RESEARCH REPORTS OF NATIONAL INSTITUTE OF TECHNOLOGY, OYAMA COLLEGE
Online ISSN : 2432-3500
Print ISSN : 0288-2825
Volume 45
Displaying 1-22 of 22 articles from this issue
  • Tsugio INOUE, Takako SHIMADA
    2012 Volume 45 Pages 1-10
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    To effectively convey information, particularly, those on books and facilitate the use of libraries, it is important to improve the facilities and provide a better environment. Additionally, not only is it essential to understand the user's needs and addressing them, the sender of information needs to actively convey information that is useful to users.
    In this study, I examined the measures that are currently followed by the center in conveying information by reviewing its roles and achievements, and then discuss its future.
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  • Focusing on Change in Science Communication in Japan
    Tetsu UENO
    2012 Volume 45 Pages 11-20
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The purpose of this paper is twofold: Firstly, to point out that neither before nor after the Fukushima nuclear accident in March, 2011, has there been much discussion in science cafes about the peaceful use of nuclear power in Japan; especially, the merits and demerits of nuclear power plants focusing on Science and Technology in Society. Secondly, and given the above, using data from my practice, I would like to introduce an effective strategy to foster much needed discussion on the merits and demerits of nuclear energy in the context of STS.
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  • Daisuke MIHARA, Tomoki NAGATA
    2012 Volume 45 Pages 21-28
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This study investigated the upswing in track-and field for a junior high school and high school students of the boy. The method intended for a player in the national ranking 100th place of 1981 and 2011 and compared the rate of climb of the record of the 50th place and 100th place with the first place. As a result, the upswing in record was seen with each ranking by the short-distance race of the high school student in these 30 years. Furthemore , a junior high school and high school student was each ranking together, and by a middle-distance race and long-distance race, shortening of the record was seen.
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  • Tomoki NAGATA
    2012 Volume 45 Pages 29-34
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The purpose of this study was to compare daily physical activity and physical fitness of 2011 with that of 2010 in OYAMA National College of technology students. Subjects were 14 (age;16.9±0.3, BMI;22.1±3.7) student. All subjects wore activity monitor (Lifecorder-GS, KENZ, Japan; LC) over a seven-day period, in order to determine the Walk-steps, Exercise[Ex], daily physical activity and time engaged in each of the 3 level physical activity (LC1-3, LC4-6, LC7-9). The index of physical fitness level was evaluated by a new physical fitness test. As a result, Walking-step were 8658[step] for subjects. There were significantly improvement in subjects of 2011. Physical activity time in intensity of LC7-9 was 8±10 for subjects on ALL day, and 10±9 for subjects on Weekends. There were significantly improvement in subjects on ALL day and Weekday of 2011. Finally, Exercise (Ex) in the subjects was lower than guideline. In subjects, a total point of physical fitness tests was lower than national mean value. These results suggest implicate that there should be a need to increase the physical activity time to improve physical fitness level.
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  • Action Research
    Sakae SUZUKI
    2012 Volume 45 Pages 35-44
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This paper explores the incorporation of peer feedback in process-oriented English writing instruction. Participants were forty-one students at Oyama National College of Technology. Data include the pre-questionnaire and post-questionnaire with students 'reflection. Results implicate that peer feedback was beneficial for students to assist them in becoming good writers of English.
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  • Toshihiro YAMANISHI
    2012 Volume 45 Pages 45-54
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This study researches what kind of English examinations are suitable for junior and senior high school students. The STEP Tests have been said to be essential for them, whereas TOEIC, TOEIC Bridge and other tests have been popular generally. This research shows how effective these tests are for English learners at these schools.
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  • Susumu YAMASHITA, Okito OJIMA, Yuri MOCHIZUKI, Hideo KOGUCHI
    2012 Volume 45 Pages 55-60
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Recently, bonded structure is used for many machine parts and electronic components. But,it may cause stress concentration near the corners. This leads to a decrease in strength, and reliability is lost. Therefore, it is necessary to evaluate the stress characteristics at a vicinity of vertex in bonded structures. There is stress singularity parameter to evaluate the stress characteristics. The stress state of a junction interface can be known by analyzing this singularity parameter. In this paper, stress characteristics in the junction interface of anisotropic bonded structures are analyzed by finite element method. As a result, the influence that the joint angle and ratio of Young's modulus gave to the stress characteristic is clarified.
