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Matsumoto Hiroyuki,Amagai Kenji,Yuminaka Yasushi,Keith Barry 한국공학교육학회 2012 공학교육연구 Vol.15 No.5
Shu-gyo-ryoku, a program to enhance students’ academic and career skills, was begun in the academic year 2011. Under the new program, “Career Planning” and “Career Design” were introduced as part of the liberal arts education for incoming freshmen. Approximately 500 students majoring in engineering enrolled in “Career Planning”, in which they study a “curriculum map” and how it relates to their future fields of employment. The curriculum map illustrates the connections between classes and increases students’understanding of the curriculum structure. In small groups, students discussed the curriculum in order to develop sketches of their career paths. In addition, students answered a career anchor test and though several communicative activities, improved their communication skills. A portfolio system was built into the university network to record the learning history of each student. Students are able to check their learning histories and reflect on the change in themselves during their academic careers.
A Proposal of Wheel/Rail Contact Model for Friction Control
Kosuke Matsumoto,Yoshihiro Suda,Hisanao Komine,Takuji Nakai,Masao Tomeoka,Kunihito Shimizu,Masuhisa Tanimoto,Yasushi Kishimoto,Takashi Fujii 대한기계학회 2005 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.19 No.1S
Controlling the friction between wheel and rail is direct and very effective measures to Improve the curving performances of railway trucks, because the curving performances depend much on friction characteristics Authors have proposed a method, "fllction control", which utilizes friction modifier (KELTRACKTM HPF) with onboard spraying system With the method, not only friction coefficient, but also fuction characteristics can be controlled as expected In this study, MBD simulation is very valuable tool to foresee the effect of the contiol In advance of experiment With real car And the creep characteristics of wheel/rail contact With the friction modifier takes very Important role In the simulation In this paper, authors propose a theoretical model of wheel/rat I contact condition considering the creep characteristics of friction modifier, Which is derived the application of principle tribological theories<br/>
Hiroyuki Matsumoto,Kenji Amagai,Yasushi Yuminaka,Barry Keith 한국공학교육학회 2012 공학교육연구 Vol.15 No.5
Shu-gyo-ryoku, a program to enhance students’ academic and career skills, was begun in the academic year 2011. Under the new program, “Career Planning” and “Career Design” were introduced as part of the liberal arts education for incoming freshmen. Approximately 500 students majoring in engineering enrolled in “Career Planning”, in which they study a “curriculum map” and how it relates to their future fields of employment. The curriculum map illustrates the connections between classes and increases students’understanding of the curriculum structure. In small groups, students discussed the curriculum in order to develop sketches of their career paths. In addition, students answered a career anchor test and though several communicative activities, improved their communication skills. A portfolio system was built into the university network to record the learning history of each student. Students are able to check their learning histories and reflect on the change in themselves during their academic careers.
Frequency Regulation for Parallel-Connected UPS system under Independent Control
Atsuo Kawamura,Ryota Oikawa,Yasunari Yoshioka,Yasushi Matsumoto 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
This paper proposes a frequency regulation technique for the stable operation of parallel connected UPS system under the independent control proposed by authors group. The features of independent control of parallel UPS are (1) stable operation is guaranteed by sensing the output current of each UPS, and no communication is required between the UPS’s, (2) The phase and amplitude of each UPS voltage are generated by a simple PI controller, (3) The lateral current between the UPS’s are compensated by the lateral current compensator, (4) the load sharing is autonomously achieved, (5) the system frequency changes depending on the control gains and load. The last disadvantage is now solved by adding a simple control loop in the independent control. The paper presents the theory, simulation and experiments.
