in case of earthquake. However, most people are little prepared for earthquakes. Important future subjects were suggested for the study of disaster prevention measures. 13 figs.

  11. Study on the effect of measurement points upon reduced added mass matrix; Shukusho fuka shitsuryo matrix ni okeru kansokuten no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-12-31

    It is known in estimating vibration characteristics of a ship that fluid range affects largely a structure. A parameter calculation was performed on node vibration in the vertical direction of a rotating elliptic body such as a ship to investigate the effect of an arranging method of the measurement points upon the result of the analysis. As a result, it is thought that equivalent interval arrangement of 21 measurement points would be sufficient in a lower order side mode of vibrations with less than four nodes. An analysis of calculations performed by arranging measurement points in experimental measurement points revealed that analysis accuracy would not increase even if the number of measurement points is increased if it is done so without considering rotation vector. An experiment was carried out with the number of measurement points increased to verify the above fact, with which the analysis was verified correct. Therefore, as has been forecasted in the previous report, the cause for the analysis accuracy deterioration in a high order mode may be estimated as the effect of the rotation vector. However, since it is not the situation that an analysis considering the rotation vector has been conducted, it cannot be concluded yet that the effect of the rotation vector is the sole cause. 4 refs., 14 figs., 7 tabs.

  12. Investigation on innovation of technology development by means of strategic energy intelligence; Energy senryakurontekina approach ni yoru gijutsu kaihatsu no kakushin ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    For the purpose of developing the future innovative energy technology, the paper described a strategic point of view. Effects of the energy issue are remarkable on the next generation and thereafter as seen in the finite of energy resource, global-scale environmental changes, the increasing energy demand, natural/social influences of large-scale technology development. If the technological development is going on in the same way as until now, there will appear limits. Relating to the strategies, to seek what energy should be among the strategies, it is necessary to consider not only global-scale problems but particular conditions in Japan (self-sufficiency, international cooperation, creativity, etc.) Also, wisdom and technique are necessary to attain it. Technological development in a wide sense plays a major role in the energy strategy. Technology innovation must be advanced according to the energy strategy. Integrating ideology into the development of energy technology and selecting therefrom developmental subjects which meet the purpose, required is the construction of the energy system with high flexibility and functionality. Looking at the conventional way of thinking from a different angle and posing a future pull plan, Japan should show leadership to the world. 20 refs., 25 figs., 8 tabs.

  13. Research on giving antibacteria activity of tailored dental materials; Gin ion ni yoru shikayo zairyo no kokinsei fuyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The secondary dental caries easily occur by breeding of bacteria in cavities between living body and composite resin, false tooth or root of tailored tooth as tooth repairing materials. The antibacteria activity of tailored dental materials was thus studied by implanting Ag ion. The antibacteria effect with time after culture of caries bacteria was studied by implanting Ag ion into SiO2 powder, PMMA samples and Ti alloy samples at 20 and 200keV in energy of ion. In addition, the antibacteria activity of SiO2 powder as composite material was found at 25keV which was previously effective for the antibacteria activity. This SiO2 filler (Ag{sup +} filler) showed the antibacteria activity on every bacteria sample after 2h, and in particular, could kill all of 3 kinds of bacteria obtained from a composite resin surface after 12h. The number of living S. salivarius was reduced by half after 12h. The application of the composite resin filler implanted with Ag{sup +} is significant to prevent recurrence of caries. 5 refs., 27 figs., 7 tabs.

  14. Study of the influence of microgravity on the biological cells and molecular level; Seitai saibo bunshi level ni okeru bisho juryoku no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The shape of osteoblast, gene appearance, gene of rice blast, cellular fusion of plants, gravity acceptance mechanism of unicellular organisms, and physiological and immunity functions of mice were investigated under the microgravity condition. The influence of gravity on the vital reaction and the influence of microgravity on the crystallization of vital substances were also investigated. For the observation of osteoblast, the fluorescence dye reacted with Ca was well taken in the cells. The microgravity affected the stability of rice blast, but hardly affected the protoplast culture of mushroom. The reaction of ciliate against the gravity related to the specific gravity difference between cells and outer liquid. The level of adrenaline in blood of mice increased during the drop. The moving speed of trigger waves of chemical parallel slit formed at the BZ reaction under the microgravity became 60% to 80% of that on the ground. In the case of crystallization at the deposition agent concentration of 1% to 4%, the turbidity showing the degree of crystallization changed complicatedly. Nine processes of crystal growth were recognized. 21 refs., 55 figs., 1 tab.

  15. Studies on the air distribution and thermal performance of the air circulation wall. Part 4. Study on the thermal emissivity of the air circulation layer`s surfaces; Gaidannetsu tsuki koho ni okeru tsuki sonai no netsu tsuki tokusei ni kansuru kenkyu. 4. Tsuki sonai hyomen no hosha tokusei ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Kamimori, K.; Sakai, K.; Ishihara, O. [Kumamoto University, Kumamoto (Japan)

    1996-10-27

    The thermal and air distribution characteristics of the air circulation wall in a heat-insulated system were grasped using an experimental model. In this paper, the difference in the heat exchange between the wall and air was confirmed based on the radiation on the circulation layer`s surface. In this system, thin air circulation layers with ventilating holes at the top and bottom are attached to the south and north outer walls of a wooden building. This system is a kind of passive solar house that achieves the insolation screening effect and the temperature rising effect based on solar collection. The heat flow in a circulation layer is eliminated by the natural convection heat transfer on the outer wall. The heat flow passing through insulating materials is the heat transfer by radiation. The heat flow based on the in-layer natural convection is increasingly eliminated by the decrease in temperature on the air circulation layer`s surface. The decrease in room surface temperature using aluminum foil and the reflective heat-insulated effect showed that the heat passing through the wall surface decreases as the convection heat transfer in an air circulation layer increases. 6 refs., 20 figs., 3 tabs.

  16. Fiscal 2000 survey report on the survey and research on green technology industry; 2000 nendo green technology industry ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    The approaches of the Government and local autonomies to green technologies are surveyed toward the construction of a green technology industry. The present activities and future outlook of environmental industries interested in green technologies are surveyed and examined, the green technologies here including (1) energy conservation measures and development of non-fossil fuels, (2) energy-related and environmental measures for countering global warming, (3) waste treatment measures for countering dioxins and endocrine disrupters. A survey is conducted of the outlines and future trends of green technology related important studies now under way at laboratories and research institutes of universities, the Government, and private-sector corporations. Based on the results of the surveys, important subjects of technical development in green technologies are extracted and studied for the possibility and outlook of their practical application. Tasks to discharge and problems to occur before they are introduced to the market are also evaluated and confirmed. Based on the results of the research and development of green technologies, actualities of environmental industries are taken up, and the problems and tasks to be settled before environmental technologies are introduced to the market are investigated and studied. (NEDO)

  17. Study of seismic data acquisition using physical modeling system; Butsuri model jikken sochi wo mochiita data shutoku gijutsu ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Tsukui, R.; Tsuru, T. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center; Matsuoka, T [Japan Petroleum Exploration Corp., Tokyo (Japan)

    1996-10-01

    For the physical modeling system of Technology Research Center, Japan National Oil Corporation, data acquisition on the ocean and ground can be simulated using models. This system can provide data for verification of the data processing and elastic wave simulation algorithm. This can also provide data for decision of experiment specifications by making a model simulating the underground structure of the given test field. The model used for the physical modeling system is a gradient multilayer model with six-layer structure. Depth migration before stacking was conducted using data obtained through two acquisition methods, i.e., up-dip acquisition and down-dip acquisition. The depth migration before stacking was performed for data obtained by up-dip acquisition in addition to the records obtained by down-dip acquisition. Consequently, a definite reflection surface was observed, which has not been observed from the processing results of down-dip acquisition data. 9 figs.

  18. Report on the cooperative study of technology to collect valuable resources in brine; Kansuichu no yuka shigen kaishu gijutsu ni kansuru kenkyu kyoryoku hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The paper reported on the research, design, and evaluation on a system to recover by sedimentation magnesium from the brine in the salt manufacture by solar evaporation in Mexico, and a system to recover by adsorbent lithium, boron, etc. from the brine of the solar pond salt field in China. In the case of Mexico, an overall recovery system was developed, but in the evaluation of economy of the system, it cannot be said that the system is feasible even if assuming that the required fresh water can be secured. It was found out that the economical efficiency largely depends upon the cost of hydrated lime and the selling price of magnesia clinker. In the case of China, a plant for production of 500 tons/year of lithium carbonate was conceptually designed to evaluate the economical efficiency. As a result, the internal profitability of the plant is not so high, approximately 6%, though continuously profitable during the operation of 15 years. It was indicated that the project was not economically very efficient. 164 figs., 44 tabs.

  19. Basic research on the development of 'intelligent-type' humidity control materials; Intelligent gata choshitsu zairyo no kaihatsu ni kansuru kiso kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tomura, S.; Maeda, M.; Inukai, K.; Ohashi, F.; Suzuki, M.; Suzuki, K.; Shibasaki, Y. [National Industrial Research Institute of Nagoya,Nagoya (Japan)

    2000-10-25

    The water vapor adsorption desorption isotherms of purified and/or synthesized sepiolite, allophane, diatomite, selectively leached kaolin and mesoporous silica were measured to develop humidity control materials in living environments. Based on Kelvin's capillary condensation theory, suitable pore diameters for controlling relative humidity at 40 and 70% were calculated to be 3.2 and 7.4 nm, respectively. Wakkanai diatomite, purified allophane, selectively leached kaolin and mesoporous silica have suitable pore diameters and high water adsorptivity, and were considered as candidates for humidity self-control materials. Among these materials, mesoporous silica formed as a tile showed the best performance as a humidity control material in desiccator and model house levels. (author)

  20. FY 1998 report on the results of the technology development on the integration of nerve information; 1998 nendo shinkei joho togo ni kansuru gijutsu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    This R and D aims at developing the interface system including 2D multipoint high density electrode elements which measure and analyze the information processing process of cranial nerves at high speed and in minute detail. The R and D were carried out on the following 4 subjects: 1) development of 2D high density multipoint electrode; 2) development of alignment/bonding technology; 3) development of technology for existence maintenance/activation of nerve cells; 4) study of performance evaluation and applicability of the system. In 1), an electrode is developed in which the high density multipoint platinum electrode was built on glass substrate, and the following are conducted: making a pattern of alignment of this electrode, making the shape of electrode 3D, and technical development of surface composition. In 2), the following are developed: technology to align cells on the patterned electrode element correctly and technology to bond cells on the element for a long time. In 3), the following are developed: functional materials to hold living nerve cells/nerve systems on the electrode element for a long time, nutrition system, and technology to monitor the state of cells/systems on the substrate. In 4), conducted are the evaluation of performance of the developmental system and the applicability to the screening in nervous function molecular search, etc. (NEDO)

  1. Study of initial stage in coal liquefaction. Increase in oil yield with suppression of retrogressive reaction during initial stage; Ekika hanno no shoki katei ni kansuru kenkyu. 1.

    Energy Technology Data Exchange (ETDEWEB)

    Uesugi, K.; Kanaji, M.; Kaneko, T.; Shimasaki, K. [Nippon Brown Coal Liquefaction Co. Ltd., Tokyo (Japan)

    1996-10-28

    For the coal liquefaction, improvement of liquefaction conditions and increase of liquefied oil yield are expected by suppressing the recombination through rapid stabilization of pyrolytic radicals which are formed at the initial stage of liquefaction. Two-stage liquefaction combining prethermal treatment and liquefaction was performed under various conditions, to investigate the effects of reaction conditions on the yields and properties of products as well as to increase liquefied oil yield. Consequently, it was found that the catalyst contributes greatly to the hydrogen transfer to coal at the prethermal treatment. High yield of n-hexane soluble fraction with products having low condensation degree could be obtained by combining the prethermal treatment in the presence of hydrogen and catalyst with the concentration of slurry after the treatment. This was considered to be caused by the synergetic effect between the improvement of liquefaction by suppressing polymerization/condensation at the initial stage of reaction through the prethermal treatment and the effective hydrogen transfer accompanied with the improvement of contact efficiency of coal/catalyst by the concentration of slurry at the stage of liquefaction. 4 refs., 8 figs.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-10-28

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

  3. Investigation on behavior of bacteria in reservoir for microbial enhanced oil recovery; Biseibutsuho (MEOR) no tameno yusonai saikin katsudo ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    Fujiwara, K.; Tanaka, S.; Otsuka, M.; Nakaya, K. [Kansai Research Institute, Kyoto (Japan). Lifescience Research Center; Maezumi, S.; Yazawa, N. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center; Hong, C.; Chida, T.; Enomoto, H. [Tohoku University, Miyagi (Japan). Graduate School of Engineering

    2000-07-01

    Behavior of bacteria activated in reservoir though molasses-injection-tests, was investigated using the restriction fragment length polymorphism analysis with the polymerase chain reaction (PCR-RFLP) method, for elucidating potential bacteria to suppress in situ growth of microbes to be injected into the reservoir in the microbial enhanced oil recovery (MEOR) process. As a result, some bacteria belonging to Enterobacteriaceae species or their close relative species were grown predominantly in the reservoir, among bacteria inhibiting in the ground-water. The foregoing indicates that behavior of these bacteria in reservoir must be taken into consideration when giving a full account of behavior of microbes to be injected into the reservoir to put the MEOR process into operation. Potential proliferation using molasses to activate those bacteria was also estimated on the laboratory tests, to clarify the growth of microbes to be injected into the reservoir to operate the MEOR process. In consequence, it became clear that these bacteria have a potential growth exceeding 10{sup 8} CFU/ml, utilizing molasses. These facts indicated that microbes to be injected into the reservoir at the MEOR field tests are necessary to grow more excellently than bacteria inhabiting in the ground-water. In addition, as flow, the injection fluid is influenced by reservoir heterogeneity caused by injection of molasses, it was inferred that microbes to be injected into the reservoir at the MEOR field process are also necessary to grow more remarkably than bacteria inhabiting in the reservoir brine at high permeability zones and bacteria inhabiting in the reservoir rock. Furthermore, the results of the functional testing for MEOR conducted in the presence of bacteria activated through molasses-injection-tests indicated the importance of effective use of microbes to be injected, taking into account the characteristics of the reservoir and function for MEOR of those microbes. (author)

  4. Studies on hollow spherical aluminum silicate cluster. Synthesis of environment friendly materials; Chuku kyujo aluminium keisan`en cluster ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ohashi, F.; Maeda, M.; Suzuki, M.; Watamura, S. [National Industrial Research Institute of Nagoya,Nagoya (Japan)

    1999-01-25

    Synthesis of microfine particles of nanometer size, their surface adulteration and control of microstructure take an important position in different areas, such as electronics, chemical, machine and metal industries. However, reports on the established methods for synthesizing hollow spherical particles of nanometer size, which may be applied to micro capsules, cannot be found except for fullerene composed of carbon. This paper introduces a new method for synthesizing hollow spherical amorphous aluminum silicate cluster called allophane as an earth environmental material, and the derived properties of allophane. (translated by NEDO)

  5. Study on search for antioxidant peptides in unused protein resources and their production; Miriyo tanpaku shigen kara no kosanka pepuchido no tansaku to seisan ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For the development of antioxidants that are high in use value, peptides are produced in a bioreactor from so-far-unused or little-used protein resources originating in marine organisms collected along the Sanriku coast, and antioxidants that they may contain are searched for. Three kinds of red alga, eight kinds of brown alga, and internal organs of processed fish are treated in the bioreactor. The bioreactor is a rotary membrane type especially built for the effective decomposition of proteins in this study. Reaction solutions containing proteins and enzymes are let through an ultrafiltration membrane module in rotation at a high speed, and the products with their molecules reduced in weight are effectively taken out of the system (free of clogging). The specimens checked for antioxidant features are all found to be positive when subjected to the iron rhodanide method or carotene method, the two methods determining the change in the amount of oxygen in hydroperoxide and {beta}-carotene that are produced when the linolic acid is oxidized. Every one of the specimens prepared for this study exhibits antioxidant features in plural, different mechanisms. It is necessary to collect further basic findings about oxidation inhibiting mechanisms for the development of more active antioxidant peptides. 39 refs., 46 figs., 8 tabs.

  6. Study on data transmission method for power line maintenance information system using OPGW. OPGW riyo sodensen hoshu joho system no denso hoshiki ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Kanemaru, K.; Toyota, S. (Hitachi Cable, Ltd., Tokyo (Japan))

    1994-02-20

    Composite fiber-optic overhead ground wires (OPGWs) installed to the major power transmission lines are applied as the information transmission routs with large capacity. An effective system for the power line maintenance operation is able to be set up by using said OPGWs to collect and transmit various kinds of maintenance information on the power lines. However, since it is necessary for the whole equipment to meet the highest transmitting speed required by the system if a single transmission method is applied throughout the power lines for transmitting the maintenance information, the system loses its economy as a whole. In this paper, for the purpose of transmitting effectively the various maintenance information in power line maintenance information system using OPGWs, and considering the required transmission period as well as the types of the data occurrence, an optic fiber transmission system constituted hierarchically and composed of high-speed trunk line and low-speed local line is suggested. Especially, regarding the low-speed local lines, random transmission method shows the superior properties in the transmission efficiency and low power-consumption compared with the cyclic transmission method. 9 refs., 9 figs., 4 tabs.

  7. Comparative study on the characteristics of AC, DC servomotors and hydraulic motors; Dendoki to yuatsu motor no tokusei taihi ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Konno, Y. [Shibaura Inst. of Tech., Tokyo (Japan); Nakano, K.

    1997-07-15

    The relationship of the output torque and power rate of the electric motor with the inertial moment and the mass of the motor is investigated, and the validity of the study is verified in reference to the specifications given in catalogs. Based on the result of the investigation, comparison with the characteristics of the hydraulic motor is carried out. Paying attention particularly to smaller size, lighter weight and accelerating performance of the AC and DC servomotors and the hydraulic motor, the relation among the data, rated values and performance of motors by the assumption based on the performance principle is exhibited to clarify the comparison of the performance. It is made clear that the relationships hold good with the catalog data of actual machines not only for DC motors but also for AC motors. In addition, similar relationships are obtained for the hydraulic motor, and it is made clear that they agree with the result of the investigation. The tendency of distribution based on the relationships among data, rated values and performance of motors obtained by inference is given in this report. 18 refs., 7 figs., 1 tab.

  8. Study on the living environment of semi-underground room with attached green house; Fusetsu onshitsu no aru hanchikashitsu no kyojusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, T.; Tsukayama, N. [Ochanomizu University, Tokyo (Japan)

    1996-10-27

    In response to demand for the expansion of living space, the living environment of semi-underground room has been investigated. An attached green house (passive solar house) is adjacent to the semi-underground room. This is reinforced concrete construction, having flat type solar collector on its roof and lighting window in its north side. It does not have artificial air conditioners. Based on the measurements of daylight factor, artificial lighting is not required at the window in the daytime, but it is desirable to use daylight and artificial lighting together at the center. The performance of sound insulation depends on the high performance soundproof sash level. There is less daily temperature variation due to its large heat capacity, and less yearly temperature variation than the outside. By shielding the solar radiation, the insolation in the green house in summer can be restricted in the same as in winter. The insolation can be easily received in winter due to its large vertical intensity of solar radiation. The green house in the south side is useful for improving the living environment of semi-underground room. The temperature rise in the semi-underground room can be restricted by opening window in summer. It is desirable for the comfortable living to use artificial cooling to reduce the daytime temperature by 3 to 4{degree}C. In winter, it is comfortable to heat by 4 to 5{degree}C. 2 refs., 7 figs.

  9. Study on the detached house plan using of a maximum natural energy. Part 1; Shizen energy fukugo riyo no keikaku ni kansuru kenkyu. 1

    Energy Technology Data Exchange (ETDEWEB)

    Wada, I.; Mino, M.; Miyata, T.; Okawa, M. [Nihon University, Tokyo (Japan)

    1996-10-27

    The geographical position or environment is set on the assumption that the natural energy of a detached house is used in a hybrid state. Moreover, the energy consumption of the house and the natural energy supply obtained from the geographical position were compared and investigated. As a result, the energy consumption is 10,617 kWh, and the energy supply is 8,236 kWh. About 78% of the whole consumption can be theoretically made from natural energy. The energy supply is calculated on the low side during prediction. Therefore, an increase in the energy supply is expected by installing a solar collector based on solar energy, expanding the solar panel area, and increasing the number of wind mills. However, this energy is partially lost via an inverter while it is supplied to the general domestic equipment. At the six main points in Tokyo and its districts, the adaptability of natural energy used based on the regional characteristics is investigated presently and the installation of a system is examined. 13 refs., 2 figs., 6 tabs.

  10. Research and development cooperation project on environmental measurement using laser radar in fiscal 1995 (environmental network); Kankyo keisokuyo laser radar no kaihatsu ni kansuru kenkyu kyoryoku (kankyo network)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    As a part of the cooperative work with Indonesia of R and D of a laser radar for environmental measurement, the paper described the development of an environmental network. The field survey was conducted in April, July and December 1995 and in March 1996. For the investigational research, five meetings of the committee and four times of group work were held. The Asian environmental network was studied in terms of its arrangement, operation and management, and the overall network/path control design were being prepared. To make the persons concerned abroad and in Japan understood the APEC Osaka Conference held in November 1995, a homepage APEC `95 Kansai was opened using WWW (World Wide Web, a decentralized hyper media system which can dispatch information to the whole world by network using hyper text). Moreover, in connection with this, a homepage was opened of CICC (Center of the International Cooperation for Computerization, a center controlling the whole Asian environmental information network system where E-mail and data are exchangeable with Indonesia via Tokyo NOC (Network Operation Center)). 49 figs., 8 tabs.

  11. Study on mechanical behavior of the deep embeded steel sheet pile cellular bulkhead. Neire no fukai hagane yaita cell shiki gogan no rikigaku teki kyodo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Higashigawa, T.; Achiwa, F. (The Chubu Electric Power Co. Inc., Nagoya (Japan)); Matsuo, M. (Nagoya Univ., Nagoya (Japan). Faculty of Engineering); Sunami, S. (Nikken Sekkei, Osaka (Japan))

    1991-09-20

    At the Hekinan coal-burning thermal power station of Chubu Electric Power Company, there is a plan to construct its ash dump by closing the neighboring sea area with bulkheads. This bulkhead is deeply embeded steel sheet piles to be struck into a soft clay layer. Since it is necessary to improve the ground in a wide area for stabilization of soft clay, the specifications as well as the scope of improvement of the basic design plan were noticed, a qualitative study of the bulkhead was done by a numerical analysis aiming at realization of a rational and economical bulkhead and an execution plan which modified the above was prepared. In this execution plan, the reduction as much as about 9% became possible for the construction cost of about 1km long bulkheads. In order to demonstrate the adequacy of this execution plan, loading tests were conducted on full-size cellular bulkheads corresponding to the basic plan as well as the execution plan. As a result, the tested values agreed very well with the analytical results and upon comparison between them, the displacement at the tip of the cellular bulkhead and other measured values showed no meaningful difference, thereby it was confirmed that the execution plan had the same level of stability as the basic plan. 5 refs., 26 figs., 5 tabs.

  12. Simulation model study of limitation on the locating distance of a ground penetrating radar; Chichu tansa radar no tansa kyori genkai ni kansuru simulation model no kochiku

    Energy Technology Data Exchange (ETDEWEB)

    Nakauchi, T.; Tsunasaki, M.; Kishi, M.; Hayakawa, H. [Osaka Gas Co. Ltd., Osaka (Japan)

    1996-10-01

    Various simulations were carried out under various laying conditions to obtain the limitation of locating distance for ground penetrating radar. Recently, ground penetrating radar has been remarked as location technology of obstacles such as the existing buried objects. To enhance the theoretical model (radar equation) of a maximum locating distance, the following factors were examined experimentally using pulse ground penetrating radar: ground surface conditions such as asphalt pavement, diameter of buried pipes, material of buried pipes, effect of soil, antenna gain. The experiment results well agreed with actual field experiment ones. By adopting the antenna gain and effect of the ground surface, the more practical simulation using underground models became possible. The maximum locating distance was more improved by large antenna than small one in actual field. It is assumed that large antenna components contributed to improvement of gain and reduction of attenuation during passing through soil. 5 refs., 12 figs.

  13. Study on grout-filled coupling steel sleeve. Part 1. Basic characteristics; Kokan sleeve wo mochiita grout juten shiki tekkin tsugite ni kansuru kenkyu. 2. Kisoteki seino

    Energy Technology Data Exchange (ETDEWEB)

    Takeda, K.; Shimizu, T.; Hayashi, Y.; Sato, Y. [Okumura Corp., Osaka (Japan)

    1994-11-15

    With an objective to establish a design technology on a grout-filled bar-reinforced joint consisted of a sleeve made of electric resistance welded steel tube and grout, discussions were given on the effects of different factors on the joint performance. The factors discussed include the kinds of grout (cement paste and mortar), reinforcing bar settlement length, and reinforcing bar quality. Increase in the grout strength causes the joint strength and rigidity to increase. To obtain the strength and rigidity equivalent to those in the reinforcing bars in the base material, the compaction strength required in the grout for the case of SB400 class reinforcing bars is 900 kgf/cm{sup 2}. A longer settlement length may increase the joint strength and rigidity, but its effect on tenacity is not clear. Increased grout strength can improve the tenacity. The maximum deposition stress increases in proportion with the compaction strength of the grout in any of the reinforcing bar unyielding positions and the yield occurring positions. The experiment resulted in estimating the following three fracture modes: a fracture mode with reinforcing bar slipping out without yield, a fracture mode with a reinforcing bar slipping out after yield, and a reinforcing bar tensile fracture mode. 7 refs., 7 figs., 2 tabs.

  14. Investigational research on CO2 isolation technology in fiscal 1995; 1995 nendo nisanka tanso no kakuri gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper studied present technical subjects and future study subjects of the CO2 isolation technology in order to clarify technical and social problems and the developmental subjects of the CO2 isolation technology and related technologies for separating/concentrating CO2 emitted in relation to quantity consumption of fossil fuel and storing it in ocean or underground. Main items for the study were: (1) investigational study of the technology of CO2 ocean storage, (2) investigational study of environmental effect assessment in storing CO2 in ocean, (3) investigational study of the technology of CO2 ocean storage, etc. Technologies required for the ocean isolation were arranged such as CO2 storage, injection, dispersion technique, CO2 behavior simulation, and the developmental subjects were extracted. Further, in the deep-sea bottom storage method, a simulation to calculate the range of PH effects was conducted presuming the specified amount of CO2 and applying known physical values, and evaluation of the CO2 ocean discharge/solution method was made. A method was also studied for experiments on water bacteria and benthos. 127 refs., 102 figs., 81 tabs.

  15. Research cooperation in the development of laser radar for environmental measurements. Environmental network; Kankyo keisokuyo laser radar no kaihatsu ni kansuru kenkyu kyoryoku. Kankyo network

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Among the research cooperation in the development of laser radar for environmental measurements with Indonesia between FY 1993 and FY 1996, results of the research and development of the environmental network are summarized. For the environmental information network, the Tokyo NOC is linked as an Internet connection point in Japan with the Jakarta NOC using an international dedicated line with a capacity of 64 Kbps. The Tokyo NOC is linked with domestic environmental information researchers using Internet. Thus, data stored in the data processing system of laser radar can be exchanged, information in both countries can be exchanged using E-mail, and data can be accumulated. For the research cooperation with Indonesia, research of path control and information relay server, research of effective transmission of data on the network, and research of multimedia communication have been conducted. The multimedia communication, distributed processing, and extension of dedicated line network using PPTP have been also conducted. 39 figs., 4 tabs.

  16. Research report of fiscal 1997. Study on profitability evaluation technique for waste power generation; 1997 nendo chosa hokokusho. Haikibutsu hatsuden ni kansuru keizaisei hyoka shuho no kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    For diffusion of waste power generation, cost reduction is important. As the profitability evaluation technique for conventional waste power systems, a simple recovery year method, total waste treatment cost method, generation cost method, and evaluation method by accumulated balance sheet are presented along with their principles. For the generation cost method, trial calculation results are presented based on documents reported. From methods for the study in Institute of Applied Energy, some estimation methods of construction cost are presented, and generation cost and profitability evaluation were studied by parametric accumulation method. The profitability was calculated for RDF power systems, and it was clarified that although as a whole this system is more efficient than a simple refuse incineration system, the balance sheet of local governments is dependent on a responsibility range for the facility. In a combined type (super refuse power generation), generally municipalities bear a combustor and boiler, while a prefecture bears generation facilities. Because of large scale generation, the profitability is dependent on a selling price of electricity. 37 refs., 36 figs., 24 tabs.

  17. Basic investigation on deflection wave propagation and strength of very large floating structures; Choogata futai kozo no tawami hado denpa kyodo to kyodo ni kansuru kisoteki kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Tsubogo, T.; Okada, H. [University of Osaka Prefecture, Osaka (Japan). Faculty of Engineering

    1997-08-01

    The response strength in which deflection waves propagating in the elastic body of a large floating structure with an order of km in length and width was investigated. Attention was paid to the waves propagating the place fully away from the boundary of a very large floating body so as to obtain the dispersion relation of waves and the relation between incident waves and deflection waves. Next, the frequency response was checked from the aspect of the displacement amplitude and strength for beams and plates. The dispersion relation of waves propagating the place fully away from the boundary of a very large floating body and the relation between the waves and infinite-point incident waves were represented by an expression. Similarly, the waves propagates more than the infinite-point incident waves in frequency, wavelength, and speed. A lower-limit value exists in the propagation speed. The displacement and stress amplitudes are represented by a relational expression. For plates, the displacement amplitude increases when the wave direction coincides with the small-rigidity direction. The stress amplitude is maximized when the waves corresponding to the ``wave below a floating body = size of a characteristic wave number`` reach the large-rigidity direction. 10 refs., 10 figs., 2 tabs.

  18. Study on the rigid zone of reinforced concrete frames under horizontal loading; Suiheiryoku wo ukeru tekkin concrete ramen kako no goiki ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Otsuki, K.; Suzuki, K. [Muroran Institute of Technology, Hokkaido (Japan)

    1995-11-10

    This paper describes analysis of rigid frame models consisting of columns and beams by using the three-dimensional finite element method, and a proposal on the resultant simple rigid zone equations. Four types of the analysis models were selected that assume columns in the middle of rigid frames, outer columns in the middle of the rigid frames, beams in intermediate floors, and beams in the uppermost or lowermost floor. Rigid zone lengths are calculated from the difference in floor heights in both of beamed columns and pure columns when shear force on the beamed columns at unit horizontal displacement becomes equivalent to that of the pure columns. Discussions on the results of the finite element method and various rigid frame analyses discovered the following results: some values derived from the conventional rigid zone length calculation formula may not correspond with the FEM values depending on member cross sectional shapes; there is a risk of causing a large error depending on the rigid frame shapes regardless of adopting or not adopting the rigid zone if the rigid frame analysis is performed by using a deflection angle method; and the result of a rigid frame analysis using the proposed rigid zone estimation formula that takes expansion and contraction of the members into account corresponds with the FEM analysis result with sufficiently high accuracy. 5 refs., 8 figs., 16 tabs.

  19. Investigation on research for improvement of automatic technology of underwater processing; Suichu netsukako gijutsu no kodoka jidoka ni kansuru kenkyu chosa

    Energy Technology Data Exchange (ETDEWEB)

    Katsumura, M.; Ogawa, Y.; Sumitomo, T.; Yoneda, S.; Tanaka, M.; Morita, T.; Sakakibara, M. [Shikoku National Industrial Research Inst., Kagawa (Japan)

    1997-01-20

    Improvement and automation of the underwater thermal technology were investigated as a part of the basic technology common to the ocean development. Elements of study required for the underwater technology development are the element common to that required in the atmospheric air and the element attributable to high pressure and submerged atmospheric environment. The element technologies required are those for welding, bonding, cutting, surface treatment, cleaning, inspection, etc. In underwater, much higher grade technology is required than on the ground in view of human work ability and safety. The technology development is thought to be toward to autonomy and intellectualization, but the complete change at once to autonomous task robot is difficult in view of the degree of technology maturation. There are a wet method (perfect submergence or local drying) and a dry method as the underwater welding method, but automation of the wet method has not advanced yet. The method is divided also by a difference in water depth to be applied. Depending upon the object, it is better to improve manual handling and to develop work support equipment. As subjects common to each processing technology, separately studied was each of technologies of heat source control, metallurgical phenomena in high temperature/pressure atmospheric air, and automation. 474 refs., 116 figs., 32 tabs.

  20. Study on artificial hatching of sturgeon. Ovulation induction and artificial hatching of sturgeon; Chozame no jinko fuka ni kansuru kenkyu. Chozame (besuteru) no hairan yuhatsu to jinko fuka

    Energy Technology Data Exchange (ETDEWEB)

    Omoto, N.; Maebayashi, M. [Hokkaido Electric Power Co. Inc., Sapporo (Japan)

    1999-03-19

    With an objective to develop a technology serving for making Hokkaido more active industrially, a study has been carried out on culturing sturgeons by the biological environment group at the general research institute of Hokkaido Electric Power Company. The study has performed induction of ovulation and spermatozoon discharge by hormone treatment, artificial fecundation and hatching. In hormone treatment, emulstified LH-RHa was injected first into male individuals anticipated to have matured, and into female 24 hours later. Fecundation was performed by inseminating into roes the spermatozoon diluted by fresh water of volume as great as 100 times that of the spermatozoon. The result of this experiment revealed that artificial hatching is possible even under the frigid environment of Hokkaido by giving matured sturgeons a hormone treatment. However, such problems are still left that there are individuals that do not ovulate even the hormone is given, and hatching rate of obtained roes is low. The important point in the hormone treatment technology is in selection of matured parent fishes. Regarding female individuals, a more efficient and precise maturity determination method is desired than the method to observe gonads by biopsy. (NEDO)

  1. Survey report on an environmental harmony type production system of chemical products; Kankyo chowagata kagaku seihin seizo system ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    As part of establishing an environmental harmony type production system of chemical products, study and survey were made on PET bottles. Using the life cycle analysis method (LCA), a study was made for proposing a material recycle (MR) method which is environmentally and economically excellent in the stage of recycling waste PET bottles. The total cost of recycling can be reduced by 34% supported by a decrease in equipment cost and improvement in yield if there is no mixture of foreign substances such as aluminum caps and PVC bottles. However, the ratio of the amount obtained from the reduction to the total production cost is small, and it is necessary to take measures from a viewpoint of the cost in a total production process and environmental loads. In a survey in Kawaguchi city, PET bottles discharged from the business sector occupied 41% of all the discharge amount. In a survey in Yokohama city, very important data were obtained on PET bottles appointed as the second type under the recycle law. The quality of PET bottles to be brought to the recycling plant is important for effectively processing PET bottles in MR method. For achievement of MR which is low in cost and small in environmental load, needed were cooperation by citizens, the shipping management system in autonomous government, and changes in design and material quality to be made by the industrial circle. 8 refs., 64 figs., 68 tabs.

  2. Study on soil-structure interaction considering transverse isotropy in soil. Yokotoho dansei jiban to kozobutsu no doteki sogo sayo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kurimoto, O. (Obayashi Corp., Tokyo (Japan))

    1994-02-10

    This paper describes an analytical discussion on dynamic interactions between a transversely isotropic soil (that shows isotropy in the horizontal plane and anisotropy in the vertical and horizontal directions) and a structure. The discussion indicates that, with transversely isotropic and elastic body, a plane strain condition and a stress condition other than that come different in the relation among shear rigidity, Young's modulus, and Poisson ratio, and that the stress-strain relational formula can be expressed by using the Young's modulus and the Poisson ratio. The paper then describes an analysis that reports the following result: in transversely isotropic soil, the real part and the imaginary part of horizontal impedance and the imaginary part of rotation impedance have small difference due to anisotropy, but the real part of the rotation impedance has large difference due to anisotropy. A seismic response analysis has been performed on a PWR nuclear reactor building which is assumed to be supported on transversely isotropic soil. The result indicates that no large anisotropy effect is given on the main vibration mode of the building. 13 refs., 12 figs.

  3. Overview of EPA`s proposal revision of the particulate matter standard; Beikoku kankyo hogocho ga teianshita ryushijo busshitsu kankyo kijun ni kansuru kaiteian no gaiyo

    Energy Technology Data Exchange (ETDEWEB)

    Maejima, K. [Japan Automobile Research Institute Inc., Tsukuba (Japan)

    1997-11-01

    U.S. Environmental Protection Agency in 1997 announced the new environmental standards covering the particulate matter (PM) smaller than 2.5{mu}m or less in diameter. As a document that explains how the standards came to be released, the original of the essay (made public in 1997) of R.O. McClellan and F.T. Miller is introduced. The themes discussed in the essay include: U.S. Clean Air Act and National Ambient Air Quality Standards; concept of PM; PM in the air (airborne PM): PM 10{mu}m or less in diameter and PM 2.5{mu}m or less in diameter; respiratory tract as PM`s target organ (respiratory system from nose and mouth to the remotest pulmonary alveolus); vital reaction (response of organism to PM); PM-related environmental standards, past and present; recent reviews concerning PM (various subjects that are attributed to exposure to PM, including: untimely death, changing for the worse of diseases relating to the respiratory system and cardio-vascular system, changes in pulmonary function, increase in the number of symptoms relating to the respiratory system, changes in pulmonary tissues and structures, changes in the defense mechanism of the respiratory system, etc.). 70 refs., 14 figs., 5 tabs.

  4. Experimental study on the response of very large floating structures (VLFS) in wave; Choogata futaishiki kaiyo kozobutsu no harochu oto ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ota, M.; Ikegami, H.; Yamaguchi, Y. [Mitsubishi Heavy Industries, Ltd., Tokyo (Japan)

    1997-10-01

    The elastic response of VLFS of 1200m long in wave was studied experimentally using a water tank and integral elastic model of 1/80 scale. As offshore airport, a ultra- thin box type floating structure of 5km long, 1km wide and several meter thick is used, and the effect of elasticity is not negligible for such a structure. The experiment used a water tank of 160m long, 30m wide and 3.1m deep. Supposing a water depth of 20m for real VLFSs, the experiment was carried out mainly in a local shallow water area prepared with a temporary bottom together with that in a deep water area. A simple mooring equipment with a linear spring equivalent to real VLFSs was used. The integral floating model was prepared by not mechanical but welded junction to obtain uniform elasticity. The response in wave showed a complicated 3-D behavior, offering useful data for verification of a behavior estimation method. The response was nearly equal between shallow and deep water areas at the same wave length, and the response amplitude in regular waves was equivalent to the significant amplitude in long and short crested irregular waves. 7 refs., 8 figs., 3 tabs.

  5. Required grades of hull steel plates in consideration of fracture toughness; Hakai jinsei wo koryoshita sentaiyo koban shiyo kubun ni kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Yajima, H.; Yamamoto, M.; Ogaki, Y. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering

    1997-10-01

    This paper discusses the required grades of hull steel plates based on the steel ship rule of Nippon Kaiji Kyokai (NK). The minimum value of the allowable crack length in NK rule (critical safety crack length at 0degC just before brittle unstable crack causing fatal fracture) was estimated. In the case where the estimated crack tip exists in a matrix, the crack length was a minimum of 200-210mm, while nearly 60mm in a fusion line at high-heat-input welded joint. The allowable crack lengths estimated from a specified value in the NK rule were fairly different. The allowable crack length at 0degC was also estimated from the minimum value in V-notch Charpy impact test. The private proposal on the required grades of hull steel plates in consideration of fracture toughness was discussed. Thirty-five percent of crack lengths found in real ships is 100mm or less, however, cracks of 250-400mm long are frequently found suggesting the allowable crack length of 400mm. The required grade integrally considering required values and design conditions is demanded to secure the reliability of hull strength. 5 refs., 5 figs., 2 tabs.

  6. Study of seismic data acquisition using physical modeling system; Butsuri model jikken sochi wo mochiita data shutoku gijutsu ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Tsukui, R.; Tsuru, T. [Tech. Research Center, Japan National Oil Corp., Tokyo (Japan); Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan)

    1996-05-01

    The Physical Modeling System introduced into the Technology Research Center, Japan National Oil Corporation, and data collected by use of the system are presented. The Physical Modeling System is 10,000 times smaller than the real one, comprising a water tub section, measuring device section, and control section, etc. The water tub section comprises a tub for housing the model, transducers for transmitting and receiving vibration, controllers, etc. The water tub measures 1.8{times}1.2{times}0.9m. The model used in the experiment is an `inclined multilayer model` with each of its six layers pinching out toward the top, and is usable for the comparison of various migration methods. In one case in the records, reception was made at 184 reception points deployed at intervals of 3mm, when the minimum offset was 15mm and the maximum offset 564mm. Nothing very obvious was observed when the ordinary overlapping of DMO and CDP was applied to this record, which suggests that pre-overlapping migration treatment is required. 5 figs.

  7. Study on the performance improvement of multiblade fans. Effects of suction cones; Tayoku fan no seino kaizen ni kansuru kenkyu. Suction cone no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Kuratani, F.; Ogawa, T. [Hyogo University of Teacher Education, Hyogo (Japan); Yamamoto, S.

    1999-07-25

    In order to improve the performance of a multiblade fan, the effects of three types of suction cones of the fan casing on the fan efficiency and noise are investigated experimentally. The first type of the suction cone is the insertion type, which is inserted into the inside of the fan impeller. The second type is the extrusion type, which extrudes outside from the casing surface. The third type is the combination type of two types. The results of those three types are compared with those of the commonly used suction cone. The followings are made clear: (1) The insertion type and the extrusion type are effective in improving the efficiency and reducing noise. (2) The optimal lengths of the insertion and the extrusion exist. (3) The combination type is more effective in improving the efficiency. (4) The combination type with the skewed cutoff of the fan casing shows the best effect. (author)

  8. Time intervals of the cavitation bubble`s collapse near a free surface; Jiyu hyomen kinbo deno cavitation kiho no shukiteki hokai ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Mori, S.; Doihara, R. [Kyushu University, Fukuoka (Japan); Takahashi, K.; Nagayama, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1998-09-25

    Cavitation bubbles induced by pulsed laser near a free surface have been investigated experimentally and numerically. The successive pressure waves from them and their vertical migrations and volume change were measured by using hydrophone and high-speed streak camera. The characteristics of the first and second rebound times due to the distance from the free surface enable us to guess the mechanisms of bubble collapse with microjet. Because our new scheme by CIP method is successfully applicable for such two-phase flow, the comparison between experimental and numerical results- is also very useful to understand the fundamental factor of the complicated phenomena of cavitation bubbles. 23 refs., 10 figs.

  9. Integrated interpretation of AE clusters and fracture system in Hijiori HDR artificial reservoir; Hijiori koon gantai jinko choryuso no AE cluster to kiretsu system ni kansuru togoteki kaishaku

    Energy Technology Data Exchange (ETDEWEB)

    Tezuka, K. [Japan Petroleum Exploration Corp., Tokyo (Japan); Niitsuma, H. [Tohoku University, Sendai (Japan)

    1997-05-27

    With regard to a fracture system in the Hijiori hot dry rock artificial reservoir, an attempt was made on an interpretation which integrates different data. Major factors that characterize development and performance of an artificial reservoir are composed of a fracture system in rocks, which acts as circulating water paths, a heat exchange face and a reservoir space. The system relates not only with crack density distribution, but also with cracks activated by water pressure fracturing, cracks generating acoustic emission (AE), and cracks working as major flow paths, all of which are characterized by having respective behaviors and roles. Characteristics are shown on AE cluster distribution, crack distribution, production zone and estimated stress fields. Mutual relationship among these elements was discussed based on the Coulomb`s theory. The most important paths are characterized by distribution of slippery cracks. Directions and appearance frequencies of the slippery cracks affect strongly directionality of the paths, which are governed by distribution of the cracks (weak face) and stress field. Among the slippery cracks, cracks that generate AE are cracks that release large energy when a slip occurs. Evaluation on slippery crack distribution is important. 7 refs., 8 figs.

  10. Fiscal 1998 research report on new recycling technology for waste lube oil; 1998 nendo haijunkatsuyu no recycle no shingijutsu ni kansuru chosa kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    For effective use of resources and environment conservation, R and D was made on recycling technology for recovered waste lube oil. On the R and D on removal of ash and chlorine contents in waste lube oil, iron oxide-carbon composite was found as adsorbent which can reduce ash content and chlorine content to 0.02wt% and 5ppm, respectively. On the research on the applicability of waste lube oil as melting furnace fuel for bottom ash and fly ash, as the melting experiment result at a real plant, the recycled heavy oil obtained by simple treatment of waste lube oil showed dioxin decomposition rates more than 99.9% and dioxin concentrations less than 0.6ngTEQ/Nm{sup 3} in waste gas, achieving the targets regulated by Air Pollution Control Law. The applicability of waste lube oil as fuel was thus confirmed. On the research on the applicability of waste lube oil as fuel for power generation in oil refineries, both waste lube oil alone and mixed oil with residual oil were available as gasification fuel through design considering ash content removal, and reasonable selection of equipment and piping materials considering chlorine. (NEDO)

  11. 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

    1996-12-31

    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.

  12. Investigational study of optical function materials for two-dimensional data processing; Nijigen joho shoriyo hikari kino zairyo ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The paper investigated/studied `space light modulation materials,` `dynamic hologram/memory materials,` `optical waveguide path materials,` etc. which become key materials in the high speed two dimensional processing. As to electrooptical materials proposed in this investigational study, the external electric field and the electric charges generated make quality of molecules themselves directly change to memory strong/weak signals of light. Therefore, the response velocity becomes less than a millionth of that of the liquid crystal display, and high speed which is needed for realtime moving image processing is anticipated. Hologram includes the phase information in addition to information on light strength. Therefore, it is a large capacity record medium and at the same time a record medium which can read/write two dimensional information as it is. With optical fiber, images cannot be transmitted as they are. Light waveguide path materials are those that accumulate roles of mirror and lens in a sheet of the material and construct a system which is strong in vibration, as optical parts connecting among materials for two dimensional data processing. 273 refs., 107 figs., 17 tabs.

  13. Survey on the construction of realization scenario of large-scale revegetation of arid regions; Daikibo ryokuka no jitsugenka scenario sakusei ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    In order to fix carbon dioxide as a measure to mitigate global warming, research of large-scale revegetation of arid regions has been conducted toward the ultimate goals of systematizing revegetation technologies centered on securing and using water resources, evaluating the feasibility of arid revegetation by extending the viewpoint to examine even rainfall increase by artificial means, and establishing a strategic program for large-scale revegetation. A trial revegetation feasibility map was made for a selected target region in Western Australia, and rough revegetation steps were formulated. Selection of proper region, introduction of technology, and planning were conducted by grasping environment of the target revegetation region. As a result, it was found that growth of plants is vigorous at the catchment areas due to the surface water transfer along the topography of surface in spite of poor rainfall. Obstruction of plant growth is partly caused by the corrosion of soil and accumulation of salt, but mainly caused by the shortage of water. Based on these data, ranking of proper regions was evaluated. When the technology is introduced in the region with A-rank, several times of water can be collected. 60 refs., 61 figs., 30 tabs.

  14. Investigation of nitrous oxide (N2O) abatement technologies. 2; Asanka chisso (N2O) no teigen taisaku ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Emission amount of nitrous oxide (N2O) from anthropogenic sources is analyzed, and reduction effects by the abatement technologies are evaluated. The concentration of nitrous oxide in the atmosphere continues to increase and emissions from agricultural and ecosystem sources are drawing particular attention. For the emission of N2O in Japan, 8.28 Gg-N2O per year is emitted from fossil fuel combustion facilities, 6.95 from waste incineration facilities, 22.5 from transportation vehicles including automobiles, 26.7 from the chemical industry including establishments engaged in adipic acid production, 2.1 from sewage treatment facilities including septic tanks, 6.3 from farmland, and 7.1 from livestock excrement. For the N2O abatement technologies for different sources, fuel improvement, high temperature combustion, acceleration of reduction decomposition reaction, and development of catalysts are significant for the combustion technologies. In connection with N2O discharged in the process of adipic acid production, major businesses have internationally committed to up to 99% abatement of the N2O emissions by 1998. With regard to wastewater and sewage treatment facilities and septic tanks, improvement in COD/NO-N ratio, retention period, pH level, and reduction process is pointed out. 204 refs., 70 figs., 53 tabs.

  15. Investigations on measures to reduce nitrous oxide (N2O); Asanka chisso (N2O) no teigen taisaku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Discussions were given on measures to reduce N2O as part of the measures to prevent global warming. Nitrous oxide has a long atmospheric lifetime of 150 years, and its greenhouse warming potential will increase by 310 times that of CO2 after 100 years. It can also be a cause of ozone layer destruction. Nitrous oxide is estimated to have influence of about 10% as compared with CO2 even under the present conditions. Discharge of N2O from manufacturing process of adipic acid is aimed to be eliminated totally by 1998. Improvement in efficiency of combustion of fossil fuels and wastes serves most effectively to reduce not only N2O but also CO2. Nitrous oxide generated in sewage treatment as in sewage purifier may be reduced if the batch process is turned into a continuous process, but assistance from policy side would be required for wider adoption of the process conversion. No environmental regulations are applicable to N2O, whereas a problem is present that the number of system installation would not grow because of economic reasons even if the system is feasible technically. Another problem is that the N2O reducing technology is in trade-off relation with other warming gases such as NOx and methane. Comprehensive technological evaluations aimed at optimization must be moved forward in the future. 236 refs., 102 figs., 78 tabs.

  16. Study on the optimum design of bus window pillar join40t; Bus window pillar ketsugo buzai no saiteki sekkei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tomioka, N. [Nihon University, Tokyo (Japan); Lim, S.; Kim, M.; Lee, H.; Kang, S.; Bae, D.

    1997-10-01

    Automobile body structure is generally assembled using various spot welded box sectional members. Especially, in the case of the bus, the shape of window pillar joint is assembled m T-type. This T-type member has some problem such as high stress concentration, low fatigue strength and structural rigidity. Therefore, in this report, performed a study on the optimum design of the bus window pillar joint for such problem by FEM analysis and experiments. 1 ref., 10 figs., 2 tabs.

  17. Research and development cooperation project on environmental measurement using laser radar in fiscal 1994; Kankyo keisokuyo laser radar no kaihatsu ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The paper outlined activities in fiscal 1994 in the R and D cooperation project on a laser radar for environmental measurement. In the activities in fiscal 1994 of `the ODA laser radar development committee,` the committee held four meetings, two field surveys were carried out, and two researchers were invited from Indonesia. In the field survey, the environment in Jakarta city was investigated in terms of changes in population and number of the cars registered. Further, from data collected during 1994-1998 in the central Jakarta city, the following were made clear: the trend of a decrease in SO2, the trend of a rapid increase and an excess of NO2 content over the environmental standard, the status of pollution of which the level is close to the upper limit of the environmental standard of dust, etc. In the meeting of the policy study for the field survey at LIPI headquarters, Japan proposed a system which is constituted of a difference absorption laser radar, two Mie scattering laser radars, and a central processing unit. The sites proposed were studied in cooperation with Indonesia. 40 refs., 65 figs., 9 tabs.

  18. International symposium on environmental impacts of advanced alternative to CFC; CFC shinki daitai busshitsu no kankyo eikyo ni kansuru kokusai symposium hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-02-07

    The international symposium on environmental effects of new CFC substitutes was held in Tsukuba City, Ibaraki Pref. on February 7-9, 1996, and 19 papers were made public. In Session 1 (Plenary lecture), reports were made on Global warming and climate change: a review of recent studies; Stratospheric ozone, CFCs, and CFC-substitutes: an update, etc. In Session 2, Measurements of OH rate constants for advanced refrigerants as well as HCFCs and HFCs; The reaction rate of CFC alternatives with OH radical; Experimental and estimated rate constants: reactions of hydroxyl radicals with several halocarbons, etc. In Session 3, Measurement of uptake coefficients of some acetyl halides and fluorinated ethers into water; Mass transfer at the air/water interface: removal processes of halocarbonyl compounds; Heterogeneous reactions of fluorinated ethers on allophane or titanium dioxide, etc. In Session 4, papers were reported on model calculations relating to the global warming.

  19. Internal flow of Coanda nozzle and effect on dispersion of cohesive powders; Coanda nozzle no naibu nagare to gyoshu ryushi no bunsan koka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Oba, H.; Honda, I.; Nakayama, H. [Kumamoto University, Kumamoto (Japan). Faculty of Engineering; Miyamoto, H. [Yachiyo National College of Technology, Kumamoto (Japan); Nagaoka, O.; Ishikawa, T. [Mitsui Mining Co. Ltd., Tokyo (Japan)

    1994-10-25

    A Coanda nozzle was fabricated as a device to feed powder into a classifier and at the same time as a device having dispersing action on cohesive powders, in order to study the mechanism of its internal flow condition and flows affecting the dispersing action of the particles. The nozzle shape is such that it has a tube widening toward its end placed downstream a circular jet to have the nozzle execute strong dispersing actions on cohesive powders by increasing turbulence in the flow. This device has the sucking flow rate exceeding by eight times of the jet flow rate, hence it is useful as a particle feeding device. Time averaged flow in the nozzle is governed dominantly by the velocity in the axial direction, and shows a velocity distribution approximately symmetrical axially that has a maximum value in the vicinity of the wall face in the rear to the jet outlet because of the Coanda effect. The Reynolds stress consists of the main stress component predominant. The turbulence shows a maximum value in the vicinity of the tube wall. The cohesive powders are dispersed possibly by the main stress component in the Reynolds stress in the air flow, the repetition of compression and swelling, in addition to the shear force and collision acting on the particles as a result of velocity difference between the particles and the air flow. 5 refs., 8 figs.

  20. Study on the modification of woods by means of dielectric heating; Yuden kanetsu wo riyoshita mokuzai no kaishitsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuo, T. [Chubu Electric Power Co. Inc., Nagoya (Japan)

    1996-11-01

    Japanese cedars, which were planted in great quantities as a postwar recovery policy, are currently under the main felling period. Their material is soft, and it takes long time for their drying. Due to these weak points, it is hard to expand their utilization as industrial materials, and they can not increase their demand. Proper thinning can not be conducted, which results in waste forests. This became a serious problem for Japanese resource protection as well as for forest industry. Local explosive treatment process has been developed to modify the permeability of cedar woods by means of high-frequency dielectric heating, which was cooperated with Nagoya University as a part of effective utilization of electric power. For this process, cedar woods are pressurized and heated in a short time by high-pressure steam and high-frequency dielectric heating. Then, the pressure is instantaneously released. Closed cell wall pores are opened by utilizing the evaporating and expanding force of moisture content within woods. Thus, permeability of the central part of trunks can be improved same as that of the peripheral part. This process is effective to be applied to pretreatment of the agent injection treatment process, such as antiseptics. This process can be introduced in wood companies. 13 figs., 2 tabs.

  1. Research and development cooperation project on environmental measurement using laser radar (environmental network) in fiscal 1993; Kankyo keisokuyo laser radar no kaihatsu ni kansuru kenkyu kyoryoku (kankyo network)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    For the purpose of contributing to the research cooperation project on the development of a laser radar for environmental measurement, the paper surveyed the present and future trend of the environment related information network in Indonesia. The survey was conducted in terms of a name of the network, the main administration body, the number of users, the utilization status, the use protocol, details of service, domestic mode installation sites and the main administration body, accounting system, types of the network used, reliability and stability of network, limitations on the use and details of the limitation, etc. The plan for expanding telecommunication equipment is being advanced in a very quick tempo. However, there are many problems in digitalization, and it is feared that the plan will be delayed. As to telecommunication quality and connection quality, the telecommunication completion rate, SCR, is very low, approximately 24% on average, which is equal to that around 1990 in Japan. The business service for users is all bureaucratic since they have a lot of applications for the installation piling up with no exception to the rule of developing countries. 23 figs., 10 tabs.