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  • Flow Analysis around a Thick Airfoil with a Discrete Vortex Method.
    Hisashi MASUBUCHI, Hiroki KANEDA
    2012 Volume 45 Pages 61-68
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This paper reports on the development of simple numerical wind tunnel by using spreadsheet software. Macro-function (Excel VBA) installed in the spreadsheet software realized the wind tunnel that could analyze the flow around a thick airfoil just by coding a short program. Flow around a NACA-airfoil and a Joukowsky-airfoil was simulated by means of the developed numerical wind tunnel with a discrete vortex method. The calculated results were compared with that of experiment or analytical solution in order to examine the accuracy of the numerical simulation. In the result, developed numerical wind tunnel could calculate the lift generated by an airfoil with satisfactory accuracy. But that indicated the wrong surface pressure distribution on the airfoil because of its computational technique. It was concluded from this study that the numerical wind tunnel using a spreadsheet had the potential to simulate more complex flow.
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  • Takashi KAWAMURA
    2012 Volume 45 Pages 69-72
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This paper is the result that application limit of Linear Notch Mechanics. I inspected Notch radius and Notch length. Notch radius is important to Linear Notch Mechanics.
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  • Yuki NASU, Soma YAMASAKI, Yosuke TOMITA
    2012 Volume 45 Pages 73-76
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Fretting damage is a phenomenon occurring at contact interfaces by two contacting bodies, the in-situ or direct observation in necessary to investigate the mechanism of the phenomenon and its process. In this paper, a small specially designed piezoelectric fretting wear testing device was developed for the purpose. The fretting wear tests were carried out under the Hertzian contact of steel ball and glass plate. The experimental results showed that the appearance of worn surfaces fretted annulus, spread with increasing number of cycle, and process of crack initiation.
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  • Yukio KOBAYASHI, Takayuki SATOU
    2012 Volume 45 Pages 77-80
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    In this study, we focused on the study of recording method which is hardly influenced by ambient noise. We carried out the noise tolerance experiment which evaluates the influence on quality of recording by ambient noise environment in 4 kinds of recording methods, then compared and evaluation its.
    In the result, recording methods by piezoelectric transducer were hard to be influenced by ambient noise. And we clarified that if the noise doesn't be mixed in frequency band of heart sound, influence of noise could be controlled without the decay of quality of recorded heart sound by using low-pass filter which can cut frequency band higher than heart sound.
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  • Manabu ISHIHARA, Yasuhiro KATO, Akio TANAKA
    2012 Volume 45 Pages 81-84
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    To study the interaction between electricity and magnetism, a paper clip electric motor is one of the most popular teaching materials. The function of the electric motor is based on the interaction between electricity and magnetism.The paper clip electric motor is built with a permanent magnet and a coil by winding the copper wire several times and creating loops. However the simplicity of making a coil does not allow plenty of scope for student's activities. In this paper, we analyze the velocity characteristics concerning the magnetic power of a paper clip motor car. The experiment results enable us to create the various types of paper clip electric motor car. The experimental classes showed that the variety of the clip motor car stimulates the students' creativity.
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  • Masakatsu SENDA, Junki FUKUDA, Yosuke KAIHARA
    2012 Volume 45 Pages 85-90
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This work reports influences of the cyclic function (CF) noise on reproduced image quality and bit error rate (BER), and a calculation amount reduction effect by the sub-sampling (SS) method, in the computer-generated hologram (CGH). The CF noise occurs especially at edges of the image, distorts reproduced bright spots, and causes errors. The zero-padding (ZP) method suppresses the CF noise completely, although the calculation amount increases by 4 times as compared with the cyclic calculation. The SS method is useful because it can reduce the amount by 1/4 and does little harm to BER although it deteriorates the image a little more than the ZP method.
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  • Kazuo IMANARI, Takuya SAKURAOKA, Hiroshi OHASHI
    2012 Volume 45 Pages 91-98
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    We proposed and developed a prototype of new Living Guidance System for type2 diabetics. The system is aimed for the improvement of instruction environment, the simplification of duties, and the offer of effective data to guidance. It designed to executable on Apache firewall server as a Web application with portable personal digital assistant terminal. The system was tried on the medical treatment for a week and the questionnaire survey of the system performance was carried out. On Correspondence Analysis, the effectiveness was confirmed.
