RESEARCH REPORTS OF NATIONAL INSTITUTE OF TECHNOLOGY, OYAMA COLLEGE
Online ISSN : 2432-3500
Print ISSN : 0288-2825
Volume 51
Displaying 1-14 of 14 articles from this issue
  • Tetsu UENO
    Article type: Article
    2018 Volume 51 Pages 1-6
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Das japanisch Ausbildungssystem der Fußball Trainer ahmt das deutsche Ausbildungssystem nach. Viele japanische Fußballspieler betätigen sich in der Bundesliga. Deutschland ist auch ein beliebtes Trainingsland für japanische Fußball Trainer. Hingegen ahmte das japanische Ausbildungssystem der Fußball Shiedsrichter, das deutsche Ausbildungssystem nicht nach. Warum hat Japan das deutsche Ausbildungssystem hier nicht nachgeahmt? Der Zweck dieses Aufsatz ist, die Erforschung dieser frage in anbetracht meiner Erfahrungen in Deutschland.
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  • Hidenori NAKAGAWA
    Article type: Article
    2018 Volume 51 Pages 7-15
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This paper describes instability analyses of plane strain finite deformation elasto-plastic problems in the frame of total Lagrangian(i.e. TL) formulation. In spite of instability analyses of plane strain finite deformation elasto-plastic problems are well known, the reasons why the author covers these problems in this paper are as follows. The author studies applications of spectral stochastic finite element method (i.e. SSFEM) to finite deformation elasto-plastic problems. In this field, Acharjee and Zabaras presented in 2006 a paper concerned with applications of SSFEM to the finite deformation elasto-plastic problems, where they treated stable analyses in a frame of TL formulation. On the other hand, the author has constructed nonlinear SSFEM in a framework of updated Lagrangian(i.e. UL) formulation. Both of these are theoretically equivalent, but numerical analysis produces differences as a matter of course. In order to compare them, unstable analysis was carried out as an earlier study in the frame of ordinary nonlinear Finite Element formulation not including probability.
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  • Kayoko MORISHITA, Ayaka SUTOU, Tetsuya HATORI, Takako MIYASHITA, Katsu ...
    Article type: Article
    2018 Volume 51 Pages 16-19
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The rice husk is agricultural waste exhausted 2Mt a year in Japan. A small portion of the rice husk is used as compost now. However, composting in itself is difficult because 20% of silica is included in rice husk. Authors have been proposed a package of the use of the organic matter as an energy source and the inorganic matter in rice husk as concrete admixture, as one of the utilization of the rice husk. In this paper, we report about study on efficiency evaluation of rice husk ash as concrete admixture.
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  • Tomoki NAGATA
    Article type: Article
    2018 Volume 51 Pages 20-29
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    We have been continuing performance measurements from 2010 for athletes who participate in national elementary school student athletics games. Therefore, this time as the 1st report, we sum up the results of the performance measurement and compare between the years. Also, it aimed to compare between the years of relay members who achieved a good result. The subjects of this measurement were 56 male and female athletes in elementary school 6th grade (male: 27, female: 29) that participated in the national elementary school student athletics games. As a result, 50 m sprint and power-max 1kp values for male short-sprint group and relay members were found to be higher than 2010 and 2012. Additionally, 50m sprint and power-max 1kp values of female short-sprint group and relay members were found to be higher than 2010 and 2012.
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  • Masaya OKAWA, Susumu YAMASHITA
    Article type: Article
    2018 Volume 51 Pages 30-34
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Much of a wheelchair can't do getting of a high step. In this study, to solve such a problem, the 1/2 scale model of the electric wheelchair using locker bogie mechanism was produced experimentally. As a result of performance test, a step of up to 36mm was shown to get over it safely.
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  • Takashi KAWAMURA
    Article type: Article
    2018 Volume 51 Pages 35-38
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This research reported on the analysis accuracy of the two FEM software with respect to analysis of strip with cracks using FEM. Crack length was analyzed on three kinds of strips. Stress Distribution near the Crack Tip end The opening displacement near the crack tip end was investigated. It is considered that there is almost no analysis error by FEM software.
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  • Yuki NASU, Ren NISHIZAWA, Susumu YAMASHITA, Shigeru TANAKA, Yuya KOBAY ...
    Article type: Article
    2018 Volume 51 Pages 39-42
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Engineering test according to standards is necessary for assistive products. However, since the equipment using hydraulic pressure is used in the load test and the durability test, they are expensive and the scale of the tests is large. In this research, in order to carry out the tests utilizing an arm robot, we made a jig for a sitting posture support devices and prepared the operation program for the arm robot, then conducted and evaluated the tests according to the standards. As a result, we found that the arm robot is effective for the tests.
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  • Tatsuo WATANABE
    Article type: Article
    2018 Volume 51 Pages 43-47
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Chaos Time Series predicting by two-dimensional Voronoi Tessellation method was performed by this thesis. Voronoi Tessellation method does Voronoi division in a plane and predicts time series by a weight of area. As a result, it was predicted well in Chaos Time Series. The tendency of the change could be predicted in the natural world time series.