  2. Application of photovoltaic generating system to electric power in large ship; Taiyoko hatsuden system no ogata senpaku eno oyo ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Katagi, T.; Ogawa, S.; Nishikawa, E.; Hashimoto, T. [Kobe University of Mercantile Marine, Kobe (Japan); Ishida, K.

    1996-10-27

    This paper describes the design of electric power system in a ship with photovoltaic power generating system, to examine applicability of the photovoltaic power generating system to the inboard power source. It also discusses effectiveness of the system for sea environment. At first, the actual route of a car carrier, meteorological data, and quantity of power consumption were picked up from the deck logbook and engine logbook. Then, the installation area of photovoltaic arrays, the quantity of photovoltaic power generation derived from the quantity of solar radiation, and the capacities of batteries and inverters were calculated, to design the electric power system in the ship with photovoltaic power generation system. Moreover, the NOx and SOx emissions were compared between the present power system and the usual power system using diesel power generator, to discuss the effectiveness of the present system for sea environment. Consequently, it was found that the emission of NOx was reduced by about 33% and the emission of SOx was reduced by about 28% compared to the usual power system. The effectiveness for sea environment was confirmed. 9 refs., 5 figs., 4 tabs.

  3. Experimental investigation of pile-soil interaction under confining stress. Kosoku atsuryokuka no kui to jiban no sogo sayo ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, M.; Asano, T.; Koga, A.; Mizuno, T. (Okumura Corp., Osaka (Japan))

    1992-11-10

    As a problem concerning the interaction between the pile and the ground under the constrained pressure, the deep zone of the large diameter pile receiving the horizontal load was investigated. The behavior of the ground around the large diameter pile receiving the horizontal load is thought to be varied depending on the depth. The deep zone which is thought to be governed by the secondary behavior on the horizontal plane due to the loading effect was investigated by a simulation experiment to obtain the ground deformation and the fracture pattern. The results were as follows: (1) Concerning the displacement by the load, a break point appeared on the load-displacement curve when the load is small (displacement is less than 1 % of the pile diameter). However, when the displacement proceeded furthermore, the curve was straightened and no peak load value appeared, (2) When the displacement exceeded 10 % of the pile diameter, the slide took place. The slide propagated in the direction of loading as the load was increased, (3) Inside the sliding plane, the compressive strain is dominant, while outside, little compression strain occurs, (4) The direction along which the sliding plane appears is almost identical to the direction along which no relative expansion and shrinkage take place. 21 figs., 2 tabs.

  4. Studies on reducing the thermal loads of solar-pumped solid state lasers; Taiyoko reiki laser no netsufuka teigen ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, K.; Yugami, H.; Naito, H.; Arashi, H. [Tohoku University, Sendai (Japan)

    1997-11-25

    It was intended to reduce the thermal loads of solar-pumped solid state lasers (highly densified solar light is irradiated directly onto a laser medium to cause excitation. No electric power is required for the excitation.). For this purpose, experiments were performed by using a selective permeation film. Solar light includes wavelengths not effective for excitation, which causes heat generation and thermal loads such as lens heating effect and thermal stress compounded refraction, degrading the laser beam quality. The Nd:YAG was used as a laser medium, and a multi-layered film (composed of SiO2 and TiO2) which cuts wavelength below 500 nm as a selective permeation film to cut light having wavelengths not required for excitation. A laser transmitting experiment revealed that the slope efficiency is improved by 27% as compared to not using the film. Beam fluctuation was improved to 45%. Using the selective permeation film has realized more efficient conversion of the solar light into a beam with better quality. The results for calculation of heat lens effect by using temperature distribution simulation showed good agreement with experimental values. Using the selective permeation film can suppress the maximum temperature of a laser rod to 68%, as well as the thermal stress. 9 figs., 2 tabs.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-12-31

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

  6. Basic studies on computer aided concurrent engineering for hull structure design and piping design; Kakugi ittai wo koryoshita doji heikotekina sekkei no shien ni kansuru kisoteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Aoyama, K.; Sawada, K. [The University of Tokyo, Tokyo (Japan)

    1996-12-31

    Considering integrated hull and piping design in shipbuilding industry as a good example for concurrent engineering (CE), discussions were given on a computer aided method to perform integrated hull and piping design smoothly. When CE aiding by means of a computer is considered, it is important to discuss a method for information management not only for `utilization of product models`, but also for `maintaining consistency between items of product information` and `concurrent utilization and production of product information` in concurrent designs. For the CE aided information management, utilization and production of the product information is effective if restrictive relationship between items of product information, and design functions are made clear. Definitions were given on the restrictive relationship between items of product information and `restrictive relationship information` that has `decision/provisional decision`, `date and time`, `designer` and `design functions`. Furthermore, `comprehensive relationship between items of product information` that can be produced from the restrictive relationship information was defined as a `restrictive network`. Utilizing the restrictive relationship between items of product information for CE aiding is effective. 9 refs., 14 figs.

  7. Studies on surface structures and mechanism of photocatalytic action of semiconductor oxides; Handotai hikari shokubai no hyomen kozo seigyo to sayo kiko kaimei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Takeuchi, H.; Sona, S.; Koike, H.; Hori, H.; Negishi, N.; Kohara, H.; Ibusuki, A. [National Institute for Resources and Environment, Tsukuba (Japan); Vakhtin, A.; Borovkov, V. [New Energy and Industrial Technology Development Organization, Tokyo, (Japan)

    1997-02-01

    Studies are made to define the working mechanism of semiconductor photocatalysts such as TiO2 and to establish designing guidelines for improving on their activity and functions. TiO2 in the air actively produces oxygen seeds for the oxidation and removal of NOx, etc. It is desired that a catalyst have a specific surface area large enough to retain the product of its action. To meet the need, a thin-film photocatalyst which is an aggregate of TiO2 crystals is produced by burning a film of a sol/gel system of reaction doped with macromolecules. This product has a larger specific surface area and is higher in pollutant-removing performance, and may be put into practical use. In another experiment, metal-carrying particles TiO2 suspended in water are employed for the reduction of CO2. Though the main product of catalysts carrying Pt or Pd is methane, a photocatalyst carrying RuO2 produces acetic acid mainly and loses less activity with the passage of time. A hybrid photocatalyst is composed of an organic pigment and inorganic semiconductor, synthesized through a covalent bond between a sililated-surface thin TiO2 film and porphyrin. It is confirmed that the newly developed process brings about an increase in electron migration efficiency. 3 figs.

  8. Study on property-gradient polymer electrolyte for rechargeable lithium batteries; Lithium niji denchi no tame no keisha tokusei kobunshi denkaishitsu no sosei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kokumi, Z.; Kanemura, S.; Inaba, M.; Takehara, Z.; Yao, K.; Uchimoto, Y. [Kyoto University, Kyoto (Japan)

    1997-02-01

    This paper describes the fundamental experiments for creating property-gradient polymer electrolyte for rechargeable lithium batteries. The rechargeable lithium battery is composed of an anodic composite agent section with high ion conductivity, a separator equivalent section with high mechanical strength (high bridging degree), and a section surpressing the precipitation of metal lithium by contacting with it. The continuous property-gradient polymer electrolyte was tried to be synthesized by means of the plasma polymerization method. As a result, plasma polymerization electrolyte with high ion conductivity could be prepared from the liquid phase by using a monomer with low vapor pressure. Porous material simulating the anodic composite agent was impregnated by the monomer, which was plasma-polymerized. As a result, it was found that the bridging degree decreased from the surface towards the inside of the plasma-polymerized porous material. In addition, polymer was prepared using fluorine-base monomer. Thus, LiF thin film could be prepared through the reaction between the polymer and metal lithium. 3 figs.

  9. Research cooperation project on conservation and sustainable use of tropical bioresources; Seibutsu tayosei hozen to jizokuteki riyonado ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Research cooperation has been conducted on the conservation of biological species inhabiting in the tropical rainforest in developing countries in tropic zone and the sustainable use of genetic resources using biotechnologies. For the research cooperation with Thailand in FY 1996, research of the food acquisition strategy of the Primates has been conducted. A total of 19 species of animals and plants, i.e., 7 species of arbors, 7 species of herbs, and 5 species of insects, were newly confirmed for pig-tailed monkey. In Indonesia, a feasibility study was conducted on the information center of Indonesian tropical bioresources. For the research of culture collection of bacteria, 113 strains of acetic acid bacteria and 85 strains of lactic acid bacteria were separated from Indonesian specimens, and they were identified. An agreement was concluded with Malaysia, and discussions were conducted for the concrete implementation plan. For the project, construction of a database was investigated for bioresources including bacteria and higher animals useful for industries. Maintenance of gene bank was also investigated. 391 refs., 61 figs., 93 tabs.

  10. Study on the effect of micro-gravity on bio-functions; Seitai kino eno bisho juryoku no eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The effect of micro-gravity on bio-functions and vital reaction was studied using the facility of Underground Gravity-free Experiment Center Co. On the effect on osteoblast shape and gene expression, although fluorochrome reacting with Ca was well taken into cells, no significant difference in Ca content in cells was observed before/after falling. Expression of genes related to cell propagation was controlled under micro-gravity. Protoplast fusion of Lentinus was unaffected by micro-gravity. The mRNA fragments of gravity sensitive mutant of rice plant were affected by micro-gravity. Paramecium was set swimming in solutions with different specific gravities. The reaction behavior of Paramecium was affected by the difference in specific gravity between cell bodies and solutions. The water content metabolism functions of a mouse with needle stimulus, in particular excretory, were slightly promoted by micro- gravity. The cortisol level in blood of a falling mouse group rose showing strong stress. As the preliminary study on the geotaxis of insects, motion of bagworm was observed. 12 refs., 38 figs., 4 tabs.

  11. Survey of pollution-resistant plants and their cultivating techniques; Osen busshitsu taisei shokubutsu to sono shokusai gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The reduction of forests due to environmental pollution has been surveyed, to investigate the pollution-resistant plants and solid microorganisms. In Japan, the blight of needle-leaf trees (pine and momi fir) and of Japanese oak has occurred, and blight of some other trees, such as wild cherry trees, Japanese apricot trees, birch, Japanese cedar, cypress and bamboo, has been reported from various regions. In this article, plants reported to be resistant to pollutants are listed, and the physiological features of these plants are described. Furthermore, to develop pollution-resistant plants, reports relating to clarification of the mechanism of resistance development and the genes involved are reviewed. Microorganisms which symbioses for roots support these root functions. They also suppress the activity of pathogenic microorganisms and improve the environment around the roots, thus helping plants to grow normally. The roles played by symbiotic microorganisms and how to utilize these organisms are discussed. Their functions in coping with acid rain and heavy metal pollution, and how to utilize such functions are also discussed. 707 refs., 13 figs., 13 tabs.

  12. Research report of fiscal 1997. Basic research on the commercialization of innovative energy technologies; 1997 nendo chosa hokokusho. Kakushinteki energy gijutsu no jitsuyoka ni kansuru kiso chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper summarizes the research result in fiscal 1997 from the basic research results on the commercialization of innovative energy technologies. The target of a photovoltaic power generation market includes isolated power sources (several kWp) for distant places or developing countries, and those (several tens kWp) for personal residences or public facilities. Although the former is mainly promoted in the West, while the latter over the world, their profitability is unsolved. Power plants over several hundreds kWp are in demonstration test. Solar heat power generation of several tens to hundreds MWp is most profitable, however, small-scale one is poor in feasibility. Australia takes an interest in distributed photovoltaic power generation directly connected with actual lives of residents, and has a dominant opinion that desert is useless as large-scale site. This country lays emphasis on protection and maintenance rather than positive use of desert based on a basic cognition that desert is easily changed and broken. The Australian government announced power company`s obligation to use renewable energy by 2%, and a strong organization is scheduled to be newly established. 59 figs., 57 tabs.

  13. Independent activity plan for reducing the emission of sulfur hexafluoride (SF6) in the electric industry; Denki jigyo ni okeru rokufukka io (SF6) haishutsu yokusei ni kansuru jishu kodo keikaku ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-11-01

    This paper describes the reduction of SF6 emission in the electric industry. The weight and size of equipment can be reduced by SF6, which is widely used for electric equipment such as gas circuit breakers and gas insulation switches due to its safety. The gas circuit breaker occupies over 70% of circuit breakers above 66 kV-class ones. The gas insulation switches are employed for all of 275 kV-class substations at 13 locations in central Tokyo. The site area for constructing substations can be drastically reduced, and underground substations can be constructed in urban areas. On the other hand, it has been recently pointed out that SF6 gas is one of the greenhouse gases, and SF6 was added as an emission reduction gas by COP3. Since an effective alternative insulation gas of SF6 has not been found out, the suppression of its emission in the air is planned as an activity for reducing the SF6 emission. For the protection of leakage during inspection of equipment, the present emission amount 40% is to be reduced down to 3%. For the recovery from the abandoned equipment, the emission amount is to be reduced up to 1%. Systems for reusing and managing SF6 are to be independently enhanced. 1 fig.

  14. Study on the optimal control of the ground thermal storage system in the greenhouse. Part 4; Onshitsu ni okeru taiyo energy dochu chikunetsu system ni okeru saiteki seigyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Zheng, M. [Sanko Air Conditioning Co. Ltd., Osaka (Japan); Nakahara, N. [Kanagawa University, Yokohama (Japan)

    1996-10-27

    Three types of weight in both energy saving and optimum room temperature environment were changed to obtain the optimal control solution of the ground thermal storage system in a greenhouse. The relation diagram between the optimal solution of a performance function, and the state constraints and control function constraints was created in consideration of the energy term in a control function value area and the room temperature environment. As a result, the whole image of the performance function could be grasped in consideration of the energy term with inequality constraints and the room temperature environmental term in this study. The rate of a weighting factor in the performance function significantly influences the optimal solution. The influence on the optimal solution also changes when the optimal room temperature schedule differs. The influence that three types of rising algorithm exert on the convergence and converging speed was investigated. Superiority or inferiority occurs according to the space properties of a performance function. A zigzag method is most disadvantageous. The constraints can be converged to the optimal solution using an SUMT outer point method irrespective of the initial value. 6 refs., 6 figs., 4 tabs.

  15. Investigation studies on renewable energy resources in Asia. Wind and solar energies in Vietnam, Malaysia; Asia ni okeru saiseigata shizen energy kaihatsu shuho to fusonryo ni kansuru chosa kenkyu. Vietnam oyobi Malaysia ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, Y.; Takada, M.; Ono, H. [Mie University, Mie (Japan). Faculty of Engineering; Loc, N.; Khan, N. [Hanoi Institute of Technology (Viet Nam); Bardaie, M.; Ismail, W.; Yahya, A. [University of Pertanian (Malaysia)

    1996-06-01

    Wind and solar energy in Vietnam and wind energy in Malaysia were calculated for their amounts available in respective areas based on meteorological data. Annual average wind velocity 30 m above the ground in Vietnam is 4 to 5 m/s in many points of coastal areas, and a little lower in the inland. On the other hand, wind velocity may exceed 9 m/s in sea areas (on islands). According to the result of a trial calculation using data derived from all the observation points, 10-kW generators and 20-kW generators, if installed, may have their operation factors exceed 20% in many points. Even compared with Cape Tappi, Aomori Prefecture, Japan, where the operation factor is 18.7%, these points in Vietnam are suitable for wind power generation. Average wind velocity 30 m above the ground in Malaysia is only about 4 m/s even at high altitude. However, wind with velocity from 7 to 9 m/s may appear depending on districts. If 10-kW and 20-kW generators are installed, the operation factors in Mersing and Langkawi would exceed 30% and 20%, respectively, where wind has sufficient value of utilization. The operation factor may be low in areas other than the above districts. However, since the observation data were those taken in urban areas, collection of further detailed data is necessary. 4 refs., 7 figs., 3 tabs.

  16. Report on research achievement in relation with developing fundamental combustion control technologies in fiscal 1998. Research and development of high-performance industrial furnaces; 1998 nendo nensho seigyo kiban gijutsu no kaihatsu ni kansuru kenkyu seika hokokusho. Koseino kogyoro nado ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Development is intended to be made on fundamental combustion control technologies applicable to high-performance industrial furnaces that can reduce energy consumption and respond to environment preservation requirements. With an intention to achieve reduction in combustion exhaust gases such as carbon dioxide and nitrogen oxides, fundamental studies will be made on factors to decide flame shapes as represented by high-temperature combustion and flame shape control by utilizing microgravity environment, and researches will be made on combustion systems. Devices required for the experiments were fabricated to evaluate critical combustion characteristics of flames in furnaces including industrial furnaces, analyze and evaluate flame control parameters, and study low-pollution combustion technologies. Experimental methods acquired by 1997 were used for the experiments under the microgravity environment. Evaluation experiments were performed on flame shape control technologies and flame radiation characteristics, and basic experiments on the low-pollution combustion technologies. With these experiments, elucidation of the combustion mechanisms was launched by analyzing and evaluating the acquired data. A flame experimenting device for high-temperature preheated air completed by fiscal 1997 was used to acquire such combustion characteristics data as NOx discharge characteristics when the high-temperature preheated air is used. Based on the result thereof, verification was carried out on simulation models. (NEDO)

  17. Report for fiscal 1997 on simple operation type CAD/CAM system development through international cooperation. Joint research cooperation; 1997 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Kyodo kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This report describes Japan's joint researches with China, Indonesia, Malaysia, Singapore, and Thailand under the above-named project (MATIC) which were carried out in fiscal 1997. Scientists are invited to Japan from the above-named countries, to whom Japan's status of researches is explained and with whom discussion is conducted about progress in general and system development in those countries, and about verification tests. Japanese scientists visit research institutes of those countries so as to appraise the progress of researches and technological levels and to install computers for verification tests. Scientists visiting this country upon Japan's invitation and workshop held in Japan are enumerated below. Accepted by Working Group I (automobile and parts) are scientists from Indonesia and China and workshops from two countries; accepted by Working Group II (electrical home appliance) are scientists from Malaysia and workshops from five countries and then from four countries; and accepted by Working Group III (fiber and apparel) are scientists from China. Visits are made by the Working Groups to Thailand, Indonesia, Malaysia, Singapore, and China. (NEDO)

  18. Report for fiscal 1995 on simple operation type CAD/CAM system development through international cooperation. Committee activity record; 1995 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Iinkai katsudo kiroku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This paper reports the committee activities in fiscal 1995 on research cooperation for developing an electronics design and production aid system of simple operation type (MATIC). This fiscal year has decided the directionality of MATIC promotion by activities carried out by the different committees. These activities relate to research and development themes, the basic policies of the research and development along with the themes, research and development themes linked with overseas countries, and promotion methods. The working group (WG)I has discussed and deliberated specific research and development items to promote research and development of automobiles and components thereof as the promotion theme, promotion of the research and development, and technical problems. The committee consists of researchers at the related corporations participated in MATIC. The WGII has taken up household appliances and parts thereof, and the WGIII textiles and apparels as the research and development themes, and given specific discussions for promoting the research and development. The paper also reports the activities taken by different committees for promotion of the production-based futuristic type integrated information system, and promotion of the MATIC technologies, operation and cooperation. (NEDO)

  19. Report for fiscal 1995 on simple operation type CAD/CAM system development through international cooperation. Cooperation for joint researches; 1995 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Kyodo kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Reported herein are the joint research results of the project (manufacturing technology supported by advanced and integrated information system through international cooperation (MATIC)), implemented in China, Indonesia, Malaysia, Singapore and Thailand by Center of International Cooperation for Computerization, commissioned by NEDO. Japan invited researchers from each country to explain the research themes, and discussed construction of the systems in each country. Japanese experts visited the research institutes and cooperative works in these countries, to discuss the research cooperation themes, and survey the conditions and technical levels of these research institutes, and information infrastructures. The oversea researchers were invited to Japan for the MATIC international seminar, discussions for research cooperation themes, and MATIC cooperation promotion committee. Textile and apparel researchers were also invited from China. Japanese experts visited China, Indonesia, Malaysia, Singapore and Thailand for the on-the-spot surveys for each working group. (NEDO)

  20. Report for fiscal 1997 on simple operation type CAD/CAM system development through international cooperation. Research achievements; 1997 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Kenkyu seika

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper reports the achievements in fiscal 1995 in the research and development project for an electronics design and production aid system of simple operation type (MATIC). The project is intended to support works of Asian countries on the information society, and enhance levels of the manufacturing industries and supportive industries by utilizing the information technologies. The working group (WG)I, related to automobiles and components thereof, improved functions of the primary system and continued demonstration tests. The group launched for the secondary system a system development that makes timely information transmission and receipt possible among research and development enterprises, local assembly enterprises and facility and parts suppliers. The WGII (household appliances and their parts) designed and developed an electronic catalog system based on pre-prototypes developed independently by different countries, and performed demonstration tests. The WGIII (textiles and apparels) carried out with China demonstration tests on the international EDI system, translation system and CAD/CAM system. It also developed a sewing technology standards system. It installed equipment and devices in Indonesia for preparation of the demonstration tests. (NEDO)

  1. Report for fiscal 1997 on simple operation type CAD/CAM system development through international cooperation. Committee activity record; 1997 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Iinkai katsudo kiroku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper reports the research and development project for an electronics design and production aid system of simple operation type. The project (MATIC) has been executed to support works of Asian countries on the information society, and enhance levels of the manufacturing industries and supportive industries by utilizing the information technologies. Fiscal 1997 has entered full-fledged demonstration experiments, and decided the project directionality as a result of different committee activities as to policies, contents and promotion methods for research, development and demonstration experiments. The working group (WG) 1, composed of members having professional knowledge on automobiles and components thereof, has deliberated specific research and development items, promotion of the research and development, technical problems, promotion of joint researches with overseas countries. The WG II, composed of members having professional knowledge on household electric appliances and their parts, discussed promotion of research and development of household electric appliances and their parts. The WG III, composed of textile and apparel expertise members, made attempts in promoting the research and development of household electrid appliances and their parts. This paper describes other committee activities including promotion of operation and cooperation on production-based futuristic type integrated information system and MATIC technologies. (NEDO)

  2. Report for fiscal 1998 on Simple Operation Type CAD/CAM System Development through International Cooperation. Report on the achievements of counterparts overseas; 1998 nendo 'kan'i sosagata denshi sekkei seian shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Kaigai counter part seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Concerning the subject matter, achievements of China, Indonesia, Malaysia, Singapore, and Thailand are reported. In China, a technical data transfer process is under development, designed to serve between CAD (computer-aided design)/CAM (computer-aided manufacturing) packages of different file formats. In Indonesia, WG1 activities are being conducted with the assistance of Toyota Motor Corporation, and WG3 activities with the assistance of Wacoal Corporation, Japan. In Malaysia, designing, development, and tests are under way for prototype systems of an electronic catalog, direct link to CAD/CAM, transfer and sharing of electronic manufacturing data, etc., all to be completed by March 1999. In Singapore, an electronic parts library is compiled, and a verification test is conducted involving response time, download time, etc. In Thailand, development is under way of an engineering browser, automobile industry-oriented WEB-based information center, etc. (NEDO)

  3. Report for fiscal 1995 on simple operation type CAD/CAM system development through international cooperation. Research results; 1995 nendo 'kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Kenkyu seika

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This 5-year project beginning in FY 1994 is aimed at joint researches with various Asian countries for development of simply operable electronic designs and manufacturing support systems, which supports development of supporting industries (SI) for manufacturing industries in these countries. The project is being implemented in a total of 5 countries, China, Indonesia, Malaysia, Singapore and Thailand, in cooperation with the research institutes with which NEDO has concluded the basic contracts. The following three working groups are established to study construction of the model systems and design these systems for promotion of the joint project in each country; (1) automobiles and their parts, (2) home electric/electronic appliances, and their parts, and (3) textiles and apparels. The FY 1995 project results are described. The working group (1) covers definitions of the business models and conditions for systematizing these models for the demonstration tests. The working group (2) covers development of the electronic catalogues, electronic yellow pages/preproto types, and concurrent engineering. The working group (3) covers the SGML sewing technique specification systems, surveys and utilization tests for network infrastructures, international EDI systems for the textile industry, and translation systems for technical terms of the textile industry. (NEDO)

  4. Report on simple operation type CAD/CAM system development through international cooperation. Current statuses of Asian countries; 'Kan'i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku' ni kansuru hokokusho. Asia shokoku no jokyo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    Information systems, mainly aided by computers, are becoming increasingly important, contributing to development of wide areas of societies and economics, to begin with. However, few developing countries have established sufficient information systems, in spite of their strong desires to do so, which will further widen the gap between them and advanced countries, where these systems are acceleratedly advancing. Given these situations, Center of International Cooperation for Computerization (CICC) has been implementing various projects for providing assistance to and cooperation with oversea countries which are trying to develop information systems. This report summarizes the project, which CICC has been commissioned by NEDO as part of the cooperation programs, for manufacturing technology supported by advanced and integrated information system through international cooperation. It outlines the research cooperation memoranda NEDO has concluded with Indonesia, Malaysia, Singapore and Thailand, and the authorities of China, Indonesia, Malaysia, Singapore and Thailand. (NEDO)

  5. Study of solute incorporation into ice-layer on freeze concentration with ice-lining; Ice lining toketsu noshukuho ni okeru hyosho sochu eno yoshitsu torikomi ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yamazaki, Y.; Shinozaki, K. [Fujisawa Pharmaceutical Co. Ltd., Osaka (Japan); Hirata, Y. [Osaka University, Osaka (Japan)

    1997-07-10

    The mechanism of solute incorporation into an ice-layer in freeze concentration with ice-lining was studied by changing the impeller speed N and the difference between the brine temperature and the freezing point of the feed solution {Delta}T in 10 kg/m{sup 3} CCNa solution. The effect of N on the apparent partition coefficient of the solute K, is more serious than that of {Delta}T. The growth rate of the ice layer is 10{sup -7} - 10{sup -6}m/s under the condition of {Delta}T=2.8 - 7.9degC and N = 20-400 min{sup -1}. The growth rate had a little effect on solute incorporation into the ice-layer. K values depended on the surface condition of the ice layer, which is effected by the mixing speed of the impeller. The ice layer formed at low mixing speed has a complex rough shape, and has much solute because of adhesion to a large surface area. Therefore, it is recommended that freeze concentration is performed by making an ice layer with smooth surface at high mixing speed. 9 refs., 6 figs.

  6. Research on energy conservation in petrochemical and steelmaking industries in a developing country (India); Hatten tojokoku (Indo) ni okeru sekiyu kagaku kogyo tekkogyo no energy shohi koritsuka ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Current state of energy conservation in petrochemical and steelmaking industries in India was surveyed to estimate energy consumption and demand, and discuss possible international cooperation. Recently India has grown rapidly, and its growth rate of energy consumption is higher than a rise in GDP. In order to examine the current state of energy conservation in India, major energy consumption levels in India was surveyed together with production outputs of steelmaking, oil refining and petrochemical industries. Energy consumption and the potential of current energy-saving programs were also surveyed in modern factories. As a result, for energy conservation in petrochemical and steelmaking industries in India, the following were pointed out: improvement of operation conditions in current facilities, improvement of management systems in current facilities such as introduction of computers, and modification of production processes. Improvement of energy efficiency by introducing advanced technologies from developed countries such as Japan was essential. 37 figs., 45 tabs.

  7. Studies of initial stage in coal liquefaction. 4. Radical formation and structural change with thermal decomposition of coal; Ekika hanno no shoki katei ni kansuru kenkyu. 4. Netsubunkai ni tomonau radical seisei kyodo to kozo henka

    Energy Technology Data Exchange (ETDEWEB)

    Kanaji, M.; Kaneko, T.; Shimasaki, K. [Nippon Brown Coal Liquefaction Co. Ltd., Tokyo (Japan); Kumagai, H.; Chiba, T. [Hokkaido University, Sapporo (Japan). Center for Advanced Research of Energy Technology

    1996-10-28

    In relation to coal liquefaction reaction, the effect of the coexistence of transferable hydrogen (TH) from process solvent on reduction of radical concentration and the effect of pre-heat treatment on average structure of coals were studied. In experiment, change in radical concentration with temperature rise was measured using the system composed of Yallourn coal and process solvent. The results are as follows. Process solvent with a wide boiling point range of 180-420{degree}C is effective in suppressing an increase in radical concentration even at higher temperature. The effect of hydrogen-donating solvent increases with TH. It was also suggested that high-boiling point constituents in solvent stabilize radicals even over 400{degree}C by vapor phase hydrogenation. The experimental results of pre-heat treatment are as follows. Although the conversion improvement effect of TH is equivalent to that of the model solvent, TH tends to produce soluble products with smaller ring numbers. It was thus suggested that pre-heat treatment in process solvent is effective to inhibit retrogressive reactions. 6 refs., 5 figs., 1 tab.

  8. Study on heat collector of the solar system utilizing outdoor air. Experimental results in cases of cold and warm regions; Gaiki donyushiki solar system no shunetsubu ni kansuru kenkyu. Kanreichi to ondanchi ni okeru shunetsu jikken to kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Komano, S.; Ebara, Y. [OM Solar Association, Shizuoka (Japan); Wada, H. [Wada Building Constructors Co. Ltd., Hokkaido (Japan)

    1996-10-27

    An experiment on heat collection was made in the heat collector of a solar system utilizing outdoor air in cold and warm regions. In this system, outdoor air is heated by the air circulation layer on the roof exposed to solar radiation. The heated air is supplied to the object space for heating and ventilation. In the experiment in a cold region, the heat collection characteristics can be adjusted by putting a baffle plate in the air duct according to the experiment of a glass heat collector. The heat collecting air layer on only the iron roof may leak or freeze in the region subject to coldness or heavy snowfall. Therefore, preheat forms the space of a garret, and the preheat temperature comparatively becomes low. The data in which the heat collection characteristics can be adjusted using only a glass heat collector is required corresponding to the regional situation. In the experiment in a warm region, an experiment was made inclusive of the preheat for which outdoor air is absorbed at the eaves. As a result, the heat collection characteristics of preheat were improved. Moreover, a heat collection temperature of about 60{degree}C was obtained on the heat collection surface including the preheat. 1 ref., 12 figs., 3 tabs.

  9. Effect of heat generation from bone cement on bone tissue in total knee arthroplasty; Jinko kansetsu okikaeji no one cement no hatsunetsu ga seitai soshiki ni oyobosu eikyo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Matsuda, M.; Uchida, T. [Kobe University, Kobe (Japan); Iwatsubo, T. [Kobe University, Kobe (Japan). Faculty of Engineering; Kurosawa, M.; Hashimoto, Y. [Kobe University, Kobe (Japan). Faculty of Medicine; Fukushima, H.

    1998-01-25

    Bone cement is often applied to fix the components in a surgical operation, such as TKA (total knee arthroplasty). In this paper, we consider the effect of heat generation from bone cement on bone tissue in TKA by using numerical simulation. First, we applied an axisymmetric model of tibia to finite element method and analyzed heat generation of bone cement. To confirm the results of analysis by experiment, we measured the temperature determined by 6 points i.e., 2 points each in component-cement interface, cement and bone-cement interface. As a result, the temperature determined by analysis agrees with that determined by experiment. Next, we proposed the evaluation formula of the bone necrosis. We constructed a bone necrosis map from the simulation. From the map, we found that the bone necrosis region was about 2 mm from the bone-cement interface. In addition, the bone necrosis is severe at the base of the tibial component. 7 refs., 15 figs., 3 tabs.

  10. Risk communication about chemical substance. Case studies in communication under guidelines established by local autonomies and trend of information sources; Kagaku busshitsu ni kansuru risuku komyunikeshon. Jichitai seitei no shishin ni motozuku komyunikeshon jirei to johogen no doko

    Energy Technology Data Exchange (ETDEWEB)

    Yoshimi, H. [Kanagawa Environmental Research Center, Kanagawa (Japan)

    1995-01-10

    Actions and measures is left to local autonomies, to chemical substances that are in commercial markets and are out of national regulations for their emission and disposal, even though they have public concerns for environmental effects. Thus, a trend to establish guidelines to prevent pollution by those chemicals has been spreading among autonomies facing actions and measures to them. Present status and problems are explained, of the guideline establishment and communication between autonomies and citizens or business owners to promote their self-management according to guidelines. Further, recent trends are introduced, of information sources on chemical substances that serve as a base of the communication. Guidelines of some prefectures ask business owners to collect information on substances that they deal with and needs environmental attention, by a format mimicking to MSDS (Material Safety Data Sheet). On the other hands, other guidelines stipulate that prefectures should provide business owners with information in forms of data-book, off-line or on-line data-base to aid them to collect information. Some guidelines stipulate to settle agreements or to organize councils on environmental safety. 6 refs., 2 figs., 1 tab.

  11. Research on passive solar energy application in Bolivia. Part 2. Development of weather data for air conditioning load calculation; Bolivia ni okeru passive ho no riyo kanosei ni kansuru kenkyu. 2. Kukan fuka keisan`yo kiso data no sakusei

    Energy Technology Data Exchange (ETDEWEB)

    Ishizuka, O.; Kaihara, K.; Zhang, Q. [Kumamoto University, Kumamoto (Japan)

    1994-12-08

    To know the applicability of passive solar energy in Bolivia, weather data were prepared for the air conditioning load calculation. As a representative city in the plateau, foot and plain, El Alto, Cochabamba and Santa Cruz were selected, respectively. Based on the observation data in the airport`s weather stations, data were prepared on the atmospheric temperature, humidity, wind direction, wind velocity and cloudiness. Because there existed no data on the quantity of solar radiation, its daily integrated quantity was calculated by regression from the daily mean cloudiness recorded in the data which were collected in 1978 by the meteorological observatories belonging to both Ministry of Transport, and Ministry of Posts and Telecommunications. More adaptable than the linear regression formula, the quadratic one gave correlation coefficients convergent in the region from 0.5 to 0.9 in most of the months. The daily integrated quantity of solar radiation was then divided by Collares model into its time-by-time quantities, which were further divided by Udagawa method into both their direct component and diffused component. Though the summer cloudiness is high in both El Alto and Cochabamba, the quantity of solar radiation is larger than that of the winter, which is judged attributable to the high solar angle of elevation. The wind is strong in El Alto. 5 refs., 7 figs., 3 tabs.

  12. Seismic tomography inversion in the case that sources and receivers are distributed out of a 2-D plane; Shingen jushinten ga nijigen heimennai ni nai baai no danseiha tomography kaiseki ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

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

    1996-10-01

    In the case where sources and receivers are not distributed on a 2-D plane, seismic tomography inversion was studied. In tomography experiments, the existing wells are generally used. In such case, sources and receivers are frequently not distributed on a 2-D plane. The 2.5-D analysis method including 2-D structure and 3-D ray-tracing was thus developed. This method is featured by less memory necessary for ray-tracing calculation, and the same algorithm for velocity determination as 2-D analysis method. In previous methods, since analysis is generally carried out by projecting sources and receivers on a certain assumed 2-D plane, it can derive correct results in the case of constant velocity and straight ray, however, in the other case, it derives incorrect results. Application of 3-D tomography requires a large amount of memory, and falls into poor convergence because of various parameters. The 2.5-D analysis method can avoid these demerits. This analysis method was applied to the data obtained in Ogiri area, Kagoshima prefecture. 5 refs., 3 figs., 2 tabs.

  13. Research report of fiscal 1997. Survey on creation of high-efficiency renewable resources, and bioconversion technology; 1997 nendo chosa hokokusho. Kokoritsu saisei kano shigen no sosei narabi ni bioconversion gijutsu ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Survey was made on material production technology using creation technology of high-efficiency renewable resources (photosynthesis reaction of plants). Industrially usable plant resources in overseas countries and Japan were arranged, and plant resources unused for food were also surveyed. The present state of genetic engineering necessary for metabolic engineering of higher plants such as fit and high-expression technology of genes, plant cell cultivation, and control technology of plant cell multiplication is described, and elementary technologies required for future gene-recombined plants are predicted. Survey was also made on the trend of creation technology of industrial plants for fat and oil, biodegradable polyester, amino acid, cellulose, fiber (cotton) and forest wood. A patent list on plant biotechnology was prepared, and study on bioconversion of plant resources was also surveyed. Overseas R & D trends on conversion and effective use technologies of renewable bio- resources are reported, and process design and its profitability were evaluated through a case study. 414 refs., 87 figs., 55 tabs.

  14. Study on active control methods. Part 3. ; Absolute vibration control system'' by modern control theory. Active seishin gijutsu ni kansuru kenkyu. 3. ; Gendai seigyo wo mochiita zettai seishin ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Kageyama, M.; Nohata, A.; Teramura, A.; Yasui, Y.; Okada, H. (Obayashi Corp., Tokyo (Japan))

    1991-08-10

    The absolute vibration control method by advanced optimal regulator theory was studied in order to reduce the acceleration response of a base-isolated building by active control at the base to hold the building in absolute space. The optimal regulator theory is originally a control method based on the feedback control theory. In the present study, however, application of the feedforward control theory, which is indispensable to the absolute vibration control, was also investigated. The performance by using this control method, in which large conventional actuators were applied to an actual base-isolated building, was analytically compared with that by the classic control method used from the past. As a result, it was found that this control method had a better effect compared with the classic control method. It is considered that absolute vibration control by a generally-used type of large-sized actuator is possible even at the time of a major earthquake. 5 refs., 19 figs.

  15. Investigation on the dynamic response and strength of very long floating structures by beam modeling on an elastic foundation; Dansei shishojo no hari model ni yoru chodai futai kozo no doteki tawami kyodo tokusei ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Tsubogo, T.; Okada, H. [University of Osaka Prefecture, Osaka (Japan). Faculty of Engineering

    1997-08-01

    A very large floating structure was replaced with the beam on an elastic foundation to examine the response characteristics in waves. Another evidence was regularly and numerically given for the basic characteristics of a very large floating body Suzuki found. New information was also obtained. The frequency response is mainly classified into a wave number control area and proper frequency control area when buoyancy elasticity exists. When the buoyancy structure is long and flexible, the proper frequency becomes continuous and the frequency control area becomes a resonance area. In the wave number control area, the Suzuki`s characteristic wave number becomes a control parameter, and various characteristic values are indicated by characteristic wave numbers. The response in the wave number control area becomes quasi-static when the distribution mass of buoyancy is fully small. The design in which the distribution mass of buoyancy is fully large must be avoided. In the displacement amplitude, the mass on the free end is severest. The proper frequency of vertical vibration relatively moves to the high-frequency side when buoyancy is considered as an elastic foundation. Attention must be thus paid to the proper frequency of vibration on the horizontal surface. 9 refs., 12 figs., 3 tabs.

  16. Research and survey report of FY 1997 on the CO2 balance for high-temperature CO2 fixation and utilization technology; 1997 nendo chosa hokokusho (nisanka tanso koon bunri gijutsu ni okeru CO2 balance ni kansuru chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The purpose of this research is to clarify the application condition and effectiveness of high-temperature CO2 fixation and utilization technology. To evaluate the present process, it was compared with others, such as separation using a polymer membrane, physico-chemical absorption process, adsorption process, hydrogen contact reduction process, and biological fixation. The development trends of absorption, membrane, adsorption, and cryogenic separation were investigated. The questionnaire was carried out about the separation technologies which are in the stage of performance test using actual gas, to arrange and compare the data and information. The current trends of chemical and biological CO2 fixation and utilization technology were also investigated for arranging the subjects. High-temperature CO2 disposal by the carbonation in concrete waste has been studied, to clarify its application conditions and effectiveness. In order to compare the separation technologies, treatment processes of CO2 in the exhaust gas from boilers of LNG power generation and coal fired power generation were simulated. These processes were simulated by ASPEN PLUS for the modeling. Trends of application of ASPEN PLUS and collection of information were surveyed by participating in the ASPEN WORLD. 103 refs., 51 figs., 55 tabs.

  17. Study of a fuel injection quantity sensor in diesel engine. Part 3. Experimental evaluation of the improved type micro turbine sensor; Diesel kikan ni okeru nenryo funsharyo sensor no kenkyu. 3. Funsharyo keisoku no seido kojo ni kansuru jikken hyoka

    Energy Technology Data Exchange (ETDEWEB)

    Maehara, H.; Iwasaki, T.; Kobayashi, T. [Zexel Corp., Tokyo (Japan)

    1997-10-01

    A Micro Turbine Sensor has been developed to measure fuel injection quantity and injection rate. Previous reports described results of experiments on the MTS which were carried out under steady and unsteady flow conditions. The MTS has been improved in shape of a holder tip and a detecting procedure for rotating speed of a turbine. As a result revolution speed of the turbine increased 18% over the conventional type holder under steady flow condition. Furthermore the measurement resolution of the MTS came up to about 2(mm{sup 3}/pulse) at 20(mm{sup 3}/stroke) under intermittent spray conditions using fuel injection pump. 11 refs., 11 figs., 1 tab.

  18. Study of the oil flow and the bearing temperature in engine. Part 3. Influence of the bearing designs; Engine ni okeru jikuuke yuryo oyobi jikuuke ondo ni kansuru ichikosatsu. 3. Jikuuke sekkei yoso no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, K.; Kawai, K.; Sasaki, S. [Taiho Kogyo Co. Ltd., Aichi (Japan)

    1997-10-01

    It is necessary to find the bearing design so that the bearing temperature drops most efficiently by making the proper oil flow. We measured the oil flow and the bearing temperature using the narrow width bearing the bearing with small oil relief , the bearing with shallow circumferential microgrooves (the microgrooved bearing), the narrow width bearing with microgrooves. And further, we measured the variation of the oil flow every 5-15deg crank angle and searched for the efficient oil flow. As the result the bearing temperature using the microgrooved bearing dropped most efficiently. 3 refs., 13 figs., 5 tabs.

  19. Evaluation of seismic capacity of wall columns in high-rise reinforced concrete frame structures. Kosohekishiki ramen tekkin concretezukuri tatemono ni okeru hekichu no taishin seino hyoka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Hiraishi, H.; Goto, T. (Building Research Inst., Tokyo (Japan)); Inai, E. (Hazama Corp., Tokyo (Japan). Technical Research Inst.); Imai, H. (Tsukuba Univ., Tsukuba (Japan)); Kano, Y. (Meiji Univ., Tokyo (Japan). Faculty of Engineering)

    1992-09-30

    So-called 'high-rise reinforced concrete frame structures (HFM) research and development project' was carried forward from 1985 to 1988. Based on the result of tests for columns carried out by the 'wall column WG' which is one of the working groups (WG), overall study is carried out on seismic capacity of wall columns provided in HFW beam direction. The items in the study are rigidity, various types of crack strength, and deformation capacity which are important for learning the seismic capacity of wall columns in the beam direction. The initial rigidity of wall columns can be estimated by the existing calculating method. The bending crack strength, bending shear crack strength, and shear crack strength of wall columns can be estimated by the existing equations. The bending strength of wall columns can be effectively estimated by the bending strength calculating expressions for earthquake-resisting walls given in this report. A design chart for the ranks of deformation capacity of wall columns is proposed. 20 refs., 21 figs., 2 tabs.

  20. Adaptive remeshing scheme for the FE analysis of shape rolling processes; Keiko atsuen FEM kaiseki ni taisuru tekiogata jido yoso seisei shuho (keiko atsuen han`yo kaiseki system no jidoka koseidoka ni kansuru kenkyu). Ki

    Energy Technology Data Exchange (ETDEWEB)

    Yanagimoto, J. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science; Kubota, H. [Toshiba Corp., Tokyo (Japan)

    1997-09-01

    This paper proposes an adaptive remeshing scheme for shape rolling. In generating elements adequately and automatically in the `C` cross section (longitudinal cross section) surface used for analyzing the shape rolling, considerations are required on geometrical characteristics of the bore shapes and geometrical characteristics of material cross sectional shapes. A large number of elements must be applied to portions with large bore curvature and portions where filling of bores with the material may occur. In addition, considering the plastic flow in the `C` cross section occurring in the pass can result in an analysis without accuracy deterioration upon minimizing the number of division of elements in the `C` cross section. This paper explains methods for determining the zone division on the outer surface and the number of nodes to be generated in each zone, and for arranging surface elements. Improving the analysis accuracy requires automatic generation of elements by estimating complex plastic flow deformation in the `C` cross section of a material to be processed, which may be sufficed by deformation estimation by means of an experimental expression or a simplified expression. A description is given particularly on application of the simplified deformation estimating expression for H-steels. Good solution was derived with use of fewer number of elements and shorter time. 4 refs., 6 figs., 1 tab.

  1. Improvement of power system stability of an adjustable-speed pumped-storage generator/motor. Denryoku keito ni okeru kahensoku yosui hatsuden dendoki no keito anteido kojo ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Michigami, T. (Tokyo Electric Power Co., Inc. (Japan)); Koyanagi, K. (Toshiba Corp., Tokyo (Japan))

    1994-02-20

    Recently, adjustable-speed pumped-storage generator/motor (adjustable-speed machine) is applied to power system as AFC adjusting force. This adjustable-speed machine has no problem on its stability and AC excitation control is carried out by the cycloconverter with speedy response since its being different from the conventional fixed-speed synchronous machine that the rotor speed becomes to adjustable. In this paper, aiming at the improvement of power system stability by using said adjustable-speed machine, the basic consideration on the rotor speed and reactive power control by AC excitation of the adjustable-speed machine; theoretical examination on the analysis model for analysing the system stability; analysis simulation results using two machine-pair infinite system for obtaining the basic properties of the improvement of power system stability; verification results on the effectiveness of improvement of power system stability as well as analysis model by simulative power transmission test are described. Further, the analysis simulation results on the effectiveness of improvement of power system stability by the models with the scale of practical system are reported. 11 refs., 15 figs., 9 tabs.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    1997-10-01

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

  3. Fiscal 1999 research result report. Research on improvement of boiling heat transfer characteristics by photocatalyst wall; 1999 nendo hikari shokubai hekimen ni yoru futto netsu dentatsu tokusei kaizen ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Research was made on improvement of the wettability and boiling heat transfer characteristics of a photocatalyst wall. Measurement experiment of the wettability was made for anatase type titan oxide-coated Al, SUS and Pb plates, rutil type titan oxide-flame coated SUS plate, raw plate, and oxide-plasma coated titan plate. In the ground experiment, the contact angles of distilled water and oil on specimen surfaces were measured. In the microgravity experiment, falling droplet images were recorded by using the facility of Japan Microgravity Center (JAMIC). For obtaining the effect of radioactive emission, UV irradiation, {gamma} ray and neutron beam irradiation by nuclear reactor, and {gamma} ray irradiation by Co-60 were carried out. As the experiment result, the rutil type titan oxide-flame coated SUS plate, nonconductor-coated titan plate, and zircaloy plate showed large improvement of the wettability by {gamma} ray irradiation with Co-60. It was also confirmed that in particular, titan shows the large effect of radioactive emission, and the wettability deteriorates rapidly after {gamma} ray irradiation. (NEDO)

  4. Research report of FY 1997 on the influence of insulation materials on global warming; 1997 nendo jigyo hokokusho (chikyu ondanka ni taisuru dannetsuzai no oyobosu eikyo ni kansuru chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This report describes the influence of insulation materials on global warming. In this study, extrusion polystyrene foam and rigid foam urethane have been selected for review. These were reviewed with both discharge of foaming agent and CO2 reduction produced by energy conservation as a result of the application of insulation material to houses by assuming what conditions would be applied for future foaming agent and thermal insulation. Discharge of CO2 was also considered through manufacturing process of insulation materials. The result was used for judgment of applicability of foamed plastic type insulation materials from the global warming viewpoint. In this study, the influence of insulation materials on the global warming was calculated in each district through their life cycle. It was found that the extruded polystyrene foam second-b and rigid foam urethane are effective to reduce the global warming in Sapporo, Morioka and Sendai in case of a detached house, except a detached house located in the southern district where requires less heat load. In case of a multiple dwelling house, any insulation material reviewed in the study showed that they could reduce CO2 in all districts. 10 refs., 52 figs., 64 tabs.

  5. Model experiment on change of seismic properties of a fracture caused by injecting/draining water; Chusui/haisui ni yoru kison kiretsu no dansei denpa tokusei no henka ni kansuru model jikken

    Energy Technology Data Exchange (ETDEWEB)

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

    1997-05-27

    Effect of water injection/draining on elastic waves penetrating through cracks is examined by measuring elastic waves before, during, and after the injection/draining of water into/from cracks in presence in granite. Two blocks of rock, with their crack-containing surfaces in contact with each other, are placed in a vessel, and water injection/draining is done through a hole on a vessel bottom side so that water will penetrate into the cracks. When the blocks are dry, there is almost no contact between the cracks, and so no crack penetrating waves are observed. Crack penetrating waves are produced when water is injected, and the position of the receiver sensing the penetrating waves changes as the water level rises. When the water level is lowered from the high water level, the waveform changes again as the level changes. The change in waveform is not so remarkable, however, as that observed during water injection thanks to the water residual in the cracks. It is now inferred that crack investigation is more effective when it is carried out with water being injected into dry cracks. The difference produced between the dry state and wet state when water is injected into dry cracks is used to detect the presence of cracks in this experiment, and this may be applied also to the investigation of cracks in the shallow part of the ground. 4 refs., 11 figs.

  6. Research cooperation project in fiscal 1998. Summarized report on research cooperation for mine waste water treatment technology utilizing biomass; 1998 nendo kenkyu kyoryoku jigyo. Bio riyo ni yoru kohaisui shori gijutsu ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    A cooperative research project has been executed with the People's Republic of China on removing heavy metals from waste water in mines in China. For the site surveys, consultations with the concerned Chinese parties were repeated for the subjects of the project to carry out the project smoothly. The following subjects were put into implementation at Wushan Mine: technical guidance to local researchers, investigation on properties of the mine waste water, collection of information for building a pilot plant, the pilot plant installation, and guidance of the plant operation. Then, the conception design was performed on the mine waste water treatment facilities at Wushan Mine based on the data derived from the research operation of the pilot plant. Furthermore, in order to help the Chinese researchers, a handbook was prepared for investigation, test and facility design on waste water treatment facilities utilizing iron oxidizing bacteria. In addition, Chinese researchers were invited to Japan to perform site training. (NEDO)

  7. Fiscal 1996 survey of potential international cooperation for a long-term scenario on CO2 reduction; 1996 nendo CO2 sakugen ni kakawaru choki shinario ni kansuru kokusai kyoryoku kanosei chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For the purpose of working out a CO2 reduction scenario and a CO2 policy introduction scenario, a survey was conducted of comparisons between ten and several models which are world-known and models of the New Earth 21, potential international cooperation to be carried out in the future, etc. The survey included organizations which are developing CO2 policy evaluation models, survey reports made in the past, details of literature for the analysis and arrangement. From the result, details of the questionnaire survey and organizations to be surveyed were decided on for the questionnaire survey. Objects for the survey were 7 countries and 22 organizations, and survey items were places for information exchange, sending/receiving of researchers, exchange of input data, comparative calculation based on the common database, joint research work, economy, the carbon tax, impact, renewable energy, how to handle and think of the carbon isolation, etc. As a result of the survey, proposed were a workshop on CO2 reduction, a comparative study of simulation models, etc. 25 refs., 50 figs., 12 tabs.

  8. FY1998 report on a survey related to joint utilization of welfare device development data using an international network; 1998 nendo kokusai network ni yoru fukushi kiki kaihatsu data no kyodo riyo ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    A survey was made in relation with joint utilization of welfare device development data using an international network. Developing welfare devices requires data from ergonomic and medical systems, while the cope of the objects is wide, and the kinds are various. For proliferation of welfare devices, system compatibility evaluation including that on using environment is important, including living environments that are different by countries. The present survey has identified how data for aged, handicapped and help-needing persons are accumulated and utilized in research organizations in America and Europe for both of the ergonomic and medical areas. The survey also investigated major academic societies in overseas countries, and collected database and academic network information that support the advanced research and development. At the same time, investigations were also made on organizations and corporations who are moving forward the efficient data utilization. Welfare device and service information providing systems in Japan were investigated to compare them with the trends in other countries. Conceptions and methods were compiled to utilize data internationally and jointly. Database models for device development were considered, and a proposal was made on structuring a research and development supporting database, and the operation method thereof. (NEDO)

  9. Report on the investigational research on the influence and effect of the fiscal 1994 packaging regulations on the industrial activities; 1994 nendo hoso kisei ga sangyo katsudo ni ataeru koka ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    The paper studies a desirable way of developing recycling and simplification of the packaging materials and analyzes its effects on the industrial activities and the conditions for location of local industrial sites to make future proposals for the issue. The research and development of biodegradable plastics as new packaging materials have been advanced in general enterprises, some of which have already become products. This is a technology which attracts attention as one of the methods for solving the waste problem. The development of packaging technology which can cope with the packaging waste issue has been promoted. The methods are divided into shape changes to bags, cups, BIB (bag in box) and refill containers; material changes to paper, dechlorination and simple material; reuse of used paper, etc. Part of the methods is practically applied. The packaging method in Germany has an effect on the distribution in Japan. Recently the economic growth has been in the doldrums, and the waste problem has become conspicuous. In the movement for the global environmental preservation, another look is obliged to be taken at the packaging industry circle. 11 refs., 10 figs., 14 tabs.

  10. Fiscal 1993 investigational study of a model of international cooperation for an environmentally harmony type green technosystem; 1993 nendo Oshu ni okeru haikibutsu shori oyobi recycle no doko ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-03-01

    For the natural environment preservation, effective utilization of resources, and maintenance of the ecosystem, an international cooperation model was proposed for the environmental harmony type green technosystem. A comprehensive evaluating analysis of a green forest resource, etc. as the global resource, and an intensive extraction of subjects and needs was made. The analysis was conducted of technical possibility and abstract business development effects toward the industrialization with high values added which is in harmony with the environment. As a case study, the Papua New Guinea area, Malaysia was selected and re-evaluated. For this typical tropical forest area, a new technical system was studied based on the natural environment, industry/economy, social/cultural assessment, etc., and a model for industrializing new international cooperation was proposed. For the model making for industrialization, various steps to be taken and conditions to be prepared were studied and arranged for the realization. Upon going ahead with the international technical cooperation, Japan, a large lumber consuming country, needs to always consider the fostering and effective use of lumber resource in particular. 27 refs., 28 figs., 30 tabs.

  11. Fiscal 1998 research report on the development trends of natural gas conversion technologies into liquefied fuel in Russia; 1998 nendo Roshia ni okeru tennen gas no ekitai nenryoka gijutsu no kaihatsu doko nado ni kansuru chosa kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Russia having natural gas resources largest in the world is actively promoting the basic research on liquefaction technology of natural gas such as Fischer-Tropsch (FT) synthetic catalyst, and its research potential is extremely high. This 3-year research project surveys the R and D trends of catalyst technology for liquefaction of natural gas, and fabricates the prototype FT synthetic catalyst based on the idea of Russian researchers to evaluate its feasibility experimentally. This report summarizes the following to clarify the research background: (1) The technology system for liquefaction of natural gas, and its future R and D trend, (2) The R and D trends of liquefaction technology of natural gas in the world, (3) The R and D trends of liquefaction technology of natural gas in Russia, (4) The research system of catalyses in Russia, (5) The activities of Russian catalysis research institutes, (6) The fuel liquefaction technologies of Russian major research institutes, and (7) The proposals from Russian research institutes. (NEDO)

  12. On dynamic response analysis of base-isolated structures for the Northridge earthquake and the Hyogo-ken Nanbu earthquake; Chokka jishin ni taisuru nenshin kozo no oto kyodo ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Takayama, M.; Morita, K. [Fukuoka University, Fukuoka (Japan). Faculty of Engineering

    1995-09-01

    The January 17, 1995, Hyogo-ken Nanbu earthquake was occurred. This earthquake was the most damaging earthquake to have struck Japan since the great Kanto earthquake. In Los Angela area, the Northridge earthquake was occurred at January 17, 1994. In this earthquake, the large acceleration over 1G was observed. Two base-isolated buildings (computer center and research facility) in Kobe-city, and USC Hospice (base-isolated building) in Los Angeles survived these big earthquakes. In this paper, the observed response of these base-isolated buildings was introduced and the performance of base-isolated buildings was discussed. And the dynamic response analysis was carried out using the observed ground motions during the two big earthquakes. As the results, the acceleration response of base-isolated buildings which isolated period Tf is over 4 sec was below 0.1-0.2G, and the relative displacement of isolated story was under 30-50cm. 13 figs., 4 tabs.

