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Maruyama, T.,Cheoun, M.K.,Kajino, T.,Mathews, G.J. North-Holland Pub. Co 2016 Physics letters: B Vol.757 No.-
<P>We study pion production by proton synchrotron radiation in the presence of a strong magnetic field when the Landau numbers of the initial and final protons are n(i, f) similar to 10(4)-10(5). We find in our relativistic field theory calculations that the pion decay width depends only on the field strength parameter which previously was only conjectured based upon semi-classical arguments. Moreover, we also find new results that the decay width satisfies a robust scaling relation, and that the polar angular distribution of emitted pion momenta is very narrow and can be easily obtained. This scaling implies that one can infer the decay width in more realistic magnetic fields of 10(15) G, where n(i, f) similar to 10(12)-10(13), from the results for n(i, f) similar to 10(4)-10(5). The resultant pion intensity and angular distributions for realistic magnetic field strengths are presented and their physical implications discussed. (C) 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).</P>
Influence of Ripening Stages on the Quality of Whole Crop Silage and Grain Silage of Fodder Rice
Maruyama, S.,Yokoyama, I.,Asai, H.,Sakaguchi, S.,Ohtani, T.,Yokota, H.,Kita, K. Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.3
In high-income Asian countries like Korea and Japan, per capita rice consumption has declined because of the change in consumer' favorite foods from rice to high-cost quality foods. This has forced farmers to reduce rice production. Although fodder rice could be another option to be cultured by farmers, available information concerning rice grain silage has been limited. In the present study, therefore, the difference in the quality of fodder rice silage prepared from either whole crop or grain at different ripening stages was compared. Various supplements were also added into whole crop and grain silages of fodder rice before ensiling, and thereafter, the palatability of prepared silages was determined by beef cattle. At ear emergence stage, the pH values for both grain and whole crop silages were approximately 4.5. In both grain and whole crop silages, the pH values were significantly increased by progressing ripening stages from milk-ripe stage to yellow-ripe stages, and the increase in pH value for grain silage was faster than that for whole crop silage. In the grain silage, the higher lactic acid (LA) content in grain silage seemed to be, the lower pH value was. Both in grain and whole crop silages, pH was significantly decreased by supplementation with LA bacteria. There were no significant differences in feed intake among any treatment groups.
Maruyama, Toshio,Ueda, Mitsutoshi The Korean Ceramic Society 2010 한국세라믹학회지 Vol.47 No.1
When metal oxides are exposed to chemical potential gradients, ions are driven to diffusive mass transport. During this transport process, the divergence of ionic fluxes offers the formation/annihilation of oxides. Therefore, the divergence of ionic flux may play an important role in the void formation in oxides. Kinetic equations were derived for describing chemical potential distribution, ionic fluxes and their divergence in oxides. The divergence was found to be the measure of void formation. Defect chemistry in scales is directly related to the sign of divergence and gives an indication of the void formation behavior. The quantitative estimation on the void formation was successfully applied to a growing magnetite scale in high temperature oxidation of iron at 823 K.
Maruyama, Toshiro,Miura, Akio,Yoshida, Tamao,Suzuki, Yoshihiro 嶺南大學校 環境問題硏究所 1996 環境硏究 Vol.16 No.1
Four kinds or chlorinated soultions were investigated to identify the causative substance(s) inhibiting the growth of Porphyra yezoensis thalli. The inhibitory effects were measured in terms of the length and the number of dead cells in Porphyra yezoensis thalli. Tests were conducted by cultures dosed chlorinated municipal sewage effluent, chlorinated ammonium solution, chlorinated municipal sewage effluent after nitrification and chlorinated ion exchanged water, respectively, each culture being subjected to shaking. Chlorinated municipal sewage effluent and chlorinated ammonium solution showed rather severe inhibitory effects on the growth of Porphyra yezoensis thalli as compared to chlorinated municipal sewage effluent after nitrification and chlorinated ion exchanged water. EC_20(10-day) values (in initial chlorine concentration) for chlorinated municipal sewage effluent, chlorinated ammonium solution and chlorinated ion exchanged water were 0.016 mg Cl2/l, 0.014-0.020 mg Cl2/l and 1.4 mg Cl2/l, respectively. The chlorinated municipal sewage effluent after nitrification did not show any adverse effects on the growth of Porphyra yezoensis thalli. It was determined that only mono-chloramine formed in both chlorinated municipal sewage effluent and chlorinated ammonium solution, and that no chloramine is present in both chlorinated effluent after nitrification and chlorinated ion exchanged water. Therefore, monochloramine was considered to be a causative substance to the growth of Porphyra yezoensis thalli. Above mentioned results suggest that complete nitrification is suitable measures to reduce the adverse effects of chlorinated municipal sewage effluent on the growth of Porphyra yezoensis thalli.
Development of Helical Groove Bush for Construction Machines
Maruyama Kazuo,Mawatari Osamu,Tokushima Hidekazu,Yanase Takeshi,Maki Kunio 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
This study was conducted to improve the durability and decrease the friction of the sintered bushing used in the joints of construction equipment. Research was carried out to examine the effects of the groove pattern on the inner surface. The following results were obtained: (1) The bushing (EK Bush) with grooves on the inner diameter showed increased durability as compared to a non-grooved bushing. (2) The helical-grooved bushing showed the least amount of wear; it was 1/10 of the wear of the non-grooved bushing. (3) If the distance between grooves was decreased, then the coefficient of friction also decreased.