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  • — Introduction to engineering experiment —
    Masato KASAHARA, Taich KOSHIMURA
    Article type: Article
    2018 Volume 51 Pages 48-51
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    To automatically control a dynamic system needs modeling the system. System identification which is one method of modeling requires input-data and output-data of the system. This study considers system identification using myRIO as an interface for collecting experiment data. Labview is used as the development software for myRIO. Data transfer between myRIO and PC is realized by DMA FIFO. Based on the result of identifying a 1st-order RC circuit, we consider the selection of input signals and selection of model structure in system identification.
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  • Izumi SASANUMA, Takashi TSUKAHARA, Ayato OHASHI, Kyouya SHIGETA
    Article type: Article
    2018 Volume 51 Pages 52-55
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Phytochemicals such as polyphenols, steroid saponins, and polysaccharides are consumed as a food and are also widely used in traditional Chinese medicine. In this work, we define the roles of polyphenols, steroid saponins, and polysaccharides from kanpyo, dioscorea, and barley in the productions of β-glucosidase in iPS cells (iPSCs). First, we isolated polyphenols, steroid saponins, and polysaccharides from kanpyo, dioscorea, and barley, and iPSCs were treated by the isolated compounds. The polyphenols, steroid saponins, and polysaccharides stimulated the proliferation of iPSCs. The β-glucosidases in iPSCs were induced by the steroid saponins. On the other hand, the induction of β-glucosidases was inhibited by the polysaccharides and polyphenols. Our results indicate that the β-glucosidases involved in the metabolism of sphingolipids such as glucosylceramide are stimulated by the steroid glucosides and are inhibited by the polysaccharides and polyphenols. We conclude that the phytochemicals affect the production of β-glucosidases involved in the autophagy.
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  • Taro ATSUMI, Tsuyoshi DEGAWA
    Article type: Article
    2018 Volume 51 Pages 56-60
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    X-ray diffraction on small areas of a sample is examined with a point-focused X-ray beam, double crossed slits and a one-dimensional semiconductor detector. A size of an X-ray exposure area on the sample is larger than that of slit width and increases with a decreasing of angle 2θ. X-ray diffraction patterns on small areas of an Ōya tuff stone are affected by the X-ray exposure area.
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  • Takakuni TANAKA, Ryo KOBAYASHI, Kazuho NAKAMURA
    Article type: Article
    2018 Volume 51 Pages 61-65
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Crystallization is the purification process where a solid forms organized in a structure known as a crystal. This process consists of two major factors, nucleation and crystal growth which are driven by thermodynamic properties as well as chemical properties. A crystal formation is to dissolve the solid in a solution at high temperatures to obtain supersaturation. The dissolved solution is allowed to slowly cool. In this report, the effects of operating conditions including cooling rate and temperature gradient were investigated on the morphology evolution of L-glutamic acid in batch tank. Based on the crystal morphology growth during the crystallization process, it was found that the products tend to be needle-like or plate-like under a slow cooling rate. The operating conditions of a faster cooling rate and higher initial super saturation tended to produce wide plate-like crystals. The aspect ratio of crystals was taken as a shape index to analyze the crystal morphologies. Experimental verifications were performed to illustrate the proposed guidelines on the operating conditions for cooling rate of L-glutamic acid solution.
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  • Keita KASHIMA, Yuki OKANOYA, Yusho EZURA, Makoto UEDA
    Article type: Article
    2018 Volume 51 Pages 66-70
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The baking characteristics of Saccharomyces cerevisiae isolated from Omoigawa Sakura, named OPJ-1, were investigated. The produced amount of CO₂ during fermentation was evaluated from van der Waals equation with the measured pressure inside a constant-volume bottle. OPJ-1 performed sufficient CO₂ production in same level with commercial yeasts. On the physical properties of the baked bread, OPJ-1 led to not only lower compressive stress corresponding to softer texture but also higher specific volume of the baked bread. It was revealed that both the compressive stress and the specific volume were correlated well. As evaluation of freeze tolerance of OPJ-1, the specific volume of bread baked after the pre-fermentation at 30 °C, freezing storage at -20 °C, thawing at 25 °C and the second-fermentation at 30 °C was evaluated. The bread baked with OPJ-1 kept higher specific volume in spite of frozen for 1 week. OPJ-1 possesses sufficient fermentation capacity and bread making ability in comparison with commercial baking yeast.
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  • Tadashi UEKI, Tomokazu SATOU
    Article type: Article
    2018 Volume 51 Pages 71-74
    Published: December 27, 2018
    Released on J-STAGE: July 26, 2019
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    A mobile antenna of the 433 MHz band (wavelength 70 cm) in amateur radio generally has an element length of about 0.7 to 1.5m. There is no data of a moving antenna with an element length of about 10m. We devised and fabricated a 10 m long-wire inverted-L antenna and made a simple evaluation. In this paper, we describe the outline and effectiveness of this antenna.
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