  13. Experimental studies on bearing strength of concrete footings at exposed type of steel column bases. Tekkotsu kozo roshutsu keishiki chukyakubu ni okeru kiso concrete no shiatsu kyodo ni kansuru jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kutani, K.; Masuda, K. (University of Kyushu Sangyo, Fukuoka (Japan). Faculty of Engineering)

    1991-09-30

    Concerning concrete footings at exposed type of steel column bases, centrally applied compressive load tests and lateral load tests under constant axial compressive forces were carried out. The results of these tests presented an empirical formula for bearing strength of concrete footings at exposed type of steel column bases taking account of the flexural strength and rigidity of base plates and the height of footings. The ultimate bending strength of footings could be obtained by using bearing strength of the empirical formula, assuming the distribution of the bearing stress as a second degree parabola, and regarding it as a plain concrete column whose cross section is the effective area of base plates. When the distribution of the bearing stress was assumed to be a rectangle, the experimental strength tended to be estimated to be at a little dangerous side by axial forces over {1/2} of the maximum compressive strength. Consequently, it was verified that correlation between ultimate bending moment of concrete footings and axial forces can be predicted by using the empirical formula of bearing strength unber centrally applied compressive load. 13 refs., 17 figs., 6 tabs.

  14. Study on construction of temporary dwellings and problems caused by living long time on Hanshin-Awaji Great Earthquake; Hanshin / Awaji daishinsai ni okeru okyu kasetsu jutaku no secchi to chokikan shiyo suru baai no kadai ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, K.; Nakamura, Y. [Nagasaki Univ. (Japan)] Shimizu, Y. [Kumagai Gumi Co. Ltd., Tokyo (Japan)

    1998-10-20

    Two years after the above-titled earthquake, an examination was performed on inhabitants in the temporary dwelling houses in Kobe, center of the calamity, and problems caused by a long stay there were clarified together with a grasp of the evolving problems by comparing the result of survey carried out immediately after the disaster. The number of such temporary dwelling houses amounted to 29,128 within Kobe City and 3,168 outside of the city. According to the room arrangement, they were either one f 4 types : 2-rooms with a kitchen, 1 room with a kitchen, dormitory and those specifically for aged persons. There were 59,449 applications at the first offer of 2,702 houses. The priority of their assignments and so on are explained. As for the housing structure, numerous complaints concerned with the room temperature, noise and so forth. As for the living environment, lack of nearby commodity shop, omission of transportation access, ill drainage of the housing sites were pointed out and the matters of demand to the local authorities included the installation of mail post and street lights. As for the health management, insomnia, stiff shoulder, lumbago and other bad physical conditions were revealed. The financial difficulty and the high house rent were obstacles to migrate to other places. The prolonged temporary lives worsened the apprehension of dwellers for the earthquake, typhoon, fire and alike. Some features for the calamity are described in comparison with the result of survey on those who were compelled to live under similar conditions by the eruption of Mr. Fugen. 6 refs., 13 figs., 15 tabs.

  15. Preliminary research on the activities implemented jointly (AIJ) workshop. Present AIJ in China; Kyodo jisshi katsudo workshop ni kansuru jizen chosa. Chugoku ni okeru kyodo jisshi katsudo no genjo

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    In order to positively promote the activities implemented jointly (AIJ) of the United Nations Framework Convention on Climate Change, the AIJ workshop acting in contact with Asia/Pacific countries, in particular, Chine having large effect on global environmental pollution was researched preliminarily. AIJ approved in the convention is the effective means to promote measures against global warming cost-effectively by optimally combining every developed country`s technology, know-how and fund. Distribution of the credit for greenhouse gas emission reduction by AIJ is unsolved because of the disagreement of views between developed and developing countries. The pilot phase of AIJ projects is carried out by voluntary workers jointly with developing countries until establishment of international rules. In fiscal 1995, the following were studied: the framework necessary for AIJ between Japan and China, the organization for promoting concrete AIJ projects, and the means to create the reliance of China for AIJ projects. 6 refs., 10 figs.

  16. FY 1997 report on the modification of dental materials with Ag for improvement of antibacterial activity; 1997 nendo chosa hokokusho (gin ion ni yoru shikayo zairyo no kokinsei fuyo ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Improvement of an antibacterial activity is one of the issues in modification of artificial teeth for an aged society. Study was made on improvement technique of an antibacterial activity with Ag ion as secondary corrosion measures. Partial gaps of dental materials themselves and gaps between materials and peripheral tissues causes bad breath or bad teeth through propagation of disease germs. Ag ion is harmless and has an antibacterial activity for bio-tissues from a macro-viewpoint, however, only corrosion germ causing bad teeth in mouths should be sterilized by controlling an elution rate of Ag properly. The antibacterial activity was controlled by controlling Ag ion implantation depth and rate, and Ag elution rate for dental materials. Experiment was made on an IMZ twinplus specimen implanted with Ag ion and an Ag thin film-coated specimen using beagle dog in comparison with an unmodified specimen. As a result, the very favorable antibacterial activity was obtained. Ag ion is effective for prevention of endogenous infectious disease due to mouth germs in dental surgery. 3 refs., 47 figs., 10 tabs.

  17. Study on the heating and cooling pattern and heating and cooling period in residential buildings on the basis of national scale surveys; Zenkokuteki chosa ni motozuku jutaku no danreibo jikan oyobi danreibo kikan ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Bogaki, K.; Sawachi, T. [Ministry of Construction, Tokyo (Japan); Yoshino, H. [Tohoku Univ., Sendai (Japan)] Suzuki, K. [Hokkaido Inst. of Tech., Hokkaido (Japan)] Akabayashi, S. [Niigata Univ. (Japan)] Inoue, T. [Science Univ. of Tokyo (Japan)] Ono, H. [Sugiyama Women`s Senior Coll., Nagoya (Japan)] Matsubara, N. [Kyoto Prefectural Univ. (Japan)] Hayashi, T. [Kyushu Univ., Fukuoka (Japan)] Morita, D. [Ryukyu Univ., Naha (Japan)

    1998-07-30

    Energy consumption in summer and winter, life style and environment consciousness were surveyed by questionnaire in eight city areas; heating and cooling patterns and heating and cooling periods are clarified by areas, and regional characteristics and differences according to the residential structure and locations are examined. Regional differences in operating hours of the cooler are relatively small while regional differences in operating hours of the heater are large as is shown by about 3 times difference between the longest Sapporo and the shortest Naha. The heating and cooling patterns are intermittent except for Sapporo in winter. As to the relation between the startup temperature and outdoor temperature, the outdoor temperature at 50% occupancy of the cooler showed regional differences; the outdoor temperature at 50% occupancy of the heater was about 10degC except for Naha. The pattern of the cooler occupancy showed two peaks in a day except for Naha. Possibility of correlation between the outdoor temperature at initiation and termination of the cooler operation and minimum death rate due to cerebrovascular disease was indicated. 12 refs., 11 figs., 3 tabs.

  18. OpenNI cookbook

    CERN Document Server

    Falahati, Soroush

    2013-01-01

    This is a Cookbook with plenty of practical recipes enriched with explained code and relevant screenshots to ease your learning curve. If you are a beginner or a professional in NIUI and want to write serious applications or games, then this book is for you. Even OpenNI 1 and OpenNI 1.x programmers who want to move to new versions of OpenNI can use this book as a starting point. This book uses C++ as the primary language but there are some examples in C# and Java too, so you need to have about a basic working knowledge of C or C++ for most cases.

  19. ANTIČNI ATOMIZEM

    OpenAIRE

    Žnidaršič, Miran

    2014-01-01

    Antični filozofi Levkip, Demokrit, Epikur in Lukrecij so razvili filozofijo atomizma, ki postavlja za osnovo vsega neštete nedeljive in nezaznavne delce. Ti delci ali atomi zadevajo eden ob drugega, se odbijajo in zapletajo v neskončni praznini ter na ta način tvorijo zaznavna telesa. Ker lahko vse, tudi dušo, zreduciramo na atome, ti pa so najmanjši delci materije, veljajo atomisti za prve materialiste. Gibanje pa je posledica medsebojnega delovanja atomov, zato je njihov nazor mehanistični....

  20. Fiscal 2000 research and development of technologies for intelligent infrastructure creation and utilization. Research and development of reference materials relating to endocrine disrupting chemicals (Studies of storage stability, methods of implantation, etc., for pure substance standard, mixed substance standard, and composition type standard); 2000 nendo chiteki kiban sose riyo gijutsu kenkyu kaihatsu. Naibunpi kakuran kagaku busshitsu kanren hyojun busshitsu no kenkyu kaihatsu (Jun busshitsu hyojun, kongo hyojun oyobi soseigata hyojun busshitsu ni kakawaru hozon anteisei, netsuke hoho nado)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Environmental pollution by endocrine disrupters is a formidable threat to environmental safety because it involves the basic living circumstances of organisms and will stay dangerous through the generations. Disrupting chemicals found firstly in polymeric materials are also detected in aqueous beings' living environments such as water and river bottom. In this fiscal year, out of reference materials deemed to be necessary for the measurement of endocrine disrupters, butylbenzyl phthalate, 4-t-butylphenol, 4-n-heptylphenol, and 4-t-octylphenol were taken up for the determination of reference material purity, establishment of methods for preparing standard solutions, establishment of methods for determining standard solution concentration, and the evaluation of standard solution storage stability. Moreover, a method for determining concentration was established and storage stability was evaluated for a mixed standard liquid which was a mixture of the 4 phtalate esters. As the result, a standard solution accurate in concentration and excellent in storage stability was developed. (NEDO)

  1. Ni landsbyer i Danmark

    DEFF Research Database (Denmark)

    Larsen, Jacob Norvig

    Denne rapport beskriver en evaluering af statsstøttede forsøg med at styrke og udvikle mindre lokalsamfund. Forsøgene er gennemført i ni kommuner. Da der i disse år er stor opmærksomhed om de små byers og samfunds udviklingsmuligheder, har erfaringerne fra forsøgsprojekterne bred interesse...

  2. Frenkel defects in Ni and Ni-base alloys

    International Nuclear Information System (INIS)

    The defect structure produced by low temperature (4K) electron irradiation in single crystals of Ni, Ni62Cu38 and Ni3 Fe was investigated by measurements of the diffuse scattering of X-rays (Huang Diffuse Scattering), the change of the lattice parameter and the change of the electrical resistivity: The volume relaxation and the structure of the self interstitial atom (SIA) is very similar for the alloys and the pure fcc metals. The interstitial clustering processes during stage I and II proceed progressively more slowly in Cu, Ni, NiCu and Ni3Fe respectively. In Ni3Fe even the di-interstitial seems immobile up to stage III. The formation of large vacancy agglomerates during stage III annealing is only observed with the pure metals Ni and Cu. Interstitial mobility during annealing in stage II contributes to the decomposition of NiCu but not to the ordering of Ni3Fe. There is an increase of order for highly ordered Ni3Fe (S = 0.7) during annealing in stage III and, within the errors, no change for samples with S = 0. (author)

  3. Room temperature ferromagnetism of Ni, (Ni, Li), (Ni, N)-doped ZnO thin films

    Institute of Scientific and Technical Information of China (English)

    AU; ChakTong

    2010-01-01

    Ni-doped ZnO thin films (Ni concentration up to 10 mol%) were generated on Si (100) substrates by a sol-gel technique. The films showed wurtzite structure and no other phase was found. The chemical state of Ni was found to be bivalent by X-ray photoelectron spectroscopy. The results of magnetic measurements at room temperature indicated that the films were ferromagnetic, and magnetic moment decreased with rise of Ni concentration. The magnetization of Ni (10 mol%)-doped ZnO film annealed in nitrogen was lower than that annealed in argon, suggesting that the density of defects had an effect on ferromagnetism.

  4. Coupled simulation of CFD, radiation and moisture transport for sensible and latent heat loss from human body. Study of computational thermal manikin; Jinko hifu zennetsu honetsu tokusei ni kansuru CFD hosha shikke yuso rensei kaiseki. Suchi thermal manikin no kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    Zeng, J.; Kato, S.; Murakami, S. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science

    1998-01-01

    Described herein is coupled simulation of CFD, radiation and moisture transport, as part of the program for development of computational thermal manikin, to investigate total heat radiation characteristics from a human body. The transport phenomena are investigated for a single human body model, approximately 1.65m high, in an indoor space of 15.4m{sup 3} in volume, where the Fanger model and Gagge`s 2 node model are used to simulate heat radiation from a model. The results include heat balances on the walls, and temperature distributions, heat transport characteristics by convection and radiation, latent heat transport characteristics and wet fraction distributions over the manikin surfaces under given conditions of wind velocity, temperature and temperature distribution. It is found that both models give proper estimates for average characteristics of total heat radiation from a human body, and that the Gagge model gives slightly better results for local distributions of latent heat transfer over the body surface. 16 refs., 27 figs., 1 tab.

  5. Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku

    Energy Technology Data Exchange (ETDEWEB)

    Maeda, H.; Miyajima, S. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science; Masuda, K.; Ikoma, T. [Nihon University, Tokyo (Japan). College of Science and Technology

    1996-12-31

    Steady-state drift force in regular waves is theoretically analyzed. It is also studied under combined external force experimentally using a two-dimensional water tank. The fluid forces are analyzed by the pressure distribution method based on the potential theory, in which the effects of water depth are taken into account to discuss the effects of elastic deformation of the floating structure on the drift characteristics of steady-state waves. The tests were carried out using a wave-making circulating water tank equipped with a wind duct to create wind, waves and tidal flow. Drift force under a combined external force by wind, wave and/or tidal flow cannot be accurately predicted by arithmetically adding these components. For predicting drift force by tidal flow, it is necessary to take into account drag force in current at the floating structure bottom as well as that in wind at the front face. Drift force by tidal flow is affected by shallowness of water, which should be taken into account for drag forces. The floating structure will be deformed along the wave face as its stiffness decreases, basically decreasing steady-state drift force. 9 refs., 14 figs.

  6. Studies of initial stage in coal liquefaction. Effect of decomposition of oxygen-functional groups on coal liquefaction; Ekika hanno no shoki katei ni kansuru kenkyu. 3. Gansanso kannoki no bunkai kyodo to ekika hanno eno eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Komeiji, A.; Kaneko, T.; Shimazaki, K. [Nippon Brown Coal Liquefaction Co. Ltd., Tokyo (Japan)

    1996-10-28

    Pretreatment of brown coal in oil was conducted using 1-methyl naphthalene or mixture of tetralin and 1-methyl naphthalene as solvent at temperatures ranging from 300 to 430{degree}C under nitrogen atmosphere. Effects of the solvent properties on the structural change of oxygen-functional groups (OFG) and coal liquefaction were investigated by means of quantitative analysis of OFG and solid state {sup 13}C-NMR measurement. When hydrogen transfer from solvent was insufficient, it was suggested that brown coal molecules loose their hydrogen to be aromatized. While, at lower temperatures ranging from 300 to 350{degree}C, hydrogen contained in brown coal molecules was consumed for the stabilization of pyrolytic radicals, and the deterioration of liquefaction was not observed. When hydrogen transfer from solvent was insufficient at higher temperatures above 400{degree}C in nitrogen atmosphere during pretreatment in oil, crosslinking like benzofuran type was formed by dehydration condensation of hydroxyl group in brown coal, to deteriorate the liquefaction, remarkably. The addition of donor solvent like tetralin decreased the formation of crosslinking like benzofuran type, which suppressed the deterioration of liquefaction. 8 refs., 5 figs.

  7. Studies of initial stage in coal liquefaction. Effect of prethermal treatment condition with process solvent to increase oil yields; Ekika hanno no shoki katei ni kansuru kenkyu. Sekitan no maeshori joken to yozai koka

    Energy Technology Data Exchange (ETDEWEB)

    Shindo, T.; Komatsu, N.; Kishimoto, M.; Okui, T.; Kaneko, T.; Shimasaki, K. [Nippon Brown Coal Liquefaction Co. ltd., Tokyo (Japan)

    1996-10-28

    Process solvent was hydrogenated in the brown coal liquefaction, to investigate the influence of it on the prethermal treatment and liquefaction. Consequently, it was found that the n-hexane soluble (HS) yield was improved. In this study, capacity of hydrogen transfer from solvent during prethermal treatment and effects of catalyst were investigated. Since prethermal treatment in oil was effective for improving the oil yield in the presence of hydrogen/catalyst or high hydrogen-donor solvent, influence of hydrogen-donor performance of solvent or addition of catalyst on the hydrogenation behavior of coal and the characteristics of products during prethermal treatment were investigated in relation to successive liquefaction results. As a result, it was found that the increase of HS yield was due to the acceleration of conversion of THF-insoluble using high hydrogen-donor solvent and/or by adding catalyst. It was also found that the use of high hydrogen-donor solvent and highly active catalyst at the stage of prethermal treatment before the successive liquefaction was effective for improving the HS yield, i.e., liquefied oil yield. 2 refs., 5 figs., 1 tab.

  8. FY 1996 result report. Research/development on the creation of high-grade combustion technology using a microgravity environment; 1996 nendo seika hokokusho. Bisho juryoku kankyo wo riyoshita kodo nensho gijutsu soshutsu ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    With the aim of creating high-grade combustion technology which can respond to the decrease in environmental pollutant in combustion exhaust gas, the high-grade combustion technology research development committee was established inside JSUP (Japan Space Utilization Promotion Center), using the underground gravity-free test center. Following FY 1995, the following were conducted: (1) international joint research with NASA, and (2) tests using microgravity test facilities, etc. and analysis/evaluation of the test data. As to the international joint research, a lot of new information was obtained through the adjustment conference with NASA. Further, there were a lot of results obtained from joint tests and researches. Moreover, the leading experimental device and measuring device which are usable in the microgravity field were developed/prepared. Conducted were combustion/evaporation evaluation experiments on fuel droplet and groups of droplet, combustion characteristics elucidation evaluation experiments on high-density fuels, evaluation experiment on flammability limits, and elucidation evaluation experiments on emission mechanism of NOx, etc. Through those, abundant experimental data were able to be accumulated, and a lot of precious knowledge/information were obtained. Besides, the fabrication of high-class combustor test equipment for ground demonstration was started. (NEDO)

  9. Fiscal 1998 research report. R and D on advanced combustion technology under microgravity environment; 1998 nendo seika hokokusho. Bisho juryoku kankyo wo riyoshita kodo nensho gijutsu soshutsu ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Research was made on explication of a combustion phenomenon by using a microgravity facility, and a combustor possible to realize advanced combustion technology. In the basic research composed of 5 themes by the international joint research with NASA, 52 drop experiments using JAMIC's facility and 100 drop experiments using NASA's 2.2s drop tower were carried out. The themes are composed of an interaction in droplet arrays combustion, combustion of binary fuel sprays, combustion characteristics of solid fuel, flame dynamics around a lean flammability limit, and mass transfer around a combustion field. In the experiment using the microgravity experiment facility and analysis evaluation of the experimental data, studies were made on combustion and evaporation of fuel droplets, combustion characteristics of dense fuel, flammability limit, formation mechanism of NO{sub x} and an advanced combustor. For applying a pre-evaporating/pre- mixing combustion system to a combustor for aircraft engines, studies were made on some issues such as improvement of a combustion stability, NO{sub x} discharge characteristics, and optimum fuel atomizing. (NEDO)

  10. Interim report on the research development of high combustion technology using the microgravity environment; Bisho juryoku kankyo wo riyoshita kodo nensho gijutsu soshutsu ni kansuru kenkyu kaihatsu chukan hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    There are problems on diversification of energy from a viewpoint of energy stabilized supply and reduction of environmental pollutant in fuel exhaust gas. For the solution, combustion phenomena are elucidated using microgravity equipment, and a combustor which enables high combustion technology is studied. For it, a field survey is conducted on implementation of international joint research with the U.S.` NASA, and at the same time experiments and analyses of the experimental data are carried out using microgravity experimental equipment. For experiments using microgravity experimental equipment and analysis/evaluation of experimental data, the following were conducted: (1) evaluation of combustion properties of various fuels, (2) fabrication of equipment needed for experiments for analysis/evaluation of combustion parameters, and combustion/evaporation evaluation experiments of fuel droplet/droplet group using microgravity experimental equipment, evaluation experiment to elucidate combustion property of solid particle mixed fuel, evaluation experiment of combustion limit, etc. In fiscal 1993, experimental data are being acquired for establishing a target experimental method. 42 refs., 151 figs., 1 tab.

  11. Fiscal 1993-1998 integrated research report. R and D on advanced combustion technology under microgravity environment; 1993 - 1998 nendo sogo seika hokokusho. Bisho juryoku kankyo wo riyoshita kodo nensho gijutsu soshutsu ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    For developing advanced combustion technology by using JAMIC's facility, the advanced combustion technology research committee supported by researchers of universities, national institutes and industries was prepared in JSUP, and R and D using a microgravity experiment facility and the international joint research with NASA were carried out. By using the advanced experimental equipment and measuring instrument developed for microgravity experiments, studies were made on combustion and evaporation of fuel droplets, combustion characteristics of dense fuel, flammability limit and NO{sub x} generation mechanism, and such precious results were obtained as storage of abundant experimental data, explication of a combustion mechanism, preparation of a database and find of new phenomena. In the ground verification experiment using the newly fabricated advanced combustor test equipment, various data effective for developing high-efficiency low-pollution combustors were obtained. Through the joint research with NASA including 5 themes, various results and the real relationship between the researchers were also obtained. (NEDO)

  12. Studies on marine ecosystem in particular emphasis on phytoplankton (lecture by the member awarded the oceanographic society of Japan prize for 1992). Shokubutsu plankton wo chushintoshita kaiyo seitaikei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Takahashi, M. (The University of Tokyo, Tokyo (Japan). Faculty of Science)

    1993-06-25

    This paper, while introducing major study results of the author, summarizes his studies on ecosystems in lakes and oceans with respect mainly to phytoplanktons. The studies include the following subjects: A proposal on mathematical model equations to estimate growth of photosynthetic bacterial populations in deep lake beds; evaluation of stimulative effects for photosynthetic production provided by fertilizer application in lakes, and influences of phytoplanktons on population structures; evaluation on effects imposed on ecosystems from dumping chemical substances, as observed in experimental ecosystems that incorporate part of marine ecosystems; correlation between red-tide life absorbing proliferation stimulating substances and red tide generation; growth of high-concentration phytoplankton populations containing algae as a dominant species in local upwelling environments in oceans; and verification on establishment of specific phytoplankton populations containing pico-phytoplankton as a dominant species in oligotrophic environments in open seas. The paper mentions influences of the author's book, Biological Oceanographic Processes under joint authorship with Parsons on marine ecosystem researchers. 66 refs., 8 figs.

  13. Study on the problems from recycling end of life vehicles in Japan and asia-pacific region; Seimyaku sangyo no kokusai tenkai ni kansuru kenkyu -Asia{center{underscore}dot}Taiheiyo chiiki shokoku no jidosha risaikuru wo daizai to shite

    Energy Technology Data Exchange (ETDEWEB)

    Togawa, Ken' ichi [Kyushu University, Fukuoka (Japan). Research Center For Coal Mining Materials

    1998-12-16

    The aim of my research is to develop an economic geography theory to explain the global automotive recycling industry. The most profitable aspect of the ELV (end-of life vehicles) dismantling business is the export of used Japanese auto parts to the countries in Asia and the Pacific region. In Japan there are about 5000 dismantlers with most of them being of small to medium size. In developed countries, the average recycling rate by vehicle weight is about 75% with the remainder, mostly shredded residue, ending up in landfills. This landfill residue contains many environmentally polluting materials. Available landfill sites are quickly becoming exhausted, especially after illegal shredder residue dumping incidents. However, a business chance was created by environmental regulation and we can now observe car makers, dealers, steel companies, and insurance companies joining the dismantling business. (author)

  14. Fiscal 1997 international cooperation project. Report on the results of the research on environmental harmony type combustion technology; 1997 nendo kokusai kenkyu kyoryoku jigyo. Kankyo chowagata nensho gijutsu ni kansuru kenkyu kaihatsu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Out of the R and D on the environmental harmony type combustion technology, the results of the project carried out in fiscal 1997 were summed up. In the site survey, etc., visits were paid to France, Spain, Greek, Germany, the U.K. and the U.S. to have discussions and examine the trend of research on the NOx removal catalyst and catalyst combustion. In the actual R and D, the R and D were conducted on zeolite base NOx removal catalyst, oxide composite base NOx removal catalyst, alumina base NOx removal catalyst, direct decomposition type NOx removal catalyst, catalyst combustion, etc. In the R and D of the catalyst combustion, durability under high gas flow flux was examined of PdO-Pt/Ba-Al203 catalyst developed for low temperature use, which indicated that durability and low temperature activity were heightened. As high temperature use catalyst, high temperature durability was examined of the developed Pd0-La/Gd-ZrO2 catalyst, which showed that the durability was favorable. 322 refs., 261 figs., 55 tabs.

  15. Experimental study of lightning protection effects to a overhead ground wire by a lightning rod and projection rods; Yuraishin oyobi dosshi wo mochiita kakuchisen no raigai boshi ni kansuru jikkenteki kento

    Energy Technology Data Exchange (ETDEWEB)

    Katsuragi, Y. [Chubu Electric Power Co. Inc., Nagoya (Japan); Aihara, Y. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1995-04-20

    The overhead ground wire is generally used on transmission lines as one of the lightning protection devices for the power conductors. In recent years, the ground wire with an optical fiber cable in it (OPGW) has been employed on the transmission systems. The strands of the ground wire are, however, frequently melted down because of lightning strokes to them not only in summer but also in winter. For this reason, it is necessary to devise the new lightning protection method for the ground wire. As the protection method, lightning rods installed on the transmission tower arms and projection rods wound around a ground wire are proposed by authors. Lightning protection effects of these methods are shown by model experiments which simulate summer and winter lightning strokes. It has been made clear that these methods are useful as one of the lightning protection methods for transmission lines, and application conditions of them for practical use are also shown. 4 refs., 12 figs., 2 tabs.

  16. Study of coherent optical fiber communication in electromagnetic field. 1. Fundamental experiment in magnetic field; Coherent hikari tsushin eno denjikai no eikyo to taisaku. 1. Jikai no eikyo ni kansuru kiso jikken

    Energy Technology Data Exchange (ETDEWEB)

    Kurono, M.; Isawa, K.; Kuribara, M. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1994-03-01

    Coherent optical fiber communication is an effective method to increase transmission capacity of the existing transmission route. However, it is necessary for this method to control the polarization state of optical signals. Composite fiber optic ground wire (OPGW) is a transmission route that is peculiar to electric power. It is considered that the optical polarization state through OPGW may fluctuate considerably due to the magnetic field generated by electric current. In this paper, it is predicted theoretically that the polarization fluctuation occurs due to the Faraday effect because the magnetic field is formed in the axial direction of the fiber by the spiral flow of electric current along the twisted strand around the fiber. In order to study the effects on the axial magnetic field, carried out is an experiment to add the axial magnetic field to the 10km drum-winding optical core wire through the toroidal coil. Both polarization rotation angle and ellipticity angle are changed up to 1.4 rad by the coil current of 10A. In the AC magnetic field, the bit error rate increases to 10{sup -2}, but it can be improved by the polarization diversity detector. 24 refs., 26 figs., 6 tabs.

  17. Considerations on thrust-to-input ratio of a cylindrical moving coil type linear DC motor; Entojo coil kadogata linear chokuryu motor no suiryoku/nyuryokuhi ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Mizuno, T.; Yajima, H.; Tang, Y.; Yamada, H. [Shinshu University, Nagano (Japan); Miyashita, T. [Sanyo Denki Co. Ltd., Tokyo (Japan); Yamamoto, H.; Shibuya, K. [Matsushita Refrigeration Co., Osaka (Japan)

    1998-04-01

    Linear DC motors (LDMs) are widely used for servo-actuator, compressor and so on. High-efficiency LDMs are strongly desired for compressors. To realize the LDMs with high-efficiency characteristics, decreasing the copper losses, namely, thrust-to-input ratio, F/P, must be increased. This paper describes an optimization method for the F/P of a moving coil type LDM. The following results are obtained: (1) Simplified expression for the F/P of the LDM is derived from the permeance analysis method. The effects that dimensions of the LDM influence the F/P of the LDM are investigated through the simplified expression for the F/P. As a result, the optimum dimension of the LDM for maximizing the F/P exists. (2) When the static thrust is 100 N, the measured F/P of the initial LDM is 7.9 N/W, and the errors by using the simplified expression for the F/P and the finite element method (FEM) are 33 % and 8 %, respectively. Derived simplified expression for the F/P is useful because the F/P can be calculated easily. (3) An improved LDM, which has 26 % higher F/P than those of the initial LDM, is designed by using the permeance analysis method and the FEM. 5 refs., 5 figs., 4 tabs.

  18. Study of human motion patterns for developing a transfer aid system for the elderly; Koreisha no tame no ijo kaijo kiki kaihatsu wo mokuteki toshita hito no dosa pattern ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tsuruga, T.; Ino, S.; Ifukube, T. [Hokkaido University, Sapporo (Japan); Sato, M. [Showa Univ., Tokyo (Japan); Tanaka, T. [Sapporo Medical College, Sapporo (Japan); Izumi, T. [Hokkaido Tokai University, Hokkaido (Japan); Muro, M.; Wakisaka, Y. [Nippon Seiko K.K., Tokyo (Japan)

    1998-03-01

    We have developed a transfer aid system for the elderly who need assistance in moving from a bed or a chair. We studied a comfortable posture for the elderly at an initial phase of standing. The subjects were divided into two age groups, the young group (mean 29.6 years), the elderly group (mean 65.0 years). In this experiment, the subjects were allowed to stand up from a chair by changing the angle of their ankles at the initial phase of standing. Sagittal plane kinematics, surface electromyographic (EMG) signals at lower limbs and ground reaction forces were measured using a 3 dimension motion analyzer, when each subject stood up from a chair. From the experimental results, when the initial angle of ankles was about 70 degrees and initial angle of the trunk was about 45 degrees while standing from a bed, the comfortable transfer aid motion was determined. From the above results, We ware designed a transfer aid system by using of a MH (Metal Hydride) actuator which is light, powerful, no-vibratile and silent. The transfer aid could enable a comfortable posture thanks to the help of the chest and knee pads at the initial phase. 12 refs., 12 figs.

  19. Study on an optimum ratio of PV output energy to WG output energy in PV/WG hybrid system; Taiyoko/furyoku hybrid hatsuden system no saiteki yoryohi ni kansuru kento

    Energy Technology Data Exchange (ETDEWEB)

    Nishikawa, S. [Kandenko Co. Ltd., Tokyo (Japan)

    1996-10-27

    A photovoltaic power (PV) and wind generated power (WG) are an unlimited clean energy source, yet their output is unstable depending on the fluctuation of weather conditions such as solar radiation and wind velocity. Consequently, a large-scale power storage equipment is necessitated leading to a high cost especially in an independent system. As a solution, a method is available in which PV and WG are combined so that the effect may be utilized for stabilizing the output of a system as a whole, at a site where a fluctuation pattern is different between photovoltaic energy and wind energy. In building a hybrid system by PV and WG, sites with such supplementary effect existing were selected from the viewpoint of stabilizing the fluctuation of the power generation in the long run; and then, an examination was made on the optimum PV capacity ratio (%Ppo) in each site. As a result, it revealed that the %Ppo had great bearing on a ratio of PV energy fluctuation to WG, which was converted to a numerical formula. A comparatively simple examination by means of meteorological data also indicated that the share ratio was possibly optimized between the quantities of PV and WG energy. 4 refs., 2 figs., 2 tabs.

  20. Research cooperation project on manufacturing technology supported by advanced and integrated information system through international cooperation (MATIC); Kan`i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    To support the advancement of basic industries including machine industry in Asian countries, research cooperation has been conducted for developing the manufacturing technology supported by advanced and integrated information system suitable for actual circumstances of individual countries. For the automotive and the parts industries, it is significant for the preparation works of manufacturing in overseas factories to possess common information between Japan and overseas factories. In this project, a system is constructed, which can be used in industries surrounding automotive industry, such as parts and facility industries, as well as in the automotive industry. In FY 1996, a primary system has been developed, and the demonstration tests were carried out. For the home electric machine and the parts industries, the technology applicable to the design of printed board circuit was developed, and the catalog of electronic parts was constructed. In FY 1996, a preliminary prototype system of the electronic parts catalog system was designed and developed. For the textile and apparel industries, the EDI, exchange system of CAD/CAM data, and construction of data bank were investigated. 87 figs., 19 tabs.

  1. Fiscal 1996 report on the investigational research on the construction of a database of physical functions; 1996 nendo chosa hokokusho (shintai kino database no kochiku ni kansuru chosa kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    For the purpose of realizing `the affluence` sought in the Japanese economic society, the supply and preparation of products, service and environments friendly to human beings seem to be important. In the future, the development of products which are fully considered also of aged and handicapped people is more expected than the conventional manufacturing of products added with value. Especially in accordance with the rapid aging, from a viewpoint that the lowering of physical functions caused by aging has an exactly close relation with the response to products and the environment, development of the database of physical functions for the aged which is useful for the design is urgently promoted. First, the data to be supplied for database were selected. As to the selection method, the data required for database were defined by collection/analysis of the existing data, examination of the needs of enterprise designers, and analysis of daily activities. In the study of the database, the structure by which data can be effectively supplied was studied and verified by pilot database for extraction of the subjects and solution to the problems. 6 refs., 57 figs., 26 tabs.

  2. Fiscal 1997 report on the survey of biological CO2 fixation using arid land and oligotrophic waters; 1997 nendo chosa hokokusho (kansochi, hin`eiyo kaiiki wo riyoshita seibutsuteki CO2 kotei ni kansuru chosa)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This survey is aimed to investigate various measures to be taken for biological CO2 fixation, to synthetically study feasibilities of the measures from various aspects of CO2 fixation mechanism, scale, speed, and environmental effects and technical problems in case of introducing those, and to assess the measures quantitatively. In this fiscal year, a study was proceeded with of possibilities of carbon fixation by afforestation and that by fertilization into ocean. The paper defined significance of afforestation in arid land, and especially advantages in conducting researches in West Australia. Relationships were examined among afforestation, precipitation and topography. The result of the survey was described of water- and salt-transfer simulation methods. Studies of arid land were made in terms of photosynthetic speed, transpiration speed, soil characteristics, measuring methods for precipitation and vaporization amount, and the examples. Seven places of Leonora where water source and water quality were examined were selected, and the measuring results were described. The paper summed up the state of utilization of biomass energy obtained from forest and commented on a scenario on tree-planting. Finally, a possibility was stated of the carbon fixation by fermentation into ocean. 178 refs., 121 figs., 53 tabs.

  3. Feature articles, thermal power and atomic power. Study on antiseismic property of breakwater bulkhead (model experiment of caisson dike and its numerical simulator). Karyoku, genshiryoku. Bohagogan no teishinsei ni kansuru kenkyu (keson tei no mokei jikken to sono suchi simulation)

    Energy Technology Data Exchange (ETDEWEB)

    Tochigi, H. (Central Research Inst. of Electric Power Industry, Tokyo (Japan))

    1994-05-31

    Recently the social demand is increasing for utilizing the offshore marine space for building an artificial island for air port or power plant. The improvement in reliability of safety of breakwater bulkhead is thus required. In order to rationalize and sensitize the evaluation method of antiseismic stability, the investigation in which the seismic behaviors such as sliding and settling are taken into consideration is required in addition to the conventional investigation based on the seismic intensity method. In this case, if the breakwater bulkhead constructed as the outer shell of the island can keep the stability of the reclaimed ground against the waves even after being deformed to some extent by sliding and settling, the stability of the backward facilities can be kept. In this study, a large scale experiment was conducted for understanding the seismic behavior of the breakwater bulkhead. A numerical simulation was also made for performing various dynamic test on the strength, deformation characteristic, and settlement property of the large size aggregate and for investigating the evaluation of seismic behavior. 7 refs., 16 figs., 1 tab.

  4. Report on follow-up for joint research of valuable resources recovery techniques from brackish water; Kansuichu no yuka shigen kaishu gijutsu ni kansuru kenkyu kyoryoku follow up hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    This report describes follow-up for research and development on the recovery of valuable resources, such as magnesium, bromine and boron, contained in the brackish water for manufacture of common salt in the coastal region of Mexico. For the field survey, salt garden, irrigation plant and manufacturing plant of dinning salt were inspected. The optimum site was examined by assuming desalination plant and solar pond. The groundwater in coastal regions is progressively salified. Since the coastal region is a tourist resort with an round-trip area of whales, environmental protection is indispensable. For the joint research with invited researchers, the solar pond system and fresh water generation were studied. As a result, it was found that the solar pond system is an excellent method for keeping thermal energy in a low cost at the salt garden with abundant solar energy, and that the desalination system combined with distilling is the most suitable method. 7 refs., 8 figs., 1 tab.

  5. FY 1996 Report on the research and development project for interdisciplinary area. Part.2. Research on bionic designs; 1996 nendo yugo ryoiki kenkyu kaihatsu. 2. Bionic design ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The objects of this project are to elucidate the self-organization mechanisms of a living body, e.g., functional adaptation to environments and self-restoration, to utilize the molecular interactions in a living body, and thereby to establish the basic technologies for developing molecular motor functions, e.g., artificial organs. Described herein are the FY 1996 results. For creation of living soft tissues, N-ePTFE and Gf are found to be good base materials for cell growth in the serum-free culture, and may be applicable to bio-reactors. Sugar-bound high-molecular-weight compounds and artificial hyaloid body are created. For hard tissue materials, e.g., artificial articulation, the macrophage is activated by englobing worn debris of polyethylene, to activate the broken bone cells that absorb the bone, causing the artificial articulation to become loose. For researches on molecular motor mechanisms, it is considered that myosin changes the head morphology to give a driving force to the muscle, and this concept is studied in detail. The photosynthesizing protein is a molecule related to light and electricity, and is useful as the material to apply the living functions to industrial technologies. The technologies for assembling molecules are studied by utilizing the self-organization functions of living molecules. Development of other molecular machines is also attempted. (NEDO)

  6. Fiscal 1996 international research cooperation project. Report on the R and D result of the environmental harmony type combustion technology; 1996 nendo kokusai kenkyu kyoryoku jigyo. Kankyo chowagata nensho gijutsu ni kansuru kenkyu kaihatsu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The research was conducted jointly with Europe of a catalyst which enables clean combustion and NOx removal in polluted gas in combustion flue gas, etc. Reformation of mordenite and {beta}-zeolite was done by ion exchange, ion implantation, and membrane formation. A catalyst was searched for to obtain reducing agents, C5-C8 components, by decomposing light oil. Saponite, clay compound, showed by copper and silver ion exchanges approximately 50% of activity under 20,000h{sup -1}, C3H6 reducing agent, and without steam. The effect of the temperature of sintering on NOx selective reductionality of silver-carrying alumina catalyst was studied, and in sintering at 800degC, activity increased. When using conductive oxides like ruthenium oxide for electrolyte, NO decomposition selectivity increased. As to the functional layer carried above the Pd electrolyte, iron oxide and magnesium oxide increased NO decomposition selectivity. PdO and rare earth oxides forming compounds controlled variation of activity by dissociation/reoxidation of PdO. As to PdO/Gd203, the initial methane combustion activity was favorable, but there was seen deterioration with age. 271 refs., 281 figs., 58 tabs.

  7. Study on electrical monitoring of fill-up improvement. Utilization of resistivity data for soil compaction management; Hiteiko mitsudo kanri ni kansuru kisoteki kenkyu. Moritsuchi seko kanri eno hiteiko yuko riyo

    Energy Technology Data Exchange (ETDEWEB)

    Ueno, N.; Hiramatsu, W. [Dai Nippon Construction, Gifu (Japan); Sugano, T. [Kyoto University, Kyoto (Japan). Faculty of Engineering

    1996-10-01

    At present, measurement of wet density and water content by radio isotope (RI method) is used for filling management. It is supposed for filling in road construction that putting-out thickness of banking material reaches nearly 1m in the future rapid construction, however, use of RI method is difficult because of inserting and installing of a radiation source rod, large measuring apparatus, and the legal regulation on radioactivity intensity. Application of resistivity measurement was thus considered. Since resistivity has the same parameter as compaction curve, and monotonously decreases with an increase in water content by volume, it is applicable as construction management index. The management reference of resistivity (Rm) is set by plotting of a compaction curve and corresponding resistivity curve, determination of the reference resistivity (Ro) corresponding to a maximum dry density and optimum water content ratio, and setting of the allowance to Ro according to soil or application. It was clarified that Rm is applicable as set for every filling material. 1 ref., 10 figs., 2 tabs.

  8. FY1995 study on property-gradient polymer electrolyte for rechargeable lithium batteries; 1995 nendo lithium niji denchi no tame no keisha tokusei kobunshi denkaishitsu no sosei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Polymer electrolytes are essential materials to develop safe and reliable rechargeable lithium batteries. Nobel 'property-gradient' polymer electrolytes in which ionic conductivity distributes along with their thickness were synthesized by employing plasma polymerization technology. Vinyl monomers bound with oligo-ether side chains via siloxane bond were served as starting monomers for plasma polymerization. Ionic conductivity of formed polymers changed along with their thickness. Monomer solutions containing lithium salt which were impregnated into porous matrix were polymerized by exposing RF plasma and directly gave polymer electrolytes. The polymer electrolytes showed distributing ionic conductivity through its direction of thickness; 'property-gradient' polymer electrolyte were prepared. Metallic lithium surface were covered with thin plasma polymer layer containing fluorine to suppress dendritic lithium deposition during charging. The layer reacted so fast that suppression of the dendritic deposition was not satisfactory. (NEDO)

  9. 1998 research cooperation project. Research cooperation on environment-compatible type water resource effective-utilization system; 1998 nendo kankyo taiogata mizushigen yuko riyo system ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    For the purpose of securing water stably and preventing water pollution in the Philippines, R and D were carried out on a wastewater treatment and water reclamation and reuse system which is easy to operate and maintain and low in cost through the research cooperation between the Philippine Industrial Technology Development Institute and Japan. According to the survey result of statistical data concerning water pollution load structure by industrial wastewater classified by the industry in the Philippines, enumerated are the food manufacturing industry, paper pulp manufacturing industry, and the textile dyeing industry as those greatly affecting water pollution in BOD exhaust and wastewater, etc. Consequently, with Ram Food Product Co. of vegetable processing and Solid Mill Co., of textile dyeing as plants to be studied, a wastewater treatment test was performed in a laboratory scale. From the result of the test, the pilot plant was basically designed to have 'anaerobic + aerobic treatment + tertiary treatment' for the treatment process, with an one-tank type UASB method used as the anaerobic treatment, with a sand filtration + activated charcoal treatment as the tertiary treatment, and with the cost effectiveness for water reuse set to be examined. (NEDO)

  10. Fiscal 1998 research report. Study on the feasibility of microorganism biotechnology for effective use of environmental pollutants. Pt. 2; 1998 nendochosa hokokusho. Kankyo osen busshitsu no shigenka no tame no biseibutsu bio technology riyo kanosei ni kansuru chosa. 2

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Study was made on the feasibility of microorganism biotechnology for effective use of environmental pollutants and unused resources. Microorganisms and microorganism enzymes for decomposing lignocellulose were viewed, and uses of hydrolysis products were summarized. Production of microorganisms applicable to fodder, composting, and production of energy sources (methane, hydrogen, ethanol) were studied. Use of vegetable fiber residues such as beer lees as fungus cultivation medium and conversion to valuable substances were also studied. Microorganisms treatment (MT) of wastes in fats and oils industry was summarized. Effective use of MT of protein waste from marine products was studied. MT of manures with the greatest impact on environment as livestock waste was summarized. The necessity of separate collection of domestic wastes, and composting and methane fermentation of kitchen garbage were reported. The feasibility of MT of plastic wastes, and decomposition of halogenated methane with high toxicity were also studied. (NEDO)

  11. Spray characteristics of dimethyl ether (D.M.E.) as on alternative fuel for diesel engine; Daitai diesel nenryo to shite no dimethyl ether (D.M.E.) no funmu tokusei ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Wakai, K.; Nishida, K.; Yoshizaki, T.; Hiroyasu, H. [Hiroshima University, Hiroshima (Japan)

    1997-10-01

    D.M.E. which was paid attention to as on alternative fuel for a diesel engine, was injected by using Bosch type injection pump and a hole nozzle into a high pressure and high temperature vessel. The spray was observed by using schlieren photography. Spray characteristics, such as, the tip penetration, the cone angle and the volume of the spray were and were compared with a diesel fuel spray. The following thing, and so on were found out as a results. The spray angle of the DME spray of atmosphere pressure Pa=0.1Mpa spreads out large in comparison with the diesel fuel spray, and the way of the change by the pressure is contrary to the case of the diesel fuel spray. 3 refs., 6 figs., 1 tab.

  12. Study of earthquake resistance and damage by earthquake disaster of reinforced concrete rigid frame bridge; Shinsai wo uketa RC ramen kokakyo no taishin seino to sonsho ni kansuru kento kekka

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-10

    Rigid frame elevated bridges built in the section of about 2.2km between Sumiyoshi and Nada of the JR Tokaido Main Line were inflicted devastating damage by the Hanshin-Awaji Big Earthquake Disaster. This article is a report of a comparative study of the earthquake resistance performance and the degrees of damage of the structures of rigid frame elevated bridges within altogether 158 two line elevated bridges in the area concerned. The results of the study are as follows; generally as the structure calculated to have higher earthquake resisting performance, as the degree of damage was less. The degrees of damage of the structures which were calculated to show precedence of shearing were many in being ranked A, besides its 68% showed the degrees of B rank or above, hence those inflicted considerable damage were extremely many. Regarding the structures in which the converted elastic response acceleration was calculated to be 1,200gal or more, they had no damage ranked A and B, hence no big damage occurred. Concerning the structures in which the converted elastic response acceleration was calculated to be 1,000-1,200gal, A rank damage was not observed, although some were ranked B. The technique of this time is based on the design technique to be used for railway concrete structures. 1 ref., 3 figs., 3 tabs.

  13. Development of graphical user interface for FE simulation system of shape rolling; Keiko atsuen FEM kaiseki system no kochiku to user interface no kaihatsu (keiko atsuen han`yo kaiseki system no jidoka koseidoka ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    Yanagimoto, J. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science; Kubota, H. [Toshiba Corp., Tokyo (Japan)

    1997-09-01

    The adaptive remeshing method used in FEM analysis of shape steels was expanded to rolling of general asymmetrically shaped steels. An user interface was also developed. In rolling a vertically asymmetric shaped steel, contact face with a material to be processed differs largely in upper and lower rolls as a geometric characteristic in a position in the width direction utilized in the adaptive remeshing (complexity of bore shapes and cross sectional shapes of the material to be processed, or in other words, the distribution of element density function `D` in the width direction). Conventional expressions related to the `D` cannot be applied. In this case, a greater value from among the `D` derived independently on the upper and lower roll surfaces is employed and used commonly to prevent deterioration of the internal element shape. A procedure was devised so that the internal nodes can have their elements maintain rectangular as much as possible. This paper describes examples of automatic element generation and of FEM analysis. In order for the analysis system to be usable for numerical experiment for bore design and pass schedule design, the system was so arranged that it can be handled with the same procedure as in a model experiment. Inherent input items were handled as default, so that the analysis is possible with input for only the rolling conditions. 1 ref., 6 figs.

  14. 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.

    1997-10-01

    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.

  15. Study on the change of aspect ratios of small surface cracks emanated from a toe of corner boxing; Mawashi yosetsudome tanbu kara hassei denpasuru bishi bisho hyomen kiretsu no aspect hi henka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Toyosada, M.; Yamaguchi, K.; Takeda, K.; Watanabe, Y. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-10-01

    The fatigue test of specimens with a stiffener was carried out to examine the change in aspect ratio (crack depth/length) of fatigue cracks in a stress concentration field and residual stress field. The aspect ratio of surface cracks just after generation can be represented with the single virtual surface crack with the same value as K value at the deepest point considering an interference effect from near cracks. No discontinuous change in K value is found at the deepest point even during growth and combination of cracks on a surface. The change in K value at the deepest point is thus the criterion to represent growth and combination of surface cracks considering the interference effect. The change in aspect ratio of the typical single virtual surface crack linearly decreases with an increase in crack depth. The shape of surface cracks generating and growing in a residual stress field is more flat than that in no residual stress field. In addition, in a residual stress field, surface cracks are longer at the same crack depth, and fatigue lives are shorter. 7 refs., 12 figs.

  16. Fiscal 1997 survey report on the trend of global warming protection measures of substituting freons; 1997 nendo chosa hokokusho (daitai freon no chikyu ondanka taisaku doko ni kansuru chosa hokokusho)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The trend survey was conducted of global warming protection measures by participation in international conferences, scientific society meetings and lecture meetings, and by literature surveys. We participated in the international conference on ozonosphere protection measures. In the 9th meeting of the nations which concluded the Montreal Protocol, the strengthening of restrictions on methyl bromide was decided on. In the UNEP solvent technology selection conference and the OORG conference of the World Bank, reports were made on substituting solvents in Japan, activities supporting developing countries, and the developmental trend of urethane use foaming agent. In the international conference on ozonosphere protection measures, introduced were the present status of Japan`s ODA for developing countries and examples of success of the substitution in the solvent field. The paper included nine reports on CFC destruction technology related literature made public in the past one year. The paper also introduced a comparative study of de-HCFC substituting technology at U.S. Oak Ridge National Laboratory, U.S. EPA`s prediction of emission of fluorine 3 gas, the predicted value of HFC emission and trial calculation of contributing rate in all greenhouse gases by IIR, Green Peace and Elf Atochem, and NOAA`s measured data on SF6 in the atmosphere. 49 refs., 46 figs., 26 tabs.

  17. Theoretical and experimental investigations on the nonspherical motion of a bubble near a plane rigid wall. Heimen gotaiheki kinbo deno kiho no hikyujo unten ni kansuru rironteki narabini jikkenteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Tomita, Y. (Hokkaido University of Education, Sapporo (Japan))

    1993-06-25

    The cavitation damage is judged to be mainly attributable to the impulsive pressure generated by the cavitation bubble collapse. Both theoretical and experimental elucidations were made of the nonspherical motion of bubble near on the plane rigid wall surface, characteristics of its subsequent migration and process of liquid microjet formation. Theoretically, applied were a boundary integral method and a mirror image theory. Experimentally, observation by high speed photography was made on the behavior of model bubble generated by an underwater focus of laser beams. To correctly evaluate the behavior of bubble near on the rigid wall surface, its motion must be interpreted from its growth process. An almost appropriate agreement was reached between both theory and experiment in its change in both shape and translational migration. Its interaction with the rigid wall is considerably strong in case of bubble which is less than 2 in nondimensional distance ([gamma]) from the bubbling point onto the rigid wall. Influence of the [gamma] on the jet velocity was also elucidated through evaluation of a microjet formation process by using trajectories. 25 refs., 18 figs.

