Search Results:　 1-20 of 25

  • 1

    Relationship between the shell height of the predatory moon snail Euspira fortunei and drilled hole diameter on the prey shell of Manila clam Ruditapes philippinarum  [in Japanese]

    TANABE TORU

    宮城県では，近年，サキグロタマツメタによるアサリ食害の被害が拡大している。その対策を行うためにも，サキグロタマツメタの生態学的特性を明らかにすることが非常に重要である。本研究では，サキグロタマツメタが自身の殻高に対してどの程度の殻長のアサリを捕食するかを明らかにするために，穿孔径とサキグロタマツメタの殻高の関係についての回帰式を得た。この式を基に，漁場のアサリ死殻から，捕食であるサキグロタマツメタ …

    NIPPON SUISAN GAKKAISHI 78(1), 37-42, 2012-01-15

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  • 2

    Vibration characteristics of microcapsules with a biocompatible polymer shell under ultrasound irradiation  [in Japanese]

    TABATA Hiraku , KATO Yukako , YOSHIDA Kenji , KOYAMA Daisuke , NAKAMURA Kentaro , WATANABE Yoshiaki

    生体適合性を有するポリ乳酸を膜物質とする中空マイクロカプセルを作製し,その粒径制御を試みた.カプセル径は,作製過程における溶収攪拌の回転速度に大きく依存し,回転速度が速くなるにつれてカプセル径は小さくなることがわかった.回転速度2000〜10000rpmで,カプセル径を数μm〜50μmの範囲で調整可能であった.超音波照射下において,作製したカプセルの振動及び破壊を観測した.レーザドップラ振動計(L …

    IEICE technical report. Ultrasonics 111(158), 91-95, 2011-07-21

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  • 3

    Effect of emission conditions of ultrasound in aggregation formation of microbubbles with their specifications  [in Japanese]

    KODA Ren , WATARAI Nobuyuki , SHIGEHARA Nobuhiko , ITO Takumi , MASUDA Kohji

    これまで我々は、分岐を有する人工血管において微小気泡が流れる流路を超音波を用いて能動的に選択する研究を行ってきた。そしてSecondary Bjerknes forceによる微小気泡の凝集現象に注目し、凝集体を形成することで超音波による制御性が向上することを確認した。ところで、生体内において凝集体は血管を通過できるサイズであることに加えて血流速度に対応して素早く形成される必要がある。しかし凝集サイ …

    IEICE technical report. Ultrasonics 111(88), 13-18, 2011-06-16

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  • 4

    Simplified Model for Spot Welded Joints Using Multi-Point Constraint and its Dynamic Characteristics

    KURATANI Fumiyasu , YAMAUCHI Takashi

    … For the ACM2 model, a spot weld is modeled with a single solid element and the upper and lower plates are modeled with shell elements. … The solid element and the shell elements are connected using multi-point constraint (MPC). … Next, the effects of meshing of the plate surrounding the spot weld on the modal properties (natural frequency and mode shape) are examined in detail. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 77(777), 1748-1759, 2011

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  • 5

    Analysis of an Automatic Steel-teeming Method Using Electromagnetic Induction Heating in Slide Gate System

    GAO Ao , LI Dejun , WANG Qiang , WANG Kai , JIN Baigang , MARUKAWA Katsukiyo , HE Jicheng

    … In addition, the effects of the coil structural parameters (the distance between the molten steel and the coil, the length and the diameter of the coil) and electric current parameters (ampere-turns, frequency) on teeming time were investigated. … The safety of the steel shell under the action of electromagnetic induction heating with the optimal parameters was also checked via the distribution of temperature field on the shell. …

    ISIJ International 50(12), 1770-1776, 2010-12-15

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  • 6

    Experimental Visualization of Local Flow of Shear-Thinning Fluid around a Small Bubble for Pressure-Oscillating Defoaming  [in Japanese]

    IWATA Shuichi , YAMADA Yusuke , KOMORI Shogo , MORI Hideki

    圧力振動脱泡法における気泡上昇メカニズムの解明のため，顔料系インクを用いた粒子追跡手法により，圧力振動場に設置された気泡周りの局所流れを実験的に測定した．この測定には，圧力振動の1周期における気泡形状と，気泡近傍に分散された顔料の位置と単位時間当たりの移動距離とが必要であり，得られた速度分布より気泡近傍の速度勾配を実験的に評価することが可能となる．この実験では，振動周波数が市販ビデオのフレーム速度 …

