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Effect of Additive Elements on Electrochemical Behavior of Passive Films on Fe-18Cr Alloy
Fujimoto, S.,Umemura, H.,Kurihara, M.,Tsuchiya, H.,Shibata, T. 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.1
Electrochemical behaviour of Fe-18Cr-X (X: Al, Si, Ti, Mn, Ni, Cu, Zr, Nb, Mo, and W, 0.5-4 at.%) alloy thin films deposited on Si wafer by ion beam sputtering technique was examined in order to discuss the effect of alloying elements which are completely dissolved in the alloy. Polarisation curves measured in 0.1 krnol m" H2S04 revealed that active dissolution was suppressed by Ni, Nb, Mo, Cu and Ti, but was almost not affected by Al, Si, Mn. Pitting corrosion resistance in acid chloride solutions was extremely improved by Nb, Mo, Ti. On the other hand, Al, Si, Mn exhibited almost no change in pitting potential. Reactivation in sulphuric acid was suppressed by Mo, Nb, Ni, Ti, but not affected or slightly enhanced by Si and Mn. It is noticeable that addition of Nb is especially beneficial for preventing both pitting corrosion and reactivation. The corrosion behaviour of Fe-Cr alloys are discussed in terms of the stability of passive film which is influenced by minute additives incorporated in the film.
[가솔린엔진부문] BULK COMBUSTION을 위한 메탄올 및 가솔린 혼합연료의 분무특성에 관한 연구
최욱(W. Choi),임진강(J.K. Lim),최병철(B.C. Choi),임명택(M.T. Lim),김영길(Y.K.Kim),H. Fujimoto 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The main object of tins work is to investigate the spray behavior and spray charateristics of methanol and MX5 for tile bulk combustion. For this purpose, the effects of the ambient temperature and the injection pressure have been studied with the PIV system and CVCC for visualization. In tins experiment, the spray visualization of methanol and M85 was performed under various conditions such as ambient temperature, injection pressure.<br/> As a result, it is noticed that the increase of ambient temperature and injection pressure influenced tile formation of mixture. For the formation of homogeneous mixture, the improvement of fuel vaporization and tile formation of uniform temperature field were required.<br/>
6d Dirac fermion on a rectangle; scrutinizing boundary conditions, mode functions and spectrum
Fujimoto, Y.,Hasegawa, K.,Nishiwaki, K.,Sakamoto, M.,Tatsumi, K. North Holland 2017 Nuclear physics, B Vol.922 No.-
We classify possible boundary conditions of a 6d Dirac fermion Ψ on a rectangle under the requirement that the 4d Lorentz structure is maintained, and derive the profiles and spectrum of the zero modes and nonzero KK modes under the two specific boundary conditions, (i) 4d-chirality positive components being zero at the boundaries and (ii) internal chirality positive components being zero at the boundaries. In the case of (i), twofold degenerated chiral zero modes appear which are localized towards specific directions of the rectangle pointed by an angle parameter θ. This leads to an implication for a new direction of pursuing the origin of three generations in the matter fields of the standard model, even though triple-degenerated zero modes are not realized in the six dimensions. When such 6d fermions couple with a 6d scalar with a vacuum expectation value, θ contributes to a mass matrix of zero-mode fermions consisting of Yukawa interactions. The emergence of the angle parameter θ originates from a rotational symmetry in the degenerated chiral zero modes on the rectangle extra dimensions since they do not feel the boundaries. In the case of (ii), this rotational symmetry is promoted to the two-dimensional conformal symmetry though no chiral massless zero mode appears. We also discuss the correspondence between our model on a rectangle and orbifold models in some details.