  18. FY 1998 annual report on the study on development of corrosion-resistant ceramic materials for garbage incinerators; 1998 nendo gomi shori shisetsuyo taishoku ceramics zairyo no kaihatsu ni kansuru kenkyu chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Described herein are the FY 1988 results of development of corrosion-resistant ceramic materials for garbage incinerators. Residue released when porcelain stocks are collected is selected as the inexpensive stock for SiO{sub 2}-Al{sub 2}O{sub 3}-based refractory materials. It is incorporated with carbon black and reduced at 1,200 to 1,500 degrees C in a nitrogen atmosphere. Synthesis of the target Si-Al-C-N-O-based compound succeeds in the presence of a solid catalyst, but it is a fine powder, and hence that of the massive compound fails. The commercial ceramic materials and new refractory materials, made on a trial basis, are evaluated for their resistance to corrosion using fry ashes collected from a commercial incinerator. These ashes are higher in melting point, more viscous, holding a larger quantity of attached slag and more corrosive than synthetic ashes. These materials are corroded acceleratedly as temperature increases to 1,200 degrees C or higher, more noted with the ceramic materials than with the refractory materials. Oxidation and melting characteristics of the molten slag affect corrosion of some materials. Use of the graphite-based material shall be limited to a section below the slag surface, where graphite is oxidized to a smaller extent. The MgO-based material is promising. The Al{sub 2}O{sub 3}-Cr{sub 2}O{sub 3}-based material is more promising than any other material developed in this study. Their bending strength before and after the corrosion test is measured at normal temperature to 1,700 degrees C, to investigate their deterioration by high temperature and corrosion. (NEDO)

  19. Lecture by ceramist in college. From questionnaire about lecture issued by educational committee of the ceramic society of Japan; Seramikkusu wo kenkyusuru daigaku kyokan no kogi eno torikumi. Nihon seramikkusu kyokai kyoiku iinkai, kogi ni kansuru anketo yori

    Energy Technology Data Exchange (ETDEWEB)

    Fujitsu, Satoru.; Kishimoto, Akira.; Omata, Takahisa. Suda, Seiichi. [The Ceramic Society of Japan, Tokyo (Japan), Educational Comittee

    1998-11-01

    This paper reports the questionnaire results to ceramic lecturers in national and public universities and private universities by the Ceramic Society of Japan. Regarding lecture hours and burden sensation, there were differences between national and public universities and private universities. The number of students in a class was that the 51-100 group was 44% for national and public universities, and the over 100 group was 40% for private universities. Regarding intelligibility for lecture, the answers that the number of understanding students was less than 50% shared 63%, and answers that this intelligibility is still decreasing shared 44%, the reason being mostly due to insufficient efforts of students for study. The number of students in a class was that the 51-100 group was 44% for national and public universities, and the over 100 group was 40% for private universities. Regarding intelligibility for lecture, the answers that the number of understanding students was less than 50% shared 63%, and answers that this intelligibility is still decreasing shared 44%, the reason being mostly due to insufficient efforts of students for study. (NEDO)

  20. FY 1998 annual report on the survey on development, introduction and promotion of urban type multipurpose geothermal utilization techniques; 1998 nendo toshigata tamokuteki chinetsu riyo gijutsu no kaihatsu, donyu, sokushin ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Introduction of geothermal heat pump systems, which depend on temperature differential, is investigated for urban areas, which have large energy demands. Results of the surveys on the current situations of geothermal heat pump (GHP) systems indicate that they have already numbered 300,000 units in USA and totaled more than 50,000 units in Switzerland and Northern European countries, and that they are increasing at an annual rate of higher than 10%. The results also indicate that introduction of these systems are well feasible in Japan, which generally has better topographical conditions than American and European countries, and the GHP system with vertical ground heat exchanger is investigated for its topographical and environmental considerations. These systems could annually abate approximately 52 million tons of CO2 (4.3% decrease), if disseminated to all households. They are also expected to help control the heat island phenomenon, and reduce peak power consumption. The technological problems to be solved before these systems are massively disseminated including development of small scale drilling rigs and preparation of drilling manuals. System standardization and introduction of subsidy systems are also needed to massively disseminate these systems. (NEDO)

  1. FY1995 study of evaluating satisfaction of communication devices and brain computer interface for severely disabled people; 1995 nendo judo shogaisha no communication eido sosa shudan to tekisetsusa ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    Until now, the prescription of communication devices for disabled people has been dependent on the experience of technical experts who are working for them. To improve this situation, the aim of present study is to develop the objective methods for evaluating satisfaction of communication devices. Further aim of this study is to get the basic data for using electroencephalogram for thinking switch of communication devices. 1) Under imaging real communication devices, the menu of two experimental subjects were designed with three tasks which have different difficulty. Five physiological indexes (heart rate, coefficient of variation of R-R intervals, respiration rate, skin temperature and plethysmograph), which are known to closely correlated with mental stress, were studied during three different tasks in each experimental subject. In addition, psychological test were also performed before and after each tasks. In the first subject a significant difference was detected only in psychological test among three tasks. This result may come from the small difference of difficulty in each tasks of the first subject. In the second subject, significant differences were observed in the coefficient of variation of R-R intervals, the respiration rate and psychological test. Other physiological indexces, skin temperature, heart rate and plethysmograph, may be useful. However, the reconsideration will be needed to find the usefulness of these indexes for evaluating mental stress. 2) Biofeedback control of mu rhysm, an electrical brain wave, was investigated for the possibility of thinking switch in three graduate students. In one of three students, changes of amplitude were observed bilaterally although we had expected the unilateral change. Further studies will be needed to clarify the best method of biofeedback experiment. (NEDO)

  2. Achievement report for fiscal 1999 on specified international cooperative research project. Research on anthropometry using computer mannequin; 1999 nendo computer mannequin ni kansuru jintai model no keitai suitei gijutsu no kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    Studies are conducted about anthropometry using a computer mannequin for assessing the compatibility of virtual commodities and environments, fabricated by CAD (computer-aided design) or the like, with human beings, and the fiscal 1999 achievements are compiled. In the study of multidimensional equations of correlation for shape estimation, calculation of basic human model dimensions using 43 measurements has become feasible. For the construction of a human model using a computer mannequin, joint positions and distances between joints have to be determined using data which are measurements that cover human model surfaces. Such necessitates a study of shape estimating algorithm, and a basic physique calculation module and a shape estimation module have been developed. Verification is conducted using a computer mannequin, and it is found that much information is quantitatively determined prior to the manufacture of real goods, the said information involving the mechanism of a chair and the behavior of a human being in it, and the relations of the human behavior with peripheral equipment. (NEDO)

  3. Studies of technology of mass production and quality control in road base material using coal ash; Sekitanbai wo genryo to suru robanzai no ryosan hinshitsu kanri gijutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Shibata, Y. [Kawasaki Heavy Industries, Ltd., Kobe (Japan); Ozasa, K. [Center for Coal Utilization, Tokyo (Japan); Tsuzura, K. [Naruto Salt Mfg. Ltd., Tokushima (Japan); Izumi, H. [Nippon Hodo Co. Ltd., Tokyo (Japan)

    1998-05-10

    Use of granular solidified coal ash as a road base material has been studied to facilitate the large scale utilization of powdered material. The proposed technology of producing granular solidified coal ash includes steam curing combined with different unit operations. Investigations on the technological and quality control aspects make clear the followings: (1) A proper technology for large scale processing may consists of the following steps: kneading of coal ash with water around its plastic limit, low pressure molding, steam curing and crushing. (2) A road base material of good quality can be produced in large qualities from coal ash of fixed CaO content and unburnt carbon content. Further processing includes mixing with the amount of water based on the size and the time change degree of the consuming power in kneader, kneading and molding. The temperature of the kneading water should be adjusted to the ambient conditions. 4 refs., 7 figs., 3 tabs.

  4. Study on reservoir behavior based on gravity changes in the Hatchobaru geothermal field; Hacchobaru chinetsu chitai ni okeru juryoku monitoring kekka kara no chinetsu choryuso no kyodo i kansuru ichikosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Tagomori, K.; Nagano, H. [West Japan Engineering Consultants Inc., Fukuoka (Japan); Ehara, S. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Oishi, K. [Kyushu Electric Power Co. Inc., Fukuoka (Japan)

    1996-04-25

    Since extraction of geothermal fluid remarkably increased due to start of commercial operation of Hatchobaru geothermal power plant No.2 unit in 1990, geothermal reservoir behavior was monitored through gravity changes. As a result, Hatchobaru geothermal area was divided into three zones such as northern zone (A), central zone (B) surrounding A zone, and southern zone (C). Gravity increased in A zone as reinjection zone, while decreased in C zone as production zone. Gravity changes relatively well corresponded to pressure changes of the reservoir. Gravity halted to decrease during a period from the middle of 1992 to the beginning of 1993, and at present gravity is nearly constant or increasing. In particular, suspension of a remarkable decrease in gravity around Watarase Jigoku means that geothermal fluid is being supplied to the reservoir through NW-SE fault in the east of Hatchobaru area. The mass balance of Hatchobaru reservoir seems to be stable from the viewpoint of gravity changes. Generally the reservoir has gradually recovered from mass reduction with an increase in gravity since 1993. 5 refs., 11 figs.

  5. Fiscal 1997 report on the results of the research on the development of high-performance industrial furnaces. Volume 3; 1997 nendo seika hokokusho (koseino kogyoro no kaihatsu ni kansuru kenkyu seika hokokusto)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    A R and D was conducted for the purpose of developing remarkable energy conservation/CO2 reduction technologies. In fiscal 1997, the five working groups about the following were formed to have animated discussions: the basic research, heating furnace, heat treatment furnace, melting furnace, and tubular heating furnace. The research subjects are the pursuit/deepening of the base study on flame structures in high temperature air combustion, critical heat recovery of the system in high temperature air combustion, examination of the basic common technology on the ultimate optimization of the material heat transfer, construction of general-purpose experimental database, setting-up of design standards for general-purpose high-performance industrial furnaces, presentation of examples of the actual trial design based on the design standards and feasibility study of the practical application, preparatory support of the field test project on high-performance industrial furnaces for commercialization/diffusion/spread, etc. Further, how to arrange the developmental results was studied to make the results of the project useful for study of the prompt commercialization. 442 refs., 1444 figs., 311 tabs.

  6. Research cooperation report for fiscal 1997 on the environment-friendly system for effectively utilizing water resources; 1997 nendo kankyo taiogata mizushigen yuko riyo system ni kansuru kenkyu kyoryoku itaku gyomu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This effort exerted in cooperation with the Philippines aims to solve problems related to water resources such as stable supply and pollution of water through developing a waste water treatment/water reuse system which is easy to operate and maintain, and low in price. The ultimate goal includes (1) the construction of a waste water treatment/water reuse system comprising an anaerobic reaction tank and activated charcoal absorption tower, easy to operate and maintain, and low in price, (2) the employment of goods procurable in the Philippines, the goods including carriers for use in the anaerobic reaction tank, microbes for use in both aerobic and anaerobic reaction tanks, and activated charcoal for use in waste water reutilization, and (3) the establishment of optimum operating conditions for the waste water treatment/water reuse system by use of a pilot plant and the transfer of operating and managing techniques to the Filipino counterpart. In this fiscal year, investigations are conducted to disclose the actualities of waste water treatment and water consumption by primary industries in the vicinity of Laguna de Bay, and the waste water to be the object of study and the place of pilot plant installation have been selected. Also conducted are investigations into the carrier, microbe, activated charcoal, etc., for use in the anaerobic reaction tank. (NEDO)

  7. Experimental study on the effect of fiber reinforced rubber-rolled pin of the bridge restrainer plate system; Gomu dansho pin wo mochiita rakkyo boshi renketsuban no seiteki oyobi doteki oto tokusei ni kansuru jikkenteki kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Sonoda, Y.; Hikosaka, H. [Kyushu Univ., Fukuoka (Japan); Ishikawa, N. [Defence Academy, Yokosuka, Kanagawa (Japan)] Ikoma, N. [Shibata Industrial Co. Ltd., Osaka (Japan)

    1998-07-21

    As for the big earthquake like Hyogo Ken southern Earthquake, accident like collapsing of bridge girder is extremely difficult to prevent by only one bridge restrainer device. However, there exist considerable many spots not having enough space such as urban roads and so forth or the spots where the renewal of the existing restrainer device is difficult and as for these spots, it is thought that improvement of earthquake resistance performance is necessary by using the restrainer system based o the simple reformation of existing bridge restrainer plate system. In this report, under such condition, rolled pin winding the fiber reinforced rubber surrounding the connected pin was proposed as a technique for improving earthquake resistance by easy reformation of bridge restrainer of Spectacle type bridges which has many construction findings. In order to carry out characteristic and quantitative evaluation of the effect of rubber-rolled pin, two stages, o use level and ultimate level, were considered and static behavior and impact load characteristics for each level were studied experimentally, and comparison was made with the conventional steel pin. 13 refs., 19 figs., 6 tabs.

  8. Worldwide clean energy system technology using hydrogen (WE-NET). subtask 9. Investigation of innovative and leading technologies; Suiso riyo kokusai clean energy system gijutsu (WE-NET). subtask 9. Kakushinteki sendoteki gijutsu ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The WE-NET Project is a long-term project designed to ensure that an energy network technology using hydrogen becomes a reality not later than 2020. So the project cannot remain effective unless constant efforts are made to foresee future trends of technology and optimize it as the making of entire system for the project. In this project, new technologies which are not up for development are also investigated. Their feasibility should be studied, if necessary. From the foregoing point of view, new technologies are studied, collected and evaluated. Thus, useful suggestions and proposals may be made as to the course for the project to follow, as well as its research and development. Proposals highly evaluated up to FY 1995 are the hydrogen-oxygen internal-combustion Stirling`s engine, hydrogen production by solid oxide electrolysis, magnetic refrigeration technology for liquefaction of hydrogen, solar thermal hydrogen production with iron sponge technology, and hydrogen producing technology with photocatalyst. Conceptual investigation themes in FY 1996 are the hydrogen internal-combustion Stirling engine, solar thermal hydrogen production, phototransformation process, and high-temperature steam electrolysis. 9 figs., 54 tabs.

  9. Basic research on energy conservation in developing countries. Report of the International Conference on Adaptation and Mitigation Technologies for Climate Change; Hatten tojokoku energy shohi koritsuka kiso chosanado jigyo. Kiko hendo ni kansuru tekio kanwa gijutsu kokusai kaigi hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The International Conference on Adaptation and Mitigation Technologies for Climate Change was held based on the 1st Conference of the Parties in 1995 of the United Nations Framework Convention on Climate Change, and the 2nd evaluation report of the Intergovernmental Panel on Climate Change (IPCC). This report carries the outline of this conference and minutes. Japanese government had studied the framework of activities implemented jointly (AIJ) for emission control of greenhouse gases by voluntary workers jointly with developing countries. The government decided the basis of the AIJ Japan program in 1995, and approved the evaluation guidelines of this program including confirmed and considered matters which are necessary for government offices related to this program to evaluate and approve each project. IPCC approved the 2nd evaluation report in its general meeting in 1995. This conference was thus held to discuss strategic technology and international cooperation with participation of writers of the 2nd IPCC report, policy planners of Asian countries, Japanese industries, governmental offices and NGO.

  10. Fiscal 1997 report on the cooperative research on the preservation and sustainable utilization of biological diversification; Seibutsu tayosei hozen to jizokuteki riyo nado ni kansuru kenkyu kyoryoku (1997 nendo hokokusho)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Cooperative researches were conducted between Japan and Thailand, Indonesia and Malaysia for the purpose of the technology development to make developing countries themselves preserve bioresources existing in tropical forests and use those sustainably. The research subjects for Thailand are a strategical study on eating of the primates, improvement of a microorganism culture collection system, preservation of biological diversification using an artificial ecosystem, bioresource utilization, etc. The subjects for Indonesia are a study of a microorganism culture collection system, study of plant preservation technology, study of microorganism utilization technology, study of plant utilization technology, promotion of the founding of the Indonesia tropical bioresource information center, etc. The subjects for Malaysia are biological diversification database and gene bank, assessment/monitoring of the ocean ecosystem, assessment and inventory of the ecosystem using hi-tech technology, search/separation of bioactive substances originated from microorganism/plant, etc. 26 refs., 24 figs., 81 tabs.

  11. Study on a simple method for bending analysis of composite girders with corrugated steel webs; Hakei koban web wo motsu goseiketa no kan`i mage kaisekiho ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Taniguchi, N.; Yoda, T. [Waseda University, Tokyo (Japan). School of Science and Engineering

    1997-10-15

    An evaluation is being established on composite girders with corrugated steel webs that they are a composite girder having excellent mechanical characteristics. However, structural analysis of these composite girders is not easy even of the one-dimensional analysis. Therefore, a proposal was made on a simple method for bending analysis of a composite girder with corrugated webs having I-section subjected to bending. The result of the analysis using the proposed method was compared with measured values, and the reasonability of the test was investigated including that for the non-linear region. In this analysis, the I-section girder was converted equivalently into a multi-layered beam consisting of cross sections with an equivalent width, and displacement and stress in each layer were approximated linearly by dividing the multi-layered beam into fine layers of `N` number. Formulation was performed by using an ordinary matrix method based on the derived displacement field and stress field. An initial stress method was used for non-linearity analysis of the beams. This analysis was found effective in analyzing a beam subjected to strong effect of shear as in a corrugated steel web composite girder. Among the results of the linearity analyses, the displacement and stress agreed nearly well with the measured values. The non-linearity analysis was performed simply when combined with the initial stress method. 16 refs., 24 figs., 4 tabs.

  12. On the strength of composite steel-concrete structure of sandwich system (ultimate toughness under shear and bending model). 6th Report. Koban to concrete kara kosei sareru sandwich shiki fukugo kozobutsu no kyodo ni kansuru kenkyu. 6

    Energy Technology Data Exchange (ETDEWEB)

    Iwata, S. (Hitachi Zosen Corp., Osaka (Japan)); Hattori, Y. (Kanazawa Institute of Technology, Ishikawa (Japan))

    1994-01-01

    A model experiment was carried out on a composite steel-concrete structure of sandwich system. A quantification method was proposed on absorption energy in models of bending shear type and shear type. The model consists of concrete, upper and lower steel plates, partitions, and shift stoppers, on which static loading and iterative loading were applied. The following findings were obtained from the experiment: ribs with shift stoppers arranged in the model reduce strength and absorption energy; drilled girder webs increase these values and are effective; making the shift stopper shape flat remarkably reduces these strength properties; both the reinforced concrete placed internally to a structure and welded short stud bolts fracture the concrete; and the iterative loading causes cracks to propagate resulting in destruction of the concrete. A theoretical expression that analyzes ultimate deformation was induced. This is a calculation formula that separates deformation into bending and shearing, divides a structural beam into element blocks, and calculates deformation from cross sectional force of the elements. The calculation result showed good agreement with the measurements. 9 refs., 13 figs., 6 tabs.

  13. Research on the fracture behaviours of composite structural members subjected to axial compression, bending and shear. Mage sendan wo ukeru gosei buzai (RCter dot SRC) no hokai mode no bunrui narabini sono kyokai ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yamada, M.; Kawamura, H.; Tani, A. (Kobe Univ., Kobe (Japan). Faculty of Engineering); Zhang, F. (Matsumura-Gumi Corp., Osaka (Japan))

    1991-08-30

    Deformation analysis modes have been structured for RC and SRC columns subjected to bending and sear to study their elasto-plastic deformation properties. It is shown that fracture behaviors of columns can be evaluated when the proposed deformation analytical modes for RC and SRC columns subjected to bending and shear are used by noticing the deformation and stress states of the plastic hinge. The boundary of each fracture mode (boundary point, boundary expression) for RC and SRC columns subjected to bending and shear under constant compressive axial force can be obtained by this method, and the physical meaning of the boundary shear span ratio is clarified. The boundary expression is applied to unit shear wall to introduce a conditional expression for preventing shear fracture of the edge column of the shear wall. Virtual shear span ratio for edge column is obtained for unit shear wall, which is compared with the critical shear span ratio for avoiding shear fracture of the column, and judgement is made whether the edge column undergoes shear fracture or not. 16 refs., 19 figs., 2 tabs.

  14. Fiscal 1997 report on the results of the international standardization R and D. International standards for computers/manikins; 1997 nendo seika hokokusho kokusai hyojun soseigata kenkyu kaihatsu. Computer manikin ni kansuru kokusai hyojun kikaku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Through the development of computer manikins (CM) which assess human adaptability to products and environments, a draft for international standardization was worked out to propose to ISO. A draft for the international standardization was presented to ISO through a development of `a structure model` changing based on human attributes, a study of `a motion model` enabling changes in posture and movement, a study of `an evaluation model` evaluating attainment ranges and ecodynamic loads, and a development of `computer functions` realizing the above-mentioned functions. The development of CM having the following characteristics: a function to reproduce `the structure model` based on the ISO7250 human body dimensional measuring values which were regulated in items for the human body dimensional measuring, a function to change posture/movement based on the joint movable range data, a function to evaluate geometrical human adaptability such as attainment ranges. As a plug-in to Autodesk Mechanical Desktop 2.0, the above-mentioned functions were realized, and the modular structure platform was constructed which enables the wide-range cross-industry option and functional expansion by the advance of CM. 7 refs., 41 figs., 18 tabs.

  15. Study on turning performance of four-track steering vehicles. Effect of traction force and track speed distribution control; Sodashiki sokisha no senkai seino ni kansuru kenkyu. Kudoryoku haibun to sokudo haibun no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Imamura, M.; Watanabe, K.; Kitano, M. [National Defense Academy, Kanagawa (Japan)

    1997-10-01

    The four-track steering vehicles (4TS) is a new type of off-road vehicle which can replace four wheels with track units to improve the mobility on soft terrains. In this paper, the numerical simulations, under the various types of differential and track velocity control systems, are conducted to predict the turning performance and steer ability of the 4TS vehicles. The results of the numerical analysis demonstrate that the differential systems with realistic combined distribution control systems of the track speed is efficient at a small turning radius. 4 refs., 13 figs.

  16. Study on a small diesel engine with direct injection impinging distribution spray combustion system. Optimum of injection system and combustion chamber; Shototsu kakusan hoshiki kogata diesel kikan ni kansuru kenkyu. Funshakei to nenshoshitsu no saitekika

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, K.; Kato, S.; Saito, T. [Kanazawa Institute of Technology, Ishikawa (Japan); Tanabe, H. [Gunma University, Gunma (Japan)

    1997-10-01

    This study is concerned with a small bore (93mm) diesel engine using impinged fuel spray, named OSKA system. The higher rate of injection show lower smoke emission with higher NOx Emission. The exhaust emission and performance were investigated under different compression ratio with higher rate of injection. The experimental results show that this OSKA system is capable for reducing the smoke emission without the deterioration of NOx emission and fuel consumption compared with the conventional DI diesel engine. 5 refs., 8 figs., 3 tabs.

  17. Improvement of shear capacity of existing reinforced concrete members with sheet type carbon fibre reinforcement. Sheet jo renzoku tanso sen[prime]i hokyozai wo mochiita kisetsu tekkin concrete buzai no sendan tairyoku kojo koka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Uji, K. (Taisei Corp., Tokyo (Japan))

    1992-07-15

    Studies were conducted on the preventive effect of Carbon fibre sheets(CFS) used for reinforcement of brittle shear-fracture of existing concrete members, and on their fundamental anti-shear mechanism. The following were made clear by the experiments with concrete beams. Concrete members without stirrups were reinforced in their shear capacity to a great extent by winding them up or sticking onto them with CFS. Concrete members with stirrup were able to reduce the shear stress of stirrups to bear by disposing CFS. The strain values of CFS and a stirrup differ with each other even in the same location, since the elongation of CFS stuck onto concrete took place on shearing only in the cracking spot, whereas that of a stirrup was homologous along its length. Therefore, tensile force on CFS and a stirrup did not correspond to a ratio of reinforced areas by them. Though the cross section area reinforced by stirrups was four times as large as that by CFS, tensile force on stirrups was 1.2 times as mush as that on CFS. This means that CFS shears more shearing stress than stirrups. 12 refs., 12 figs., 6 tabs.

  18. Fiscal 1997 report on the survey project on planning to execute `The New Earth 21`; 1997 nendo chosa hokokusho (`chikyu saisei keikaku` no jisshi keikaku sakusei ni kansuru chosa jigyo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Japan proposed in the Houston Summit the New Earth 21 to be carried out with technology development and technology transfer, and to make a concrete development of the project, Japan also proposed in the Tokyo Summit a TREE Plan for working out comprehensive strategies of the innovative technology development. In the CO3 Kyoto Conference in 1997, numerical targets for developed countries were determined which have legal binding force for control/reduction of greenhouse gas emissions in the term of 2008-2012. It was agreed to urge developing countries also to play a certain part in the project through the clean development. Therefore, the paper made quantitative analysis of important CO2 prevention technologies, technology transfer costs, and economical assessment by energy conservation. As a model, the DNE 21 model was upgraded and used into which CO2 prevention technologies, energy, economy and climate changes were integrated. In fiscal 1997, the following were carried out: collection of data on important CO2 prevention technologies and systems and analytical assessment using the DNE 21 model, CO2 reduction and selection of energy technology, assessment of energy system costs, construction of the unified DNE 21 model, and opening of the international workshop. 62 refs., 98 figs., 34 tabs.

  19. FY 1997 report on the study on the formation condition of hetero-structure of single-crystalline semiconductor thin films; 1997 nendo chosa hokokusho (tankessho no handotai usumaku hetero kozo no keisei joken ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    Since ion implantation causes material degradation by formation of crystalline defects, and hydrogen embrittlement deteriorates material strength, reduction of such defects has been positively studied. Study was made on a new active application of hydrogen separation into ion implantation defects. After H ion implantation of a proper depth into single-crystalline Si and SiC and successive annealing, single-crystalline films of sub-micron to several micron thick were obtained by hydrogen-induced delamination at the implantation depth due to hydrogen embrittlement in crystalline defects. The implantation depth is dependent on implantation energy. H atom forms (111) face defect through connection with dangling bond of crystalline defects. This crystal face defect forms a delamination plane through (100) face cleavage. This hydrogen embrittlement delamination by ion implantation is applicable to production of light-weight high-efficiency single-crystalline Si solar cells, and large single-crystalline SiC wafers as new resource saving process. 33 refs., 19 figs., 2 tabs.

  20. Investigational study of evaluation of the global energy system as a global environmental protection technology; Chikyu kankyo taisaku gijutsu toshite no global energy system no hyoka ni kansuru chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    With relation to some global energy systems of which viability is predicted in the future, an evaluation was conducted from the viewpoints of economical efficiency, energy balance, CO2 emission, etc. The fossil fuel CO2 capture system, the conventional thermal power plant added with CO2 recovery/treatment facilities, is expected to reduce approximately 70-75% of the CO2 emission. The fossil fuel decarbonated hydrogen system, which decarbonates fossil fuels, recovers/treats CO2 at the place of fuel supply and uses as hydrogen, is of poor practical application from an economical point of view. The fossil fuel methanol synthesis system, which synthesizes methanol from fossil fuels at the place of fuel supply, generates electric power and recovers/treats CO2 with the methanol, is large in energy loss and CO2 emission and low in overall efficiency and CO2 reduction effect at the time of methanol synthesis. The renewable energy hydrogen system is an ultimate system with no emission of CO2, though it costs much. 110 refs., 83 figs., 107 tabs.

  1. Investigation of techniques for analyzing and evaluating the effects of newly developed new-energy and energy-saving technologies; Shinsho energy gijutsu kaihatsu koka no bunseki hyoka shuho ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    For the comprehensive and rational evaluation of technologies related to new energy and energy saving, investigations have been conducted about the history and trend of related policies and technological development. Japan saw a great change in the demand-supply structure in 10 to 15 years following the first oil crisis when oil was partially replaced with atomic energy and LNG and energy-saving efforts came into practice. However, the diversification of energy sources by developing new energies and improvement on the self-sustenance rate remain far from success. Related policies both in Japan and overseas are shifting from the conventional efforts for stable supply and economic growth to the handling of deregulation and environmental problems. Energy stratagem has been studied, not regarding energy technology as a mere economic task and working out how the demand for energy should be with the restricted resources, social economy, and environments, taken into account. Models and scenarios are proposed, for the quantitative analysis and evaluation of the energy stratagem wherein the development of technologies for new energy and energy saving are positioned clearly. Especially, concepts emphasized therein are the technique of power source planning and the development of regenerative energy. 24 refs., 32 figs., 15 tabs.

  2. Research cooperation project on the development of easy injection molding control technology for engineering plastics; Engineering plastic no seikei joken kan`i settei gijutsu ni kansuru kenkyu kyoryoku jigyo seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    In order to enhance the industries which supply assembly parts to Japan`s assembly industries in Thailand, research cooperation project on the plastic parts production technology has started. For the research cooperation, the mold design is effectively conducted using simulation technique of CAE (computer aided engineering), and an international easy injection molding control system is made using the molding support software for injection molding machines. In FY 1996, actual situations of plastic parts and assembly industries in Thailand have been investigated through the cooperation with the counterpart of Thailand. Demand and supply of engineering plastics, receive and inspection of parts, and current circumstances of molding processing makers in Thailand have been grasped. Based on the results of this investigation, proposal of basic plan, time schedule, and delivery plan of molding machines and testing equipment have been discussed, to make the basic plan. 18 refs., 4 figs., 23 tabs.

  3. Research of the elastic waves generated by a pulse laser. Excitation mechanism of elastic waves and application to nondestructive testing; Pulse laser de reikishita danseiha ni kansuru kenkyu. Danseiha reiki no mechanism to hihakai kensa eno oyo

    Energy Technology Data Exchange (ETDEWEB)

    Cho, H.; Takemoto, M. [Aoyama Gakuin University, Tokyo (Japan). College of Science and Engineering

    1994-07-20

    A bulk wave is generated when a pulse laser is irradiated to the material, and the characteristics of a Young`s modulus and Poisson`s ratio can be nondestructively estimated from the bulk wave. The generation mechanism of laser ultrasonic waves must be first clarified for such application. In this paper, fundamental research was conducted to study the generation mechanism of the elastic waves excited by a Q-switched Nd-YAG laser, and the generation method and characteristics of Rayleigh waves. The following result was obtained. A bulk wave is generated by the disk-like adiabatic expansion near the surface if the laser power is small when a spot-shape pulse laser was irradiated. A bulk wave is generated by the thin disk-like adiabatic expansion beneath the surface due to the thermal diffusion in the depth direction of a base material when the laser power becomes large. Moreover, a bulk wave is generated by the impact force due to abrasion and plasma when the power becomes still larger. The information on the bulk wave characteristics and Rayleigh wave was also obtained. 25 refs., 15 figs., 1 tab.

  4. Study on the annular leakage-flow-induced vibrations. 1st Report. Stability for translational and rotational single-degree-of-freedom systems; Kanjo sukimaryu reiki shindo ni kansuru kenkyu. 1. Heishin oyobi kaiten 1 jiyudokei no anteise

    Energy Technology Data Exchange (ETDEWEB)

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

    1999-07-25

    This study reports the stability of annular leakage-flow-induced vibrations. The pressure distribution of fluid between a fixed outer cylinder and a vibrating inner cylinder was obtained in the case of a translationally and rotationally coupled motion of the inner cylinder. The unsteady fluid force acting on the inner cylinder in the case of translational and rotational single-degree-of-freedom vibrations was then expressed in terms proportional to the acceleration, velocity, and displacement. Then the critical flow rate (at which stability was lost) was determined for an annular leakage-flow-induced vibration. Finally, the stability was investigated theoretically. It is known that instability will occur in the case of a divergent passage, but the critical flow rate depends on the passage increment in a limited range: the eccentricity of the passage and the pressure loss factor at the inlet of the passage lower the stability. (author)

  5. Theoretical research relating to excitation spectrum of furan. Application of integral direct coupled cluster linear response (direct CCLR) method; Furan no reiki supekutoru ni kansuru ronriteki kenkyu. Integral-direct Coupled Cluster Linear Response (direct CCLR) ho no tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Shigemitsu, Yasuhiro. [Nagasaki Industrial Technology Center, Nagasaki (Japan)

    1999-07-01

    heoretical researches relating to excitation spectrum of furan have been carried out for many years, and they reveal the problems that should be solved in order to predict highly reliable excitation energy. In general, it is difficult to uniformly obtain highly reliable calculation results for all excitation states since different excitation states show different electronic correlative effects. Means for obtaining the electron states in ground state and excited state and calculating the energy difference thereof is the mainstream of the theoretical calculation of the excitation energy. CASSCF/CASPT 2 developed by Roos et al. is a typical method excellent in quantitative description. Recently, the comparison between direct CCLR and CASSCF/CASPT 2 as examples for calculating the excitation spectrum of furan was carried out by using the same ground function. For Rydberg excitation, CC3, CAS, CASPT 2 show good agreement with each other. (NEDO)

  6. Fiscal 1998 research cooperation project. Research cooperation on diversity preservation and sustainable use for living organisms; 1998 nendo seibutsu tayosei hozen to jizokuteki riyo nado ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This report describes the titled research cooperation. Joint R and D with Thailand, Indonesia and Malaysia was made on collection and preservation of bio-resources such as tropical rain forest, and sustainable use of them by developing countries themselves. The project includes the simple identification and preservation technology of biospecies such as microorganism, assessment and monitoring technology of ecosystem, search of useful functions of biospecies, and construction of a bio-resource information network. This project promotes conversion of excessive hunting into resource conservation in agriculture, forestry and fisheries industries, and establishment of the basis of new product development in chemical and pharmaceutical industries. This project also contributes to preparation of the basic scheme of developed countries including Japan to countries holding bio-resources in addition to industrial basis preparation of every country. Until 1997, basis establishment has been made such as training of researchers, preparation of equipment and technical guidance, and in the final 1998, various results such as extraction of promising samples from microorganisms were obtained. (NEDO)

  7. Accident reconstruction to analyze impact of injured drivers during the collision. Ankle fracture in the car-to-car offset frontal collision; Join no jusho jokyo ni kansuru jiko saigen. Joyosha doshi no offset zenmen shototsuji no ashi kansetsu kossetsu

    Energy Technology Data Exchange (ETDEWEB)

    Sakurai, M. [Japan Automobile Research Institute Inc., Tsukuba (Japan)

    1997-10-01

    An accident reconstruction test of car-to-car crash was conducted in order to analyze the impact on the driver in the offset head-on collision. The ankle fracture of the driver resulting from the accident was examined with the test results and the accident data. The test results of the car-to-car crashes indicated that the belted driver`s ankle would have fractured in the early stage of the crash. The detailed information from the accident data, especially the cars` interior deformation and the driver`s X-ray photographs, was also very important in analyzing injury mechanisms of the ankle/foot region. The above results suggested an injury mechanism that the ankle joint fracture was due to dorsiflexion and valgus resulting from the impact and intrusion of the toeboard in the early stage of the crash. 12 refs., 11 figs.

  8. FY1990 research report on the support for promotion of distributed new power source technology introduction and measures for their popularization and lightenment; 1990 nendo bunsangata shinhatsuden gijutsu donyu sokushin shien to fukyu keimo no arikata ni kansuru chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-03-01

    To avoid economic and technological risks upon initial introduction of distributed new power source technology, methods for reduction in the initial investment burden under the lease system and methods for risk reduction under the insurance system are discussed, and each is evaluated for their applicability to the new technology. Methods for popularizing and enlightening the technology are also discussed using the result of a 'survey for promoting the introduction of new energies' conducted into local autonomies assuming the role of diffusing the new technology into the residential and commercial sectors. Through the review of the current status of initial investment burden reduction methods mainly under the lease system and through some case studies, the applicability of such methods to the new technology is discussed. Similar studies are also made by investigating the current status of risk reduction methods and by conducting case studies, these centering on various kinds of machinery insurance. Questionnaires are sent to local autonomies, who play an important part in the initial introduction into and popularization in the residential and commercial sectors, to learn their consciousness of energy problems and of distributed new power source technology introduction. The result is used to review how popularization and enlightenment activities should be conducted. (NEDO)

  9. Manufacturing technology supported by advanced and integrated information system through international cooperation in fiscal 1995; Kan`i sosagata denshi sekkei seisan shien system no kaihatsu ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Informatization using mainly computers is more and more important contributing to the upgrading in society, economy and a variety of fields. As to informatization in developing countries, however, there has still been few to be seen. Accordingly, gaps are getting larger between developing countries and developed countries where informatization is acceleratedly advanced. In the light of such actual state, Center of the International Cooperation for Computerization (CICC) contracted with NEDO and promoted a project `Manufacturing technology supported by advanced and integrated information system through international cooperation.` This is a project to study jointly with five Asian countries with which NEDO made a basic contract, China, Indonesia, Malaysia, Singapore and Thailand. Working group is set up for each theme such as automobiles/parts, electric home appliances/parts, and fiber/apparel, to study the construction of a model house and the design of a system. In fiscal 1994, the field survey was conducted, and in fiscal 1995 the system design was started. 16 figs., 1 tab.

  10. Investigations on a global environment improving technology utilizing biological functions. 2. Structuring a ligno-bioprocess; Seibutsu kino wo riyoshita chikyu kankyo kaizen gijutsu ni kansuru chosa. 2. Riguno bio process no kochiku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    Discussions were given to reserve global environments on reducing dependence on fossil resources and more effectively utilizing wood resources. Economically utilizable amount of wastes from lumbering factories reaches about five million tons annually. Discussions were made on a ligno-bioprocess that uses these wastes. The current quantitative production efficiency of cellulase by means of bacterial breeding is very high. A problem is production of ligninolytic enzymes, to which application of the recombinant DNA method is indispensable. Combination of steam explosion with biological decomposition or the organosolv process is an effective method for lignin decomposition. Decomposition of cellulose by using the ultra critical water method is worth noticing. With respect to hemicellulose utilization, production of cellulose derivatives, biodegradable polymers and oligosaccharides would be conceivable by means of esterification and etherification. Vanillinic acid, adhesives, resins and lignin-based polymer materials could be manufactured from lignin. Material cost for these products accounts for about 35% of the product price, thus making the lignochemicals promising commercial products. 301 refs., 71 figs., 39 tabs.

  11. Study of reaction and heat release from solid combustion in strong magnetic field; Kyojiba wo riyoshita hikinshitsu kotai nensho shori no hanno to netsu no seigy ni kansuru kiso kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Ito, K.; Fujita, O.; Iiya, M.; Kudo, K. [Hokkaido University, Sapporo (Japan)

    1997-02-01

    To establish the inhomogeneous solid combustion control technology, effects of the strong magnetic field on the solid combustion were examined. When applying the sufficiently strong magnetic field, it is possible to control the air flow in combustion field by utilizing the force applying to constituent oxygen with large susceptibility. Based on this possibility, combustion experiments of expanded polystyrene plates were conducted between the magnetic poles of electro-magnet having the maximum flux density of 1 T and the maximum magnetic field gradient of 0.5 T/cm. To observe the effects of magnetic field without the effects of natural convection, combustion experiments of acrylic sheets were conducted between the magnetic poles of electro-magnet having the maximum flux density of 0.6 T and the magnetic field gradient of about 0.1 T/cm under the microgravity conditions between 10{sup -4} and 10{sup -5}g using a microgravity test facility. Consequently, prospective combustion results could be obtained, in which the force of flame received from the magnetic field is almost equivalent to the buoyancy of flame. It was demonstrated that combustion can be controlled by the magnetic field. 1 ref., 3 figs., 1 tab.

  12. Study of thermodynamic properties of HFC refrigerant mixtures for Loretz-cycled niew generation air-conditioning equipment; Lorentz cycle ka shinsedai kucho kikiyo HFC kei kongo reibai no netsu rikigaku seishitsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Watanabe, K.; Sato, H. [Keio University, Tokyo (Japan). Faculty of Science and Technology

    1997-02-01

    This paper describes thermodynamic properties of HFC refrigerant mixtures for Lorentz-cycled new generation air-conditioning equipment. Equipment has been completed for simultaneous measurement of density and vapor-liquid equilibrium property, accurate measurement of latent heat of vaporization, and accurate measurement of specific heat at constant pressure in liquid phase. Final adjustment and preliminary measurements are currently conducted. Through analytical investigation using actually measured data of thermodynamic properties of HFC refrigerant mixtures, five state equations were obtained, i.e., modified Peng-Robinson state equation which can reproduce the vapor-liquid equilibrium property of refrigerant mixtures, modified Patel-Teja state equation, Helmholtz function type state equation which is applicable in the whole fluid region of refrigerant mixtures, and so on. An evaluation test equipment has been fabricated as a trial for Lorentz-cycled air-conditioning equipments using HFC refrigerant mixtures, and demonstration test is conducted to confirm the validity. 9 refs., 5 figs.

  13. FY 1997 report on the study on development of corrosion-resistant ceramics for refuse incinerators; 1997 nendo chosa hokokusho (gomi shokyakuroyo taishoku ceramics zairyo no kaihatsu ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper describes development of structural materials for municipal refuse incinerators, in particular, high- temperature corrosion-resistant ceramics for inner walls. Unlike boiler tubes of which inner walls are cooled by water or water vapor, refractory for inner walls is subjected to high-temperature flame over 1000degC, corrosive gases such as HCl and SO2. and low-melting point corrosive dust such as chloride, sulfate and oxide under strong corrosive environment. Experiment was made on 14 kinds of ceramics including commercially available oxide system, non-oxide system and refractory system ceramics. Except graphite system ones, every ceramics, in particular, Al2O3, ZrO2, B4C-doped SiC and CVD-SiO showed superior properties. Commercially available ceramics, in particular, non-oxide system ones are very expensive. Since inner wall materials for refuse incinerators are heat-/corrosion-resistant consumption articles, it is suggested that improvement of reasonable oxide system ceramics or conventional SiC system ones is better. 73 refs., 89 figs., 39 tabs.

  14. Effect of operating methods of wind turbine-generator system on net power extraction under wind speed fluctuations in fields; Hendo fukyoka deno doryoku chushutsu kara mita furyoku hatsuden system no unten seigyoho ni kansuru kosatsu

    Energy Technology Data Exchange (ETDEWEB)

    Wakui, T. [Japan Society for the Promotion of Science, Tokyo (Japan); Hashizume, T.; Ota, E. [Waseda University, Tokyo (Japan). School of Science and Engineering

    2000-01-25

    The effect of operating methods of wind turbine-generator system on net power extraction under wind speed fluctuations is discussed in relation to the dynamic behavior of the system. The system is composed of a Darrieus-Savonius hybrid wind turbine and a load generator. In this paper, two types of operating method are examined; constant tip speed ratio operation for stand-alone power systems (Scheme 1) and synchronous operation for utility power systems (Scheme 2). The computed results of the net extracting power using our dynamic simulation model show that the dominant factor of power extraction in Scheme 1 is the dynamic characteristics of rotational components and that it is important to select the appropriate rated wind speed in Scheme 2. Thus, it is concluded that a conformable operating method and rated power output of the system exist for each wind condition. In particular, small-scale systems, which are smaller than approximately 10 kW-system range, are desirable to be operated under a constant tip speed ratio as stand-alone power systems. (author)

  15. Report for fiscal 1998. Joint research of environment-friendly system for effectively utilizing water resources; 1998 nendo hokokusho. Kankyo taiogata mizushigen yuko riyo system ni kansuru kenkyu kyoryoku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The research is conducted in cooperation with Industrial Technology Development Institute of the Philippines, and aims to solve water related problems such as unstable water supply and water quality pollution though developing a waste water treatment and recycling system which is easy to operate and maintain, low in cost, and usable in the Philippines. Fiscal 1998 is the second year of the project. Statistics are studied about the load that each industrial branch imposes on water for its pollution, and it is found that food manufacturers, paper pulp mills, and fiber dyeing plants are heavily responsible for water pollution. A method consisting of single-tower UASB anaerobic treatment and activated sludge treatment is applied as a water treatment process to Ram Food Products Corporation, and its optimization is studied. A removal rate 60% is achieved after a 12-hour treatment period at a COD (chemical oxygen demand) rate of 8g/liter/day. A method consisting of coagulating sedimentation and activated sludge treatment is applied to the waste water from a Solid Mill Corporation dyeing plant, when it is found that the water after ultimate treatment is almost colorless and that COD is 76mg/liter and BOD (biological oxygen demand) 13mg/liter, and these suggest that the waste water is recyclable. Since it is low in COD removing rate, the application of anaerobic treatment to high-concentration water after washing is not appropriate. (NEDO)

  16. Fiscal 2000 survey report. Research on bone-forming dental material capable of reducing plaque adhesion; 2000 nendo shiko fuchaku boshigata hone keisei shika zairyo ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Research and development efforts are exerted to produce advanced dental materials equipped with such functions as plaque reduction, bactericidal effect, and early formation of hydroxyapatite (HAP). In the study of fluorine ion implantation for plaque reduction, it is found that in a specimen implanted with fluorine ions the adhesion of carius streptococci is reduced to 1/3-1/10 for the achievement of remarkable improvement. In particular, carious streptococcus multiplication is suppressed when the metal shield layer is replaced with a titanium mesh. For the realization of a thin film formation method for osteoblast multiplication through reforming the material surface in the study of bone-forming dental materials, film formation conditions under which a P/Ca rate which is quite near that of ameloblast are achieved by use of a high frequency magnetron sputtering device. A titanium plate coated with a thus-formed film is annealed for a great increase in its wet contact angle, and then adhesion of bacteria is reduced and an osteoblast multiplication rate is increased by 20% or more, as compared with the case of no treatment in a petri dish. (NEDO)

  17. Report for fiscal 1995 on commissioned operation for research cooperation related to simplified purification system for industrial waste water; 1995 nendo sangyo haisui nado no kan'i joka system ni kansuru kenkyu kyoryoku hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    With an objective to serve for environmental preservation in developing countries, joint researches have been performed on anaerobic waste water treatment systems utilizing bio-technology. This paper summarizes the achievements in fiscal 1995. In the research cooperation with Thailand, a bench scale testing equipment was used to verify activity of granules, and granulation tests were performed. In the operation research by using a pilot plant, abrupt variation in quality of the feed waste water was encountered, whereas both of the fixed bed system and the UASB system have not reached the stage of tests at the targeted load. In the research cooperation with Indonesia, the actual waste water test in the laboratory scale verified that Tofu manufacturing waste water may be easily decomposed anaerobically, and the kitchen waste water aerobically. The bench scale test is in continuation on actual waste waters by experimenting the applicability of the fixed bed and UASB reactors. In the research cooperation with Malaysia, analysis was performed on chemical factory waste water properties, and so was the anaerobic treatment characteristics test in the laboratory scale. In addition, a preliminary experiment using the bench scale testing device was begun. (NEDO)

  18. Report for fiscal 1994 on commissioned operation for research cooperation related to simplified purification system for industrial waste water; 1994 nendo sangyo haisui nado no kan'i joka system ni kansuru kenkyu kyoryoku hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-03-01

    With an objective to serve for environmental preservation in developing countries, joint researches have been performed on anaerobic waste water treatment systems utilizing bio-technology. This paper summarizes the achievements in fiscal 1994. In the research cooperation with Thailand, a reactor applicability test was performed by using a pilot plant to determine the operating conditions, and necessary data were obtained. The pilot plant was completed of installation in November. In the research cooperation with Indonesia, Tofu manufacturing waste water was selected as the object of pilot plant research. In the detailed design the Tofu manufacturing waste water shall be treated anaerobically, and the kitchen waste water shall be treated aerobically to acquire the intended water quality. In the research cooperation with Malaysia, as a result of visiting six industries and 22 factories for investigation, waste waters from chemical and foodstuff factories were selected as the object waste waters for the research. Three researchers from Thailand and Indonesia respectively were received in Japan to provide education including experimental training and visits to waste water treatment facilities. (NEDO)

  19. Expressional and functional analyses of transcription factors activated by BMP-4s signaling in early xenopus embryo; BMP-4 shigunaru dentatsu kiko to sono hyoteki kakunai tensha inshi ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Maeno, Mitsugu [Niigata University, Niigata (Japan). Faculty of Science

    1998-12-16

    The expression and physiological function of two transcription factors, GATA-2 and Xmsx-1, in amphibian embryos has been analyzed. The expression of these mRNAs in embryonic cells were firmly regulated by the BMP-4 signaling, that plays a central role in the formation of ventral tissues. The microinjection studies of GATA-2 RNA into embryonic cells suggested that this factor functions in two adjacent germ layers, mesoderm and ectoderm, to participate in blood cell formation in ventral area of embryo. Embryos injected with Xmsx-1 RNA, but not with GATA-2, in dorsal blastomeres exhibited a ventralized phenotype, with microcephaly and swollen abdomen. Thus, Xmsx-1 is a ventralizing agent. However, on the basis of molecular marker analyses, Xmsx-1 did not promote erythropoietic differentiation, but promoted muscle tissue formation. It has been concluded that Xmsx-1 si a target transcription factor of the BMP-4 signaling, but possesses a distinct activity on dorso-ventral patterning of mesodermal tissues. (author)

  20. FY 1998 annual report on the exploration and production of functional peptide from unutilized protein resources; 1998 nendo miriyo tanpakushitsugen kara no kinosei pepuchido no tansaku to seisan ni kansuru kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This project is aimed at promotion of effective utilization of unutilized resources by transforming histidine-containing peptide (anserine), enzymatically hydrolyzed muscle protein present in lean salmon swimming off the Sanriku District in the spawning season, into functional peptide. A reactor system, comprising an enzyme-immobilized column and rotary bioreactor, is investigated to efficiently produce peptide by enzymatically hydrolyzing the water-insoluble muscle protein. Anserine is isolated by ethanol extraction, ion-exchanging and partition chromatography. The TPTZ and ABTS methods are developed for speeding up measurement of the antioxidant activity. The salmon muscle protein is hydrolyzed by 3 types of enzymes, to measure the free radical erasing activity by the ABTS method. The enzymatically hydrolyzed protein is fractionated by gel permeation chromatography. The fractions having a molecular weight of 10,000 or less show strong antioxidant activity. The hydrolyzed protein shows improved activity by the iron rhodanide method when it has histidine at the center of tripeptide, and strong radical erasing function when it has thyrosine or tryptophan at the carboxyl terminal. (NEDO)

  1. Sterilization using ozone-ion gas sterilization using ozone-ion gas for mattresses used by the elderly; Ozone ion kunjoho ni kansuru kenkyu. Ozone ion kunjoho no zaitaku kaigoyo mattress mekkin eno oyo

    Energy Technology Data Exchange (ETDEWEB)

    Mikami, H.; Suzuki, A.; Hamasaki, H. [Shinryo Corp., Tokyo (Japan); Ishikawa, S.; Miyata, M.; Nanba, T. [Kitasato Univ., Tokyo (Japan); Sueyoshi, K. [Mitsubishi Research Institute Inc., Tokyo (Japan)

    1999-05-25

    The new generation of Japanese is facing an aging society: the number of young people is decreasing dramatically, while the number of elderly is increasing. Consequently, care for the elderly has become a big problem. One particular problem area we`ve investigated is the use of unclean mattresses by the bedridden elderly. These mattresses provide an all too excellent environments for the growth of microbes. We measured the density of microbes on the cover of mattresses at 775cfu/cm{sup 2} and in the bed filling at 136cfu/g. The dominant species of microbes were MRSA and Bacillus. We used MRSA, Bacillus subtilis and Escherichia coli as biological indicators and tested whether our system using ozone-ion fumigants was applicable for sterilization of mattresses. The survival ratio of MRSA were 10{sup -8} {approx} 10{sup -9}, 10{sup -7} {approx} 10{sup -8} for B. subtilis and below 10{sup -8} for E. coli. These experiments made it clear that our system is applicable for sterilization of the mattresses used by bedfast elderly. (author)

  2. Fiscal 1997 report on the results of the research on the development of high-performance industrial furnaces. Volume 2; 1997 nendo seika hokokusho (koseino kogyoro no kaihatsu ni kansuru kenkyu seika hokokusto)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    A R and D was conducted for the purpose of developing remarkable energy conservation/CO2 reduction technologies. In fiscal 1997, the five working groups about the following were formed to have animated discussions: the basic research, heating furnace, heat treatment furnace, melting furnace, and tubular heating furnace. The research subjects are the pursuit/deepening of the base study on flame structures in high temperature air combustion, critical heat recovery of the system in high temperature air combustion, examination of the basic common technology on the ultimate optimization of the material heat transfer, construction of general-purpose experimental database, setting-up of design standards for general-purpose high-performance industrial furnaces, presentation of examples of the actual trial design based on the design standards and feasibility study of the practical application, preparatory support of the field test project on high-performance industrial furnaces for commercialization/diffusion/spread, etc. Further, how to arrange the developmental results was studied to make the results of the project useful for study of the prompt commercialization. 442 refs., 1444 figs., 311 tabs

  3. Hierarchical NiO Superstructures/Foam Ni Electrode Derived from Ni Metal-Organic Framework Flakes on Foam Ni for Glucose Sensing

    International Nuclear Information System (INIS)

    Highlights: • A novel glucose sensor based on hierarchical NiO superstructures/foam Ni was achieved. • The resulted electrode was fabricated by pyrolyzing NiMOFs on foam Ni. • The carbon frame improved the electrical conductivity of the NiO superstructures/foam Ni electrode. • The as-prepared glucose sensor exhibited an excellent sensitivity, high stability and good selectivity. - Abstract: The detection of glucose has been attracting more and more attention. The present work provided a novel glucose sensor based on hierarchical NiO superstructures/foam Ni electrode. In this strategy, the foam Ni was chosen as a substrate to grow Ni metal-organic frameworks (NiMOFs) via “twin metal source” method, and then the hierarchical NiO superstructures/foam Ni electrode was constructed by pyrolyzing the corresponding NiMOFs/foam Ni electrode for the first time. The preparation process was carefully characterized by scanning electron microscopy, thermogravimetric analysis and X–ray powder diffraction. The results showed the NiMOFs on foam Ni electrode with morphology of the flakes. After the NiMOFs/foam Ni electrode was pyrolyzed, the hierarchical NiO superstructures/foam Ni electrode was formed and the hierarchical NiO superstructures uniformly embedded in three-dimensional carbon frameworks to enhance the electrical conductivity of hierarchical NiO superstructures. The electrocatalytic properties of hierarchical NiO superstructures/foam Ni electrode were investigated by cyclic voltammetry, amperometry and chronoamperometry. The novel glucose sensor showed a reasonable linear range of 0.018–1.2 mM and detection limit of 6.15 μM with a high sensitivity of 395 μA mmol−1. Such good result renders it promising candidate for routine testing

  4. Interdiffusion in the Ni/TD-NiCr and Cr/TD-NiCr systems

    Science.gov (United States)

    Pawar, A. V.; Tenney, D. R.

    1974-01-01

    The diffusion of Ni and Cr into TD-NiCr has been studied over the 900 to 1100 C temperature range. The diffusion couples were prepared by electroplating Cr and Ni on polished TD-NiCr wafers. Concentration profiles produced as a result of isothermal diffusion at 905, 1000, and 1100 C were determined by electron microprobe analysis. The Boltzmann-Matano analysis was used to determine concentration-dependent diffusion coefficients which were found to compare favorably with previously reported values. These data suggest that 2 vol % ThO2 distribution has no appreciable effect on the rates of diffusion in TD-NiCr with a large grain size. This supports the view that an inert dispersoid in an alloy matrix will not in itself lead to enhanced diffusion unless a short-circuit diffusion structure is stabilized.

  5. Studies on power augmentation of horizontal axis wind turbine with variable speed control. 2nd Report. Determination of optimum slip due to second-power torque control; Kahensoku unten ni yoru field suiheijiku fusha no koseinoka ni kansuru kenkyu. 2. Jijo torque seigyo ni yoru saiteki suberi no kettei

    Energy Technology Data Exchange (ETDEWEB)

    Shimizu, Y.; Takada, M.; Maeda, T. [Mie University, Mie (Japan). Faculty of Engineering; Kamikawa, H.; Marumo, T. [Mie University, Mie (Japan)

    1998-03-01

    An inverter-assisted variable speed power generation system is subjected to a field test and the optimum slip for optimum operation against changing wind velocities is determined. The system is a horizontal-axis wind turbine of the up-wind type provided with three variable-pitch blades. The rotor is 8.2m in diameter, the rotation axis is positioned 12.7m above the ground, and the output is rated at 8kW. The rotation of the rotor is multiplied nine times by a step-up gear using a timing belt, and drives the 8-pole/3-phase squirrel-cage 8kW induction generator whose rotation is rated at 900rpm. The generated AC power is converted into DC by transistors before being charged into storage batteries. In the experiment, power is generated at variable speeds using the inverter and four types of second-power torque control are tested, different from each other in the magnitude of slips. After an overall evaluation of the amount of generated power and system efficiency, it is found that a slip of -2.0% is the optimum for the control of power generation in this type of wind turbine. 1 ref., 8 figs.

  6. Research on the summer type wall inside of the body dew in the air-conditioning time (2). Numerical value analysis by the two-dimensional model and precision verification; Reiboji ni okeru natsugataheki tainai ketsuro ni kansuru kenkyu (2). 2 jigen moderu ni yoru suchi kaiseki oyobi keido kensho

    Energy Technology Data Exchange (ETDEWEB)

    Saito, Hiroaki. [Testing Center for Construction Materials. Tokyo (Japan); Tsuchiya, Takao.

    1999-07-01

    The outline could grasp the tendency of every method of construction related to the damp nature of the wall inside of the body part by doing a laboratory experiment for the wall body model in the artificial climate room which reproduced the outside environment of summer. This time, the numerical value calculation which this heat water time movement equation was used for is examined about the action, the utility of the calculation by using the data which could get it more for the actual measurement, and nature of each member which composes a wall body is grasped, and it aims at explaining the mechanism of the summer pattern. As for the influence on a result of a calculation by modeling as well, a consideration is added again. (NEDO)

  7. Study on behavior of car and driver in the very small commuter car made of FRP during collision using scale model. Under the consideration of thorax deformation of driver using airbag; FRP sei mokei ni yoru FRP sei chokeiryo jissha shototsuji no kuruma to join no anzensei ni kansuru kenkyu. Kyobu henkei tokusei wo yusuru join ni taisuru air gab no koka

    Energy Technology Data Exchange (ETDEWEB)

    Sakai, H.; Morisawa, M.; Yoshino, T. [Musashi Institute of Technology, Tokyo (Japan); Sato, T. [Keio University, Tokyo (Japan); Ishizuki, H. [Satake Co., Tokyo (Japan)

    1997-10-01

    In this study, after having performed simulation which took up scale models substituting for full scale model of commuter car made of FRP, we carried out collision tests to barrier. Here, we made enquiries about the occupant safety by changing the collision speed and the deformation characteristics of the seat belt, during head-on barrier collision using one-fifth scale models. We sought for the occupant`s safe combinations among the deformation characteristics of airbag and the thorax deformation. In this case, the degree of the occupants injury were estimated using HIC values, 3msecG and maximum deformation of the thorax. 7 refs., 5 figs.

  8. 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)

    1996-12-31

    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.

  9. 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

    1996-12-31

    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.