Hierarchical spatial heterogeneity in liquid crystals composed of graphene oxides
Shundo, Atsuomi,Hori, Koichiro,Penaloza, David P.,Matsumoto, Yuji,Okumura, Yasushi,Kikuchi, Hirotsugu,Lee, Kyung Eun,Kim, Sang Ouk,Tanaka, Keiji The Royal Society of Chemistry 2016 Physical chemistry chemical physics Vol.18 No.32
<P>Graphene oxide (GO) is a class of two-dimensional materials with a thickness of about 1 nm and a broad distribution of lateral dimension commonly approaching several micrometers. A dispersion of GOs in water often forms a liquid crystal, which is expected to be a promising precursor for the fabrication of carbon-based materials with well-ordered structures. To accelerate the application of GO-based liquid crystals, their structures and physical properties at various sizes must be well understood. To that end, we examined the local rheological properties of GO-based liquid crystals in the nematic phase using a particle tracking technique, where local properties can be accessed by observing the thermal motion of embedded probe particles. Particle diffusion was spatially heterogeneous, and depended on the size of the particles. Such a size-dependent heterogeneity can be associated with a hierarchical local environment, which is time-dependent for this system. The anisotropic particle diffusion originated from particles trapped in between the GO layers and in isotropic-like regions. The aggregation states of the GO dispersion composed of nematic and isotropic-like regions were observed using confocal laser scanning microscopy.</P>
Koura, Nobuyuki,Matsuzawa, Hidenori,Kato, Tomoki,Idemoto, Yasushi,Matsumoto, Futoshi The Korean Electrochemical Society 2002 한국전기화학회지 Vol.5 No.4
The structure of species formed in $NbCI_5-I-ethyl-3-methylimidazolium$ chloride (EMIC) room-temperature molten salt (RTMS) was examined with the Raman spectroscopic measurement and ab initio molecular orbital calculation. The equilibrium structures of $NbCl_5,\;NbCl_6^-,\;Nb_2CI_{10},\;Nb_2CI_{11}^-,\;Nb_3CI_6^-,\;NbCI_6^--EMI^+\;(in\;which\;NbCI_6^-$ anion approaches $EMI^+$ cation with strong interaction) and $Nb_2CI_{11}^--EMI^+$ were obtained with the HF/LANL2DZ level of calculation. The harmonic frequencies at each equilibrium structure were compared with Raman spectra. The harmonic frequencies of $NbCI_6^--EMI^+,\; Nb_2CI_{11}^--EMI^+,\;and\;Nb_2CI_{10}$ were in good agreement with the Raman spectra of RTMS melts. In the $NbCI_5-EMIC RTMS$, the main species were $NbCI_6^-\;and\;EMI^+$. In the $NbCl_5-EMIC$ RTMS added $NbCl_5\;over\;50mol\%$, small amount of $Nb_2CI_{11}^-\;and\; Nb_2CI_{10}$ were also formed. The structures of anions and cation in the RTMS distorted from free ions with Coulomb force.
Koura, Nobuyuki,Minami, Takuto,Etoh, Keiko,Idemoto, Yasushi,Matsumoto, Futoshi The Korean Electrochemical Society 2002 한국전기화학회지 Vol.5 No.4
The electrochemical behavior of binder-free carbon anode, comprising of only artificial and natural graphite (AG and NG) particles, for intercalation and deintercalation of lithium ion $(Li^+)$ in aluminum chloride (AICI_3)-I-ethyl3-methylimidazolium chloride (EMIC)-lithium chloride (LiCl)-thionyl chloride $(SOCI_2)$ room-temperature molten salt (RTMS) was studied. Binder-free carbon electrodes were fabricated using electrophoretic deposition (EPD) method. The binder-free carbon anodes provided a relatively flat charge and discharge potentials $(0\;to\;0.2V\;vs.\;Li/Li^+)$ and current capabilities $(250-340mAh{\cdot}g^{-1})$ for the intercalation and deintercalation of $Li^+$. Stability of the binder-free carbon anodes for intercalation and deintercalation of 50 cycles was confirmed.
Nakamura Takako,Nakao Asuka,Watanabe Minami,Ueda Kinji,Matsuda Toshihiko,Matsumoto Seiji,Yamaguchi Toshiharu,Haikata Masaho,Kaneko Asuka,Shirota Koji,Sasaki Azusa,Okamoto Shigehisa,Nakamura Yasushi 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-
Introduction: This study aimed to review the farming activity and the administrative measure to successfully increase the distribution of heirloom vegetable “mizuna” nationwide by examining the paradigm shift in the use of its young less-branched form for salad. We also discussed that breeding programs of the young form ironically resulted in reduction the flavor and the antimutagenicity of this vegetable. Methods: Through hearing survey, we explored reasons for the successful nationwide distribution of heirloom vegetable, mizuna. Through chemical analysis, the fragrant ingredients in mizuna, their antimutagenicity and the changes in their amount for one year were determined. Results and discussion: The primary factor for commencing the distribution of mizuna includes the new idea of using young less-branched form of mizuna as salad ingredient, which has been recognized by most who were involved in promoting the distribution of mizuna among farmers, distributors, and employees of agricultural extension section at Kyoto Prefecture office. The secondary factor is the fact that the primary factor coincides on a time axis with other two factors: the occurrence of the boom of Kyoto’s heirloom vegetables and the Vegetable Management Stabilization Project found as a measure of Kyoto Prefecture. We determined three fragrant compounds in mizuna, 3-butenyl isothiocyanate, 3-phenylpropionitrile, and phenylethyl isothiocyanate, of which their antimutagenic effects were also identified. Those amounts were highest at the best harvest season called ‘Syun’ in the past because of the cold temperature of Japanese winter in traditional open-field cultivation. Conclusion: It implied that the successful nationwide distribution of mizuna resulted from the administrative measures based on the paradigm shift in the new use of mizuna for salad due to increase in demand of the vegetable in contemporary dishes. The traditional cultivation of mizuna might be suitable if wishing the flavor and antimutagenicity at the best harvest season ‘Syun’.