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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.
Research of Atomization, Spray and its Combustion over 45 years
( H. Gen Fujimoto ),( J. Senda ) 한국액체미립화학회 2010 한국액체미립화학회 학술강연회 논문집 Vol.2010 No.-
The authors have been investigated the phenomena of atomization, spray and its combustion over 45 years, especially, those relating to a CI engine. This paper describes firstly the research of a diesel spray conducted by pioneers in 1920s and 1930s. The other topics are (1) atomization in electrostatic field, (2) diesel spray and (3) diesel combustion. Lastly, the author proposes the proposal to next coming researchers in the field of atomization spray and its combustion.
Research of PCCI Combustion in Doshisha University
H. Gen Fujimoto,J. Senda,Y. Wada 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
PCCI combustion is one of the means to meet with the future severe regulation of exhaust gas through a CI engine. The authors have carried out the experiments of the mixed fuel to realize PCCI combustion. The base of this kind of combustion is the flash boiling phenomena taking place in the mixed fuel. This report describes the summary of the experiments of the characteristics of spray and those of combustion of the mixed fuel and the application of flash boiling spray to a CI engine with a single cylinder conducted in Doshisha University.
Analysis of spatial vapor-phase distribution using the LIF method on multi-component fuel
윤준규,명광재,J. Senda,H. Fujimoto 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.9
We analyzed the vapor-phase distribution and behavior of each component in multi-component fuel (MCF). Evaporation characteristic of MCF was researched by laser-induced fluorescent (LIF) method. A pulsed Nd-YAG laser was used as incident light, and an experiment was performed in a constant-volume vessel so that optical measurement could be possible. MCF was injected through electronically controlled common rail injector into the vessel. I-octane (C8H18), n-dodecane (C12H26) and n-hexadecane (C16H34) were selected to be low boiling point (LO-B.P.), mid boiling point (MI-B.P.) and high boiling point (HI-B.P.) components, respectively, and Fuel A, Fuel B and Fuel C, made by compounding those components at different mass fractions, were used as MCF. Experimentation was performed under the conditions that injection pressures were 42MPa, 72MPa and 112MPa, respectively, ambient gas density was 15kg/m3 and ambient gas temperature was 700K. The spatial vapor-phase distribution, dispersion process of mixture, and vaporphase homogeneity were researched. It was ascertained that the vapor-phase of MCF showed stratified distribution and the dispersion of mixture was improved in proportion to the mass fraction of the LO-B.P. component.
Status of JENDL High Energy File
Y. Watanabe,K. Kosako,S. Kunieda,S. Chiba,R. Fujimoto,H. Harada,M. Kawai,F. Maekawa,T. Murata,H. Nakashima,K. Niita,N. Shigyo,S. Shimakawa,N. Yamano,T. Fukahori 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The present status of the JENDL high-energy file is reported. The recent version (referred to as JENDL/HE-2007) contains neutron and proton cross section data for energies up to 3 GeV for 107 nuclides over the wide mass range from H to Am. The newly evaluated data for 41 nuclides have been added to the first version (JENDL/HE-2004) along with some revisions. The JENDL/HE-2007 includes neutron total cross sections, nucleon elastic scattering cross sections and angular distributions, nonelastic cross sections, production cross sections and double-differential cross sections of secondary light particles (n, p, d, t, ^3He, α, and π) and gamma-rays, isotope production cross sections, and fission cross sections in the ENDF-6 format. The evaluations were performed on the basis of experimental data, nuclear model calculations, and systematics based on measurements. The evaluated cross sections are compared with available experimental data and the other evaluations. Some results of benchmark tests with MCNPX codes are shown.
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.
Kadara, H,Choi, M,Zhang, J.,Parra, E.R.,Rodriguez-Canales, J.,Gaffney, S.G.,Zhao, Z.,Behrens, C.,Fujimoto, J.,Chow, C.,Yoo, Y.,Kalhor, N.,Moran, C.,Rimm, D.,Swisher, S.,Gibbons, D.L.,Heymach, J.,Kafta Elsevier 2017 ANNALS OF ONCOLOGY Vol.28 No.1
<P>Conclusion(s): Our study highlights molecular and immune phenotypes that warrant further analysis for their roles in clinical outcomes and personalized immune-based therapy of LUAD.</P>
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].)