  10. The Ni-YSZ interface

    DEFF Research Database (Denmark)

    Jensen, Karin Vels

    The anode/electrolyte interface in solid oxide fuel cells (SOFC) is known to cause electrical losses. Geometrically simple Ni/yttria-stabilised zirconia (YSZ) interfaces were examined to gain information on the structural and chemical changes occurring during experiments at 1000°C in an atmosphere...... content (99.8% Ni and 99.995% Ni) were used to examine the impact of impurities on the polarisation resistance and contact area morphology. The electropolished nickel wires were pressed against a polished 8 mol% YSZ surface. Extensive structural changes from a flat interface to a hill and valley structure...

  11. Domain Structures and Anisotropy in Exchange-coupled [Co/Pd]-NiFe and [Co/Ni]-NiFe Multilayers

    Science.gov (United States)

    Tryputen, Larysa; Chung, Sunjae; Mohseni, Majid; Nguyen, T. N. Anh; Åkerman, Johan; Guo, Feng; McMichael, Robert D.; Ross, Caroline A.

    2014-03-01

    Exchange-coupled multilayers [Co/Pd]5-/NiFe and [Co/Ni]4-NiFe with strong perpendicular magnetic anisotropy have been proposed to use in spin-torque switching and oscillators devices with tilted fixed and free layer to improve their functional performance. We present an experimental study of the magnetization behavior of [Co/Pd]5-/NiFe and [Co/Ni]4-NiFe multilayers measured using magnetometry, magnetic force microscopy (MFM) and ferromagnetic resonance (FMR) as a function of the thickness of the top NiFe layer. We varied the thickness of the NiFe layer in [Co/Pd]5-NiFe (t), t = 0 - 80 nm and [Co/Ni]4-NiFe (t), t = 0.5 - 2.5 nm in order to study the interplay between perpendicular magnetization of the Co/Pd or Co/Ni multilayers and in-plane magnetization of the NiFe. Our magnetometry and FMR data suggest that the [Co/Ni]4/NiFe multilayer behaves like a homogeneous ferromagnetic film with anisotropy that reorients towards in-plane as the NiFe thickness increases, whereas the [Co/Pd]5/NiFe multilayer reveals more complex behavior in which the [Co/Pd] layer retains out-of-plane anisotropy while the magnetization of NiFe layer tilts in-plane with increasing thickness. MFM showed that domains with ~0.1 +/-m size were visible in [Co/Pd]-/NiFe with NiFe thickness of 20-80 nm. Multilayers were patterned into sub-100 nm dots using ion beam etching and their magnetization behavior are compared with unpatterned films.

  12. Measurement of 59Ni and 63Ni by accelerator mass spectrometry at CIAE

    Science.gov (United States)

    Wang, Xiaoming; He, Ming; Ruan, Xiangdong; Xu, Yongning; Shen, Hongtao; Du, Liang; Xiao, Caijin; Dong, Kejun; Jiang, Shan; Yang, Xuran; Lan, Xiaoxi; Wu, Shaoyong; Zhao, Qingzhang; Cai, Li; Pang, Fangfang

    2015-10-01

    The long lived isotopes 59Ni and 63Ni can be used in many areas such as radioactive waste management, neutron dosimetry, cosmic radiation study, and so on. Based on the large accelerator and a big Q3D magnetic spectrometer, the measurement method for 59Ni and 63Ni is under development at the AMS facility at China Institute of Atomic Energy (CIAE). By using the ΔE-Q3D technique with the Q3D magnetic spectrometer, the isobaric interferences were greatly reduced in the measurements of 59Ni and 63Ni. A four anode gas ionization chamber was then used to further identify isobars. With these techniques, the abundance sensitivities of 59Ni and 63Ni measurements are determined as 59Ni/Ni = 1 × 10-13 and 63Ni/Ni = 2 × 10-12, respectively.

  13. Ni4Ti3 precipitate structures in Ni-rich NiTi shape memory alloys

    Czech Academy of Sciences Publication Activity Database

    Holec, David; Bojda, Ondřej; Dlouhý, Antonín

    2008-01-01

    Roč. 481, Sp. Iss. (2008), s. 462-465. ISSN 0921-5093. [ESOMAT 2006. Bochum, 10.09.2006-15.09.2006] R&D Projects: GA ČR(CZ) GA106/05/0918 Institutional research plan: CEZ:AV0Z20410507 Keywords : NiTi shape memory alloy s * Ni4Ti3 precipitates * Multi-step martensitic transformations Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.806, year: 2008

  14. Thermodynamic reassessment of Gd–Ni system

    Energy Technology Data Exchange (ETDEWEB)

    Rahou, Z., E-mail: rahou.zakarea@gmail.com; Mahdouk, K.

    2015-11-05

    By means of CALPHAD (CALculation of PHAse Diagrams) approach, the phase diagram and thermodynamic data of the Gd–Ni system were critically assessed. The Gd–Ni system contains four solution phases (liquid, face-centered cubic FCC-A1, body-centered cubic BCC-A2 and hexagonal close-packed HCP-A3) modeled with the Redlich-Kister polynomials and seven intermetallic compounds Gd{sub 3}Ni, GdNi, GdNi{sub 2}, GdNi{sub 3}, Gd{sub 2}Ni{sub 7}, GdNi{sub 5} and Gd{sub 2}Ni{sub 17}, which are all treated as stoichiometric compounds. A set of self-consistent thermodynamic parameters describing various phases in this binary system was obtained. The phase diagram and thermodynamic quantities calculated from assessed parameters agree well with experimental data.

  15. Submicron particles of Co, Ni and Co–Ni alloys

    Indian Academy of Sciences (India)

    P Saravanan; T A Jose; P John Thomas; G U Kulkarni

    2001-10-01

    Magnetic sub-micron sized particles (with diameters in the range 100–600 nm) of Co, Ni and Co–Ni alloys, protected with polyvinylpyrrolidone have been prepared in gram quantities using the polyol process. Experiments carried out with different metal precursors and starting compositions have yielded reliable routes to produce particles of the desired diameters in the 100–600 nm range. The particles were characterized with X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, thermogravimetric analysis and magnetic measurements. The particles are found to be stable under ambient conditions indefinitely. The coercivity values of the Co and Ni particles are ∼ 50% higher compared to the corresponding bulk values. The alloy particles follow a trend similar to the bulk alloys.

  16. Ni putes ni soumises. Media and women with other gender?

    OpenAIRE

    THIÉBLEMONT Sylvie

    2014-01-01

    Since 2000, new women's movements emerge like Ni putes ni soumises (NPNS) who give a new approach to activism: not the one on feminists in the classi- cal sense of the term with the connotations it carries, but women carrying claims in the media and through the media on the living conditions of the residents of the suburbs. So, many media will take part in the mediatization of NPNS and its dis-courses, and will serve in some way as a place of “factory” for the public opinion.

  17. Effects of plate thickness on reverse martensitic transformation of prestrained NiTi/NiTi alloy

    Institute of Scientific and Technical Information of China (English)

    YAN Zhu; CUI Lishan; ZHENG Yanjun

    2007-01-01

    In this Paper, differential scanning calorimeter (DSC)was used to study the effects of predeformation and plate thickness on the reverse martensitic transformation of explosively welded NiTi/NiTi alloy.Results showed that there was a constraint between Ni50.4Ti(NiTi-1)and Ni49.8Ti (NiTi-2),which led to that the thickness of NiTi-1 or NiTi-2 strongly affected the reverse martensitic transformation behavior because residual stress variations in thickness wound enable bias force to be built inside the composite.The DSC measurements showed that after deformation,the reverse martensitic transformation temperature of the composite was increased with the increasing thickness of NiTi-2.Also.the XRD results revealed that the microstructure of NiTi/NiTi alloy changed from B2 phase to B19'phase along the thickness direction.

  18. nière's Disease

    Science.gov (United States)

    ... can control their vertigo with diet, drugs, or devices. However, a small group of people with Ménière’s disease will get relief only by undergoing surgery. What research about Ménière’s ...

  19. Laser welding of TiNi shape memory alloy and stainless steel using Ni interlayer

    International Nuclear Information System (INIS)

    Highlights: ► Laser welding was achieved using Ni interlayer between TiNi SMA and stainless steel. ► Ni interlayer thickness has great effects on joint microstructure and properties. ► Increasing Ni interlayer thickness results in increasing γ-Fe phase in weld metals. ► Excessive addition of Ni results in forming more TiNi3 and pores in the weld metals. ► Suitable Ni interlayer thickness improves the joint quality. -- Abstract: Laser welding of TiNi shape memory alloy wire to stainless steel wire using Ni interlayer was investigated. The results indicated that the Ni interlayer thickness had great effects on the chemical composition, microstructure, gas-pore susceptibility and mechanical properties of laser-welded joints. With an increase of Ni interlayer thickness, the weld Ni content increased and the joint properties increased due to decreasing brittle intermetallic compounds (TiFe2 and TiCr2). The joint fracture occurred in the fusion zone with a brittle intermetallic compound layer. The tensile strength and elongation of the joints reached the maximum values (372 MPa and 4.4%) when weld Ni content was 47.25 wt.%. Further increasing weld Ni content resulted in decreasing the joint properties because of forming more TiNi3 phase, gas-pores and shrinkage cavities in the weld metals. It is necessary to select suitable Ni interlayer thickness (weld composition) for improving the mechanical properties of laser-welded joints.

  20. CONFIGURATION-INTERACTION IN NI METAL AND NI-ALLOYS AND HIGH-ENERGY SPECTROSCOPY

    NARCIS (Netherlands)

    TANAKA, A; JO, T; SAWATZKY, GA

    1992-01-01

    We discuss the electronic state of Ni atoms in Ni metal and of Ni impurity in Cu and Au metals from the viewpoint of 3d configuration interaction (CI) using the Anderson impurity model including atomic multiplets. On the basis of the discussion, we give an interpretation for the Ni 2p-core X-ray pho

  1. Revisiting El Niño Modokis

    Science.gov (United States)

    Marathe, Shamal; Ashok, Karumuri; Swapna, P.; Sabin, T. P.

    2015-12-01

    The suggestion that there exist two types of El Niño in the tropical Pacific has generated a debate in the community. Applying various linear and non-linear approaches and composite analysis technique on observed and reanalyzed climate datasets primarily for the 1950-2010 period, we revisit the variability of the tropical Pacific in the light of this debate. Our objective is to examine whether the proposed El Niño Modokis need a classification distinct from canonical El Niños. Even if the distinction is subject to short data records, we demonstrate that the El Niño Modoki events indeed display a seasonal evolution and teleconnections different from the canonical El Niños, and that the distinction is not subject to inclusion of the two extreme El Niños 1982 and 1997 as canonical El Niños. We show that the El Niño Modoki events are not an artifact associated with the orthogonality constraint associated with the EOF technique. Our cluster analysis shows that evolutions of the canonical El Niño and El Niño Modokis through various seasons differ from one another. Importantly, the dynamic and thermodynamic air-sea coupling strength is distinctly different between the El Niño Modoki and the canonical El Niño events. We find that, dynamic feedback intensity is stronger for El Niño Modoki (canonical El Niño) during boreal summer (winter); though the air-sea coupling strength, a major contributor to Bjerknes feedback, is maximum for Modokis during the developing stages, it decreases thereafter. In case of thermodynamic feedback intensity, SST-wind-evaporation feedback is dominant for El Niños while SST-SHF feedback is important during El Niño Modokis. However, we find that the thermodynamic feedback values significantly differ across the flux datasets.

  2. Density of Liquid Ni-Cr Alloy

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    The density of liquid Ni-Cr alloy was measured by a modified sessile drop method. The density of liquid Ni-Cr alloywas found to decrease with increasing temperature and Cr concentration in the alloy. The molar volume of liquidNi-Cr alloy increases with increasing the Cr concentration in the alloy. The molar volume of Ni-Cr alloy determinedin the present work shows a positive deviation from the linear molar volume.

  3. NiSn and porous NiZn coatings for water electrolysis

    Energy Technology Data Exchange (ETDEWEB)

    Santos, M.B.F.; Peres da Silva, E.; Andrade, R. Jr.; Dias, J.A.F. (Universidade Estadual de Campinas, SP (BR). Lab. de Hidrogenio)

    1992-01-01

    Porous Ni(Zn) coatings are prepared from the electrodeposition of NiZn alloys followed by chemical leaching in KOH solution. A pyrophosphate bath is used to electrodeposit NiSn alloys (14-84 at.% Sn). Polarization curves for hydrogen and oxygen evolution reactions in 28 wt% KOH solutions at 70{sup o}C are presented for selected Ni(Zn) and NiSn coatings. The electrocatalytic activity of a Ni(Zn) porous anode is maintained after 850 h of electrolysis, whereas the NiSn cathode loses its properties. (author).

  4. Recycling Ni from Contaminated and Mineralized Soils.

    Science.gov (United States)

    Rare plant species accumulate potentially valuable concentrations of some metals. Alyssum murale readily accumulates over 2% Ni in aboveground dry matter when grown on Ni-mineralized serpentine soils in Oregon, allowing production of “hay” biomass with at least 400 kg Ni ha-1 with low levels of fer...

  5. Reaction of amorphous Ni-W and Ni-N-W films with substrate silicon

    Science.gov (United States)

    Zhu, M. F.; Suni, I.; Nicolet, M.-A.; Sands, T.

    1984-01-01

    Wiley et al. (1982) have studied sputtered amorphous films of Nb-Ni, Mo-Ni, Si-W, and Si-Mo. Kung et al. (1984) have found that amorphous Ni-Mo films as diffusion barriers between multilayer metallizations on silicon demonstrate good electrical and thermal stability. In the present investigation, the Ni-W system was selected because it is similar to the Ni-Mo system. However, W has a higher silicide formation temperature than Mo. Attention is given to aspects of sample preparation, sample characterization, the interaction between amorphous Ni-W films and Si, the crystallization of amorphous Ni(36)W(64) films on SiO2, amorphous Ni-N-W films, silicide formation and phase separation, and the crystallization of amorphous Ni(36)W(64) and Ni(30)N(21)W(49) layers.

  6. Strukturelle studier av deuterider for Y3Ni6Al2, LaNiSn og NdNiSn

    OpenAIRE

    2007-01-01

    I det foreliggende hovedfagsarbeidet er hydrider av tre intermetalliske faser; Y3Ni6Al2, LaNiSn og NdNiSn studert med hensyn på strukturkjemi og absorpsjon-desorpsjon egenskaper. Arbeidet med Y3Ni6Al2 og dets deuterider viste seg å bli vanskelig da det forelå ett to-fase produkt.. Relative akselengder for de to fasene (med antatt formel Y3Ni6Al2D9) etter raffinering av PND data tilsier at det kan være noe galt med de foreslåtte modellene i forhold til deres enhetscellevolum og deuterium...

  7. Structural evaluation and nonlinear optical properties of Ni/NiO, Ni/NiCo2O4 and Co/Co3O4 nanocomposites

    International Nuclear Information System (INIS)

    Nanocomposites of Ni/NiO, Ni/NiCo2O4 and Co/Co3O4 have been synthesized by a chemical reduction technique. X-ray diffraction (XRD) and transmission electron microscopy (TEM) images confirm the mixed composite nature of the sample and uniform particle size of approximately 13 nm. Formation of Ni/NiCo3O4 solid solution or NiCo2O4 spinel phase in the mixed composite is confirmed by energy dispersive X-ray (EDX) spectrum. Magnetic hysteresis (M–H) curves of the nanocomposites show excellent ferromagnetic (FM) nature at room temperature. Nonlinear optical transmission of the nanocomposites is measured using the open aperture Z-scan technique employing 7 nanosecond laser pulses at 532 nm. Experimental results show that NiO/NiO–Co3O4/Co3O4 nanocomposites exhibit good optical limiting performance. From the measurements and numerical fitting of the data to theory, it is found that nonlinear absorption has contributions from excited state absorption and two-photon absorption. Optical limiting is enhanced in Co3O4 and Ni/NiCo2O4 in which the Co3O4 content has a larger volume ratio.

  8. First-principles calculations for the elastic properties of Ni-base model superalloys:Ni/Ni_3Al multilayers

    Institute of Scientific and Technical Information of China (English)

    Wang Yun-Jiang; Wang Chong-Yu

    2009-01-01

    A model system consisting of Ni[001](100)/Ni_3Al[001](100)multi-layers are studied using the density functional theory in order to explore the elastic properties of single crystal Ni-based superalloys. Simulation results are consistent with the experimental observation that rafted Ni-base superalloys virtually possess a cubic symmetry. The convergence of the elastic properties with respect to the thickness of the multilayers are tested by a series of multilayers from 2γ'+2γto 10γ'+10γ atomic layers. The elastic properties axe found to vary little with the increase of the multilayer's thickness. A Ni/Ni_3Al multilayer with 10γ'+10γatomic layers(3.54 nm)can be used to simulate the mechanical properties of Ni-base model superalloys. Our calculated elastic constants, bulk modulus, orientation-dependent shear modulus and Young's modulus. as well as the Zener anisotropy factor are all compatible with the measured results of Ni. base model superalloys R1 and the advanced commercial superalloys TMS-26.CMSX-4 at a low temperature. The mechanical properties as a function of the γ' phase volume fraction are calculated by varying the proportion of theγ andγ'phasein the multilayers. Besides, the mechanical properties of two-phase Ni/Ni_3A1 multilayer call be well predicted by the Voigt-Reuss-Hill rule of mixtures.

  9. Flowsheet for 63Ni production

    International Nuclear Information System (INIS)

    The production of large quantities of high specific activity 63Ni (>10Ci/g) requires both a highly enriched 62Ni target and a long irradiation period at high neutron flux. Trace impurities in the nickel and associated target materials are also activated and account for a significant fraction of the discharged activity and essentially all of the gamma activity. While most of these undesirable activation products (mainly transition metals) can be easily removed as chloride complexes during anion exchange, chromium, present as 51Cr, and manganese, present as 54Mn, are exceptions and require solvent extraction of the in-cell product to achieve the desired purity. In addition to summarizing the current development and production experience, optimized flowsheets are discussed

  10. Manufacture of Raney Ni catalyst with metastable Ni2Al3 by high—energy milling

    Institute of Scientific and Technical Information of China (English)

    滕荣厚; 马如璋; 等

    1999-01-01

    The Ni-Al alloy containing Cr,Fe additives were prepared as Raney Ni Catalyst by high energy milling.The size and surface state of Ni-Al alloy powder were studied by particle size analyzer and sanning electron microscopy.the Structure was analyzed by XRD and Moessbauer methods.The results showed that after a high-energy milling(HEM).the Ni-Al alloy transforms to a nano-scale NiAl structure with rich Al.By annealing the alloy,a metastable Ni2Al3 phase can be obtained.

  11. Manufacture of Raney Ni catalyst with metastable Ni2Al3 by high-energy milling

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    The Ni-Al alloy containing Cr, Fe additives were prepared as Raney Ni catalyst by high energy milling. The size and surface state of Ni-Al alloy powder were studied by particle size analyzer and sanning electron microscopy, the structure was analyzed by XRD and Mossbauer methods. The results showed that after a high-energy milling (HEM), the Ni-Al alloy transforms to a nano-scale NiAl structure with rich Al. Byannealing the alloy, a metastable Ni2Al3 phase can be obtained.

  12. Exclusive study of Ni+Ni and Ni+Au central collisions: phase coexistence and spinodal decomposition; Etude exclusive des collisions centrales Ni+Ni et Ni+Au: coexistence de phase et decomposition spinodale

    Energy Technology Data Exchange (ETDEWEB)

    Guiot, B

    2002-12-01

    The INDRA multidetector allowed us to study the Ni+Ni collisions at 32A MeV and the Ni+Au collisions at 52,4 MeV. Central collisions leading to 'quasi-fused' systems were isolated using multidimensional analysis techniques: the Discriminant Analysis and the Principal Component Analysis. Comparison with a statistical model shows that the selected events are compatible with thermodynamical equilibrium. The average thermal excitation energy is 5A MeV for both systems. Calculations of heat capacities show that the deexcitation of the hot sources are akin to a liquid-gas phase transition of nuclear matter. Indeed heat capacities exhibit a negative branch as expected for a phase transition of a finite system. The dynamics of this phase transition has been investigated by applying the charge correlation method. An enhanced production of events with equal-sized fragments has been evidenced for Ni+Au at 52A MeV. No signal was found for Ni+Ni at 32A MeV. Finally this method was improved by taking into account the total charge conservation. The signal is seen more clearly for Ni+Au at 52A MeV, but is ambiguous for Ni+Ni at 32A MeV. The path followed in the state diagram, or the involved time scales, seem to be different for these systems. (authors)

  13. Measured Activities of Al and Ni in gamma-(Ni) and gamma'-(Ni)3Al in the Ni-Al-Pt System

    Science.gov (United States)

    Copland, Evan

    2007-01-01

    Adding Pt to Ni-Al coatings is critical to achieving the required oxidation protection of Ni-based superalloys, but the nature of the Pt effect remains unresolved. This research provides a fundamental part of the answer by measuring the influence of Pt on the activities of Al and Ni in gamma-(Ni), gamma prime-(Ni)3Al and liquid in the Ni-Al-Pt system. Measurements have been made at 25 compositions in the Ni-rich corner over the temperature range, T = 1400-1750 K, by the vapor pressure technique with a multiple effusion-cell mass spectrometer (multi-cell KEMS). These measurements clearly show adding Pt (for X(sub Pt) less than 0.25) decreases a(Al) while increasing a(Ni). This solution behavior supports the idea that Pt increases Al transport to an alloy / Al2O3 interface and also limits the interaction between the coating and substrate alloys in the gamma-(Ni) + gamma prime-(Ni)3Al region. This presentation will review the progress of this study.

  14. Comparison of the thermal stabilities of NiSi films in Ni/Si, Ni/Pd/Si and Ni/Pt/Si systems

    CERN Document Server

    Wang, R N

    2003-01-01

    The effects of different interlayer materials (Pd and Pt) deposited between Ni films and Si substrates on the NiSi thermal stability are discussed. Ni sub 0 sub . sub 9 sub 4 sub 3 Pd sub 0 sub . sub 0 sub 5 sub 7 Si and Ni sub 0 sub . sub 9 sub 4 sub 5 Pt sub 0 sub . sub 0 sub 5 sub 5 Si solid solutions were formed when the samples were annealed at high temperatures and the lattice parameters of Ni sub 0 sub . sub 9 sub 4 sub 3 Pd sub 0 sub . sub 0 sub 5 sub 7 Si were calculated according to Vegard's law. The NiSi thermal stability was enhanced by interposing a Pd or Pt interlayer, and the sample with the Pt interlayer had the highest NiSi thermal stability among all the samples studied. This is attributed to the reduction of the interface energy between NiSi and Si substrates and the decrease of the driving force for the nucleation of NiSi sub 2 , induced by formation of the NiSi(200) preferred orientation and the solid solution respectively.

  15. Magnetic Properties of Grain Boundaries of Nanocrystalline Ni and of Ni Precipitates in Nanocrystalline NiCu Alloys

    Energy Technology Data Exchange (ETDEWEB)

    Wolf, H.; Guan, Z.; Li, X.; Wichert, Th. [Universitaet des Saarlandes, Technische Physik (Germany)

    2001-11-15

    Perturbed {gamma}{gamma}-angular correlation spectroscopy (PAC) was used to investigate nanocrystalline Ni and NiCu alloys, which are prepared by pulsed electrodeposition (PED). Using diffusion for doping nanocrystalline Ni with {sup 111}In four different ordered grain boundary structures are observed, which are characterized by unique electric field gradients. The incorporation of {sup 111}In on substitutional bulk sites of Ni is caused by moving grain boundaries below 1000 K and by volume diffusion above 1000 K. The nanocrystalline NiCu alloys prepared by PED are microscopically inhomogeneous as observed by PAC. In contrast, this inhomogeneity cannot be detected by X-ray diffraction. The influence of the temperature of the electrolyte, the current density during deposition, and the optional addition of saccharin to the electrolyte on the homogeneity of nanocrystalline NiCu alloys was investigated.

  16. Ultrafast Alkaline Ni/Zn Battery Based on Ni-Foam-Supported Ni3S2 Nanosheets.

    Science.gov (United States)

    Hu, Pu; Wang, Tianshi; Zhao, Jingwen; Zhang, Chuanjian; Ma, Jun; Du, Huiping; Wang, Xiaogang; Cui, Guanglei

    2015-12-01

    Self-supported Ni3S2 ultrathin nanosheets were in situ formed by direct sulfurization of commercially available nickel foam using thioacetamide as sulfur source under hydrothermal process. The morphology and structure of the as-obtained sample were analyzed by using XRD, XPS, SEM, and TEM, revealing that an ultrathin nanosheets Ni3S2 were grown on the surface of Ni form. The as-obtained Ni3S2/Ni composite with uniform architecture was used as cathode material for alkaline Ni/Zn battery, which delivered high capacity of 125 mAh g(-1) after 100 cycles with no obvious capacity fading, extraordinary rate capability (68 mAh g(-1) at the current density of 5.0 A g(-1)), and high operating voltage (1.75 V). PMID:26599523

  17. Magnetic Properties of Grain Boundaries of Nanocrystalline Ni and of Ni Precipitates in Nanocrystalline NiCu Alloys

    International Nuclear Information System (INIS)

    Perturbed γγ-angular correlation spectroscopy (PAC) was used to investigate nanocrystalline Ni and NiCu alloys, which are prepared by pulsed electrodeposition (PED). Using diffusion for doping nanocrystalline Ni with 111In four different ordered grain boundary structures are observed, which are characterized by unique electric field gradients. The incorporation of 111In on substitutional bulk sites of Ni is caused by moving grain boundaries below 1000 K and by volume diffusion above 1000 K. The nanocrystalline NiCu alloys prepared by PED are microscopically inhomogeneous as observed by PAC. In contrast, this inhomogeneity cannot be detected by X-ray diffraction. The influence of the temperature of the electrolyte, the current density during deposition, and the optional addition of saccharin to the electrolyte on the homogeneity of nanocrystalline NiCu alloys was investigated.

  18. Consideration about heat range of spark plug (the second). ; Influence on pre-ignition when alcohol blend ratio, A/F, boost pressure changed. Spark plug no netsu han prime i ni kansuru ichikosatsu. 2. ; Alchol kongo wariai, kunenhi, kakyu joken no pre-ignition ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Naganuma, N.; Nishio, K.; Yamada, S. (NGK Spark Plug Co. Ltd., Aichi (Japan))

    1990-04-25

    In methanol blended gasoline fuel, the influences of a methanol blend ratio, air/fuel (A/F) ratio and boost pressure on pre-ignition were examined using improved commercial automobile four-cylinders engines. Since the pre-ignition temperature was lowered as ignition timing approached a top dead center, the pre-ignition temperature, essentially lower than that in gasoline fuel, was increasingly lowered with ignition timing. The pre-ignition temperature reached the bottom at an excess air ratio of 0.9 accompanied by the maximum engine output, and was also lowered with an increase in boost pressure. On the other hand, a slim insulator type spark plug with less heat capacity efficiently depressed the pre-ignition. In order to ensure the same pre-ignition resistance as gasoline fuel, it was required to use a suitable spark plug with higher heating value in the case of some given engine specification. 1 ref., 9 figs., 1 tab.

  19. FY 2000 Medical/engineering cooperative research project. Basic research on high-sensitivity gene-aided diagnostic systems for cancers, based on free DNA in blood; 2000 nendo kecchu yuri DNA ni yoru gan no kokando idenshi shindan system ni kansuru kiban kenkyu jisseki hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    The research and development project is conducted to develop new methods directly related to early discovery of potential cancer patients, and the FY 2000 results are reported. The FY 2000 efforts are directed to improvement of intra-Alu-PCR method as the superhigh-sensitivity quantitative method, almost established in the previous fiscal year, to have higher reliability and simplicity suitable for automatic diagnosis. It is concluded that (there is no difference of significance between normal persons and cancer patients in free DNA concentration in the blood, determined by the Boyle/intra-Alu-PCR method), but this method is confirmed to be useful for prognostic monitoring of the patients who have the marrow or peripheral vessel cell transplant. Detection of qualitative gene abnormality of DNA in the peripheral vessels is investigated using the K-ras, p53 gene. Certain results are obtained by the MSA method for the former, and by the newly introduced WAVE DNA fragment analysis system for the latter. However, there are still a number of problems to be solved before these methods are applicable to screening for general medical examinations. The research on the (analysis of gene abnormality of cancer itself) has made a notable progress. (NEDO)

  20. FY 2000 Report on the results of the research work on the development trends of natural gas conversion technologies into liquefied fuel in Russia; 2000 nendo Roshia ni okeru tennen gas no ekitai nenryoka gijutsu no kaihatsu doko nado ni kansuru chosa kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Described herein are the FY 2000 results of the experimental studies on making Fischer-Tropsch (FT) synthesis catalysts on a trial basis and their commercialization feasibility, aimed at producing liquefied fuels in Russia. Irkutsk State University is developing the 'Fischer-Tropsh synthesis catalysts for motor fuel production.' It is found that n-alkanes as the diesel fuel component is formed on the Co-{gamma}-Al{sub 2}O{sub 3} catalyst improved mainly by the first transition metals. Possibility is demonstrated that the synthesis gas can be directly converted into the hydrocarbons containing a high proportion of isoalkanes by the process which uses a combination of FT synthesis catalyst and zeolite catalyst. Topchiev Institute of Petrochemical Synthesis is developing the 'catalysts for synthesis of fuel hydrocarbons from the nitrogen-diluted synthesis gas.' It is confirmed by the FT synthesis reaction test with the diluted synthesis gas as the starting material that the fused iron and zeolite components for the binary catalyst, selected as the promising catalyst for production of gasoline fuel, are stable for extended periods of 3 months or longer. (NEDO)

  1. Achievement report for fiscal 1998 on Simple Operation Type CAD/CAM System Development through International Cooperation; 1998 nendo 'kan'i sosagata denshi sekkei seian shien system no kaihatsu ni kansru kenkyu kyoryoku' ni kansuru hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    The subject project is implemented in the fields of automobiles and their parts, electrical home appliances and their parts, and textile and apparel. In the field of automobiles and their parts, a prototype is developed of an integrated information management system which is to serve between corporation head offices and assembling businesses overseas, and another prototype is developed of an inter-business technical data serving system which is to serve between overseas assembling businesses and supporting businesses, both involving Japan, Indonesia, and Thailand. In the field of electrical home appliances and their parts, a prototype is developed of an electronic catalog system in a joint endeavor with research institutes of Indonesia, Malaysia, Singapore, and Thailand, and a demonstration test is conducted. A design concurrent engineering system is developed by Japan and Malaysian research institutes. In the field of textile and apparel, prototypes are developed, by Japanese, Chinese, and Indonesian apparel manufactures, of an apparel manufacturing specification system, international EDI (electronic data interchange) system, translation system, and a CAD (computer-aided design)/CAM (computer-aided manufacturing) data interchange system. (NEDO)

  2. FY 2000 research cooperation project on the comprehensive research cooperation for environmental technology. Research cooperation for technology for prevention of the water pollution caused by plant waste water in Vietnam; 2000 nendo kenkyu kyoryoku jigyo. Kankyo gijutsu sogo kenkyu kyoryoku (Betonamu koku kojo haisui ni yoru suishitsu osen boshi taisaku gijutsu ni kansuru kenkyu hokoku)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    For the purpose of increasing the research capability of the Center for Consultancy, Training and Technology Transfer in Vietnam, research cooperation for prevention of water pollution was given for plants of the local industry located in the suburbs of Hanoi city. In the survey of the actual state of the water pollution in the industrial area in the suburbs of Hanoi city, the following was found out: In the area, approximately 110 companies of the production industry such as livestock feed, papermaking, dyeing, brewing, construction materials, etc. are in operation and are discharging the untreated waste water into rivers and waterways because waste water treatment facilities are not prepared yet. In this research cooperation, the following were carried out: detailed survey of specified plants and proposal for improvement, training of Vietnamese researchers/engineers in charge of water pollution prevention technology, invitation to/training at Japan of Vietnamese managers/researchers, seminar to be held on the site, equipment to be given that is needed to measure water quality. The equipment to be given is a portable multi-item water quality meter and analytical equipment such as spectrometer, atomic absorption spectrophotometer and gas chromatograph. (NEDO)

  3. Experimental model for architectural systematization and its basic thermal performance. Part 1. Research on architectural systematization of energy conversion devices; Kenchiku system ka model no gaiyo to kihon seino ni tsuite. 1. Energy henkan no kenchiku system ka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Sunaga, N.; Ito, N.; Kimura, G.; Fukao, S.; Shimizu, T.; Tsunoda, M.; Muro, K. [Tokyo Metropolitan University, Tokyo (Japan)

    1996-10-27

    The outline of a model for architectural systematization of natural energy conversion and the experiment result on the basic thermal performance in winter are described. The model is about 20 m{sup 2} in floor space. Foam polystyrene of 100 mm and 200 mm thick was used for the outer wall as heat insulating materials. The model has a solar battery and air conditioner and uses red brick as a heat reservoir. An experiment was made on seven modes obtained when three elements (heating, heat storage, and night insulated door) are combined. The information obtained by the experiment showed that a model for architectural systematization has high heat insulation and tightness and can be used as an energy element or an evaluation model for architectural systematization. In this model for architectural systematization, the power consumption of an air conditioner in winter can be fully supplied by only the power generation based on a solar battery. In an architectural element, the heating energy consumption can be remarkably reduced and the indoor thermal environment can be greatly improved, by the combination of a heat reservoir and night heat insulated door. 1 ref., 6 figs., 3 tabs.

  4. Annual cycle solar energy utilization with seasonal storage. Part 7. Examination on design and control of the system partially recovering exhaust heat of heat pump; Kisetsukan chikunetsu ni yoru nenkan cycle taiyo energy riyo system ni kansuru kenkyu. 7. Bubuntekina hainetsu kaishu wo koryoshita baai no sekkei seigyoho no kento

    Energy Technology Data Exchange (ETDEWEB)

    Tanaka, H.; Okumiya, M. [Nagoya University, Nagoya (Japan)

    1996-10-27

    The capacity and performance of the existing system that recovers the overall heating and cooling exhaust heat completely into a seasonal storage tank and the system that discharges the exhaust heat slightly to the outside and recovers it partially were compared and investigated. The system uses a central single-duct discharge system as an air-conditioning system. A heat pump and a flat-plate solar collector installed on the roof of a building are used as the heat source. The seasonal storage tank in the ground just under the building is a cylindrical water tank of 5 m deep with the concrete used as body. The upper surface of a storage tank is heat-insulated by a stylo-platform of 200 mm, and the lower side surface by a stylo-platform of 100 mm. Calculation when the difference in temperature used in a seasonal storage tank is set to 35{degree}C and 25{degree}C was performed for the system that has two control methods. The overall exhaust heat recovery system is almost the same in energy performance as the partial exhaust heat recovery system. The partial exhaust heat recovery system is more advantageous on the economic side. 4 refs., 6 figs., 3 tabs.

  5. Recent energy situation in the U.S. and Europe. Trend of discussions on energy safety security and energy policies in the E.U. and CIS (commonwealth of independent states) countries; Obei ni okeru saikin no energy jijo. Energy anzen hosho ni kansuru giron no doko to EU oyobi CIS shokoku no energy seisaku

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    The E.U. intends to establish the stabilized new partnership and economic area, based on free trades and tighter economic cooperation with Mediterranean countries. For the purpose of establishing the effective cooperative relationship in the energy field, the E.U. committee taking the short- and medium-term initiative prepares as follows: The establishment of the European/Mediterranean Energy Forum is thought of. This is for the joint management of cooperation in the energy field and the organization of the conferences and meetings of information exchanges between partners. The discussion is started for the final joining in the organization of partners of Mediterranean countries who do not participate in the Pan-European Energy Charter conference. They study options adoptable for easing investments. They cooperate with the related countries for carrying out the project having common interest in the TENs (Trans-European energy networks) field. The working-out of plans and projects is promoted for coordinating energy projects according to the purposes and procedures of MEDA. 59 refs.

  6. Achievement report for fiscal 1998 on the preceding research related to global environment industry technologies. Survey and research on reduction of nitrogen monoxide; 1998 nendo chikyu sangyo gijutsu ni kakawaru sendo kenkyu asanka chisso no haishutsu teigen ni kansuru chosa kenkyu seika hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Nitrogen monoxide is a strong greenhouse effect gas having warming up index per molecule 300 times greater than that of CO2, and is designated as the object of reduction in the Kyoto Conference. The present preceding research discusses necessity of performing research and development works related to reducing the emission of nitrogen monoxide, and if it is necessary, places the final objective on proposition of what researches should be planned. Fiscal 1997 being the first fiscal year of the preceding research has surveyed emission amount from different emission sources, and enumerated the research and development assignments. Fiscal 1998 falling under the final fiscal year summarizes the emission amount including the future trends, surveys the feasibility of the promising technological measures through experiments, and proposed finally a research and development plan desired of implementation in the future. The proposal contains a research plan placing development of nitrogen monoxide decomposing catalysts and automobile catalysts as the main objectives. Among the domestic nitrogen monoxide generating sources, about 2/3 is the man-made generation sources, hence catalysts, if developed, may be applied to such facilities as combustion furnaces. (NEDO)

  7. 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)

    NONE

    1994-03-01

    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.

  8. Fiscal 1997 report on the results of the international standardization R and D. Study on optimizing design/evaluation technology using quality engineering; 1997 nendo seika hokokusho kokusai hyojun soseigata kenkyu kaihatsu. Hinshitsu kogaku ni yoru saitekika sekkei hyoka gijutsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    To take up methodology of quality engineering as ISO standards, the basic document was worked out which regulates general items for the method to evaluate the operation of various systems as function for proposal to ISO. A method is developed for evaluating the design quality by function and predicting/optimizing the quality of finished products. For the evaluation of slippage from ideal function, the SN ratio and Maharanobis`s distance are used. In the two basic working groups (WG), a document on general methods to evaluate function was made. To reinforce the basic document, WGs divided into five by content/business were set up. Each WG collected examples from the past, studied methods to evaluate function in each field, and recorded them in the document. Five experiments for each WG were conducted to verify effectiveness of the above-mentioned method to evaluate function recorded in the document. As a result, the draft to present to ISO was worked out since the experimental WGs proved the effectiveness of the method to evaluate function in each field. 85 refs., 147 figs., 185 tabs.

  9. Fiscal 1995 survey of the base arrangement promotion for foreign coal import. Investigation on the policy of coal demand stabilization using low grade coal; 1995 nendo kaigaitan yunyu kiban sokushin chosa. Teihin`itan riyo ni yoru sekitan jukyu anteika hosaku ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-01

    The paper investigated the trend of and the needs for low grade coal utilization and the seeds of low grade coal utilization technology and studied usability of low grade coal in the future. Importance of low grade coal utilization was described in consideration of features of the Asia/Pacific area in the world coal market, and the trend of production/utilization of low grade coal was examined mostly in countries holding main low grade coals in the Asia/Pacific area. The trend of the technical development contributing to the low grade coal utilization was studied to make it contribute to the extraction of technologies which are regarded as effective in the Asia/Pacific area. A study was made of applicability of the low grade coal utilization technology corresponding to the needs for low grade coal utilization, and at the same time, a study was made of the effect on the coal supply/demand in the Asia/Pacific area in case the low grade coal utilization is promoted helped by the study. Focusing on technical cooperation relating to clean coal technology, a study was conducted of the trend of international cooperation in Japan and various overseas countries and the trend of new cooperation in private sectors, and a discussion was made on how Japan should act toward promotion of low grade coal utilization. 12 figs., 91 tabs.

  10. Fiscal 2000 technology trend survey. Survey and study report on the development of high-frequency devices to support IT revolution leading to energy use rationalization; 2000 nendo gijutsu doko to chosa. Energy shiyo gorika ni kakawaru IT kakumei wo support suru koshuha device no kaihatsu ni kansuru chosa kenkyu hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-03-01

    Surveys and studies were conducted for the development of technologies basic to the construction of an ultrahigh-speed huge-capacity high-frequency radio access and communication network, especially the network infrastructure, in the several 10 to several 100 GHz band. Some surveys covered the positioning of high-frequency high-output device modules as the key component, needs for their use in radio communication equipment, devices to be needed for their construction, technologies for their manufacture, process technologies for their embodiment, basic technologies for their materials, and so forth. Some others covered research on the marketability of high-frequency devices in the future, development of relevant technologies abroad, and so forth. The mainstream of high-frequency devices these days rests on the secondary electron gas system based on GaAs and InP, and therefore it is intrinsically difficult for them to yield high outputs. It is deemed to be important to develop technologies based on novel semiconductor materials, such as nitride semiconductors which have excellent properties as materials, toward the construction of a network infrastructure for the next generation. (NEDO)

  11. Fiscal 1995 survey report on the feasibility study of the environmentally friendly type coal utilization system. Survey on the environmentally friendly type coal utilization system in the coal preparation sector in China; Kankyo chowagata sekitan riyo system kanosei chosa. Chugoku no sentan bumon ni okeru kankyo chowagata sekitan riyo system ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-06-01

    Specifying the coal preparation technology among clean coal technologies (CCT) in China, the paper investigated governmental policies, plans, standards of coal preparation technology, subjects, etc. toward the introduction/spread of coal preparation technology, and studied decision, introduction and spread of the coal preparation system suitable for the coal utilization status in China. The survey was conducted in Shanxi and Henan Provinces which are main provinces of coal production, and field survey was made at some selected coal preparation plants having different operational conditions. In the field survey, problems on the operation were extracted, and points of improvement were studied at the same time. Further, to grasp the positioning of coal preparation in CCT in China, survey was carried out on laws and regulation on coal preparation in terms of energy and environmental policies. Finally, the result of the field survey was analyzed, a coal preparation system of which the introduction/spread in medium- and long-term are enabled was proposed considering the coal utilization status and economic situation in China, and how to introduce/spread it was studied. 35 figs., 42 tabs.

  12. 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)

    1995-12-31

    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.

  13. 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)

    1997-06-01

    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.

  14. Achievement report for fiscal 1998 on area consortium research and development business, 1st year. Area consortium energy research and development (biofuel production by advanced function bioreactor); 1998 nendo chiiki consortium energy bun'ya. Kokino bio reactor ni yoru bio nenryo seisan ni kansuru kenkyu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Studies were made to produce ethanol directly from starch and cellulose and to collect biodiesel fuels from waste oil by an enzymatic method. For an increase in the yield of biodiesel fuel production, lipase enzymes were explored and optimum reaction conditions were sought for. Starch decomposition was quick for conversion into the target material in a system with the co-expression of amylase and glucoamylase present on the yeast cell surface layer. There was dramatically rapid progress in the increase of enzymatic activity in the cell, although dependent on cell membrane surface treatment conditions. In the generation of acetaminophen by recombinant cohesive yeasts, highly active and expressive yeasts were automatically fixed in the porous support (intelligent bioreactor) while those deactivated or dead were automatically removed. For the construction of a fuzzy control system for this reaction, basic models were investigated, built on the basis of the enzymatic model of reaction and substance balance. A high-precision structural analysis was conducted for the exploration of secondary structure stabilizing factors in protein and peptide and for the elucidation of correlations between structure and function. (NEDO)

  15. Study of the ablation of extra-low temperature aggregate target and the development of technology of formation of non-equilibrium high-quality functional thin films by the plume control; Gokuteion gyoshutai target no abureshon oyobi purumu seigyo ni yoru hiheiko kohinshitsu kinosei usumaku seisei gijutsu kaihatsu ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    A study was made on factors of the formation of high-quality thin films in the pulse laser deposition (PLD) method, a synthesis method of high-grade functional material thin films. In the experiment, plume current measurements using Cu target were conducted for the control of electric and magnetic fields. Especially, the measuring evaluation was made of the two-dimensional distribution including not only the central part of the substrate placed opposite to the target, but the periphery of the substrate. As a result, the following was found out. The distribution of charged particles in the plume is different in positive charge and negative charge, and the negative charge is dispersed/distributed more widely. Accelerating/decelerating effects of charged particles by the electric field are saturated when the bias voltage absolute value is approximately 100V. Ionization is promoted by giving the magnetic field, and the plume distribution is expanded. Positive charged particles of the plume in the magnetic field are decelerated. In the distribution control by giving the electric field, it is effective to think improvement of the distribution not by attracting charged particles by the electric field, but by shutting out charged particles of the same polarity. 29 refs., 75 figs., 2 tabs.

  16. Research on variable swirl intake port for high-speed multivalve DI diesel engine. Effects of port configuration on flow characteristics and swirl generation capacity; 4 ben kogata kosoku DI diesel engine no kahen swirl kyuki port ni kansuru kenkyu. Kyuki port haichi ga ryudo tokusei to swirl seino ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Kawashima, J.; Ogawa, H.; Tsuru, Y. [Nissan Motor Co. Ltd., Tokyo (Japan)

    1997-10-01

    In our previous papers, the variable swirl intake port system which can control a wide swirl ratio range (from 4 to 10) was described. This system consisted of two separate intake ports, one of them has a flow control valve for changing the swirl ratio. In this type of variable swirl system, some variations of port combination, port shape, and position can be designed. In this paper, the intake flow characteristics of various port combinations were analyzed on the basis of a steady-state air flow test and 3-dimensional computations. The results indicate that the total performance of the twin ports can be estimated from that of a single port in any kind of port combination. Some difference in flow patterns were found in a variety of port combinations even if each swirl ratio is similar. The selected port combinations in our previous study are good for a wide swirl control range. 11 refs., 9 figs., 1 tab.

  17. Survey report for fiscal 1997 on the survey report on the actual state of technical cooperation on industrial technologies by European countries in the South-eastern Asian region; 1997 nendo Tonan Asia chiiki ni okeru Obei shokoku no sangyo gijutsu ni kansuru gijutsu kyoryoku jittai chosa hokokusho

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    The actual state was surveyed on the technical cooperation by European countries in the South-eastern Asian region. The U.S.A. is making research cooperation with Thailand on ethylene molecule structures to enhance productivity in rubber production, France on molecule markers for high production rubber clone selection, and Australia on grain storing and drying methods. For the Philippines, America is giving assistance on management of reproducible resources, France on climate information communications systems for local areas, Australia on grain storing and drying methods, and Germany on waste oil recovery and reutilization, and development of pollution-free energy resources. For Malaysia, the Great Britain is cooperating on building engineering research centers, Australia on search for plant patheology genetic organics available in the Pacific region, and Germany on investigative researches on pollution prevention for tin mines and processing areas, and forestry and plant information systems. With respect to the ASEAN, this paper reports its activities placing importance on biology and electronics engineering, while the organization is taking actions in the areas of foodstuffs, animals, electronics, information and material science, energy exploration, marine and earth physics, and resource development. (NEDO)

  18. Survey report for fiscal 1998. Survey of the current state and tasks of research and development of technologies for effectively utilizing CO{sub 2} fixation by higher vegetation; 1998 nendo chosa hokokusho. Koto shokubutsu ni okeru nisanka tanso koteika yuko riyo gijutsu no kenkyu kaihatsu no genjo to kadai ni kansuru chosa

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Investigations and studies are conducted seeking for a CO2 fixation method improved by utilizing the photosynthesizing function of higher vegetation. Details of higher vegetation genes are being disclosed thanks to the rapid progress of studies making use of molecular biological techniques, and the application of the genetic mechanism to scientific and technological fields is becoming increasingly feasible. In particular, the role of the CO2 fixation enzyme RuBisCO has been elucidated almost completely. It has been learned that, in terms of photosynthesizing capability, the C{sub 4} plants (corn etc.) are 2-3 times higher than the C{sub 3} plants (rice, wheat, etc.), and 5-10 times higher than the CAM plants (cactuses etc.). Studies are also under way about the rice genome so that a photosynthesizing capability so high as that of the C{sub 4} plants may be endowed the rice plant. The metabolism and control of useful substances produced in the CO2 fixation process etc. in the higher vegetation are being investigated, and it is now expected that some day such useful substances will be produced and utilized efficiently. Researches are under way into the relationship between the green leaf that is the organ that performs photosynthesis and the organ (sink) that stores and utilizes starch and sugar is in progress, and now a new field is going to open where vegetables will be fully utilized. (NEDO)

  19. Theoretical study on instability mechanism of jet-induced sloshing. Model development using Orr-Sommerfeld equation generalized for non-parallel flow; Funryu reiki sloshing gensho no hassei kiko ni kansuru rironteki kenkyu. Hiheiko nagare ni ippankashita Orr-Sommerfeld hoteishiki wo mochiita model ka

    Energy Technology Data Exchange (ETDEWEB)

    Eguchi, Y. [Central Research Institute of Electric Power Industry, Tokyo (Japan)

    1998-07-25

    A theoretical model was developed to study the mechanism of free surface sloshing in a vessel induced by a steady vertical jet flow. In the model, jet deflection is calculated with eigen values of the generalized Orr-Sommerfeld equation which is applicable to slightly non-parallel jet. Instability criteria employed in the model are (1) resonace condition between sloshing and jet frequencies and (2) {pi} phase relation between jet displacement at an inlet and global jet deflection. Numerical results of the mathematical model have shown good agreement with experimental ones, which justifies that the inherent instability of free jet itself and edge tone feedback are the main causes of the self-excited sloshing. 9 refs., 10 figs.

  20. FY 1997 report on the study on cryogenic aggregate target PLD process by multi-laser excitation for using gaseous materials; 1997 nendo chosa hokokusho (kitai genryo riyo no tame no taju laser reiki ni yoru gokuteion gyoshutai target PLD process ni kansuru kenkyu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This paper reports the result in fiscal 1995 of the study on PLD (pulse laser deposition) thin film formation process having been made since 1993. In fiscal 1995, the effect of irradiation of excimer laser and YGA(SHG) on ablation of aggregates of N2, CH4, Ar, Kr and Xe, and the effect of time-delayed irradiation of YGA(SHG) and KrF excimer laser on ablation of N2 aggregate were studied aiming at exciting ablation by cryogenic aggregate alone. Experimental results by a newly developed multi-laser excitation experiment equipment are as follows. Ablation was not caused by KrF excimer laser irradiation, while caused by YGA(SHG) irradiation. Ablation was caused by 1mm thick N2 or CH4 aggregate alone. Kr target was the most promising among rare gas solid targets expected as seed of ablation occurrence. Multi-irradiation showed a different ablation behavior as compared with single YGA(SHG) irradiation, and in some cases, multi-irradiation not increased scattering of particles. Time-delayed multi- irradiation (YGA(SHG) excitation after excimer excitation) was effective. 23 figs., 4 tabs.

  1. Combustion characteristics of stratified mixture. 1st Report. Measurement of mixture distribution in a constant-volume combustion chamber using laser-induced NO2 fluorescence; Sojo kongoki no nensho tokusei ni kansuru kenkyu. 1. Laser reiki NO2 keikoho ni yoru teiyo nenshokinai kongoki bunpu no keisoku

    Energy Technology Data Exchange (ETDEWEB)

    Fujimoto, M.; Nishida, K.; Hiroyasu, H. [Hiroshima University, Hiroshima (Japan). Faculty of Engineering; Tabata, M. [Mazda Motor Corp., Hiroshima (Japan)

    1996-06-25

    Laser-induced fluorescence from nitrogen dioxide (NO2) as gas fuel tracer was applied to determine mixture stratification in a pancake-type constant-volume combustion chamber using propane and hydrogen fuels. The second-harmonic output of a pulsed Nd: YAG laser was used as a light source for fluorescence excitation. The fluorescence images were corrected by a gated image-intensified CCD camera. The quantitative analysis of fuel concentration was made possible by the application of linearity between fluorescence intensity and NO2 concentration at a low trace level. The stratified mixture (center-rich or center-lean) was concentrically formed in the central region of the chamber by a jet flow from a tangentially oriented port. The concentration difference in the radial direction of the chamber decreased with time from the start of injection. The rate of decrease was faster for hydrogen than for propane. After 300 ms from start of injection, however, the time histories of the concentration difference were nearly constant for both fuels regardless of overall concentration. 10 refs., 16 figs., 1 tab.

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

    Energy Technology Data Exchange (ETDEWEB)

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

    1991-03-20

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

  3. Study of thermal threshold and counter-measures for human body in oceanic working environment. 1st Report. Heat balance model and heat storage index; Shonetsu kankyoka no kaiyo sagyo ni okeru netsuteki genkai to onnetsu taisaku ni kansuru kenkyu. 1. Netsu shushi model to onnetsu shisu

    Energy Technology Data Exchange (ETDEWEB)

    Fukuchi, N. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Nakamura, M. [Tokyo Gakugei University, Tokyo (Japan); Murayama, M.

    1996-12-31

    Identification was intended on effects of such thermal factors as metabolic amount, environmental temperature and humidity, and clothing resistance on human body temperatures during works under hot environments. Therefore, measurements were carried out on human skin temperatures, rectum temperatures and humidity inside clothing, while amount of motion, environmental temperature, and clothing are changed in a constant temperature room and under a sun irradiation environment. Furthermore, a heat balance model was prepared, which divides the objects into an outer shell layer whose temperature changes depending on the result of this experiment and into a core having constant temperature characteristics. An equation to derive skin temperatures was introduced from the model. The equation formulated a calculation formula for heat accumulation in human body, which can be used as a hot heat index. Relationship between thermal factors and heat storage amount was investigated to consider a thermal limit for a physical work. An equation to derive skin temperatures was confirmed capable of expressing general change in skin temperatures, being proved by comparison with experiments. Calculation formulas for amount of heat stored in human body were shown capable of expressing influence of different thermal factors, the expression being useful as a hot heat index. Calculating the human body heat storage is very largely affected by effect of sweat to dissipate heat, hence it is necessary to improve the accuracy including that for body temperature adjusting reactions. 17 refs., 17 figs., 5 tabs.

  4. Experimental study of friction of tapered surfaces in keyless propeller. 2{sup nd} report. Effects of taper machining error and surface roughness; Keyless propeller ni okeru taper sesshokumen no masatsu ni kansuru-jikken. 2: taper kako gosa oyobi hyomen arasa no eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Kawazoe, T.; Ura, A.; Nakashima, A. [Nagasaki Univ. (Japan)] Nishikido, S. [Mitsubishi Heavy Industries Ltd., Nagasaki (Japan). Nagasaki Shipyard and Engine Works

    1997-12-01

    About 25 years have passed since the development of the keyless propeller, however, recently, torque slip problem is cause in keyless propeller. In the previous report, from one of this factor, experiment was carried out concentrating on the friction behavior at elasto-plastic deformation region. This time, effect of taper machining error and surface roughness, that are the problems while manufacturing keyless propeller and axes on the friction behavior of taper contact surface was studied using a new grip coefficient. As a result, the friction behavior (specially the grip coefficient) during the pushing of keyless propeller was effected greatly by the taper machining error rather than surface roughness and the precision of the taper machining of axis and boss become important. Further, taper machining error is not considered in the design calculation of push-up distance, therefore, if low grip coefficient region is caused in push-up operation, it is preferred that push-up must be carried out up to the decided push-up distance excluding this. These were the clarified things. 6 refs., 10 figs.