    KAGAKU KOGAKU RONBUNSHU 34(4), 417-423, 2008-07-20

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  • 7

    Initial Solidification Control of Continuous Casting Using Electromagnetic Oscillation Method

    SUMI Ikuhiro , SHIMIZU Hiroshi , NISHIOKA Shinichi , NAKADA Masayuki , MURAKAMI Katsuhiko , SUZUKI Makoto

    … An initial solidification control technology, called the Electromagnetic Oscillation Method, intermittently applying high frequency magnetic field was developed aiming to reduce the friction between mold and initial solidified shell and to perform high speed casting for producing cast having excellent surface properties. …

    ISIJ International 43(6), 807-812, 2003-06-15

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  • 8

    Cylindrical Magnetic Shield Consisting of Two C-Shaped Blocks with Magnetic Shaking Enhancement

    Tashiro Kunihisa , Sasada Ichiro

    … The shape of the shield is a double concentric shell with two magnetic shunts between the outer and inner shells. … A prototype shield model, (length : 20cm, diameter : 7.5cm, shell thickness : 0.04mm), was made by winding a cobalt-based amorphous ribbon, Metglas2705M, twice around a paper tube cut in half transversally. … A large and constant transverse shielding factor of 1,000 was obtained even against a weak low-frequency magnetic field as low as 0.1Hz, 10nT. …

    Transactions of the Magnetics Society of Japan 3(2), 47-50, 2003-05-01

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  • 9

    The frequency distribution of the shell diametere of Semisulcospira libertina (Gould, 1859) living in the Kodasan-river in Higashihiroshima-shi, Hiroshima Prefecture  [in Japanese]

    Torigoe Kenji , Saiga Yuriko

    … The frequency of the shell diameter of Semisulcospira libertina (Gould, 1859) which inhabits the Kodasan-river in Higashihiroshima-shi was studied through one year. … The prosperous time of the production from the appearance of newborns, the average value of the shell diameter, and the median of the shell diameter is from February to April. …

    Bulletin of the Graduate School of Education, Hiroshima University. Part. II, Arts and science education 50, 11-15, 2002-02-28

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  • 10

    Theoretical Analysis of the Modal Characteristics of Structural and Acoustic Systems of Cylindrical Shells

    MORIYAMA Hiroyuki , YASUI Yoshiaki , KIKUGAWA Hisao

    … This paper theoretically studies the mode characteristics and power flow of a thin cylindrical shell structure, which is a model of aircraft or liquid container. …

    Proceedings of the School of Engineering of Tokai University 23, 99-100, 1998-00-00

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  • 11

    Theoretical Analysis of the Modal Characteristics of Structural and Acoustic Systems of Cylindrical Shells

    Moriyama Hiroyuki , Yasui Yoshiaki , Kikugawa Hisao

    … This paper theoretically studies the mode characteristics and power flow of a thin cylindrical shell structure, which is a model of aircraft or liquid container. …

    Proceedings of the Faculty of Engineering of Tokai University 37(1), 169-175, 1997-00-00

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  • 12

    Control of Initial Solidification of Steel by Application of High Frequency Magnetic Field  [in Japanese]

    NAKADA Masayuki , NISHIOKA Shinichi , OSAKO Takashi , MORI Kentaro , SATO Toshio , OKIMOTO Shinichi

    … This research work was conducted to find the possibility of controlling the initial solidification in the continuous casting processes with the triple point by appling high frequency electromagnetic field. … Since the triple point has a role of initiating solidification shell, proper initiation of solidification at the point is required. … The imposition of high frequency electromagnetic field on the triple point was investigated to achieve the appropriate solidification control. …

    Tetsu- to- Hagane 82(12), 1005-1010, 1996-12-01

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  • 13

    The Birth Frequency, Number and Size of Newborns in the Three Species of the Genus Semisulcospira (Prosobranchia : Pleuroceridae)  [in Japanese]

    TAKAMI Akihiro

    … The birth frequency, number and size of newborns in the three species of the genus Semisulcospira, S. … Mean size (shell diameter) of newborns in S. … Two types was distinguished in the shell size of newborns in S. … Mean size (shell diameter) of small and large type of newborns was estimated 0.60-0.68 mm (max. 0.80 mm) and 0.88-0.99 mm (max. 1.22 mm). …