Choi, M.,Kadara, H.,Zhang, J.,Parra, E.R.,Rodriguez-Canales, J.,Gaffney, S.G.,Zhao, Z.,Behrens, C.,Fujimoto, J.,Chow, C.,Kim, K.,Kalhor, N.,Moran, C.,Rimm, D.,Swisher, S.,Gibbons, D.L.,Heymach, J.,Kaf Elsevier 2017 Annals of oncology Vol.28 No.1
<P>Conclusion(s): Our findings pinpoint mutated genes that may impact clinical outcome as well as personalized strategies for targeted immunotherapies in early-stage LUSC.</P>
Makoto Fujimoto,Koichi Tsuneyama,Yuko Nakanishi,Thucydides L. Salunga,Kazuhiro Nomoto,Yoshiyuki Sasaki,Seiichi Iizuka,Mitsunobu Nagata,Wataru Suzuki,Tsutomu Shimada,Masaki Aburada,Yutaka Shimada,M. Er 한국식품영양과학회 2014 Journal of medicinal food Vol.17 No.3
The metabolic syndrome is a major worldwide health care issue and a dominant risk factor for cardiovascular disease. The liver manifestations of this syndrome include nonalcoholic fatty liver disease (NAFLD) and its progressive variant nonalcoholic steatohepatitis (NASH). Although significant research has been performed, the basic pathogenesis of NAFLD/NASH remains controversial and effective treatments are still unavailable. We have previously reported on a murine model of NASH induced by the neonatal injection of monosodium glutamate (MSG), which includes the clinical manifestations of central obesity, diabetes, hyperlipidemia, and ultimately liver inflammation, fibrosis, and cancer. Although MSG is considered a safe food additive, its administration to pregnant rats increases the voracity and growth hormone levels in the offspring. To further understand the biology of this model, we have investigated the influence of the calorie intake on these clinical manifestations by feeding animals a restrictive diet. MSG-treated animals fed a restrictive diet continue to manifest obesity and early stage NASH but have improvements in serum lipid profiles. At 12 months of age, mice had manifestations of obesity, whether animals were fed a restricted or control diet, but animals fed a restrictive diet had a reduction in the progression of NASH. In conclusion, MSG appears to be a critical factor in the initiation of obesity, whereas calorie intake may modulate the progression of disease.
Numerical Prediction of Cavitating Flow inside Nozzle Hole Based on Cavitation Bubble Dynamics
( Matsumoto M. ),( Kobashi Y. ),( Matsumura E. ),( Senda J. ),( Fujimoto H. ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
In direct injection engines, fuel spray atomization is very important factor for the formation of fuel/air mixture, which influences on the engine performance and exhaust emissions of engine out. Especially, cavitation bubbles breaking out inside the nozzle hole have the significant role for spray atomization process. The purpose of this research is to make the effect of the cavitation on the fuel spray atomization clearly. The numerical model based on the bubble dynamics was proposed in this report, where the behavior of cavitation bubbles is treated as a function of pressure inside the nozzle hole. The prediction of bubble behavior under various conditions in the case of a single bubble was carried out by use of pressure distributions estimated through the experimental results. Primary, the processes of bubble growth and its shrinkage were calculated for each test fuel at given injection pressure. Secondary, the behavior of cavitation bubble was simulated for various initial bubble radiuses. As results of these calculations, although the position of bubble collapsing inside the nozzle hole does not coincide with experimental results, this proposed model predicts quantitatively the temporal change in bubble radius for each case.
Classification of three-generation models on magnetized orbifolds
Abe, T.h.,Fujimoto, Y.,Kobayashi, T.,Miura, T.,Nishiwaki, K.,Sakamoto, M.,Tatsuta, Y. North Holland 2015 Nuclear Physics, Section B Vol.894 No.-
We classify the combinations of parameters which lead three generations of quarks and leptons in the framework of magnetized twisted orbifolds on T<SUP>2</SUP>/Z<SUB>2</SUB>, T<SUP>2</SUP>/Z<SUB>3</SUB>, T<SUP>2</SUP>/Z<SUB>4</SUB> and T<SUP>2</SUP>/Z<SUB>6</SUB> with allowing nonzero discretized Wilson line phases and Scherk-Schwarz phases. We also analyze two actual examples with nonzero phases leading to one-pair Higgs and five-pair Higgses and discuss the difference from the results without nonzero phases studied previously. (Note: this article is registered under preprint number: arXiv:1501.02787 [hep-ph].)
Surfactant-Mediated Molecular Beam Epitaxy of ZnO
H. Suzuki,G. Fujimoto,M. W. Cho,T. Yao,T. Minegishi 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.3
We investigated the effects of atomic hydrogen as a surfactant for plasma-assisted molecular beam epitaxial growth of ZnO. Atomic hydrogen was provided by dissociation of hydrogen gas, and ZnO films were grown on Zn-polar ZnO substrates. The growth mode was observed by using reflected high-energy electron diffraction (RHEED) and the presence of atomic hydrogen enhanced two-dimensional growth. Without atomic hydrogen, ZnO homoepitaxial growth directly on ZnO substrate showed a three-dimensional growth mode. Employing a low-temperature ZnO buffer layer (LT-ZnO) enabled a two-dimensional growth mode. However, with atomic hydrogen, twodimensional growth mode was achieved without using LT-ZnO. Low-temperature epitaxial growth was also achieved. Atomic force microscopy (AFM) measurements showed that the surfaces of ZnO films grown with atomic hydrogen were quite smooth. The structural and the optical properties were characterized using high resolution X-ray diffraction and photoluminescence. Theses properties were improved by atomic hydrogen irradiation. Thus, hydrogen acts an effective surfactant to enhance the layer by layer growth mode.