  5. Study on a constant-tip-speed-ratio operation of wind power generation system. Effect of load control system on dynamic behavior; Furyoku hatsuden system no hensoku seigyo unten ni kansuru kenkyu. Fuka seigyokei ga system no rikigakuteki kyodo ni oyobosu eikyo

    Energy Technology Data Exchange (ETDEWEB)

    Wakui, T.; Yamaguchi, K. [Waseda University, Tokyo (Japan); Tanzawa, Y. [Nippon Institute of Technology, Saitama (Japan); Hashizume, T.; Ota, E. [Waseda University, Tokyo (Japan). School of Science and Engineering

    1998-06-01

    The effect that the set data of the load control system in a wind power generation system exerts on the dynamic behavior of a system was investigated. The wind power generation system consists of a hybrid wind turbine with combined Darrieus and Savonius rotors, load with a generator and battery in the center, and a controller. A constant-tip-speed ratio operation that holds the circumferential speed ratio in which the power coefficient is maximized irrespective of the change in wind velocity was used to extract and convert the wind energy more effectively. In a high-wind velocity area, the system is operated at a fixed speed, and the increase in rotation is suppressed to protect the wing strength. In a large system, the response characteristics are only slightly improved by the limited load operation range and influenced rotor inertial. Power cannot be fully extracted even if the control system is changed in setting, and the applicability to the wind situation remains low. During the actual operation, the adjustment value of the control system should be set so that the output operation is satisfactorily possible in the specified load operation range, that is, the change in the instantaneous value of an effective power coefficient indicates almost flat gain characteristics in frequency characteristics. 14 refs., 10 figs., 2 tabs.

  6. Investigation of the porous nanostructured Cu/Ni/AuNi electrode for sodium borohydride electrooxidation

    International Nuclear Information System (INIS)

    An electrochemical approach to nanostructured Cu/Ni/AuNi catalyst design using the electrodeposition process followed by galvanic replacement technique is presented. The procedure consisted of the electrodeposition of Ni–Zn on the Ni coating with subsequent replacement of the zinc by gold at open circuit potential in a gold containing alkaline solution. The surface morphologies and compositions of coatings were determined by energy dispersive X-ray and scanning electron microscopy techniques. The results showed that the Cu/Ni/AuNi coatings were porous composing of discrete Au nanoparticles. The electrocatalytic activity of Cu/Ni/AuNi electrodes for sodium borohydride electro-oxidation was studied using cyclic voltammetry, chronoamperometry, chronopotentiometry and electrochemical impedance spectroscopy techniques. The electro-oxidation current on Cu/Ni/AuNi catalyst is much higher than that on flat Au catalyst. The onset potential and peak potential on Cu/Ni/AuNi catalysts are more negative than that on flat Au catalyst for borohydride electrooxidation. The impedance behavior also shows different patterns, capacitive, and negative resistances and inductive loops at different applied anodic potentials. All results show that the Cu/Ni/AuNi catalysts can be applied as potential anode catalysts for the direct borohydride fuel cells

  7. The impact of Ni on the physiology of a Mediterranean Ni-hyperaccumulating plant.

    Science.gov (United States)

    Roccotiello, Enrica; Serrano, Helena Cristina; Mariotti, Mauro Giorgio; Branquinho, Cristina

    2016-06-01

    High nickel (Ni) levels exert toxic effects on plant growth and plant water content, thus affecting photosynthesis. In a pot experiment, we investigated the effect of the Ni concentration on the physiological characteristics of the Ni hyperaccumulator Alyssoides utriculata when grown on a vermiculite substrate in the presence of different external Ni concentrations (0-500 mg Ni L(-1)). The results showed that the Ni concentration was higher in leaves than in roots, as evidenced by a translocation factor = 3 and a bioconcentration factor = 10. At the highest concentration tested (500 mg Ni L(-1)), A. utriculata accumulated 1100 mg Ni per kilogram in its leaves, without an effects on its biomass. Plant water content increased significantly with Ni accumulation. Ni treatment did not, or only slightly, affected chlorophyll fluorescence parameters. The photosynthetic efficiency (FV/FM) of A. utriculata was stable between Ni treatments (always ≥ 0.8) and the photosynthetic performance of the plant under Ni stress remained high (performance index = 1.5). These findings support that A. utriculata has several mechanisms to avoid severe damage to its photosynthetic apparatus, confirming the tolerance of this species to Ni under hyperaccumulation. PMID:26983814

  8. Investigation on the Interactions of NiCR and NiCR-2H with DNA

    Science.gov (United States)

    Chitranshi, Priyanka; Chen, Chang-Nan; Jones, Patrick R.; Faridi, Jesika S.; Xue, Liang

    2010-01-01

    We report here a biophysical and biochemical approach to determine the differences in interactions of NiCR and NiCR-2H with DNA. Our goal is to determine whether such interactions are responsible for the recently observed differences in their cytotoxicity toward MCF-7 cancer cells. Viscosity measurement and fluorescence displacement titration indicated that both NiCR and NiCR-2H bind weakly to duplex DNA in the grooves. The coordination of NiCR-2H with the N-7 of 2′-deoxyguanosine 5′-monophosphate (5′-dGMP) is stronger than that of NiCR as determined by 1H NMR. NiCR-2H, like NiCR, can selectively oxidize guanines present in distinctive DNA structures (e.g., bulges), and notably, NiCR-2H oxidizes guanines more efficiently than NiCR. In addition, UV and 1H NMR studies revealed that NiCR is oxidized into NiCR-2H in the presence of KHSO5 at low molar ratios with respect to NiCR (≤4). PMID:20671951

  9. Point defect evolution in Ni, NiFe and NiCr alloys from atomistic simulations and irradiation experiments

    International Nuclear Information System (INIS)

    Using molecular dynamics simulations, we elucidate irradiation-induced point defect evolution in fcc pure Ni, Ni0.5Fe0.5, and Ni0.8Cr0.2 solid solution alloys. We find that irradiation-induced interstitials form dislocation loops that are of 1/3〈1 1 1〉{1 1 1}-type, consistent with our experimental results. While the loops are formed in all the three materials, the kinetics of formation is considerably slower in NiFe and NiCr than in pure Ni, indicating that defect migration barriers and extended defect formation energies could be higher in the alloys than pure Ni. As a result, while larger size clusters are formed in pure Ni, smaller and more clusters are observed in the alloys. Vacancy diffusion occurs at relatively higher temperatures than interstitials, and their clustering leads to the formation of stacking fault tetrahedra, consistent with our experiments. The results also show that the surviving Frenkel pairs are composition dependent and are largely Ni dominated

  10. Exclusive study of Ni+Ni and Ni+Au central collisions: phase coexistence and spinodal decomposition

    International Nuclear Information System (INIS)

    The INDRA multidetector allowed us to study the Ni+Ni collisions at 32A MeV and the Ni+Au collisions at 52,4 MeV. Central collisions leading to 'quasi-fused' systems were isolated using multidimensional analysis techniques: the Discriminant Analysis and the Principal Component Analysis. Comparison with a statistical model shows that the selected events are compatible with thermodynamical equilibrium. The average thermal excitation energy is 5A MeV for both systems. Calculations of heat capacities show that the deexcitation of the hot sources are akin to a liquid-gas phase transition of nuclear matter. Indeed heat capacities exhibit a negative branch as expected for a phase transition of a finite system. The dynamics of this phase transition has been investigated by applying the charge correlation method. An enhanced production of events with equal-sized fragments has been evidenced for Ni+Au at 52A MeV. No signal was found for Ni+Ni at 32A MeV. Finally this method was improved by taking into account the total charge conservation. The signal is seen more clearly for Ni+Au at 52A MeV, but is ambiguous for Ni+Ni at 32A MeV. The path followed in the state diagram, or the involved time scales, seem to be different for these systems. (authors)

  11. Site Preference and Alloying Effect of Excess Ni in Ni-Mn-Ga Shape Memory Alloys

    Institute of Scientific and Technical Information of China (English)

    CHEN Jie; LI Yan; SHANG Jia-Xiang; XU Hui-Bin

    2009-01-01

    @@ The formation energies and electronic structures of Ni-rich Ni-Mn-Ga alloys have been investigated by first-principles calculations using the pseudopotential plane wave method baaed on density functional theory. The results show that the alloying Ni prefers to occupy the Mn site directly in Ni9Mn3Ga4 and to occupy the Mn site and drive the displaced Mn atom to the Ga site in Ni9Mn4Ga3, which is in accordance with the experimental result. According to the lattice constants and the density of states analyses, these site preference behaviours are closely related to the smaller lattice distortion and the lower-energy electronic structure when the excess Ni occupies the Mn site. The effect of Ni alloying on martensitic transformation is discussed and the enhancement of martensitic transformation temperature by Ni alloying is estimated by the calculated formation energy difference between anstenite and martensite phases.

  12. The ternary system Tm-Ni-In at 870 K

    International Nuclear Information System (INIS)

    The isothermal section of the Tm-Ni-In system at T = 870 K was constructed. Nine ternary compounds: Tm10Ni9In20, TmNi1-0.60In1-1.40, Tm2Ni2In, Tm2Ni1.78In, Tm5Ni2In4, Tm11Ni4In9, Tm4.83Ni2In1.17, Tm6Ni2In and Tm14Ni3In3 exist in the system at the temperature of investigation. Solid solutions with In/Ni and Tm/In mixing were noticed for numerous compounds. A broad substitution of Ni for In was observed for TmNi1-0.60In1-1.40, and of Tm for In for the TmNi2-TmNi4In section. An interstitial solid solution TmxNiIn, based on binary equiatomic NiIn, extends up to 8 at.% Tm (x = 0.17). The magnetic properties of TmNiIn, Tm2Ni2In and Tm5Ni2In4 are also reviewed.

  13. ELEKTRIČNI OBLOK V VAROVALKAH

    OpenAIRE

    Zakelšek, Rok

    2012-01-01

    V diplomski nalogi je obravnavan električni oblok v taljivih varovalkah. Predstavljene so nizkonapetostne in visokonapetostne varovalke ter zgodovinski razvoj električnih varovalk. Opisan je električni oblok in vpliv na električni oblok v nizkonapetostnih taljivih varovalkah ter izvedba preskusov. Izvedeni so bili preskusi na taljivih vložkih z različno granulacijo in količino peska, spremembo talilnega elementa ter spremembo volumna taljivega vložka.

  14. Composite Ni/NiO-Cr2O3 Catalyst for Alkaline Hydrogen Evolution Reaction

    Energy Technology Data Exchange (ETDEWEB)

    Bates, MK; Jia, QY; Ramaswamy, N; Allen, RJ; Mukerjee, S

    2015-03-12

    We report a Ni-Cr/C electrocatalyst with unpreeedented massactivity for the hydrogen evolution reaction (HER). in alkaline electrolyte. The HER Oietics of numerous binary and ternary Ni-alloys and composite Ni/metal-euride/C samples were evaluated in aquebus 0.1 M KOH electrolyte. The highest HER mass-activity was observed for Ni-Cr materials which exhibit metallic Ni as well as NiOx and Cr2O3 phases as determined by X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS) analysis. The onset of the HER is significantly improved compared to munerous binary dor ternary Ni-alloys, inCluding Ni Mg materials. It is likely that at adjacent Ni/NiOx sites, the oxide acts as a sink for OHads, while the metallic Ni acts as a, sink for the H-ads, intermediate of the HER, thus minimizing the high activation energy of hydrogen evolution via water reduction. This is confirmed by in situ XAS studies that show that the synergistic HER enhancement is due to NiO content and that the Cr2O3 appears to stabilize the composite NiO component-under HER conditions (where NiOx would typically be reduced to metallic Ni-0). Furthermore, in contrast to Pt, the Ni(O-x)/Cr2O3 catalyst appears resistant to poisoning by the anion.exchange ionomer (AEI), a serloua consideration when applied to an anionic polymer electrolyte interface. Furthermore, we report a: detailed model of the double layer interface which helps explain the observed ensemble effect in the presence of AEI.

  15. Digitalno samozaložništvo

    OpenAIRE

    KRANJC, ALJAŽ

    2016-01-01

    Digitalno založništvo (znano tudi kot e-založništvo ali elektronsko založništvo) zajema digitalno publikacijo e-knjig, digitalnih revij in razvoj digitalnih knjiž-nic in katalogov. Postalo je nekaj običajnega, da se knjige, revije in časopise distribuira v digitalni obliki. Za izdelavo in oblikovanje naših besedil imamo na voljo veliko spletnih orodij, ki se razlikujejo po namenu glede na vrsto besedila (navadna besedila, znanstveni članki, spletne vsebine). Pregledali smo več samozaložniških...

  16. Effects of Ni vacancy, Ni antisite, Cr and Pt on the third-order elastic constants and mechanical properties of NiAl

    KAUST Repository

    Wu, Shaohua

    2014-12-01

    Effects of Ni vacancy, Ni antisite in Al sublattice, Cr in Al sublattice, Pt in Ni sublattice on the second-order elastic constants (SOECs) and third-order elastic constants (TOECs) of the B2 NiAl have been investigated using the first-principles methods. Lattice constant and the SOECs of NiAl are in good agreement with the previous results. The brittle/ductile transition map based on Pugh ratio G/B and Cauchy pressure Pc shows that Ni antisite, Cr, Pt and pressure can improve the ductility of NiAl, respectively. Ni vacancy and lower pressure can enhance the Vickers hardness Hv of NiAl. The density of states (DOS) and the charge density difference are also used to analysis the effects of vacancy, Ni antisite, Cr and Pt on the mechanical properties of NiAl, and the results are in consistent with the transition map. © 2014 Elsevier Ltd. All rights reserved.

  17. Joining of Ni-TiC FGM and Ni-Al Intermetallics by Centrifugal Combustion Synthesis

    International Nuclear Information System (INIS)

    A centrifugal combustion synthesis (CCS) process has been investigated to join a Ni-Al intermetallic compound and a Ni-TiC cermet. The cermet, a tubular graphite mold, and a green compact of reactants consisting of Al, Ni and NiO were set in a centrifugal caster. When the combustion synthesis reaction was induced in the centrifugal force field, a synthesized molten Ni-Al alloy flowed into the graphite mold and joined to the cermet. The soundness of the joint interface depended on the volume percentage of TiC phase in the cermet. A lot of defects were formed near the interface between the Ni-TiC cermet and the cast Ni-Al alloy when the volume percentage of TiC was 50% or higher. For this kind of cermet system, using a functionally graded cermet such as Ni-10 vol.%TiC/Ni-25 vol.%TiC/Ni-50 vol.%TiC overcame this difficulty. The four-point bending strength of the joined specimen consisting of the three-layered FGM cermet and cast Ni-29 mol%Al alloy was 1010 MPa which is close to the result for a Ni-29 mol%Al alloy specimen

  18. Spin polarization effect of Ni2 molecule

    Institute of Scientific and Technical Information of China (English)

    Yan Shi-Ying; Zhu Zheng-He

    2008-01-01

    The density functional theory (DFT) method (b3p86) of Gaussian 03 is used to optimize the structure of the Ni2 molecule. The result shows that the ground state for the Ni2 molecule is a 5-multiple state, symbolizing a spin polarization effect existing in the Ni2 molecule, a transition metal molecule, but no spin pollution is found because the wavefunction of the ground state does not mingle with wavefunctions of higher-energy states. So the ground state for Ni2 molecule, which is a 5-multiple state, is indicative of spin polarization effect of the Ni2 molecule, that is, there exist 4 parallel spin electrons in Ni2 molecule. The number of non-conjugated electrons is greatest. These electrons occupy different spatial orbitals so that the energy of the Ni2 molecule is minimized. It can be concluded that the effect of parallel spin in the Ni2 molecule is larger than that of the conjugated molecule, which is obviously related to the effect of electron d delocalization. In addition, the Murrell-Sorbie potential functions with the parameters of the ground state and other states of the Ni2 molecule are derived. The dissociation energy De for the ground state of the Ni2 molecule is 1.835 eV, equilibrium bond length Re is 0.2243 nm, vibration frequency ωe is 262.35 cm-1. Its force constants f2, f3 and f4 are 1.1901 aJ.nm-2, 5.8723 aJ.nm-3, and 21.2505 aJ.nm-4 respectively. The other spectroscopic data for the ground state of the Ni2 molecule ωexe, Be and αe are 1.6315cm-1, 0.1141 cm-1, and 8.0145×10-4 cm-1 respectively.

  19. EELS study of the epitaxial graphene/Ni(111) and graphene/Au/Ni(111) systems

    OpenAIRE

    Generalov, A.; Dedkov, Y.

    2011-01-01

    We have performed electron energy-loss spectroscopy (EELS) studies of Ni(111), graphene/Ni(111), and the graphene/Au/Ni(111) intercalation-like system at different primary electron energies. A reduced parabolic dispersion of the \\pi plasmon excitation for the graphene/Ni(111) system is observed compared to that for bulk pristine and intercalated graphite and to linear for free graphene, reflecting the strong changes in the electronic structure of graphene on Ni(111) relative to free-standing ...

  20. Preparation and characterization of Cu(111)-Ni and Cu(110)-Ni surface alloys

    OpenAIRE

    Geus, John W.; Mesters, C.M.A.M.; Wermer, G.; Gijzeman, O.L.J.

    1984-01-01

    The interaction of Ni(CO)4/CO gas mixtures with Cu(111) and Cu(110) single crystal surfaces has been studied with ellipsometry. Auger electron spectroscopy, LEED and argon ion depth profiling. At room temperature Ni atoms with some CO ligands remain at the surface. The amount of Ni that can be deposited is less than one monolayer. The alloy surface is able to bind CO. After exposures above 220°C, the initially deposited amount of Ni resides below the first layer of Cu atoms. The amount of Ni ...

  1. Cosmic ray half life of 56Ni

    International Nuclear Information System (INIS)

    A search for the β+ decay of 56Ni has established an upper limit on the branching ratio of 7.2 x 10-7 for the most likely such transition. This provides a lower limit of 2.3 x 104 years for the cosmic ray half life of 56Ni. 2 refs., 2 figs

  2. Purification of a Ni sup 2+ -binding protein, pNiXa, from Xenopus ovary

    Energy Technology Data Exchange (ETDEWEB)

    Beck, B.L.; Makowski, G.S.; Nomoto, S.; Sunderman, F.W. (Univ. of Connecticut, Farmington (United States))

    1991-03-11

    Previous research on nickel-induced teratogenesis in Xenopus laevis identified several Ni{sup 2+}-binding proteins, including pNiXa in Xenopus ovaries, unfertilized eggs, and embryos. A major goal of this research project is elucidating the role of pNiXa in the uptake, embryotoxicity, and teratogenicity of Ni{sup 2+} in Xenopus. To purify and identify pNiXa, ovarian tissue from mature Xenopus females was homogenized in 3 vol of Tris buffer and centrifuged. The supernatant was centrifuged; the ultracentrifugal supernatant was batch-adsorbed onto DEAE-cellulose. The pNiSa remained unbound and was subsequently adsorbed on phosphocellulose and eluted by a step-wise NaCl gradient. The pNiXa was eluted in 0.25 M NaCl; this fraction was concentrated, and further purified by reverse phase chromatography on a 5 {mu}m C-8 column, with a linear trifluoroacetic acid/acetonitrile gradient. The pNiXa was eluted at {approximately}56% acetonitrile, yielding a single protein band with mol wt {approximately}47 kD,based on SDS-PAGE analysis. Comparison of the amino acid composition of pNiXa versus the results obtained by automated Edman degradation indicated that the N-terminus of pNiXa was blocked. Sequencing of peptide fragments of pNiXa is underway.

  3. Ab initio MO study on the thermal stability of alkyl tetrazoles; Arukiru chikan tetorazoru rui no netsu anteisei yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Ono, Yoshio; Arai Mitsuru; Tamura [The University of Tokyo, Tokyo (Japan). Department of Chemical system Engineering; Matsunaga, Takehiro [National Institute of Materials and Chemical Research, Tsukuba (Japan)

    1999-10-31

    In order to estimate the thermal stability of tetrazoles, ab initio MO calculations of alkyl tetrazoles were carried out and the initial process of thermal decomposition were discussed. The relationships between the chemical structures and the thermal stabilities were investigated. The initial step of the thermal decomposition is the cleavage of the N3-N4 bond, then the C5-N1 bond is cleave. The relationship between the N3-N4 bond length and the thermal stability is recognized, that is, the shorter the bond length is, the more thermally stable the tetrazole is. In addition it turns out, the more positive the ring charge is, the more thermally stable the tetrazole is. The relationship between the {pi}-electron density and the thermal stability is not found. The indexes adopted as a measure of thermal stability indicate that the more equal the bond lengths of the ring are, the more thermally stable they are. From these results, three tetrazoles with both high thermal stability and high nitrogen content are proposed. (author)

  4. Thermodynamic Analysis of Electrodeposited Ni-Mo and Ni-Mo-P Alloys

    Institute of Scientific and Technical Information of China (English)

    GUO Zhong-cheng; XU Rui-dong; WANG Ji-kun

    2004-01-01

    The potential-pH diagram of Ni-P-H2O system is calculated and constructed by use of thermodynamic data. On the basis of the potential-pH diagram the electrochemical behaviors of electrodepositing Ni-Mo and Ni-Mo-P alloys are analyzed. The phases of Ni-Mo and Ni-Mo-P coatings are identified by means of X-ray diffraction analysis. The thermodynamic analysis shows that it is difficult to deposit Mo or P individually from its aqueous solution, and they must be co-deposited with other metals by induced deposition; P and Ni can be deposited as compound Ni3P on the cathode; Mo is deposited in two forms: one is in the form of MoO3 solid particles and the other is in the form of compound MoC. X-ray diffraction analysis is in agreement with the thermodynamic analysis.

  5. Nanoscale structural heterogeneity in Ni-rich half-Heusler TiNiSn

    Energy Technology Data Exchange (ETDEWEB)

    Douglas, Jason E., E-mail: jedouglas@mrl.ucsb.edu; Pollock, Tresa M. [Materials Department, University of California, Santa Barbara, California 93106 (United States); Materials Research Laboratory, University of California, Santa Barbara, California 93106 (United States); Chater, Philip A. [Diamond Light Source, Chilton, Oxfordshire OX11 0DE (United Kingdom); Brown, Craig M. [Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Department of Chemical Engineering, University of Delaware, Newark, Delaware 19716 (United States); Seshadri, Ram [Materials Department, University of California, Santa Barbara, California 93106 (United States); Materials Research Laboratory, University of California, Santa Barbara, California 93106 (United States); Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106 (United States)

    2014-10-28

    The structural implications of excess Ni in the TiNiSn half-Heusler compound are examined through a combination of synchrotron x-ray and neutron scattering studies, in conjunction with first principles density functional theory calculations on supercells. Despite the phase diagram suggesting that TiNiSn is a line compound with no solid solution, for small x in TiNi{sub 1+x}Sn there is indeed an appearance—from careful analysis of the scattering—of some solubility, with the excess Ni occupying the interstitial tetrahedral site in the half-Heusler structure. The analysis performed here would point to the excess Ni not being statistically distributed, but rather occurring as coherent nanoclusters. First principles calculations of energetics, carried out using supercells, support a scenario of Ni interstitials clustering, rather than a statistical distribution.

  6. Nanoscale structural heterogeneity in Ni-rich half-Heusler TiNiSn

    International Nuclear Information System (INIS)

    The structural implications of excess Ni in the TiNiSn half-Heusler compound are examined through a combination of synchrotron x-ray and neutron scattering studies, in conjunction with first principles density functional theory calculations on supercells. Despite the phase diagram suggesting that TiNiSn is a line compound with no solid solution, for small x in TiNi1+xSn there is indeed an appearance—from careful analysis of the scattering—of some solubility, with the excess Ni occupying the interstitial tetrahedral site in the half-Heusler structure. The analysis performed here would point to the excess Ni not being statistically distributed, but rather occurring as coherent nanoclusters. First principles calculations of energetics, carried out using supercells, support a scenario of Ni interstitials clustering, rather than a statistical distribution.

  7. Pt redistribution during Ni(Pt) silicide formation

    OpenAIRE

    Demeulemeester, Jelle; Smeets, D.; Van Bockstael, C; Detavernier, C.; Comrie, C. M.; Barradas, N. P.; Vieira, A; Vantomme, André

    2008-01-01

    We report on a real-time Rutherford backscattering spectrometry study of the erratic redistribution of Pt during Ni silicide formation in a solid phase reaction. The inhomogeneous Pt redistribution in Ni(Pt)Si films is a consequence of the low solubility of Pt in Ni2Si compared to NiSi and the limited mobility of Pt in NiSi. Pt further acts as a diffusion barrier and resides in the Ni2Si grain boundaries, significantly slowing down the Ni2Si and NiSi growth kinetics. Moreover, the observed in...

  8. PtSnNi/C nanoparticle electrocatalysts for the ethanol oxidation reaction: Ni stability study

    International Nuclear Information System (INIS)

    Highlights: ► The addition of Sn and Ni to Pt significantly improves the electrocatalytic activities for EOR. ► PtSnNi/C retain the structure of Pt at values similar to that of pure Pt. ► PtSnNi/C exhibited a lower dissolution of Ni than the binary alloy after accelerated stress tests. ► A change in the product formation pathways before and after accelerated stress tests was observed. -- Abstract: This work describes the use of Pt3Sn/C, Pt3Ni/C and Pt3SnNi/C nanoparticle electrocatalysts with a 20% metal loading on carbon prepared using the polymeric precursor method for the ethanol oxidation reaction (EOR). XRD measurements revealed the presence of segregated Pt and NiO phases in the Pt3Ni/C electrocatalysts, whereas for Pt3SnNi/C, there was some evidence that Ni and Sn atoms are incorporated into the Pt structure with the presence of segregated SnO2 and NiO phases. The mean crystallite sizes were 3.6, 5.7 and 7.2 nm for Pt3Sn/C, Pt3Ni/C, and Pt3SnNi/C, respectively. The onset oxidation potential obtained for the EOR using Pt3SnNi/C was close to 0.22 V. Chronoamperometric measurements revealed that the highest current densities for the EOR were obtained using the Pt3SnNi/C nanoparticle electrocatalysts (16 mA mgPt−1). Based on the Ni accelerated stress tests, this element was more stable in the ternary material. In contrast, there was a change in the product formation pathways before (acetaldehyde and acetic acid were the primary products) and after the accelerated stress tests (acetaldehyde was the primary product) for the Pt3SnNi/C catalyst. The experimental results indicate that the Pt3SnNi/C electrocatalysts exhibited better electrocatalytic activity compared to the other electrocatalysts for the EOR. It is suggested that this activity is related to the presence of Ni, which can modify the electronic structure of Pt and combine with Sn to facilitate the removal of adsorbed CO on the surface of the Pt, thereby promoting the EOR

  9. Microscopic phase field study of the antisite defect of Ni3 Al in binary Ni-Al alloys

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The temporal evolution feature of a microscopic phase field model is utilized to study the antisite defects of L1 2-Ni 3 Al;this is quite different from other physicist’ interests.There are mainly two points in brief.Firstly,antisite defects Ni Al and Al Ni ,which are caused by the deviation from the stoichiometric Ni 3 Al,coexist in the Ni 3 Al phase.The surplus Ni atom in the Ni-rich side is prone to substitute Al thus producing the antisite defect Ni Al that maintains the stability of the L1 2 structure.In other case,the surplus Al atom in the Al-rich side is accommodated by a Ni sublattice consequently giving rise to antisite defect Al Ni .The calculated equilibrium occupancy probability of Ni Al is much higher than that of Al Ni .This point is generally in line with other theoretical and experimental works.Additionally,both Ni Al and Al Ni have a strong negative correlation to time step during the disorder-order transformation.Since the initial value of Ni Al and Al Ni on each site of the matrix is right at the concentration that we set,we can observe the decrease process of Ni Al and Al Ni from the initial disordered high anti-structure state to their respective equilibrium state,i.e.to the result of the ordering process further coarsening.

  10. On the constitution and thermodynamics of Ni-Gd alloys

    International Nuclear Information System (INIS)

    The thermodynamic properties of Ni-Gd alloys were determined by electromotive force measurements between 873 and 1073 K on galvanic cells using CaF2 single crystals as solid electrolytes. Results yield a complete set of thermodynamic functions for the intermetallic phases (Ni), Ni17Gd2, Ni5Gd, Ni4Gd, Ni7Gd2, Ni3Gd, Ni2Gd, NiGd, Ni2Gd3, and NiGd3, as well as information on the phase relations. The system is characterized by pronounced negative deviations from ideality. The relative partial excess Gibbs energy of gadolinium at infinite dilution was determined to be -(104±5) kJ/mol. A comparison with analogous systems indicates the influence of the electronic structure of the components on thermodynamic properties of mixing. In order to fix the liquidus curve, differential thermal analysis was carried out over the entire range of composition. (orig.)

  11. Microstructure of Ni-Al powder and Ni-Al composite coatings prepared by twin-wire arc spraying

    Science.gov (United States)

    Wang, Ji-xiao; Wang, Gui-xian; Liu, Jing-shun; Zhang, Lun-yong; Wang, Wei; Li, Ze; Wang, Qi-xiang; Sun, Jian-fei

    2016-07-01

    Ni-Al powder and Ni-Al composite coatings were fabricated by twin-wire arc spraying (TWAS). The microstructures of Ni-5wt%Al powder and Ni-20wt%Al powder were characterized by scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the obtained particle size ranged from 5 to 50 μm. The morphology of the Ni-Al powder showed that molten particles were composed of Ni solid solution, NiAl, Ni3Al, Al2O3, and NiO. The Ni-Al phase and a small amount of Al2O3 particles changed the composition of the coating. The microstructures of the twin-wire-arc-sprayed Ni-Al composite coatings were characterized by SEM, EDS, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results showed that the main phase of the Ni-5wt%Al coating consisted of Ni solid solution and NiAl in addition to a small amount of Al2O3. The main phase of the Ni-20wt%Al coating mainly consisted of Ni solid solution, NiAl, and Ni3Al in addition to a small amount of Al and Al2O3, and NiAl and Ni3Al intermetallic compounds effectively further improved the final wear property of the coatings. TEM analysis indicated that fine spherical NiAl3 precipitates and a Ni-Al-O amorphous phase formed in the matrix of the Ni solid solution in the original state.

  12. X-ray photoelectron spectroscopy and magnetism of AlDyNi, AlDyNi4 and AlDy3Ni8 compounds

    International Nuclear Information System (INIS)

    The electronic and magnetic properties of AlDyNi, AlDyNi4 and AlDy3Ni8 are studied using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), static and dynamic magnetic measurements. The three compounds AlDyNi, AlDyNi4 and AlDy3Ni8 are single phases and crystallize in the Fe2P, CaCu5 and CeNi3 structure types, respectively. All the investigated compounds order ferromagnetically below the corresponding Curie temperatures. The Curie temperature and the magnetic moments are 25 K and 6 μB/f.u. for AlDyNi, 14 K and 6.9 μB/f.u. for AlDyNi4 and 22K and 19.2 μB/f.u. for AlDy3Ni8. At high temperature the magnetic susceptibility obey the Curie-Weiss law. The paramagnetic Curie temperature and the effective magnetic moments are 30K and 10.88 μB/f.u. for AlDyNi, 28 K and 10.94 μB/f.u. for AlDyNi4 and 18 K and 18.33 μB/f.u. for AlDy3Ni8. XPS valence band and Ni 2p spectra indicated the presence of small magnetic moment on Ni sites in AlDy3Ni8 and AlDyNi4, and a complete filling of Ni 3d band in AlDyNi.

  13. Study of the central collisions in the reactions Ni + Al and Ni + Ni at 28 A.MeV; Etude des collisions centrales dans les reactions Ni + Al et Ni + Ni a 28 A.MeV

    Energy Technology Data Exchange (ETDEWEB)

    Lebreton, L.

    1995-12-01

    The work is in characterisation of mechanisms in the energy range of onset of multifragmentation (excitation energy of composed nucleus around 4 - 5 AMeV). This work focused on an experiment performed at the SARA facility, in Grenoble, using the AMPHORA multi detection array. I have been particularly interested in central collisions in the Ni + Al and Ni + Ni systems. The possibility to detect complete events for Ni + Al, and quasi-complete events for the Ni + Ni case, is the reason of this choice. Furthermore Ni + Ni presents the interest of a symmetrical system, for which the excitation energy per nucleon is maximum. The study of these reactions has been focused on the quasi-complete events (events for which at least 80 % of the total charge has been detected). Heavy ions produced in peripheral collisions are very likely emitted along the beam line or stopped in the plastic detectors, energy thresholds are too high for the quasi-target products detection, consequently by requiring complete or quasi-complete measurement of the total charge, we are able to detect mostly central events. The knowledge of informations like charge, energy or detection angles allows to isolate the source(s) and to reconstruct the size and the excitation energy of the source(s). Comparisons with simulations like sequential emission (GEMINI code), very deep inelastic collision or instantaneous emission (Berliner code) allows to characterise the first stage of the collision (binary collisions or central collisions) and the type of deexcitation of the source(s). Some calculations was also performed with the statistical model code MODGAN. Indeed azimuthal correlations seem to be a good tool in getting more information about involved reaction mechanisms. Comparisons with MODGAN provide information about angular momentum of the source and time delay between emissions of the two particles (separation between sequential or instantaneous process). (author). 69 refs.

  14. Synthesis of honeycomb-like NiS2/NiO nano-multiple materials for high performance supercapacitors

    International Nuclear Information System (INIS)

    Highlights: •3D honeycomb-like NiS2/NiO were prepared via a green hydrothermal process. •The NiS2 reduces the electrochemical impedance of NiO. •The NiS2/NiO electrode exhibits exceptional electrochemical performance. -- Abstract: Three dimensional (3D) honeycomb-like NiS2/NiO nano-multiple materials were successfully prepared by fabricating cribrate NiS2 on the surface of NiO nanosheets through simple hydrothermal process on nickel foam. The morphology and phase structure of the NiS2/NiO are characterized by scanning electron microscopy equipped with energy dispersive X-ray spectrometer, transmission electron microscope, X-ray diffractometer and the electrochemical properties are tested by cyclic voltammetry, galvanostatic charge/discharge and electrochemical impedance spectroscopy. The NiS2/NiO electrode owns lower electrochemical impedance compared with bare NiO substrate and exhibits exceptional capacitance performance with a high specific capacitance of 2251 F g−1 delivered at current density of 1 A g−1, while 1192 F g−1 retained at 20 A g−1. What's more, after 2000 cycles, the specific capacitance remains 1275 F g−1 (at 5 A g−1) with a capacitance retention of 78%. Therefore, the NiS2/NiO electrode shows remarkable electrochemical performance and has a promising future for electrochemical supercapacitors

  15. Synthesis of Supported NiPt Bimetallic Nanoparticles, Methods for Controlling the Surface Coverage of Ni Nanoparticles With Pt, Methods Of Making NiPt Multilayer Core-Shell Structures and Application of the Supported Catalysts for CO2 Reforming

    KAUST Repository

    Li, Lidong

    2015-06-25

    Embodiments of the present disclosure provide for supported Ni/Pt bimetallic nanoparticles, compositions including supported NiPt nanoparticles, methods of making supported NiPt nanoparticles, methods of using supported NiPt nanoparticles, and the like.

  16. Magnetic properties of Ni2N

    International Nuclear Information System (INIS)

    A powder sample of body-centered tetragonal Ni2N in a single phase was prepared by a high rate-type triode dc reactive sputtering and the magnetic properties have been reinvestigated. It is confirmed that Ni2N is not a ferromagnet. However, the material is not a simple paramagnet either and shows a weak spin-glass-like behavior at low temperatures with a freezing temperature of about 8 K. Posible origins of the behavior are discussed. Band-structure calculations are reported to see the stability of the nonmagnetic ground state of bct Ni2N against lattice expansion and appearance of nitrogen vacancies

  17. Manejo del niño febril

    OpenAIRE

    Sara Fernández-Rojas; Rolando Ulloa-Gutiérrez; María L. Avila-Aguero

    2004-01-01

    Introducción: La fiebre en el niño es uno de los principales motivos de consulta en pediatría. En ocasiones, el temor de los padres produce la conocida "fobia febril", que conlleva al uso de los servicios de emergencias hospitalarios y a tratamientos inadecuados. Objetivo: Conocer la percepción, el conocimiento y el manejo que dan a la fiebre los padres o encargados de familia, de aquellos niños hospitalizados en el servicio de Infectología del Hospital Nacional de Niños "Dr. Carlos Sáenz Her...

  18. New developments in Ni/Ti multilayers

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, I.; Hoghoj, P. [Institut Max von Laue - Paul Langevin (ILL), 38 - Grenoble (France)

    1997-04-01

    It is now 20 years since super-mirrors were first used as a neutron optical element. Since then the field of multilayer neutron-optics has matured with multilayers finding their way to application in many neutron scattering instruments. However, there is still room for progress in terms of multilayer quality, performance and application. Along with work on multilayers for neutron polarisation Ni/Ti super-mirrors have been optimised. The state-of-the-art Ni/Ti super-mirror performance and the results obtained in two neutron-optics applications of Ni/Ti multilayers are presented. (author).

  19. Effect of metallic phase content on mechanical properties of (85Cu- 15Ni)/(10NiO-NiFe2O4) cermet inert anode for aluminum electrolysis

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    (85Cu-15Ni)/(10NiO-NiFe2O4) cermets were prepared with Cu-Ni mixed powders as toughening metallic phase and 10NiO-NiFe2O4 as ceramic matrix. The phase composition, microstructure of composite and the effect of metallic phase content on bending strength, hardness, fracture toughness and thermal shock resistance were studied. X-ray diffraction analysis indicates the coexistence of (Cu-Ni), NiO and NiFe2O4 phases in the cermets. Within the content range of metallic phase from 0% to 20% (mass fraction), the maximal bending strength (176.4 MPa) and the minimal porosity (3.9%) of composite appear at the metallic phase content of 5%. The fracture toughness increases and Vickers' hardness decreases with increasing metal content. When the thermal shock temperature difference (△t) is below 200 ℃, the loss rate of residual strength for 10NiO-NiFe2O4 ceramic is only 8%, but about 40% for (85Cu-15Ni)/(10NiO-NiFe2O4) cermets. As △t is above 200 ℃, the residual strength sharply decreases for sample CN0 and falls slowly for samples CN5-CN20.

  20. Transport properties of Nb/PdNi bilayers and Nb/PdNi/Nb Josephson junctions

    International Nuclear Information System (INIS)

    The superconducting proximity effect was examined in both Nb/PdNi (SF) bilayer films and Nb/PdNi/Nb (SFS) Josephson junctions. In Nb/PdNi bilayer films, nonmonotonic behavior of Tc was observed as a function of PdNi thickness dF. The effective exchange energy Eex extracted from the data was about 13 meV. In Nb/PdNi/Nb (SFS) Josephson junctions, the existence of a crossover between the 0 state and the π state was confirmed in the PdNi thickness dependence of Ic. For the junction with dF = 9 nm, such a crossover was observed in the temperature dependence of Ic. Eex estimated from the junctions characteristics was about 19 meV. These behaviors can be interpreted from the view point of a damped oscillatory superconducting order parameter induced at the SF interface.

  1. Microstructure and Martensitic Transformation Behaviors of Explosively Welded NiTi/NiTi Laminates

    Institute of Scientific and Technical Information of China (English)

    YAN Zhu; CUI Li-shan; ZHENG Yan-jun

    2007-01-01

    The study is a first attempt to prepare bulk NiTi/NiTi shape memory alloy (SMA) laminates with a macroscopic heterogeneous composition by explosive welding and investigate their microstructures and martensitic transformation behaviors. After explosive welding, a perfect interfacial bonding between the two components and a reversible martensitic transformation are realized in the tandem.Results show achievement of a fine granular structure and the maximum value of microhardness near the welding interface because of the excessive cold plastic deformation and the high impact velocity during the explosive welding. Meanwhile, the effects of aging on the transformation of the welded tandem are investigated by differential scanning calorimeter (DSC) and subject to discussion. The transformation temperatures of NiTi/NiTi SMAs increase with the rise of the aging temperature. The experimental results indicate the shape memory properties of NiTi/NiTi SMA fabricated by explosive welding can be improved by optimizing the aging technology.

  2. Enhanced broadband near-infrared luminescence from Ni in Bi/Ni-doped transparent glass ceramics

    International Nuclear Information System (INIS)

    Spectral properties of Bi/Ni-doped transparent MgO-Al2O3-Ga2O3-SiO2-TiO2 glass ceramics (GCs) containing spinel solution nanocrystals were investigated. The emission intensity of Ni in Bi/Ni-doped GCs was about 4 times stronger than that of Ni-doped GCs due to energy transfer from Bi to Ni. The Bi/Ni-doped GCs with 0.75 mol% Bi2O3 concentration exhibited a near-infrared emission with full width at half maximum of about 270 nm and a fluorescent lifetime of about 350 μs, making them very promising for applications in broadband optical amplifiers and tunable lasers.

  3. Enhanced broadband near-infrared luminescence from Ni in Bi/Ni-doped transparent glass ceramics

    Science.gov (United States)

    Wu, Botao; Ruan, Jian; Qiu, Jianrong; Zeng, Heping

    2009-07-01

    Spectral properties of Bi/Ni-doped transparent MgO-Al2O3-Ga2O3-SiO2-TiO2 glass ceramics (GCs) containing spinel solution nanocrystals were investigated. The emission intensity of Ni in Bi/Ni-doped GCs was about 4 times stronger than that of Ni-doped GCs due to energy transfer from Bi to Ni. The Bi/Ni-doped GCs with 0.75 mol% Bi2O3 concentration exhibited a near-infrared emission with full width at half maximum of about 270 nm and a fluorescent lifetime of about 350 µs, making them very promising for applications in broadband optical amplifiers and tunable lasers.

  4. Enhanced broadband near-infrared luminescence from Ni in Bi/Ni-doped transparent glass ceramics

    Energy Technology Data Exchange (ETDEWEB)

    Wu Botao; Zeng Heping [State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062 (China); Ruan Jian [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China) and Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China); Qiu Jianrong, E-mail: botao.wu@yahoo.com.c [State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027 (China)

    2009-07-07

    Spectral properties of Bi/Ni-doped transparent MgO-Al{sub 2}O{sub 3}-Ga{sub 2}O{sub 3}-SiO{sub 2}-TiO{sub 2} glass ceramics (GCs) containing spinel solution nanocrystals were investigated. The emission intensity of Ni in Bi/Ni-doped GCs was about 4 times stronger than that of Ni-doped GCs due to energy transfer from Bi to Ni. The Bi/Ni-doped GCs with 0.75 mol% Bi{sub 2}O{sub 3} concentration exhibited a near-infrared emission with full width at half maximum of about 270 nm and a fluorescent lifetime of about 350 mus, making them very promising for applications in broadband optical amplifiers and tunable lasers.

  5. Phase stability and magnetism in NiPt and NiPd alloys

    Energy Technology Data Exchange (ETDEWEB)

    Paudyal, Durga; Mookerjee, Abhijit [S N Bose National Centre for Basic Sciences, JD Block, Sector 3, Salt Lake City, Kolkata 700098 (India)

    2004-08-18

    We show that the differences in stability of 3d-5d NiPt and 3d-4d NiPd alloys arise mainly due to relativistic corrections. The magnetic properties of disordered NiPd and NiPt alloys also differ due to these corrections, which lead to increase in the separation between the s-d bands of 5d elements in these alloys. For the magnetic case we also analyse the results in terms of splitting of majority and minority spin d band centres of the 3d elements. We further examine the effect of relativistic corrections to the pair energies and order-disorder transition temperatures in these alloys. The magnetic moments and Curie temperatures have also been studied along with the short range ordering/segregation effects in NiPt/NiPd alloys.

  6. NiCo-lead zirconium titanate-NiCo trilayered magnetoelectric composites prepared by electroless deposition

    International Nuclear Information System (INIS)

    The NiCo layers with various Ni/Co atomic ratio have been successfully electroless deposited on PZT layers by varying the bath composition. As the cobalt atomic ratio in the deposited layer increases from 17.2 to 54.8 wt%, the magnetostrictive coefficient decreases. The magnetoelectric effect depends strongly on the magnetostrictive properties of magnetostrictive phase. The magnetoelectric coefficient of NiCo/PZT/NiCo trilayers increases with Ni/Co atomic ratio of the deposited NiCo layers increasing from 45:55 to 83:17. A maximum ME voltage coefficient of αE,31 = 2.8 V ⋅ cm−1 ⋅ Oe−1 is obtained at a frequency of about 88 kHz, which makes these trilayers suitable for applications in actuators, transducers and sensors

  7. Effect Of Ni-Additions In NANOCRYSTALLIZED FeNiNbCuSiB Alloys

    International Nuclear Information System (INIS)

    Structure and magnetic properties of Fe73.5-xNixNb3Cu1 Si13.5B9 ( x = 0, 5, 10, 15, 20, 25 at.% ) amorphous and nanocrystalline alloys were investigated. For studying the magnetic behaviour upon changes of Ni and Fe concentration X-ray, Moessbauer measurements as well as thermomagnetic analyses were performed. The first crystallization temperature at about 545 deg C was nearly independent on the Ni concentrations. The temperature of the second crystallization stage decreases when Ni content increases. Additions of Ni cause a small change of the Curie temperature. After annealing at 550 deg C for 1 h a nanocrystalline state was formed which leads to magnetic softening of the sample for smaller additions of Ni (x = 0 - 15). The nanocrystalline structure was not observed for higher Ni contents (x = 20, 25).(Authors)

  8. NiCo-lead zirconium titanate-NiCo trilayered magnetoelectric composites prepared by electroless deposition

    Directory of Open Access Journals (Sweden)

    M. H. Zhou

    2015-04-01

    Full Text Available The NiCo layers with various Ni/Co atomic ratio have been successfully electroless deposited on PZT layers by varying the bath composition. As the cobalt atomic ratio in the deposited layer increases from 17.2 to 54.8 wt%, the magnetostrictive coefficient decreases. The magnetoelectric effect depends strongly on the magnetostrictive properties of magnetostrictive phase. The magnetoelectric coefficient of NiCo/PZT/NiCo trilayers increases with Ni/Co atomic ratio of the deposited NiCo layers increasing from 45:55 to 83:17. A maximum ME voltage coefficient of αE,31 = 2.8 V ⋅ cm−1 ⋅ Oe−1 is obtained at a frequency of about 88 kHz, which makes these trilayers suitable for applications in actuators, transducers and sensors.

  9. Reduction of a Ni/Spinel Catalyst for Methane Reforming

    DEFF Research Database (Denmark)

    Kehres, Jan; Andreasen, Jens Wenzel; Fløystad, Jostein Bø;

    2015-01-01

    microscopy (HRTEM) was performed on the fresh catalyst sample. The Ni particles in the fresh catalyst sample were observed to exhibit a Ni/NiO core/shell structure. A decrease of the Ni lattice parameter is observed during the reduction in a temperature interval from 413 – 453 K, which can be related to the...

  10. Survey of U-C-Ni ternary diagram

    International Nuclear Information System (INIS)

    U-C-Ni ternary diagram presents, in addition to the intermetallic compounds of U-Ni system and uranium carbides, two mixed carbides UC2Ni and U2C3Ni. The first carbide is decomposed from 1400 deg. C; the second is stable up to 1800 deg. C. (authors)

  11. Study of the central collisions in the reactions Ni + Al and Ni + Ni at 28 A.MeV

    International Nuclear Information System (INIS)

    The work will be presented is in line of characterisation of mechanisms in the energy range of onset of multifragmentation (excitation energy of composed nucleus around 4 - 5 AMeV). This work is focused on an experiment performed at the SARA facility, in Grenoble, using the AMPHORA multi detection array. I have been particularly interested in central collisions in the Ni + Al and Ni + Ni systems. The possibility to detect complete events for Ni + Al, and quasi-complete events for the Ni + Ni case, due to the way AMPHORA has been designed, is the reason of this choice. Furthermore Ni + Ni presents the interest of a symmetrical system, for which the excitation energy per nucleon is maximum. The study of these reactions has been focused on the quasi-complete events (events for which at least 80 % of the total charge has been detected). Heavy ions produced in peripheral collisions are very likely emitted along the beam line or stopped in the plastic detectors, energy thresholds are too high for the quasi-target products detection, consequently by requiring complete or quasi-complete measurement of the total charge, we are able to detect mostly central events. The knowledge of informations like charge, energy or detection angles allows to isolate the source(s) and to reconstruct the size and the excitation energy of the source(s). Comparisons with simulations like sequential emission (GEMINI code), very deep inelastic collision or instantaneous emission (Berliner code) allows to characterise the first stage of the collision (binary collisions or central collisions) and the type of deexcitation of the source(s). Some calculations was also performed with the statistical model code MODGAN. Indeed azimuthal correlations seem to be a good tool in getting more information about involved reaction mechanisms. Comparisons with MODGAN provide information about angular momentum of the source and time delay between emissions of the two particles (separation between sequential or

  12. Substituent effects on 61Ni NMR chemical shifts

    OpenAIRE

    Bühl, Michael; Peters, Dietmund; Herges, Rainer

    2009-01-01

    Ni-61 chemical shifts of Ni(all-trans-cdt) L (cdt = cyclododecatriene, L = none, CO, PMe3), Ni(CO)(4), Ni(C2H4)(2)(PMe3), Ni(cod)(2) (cod = cyclooctadiene) and Ni(PX3)(4) (X = Me, F, Cl) are computed at the GIAO (gauge-including atomic orbitals), BPW91, B3LYP and BHandHLYP levels, using BP86-optimised geometries and an indirect referencing scheme. For this set of compounds, substituent effects on delta(Ni-61) are better described with hybrid functionals than with the pure BPW91 functional. On...

  13. Electrodeposited NiCu Alloy Catalysts for Glucose Oxidation

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Jieun; Park, Hansoo; Kim, Sookil [Chung-Ang Univ., Seoul (Korea, Republic of); Ahn, Sang Hyun; Jang, Jong Hyun [Korea Institute of Science and Technology, Seoul (Korea, Republic of)

    2014-07-15

    NiCu alloys have been suggested as potential candidates for catalysts in glucose oxidation. In this study, NiCu alloys with different compositions were prepared on a glassy carbon substrate by changing the electrodeposition potential to examine the effect of Ni/Cu ratios in alloys on catalytic activity toward glucose oxidation. Cyclic voltammetry and chronoamperometry showed that NiCu alloys had higher catalytic activity than pure Ni and Cu catalysts. Especially, Ni{sub 59}Cu{sub 41} had superior catalytic activity, which was about twice that of Ni at a given oxidation potential. X-ray analyses showed that the oxidation state of Ni in NiCu alloys was increased with the content of Cu by lattice expansion. Ni components in alloys with higher oxidation state were more effective in the oxidation of glucose.

  14. Electrodeposited NiCu Alloy Catalysts for Glucose Oxidation

    International Nuclear Information System (INIS)

    NiCu alloys have been suggested as potential candidates for catalysts in glucose oxidation. In this study, NiCu alloys with different compositions were prepared on a glassy carbon substrate by changing the electrodeposition potential to examine the effect of Ni/Cu ratios in alloys on catalytic activity toward glucose oxidation. Cyclic voltammetry and chronoamperometry showed that NiCu alloys had higher catalytic activity than pure Ni and Cu catalysts. Especially, Ni59Cu41 had superior catalytic activity, which was about twice that of Ni at a given oxidation potential. X-ray analyses showed that the oxidation state of Ni in NiCu alloys was increased with the content of Cu by lattice expansion. Ni components in alloys with higher oxidation state were more effective in the oxidation of glucose

  15. Pt redistribution during Ni(Pt) silicide formation

    International Nuclear Information System (INIS)

    We report on a real-time Rutherford backscattering spectrometry study of the erratic redistribution of Pt during Ni silicide formation in a solid phase reaction. The inhomogeneous Pt redistribution in Ni(Pt)Si films is a consequence of the low solubility of Pt in Ni2Si compared to NiSi and the limited mobility of Pt in NiSi. Pt further acts as a diffusion barrier and resides in the Ni2Si grain boundaries, significantly slowing down the Ni2Si and NiSi growth kinetics. Moreover, the observed incorporation of a large amount of Pt in the NiSi seeds indicates that Pt plays a major role in selecting the crystallographic orientation of these seeds and thus in the texture of the resulting Ni1-xPtxSi film

  16. Modeling and simulation of NiO dissolution and Ni deposition in molten carbonate fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Nam, Suk Woo; Choi, Hyung-Joon; Lim, Tae Hoon [Korea Institute of Science & Technology, Seoul (Korea, Republic of)] [and others

    1996-12-31

    Dissolution of NiO cathode into the electrolyte matrix is an important phenomena limiting the lifetime of molten carbonate fuel cell (MCFC). The dissolved nickel diffuses into the matrix and is reduced by dissolved hydrogen leading to the formation of metallic nickel films in the pores of the matrix. The growth of Ni films in the electrolyte matrix during the continuous cell operation results eventually in shorting between cathode and anode. Various mathematical and empirical models have been developed to describe the NiO dissolution and Ni deposition processes, and these models have some success in estimating the lifetime of MCFC by correlating the amount of Ni deposited in the matrix with shorting time. Since the exact mechanism of Ni deposition was not well understood, deposition reaction was assumed to be very fast in most of the models and the Ni deposition region was limited around a point in the matrix. In fact, formation of Ni films takes place in a rather broad region in the matrix, the location and thickness of the film depending on operating conditions as well as matrix properties. In this study, we assumed simple reaction kinetics for Ni deposition and developed a mathematical model to get the distribution of nickel in the matrix.

  17. Rapid separation of nickel for 59Ni and 63Ni activity measurement in radioactive waste samples

    International Nuclear Information System (INIS)

    A separation procedure of Ni has been described for the quantification of 59Ni and 63Ni in radioactive wastes discharged from nuclear power plants and various research activities related to the nuclear fuel cycle. For a rapid separation of the Ni-nuclides in sixteen sample solutions in 0.2 M NH4-oxalate, a separation system composed of a peristaltic pump with sixteen channels and the same number of Ni-Resin columns was constructed. After sorption of the Ni-nuclides by sequentially passing 100 mL of the sample solution in 0.2 M NH4-oxalate, 130 mL of 0.1 M NH4-oxalate solution and 10 mL of deionized water as a wash into the columns, these were purely recovered by passing 10 mL of 9 M HCl into the Ni-Resin columns stacked in series on the anion exchange resin columns. The separation of the Ni-nuclides in sixteen sample solutions can be achieved within 7 h. The chemical yield of the proposed procedure is 92.3 ± 0.8 % (n = 5) and the gravimetric recovery in the preparation stage of the Ni-nuclide sources is also acceptable, 88.5 ± 1.3 % (n = 5). (author)

  18. Thickness and ordering temperature of surface NiO/Ni systems

    Directory of Open Access Journals (Sweden)

    Ying-Ta Shih

    2014-02-01

    Full Text Available We estimate the thickness and ordering temperature of an antiferromagnetic and passivation surface oxide through exchange bias coupling. The surface NiO, which is generated through the exposure of a Ni/Cu(001 surface to oxygen, is taken as a model system on which to perform the estimation. Since no exchange bias is found in the surface NiO/Ni/Cu(001, we have built a sandwich structure of NiO/n ML Ni/10 ML Co/Cu(001 to measure the n dependence of exchange bias. With n ⩽ 2, a large exchange bias field is found above 300 K, which could be due to the direct contact between the oxides and the Co layer. With 3 ⩽ n ⩽ 6, a smaller exchange bias field is found with a blocking temperature of 190 K. This implies that the thickness of NiO is, at most, 3 ML. Discovering the thickness and ordering temperature of the surface NiO provides us to explore the potential applications by using surface NiO.

  19. Studies on the valence electronic structure of Fe and Ni in FeNi1- alloys

    Indian Academy of Sciences (India)

    D K Basa; S Raj; H C Padhi; M Polasik; F Pawlowski

    2002-05-01

    -to- X-ray intensity ratios of Fe and Ni in pure metals and in FeNi1- alloys ( = 0.20, 0.50, 0.58) exhibiting similar crystalline structure have been measured following excitation by 59.54 keV -rays from a 241Am point source, to understand as to why the properties of permalloy Fe0.2Ni0.8 is distinct from other alloy compositions. It is observed that the valence electronic structure of Fe0.2Ni0.8 alloy is totally different from other alloys which may be attributed to its special magnetic properties.