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  • Yasunori KOBORI, Haruo KOBAYASHI
    2012 Volume 45 Pages 99-104
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    This paper proposes a new SIMO (Single Inductor Multi Output) DC-DC converter design with exclusive control. It requires few additional components (a comparator and a latch) to control two DC-DC converters with single inductor, buck and buck converters or boost and boost converters.. We investigated exclusive control method which converts only one converter except another converter for some clock periods. The architecture of exclusive control method is to compare two errors of the output voltage and to decide the converter that is controlled next time. This control method has the merit not to depend on either output voltage or output current. We describe circuit topologies, operation principles and simulation results.
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  • Kiyomi NANSAI, Uchu YAMAGAMI
    2012 Volume 45 Pages 105-110
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    With spread of tablet PCs and mobile devices, the needs to connect with wireless LAN freely and to access to the Internet are increasing. A lot of wireless LAN access points are already installed in the classroom or the laboratory in the campus. However, some of those are low security level and we can also see interference of a channel. When these are neglected, there is a possibility of causing a serious security issue. We made a wireless LAN authentication system with a RADIUS server and a LDAP server, which can manage the authentication from many wireless LAN access points in a unified manner.
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  • Masato KASAHARA, Ittoku KURISHIMA
    2012 Volume 45 Pages 111-116
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The controlled object of this study is a two-layer tank system. The neural network's view was used a technique for carrying out system identification. And, model predictive control is used the control technique. The validity and adaptability of these control schemes were examined.
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  • Takakuni TANAKA, Kiyotaka MUKASA, Yuko KAWADA
    2012 Volume 45 Pages 117-122
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    As domestic waste water becomes the high density, treatment of waste water using septic tank gradually became difficult. Therefore, we showed a newly pretreatment unit (Mashiko-Clean type III) for septic tank. This characteristic of this unit is a bubble column type aerator of three towers, and it has strong aerating system. In this paper, we evaluated an ability of waste water treatment from various parameters with water analysis. As a result, this unit has degradability of carbon compounds in simulation waste water. COD and BOD were always less than a discharge lower limit value. On the other hand, there was not an anaerobic space, this unit could not removal nitrogen (nitrite nitrogen) and phosphorus compounds. To give the performance of this unit conventionally, we must improve setting (or auditioning) of the anaerobic areas and circulation function between the towers.
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  • Hajime YOKOUCHI, Ryuichi OSHIMA, Yoshimitsu OHASHI
    2012 Volume 45 Pages 123-132
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Tochigi City in Japan is left with many traditional buildings, which form the historic townscape. The 2011 off the pacific coast of Tohoku Earthquake on March 11, 2011 and subsequent aftershocks caused damage to many of these traditional buildings. Only few data are available on seismic performance of these buildings at present. Therefore, in this paper, the researchers conducted study and survey relevant for these buildings. The following activities were taken place.
    1. Collecting and analyzing seismic records observed around the area concerned as well as evaluating input motion characteristics for the subject area.
    2. Field survey was conducted to understand the damage situation caused by series of earthquakes. Then consider the relationship between the damage trends and the various influencing factors.
    3. Vibration measurements were performed on traditional buildings in the subject area, and comprehend the vibration characteristics of traditional buildings.
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  • Tsuyoshi DEGAWA, Tarou ATSUMI
    2012 Volume 45 Pages 133-140
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    We reported the research of student's progressive approaches ability through the operation of fundamental chemical experiments such as preparation of the solution and dilution of solution.
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  • Tadashi UEKI, Yasuhiro KATO, Tomokazu SATOU
    2012 Volume 45 Pages 141-144
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    Radio wave in HF band (3.5, 3.8MHz) repeats refractions and reflections between the ground and the ionosphere. So it is possible to long range wireless communication. We made inexpensive and movable 1/4λ whip antennas for use in an emergency. This paper reports performance evaluation by changes shape of 1/4λ whip antennas.
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  • "Itoma-no- ki" written by KURODA, Naokuni
    Yoko SAKAIRI
    2012 Volume 45 Pages 145-154
    Published: December 21, 2012
    Released on J-STAGE: September 20, 2020
    RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS
    The old document named "Itoma-no- ki" was written in 1713, by Naokuni KURODA, the Feudal Lord of Shimodate. This modest contribution of "Itoma-no- ki" assists in further analyzing the relationships between different regions in the Edo period.
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