    The Japanese journal of malacology 50(3), 218-232, 1991-10-31

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  • 14

    Sequential Production of Solid Shells in Liquid-Liquid-Gas Systems  [in Japanese]

    HASHIMOTO Hiroyuki , KAWANO Satoyuki

    … It was found that relatively large and thin solid shells could be produced and the diameter could be controlled easily. … Furthermore, the diameter, size distribution, shell thickness, aspect ratio and production frequency were measured for the wide injection gas conditions. … Useful suggetions for the development of sequential solid shell production were presented. …

    Transactions of the Japan Society of Mechanical Engineers. B 57(539), 2180-2185, 1991-07-25

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  • 15

    The gonadal maturation in Turbo (Batillus) cornutus.  [in Japanese]

    YAMAMOTO Tetsuo , YAMAKAWA Hiroshi

    … The reproductive cycles of the top shell Turbo (Batillus) cornutus in terms of gonad indices and oocyte diameter were related to histological developments of the gonad tissue, using specimen collected during the period July, 1979 to September, 1980 in Chikura coasts of Chiba prefecture, Japan.Histological observation indicated that the ovary and testis ripened from May through Septem-ber. … The polygonal diagrams of egg size frequency were increased in May and dropped suddenly in September. …

    NIPPON SUISAN GAKKAISHI 51(3), 357-364, 1985

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  • 16

    WIND-EXCITED OVALLING VIBRATION OF THIN CIRCULAR CYLINDRICAL SHELL WHICH HAS DIMENSIONS LIKE SILOS  [in Japanese]

    KATSURA SHIGEKI

    … Vibration characteristics and its growth mechanism of wind-excited ovalling vibration of thin circular cylindrical shell which has dimensions like silos were made clear by carrying out various kinds of wind tunnel tests. … (1) Wind pressure characteristics acting on the circular cylindrical shell. … (2) Static and dynamic response of wall of circular cylindrical shell. …

    Transactions of the Architectural Institute of Japan (337), 73-80, 1984-03-30

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  • 17

    SEISMIC RESPONSE OF SHELL STRUCTURE SUBJECTED TO SPATIALL VARIANT WAVES : Part 2 Response of Ring Foundation  [in Japanese]

    MATSUI GENGO , SEYA HITOSHI

    … Numerical results are examined in the range of low frequency by Tajimi's approximate method (1). … The stresses and displacements in the ring are calculated by solving the boundary condition in frequency domain. … 2) In the range of low frequency where the displacement component of seismic waves is large, the axial stress in the circumferential direction of n=0 and the bending stress of n=2 are predominant among the other stress components. …

    Transactions of the Architectural Institute of Japan. (289), 69-78, 1980-03-30

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  • 18

    Rearing of SIEBOLD's Globular Snail Acusta despecta (SOWERBY) on a Semi-Synthetic Diet  [in Japanese]

    KOHNO Masahiro

    … Newly hatched snails were caged in a small plastic container (diameter : 13.5 cm, height : 3.5 cm, diameter of ventilation hole on top : 1.0 cm) and transferred into a larger one (diameter : 15.0 cm, height : 8.5 cm, diameter of ventilation hole : 4.0 cm) when they attained a growth stage of 6 mm in shell-height. …

    The Japanese journal of malacology 35(2), 50-62, 1976-06-30

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  • 19

    Flexural Vibrations of a Ring

    ENDO Mitsuru , TANIGUCHI Osamu

    … The frequency determinant is derived by means of the Ritz's method on the basis of the theory of a circular cylindrical shell, which considers the influence of rotatory inertia and transverse shear deformation in addition to the usual membrane and bending effects. …

    Bulletin of JSME 14(74), 761-771, 1971-08-00

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  • 20

    Some Considerations on the Life of Work Rolls for Cold Rolling  [in Japanese]

    IKETAKA Satoshi , NOHARA Kaoru

    … (1) The frequency of the "burning" when the strip was broken reaches 13.5% of the total times of roll changing, and the sum of ground thickness attributable to the cause of burning amount up to about 70% of the total ground thickness. … Band-type fatigue fracture is chiefly seen in cold rolling and in rather large diameter roll, and on the other hand, shell-type fatigue fracture is seen in temper rolling and in small diameter roll. …

    Tetsu- to- Hagane 57(5), 795-807, 1971-04-01

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