  20. Differences of transformation behavior between Ni-rich TiNi shape memory films and alloys

    Institute of Scientific and Technical Information of China (English)

    贺志荣; 周敬恩

    2002-01-01

    The differences of transformation behavior between Ni-rich TiNi shape memory film (SMF) and shape memory alloy (SMA) age-treated at 773K after solution-treatment at 973K have been investigated, using Ti-51.5Ni thin film and Ti-51.5Ni bulk alloy as examples, by differential scanning calorimetry (DSC), SEM and EDX. It is found that the age-treated Ni-rich TiNi SMF and SMA are of the same types of transformation, i.e., A→R→M (during cooling), and M→A (during heating) (A: parent phase; R: R-phase; M: martensite); the transformation temperature of the TiNi SMF is lower than that of the SMA, but the SMFs hysteresis is larger. The transformation heat of the TiNi SMF and SMA is nearly the same. The reason that TiNi SMFs strain is sensitive to temperature is not hysteresis, but its thickness is thinner, and the temperature is easy to distribute homogeneously.

  1. Continuum mechanics simulations of NiO/Ni-YSZ composites during reduction and re-oxidation

    DEFF Research Database (Denmark)

    Pihlatie, Mikko; Frandsen, Henrik Lund; Kaiser, Andreas; Mogensen, Mogens Bjerg

    2010-01-01

    analysis of the internal factors leading to the dimensional changes and the thermomechanical instability have been addressed, to our knowledge for the first time, using continuum mechanics simulations. The two intertwined percolating phases, YSZ and NiO/Ni, interact and the driving force for the...... dimensional change arises from the volumetric change related to the phase change NiO ↔ Ni. The measurable change in bulk length is given by the ceramic YSZ backbone as a response to the stress created by the chemical strain. The different subprocesses described in the model for YSZ were elastic and anelastic...

  2. Precipitate size dependence of Ni/Ni3Al interface energy

    International Nuclear Information System (INIS)

    The interface energy of Ni/Ni3Al dictates the morphology of Ni3Al precipitate and thereby the creep resistance of the Ni-base superalloy. Based on classical molecular dynamics simulations, we report that the interface formation energy depends on the size of Ni3Al precipitate. This dependence is non-monotonic below 20 nm, and converges to a constant value beyond 20 nm. Such dependence is a result of competition between the attractive interaction of dislocations from neighboring interfaces and the strain energy in the Ni3Al precipitate. Further, from elasticity theory, taking into account of the effect of misfit strain, a similar transformation behavior of dislocation dipole's elastic energy versus interface distance was also obtained, which shows the transition point of about 6.2 nm. - Highlights: • Here, we reported the precipitate size dependence of Ni/Ni3Al interface energy. • Such dependence is a result of competition between the attractive interaction and the strain energy in Ni3Al phase. • From elasticity theory, taking into account of the effect of misfit strain, a similar transformation behavior occurs

  3. Effect of Mg/Ni ratio on microstructure of Mg–Ni films deposited by magnetron sputtering

    Energy Technology Data Exchange (ETDEWEB)

    Matsuda, Junko, E-mail: junko.matsuda@i2cner.kyushu-u.ac.jp [International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan); Uchiyama, Naoki; Kanai, Tomomi; Harada, Kazumi [ATSUMITEC CO., LTD., Ubumi 7111, Yuto-cho, Nishi-ku, Hamamatsu 431-0192 (Japan); Akiba, Etsuo [International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan); Department of Mechanical Engineering, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395 (Japan)

    2014-12-25

    Highlights: • Hydrogenation/dehydrogenation properties of Mg–Ni films depend on the Mg/Ni ratio. • Mg{sub 6}Ni films are composed of Mg-rich amorphous matrix and Mg{sub 2}Ni nanocrystals. • Mg{sub 2}Ni is fully amorphous, in contrast Mg crystallization occurs in Mg{sub 10}Ni films. • Mg{sub 6}Ni films after hydrogenation include Mg{sub 2}NiH{sub 4}, MgH{sub 2} and Mg crystals. • Mg crystallization causes to reduce desorption kinetics and cycle ability. - Abstract: The relationship between the Mg/Ni ratio and microstructure of Mg–Ni films with a Pd-cap deposited by magnetron sputtering is investigated using transmission electron microscopy. As a result, the 6Mg–Ni films are observed to be composed of a Mg-rich amorphous matrix and Mg{sub 2}Ni nanocrystals. In contrast, the 10Mg–Ni films contain Mg nanocrystals and Mg-rich amorphous. The 2Mg–Ni films, which absorb/desorb hydrogen repeatedly as well as 6Mg–Ni films, are fully amorphous and have a homogeneous distribution of Mg and Ni. The hydrogenated 6Mg–Ni film, after 200 cycles of hydrogenation/dehydrogenation, includes Mg{sub 2}NiH{sub 4} and MgH{sub 2} nanocrystals as well as Mg crystals. In conclusion, the crystallization of Mg reduces desorption kinetics and cycle ability of the Mg–Ni films. Our results suggested that Mg crystallization occurs in films with an initial Mg/Ni ratio greater than 7.7 the eutectic composition between Mg and Mg{sub 2}Ni.

  4. Prospect of MH-Ni Batteries Development

    Institute of Scientific and Technical Information of China (English)

    Xu Shaoping; Xing Zhiqiang; Liang Wanlong; Ma Yijun

    2004-01-01

    The development trend and promising application prospects of high-power MH-Ni battery were reviewed by studying and comparing the current high-power batteries research area.High-power MH-Ni batiery has good performlife with 500 ~ 1000 times, abundant material resource, especially abundant rare earth resource in China, high-rate discharging, rapid charging, good safety as well as no pollution, etc., which is regarded as the most promising storage battery for electric vehicles.The performance of high power MH-Ni battery can be brought into play fully and ensure electric vehicles performance if it is equipped with appropriate chargers, controlling system and electric motors.Facing opportunities and challenges, MH-Ni battery has promising application prospects on hybrid electric automobile, electric bicycle and a variety of small sized electric vehicles by improving its technology constantly and developing market actively.

  5. [Ni II] emission in supernova remnants

    International Nuclear Information System (INIS)

    Combining new spectrophotometric data on the Orion and Crab Nebulae with detailed calculations, the authors show that strong [Ni II] λ7378 emission observed in numerous SNR's may be associated with gas having Ne > 50,000 cm-3

  6. Ni adsorption and Ni-Al LDH precipitation in a sandy aquifer: An experimental and mechanistic modeling study

    NARCIS (Netherlands)

    Regelink, I.C.; Temminghoff, E.J.M.

    2011-01-01

    Mining activities and industries have created nickel (Ni) contaminations in many parts of the world. The objective of this study is to increase our understanding of Ni adsorption and Nickel-Aluminium Layered Double Hydroxide (Ni-Al LDH) precipitation to reduce Ni mobility in a sandy soil aquifer. At

  7. Amorphous Ni-P Hollow Spheres Prepared by Self-assembly of Ni-P Nanoparticles on Polystyrene Beads

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The first preparation of amorphous Ni-P/PS (polystyrene) core-shell and Ni-P hollow microspheres was per-formed using a surface seeding-electroless plating method. The preliminary magnetic properties of the amorphous Ni-P hollow sphere were investigated and compared with those of the Ni hollow sphere.

  8. Preparation of C/Ni-NiO composite nanofibers for anode materials in lithium-ion batteries

    Science.gov (United States)

    Luo, Chenghao; Lu, Weili; Li, Yu; Feng, Yiyu; Feng, Wei; Zhao, Yunhui; Yuan, Xiaoyan

    2013-11-01

    Carbon nanofibers (CNFs) embedded with various amounts of Ni and NiO nanoparticles (C/Ni-NiO) were prepared by electrospinning of polyacrylonitrile (PAN), followed by heat treatment. The structure and composition of the obtained C/Ni-NiO composite nanofibers were analyzed by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. The results suggested that the morphology, nanofiber diameter, and the content of the Ni-NiO nanoparticles in the CNFs were controlled by different amounts of nickel acetate added into the PAN. The electrochemical measurements of a charge/discharge experiment and a cyclic voltammetry test indicated that the content and the size of Ni-NiO nanoparticles embedded in the CNFs had a great influence on the electrochemical performance of lithium-ion batteries. CNFs embedded with a certain content of Ni-NiO nanoparticles as binder-free anodes for rechargeable lithium-ion batteries exhibited improved electrochemical performance, including high reversible capacities, good capacity retention, and stable cycling performance. This is mainly ascribed to the formation of a well-distributed Ni-NiO nanoparticle structure and the buffering role of the carbon nanofiber matrix, together with the high theoretical capacity of NiO and the increase in electrode connectivity caused by the formation of electrochemically inactive Ni nanoparticles.

  9. Density functional theory study of the interfacial properties of Ni/Ni{sub 3}Si eutectic alloy

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Yuhong, E-mail: zyh388@sina.com [College of Materials Science and Engineering, North University of China, Taiyuan 030051 (China); Wen, Zhiqin; Hou, Hua; Guo, Wei [College of Materials Science and Engineering, North University of China, Taiyuan 030051 (China); Han, Peide [College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 (China)

    2014-06-01

    In order to clarify the heterogeneous nucleation potential of α-Ni grains on Ni{sub 3}Si particles in Ni-Ni{sub 3}Si eutectic alloy, the work of adhesion (W{sub ad}), fracture toughness (G), interfacial energy (γ{sub i}), and electronic structure of the index (0 0 1), (1 1 0) and (1 1 1) Ni/Ni{sub 3}Si interfaces with two different cohesive manners are investigated using first-principles method based on density functional theory. Results indicate that the center site stacking sequence (OM) is preferable to continue the natural stacking sequence of bulk Ni and Ni{sub 3}Si. Since OM stacking interfaces have larger W{sub ad}, G and γ{sub i} than that of the top site stacking (OT) interfaces. The Ni/Ni{sub 3}Si (1 1 0) interface with OM stacking has the best mechanical properties. Therefore, the formation of this interface can improve the stability, ductility and fracture toughness of Ni-Ni{sub 3}Si eutectic alloy. The calculated interfacial energy of Ni/Ni{sub 3}Si (0 0 1), (1 1 0) and (1 1 1) interfaces with OM stacking proves the excellent nucleation potency of Ni{sub 3}Si particles for α-Ni phase from thermodynamic considerations. Besides, the electronic structure and chemical bonding of (1 1 0) interface with OM stacking are also discussed.

  10. Nuclear magnetic resonance in LaNi/sub 5/

    Energy Technology Data Exchange (ETDEWEB)

    Rubinstein, M.; Swartzendruber, L.J.; Bennett, L.H.

    1979-03-01

    Proton and La/sup 139/ nuclear magnetic resonance measurements have been performed on LaNi/sub 5/, LaNi/sub 5/ hydrides, and LaNi/sub 5/H/sub x/ with ternary additions. With ternary additions, the activation energy for proton diffusion remained unchanged, but the motionally narrowed linewidth broadened. The quadrupole interaction on the La site has been determined in LaNi/sub 5/ and LaNi/sub 5/H/sub x/.

  11. The ternary system Tm-Ni-In at 870 K

    Energy Technology Data Exchange (ETDEWEB)

    Tyvanchuk, Yuriy B.; Kalychak, Yaroslav M. [Ivan Franko National University of Lviv (Ukraine). Dept. of Analytical Chemistry; Lukachuk, Maryana; Poettgen, Rainer [Muenster Univ. (Germany). Inst. fuer Anorganische und Analytische Chemie; Szytula, Andrzej [Jagiellonian Univ., Krakow (Poland). Inst. of Physics

    2015-11-01

    The isothermal section of the Tm-Ni-In system at T = 870 K was constructed. Nine ternary compounds: Tm{sub 10}Ni{sub 9}In{sub 20}, TmNi{sub 1-0.60}In{sub 1-1.40}, Tm{sub 2}Ni{sub 2}In, Tm{sub 2}Ni{sub 1.78}In, Tm{sub 5}Ni{sub 2}In{sub 4}, Tm{sub 11}Ni{sub 4}In{sub 9}, Tm{sub 4.83}Ni{sub 2}In{sub 1.17}, Tm{sub 6}Ni{sub 2}In and Tm{sub 14}Ni{sub 3}In{sub 3} exist in the system at the temperature of investigation. Solid solutions with In/Ni and Tm/In mixing were noticed for numerous compounds. A broad substitution of Ni for In was observed for TmNi{sub 1-0.60}In{sub 1-1.40}, and of Tm for In for the TmNi{sub 2}-TmNi{sub 4}In section. An interstitial solid solution Tm{sub x}NiIn, based on binary equiatomic NiIn, extends up to 8 at.% Tm (x = 0.17). The magnetic properties of TmNiIn, Tm{sub 2}Ni{sub 2}In and Tm{sub 5}Ni{sub 2}In{sub 4} are also reviewed.

  12. Domain structure and magnetization process of a giant magnetoimpedance geometry FeNi/Cu/FeNi(Cu)FeNi/Cu/FeNi sensitive element

    International Nuclear Information System (INIS)

    The magnetization process and the magnetic domains of the FeNi (100 nm)/Cu (2.5 nm)/FeNi (100 nm)/Cu (480 nm)/FeNi (100 nm)/Cu (2.5 nm)/FeNi (100 nm) structure were studied. This geometry consists of two FeNi/Cu/FeNi trilayers with a thick in the direction perpendicular to the plane of the sensitive element and narrow in the direction of the flowing current Cu electrode in the centre. Ferromagnet/conductor/ferromagnet is the typical geometry of magnetoimpedance thin-film-based sensitive elements used to detect small magnetic fields. Multilayered structures were prepared by rf-sputtering in a magnetic field of 100 Oe applied perpendicular to the Cu electrode in order to induce transverse magnetic anisotropy. The magnetic measurements and magnetic domain structure observations were made in magnetic fields applied one at a time parallel or perpendicular to the Cu electrode. Different magnetization processes with non-homogeneous rotations in the first case and dominant multiple nucleation and merging of domains in the second one were observed

  13. Ni2+ doping DNA: a semiconducting biopolymer

    International Nuclear Information System (INIS)

    DNA is a one-dimensional nanowire in nature, and it may not be used in nanodevices due to its low conductivity. In order to improve the conducting property of DNA, divalent Ni2+ are incorporated into the base pairs of DNA at pH≥8.5 and nickel DNA (Ni-DNA) is formed. Conducting scanning probe microscopy (SPM) analysis reveals that the Ni-DNA is a semiconducting biopolymer and the Schottky barrier of Ni-DNA reduces to 2 eV. Meanwhile, electrochemical analysis by cyclic voltammetry and AC impedance shows that the conductance of Ni-DNA is better than that of native DNA by a factor of approximately 20-fold. UV spectroscopy and DNA base pair mismatch analyses show that the conducting mechanism of Ni-DNA is due to electrons hopping through the π-π stacking of DNA base pairs. This biomaterial is a designable one-dimensional semiconducting polymer for usage in nanodevices

  14. Structural Investigation of Fe-Ni-S and Fe-Ni-Si Melts by High-temperature Fluorescence XAFS Measurements

    Energy Technology Data Exchange (ETDEWEB)

    Manghnani, M.; Hong, X.; Newville, M.; Balogh, J. (Hawaii); (UC)

    2007-03-01

    Iron-nickel (Fe-Ni) alloy is regarded as the most abundant constituent of Earth's core, with an amount of 5.5 wt% Ni in the core based on geochemical and cosmochemical models. The structural role of nickel in liquid Fe-Ni alloys with light elements such as S or Si is poorly understood, largely because of the experimental difficulties of high-temperature melts. Recently, we have succeeded in acquiring Ni K-edge fluorescence x-ray absorption fine structure (XAFS) spectra of Fe-Ni-S and Fe-Ni-Si melts and alloys. Different structural environment of Ni atoms in Fe-Ni-S and Fe-Ni-Si melts is observed, supporting the effect of light elements in Fe-Ni melts.

  15. Alpha Ni optical model potentials

    Science.gov (United States)

    Billah, M. M.; Abdullah, M. N. A.; Das, S. K.; Uddin, M. A.; Basak, A. K.; Reichstein, I.; Sen Gupta, H. M.; Malik, F. B.

    2005-11-01

    The present work reports the analyses of the experimental differential cross-sections of α elastic scattering on 58,60,62,64Ni, over a wide range of incident energies, in terms of four types of optical potentials, namely shallow (molecular), deep non-monotonic, squared Woods-Saxon and semi-microscopic folding. All the four potentials produce a reasonable description of the experimental data. The potential parameters, calculated from the energy density functional theory using a realistic two-nucleon interaction, resemble closely the molecular potential parameters, which produce the best description of the experimental data for the four isotopes. The volume integrals and the energy variation of the parameters indicate the effect of the shell-model structure on the potentials. The folding potentials, without any need for renormalization, are found to describe reasonably well the elastic scattering cross-section data for the four isotopes within the energy range considered. In conformity with the previous observation on Ca isotopes, the number of nucleons, 4A=49, existing in α-like clusters in the target nucleus, is the same for the four isotopes, considered herein.

  16. The formation model of Ni-Cr oxides on NiCoCrAlY-sprayed coating

    International Nuclear Information System (INIS)

    The atomic arrangement and distribution of oxides (Cr2O3, NiCr2O4 and NiO) on the sprayed-NiCoCrAlY coating after oxidation are analyzed. The formation and the growth model of Ni-Cr oxide phases are discussed according to the matching relationship between atoms. The outline character and a scale of spinel NiCr2O4 are discussed. The results show that Cr atoms can form two close-packed arrangements in the crystal plane of Cr2O3 perpendicular to orientation. The atomic spacing in the first arrangement corresponds to double that of Ni/Ni3Al in {1 1 1} crystal face. This suggests that Ni/Ni3Al is the substrate for Cr2O3 to grow along direction. The lattice mismatch between Cr2O3 and Ni/Ni3Al is less than that of Al2O3, which indicates that Cr2O3 is easier to form than Al2O3 during the oxidation process. The atomic spacing in another close-packed arrangement of Cr2O3 perpendicular to orientation is approximately equal to that of Ni or Cr in the plane of NiCr2O4 and NiO perpendicular to orientation. So Cr2O3 can be the substrate for NiCr2O4 and NiO to grow in the direction. NiCr2O4 and NiO can grow directly along the orientation on each other. NiCr2O4 can grow outward in the planes of Cr2O3 perpendicular to and grow inward along orientation of NiO.

  17. Recrystallization textures of powder metallurgically prepared pure Ni, Ni-W and Ni-Mo alloy tapes for use as substrates for coated superconductors

    International Nuclear Information System (INIS)

    Development of cube texture after heavy cold deformation and annealing has been studied in powder metallurgically prepared pure Ni, Ni-5at.%Mo and Ni-5at.%W alloys for use as substrates for coated superconductor applications. Two grades of Ni powder with different purities have been used to prepare the initial materials. Addition of W and Mo is found to be beneficial in increasing the volume fraction of the cube component, irrespective of the purity of the Ni powder used. W particularly increases the volume fraction of the cube component in Ni by decreasing the volume fraction of the RD (rolling direction)-rotated cube grains. Studies on partially recrystallized samples indicate that in contrast to pure Ni, in Ni-5at.%W alloy the recrystallized grains are mostly cube oriented right from the beginning of recrystallization

  18. X-ray study of TiNiSn and ZrNiSn intermetallics oxidation

    International Nuclear Information System (INIS)

    Phases formed in the process of oxidizing TiNiSn and ZrNiSn in air at progressively elevated temperatures have been studied by X-ray powder diffraction. The oxidation was found to proceed by different paths for the two isostructural compounds. A general scheme of the oxidation reactions was proposed. (orig.)

  19. The Ni-rich Part of the Ni-P-Sn System: Isothermal Sections

    Science.gov (United States)

    Schmetterer, C.; Vizdal, J.; Kroupa, A.; Kodentsov, A.; Ipser, H.

    2009-11-01

    Due to the use of phosphorus-containing nickel substrates in microelectronics, understanding of their reaction with Sn-based solders and knowledge of the corresponding reaction products is highly important. Therefore the ternary Ni-P-Sn system was investigated experimentally using x-ray diffraction (XRD), scanning electron microscopy (SEM) + energy dispersive x-ray spectroscopy (EDX)/wavelength-dispersive x-ray spectroscopy (WDS), and differential thermal analysis (DTA). Sample preparation was done by alloying powders of the starting components contained in alumina crucibles in evacuated quartz tubes. In this study the phase equilibria in the Ni-rich part of the ternary Ni-P-Sn system are described in the form of three partial isothermal sections at 550°C, 700°C, and 850°C. A total of five ternary compounds exist in the Ni-rich part, and the binary Ni3Sn2 HT phase was found to dissolve 17.6 at.% P at 850°C. This well agrees with literature reports, while a different extent and shape of the large homogeneity range of this phase were found. Between 850°C and 700°C phase equilibria change significantly due to the formation of the ternary phases Ni10P3Sn5 (T3), Ni13P3Sn8 (T4), and Ni2PSn (T5).

  20. Ni(salen): a system that forms many solvates with interacting Ni atoms

    NARCIS (Netherlands)

    Siegler, M.A.M.; Lutz, M.

    2009-01-01

    Recrystallization of [N,N’-Ethylene-bis(salicylideneiminato)]-nickel(II) [Ni(salen)] has been carried out from a large selection of solvents. Crystals can be either solvent free or solvates. This study is based on X-ray crystal structure determinations, which include the redetermination of Ni(salen)

  1. Investigation on microstructures of NiO-YSZ composite and Ni-YSZ cermet for SOFCs

    Energy Technology Data Exchange (ETDEWEB)

    Talebi, Tahereh; Sarrafi, Mohammad Hassan; Haji, Mohsen; Raissi, Babak; Maghsoudipour, Amir [Materials and Energy Research Center, Karaj, Tehran 14155-4777 (Iran)

    2010-09-15

    NiO-YSZ composites and Ni-YSZ cermets were successfully performed for solid oxide fuel cell applications. These composites must have enough porosity and appropriate microstructure for transferring the fuel gases. In this study, ball-milling was used as a simple, cost-effective method for the purpose of mixing the raw materials. The homogeneity of NiO-YSZ composites was examined by Map mode of SEM. NiO-YSZ composites were reduced at the high temperature under the controlled atmosphere to fabricate Ni-YSZ cermet. Variations in the anode phases were investigated by XRD and microstructure and porosity of composites were observed by SEM. Effective parameters like temperatures and the amount of pore former were investigated on open porosity, bulk density, electrical conductivity as well as electrochemical impedance of NiO-YSZ composites and Ni-YSZ cermet. A thin layer of YSZ was deposited by EPD as an electrolyte on NiO-YSZ composites which had various amount of open porosity, to study its effect on the performance of semi-cells by electrochemical impedance. (author)

  2. Combustion Synthesis of NiAl and In-situ Joining to Ni-based Superalloy

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Combustion synthesis is used as a joining technology to join Ni-based superalloys with in-situ synthesized NiAl filler. The synthesis mechanism is discussed. The microstructure of the joints is investigated and the joint strength is also evaluated by tensile testing.

  3. Reduction mechanism of Ni2+ into Ni nanoparticles prepared from different precursors: Magnetic studies

    Indian Academy of Sciences (India)

    R S Ningthoujam; N S Gajbhiye; Sachil Sharma

    2009-03-01

    The reduction mechanism of Ni2+ into Ni particles using different precursors such as NiCl2 solution, NiO powder and Ni[(NH3)6]Cl2 complex has been established. Different particle sizes can be designed from these precursors. The smallest crystallite size (12 nm) can be obtained from Ni[(NH3)6]Cl2 complex in the presence of the stabilizing ligand (oleic acid). The field-cooled (FC) and zero-field-cooled (ZFC) magnetization of Ni particles obtained from Ni[(NH3)6]Cl2 complex in the temperature range 5–300 K established the ferromagnetic interaction up to 300 K. The magnetization values at three different temperatures 5, 70 and 300 K are 50.2, 49.5 and 45.5 Oe respectively at 3 × 104 Oe applied field and such values are less than that of the bulk value. The Curie temperature (c) decreases slightly with the decrease of particle size. This study will provide guidance in the preparation of metal nanoparticles from different precursors.

  4. Probing the semi-magicity of $^{68}$Ni via the $^{3}$H($^{66}$Ni,$^{68}$Ni)p two-neutron transfer reaction in inverse kinematics

    CERN Multimedia

    Reiter, P; Blazhev, A A; Kruecken, R; Franchoo, S; Mertzimekis, T; Darby, I G; Van de walle, J; Raabe, R; Elseviers, J; Gernhaeuser, R A; Sorlin, O H; Georgiev, G P; Bree, N C F; Habs, D; Chapman, R; Gaudefroy, L; Diriken, J V J; Jenkins, D G; Kroell, T; Axiotis, M; Huyse, M L; Patronis, N

    We propose to perform the two-neutron transfer reaction $^{3}$H($^{66}$Ni, $^{68}$Ni)$p$ using the ISOLDE radioactive ion beam at 2.7 $A$ MeV and the MINIBALL + T-REX setup to characterize the 0$^{+}$ and 2$^{+}$ states in $^{68}$Ni.

  5. Hydrides of CeNi5, MmNi5, Ca02(Ce065Mm035)08Ni5, Ca02Ce08Ni5, Ca02Mm08Ni5, and mixed CeNi5/MmNi5

    International Nuclear Information System (INIS)

    Six intermetallic alloys [CeNi5, MmNi5, Ca02(Ce065Mm035)08Ni5, Ca02Ce08Ni5, Ca02Mm08Ni5, and a mixed alloy, CeNi5/MmNi5] were investigated with respect to their suitability to provide high hydrogen capacity and their potential for use in providing substantial hydrogen pressure at both low and high temperatures. A second phase of our investigation dealt with ball-milling and hydriding and dehydriding cycles to produce fine particles for use in hydride powder transfer studies. A summary of several Van't Hoff plots is also included for hydride-forming alloys

  6. The first principle study of Ni2ScGa and Ni2TiGa

    International Nuclear Information System (INIS)

    We computed the electronic structure, elastic moduli, vibrational properties, and Ni2TiGa and Ni2ScGa alloys in the cubic L21 structure. The obtained equilibrium lattice constants of these alloys are in good agreement with available data. In cubic systems, there are three independent elastic constants, namely C11, C12 and C44. We calculated elastic constants in L21 structure for Ni2TiGa and Ni2ScGa using the energy-strain method. The electronic band structure, total and partial density of states for these alloys were investigated within density functional theory using the plane-wave pseudopotential method implemented in Quantum-Espresso program package. From band structure, total and projected density of states, we observed metallic characters of these compounds. The electronic calculation indicate that the predominant contributions of the density of states at Fermi level come from the Ni 3d states and Sc 3d states for Ni2TiGa, Ni 3d states and Sc 3d states for Ni2ScGa. The computed density of states at Fermi energy are 2.22 states/eV Cell for Ni2TiGa, 0.76 states/eV Cell for Ni2ScGa. The vibrational properties were obtained using a linear response in the framework at the density functional perturbation theory. For the alloys, the results show that the L21 phase is unstable since the phonon calculations have imagine modes

  7. Oxide Scales Formed on NiTi and NiPtTi Shape Memory Alloys

    Science.gov (United States)

    Smialek, James L.; Garg, Anita; Rogers, Richard B.; Noebe, Ronald D.

    2011-01-01

    Ni-49Ti and Ni-30Pt-50Ti (at.%) shape memory alloys were oxidized isothermally in air over the temperature range of 500 to 900 C. The microstructure, composition, and phase content of the scales were studied by SEM, EDS, XRD, and metallography. Extensive plan view SEM/EDS identified various features of intact or spalled scale surfaces. The outer surface of the scale was a relatively pure TiO2 rutile structure, typified by a distinct highly striated and faceted crystal morphology. Crystal size increased significantly with temperature. Spalled regions exhibited some porosity and less distinct features. More detailed information was obtained by correlation of SEM/EDS studies of 700 C/100 hr cross-sections with XRD analyses of serial or taper-polishing of plan surfaces. Overall, multiple layers exhibited graded mixtures of NiO, TiO2, NiTiO3, Ni(Ti) or Pt(Ni,Ti) metal dispersoids, Ni3Ti or Pt3Ti depletion zones, and substrate, in that order. The NiTi alloy contained a 3 at.% Fe impurity that appeared in embedded localized Fe-Ti-rich oxides, while the NiPtTi alloy contained a 2 v/o dispersion of TiC that appeared in lower layers. The oxidation kinetics of both alloys (in a previous report) indicated parabolic growth and an activation energy (250 kJ/mole) near those reported in other Ti and NiTi studies. This is generally consistent with TiO2 existing as the primary scale constituent, as described here.

  8. Preparation of NiO–Ni/natural graphite composite anode for lithium ion batteries

    International Nuclear Information System (INIS)

    Highlights: ► We prepare NiO–Ni/natural graphite composite anode for lithium ion battery. ► The composite shows enhanced cycle stability and capacity than NiO–Ni/acetylene black. ► Enhanced cycle stability is due to the fine electronic conductivity of natural graphite. ► Improved capacity is due to the capacity contribution of natural graphite. -- Abstract: Natural graphite was introduced into NiO–Ni that prepared via a simple pyrogenation method to improve the electrochemical performance of the composite due to the advantages of natural graphite over other amorphous carbon materials in terms of fine electronic conductivity, abundance in nature, low cost and better performance of lithium ion storage. The electrochemical performance of the composite as anode for lithium ion battery was characterized via conventional charge/discharge test and cyclic voltammetric measurement. It shows initial discharge and charge capacity of 630 and 478 mAh g−1 at charge/discharge rate of 0.15 C, maintaining of 532 and 522 mAh g−1 after 100 cycles. It can deliver initial discharge and charge capacity of 508 and 504 mAh g−1 at 0.25 C. After 40 cycles at various rates from 0.25 to 2.5 C, the electrode can restore discharge and charge capacity of 472 and 467 mAh g−1 while lowering the charge/discharge rate to 0.25 C. The electrochemical performance of the NiO–Ni/natural graphite composite was compared with that of NiO–Ni/acetylene black, showing much improvement on cycle stability, specific capacity and rate capability

  9. Tuning the magnetic properties of multisegmented Ni/Cu electrodeposited nanowires with controllable Ni lengths

    Science.gov (United States)

    Susano, M.; Proenca, M. P.; Moraes, S.; Sousa, C. T.; Araújo, J. P.

    2016-08-01

    The fabrication of segmented Ni/Cu nanowires (NWs), with tunable structural and magnetic properties, is reported. A potentiostatic electrodeposition method with a single electrolytic bath has been used to fabricate multisegmented Ni/Cu NWs inside a highly hexagonally ordered anodic nanoporous alumina membrane, with diameters of 50 nm and Ni segment lengths (L Ni) tuned from 10 nm up to 140 nm. The x-ray diffraction results evidenced a strong dependence of the Ni NWs crystallographic face-centered-cubic (fcc) texture along the [220] direction on the aspect ratio of the NWs. The magnetic behavior of the multisegmented Ni/Cu NW arrays, as a function of the magnetic field and temperature, is also studied and correlated with their structural and morphological properties. Micromagnetic simulations, together with the experimental results, showed a dominant antiferromagnetic coupling between Ni segments along the wire length for small low aspect-ratio magnetic segments. When increasing the Ni segments’ length, the magnetic interactions between these along the wire became stronger, favouring a ferromagnetic coupling. The Curie temperature of the NWs was also found to strongly depend on the Ni magnetic segment length. Particularly the Curie temperature was found to be reduced 75 K for the 20 nm Ni segments, following the finite-size scaling relation with ξ 0 = 8.1 Å and γ = 0.48. These results emphasize the advantages of using a template assisted method to electrodeposit multilayer NWs, as it allows an easy tailor of the respective morphological, chemical, structural and magnetic properties.

  10. Exchange bias effect in polycrystalline NiO/NiMn{sub 2}O{sub 4} composite

    Energy Technology Data Exchange (ETDEWEB)

    Freitas Cabral, A.J. [Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará (UFPA), Belém, PA (Brazil); Peña Serna, J.; Rache Salles, B.; Novak, M.A. [Instituto de Física, Universidade Federal do Rio de janeiro (UFRJ), Rio de Janeiro, RJ (Brazil); Pinto, A.L. [Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, RJ (Brazil); Rocha Remédios, C.M. [Instituto de Ciências Exatas e Naturais, Universidade Federal do Pará (UFPA), Belém, PA (Brazil)

    2015-05-05

    Highlights: • Antiferromagnetic NiO/ferrimagnetic NiMn{sub 2}O{sub 4} oxide composites. • Grains are well faceted, indicating that the specimen was well crystallized. • The micrographs suggests that NiO and NiMn{sub 2}O{sub 4} may be stuck to each other. • EB effect in NiO/NiMn{sub 2}O{sub 4} oxide composites. • EB effect increases with the amount of NiO. - Abstract: Calcination of aqueous solutions formed by different molar ratios between the nickel and manganese chlorides led to the formation of antiferromagnetic NiO/ferrimagnetic NiMn{sub 2}O{sub 4} oxide composites, as determined by X-ray powder diffraction technique and Rietveld refinement. Low temperature zero field cooled and field cooled magnetic hysteresis cycles show an exchange bias effect, presumably due to interaction at the interfaces between the antiferromagnetic and ferrimagnetic materials.

  11. Corrosion performance of bi-layer Ni/Cr2C3-NiCr HVAF thermal spray coating

    Science.gov (United States)

    Sadeghimeresht, E.; Markocsan, N.; Nylén, P.; Björklund, S.

    2016-04-01

    The corrosion behavior of three HVAF thermal spray coating systems (A: single-layer Ni, B: single-layer Cr2C3-NiCr coatings, and C: bi-layer Ni/Cr2C3-NiCr coating) was comparatively studied using immersion, salt spray, and electrochemical tests. Polarization and EIS results showed that the corrosion behavior of Cr2C3-NiCr coatings in 3.5 wt.% NaCl solution was significantly improved by adding the intermediate layer of Ni. It was illustrated that the polarization resistance of the bi-layer Ni/Cr2C3-NiCr and single-layer Cr2C3-NiCr coatings were around 194 and 38 kΩ cm2, respectively. Microstructure analysis revealed that the bond coating successfully prevented the corrosion propagation toward the coating.

  12. Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

    International Nuclear Information System (INIS)

    Electrochemical reaction of Ni(II)/Ni was investigated in a hydrophobic room-temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing Ni(TFSA)2 as a Ni source. The UV-vis spectra showed that Ni(II) in BMPTFSA is octahedrally coordinated with TFSA- anions. The average activation energy for the diffusion coefficients of this Ni(II) complex was ∼26 kJ mol-1, which was close to that for the viscosity. The diffusion coefficient of Ni(II) was estimated to be 9.3 x 10-8 cm2 s-1. Chronoamperometric measurements showed that the electrodeposition of Ni on a platinum substrate involved three-dimensional instantaneous nucleation under diffusion control at room-temperature. The electrodeposits obtained by galvanostatic electrolysis with the current density of -0.046 mA cm-2 at 70 and 100 deg. C were identified as metallic Ni by XRD.

  13. Hydrogen absorption kinetics and structural properties of Mg85Ni10Ca5 and Mg90Ni10

    International Nuclear Information System (INIS)

    Mg85Ni10Ca5 and Mg90Ni10 were prepared by melting mixtures of the elements in mild steel crucibles and pouring them into copper molds. Hydrogen absorption kinetics and structural properties of the alloys were characterized by the volumetric method using a Sievert's apparatus, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The crystallite size of Mg in Mg85Ni10Ca5, which is evaluated by XRD peak broadening, is about 50% smaller than that in Mg90Ni10. In addition, the nanometer-scale structure composed of Mg, Mg2Ni, Mg2Ca was observed in Mg85Ni10Ca5. Mg85Ni10Ca5 shows better hydrogen absorption kinetics than Mg90Ni10 in the temperature range of room temperature to 573 K. The better absorption kinetics of Mg85Ni10Ca5 is mainly attributed to the nanometer-scale structure

  14. 2-D ACAR measurements of Ni3A1

    International Nuclear Information System (INIS)

    In connection with a detailed study of the electronic structure and stability of the aluminides (Ni,Fe)3Al, 2-D ACAR positron annihilation measurements were made on a Ni3Al single crystal to study the Fermi surface. The results for Ni3Al have been compared with results for pure Ni. Strong similarities were found for the electronic structures of these materials. Theoretical calculations of the Fermi surface for Ni3Al are in good agreement with the experimental results. The Γ16 sheet, not previously observed in any experiment, has now been observed for the first time in Ni3Al. 14 refs., 10 figs

  15. Solidification shrinkage of Ni-Cr alloys

    Energy Technology Data Exchange (ETDEWEB)

    Xiao Feng [Materials Interfacial Physical-Chemistry Research Institute, Chongqing Institute of Technology, No. 4 Xingsheng Road, Yangjiaping, Chongqing 400050 (China); Yang Renhui [Materials Interfacial Physical-Chemistry Research Institute, Chongqing Institute of Technology, No. 4 Xingsheng Road, Yangjiaping, Chongqing 400050 (China)]. E-mail: yangrh2004@21cn.com; Fang Liang [Department of Applied Physics, Chongqing University, No. 174 Shazhong Road, Shapingba, Chongqing 400044 (China); Zhang Chi [Materials Interfacial Physical-Chemistry Research Institute, Chongqing Institute of Technology, No. 4 Xingsheng Road, Yangjiaping, Chongqing 400050 (China)

    2006-07-25

    Ni-Cr superalloy is widely used in casting of critical components in gas-turbine engines. Because of the significant change in density of alloy in mushy state, porosity is likely to arise in the alloy parts due to the solidification shrinkage. On the other hand, because Ni-Cr alloy is very hard and difficult to be machined, the net-shape casting of the alloy is a cheap process. Therefore, it is essential to measure the solidification shrinkage of mushy alloy for obtaining low-cost net-shape casting ingot without inner porosity. However, there have been a few reports on the solidification shrinkage of the liquid Ni-Cr alloy. In this work, the solidification shrinkage of Ni-Cr alloy was calculated by measuring its density using modified sessile drop method. It has been found that, for Ni-(0-24.53)% Cr alloys, the solidification shrinkage value fluctuates in the range of 0.91-2.02% and it tends to increase with increasing Cr concentration in 0-10% Cr. However, for Cr concentration more than 10%, the solidification shrinkage holds on a certain value of 2.00%.

  16. Effect of silicon on oxidation of Ni-15Al alloy

    Institute of Scientific and Technical Information of China (English)

    WU Ying; NIU Yan; WU Wei-tao

    2005-01-01

    The oxidation of binary Ni-Al alloy containing 15% (mole fraction, the same below if not mentioned)Al (Ni-15Al), and of a ternary alloy with the same Al content but also containing 4% Si (Ni-4Si-15Al) has been studied at 1 000 ℃ under 1.0× 105Pa O2 to examine the effect of the addition of Si on the oxidation of Ni-15Al. Oxidation of Ni-15Al produces a duplex scale composed of an outer NiO layer and an inner layer riched in Al2O3. On the contrary, Ni-4Si-15Al forms an external alumina layer directly in contact with the alloy presenting only trace of NiO and the Ni-Al spinel. As a result, the kinetics of Ni-15Al shows a fast initial stage followed by two subsequent parabolic stages with decreasing rate constants, while Ni-4Si-15Al presents essentially a single nearly-parabolic behavior with a rate constant similar to that of the final stage of Ni-15Al. Therefore, the addition of 4% Si significantly reduces the oxidation rate during the initial stage by preventing the formation of Ni-riched scales and promoting an earlier development of an exclusive external alumina layer on the alloy surface.

  17. Transformation to Ni5Al3 in a 63.0 at. pct Ni-Al alloy

    Science.gov (United States)

    Khadkikar, P. S.; Locci, I. E.; Vedula, K.; Michal, G. M.

    1993-01-01

    Microstructures of 63 at. pct P/M Ni-Al alloys with a composition close to the stoichiometry of the Ni5Al3 phase were investigated using homogenized and quenched specimens aged at low temperatures for various times. Results of analyses of XRD data and electron microscopy observations were used for quantitative phase analysis, performed to calculate the (NiAl + Ni5Al3)/Ni5Al3 phase boundary locations. The measured lattice parameters of Ni5Al3 phase formed at 823, 873, and 923 K indicated an increase in tetragonality of the phase with increasing nickel content.

  18. Room temperature isotherms for Mo and Ni

    International Nuclear Information System (INIS)

    Isotherms at room temperature for Mo and Ni are proposed. They are of three types: BIRCH, KEANE and BORN-MIE. The adjustable constants appearing in these isotherms have been determined from experimental quantities at zero pressure. An evaluation of the limit of (δBT/δP)T as P #-> # ∞, where BT is the isothermal bulk modulus, has been also used. These three isotherms obtained for Mo and Ni are compared with isotherms derived from shock-wave data according to the PRIETO's model. There is a good agreement between these and these derived from shock-wave data. The three isotherms proposed for Mo and Ni can be considered as valid until pressures of several BTo, where BTo is the bulk modulus BT at P = o

  19. Voz del niño

    OpenAIRE

    Urra-Barandiarán, A. (Ainhoa); Vázquez-de-la-Iglesia, F. (Francisco); Fernandez-Gonzalez, S. (Secundino); Molina, M.T. (M.T.)

    2006-01-01

    En el curso de la vida la voz sufre diferentes cambios que obedecen a factores de desarrollo y en los que intervienen de manera decisiva el sistema nervioso y el sistema hormonal. La voz del niño y, por tanto la disfonía en el niño requiere una evaluación precisa y específica, no sólo desde el punto de vista instrumental sino también perceptual y en evaluación logopédica. Se insiste en la protocolización de elaboración de trastornos de voz en el niño, la revisión de los f...

  20. Kinetics of Ni3Si2 Formation in the Ni2Si-NiSi Thin Film Reaction from in situ Measurements

    Energy Technology Data Exchange (ETDEWEB)

    Kittl,J.; Pawlak, M.; Torregiani, C.; Lauwers, A.; Demeurisse, C.; Vrancken, C.; Absil, P.; Biesemens, S.; Detavernier, C.; et al

    2007-01-01

    The kinetics of Ni3Si2 formation in the Ni2Si-NiSi thin film reaction were determined from simultaneous in situ x-ray diffraction (XRD) measurements, performed using a synchrotron source, and sheet resistance measurements. Samples consisted of 90 nm Ni/100 nm polycrystalline-Si/SiO2 stacks, of interest for fully silicided gate applications, on (100) Si. After initial formation of a Ni2Si/NiSi bilayer, these films reacted to form Ni3Si2. The evolution of sheet resistance and of the intensity of XRD peaks were used to extract the fraction of Ni3Si2 formed during ramp and isothermal annealings. A Kissinger analysis was performed for ramp annealing with ramp rates of 1, 3, 5, 9, and 27 C/s, obtaining the activation energy of Ni3Si2 formation, Ea = 1.92{+-}0.15 eV. A Kolmogorov-Johnson-Mehl-Avrami analysis was performed for isothermal anneals, finding an Avrami exponent of 2.1{+-}0.2, suggesting two-dimensional growth. This is consistent with a nucleation controlled process for Ni3Si2 formation, with nucleation sites at different positions in the thin film, and subsequent lateral two-dimensional propagation of the transformation front parallel to the film surface. Implications for Ni fully silicided gate applications are discussed.

  1. Fully gapped superconductivity in Ni-pnictide superconductors BaNi2As2 and SrNi2P2

    International Nuclear Information System (INIS)

    We have performed low-temperature specific heat C and thermal conductivity κ measurements on the Ni-pnictide superconductors BaNi2As2 (Tc = 0.7K) and SrNi2P2 (Tc = 1.4K). The temperature dependences C(T) and κ(T) of the two compounds are similar to the results of a number of s-wave superconductors. Furthermore, the concave field responses of the residual κ for BaNi2As2 rules out the presence of nodes on the Fermi surfaces. We postulate that fully gapped superconductivity could be universal for Ni-pnictide superconductors. Specific heat data on Ba0.6La0.4Ni2As2 shows a mild suppression of Tc and Hc2 relative to BaNi2As2.

  2. Application of Nanocrystalline LaNi5-type Hydrogen Absorbing Alloys in Ni-MHx Batteries

    Institute of Scientific and Technical Information of China (English)

    Jurczyk M; Nowak M

    2004-01-01

    The structure and electrochemical properties of nanocrystalline LaNi5-type alloys were studied. These materials were prepared by mechanical alloying (MA) followed by annealing. The properties of hydrogen host materials can be modified substantially by alloying to obtain the desired storage characteristics. It was found that the partial substitution of Ni by Al or Mn in LaNi5-xMx alloy leads to an increase in discharge capacity. The alloying elements such as Al, Mn and Co greatly improved the cycle life of LaNi5 material. For example, in the nanocrystalline LaNi3.75Mn0.75Al0.25Co0.25 powder, discharge capacity up to 258 mAh·g-1 was measured (at 40 mA·g-1 discharge current). Furthermore,the effect of the graphite coating on the structure of some nanocrystalline alloys and the electrodes characteristics were investigated. The mechanical coating with graphite effectively reduced the degradation rate of the studied electrode materials. The combination of a nanocrystalline LaNi5-type hydride electrodes and a nickel positive electrode to form a Ni-MH battery, was successful.

  3. Blending Cr2O3 into a NiO-Ni electrocatalyst for sustained water splitting.

    Science.gov (United States)

    Gong, Ming; Zhou, Wu; Kenney, Michael James; Kapusta, Rich; Cowley, Sam; Wu, Yingpeng; Lu, Bingan; Lin, Meng-Chang; Wang, Di-Yan; Yang, Jiang; Hwang, Bing-Joe; Dai, Hongjie

    2015-10-01

    The rising H2 economy demands active and durable electrocatalysts based on low-cost, earth-abundant materials for water electrolysis/photolysis. Here we report nanoscale Ni metal cores over-coated by a Cr2 O3 -blended NiO layer synthesized on metallic foam substrates. The Ni@NiO/Cr2 O3 triphase material exhibits superior activity and stability similar to Pt for the hydrogen-evolution reaction in basic solutions. The chemically stable Cr2 O3 is crucial for preventing oxidation of the Ni core, maintaining abundant NiO/Ni interfaces as catalytically active sites in the heterostructure and thus imparting high stability to the hydrogen-evolution catalyst. The highly active and stable electrocatalyst enables an alkaline electrolyzer operating at 20 mA cm(-2) at a voltage lower than 1.5 V, lasting longer than 3 weeks without decay. The non-precious metal catalysts afford a high efficiency of about 15 % for light-driven water splitting using GaAs solar cells. PMID:26307213

  4. Corrosion and wear resistance study of Ni-P and Ni-P-PTFE nanocomposite coatings

    Science.gov (United States)

    Ankita, Sharma; Singh, Ajay

    2011-09-01

    This article reports on the corrosion and wear resistance of Ni-P and Ni-P-PTFE nanocomposite coatings deposited on mild steel substrates using the electroless plating technique. The coatings were characterized by scanning electron microscopy (SEM), energy dispersive analysis of X-Ray (EDAX), and X-ray diffractometry (XRD). The coatings were smooth and had thicknesses between 7 and 23 µm. They contained Ni, P, and additionally, F, in the case of the Ni-P-PTFE films. A broadening of the Ni peak in XRD was attributed to the amorphous nature and/or fine grain size of the films. Corrosion resistance was measured using immersion and electrochemical polarization tests in 3.5% NaCl solution whereas wear resistance was determined by the pin-on-disc method. Both Ni-P and Ni-P-PTFE coatings exhibited significant improvement in corrosion (in salty media) and wear behavior. Furthermore, the addition of PTFE in the coatings showed improvement in their corrosion resistance as well as a reduction in friction coefficient. Our testing revealed that the coatings' wore out following the "adhesive type" mechanism.

  5. Radiation-induced segregation in diluted NiSi and NiGe alloys. Bestrahlungsinduzierte Segregation in verduennten NiSi- uns NiGe-Legierungen

    Energy Technology Data Exchange (ETDEWEB)

    Weigert, M.

    1987-05-12

    By means of 3 MeV electron radiation the radiation-induced Si or Ge enrichment at point defect sinks of dilute NiSi and NiGe alloys (45-496 atppm) was investigated by the ensueing reduction of the concentration of extra-lattice Si or Ge atoms. The concentration of the detached foreign atoms is analyzed by reciprocal damage rates in the temperature range II. In this process the migrating interstitial atoms which are able to form stable and immobile complexes with the foreign atoms, are used as probes for determining the concentration of detached foreign atoms.

  6. Separation of radiation defects in Ni and Ni-C alloys under electron and neutron irradiation

    Science.gov (United States)

    Arbuzov, S. E.; Danilov, V. L.; Goshchitskii, B. N.; Kar'kin, A. E.; Parkhomenko, V. D.

    2016-02-01

    Complex investigations of radiation damage of Ni and Ni- 880 at. ppm C alloy under electron and neutron irradiation in the region of room temperature hardened and deformed state. In pure nickel, with the deformation microstructure, both in electron and in the neutron irradiation is observed separation of radiation-induced defects. When electron irradiation in the alloy Ni-C separation effect is observed, and when neutron irradiation there is no. This is due to the interaction of carbon atoms with radiation defects. The main sinks for radiation-induced defects are the areas with a high concentration of defects in cascades of atomic displacements.

  7. Synthesis of TiNi/Ti2Ni Composite Particles in Molten Salts

    Institute of Scientific and Technical Information of China (English)

    YANG Rui-song; CUI Li-shan; ZHENG Yan-jun

    2006-01-01

    A new process of synthesizing TiNi/Ti2Ni composite particles, high temperature molten salts method, is introduced. This method uses molten salts as a reaction medium that does not take part in the chemical reaction and can be easily dissolved in rinsing water. According this method, the composite particles were prepared in molten salts at 700 ℃-900 ℃. By means of differential scanning calorimetry (DSC), the reversible martensitic transformation of TiNi particles in these composite particles was confirmed.

  8. Participar como niña o niño en el mundo social

    OpenAIRE

    Silvia Paulina Díaz

    2010-01-01

    En este artículo presento la participación como resultado de un trabajo investigativo realizado durante el año 2007, con niños y niñas escolarizados habitantes de la ciudad de Medellín, Colombia, cuyo objetivo fue analizar las representaciones sociales que ellos y ellas comparten sobre el ejercicio ciudadano. El análisis de la información tiene como ejes fundamentales, la salud colectiva, la sociología de la infancia y la participación en la niñez, en una aproximación que se realiza desde un ...

  9. THICKNESS DEPENDENCE OF MAGNETIZATION AND MAGNETOSTRICTION OF NiFe AND NiFeRh FILMS

    OpenAIRE

    Ounadjela, K.; Lefakis, H.; Speriosu, V.; Hwang, C.; Alexopoulos, P.

    1988-01-01

    The saturation magnetization, 4πMs, and the magnetostriction constant, λ, of Ni81Fe19, Ni81Fe19/Ta and Ni72Fe17Rh11/ Ta thinfilms were studied as a function of film thickness before and after annealing. For films of thickness t < 200 Å, 4πMs, and λs were found to be strongly dependent on film thickness with even larger variation after annealing. Auger depth profiles have shown the existence of inhomogeneous interfacial layer at the film surface, Ta/film and film/substrate interfaces. The pres...

  10. Structure characterization of Ni/NiO and Ti/TiO2 interfaces

    International Nuclear Information System (INIS)

    This research thesis reports the structure characterization of Ni-NiO and Ti-TiO2 interfaces through an in-situ investigation of thin blade oxidation, of oxide germination and growth, and through a determination of mutual metal/oxide orientation relationships. Thin films of TiO2 have also been characterized and the study of the influence of vacuum annealing on TiO2 layer structure and morphology has been attempted. The examination of metal-oxide interface reveals a duplex structure of NiO and TiO2 layers, and a preferential grain boundary oxidation of the underlying metal

  11. Air oxidation of Cu-50Ni and Cu-70Ni alloys at 800℃

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The air oxidation of Cu-Ni alloys with 50% and 70% nickel (mole fraction) at 800℃ was studied. The kinetic curves for the oxidation of the two alloys are complex and deviate from the parabolic rate law. Typical double-layered scales are produced, which consist of a CuO outer layer and an inner layer containing a mixture of Cu2O and NiO with many pores. Cu-50Ni presents a small degree of internal oxidation of nickel, which is observed in many binary double-phase systems, but is quite rare in single phase systems.

  12. Microstructure of Ni-Al powder and Ni-Al composite coatings prepared by twin-wire arc spraying

    Institute of Scientific and Technical Information of China (English)

    Ji-xiao Wang; Gui-xian Wang; Jing-shun Liu; Lun-yong Zhang; Wei Wang; Ze Li; Qi-xiang Wang; Jian-fei Sun

    2016-01-01

    Ni–Al powder and Ni–Al composite coatings were fabricated by twin-wire arc spraying (TWAS). The microstructures of Ni-5wt%Al powder and Ni-20wt%Al powder were characterized by scanning electronic microscopy (SEM) and energy dispersive spec-troscopy (EDS). The results showed that the obtained particle size ranged from 5 to 50μm. The morphology of the Ni–Al powder showed that molten particles were composed of Ni solid solution, NiAl, Ni3Al, Al2O3, and NiO. The Ni–Al phase and a small amount of Al2O3 parti-cles changed the composition of the coating. The microstructures of the twin-wire-arc-sprayed Ni–Al composite coatings were characterized by SEM, EDS, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results showed that the main phase of the Ni-5wt%Al coating consisted of Ni solid solution and NiAl in addition to a small amount of Al2O3. The main phase of the Ni-20wt%Al coating mainly consisted of Ni solid solution, NiAl, and Ni3Al in addition to a small amount of Al and Al2O3, and NiAl and Ni3Al intermet-allic compounds effectively further improved the final wear property of the coatings. TEM analysis indicated that fine spherical NiAl3 pre-cipitates and a Ni–Al–O amorphous phase formed in the matrix of the Ni solid solution in the original state.

  13. Nanomechanical properties of a Ni nanodot-patterned surface

    International Nuclear Information System (INIS)

    Nanomechanical properties of a Ni nanodot-patterned surface (NDPS) on a Si substrate were investigated using nanoindentation. The Ni NDPS was fabricated by thermal evaporation of Ni through a porous anodized aluminum oxide template onto a Si substrate. Plan-view transmission electron microscopy and nanobeam diffraction were used to characterize the Ni nanodot crystal structure. Scanning electron microscopy and atomic force microscopy were used to characterize the morphology and deformation of the Ni nanodots before and after nanoindentation. The elastic modulus and hardness of the Ni nanodots were found to be 159 ± 22 and 7.7 ± 1.0 GPa, respectively. The critical shear stress for initiating plastic deformation in the Ni nanodot was estimated to be 8.3 ± 1.0 GPa, which is close to the theoretical shear strength of 7.6 GPa in dislocation-free single crystal Ni

  14. Electrochemical performance study of Ni/Ni-GDC double-layer anode-supported IT-SOFC%Ni/Ni-GDC双层阳极支撑型IT-SOFC性能研究

    Institute of Scientific and Technical Information of China (English)

    郭桂平; 彭开萍

    2015-01-01

    采用硝酸盐-柠檬酸溶胶-凝胶低温自蔓延燃烧法制备GDC粉末,用共压法制备了NiO-GDC单层阳极、NiO/NiO-GDC双层阳极及其单电池,并测试了其性能。研究结果表明:经H2还原后,Ni/Ni-GDC双层阳极外层为多孔结构,由粒径较大的Ni粒子团形成了稳定的电子电导通道及燃料通道;内层孔隙较小、较少,Ni均匀分布于GDC构成的支撑骨架中。Ni/Ni-GDC双层阳极的孔隙率及电导率都高于Ni-GDC单层阳极,从450~700℃,其电导率比Ni-GDC单层阳极都稳定高出15%~20%。单电池的测试结果表明:Ni/Ni-GDC双层阳极支撑单电池在700、650、600℃的最大功率密度分别为0.383、0.329、0.204 W/cm2,比Ni-GDC单层阳极支撑单电池分别高出了8.95%、79.38%、84.76%。Ni/Ni-GDC双层阳极支撑单电池具有比Ni-GDC单层阳极支撑单电池更高的中温、特别是低温电化学性能。%GDC electrolyte powder was synthesized by nitrate-citric acid sol-gel auto combustion method in low temperature. NiO-GDC single-layer anode, NiO/NiO-GDC double-layer anode and their single cells were prepared by co-pressing, then their properties were tested. The test results show that after reduction by H2, the outer layer of the Ni/Ni-GDC double-layer anode is porous and stable electronic conductivity channel and fuel channel is formed by the Ni particle groups with large size. In the inner layer, pores are less and smal er, and Ni particles distribute uniformly in the skeleton structure formed by GDC particle. Both the porosity and conductivity of Ni/Ni-GDC double-layer anode are higher than Ni-GDC single-layer anode; its conductivities from 450 to 700℃are al 15%~20%higher than Ni-GDC single-layer anode. The single celltest shows that the peak power densities of Ni/Ni-GDC double-layer anode-supported single cellat temperature 700, 650 and 600℃are respectively 0.383, 0.329 and 0.204 W/cm2, which are respectively 8.95%, 79.38%, 84

  15. Fabrication of CdTe/NiTe films on Ni foils by radio-frequency magnetron sputtering method

    International Nuclear Information System (INIS)

    Highlights: • The effects of Ts on CdTe deposited on Ni by magnetron sputtering is investigated. • An effective method is studied of making CdTe/NiTe without post-treatment. • As-prepared CdTe/NiTe raised optical absorption and PEC properties. • Pre-deposited Te can react with Ni to generate NiTe at Ts = 350 °C. - Abstract: Cadmium Telluride (CdTe) semiconductor thin films are fabricated on flexible Ni foil substrates using radio-frequency (RF) magnetron sputtering under different substrate temperatures. The crystal structure and properties of the prepared functional thin films were characterized with series analysis technologies. The characterization results revealed that Nickel Telluride (NiTe) phase formatted at the interface of CdTe and Ni substrate when substrate temperature (Ts) is 450 °C. Specially, XRD results demonstrated that CdTe/NiTe films could also be obtained by pre-depositing Te film on Ni and reducing Ts to 350 °C. The investigation on optical and photoelectrochemical (PEC) properties of the products illustrated that compact CdTe/NiTe films had improved the absorption in the visible region. Furthermore, PEC measurements indicated that CdTe/NiTe/Ni photoelectrode can have a promising application in photovoltaic devices

  16. Hydrogenation of Ethyl Acetate to Ethanol over Ni-Based Catalysts Obtained from Ni/Al Hydrotalcite-Like Compounds

    Directory of Open Access Journals (Sweden)

    Longfei Jiang

    2010-07-01

    Full Text Available A series of Ni-based catalysts were prepared using hydrogen reduction of Ni/Al hydrotalcite-like compounds (Ni/Al HTlcs synthesized by coprecipitation. The physico-chemical properties of Ni/Al hydrotalcite-like compounds and the corresponding Ni-based catalysts were characterized using inductively coupled plasma (ICP, BET surface areas, X-ray diffraction (XRD, Fourier transform infrared (FTIR spectroscopy and scanning electron microscopy (SEM techniques. The results indicated that Ni/Al HTlcs with layered structures could be successfully prepared by the coprecipitation method, and the characteristic HTlcs reflections were also observed in the XRD analysis. The NiO and Ni0 phases were identified in all Ni-based catalysts, which displayed randomly interconnected pores and no layer structures. In addition, the studies also found the Ni/Al HTlcs and Ni-based catalysts had high specific surface areas, low pore volumes and low pore diameters. The catalytic hydrogenation of ethyl acetate to ethanol with Ni-based catalysts was also investigated. Among the studied catalysts, RE1NASH-110-3 showed the highest selectivity and yield of ethyl acetate to ethanol, which were 68.2% and 61.7%, respectively. At the same time, a major by-product, butyl acetate, was formed due to an ester-exchange reaction. A proposed hydrogenation pathway for ethyl acetate over Ni-based catalysts was suggested.

  17. The study of quasi-projectiles produced in Ni+Ni and Ni+Au collisions: excitation energy and spin

    International Nuclear Information System (INIS)

    During the collision between the projectile and the target nuclei in the intermediate energy regime (E < 100 MeV/nucleon) two excited nuclei are mainly observed in the exit channel, the quasi projectile (QP) and the quasi target. They disintegrate by particle emission. However, this binary picture is perturbed by the emission of particles and light fragments with velocities intermediate between the projectile velocity and the target one, all along the interaction (midrapidity component). This work aim to determine the excitation energy and the intrinsic angular momentum (or spin) of quasi-projectiles produced in the Ni+Ni and Ni+Au collisions at 52 and 90 MeV/nucleon. The excitation energy is deduced from the kinematical characteristics of particles emitted by the quasi-projectile. They have to be separated from midrapidity particles. Three different scenarios have been used for this purpose. The spin of the quasi-projectile has been extracted from the experimental data by mean of proton and alpha particles multiplicities emitted by the QP in the Ni+Au at 52 MeV/nucleon reaction. The results have been compared to the predictions of a theoretical model based on nucleon transfers. Their evolution is qualitatively reproduced as a function of the violence of the collision. (author)

  18. Application of 61Ni Moessbauer spectroscopy to chemical problems

    International Nuclear Information System (INIS)

    Using the possibility to produce 61Co sources at the MAinz Microtron, 61Ni Moessbauer spectroscopy was applied to different kinds of chemical problems. Measurements of isomer shifts and Vzz values in some common compounds and compounds with unusual chemical bonding for comparison with band structure calculations, measurement of 61Ni Moessbauer parameters in model compounds for hydrogenase and dehydrogenase with an active [NiS4] centre, and study of novel binary NiF3 compounds at helium temperature are presented

  19. Mixed conductor anodes: Ni as electrocatalyst for hydrogen conversion

    DEFF Research Database (Denmark)

    Primdahl, S.; Mogensen, Mogens Bjerg

    2002-01-01

    Five types of anodes for solid oxide fuel cells (SOFC) are examined on an yttria-stabilised zirconia (YSZ) electrolyte by impedance spectroscopy at 850 degreesC in hydrogen. The examined porous anodes are a Ni/Zr(0.92)Y(0.16)O(2.08) (Ni/YSZ) cermet, a Ni/Ce(0.9)Gd(0.1)O(1.95) (Ni/CGI) cermet, a Ce...

  20. Kinetics of NiO and NiCl2 hydrogen reduction as precursors and properties of produced Ni/Al2O3 and Ni-Pd/Al2O3 catalysts.

    Science.gov (United States)

    Sokić, Miroslav; Kamberović, Željko; Nikolić, Vesna; Marković, Branislav; Korać, Marija; Anđić, Zoran; Gavrilovski, Milorad

    2015-01-01

    The objects of this investigation were the comparative kinetic analysis of the NiO and NiCl2 reduction by hydrogen during an induction period and elimination of the calcination during the synthesis of Ni/Al2O3 catalysts. The effect of temperature and time on NiO and NiCl2 reduction degrees was studied. Avrami I equation was selected as the most favorable kinetic model and used to determine activation energy of the NiO and NiCl2 reduction for the investigated temperature range (623-923 K) and time intervals (1-5 minutes). The investigation enabled reaching conclusions about the reaction ability and rate of the reduction processes. Afterward, Ni/Al2O3 catalysts were obtained by using oxide and chloride precursor for Ni. The catalysts were supported on alumina-based foam and prepared via aerosol route. Properties of the samples before and after low-temperature hydrogen reduction (633 K) were compared. Obtained results indicated that the synthesis of Ni/Al2O3 catalysts can be more efficient if chloride precursor for Ni is directly reduced by hydrogen during the synthesis process, without the calcination step. In addition, Ni-Pd/Al2O3 catalysts with different metal content were prepared by using chloride precursors. Lower reduction temperature was utilized and the chlorides were almost completely reduced at 533 K. PMID:25789335

  1. Initial growth of Au on Ni(110): Surface alloying of immiscible metals

    DEFF Research Database (Denmark)

    Nielsen, L. Pleth; Besenbacher, Flemming; Stensgaard, I.;

    1993-01-01

    Atomic resolution scanning tunneling microscopy of Au deposited on Ni(110) shows that even though Au is completely insoluble in bulk Ni, it replaces Ni in the first surface layer forming a surface Au-Ni alloy and the squeezed out Ni atoms agglomerate in Ni islands on the surface. This picture is...

  2. The evolution of phase transformation in Ni/Ni3Al laminated composite under high temperature treatments

    Science.gov (United States)

    Shmorgun, V.; Gurevich, L.; Bogdanov, A.; Trunov, M.

    2016-02-01

    In this study the impact of isothermal annealing on the phase transformation rate in laminated Ni/Ni2Al3 composite was investigated. The method of nickel-aluminide coatings of the required chemical composition fabrication was proposed.

  3. Gel-combustion synthesis of NiO-MoO3 mixtures and their reduction to Ni-Mo alloys

    International Nuclear Information System (INIS)

    The oxide mixtures xNiO-(1 - x)MoO3 (0.2 ≤ x ≤ 1) were synthesized by gel-combustion procedure, using mixed aqueous solutions of ammonium molybdate, nickel nitrate and citric acid as the precursor solution. The oxide products were characterized by scanning electron microscopy and X-ray diffractometry. The X-ray diffractograms indicated the presence of NiMoO4 and either NiO or MoO3 in the oxide products. By heating in hydrogen atmosphere, the oxide mixtures were transformed into Ni-Mo alloys. Thermogravimetric study of the reduction procedure evidenced that temperature indispensable to complete reduction increased progressively from 400 to 900 deg. C if x decreased from 1 toward 0. The structure of Ni-Mo alloys was examined by X-ray diffractometry, and the following alloys were evidenced: Ni(Mo) solid solutions, Ni4Mo, and NiMo

  4. Controlled synthesis of Ni/CuOx/Ni nanowires by electrochemical deposition with self-compliance bipolar resistive switching

    OpenAIRE

    Kyuhyun Park; Jang-Sik Lee

    2016-01-01

    We demonstrate synthesis of Ni/CuOx/Ni nanowires (NWs) by electrochemical deposition on anodized aluminum oxide (AAO) membranes. AAO with pore diameter of ~70 nm and pore length of ~50 μm was used as the template for synthesis of NWs. After deposition of Au as the seed layer, NWs with a structure of Ni/CuOx/Ni were grown with a length of ~12 μm. The lengths of 1st Ni, CuOx, and 2nd Ni were ~4.5 μm, ~3 μm, and ~4.5 μm, respectively. The Ni/CuOx/Ni device exhibits bipolar resistive switching be...

  5. From Water Oxidation to Reduction: Transformation from Ni(x)Co(3-x)O4 Nanowires to NiCo/NiCoO(x) Heterostructures.

    Science.gov (United States)

    Yan, Xiaodong; Li, KeXue; Lyu, Lu; Song, Fang; He, Jun; Niu, Dongmei; Liu, Lei; Hu, Xile; Chen, Xiaobo

    2016-02-10

    A homologous Ni-Co based nanowire catalyst pair, composed of Ni(x)Co(3-x)O4 nanowires and NiCo/NiCoO(x) nanohybrid, is developed for efficient overall water splitting. Ni(x)Co(3-x)O4 nanowires are found as a highly active oxygen evolution reaction (OER) catalyst, and they are converted into a highly active hydrogen evolution reaction (HER) catalyst through hydrogenation treatment as NiCo/NiCoO(x) heteronanostructures. An OER current density of 10 mA cm(-2) is obtained with the Ni(x)Co(3-x)O4 nanowires under an overpotential of 337 mV in 1.0 M KOH, and an HER current density of 10 mA cm(-2) is obtained with the NiCo/NiCoO(x) heteronanostructures at an overpotential of 155 mV. When integrated in an electrolyzer, these catalysts demonstrate a stable performance in water splitting. PMID:26784862

  6. Thermal stability of electrodeposited Ni and Ni-Co layers; an EBSD-study

    DEFF Research Database (Denmark)

    Rasmussen, Anette Alsted; Gholinia, A.; Trimby, P.W.; Somers, Marcel A.J.

    The influence of heat treatment on the microstructure and the microtexture of electrodeposited Ni and Ni-Co layers was investigated with Electron Backscatter Diffraction (EBSD) with high resolution. Samples were annealed for 1 hour at 523 K and 673 K, the temperature region wherein recrystallisat...... recrystallisation occurs. The results are discussed in relation to the resolution of EBSD for the very fine grained electrodeposits and previous X-ray diffracton investigations.......The influence of heat treatment on the microstructure and the microtexture of electrodeposited Ni and Ni-Co layers was investigated with Electron Backscatter Diffraction (EBSD) with high resolution. Samples were annealed for 1 hour at 523 K and 673 K, the temperature region wherein...

  7. Microscopic domain structures in unidirectional and isotropic exchange-coupled NiO/NiFe bilayers

    International Nuclear Information System (INIS)

    The dependence on nickel oxide thickness in unidirectional and isotropic exchange-coupled NiO/NiFe bilayer films was investigated by magnetic force microscopy to better understand exchange biasing at microscopic length scales. As the NiO thickness increased, the domain structure of unidirectional biased films formed smaller and more complex in-plane domains. By contrast, for the isotropically coupled films, large domains generally formed with increasing NiO thickness including a new cross type domain with out-of-plane magnetization orientation. The density of the cross domain is proportional to exchange biasing field, and the fact that the domain mainly originated from the strongest exchange coupled region was confirmed by imaging in an applied external field during a magnetization cycle

  8. Transformation characteristics of TiNi/TiNi alloys synthesized by explosive welding

    Institute of Scientific and Technical Information of China (English)

    LI Juntao; ZHENG Yanjun; CUI Lishan

    2007-01-01

    Effects of severe deformation and heat treatment on the transformation behaviors of explosively welded duplex TiNi/TiNi shape memory alloys(SMAs)were investigated by the differential scanning calorimeter (DSC).The explosively welded duplex TiNi/TiNi plate of 0.7mm in thickness was cold-rolled at room temperature to the extent of 60%reduction in thickness and then annealed at different temperatures (573-973K)for different time(15min-10h).Low temperature(623-723K)heat treatment led to amorphous crystallization.At higher temperature(873K),the re-crystallization took place in the specimens.Analysis showed that the change of internal stresses is iust the root cause of the change of transformation temperature.The relationships between the transformation behaviors and the heat treatment were discussed in the present report.

  9. Synthetic Ni3S2/Ni hybrid architectures as potential contrast agents in MRI

    Science.gov (United States)

    Ma, J.; Chen, K.

    2016-04-01

    Traditional magnetic resonance imaging (MRI) contrast agents mainly include superparamagnetic (SPM) iron oxide nanoparticle as T 2 contrast agent for liver and paramagnetic Gd (III)-chelate as T 1 contrast agent for all organs. In this work, weak ferromagnetic kale-like and SPM cabbage-like Ni3S2@Ni hybrid architectures were synthesized and evaluated as potential T 1 MRI contrast agents. Their relatively small r 2/r 1 ratios of 2.59 and 2.38, and high r 1 values of 11.27 and 4.89 mmol‑1 L s‑1 (for the kale-like and cabbage-like Ni3S2@Ni, respectively) will shed some light on the development of new-type MRI contrast agents.

  10. Microstructure and magnetic properties of Ti/Ni/Ti in dependence on Ni layer thickness

    Institute of Scientific and Technical Information of China (English)

    ZHANG Hanwei; FENG Shunzhen; ZHANG Yujie; SUN Huiyuan

    2006-01-01

    The films of Ti(15 nm)/Ni(t nm)/Ti(15 nm)(t=20, 30, 40, 50) were prepared by dc magnetron sputtering at room temperature and subsequent annealing at 400 ℃ for 30 min. Scanning probe microscope (SPM), vibrating sample magnetometer (VSM) and X-ray diffraction (XRD) were applied to study the magnetic properties and microstructure. AFM images show that small and uniform grains and some clusters appear with the increase of Ni thickness, also MFM images show that the size of domain first decreases and then increases. The coercivity reaches the maximum 48 kA·m-1 at t=30 nm. The XRD profiles show stronger fcc (111) orientation peak of Ni and weak hcp structure peaks of Ni3Ti. This results reveal that the crystal lines have the prefer orientation and achieve the ordered.

  11. Effects of reversible shape memory and aging in the Ni-50.5 at. % Ni alloy

    International Nuclear Information System (INIS)

    By the method of dilatometry and transmission electron microscopy the effects of reversible shape memory (ERSM) and structural changes in alloy Ti-50.5 at. % Ni after rolling in austenitic state and various thermal treatments were studied. it is ascertained that the alloy in non-deformed state is an aging one the process of Ti3Ni4 particles isolation takes place during long-term holding at temperatures approximately 150 deg C lower than in alloy Ti-51 at. % Ni. Deformation accelerates the process of particle isolation by two orders. It is shown that the deformation value during ERSM correlates with Ti3Ni4 particles dissolution-isolation, if alloy has not been recrystallized. Memory of reversible shape memory effect (double memory) was revealed, stemming from regular isolation of particles in deformed B2-phase and texture retaining in their arrangement

  12. Evolution of collectivity in the 78Ni region: Coulomb excitation of 74Ni at intermediate energies.

    Directory of Open Access Journals (Sweden)

    Marchi T.

    2014-03-01

    Full Text Available The study of the collective properties of nuclear excitations far from stability provides information about the shell structure at extreme conditions. Spectroscopic observables such as the energy or the transition probabilities of the lowest states, in nuclei with large neutron excess, allow to probe the density and isospin dependence of the effective interaction. Indeed, it was recently shown that tensor and three-body forces play an important role in breaking and creating magic numbers. Emblematic is the case of the evolution of the Ni isotopic chain where several features showed up moving from the most neutron rich stable isotope (64Ni towards the 78Ni nucleus where the large neutron excess coincides with a double shell closure. In this framework, we have recently performed an experiment with the goal to extract the B(E2; 0+ → 2+ value for the 74Ni nucleus in an intermediate-energy Coulomb excitation experiment: preliminary results are discussed.

  13. Magnetic transitions in Ni1-xMox and Ni1-xWx disordered alloys

    International Nuclear Information System (INIS)

    We present a mean-field study of the magnetic phase diagram of Ni1-xMox and Ni1-xWx alloys. The pair energies that enter the internal energy part of the free energy are obtained from a first-principles calculation. We try to understand why spin-glass phase is not observed in these alloys. - Highlights: → We have used the augmented space technique to study the electronic structure of NiMo and NiW. → Using the Lichtenstein formula we have obtained the exchange interactions in the alloys. → We have studied the mean-field magnetic phase diagram for the alloys. → The idea was to investigate why no spin-glass phase is not found in these alloys.

  14. Mechanical properties of NiO/Ni-YSZ composites depending on temperature, porosity and redox cycling

    DEFF Research Database (Denmark)

    Pihlatie, Mikko; Kaiser, Andreas; Mogensen, Mogens Bjerg

    2009-01-01

    with the Neel temperature, 250 degrees C, of NiO was observed. Above this temperature, a linear decrease occurred. Specific damping showed a peak at 170-180 degrees C and increased above ca. 1000 degrees C in NiO-YSZ. In the reduced state the elastic modulus decreased linearly with temperature......The Impulse Excitation Technique (IET) was used to determine the elastic modulus and specific damping of different Ni/NiO-YSZ composites suitable for use in solid oxide fuel cells (SOFC). The porosity of the as-sintered samples varied from 9 to 38% and that of the reduced ones from 31 to 52%. For...... all samples a linear relation between Young's modulus and porosity was found. The temperature dependency of the mechanical properties of both as-sintered and reduced composites was investigated by IET up to 1200 degrees C. In the as-sintered state, first an increase and peak of stiffness coinciding...

  15. Desmontando a ni-ni. Un estereotipo juvenil en tiempos de crisis

    OpenAIRE

    Navarrete Moreno, Lorenzo; Caro Sagüés, Gonzalo; Carreras, Enrique; de Francisco, Rafael; Gastón Faci, Diego; Roldán, Adela; Gutierrez Villalta, Jesús; Zúñiga Contreras, Ricardo

    2011-01-01

    El objetivo de este estudio es conocer la realidad social de los/las jóvenes españoles en situaciones vitales de inactividad laboral y formativa, tanto en sus parámetros demográficos como en relación a la actividad, la educación (en distintos niveles), otros tipos de formación, y su situación económica y familiar, (población del colectivo de jóvenes españoles que ni estudian ni trabajan), desde una visión informada y pormenorizada sociológicamente de dicho asunto. Este colectivo ni-ni se ...

  16. Ni based silicides for 45 nm CMOS and beyond

    Energy Technology Data Exchange (ETDEWEB)

    Lauwers, Anne [IMEC, Kapeldreef 75, 3001 Leuven (Belgium)]. E-mail: lauwersa@imec.be; Kittl, Jorge A. [IMEC, Texas Instruments (Belgium); Van Dal, Mark J.H. [IMEC, Philips Research Leuven (Belgium); Chamirian, Oxana [IMEC, Kapeldreef 75, 3001 Leuven (Belgium); Pawlak, Malgorzata A. [IMEC, Kapeldreef 75, 3001 Leuven (Belgium); Potter, Muriel de [IMEC, Kapeldreef 75, 3001 Leuven (Belgium); Lindsay, Richard [IMEC, Kapeldreef 75, 3001 Leuven (Belgium); Raymakers, Toon [Philips Research Laboratories, Prof. Holstlaan 4, 5656 AA Eindhoven (Netherlands); Pages, Xavier [IMEC, ASM Belgium (Belgium); Mebarki, Bencherki [Applied Materials (Belgium); Mandrekar, Tushar [Applied Materials Inc., Santa Clara, CA (United States); Maex, Karen [IMEC, Kapeldreef 75, 3001 Leuven (Belgium)

    2004-12-15

    Material issues that impact the applicability of Ni based silicides to CMOS flows were studied, including the excessive silicidation of narrow features, the growth kinetics of Ni{sub 2}Si and NiSi on single-crystalline and poly-crystalline silicon and the thermal degradation mechanisms. Ni{sub 2}Si was found to grow by diffusion controlled kinetics with an activation energy of about 1.55 eV on single-crystalline Si. As a result, the excessive silicidation in small features can be reduced in a 2-step Ni-silicide process by reducing the thermal budget of the first RTP step. The mechanisms of thermal degradation of NiSi were studied. Thin NiSi films were found to degrade morphologically while still in the monosilicide phase. Thick NiSi films degrade morphologically at low temperatures and by transformation to NiSi{sub 2} at high temperatures. The reaction of Ni with SiGe substrates and the effect of Ge on the thermal degradation of the Ni-germanosilicide were investigated. Activation energies for the thermal degradation of Ni(SiGe) on SiGe were found to be significantly smaller than the values found for the thermal degradation of NiSi on pure Si. The effect of alloying Ni with Pt or Ta was studied. NiSi films alloyed with Pt or Ta are found to be thermally more stable compared to pure NiSi. Alloying with Pt was found to improve the thermal stability of NiSi on narrow poly-Si gates. The kinetics of Ni{sub 2}Si and NiSi formation on poly silicon were determined as well as their dependence on dopants. The presence of B in high doses was found to slow down the silicide formation significantly. Dopant segregation to the NiSi/oxide interface was observed, which is believed to be responsible for the observed shifts in work function. The sheet resistance of fully Ni-silicided 100 nm poly Si/oxide stacks is found to be stable up to 800 deg. C.

  17. Ni based silicides for 45 nm CMOS and beyond

    International Nuclear Information System (INIS)

    Material issues that impact the applicability of Ni based silicides to CMOS flows were studied, including the excessive silicidation of narrow features, the growth kinetics of Ni2Si and NiSi on single-crystalline and poly-crystalline silicon and the thermal degradation mechanisms. Ni2Si was found to grow by diffusion controlled kinetics with an activation energy of about 1.55 eV on single-crystalline Si. As a result, the excessive silicidation in small features can be reduced in a 2-step Ni-silicide process by reducing the thermal budget of the first RTP step. The mechanisms of thermal degradation of NiSi were studied. Thin NiSi films were found to degrade morphologically while still in the monosilicide phase. Thick NiSi films degrade morphologically at low temperatures and by transformation to NiSi2 at high temperatures. The reaction of Ni with SiGe substrates and the effect of Ge on the thermal degradation of the Ni-germanosilicide were investigated. Activation energies for the thermal degradation of Ni(SiGe) on SiGe were found to be significantly smaller than the values found for the thermal degradation of NiSi on pure Si. The effect of alloying Ni with Pt or Ta was studied. NiSi films alloyed with Pt or Ta are found to be thermally more stable compared to pure NiSi. Alloying with Pt was found to improve the thermal stability of NiSi on narrow poly-Si gates. The kinetics of Ni2Si and NiSi formation on poly silicon were determined as well as their dependence on dopants. The presence of B in high doses was found to slow down the silicide formation significantly. Dopant segregation to the NiSi/oxide interface was observed, which is believed to be responsible for the observed shifts in work function. The sheet resistance of fully Ni-silicided 100 nm poly Si/oxide stacks is found to be stable up to 800 deg. C

  18. Magnetic Irreversibility in VO2/Ni Bilayers

    Science.gov (United States)

    de La Venta, Jose; Lauzier, Josh; Sutton, Logan

    The temperature dependence of the coercivity and magnetization of VO2/Ni bilayers was studied. VO2 exhibits a well-known Structural Phase Transition (SPT) at 330-340 K, from a low temperature monoclinic (M) to a high temperature rutile (R) structure. The SPT of VO2 induces an inverse magnetoelastic effect that strongly modifies the coercivity and magnetization of the Ni films. In addition, the growth conditions allow tuning of the magnetic properties. Ni films deposited on top of VO2 (M) show an irreversible change in the coercivity after the first cycle through the high temperature phase, with a corresponding change in the surface morphology of VO2. On the other hand, the Ni films grown on top of VO2 (R) do not show this irreversibility. These results indicate that properties of magnetic films are strongly affected by the strain induced by materials that undergo SPT and that it is possible to control the magnetic properties by tuning the growth conditions.

  19. Interface stress in Au/Ni multilayers

    DEFF Research Database (Denmark)

    Schweitz, K.O.; Böttiger, J.; Chevallier, J.; Feidenhans'l, Robert Krarup; Nielsen, Martin Meedom; Rasmussen, Frank Berg

    2000-01-01

    The effect of intermixing on the apparent interface stress is studied in < 111 >-textured dc-magnetron sputtered Au/Ni multilayers by use of two methods commonly used for determining interface stress. The method using profilometry and in-plane x-ray diffraction does not take intermixing into...

  20. Dolor en niños.

    Directory of Open Access Journals (Sweden)

    María Ana Tovar

    2009-11-01

    Full Text Available La definición hecha por la Asociación Internacional para el Estudio del Dolor-IASP se debe ampliar cuando se considera el dolor en los niños, para incluir indicadores de conducta y fisiológicos, porque muchos no pueden verbalizar su dolor. Se ha demostrado que las estructuras anatómicas necesarias para la percepción del dolor son funcionales en el segundo trimestre del embarazo, pero hay diferencias en la transmisión y modulación del dolor cuando se comparan con los adultos. El aprendizaje acerca del dolor ocurre con la primera experiencia dolorosa. En la percepción del dolor del niño influyen factores biológicos, cognoscitivos, psicológicos y socioculturales. La evaluación del dolor en los niños se hace a través de técnicas de auto-informe, de observación en el comportamiento y de medidas fisiológicas. Finalmente, cuando se considere el manejo del dolor es necesario eliminar los mitos alrededor del uso de analgésicos opioides en los niños.

  1. Dolor en niños

    Directory of Open Access Journals (Sweden)

    María Ana Tovar

    2005-12-01

    Full Text Available La definición hecha por la Asociación Internacional para el Estudio del Dolor-IASP se debe ampliar cuando se considera el dolor en los niños, para incluir indicadores de conducta y fisiológicos, porque muchos no pueden verbalizar su dolor. Se ha demostrado que las estructuras anatómicas necesarias para la percepción del dolor son funcionales en el segundo trimestre del embarazo, pero hay diferencias en la transmisión y modulación del dolor cuando se comparan con los adultos. El aprendizaje acerca del dolor ocurre con la primera experiencia dolorosa. En la percepción del dolor del niño influyen factores biológicos, cognoscitivos, psicológicos y socioculturales. La evaluación del dolor en los niños se hace a través de técnicas de auto-informe, de observación en el comportamiento y de medidas fisiológicas. Finalmente, cuando se considere el manejo del dolor es necesario eliminar los mitos alrededor del uso de analgésicos opioides en los niños.

  2. Annealing Ni nanocrystalline on WC-Co

    International Nuclear Information System (INIS)

    The effects of annealing temperature on nanocrystalline sputter-deposited Ni thin films (500 nm) deposited on WC-Co (4 wt.%) were investigated. Special attention was focused on quantitative evaluation of residual stress and Ni diffusion into the WC-Co, after heat treatment, from 873 to 1273 K. The estimated level of residual stress, as measured by X-ray diffraction, is around -1.3 ± 0.1 GPa for the as-deposited film, whereas after annealing at 1273 K it decreases significantly. Atomic force microscopy shows that high annealing temperature results into an exponential increase of the roughness. An intermixing between the nanocrystalline Ni and the Co from WC substrate occurs, as it is revealed by quantitative depth-resolved Rutherford backscattering spectrometry analysis and also supported by X-ray photoelectron spectroscopy. We ascribe a significant stress relief with the increasing annealing temperature to the diffusion process. The understanding of this process is particularly important in WC-Co parts with the surface treated with Ni in order to improve the maximum surface service temperature.

  3. Annealing Ni nanocrystalline on WC-Co

    Energy Technology Data Exchange (ETDEWEB)

    Fernandes, C.M.; Guisbiers, G.; Pereira, S. [CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Barradas, N.P.; Alves, E. [Nuclear and Technological Institute, E.N. 10, 2686-953 Sacavem (Portugal); Senos, A.M.R., E-mail: anamor@ua.p [CICECO, University of Aveiro, 3810-193 Aveiro (Portugal); Vieira, M.T. [Mechanical Engineering Department, ICEMS, Polo II, 3030-201 Coimbra (Portugal)

    2009-08-12

    The effects of annealing temperature on nanocrystalline sputter-deposited Ni thin films (500 nm) deposited on WC-Co (4 wt.%) were investigated. Special attention was focused on quantitative evaluation of residual stress and Ni diffusion into the WC-Co, after heat treatment, from 873 to 1273 K. The estimated level of residual stress, as measured by X-ray diffraction, is around -1.3 +- 0.1 GPa for the as-deposited film, whereas after annealing at 1273 K it decreases significantly. Atomic force microscopy shows that high annealing temperature results into an exponential increase of the roughness. An intermixing between the nanocrystalline Ni and the Co from WC substrate occurs, as it is revealed by quantitative depth-resolved Rutherford backscattering spectrometry analysis and also supported by X-ray photoelectron spectroscopy. We ascribe a significant stress relief with the increasing annealing temperature to the diffusion process. The understanding of this process is particularly important in WC-Co parts with the surface treated with Ni in order to improve the maximum surface service temperature.

  4. Electroplating condition for Ni nanocrystalline on metal (Ni and Cu) plates

    Energy Technology Data Exchange (ETDEWEB)

    Park, Keun Yung; Uhm, Young Rang; Son, Kwang Jae; Shim, Young Ho; Choi, Sun Ju [KAERI, Daejeon (Korea, Republic of)

    2012-10-15

    Ni 63, a beta radiation source, is prepared by the electrical deposition of radioactive Ni 63 ions on a thin non radioactive nickel foil or Cu plate. Given a half life of 100 years, a nuclear battery will still produce half of its initial starting power after 100 years. A speck of a radioisotope like nickel 63, for example, contains enough energy to power a nano nuclear battery for decades, and to do so safely. Ni 63 plating is similar to other electroplating processes that employ soluble metal anodes. It requires the passage of a direct current between two electrodes that are immersed in a conductive, aqueous solution of nickel salts. The charged Ni ions are formed by sulfate, sulfamate, chloride, and a Watts bath. However, the charged Ni 63 ions are formed by dissolving metal Ni 63. To established the coating condition of Ni 63, non radioactive metal Ni particles are dissolved an acid solution and electroplated on a Ni sheet. The nickel plating process is used extensively for decorative, engineering and electro forming purposes because the appearance and other properties of electrodeposited nickel can be varied over a wide range by controlling the composition and operating parameters of the plating solution. A continuous increase in the grain size versus current density has also been recognized in the direct current electrodeposition of nickel coating. On the other hand, A runa et al. reported that the current density has no significant effect on the grain size of nickel electro deposits. A review of the literature shows that saccharin has often been added to a nickel plating bath since the 1980s to improve the ductility and brightness, and in later periods as a grain refiner agent. In the present paper, not only the preparation of a Ni plating solution prepared by dissolving metal particles, but also an optimization of the deposition conditions, such as the current density, saccharin concentration in the bath, and different metal substrates were investigated

  5. Lamellar-crossing-structured Ni(OH)2/CNTs/Ni(OH)2 nanocomposite for electrochemical supercapacitor materials

    International Nuclear Information System (INIS)

    Ni(OH)2/CNTs/Ni(OH)2 lamellar-crossing-nanostructure with a single lamellar spacing of ∼5 nm was effectively constructed through two-phase-interface reaction process followed by the CNTs crossed among the lamellar-nanostructured Ni(OH)2. The resultant nanocomposite can offer large active surface areas and short diffusion paths for electrons and ions, and is investigated as a potential pseudocapacitor electrode material for electrochemical energy storage applications. Electrochemical data demonstrate that the as-prepared nanocomposite exhibits a high specific capacitance of ∼1600 F g−1 at the scan rate of 1 mV s−1 in 6 M KOH solution at normal pressure and temperature, which is great higher than Ni(OH)2 (∼1200 F g−1). Furthermore, Ni(OH)2/CNTs/Ni(OH)2 nanocomposite shows a higher energy density (∼125 Wh kg−1, 2 A g−1) and has a slightly decrease of 5% in specific capacitance after 1000 continuous charge/discharge cycles. - Graphical abstract: As-constructed Ni(OH)2/CNTs/Ni(OH)2 lamellar-crossing-nanostructure exhibits remarkable enhancement in electrochemical stability and high specific capacity of ∼1600 F g−1 at a scan rate of 1 mV s−1, suggesting promising potential for supercapacitor applications. - Highlights: • New designed lamellar-crossing-structured Ni(OH)2/CNTs/Ni(OH)2 nanocomposites have been firstly reported in this work. • Ni(OH)2/CNTs/Ni(OH)2 lamellar-crossing-nanostructures show firm nanostructure and excellent electrochemical stability. • Ni(OH)2/CNTs/Ni(OH)2 nanocomposites exhibit excellent specific capacitance. • Ni(OH)2/CNTs/Ni(OH)2 nanocomposites have the potential application in electrochemical energy storage applications

  6. In-Situ Transmission Electron Microscopy Study of Surface Oxidation for Ni-10Cr and Ni-20Cr Alloys

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Langli; Zou, Lianfeng; Schreiber, Daniel K.; Baer, Donald R.; Bruemmer, Stephen M.; Zhou, Guangwen; Wang, Chong M.

    2016-03-15

    The early-stage oxidation of Ni (001) thin films alloyed with 10 or 20 at% Cr at 700 °C has been directly visualized using environmental transmission electron microscopy. Independent of Cr concentration, the oxidation initiates via the nucleation of surface NiO islands and subsurface Cr2O3. The NiO grows and transitions into a continuous film, followed by the nucleation and growth of NiCr2O4 islands through the outer oxide. The Cr concentration plays a more critical role in the later stages of the oxidation. A continuous and more protective Cr2O3 sublayer is established for Ni-20at% Cr, while the Cr2O3 sublayer for Ni-10at%Cr is discontinuous for Ni-10at%Cr. Oxidation persists on the lower Cr alloy where NiO whiskers are observed to preferentially nucleate and grow from the NiCr2O4 islands. It is suggested that short-circuit diffusion of Ni occurs along the NiCr2O4 interfaces through the discontinuous Cr2O3 layer in Ni-10at%Cr to facilitate the selective nucleation of NiO whiskers on the NiCr2O4 surfaces. Conversely, the protective nature of the continuous Cr2O3 film in Ni-20at%Cr blocks this short-circuit pathway and prevents the formation of additional NiO on the surface in the early stage oxidation.

  7. Relaxation, Emission Modes and Limit Temperatures in Ni+Ni HIC

    OpenAIRE

    Barrañón, Armando; J. A. López; Dorso, C.

    2004-01-01

    A dynamical stability analysis is performed for Ni+Ni central collision at intermediate energies, showing that in chemical, thermal and dynamical equilibriums are reached at an early stage of system evolution. This is obtained by computing the relaxation times of the quadrupole momentum, speed of sound and electric charge density of the system. This way, fragment emission modes at low and high energies as well as the qualitative behavior of the limit temperatures are determined.

  8. Thermal Model Analysis of Particle Ratios at GSI Ni-Ni Experiments Using Exact Strangeness Conservation

    CERN Document Server

    Cleymans, J; Keränen, A; Suhonen, E

    1998-01-01

    The production of hadrons in Ni-Ni at the GSI is considered in a hadronic gas model with chemical equilibrium. Special attention is given to the abundance of strange particles which are treated using the exact conservation of strangeness. It is found that all the data can be described using a temperature T = 70 pm 10 MeV and a baryon chemical potential mu_B = 720 pm 20 MeV.

  9. Ni-Al2O3 and Ni-Al composite high-aspect-ratio microstructures

    Science.gov (United States)

    Wang, Tao; Sorrell, Melford; Kelly, Kevin W.; Ma, Evan

    1998-09-01

    High-aspect-ratio microstructures (HARMs) have a variety of potential applications in heat transfer, fluid mechanics, catalysts and other microelectromechanical systems (MEMS). The aim of this work is to demonstrate the feasibility to fabricate high performance particulate metal-matrix composite and intermetallic micromechanical structures using the LIGA process. Well-defined functionally graded Ni-Al2O3 and Ni-Al high-aspect-ratio microposts were electroformed into lithographically patterned PMMA holes from a nickel sulfamate bath containing submicron alumina and a diluted Watts bath containing microsized aluminum particles, respectively. SEM image analysis showed that the volume fraction of the alumina reached up to around 30% in the Ni-Al2O3 deposit. The Vickers microhardness of these composites is in the range of 418 through 545, which is higher than those of nickel microstructures from a similar particle-free bath and other Ni-based electrodeposits. In the work on Ni-Al electroplating, a newly developed diluted Watts bath was used to codeposit micron-sized aluminum particles. The intermetallic compound Ni3Al was formed by the reaction of nickel matrices and aluminum particles through subsequent annealing at 630 degrees Celsius. WDS and XRD analyses confirmed that the annealed coating is a two-phase (Ni-Ni3Al) composite. The maximum aluminum volume fraction reached 19% at a cathode current density of 12 mA cm-2, and the Vickers microhardness of the as-deposited coatings is in the range 392 - 515 depending on the amount of aluminum incorporated.

  10. Characteristics of Reactive Ni3Sn4 Formation and Growth in Ni-Sn Interlayer Systems

    Science.gov (United States)

    Lis, Adrian; Kenel, Christoph; Leinenbach, Christian

    2016-03-01

    The near-isothermal growth and formation of Ni3Sn4 intermetallic compounds (IMC) in Ni-Sn interlayer systems was studied in the solid state at 473 K (200 °C) and under solid-liquid conditions at 523 and 573 K (250 °C and 300 °C) from an initial state of a few seconds. Scalloped solid-state IMC formation was mainly driven by grain boundary diffusion of Ni through the IMC layer combined with the grain coarsening of the IMC layer. Under solid-liquid conditions, the formation of faceted and needle-shaped Ni3Sn4 grains as well as an atypical IMC growth behavior with similar parabolic growth constants for 523 K and 573 K (250 °C and 300 °C) was observed within the first 180 seconds of the holding time, and IMC growth occurred as an isothermal solidification from the Ni-saturated Sn melt. Due to the progressive densification of the IMC layer and the diffusion-controlled growth, the kinetics slowed down by approximately one order of magnitude after 180 seconds of annealing. The final stage was characterized by the formation of IMC islands ahead of the interfacial Ni3Sn4 layer. Needle-like IMC growth was effectively suppressed under combined solid-state and solid-liquid conditions. Textured Ni3Sn4 IMC formation at the Ni-Sn interface was approved with pole figure measurements. The activation energy Q for solid-liquid IMC formation was calculated as 43.3 kJ/mol, and processing maps for IMC growth and Sn consumption were derived as functions of temperature and time, respectively.

  11. Film Thickness Influences on the Thermoelectric Properties of NiCr/NiSi Thin Film Thermocouples

    Science.gov (United States)

    Chen, Y. Z.; Jiang, H. C.; Zhang, W. L.; Liu, X. Z.; Jiang, S. W.

    2013-06-01

    NiCr/NiSi thin film thermocouples (TFTCs) with a multi-layer structure were fabricated on Ni-based superalloy substrates (95 mm × 35 mm × 2 mm) by magnetron sputtering and electron beam evaporation. The five-layer structure is composed of NiCrAlY buffer layer (2 μm), thermally grown Al2O3 bond layer (200 nm), Al2O3 insulating layer (10 μm), NiCr/NiSi TFTCs (1 μm), and Al2O3 protective layer (500 nm). Influences of thermocouple layer thickness on thermoelectric properties were investigated. Seebeck coefficient of the samples with the increase in thermocouple layer thickness from 0.5 μm to 1 μm increased from 27.8 μV/°C to 33.8 μV/°C, but exhibited almost no change with further increase in thermocouple layer thickness from 1 μm to 2 μm. Dependence on temperature of the thermal electromotive force of the samples almost followed standard thermocouple characteristic curves when the thickness of the thermocouple layer was 1 μm and 2 μm. Sensitive coefficient K of the samples increased greatly with the increase in thickness of the thermocouple layer from 0.5 μm to 1 μm, but decreased insignificantly with the increase in thermocouple layer thickness from 1 μm to 2 μm, and continuously decreased with the increase in temperature. The sensitive coefficient and the stability of NiCr/NiSi TFTCs were both improved after annealing at 600°C.

  12. Effect of deposition technique of Ni on the perpendicular magnetic anisotropy in Co/Ni multilayers

    Energy Technology Data Exchange (ETDEWEB)

    Akbulut, S., E-mail: sakbulut@gtu.edu.tr [Gebze Technical University, Physics Department, Istanbul Cad, PK 41400 Gebze/Kocaeli (Turkey); Akbulut, A. [Gebze Technical University, Physics Department, Istanbul Cad, PK 41400 Gebze/Kocaeli (Turkey); Özdemir, M. [Marmara University, Physics Department, Göztepe, Istanbul (Turkey); Yildiz, F., E-mail: fyildiz@gtu.edu.tr [Gebze Technical University, Physics Department, Istanbul Cad, PK 41400 Gebze/Kocaeli (Turkey)

    2015-09-15

    The perpendicular magnetic anisotropy (PMA) of Si/Pt 3.5/(Co 0.3/Ni 0.6){sub n} /Co 0.3/ Pt 3 (all thicknesses are nm) multilayers were investigated for two different sample sets by using ferromagnetic resonance (FMR) and magnetooptic Kerr effect (MOKE) techniques. In the first sample set all layers (buffer, cap, Co and Ni) were grown by magnetron sputtering technique while in the second sample set Ni sub-layers were grown by molecular beam epitaxy (MBE) at high vacuum. Apart from deposition technique of Ni, all other parameters like thicknesses and growth rates of each layers are same for both sample sets. Multilayers in these two sample sets display PMA in the as grown state until a certain value of bilayer repetition (n) and the strength of PMA decreases with increasing n. Magnetic easy axis's of the multilayered samples switched from film normal to the film plane when n is 9 and 5 for the first and second sample sets, respectively. The reason for that, PMA was decreased due to increasing roughness with increasing n. This was confirmed by X Ray Reflectivity (XRR) measurements for both sample sets. Moreover, in the first sample set coercive field values are smaller than the second sample set, which means magnetic anisotropy is lower than the latter one. This stronger PMA is arising due to existence of stronger Pt (111) and Co/Ni (111) textures in the second sample set. - Highlights: • Effect of deposition techniques for Ni sub-layers on magnetic properties in [Co/Ni]{sub n} multilayered films was studied. • Ni sub-layers were deposited by two different techniques, molecular beam epitaxy (MBE) and magnetron sputtering. • Spin reorientation thickness and magnitude of the anisotropy are strongly depending on growing techniques.

  13. Characteristics of Reactive Ni3Sn4 Formation and Growth in Ni-Sn Interlayer Systems

    Science.gov (United States)

    Lis, Adrian; Kenel, Christoph; Leinenbach, Christian

    2016-06-01

    The near-isothermal growth and formation of Ni3Sn4 intermetallic compounds (IMC) in Ni-Sn interlayer systems was studied in the solid state at 473 K (200 °C) and under solid-liquid conditions at 523 and 573 K (250 °C and 300 °C) from an initial state of a few seconds. Scalloped solid-state IMC formation was mainly driven by grain boundary diffusion of Ni through the IMC layer combined with the grain coarsening of the IMC layer. Under solid-liquid conditions, the formation of faceted and needle-shaped Ni3Sn4 grains as well as an atypical IMC growth behavior with similar parabolic growth constants for 523 K and 573 K (250 °C and 300 °C) was observed within the first 180 seconds of the holding time, and IMC growth occurred as an isothermal solidification from the Ni-saturated Sn melt. Due to the progressive densification of the IMC layer and the diffusion-controlled growth, the kinetics slowed down by approximately one order of magnitude after 180 seconds of annealing. The final stage was characterized by the formation of IMC islands ahead of the interfacial Ni3Sn4 layer. Needle-like IMC growth was effectively suppressed under combined solid-state and solid-liquid conditions. Textured Ni3Sn4 IMC formation at the Ni-Sn interface was approved with pole figure measurements. The activation energy Q for solid-liquid IMC formation was calculated as 43.3 kJ/mol, and processing maps for IMC growth and Sn consumption were derived as functions of temperature and time, respectively.

  14. New precipitate phase in Pd and Ni rich Ti-Pd-Ni shape memory alloys

    International Nuclear Information System (INIS)

    The decomposition behavior and morphology of new precipitate in Pd and Ni rich Ti-Pd-Ni high temperature shape memory alloys have been studied by differential scanning calorimeter (DSC) and transmission electron microscopy (TEM). The precipitate is formed in Ti48Pd52-xNix alloys with X = 11 to 36 at%Ni. The precipitate appears with exothermic peak about 650 to 700 K and resolves with endothermic peak with about 740 to 780 K in DSC heating curve for the quenched alloys. The both peak temperatures increase with increasing Ni concentration. The shape of precipitate changes from cuboid to oval sphere shapes with increasing Ni concentration. The electron diffraction patterns of the precipitate are characterized by 1/4{111} superlattice reflections in B2 reciprocal space. The Ti48Pd31Ni21 alloy aged under constrained condition at 673 K for 36 ks shows reversible shape memory effect during thermal cycling between room temperature and 523 K. (orig.)

  15. Phase transformation and deformation behavior of NiTi-Nb eutectic joined NiTi wires.

    Science.gov (United States)

    Wang, Liqiang; Wang, Cong; Zhang, Lai-Chang; Chen, Liangyu; Lu, Weijie; Zhang, Di

    2016-01-01

    NiTi wires were brazed together via eutectic reaction between NiTi and Nb powder deposited at the wire contact region. Phase transformation and deformation behavior of the NiTi-Nb eutectic microstructure were investigated using transmission electron microscopy (TEM) and cyclic loading-unloading tests. Results show that R phase and B19' martensite transformation are induced by plastic deformation. R phase transformation, which significantly contributes to superelasticity, preferentially occurs at the interfaces between NiTi and eutectic region. Round-shaped Nb-rich phase with rod-like and lamellar-type eutectics are observed in eutectic regions. These phases appear to affect the deformation behavior of the brazed NiTi-Nb region via five distinct stages in stress-strain curves: (I) R phase reorientation, (II) R phase transformation from parent phase, (III) elastic deformation of reoriented martensite accompanied by the plastic deformation of Nb-rich phase and lamellar NiTi-Nb eutectic, (IV) B19' martensitic transformation, and (V) plastic deformation of the specimen. PMID:27049025

  16. Studies on the Sliding Wear Performance of Plasma Spray Ni-20Cr and Ni3Al Coatings

    Science.gov (United States)

    Kaur, Maninder; Singh, Harpreet; Singh, Balraj; Singh, Bhupinder

    2010-01-01

    Two metallic powders namely Ni-20Cr and Ni3Al were coated on AISI 309 SS steel by shrouded plasma spray process. The wear behavior of the bare, Ni-20Cr and Ni3Al-coated AISI 309 SS steel was investigated according to ASTM Standard G99-03 on a Pin-on-Disc Wear Test Rig. The wear tests were carried out at normal loads of 30 and 50 N with a sliding velocity of 1 m/s. Cumulative wear rate and coefficient of friction (μ) were calculated for all the cases. The worn-out surfaces were then examined by scanning electron microscopy analysis. Both the as-sprayed coatings exhibited typical splat morphology. The XRD analysis indicated the formation of Ni phase for the Ni-20Cr coating and Ni3Al phase for the Ni3Al coating. It has been concluded that the plasma-sprayed Ni-20Cr and Ni3Al coatings can be useful to reduce the wear rate of AISI 309 SS steel. The coatings were found to be adherent to the substrate steel during the wear tests. The plasma-sprayed Ni3Al coating has been recommended as a better choice to reduce the wear of AISI 309 SS steel, in comparison with the Ni-20Cr coating.

  17. Study of the magnetic microstructure of Ni/NiO nanogranular samples above the electric percolation threshold by magnetoresistance measurements

    International Nuclear Information System (INIS)

    Magnetoresistance measurements have been exploited to gain information on the magnetic microstructure of two Ni/NiO nanogranular materials consisting of Ni nanocrystallites (mean size of the order of 10 nm) embedded in a NiO matrix and differing in the amount of metallic Ni, ∼33 and ∼61 vol%. The overall conductance of both samples is metallic in character, indicating that the Ni content is above the percolation threshold for electric conductivity; the electric resistivity is two orders of magnitude smaller in the sample with higher Ni fraction (10-5 Ωm against 10-3 Ωm). An isotropic, spin-dependent magnetoresistance has been measured in the sample with lower Ni content, whereas both isotropic and anisotropic magnetoresistance phenomena coexist in the other material. This study, associated with magnetization loop measurements and the comparison with the exchange bias effect, allows one to conclude that in the sample with lower Ni content neither the physical percolation of the Ni nanocrystallites nor the magnetic percolation (i.e., formation of a homogeneous ferromagnetic network) are achieved; in the other sample physical percolation is reached while magnetic percolation is still absent. In both behaviors, a key role is played by the NiO matrix, which brings about a magnetic nanocrystallite/matrix interface exchange energy term and rules both the direct exchange interaction among Ni nanocrystallites and the magnetotransport properties of these nanogranular materials. (paper)

  18. Preparation and properties of 4. 25Cu-0.75Ni/NiFe2O4 cermet

    Institute of Scientific and Technical Information of China (English)

    LI Jie; ZHANG Gang; LAI Yan-qing; TIAN Zhong-liang; QIN Qing-wei

    2005-01-01

    4.25Cu-0.75Ni/NiFe2 O4 cermets were prepared by doping NiFe2 O4 ceramic matrix with the mixed powders of Cu and Ni or Cu-Ni alloy powder as the electrical conducting metallic elements. The effects of technological parameters, such as the adding modes of metallic elements, the ball milling time, the sintering time and the sintering temperature, on the relative density and resistivity of the cermets were studied. The results show that the resistivity of 4.25Cu-0.75Ni/NiFe2 O4 cermets decreases with increasing temperature, and has a turning point at 590 ℃, which is similar to that of NiFe2 O4 ceramic. The sintering temperature and adding modes of metallic elements have a great influence on the properties of 4. 25Cu-0. 75Ni/NiFe2O4 cermets. When the sintering temperature increases from 1 200 ℃ to 1 300 ℃, the relative density increases from 89.86% to 95.33 %0, and the resistivity at 960 ℃ decreases and Ni, the cermets of finely and uniformly dispersed metallic phase, high density and electric conductivity are obples sintered at 1 200 ℃ for 2 h, which are both better than those of the cermets prepared under the same technique conditions but with the metallic elements added as 85Cu-15Ni alloy powders.

  19. Controlled synthesis of Ni/CuOx/Ni nanowires by electrochemical deposition with self-compliance bipolar resistive switching

    Science.gov (United States)

    Park, Kyuhyun; Lee, Jang-Sik

    2016-01-01

    We demonstrate synthesis of Ni/CuOx/Ni nanowires (NWs) by electrochemical deposition on anodized aluminum oxide (AAO) membranes. AAO with pore diameter of ~70 nm and pore length of ~50 μm was used as the template for synthesis of NWs. After deposition of Au as the seed layer, NWs with a structure of Ni/CuOx/Ni were grown with a length of ~12 μm. The lengths of 1st Ni, CuOx, and 2nd Ni were ~4.5 μm, ~3 μm, and ~4.5 μm, respectively. The Ni/CuOx/Ni device exhibits bipolar resistive switching behavior with self-compliance characteristics. Due to the spatial restriction of the current path in NW the Ni/CuOx/Ni NW devices are thought to exhibit self-compliance behaviour. Ni/CuOx/Ni NWs showed bipolar resistive changes possibly due to conducting filaments that are induced by oxygen vacancies. The reliability of the devices was confirmed by data retention measurement. The NW-based resistive switching memory has applications in highly scalable memory devices and neuromorphic devices. PMID:26975330

  20. Controlled synthesis of Ni/CuOx/Ni nanowires by electrochemical deposition with self-compliance bipolar resistive switching

    Science.gov (United States)

    Park, Kyuhyun; Lee, Jang-Sik

    2016-03-01

    We demonstrate synthesis of Ni/CuOx/Ni nanowires (NWs) by electrochemical deposition on anodized aluminum oxide (AAO) membranes. AAO with pore diameter of ~70 nm and pore length of ~50 μm was used as the template for synthesis of NWs. After deposition of Au as the seed layer, NWs with a structure of Ni/CuOx/Ni were grown with a length of ~12 μm. The lengths of 1st Ni, CuOx, and 2nd Ni were ~4.5 μm, ~3 μm, and ~4.5 μm, respectively. The Ni/CuOx/Ni device exhibits bipolar resistive switching behavior with self-compliance characteristics. Due to the spatial restriction of the current path in NW the Ni/CuOx/Ni NW devices are thought to exhibit self-compliance behaviour. Ni/CuOx/Ni NWs showed bipolar resistive changes possibly due to conducting filaments that are induced by oxygen vacancies. The reliability of the devices was confirmed by data retention measurement. The NW-based resistive switching memory has applications in highly scalable memory devices and neuromorphic devices.