Search Results 1-20 of 210

  • Interface Reaction and Contact Stability of High-Current Press-fit Connection  [in Japanese]

    EGUSA Minoru , ISHIBASHI Hidetoshi , OTSUBO Yoshitaka , KIKUCHI Masao , KASHIBA Yoshihiro

    … Basic behavior of contact resistance and interface reaction were studied. … A mixture layer between pin and through hole plating was formed by press-in process, and this process caused to remove an oxide film in order to obtain low contact resistance. … We solved the problem by designing constriction portion for the body part of press-fit pin, and clarified by thermal cycle test on power modules. …

    Journal of Smart Processing 7(4), 139-145, 2018

    J-STAGE

  • Experimental and Theoretical Studies on Thermal Contact Resistances for Flat Convex Rough Surfaces between Two Aluminum Rods  [in Japanese]

    DO Taewan , KOITO Yasushii , TOMIMURA Toshio

    … Based on a concept of analogy between an electric and a thermal resistance network, two simple equations to evaluate the TCR for the flat convex rough surfaces were derived. … The simple equation of Case I was moreover modified to consider the influence of the constriction/spreading resistance in the rods, and its validity was confirmed by comparing the calculated values with the experimental results. …

    Thermal Science and Engineering 26(4), 65-72, 2018

    J-STAGE

  • Relationship between Copper Patterns and Temperature Rise of Printed Circuit Board for Small Surface Mount Electronic Components in Terms of Constriction Thermal Resistance

    Aruga Yoshinori , Hirasawa Koichi , Aoki Hirotoshi , Hatakeyama Tomoyuki , Nakagawa Shinji , Ishizuka Masaru

    … Using the concept of constriction thermal resistance, the temperature of the component can be estimated easily without taking complex copper patterns into consideration. …

    Transactions of The Japan Institute of Electronics Packaging 10(0), E16-012-1-E16-02-10, 2017

    J-STAGE

  • Estimation of Finger Motion based on Electromechanical Sensing of Wrist Shape  [in Japanese]

    Kawaguchi Junki , Yoshimoto Shunsuke , Kuroda Yoshihiro , Oshiro Osamu

    … Unless to the traditional hand motion sensing technologies which impose the mechanical constriction to user's motion, we have developed an obtrusive hand motion sensing system focusing on the interlocked musculoskeletal structure. … The wristband device with multiple electrodes converts the finger motion to the changes of electrical contact resistance. …

    Transactions of Japanese Society for Medical and Biological Engineering 54Annual(26PM-Abstract), S114-S114, 2016

    J-STAGE

  • The Responses of Pulmonary and Systemic Circulation and Airway to Allergic Mediators in Anesthetized Rats

    Wang Mofei , Shibamoto Toshishige , Kuda Yuhichi , Tanida Mamoru , Zhang Tao , Song Jie , Mukai Kiyotaka , Kurata Yasutaka

    … Lung allergic diseases sometimes accompany pulmonary vaso- and broncho-constriction. … in rats in terms of pulmonary vascular resistance (PVR), airway pressure (AWP) and total peripheral resistance (TPR). … only two mediators, PAF and serotonin, induce airway constriction. …

    Biological and Pharmaceutical Bulletin 39(4), 556-563, 2016

    J-STAGE Ichushi Web

  • Present Status of RRAM Research  [in Japanese]

    Inoue Isao H.

    … を金属電極で挟んだだけ」のコンデンサとそっくりな構造である.トランジスタの「ゲート」に相当する3端子目が必要ないので,原理的には最も微細化可能なメモリ素子ということになる.語頭のRは電気抵抗(resistance).2端子間の抵抗が低いときが"1",高いときが"0"に相当する.この"1"と"0",つまりオン状態とオフ状態は電圧をゼロにしても保たれる.つまり不揮発メモリである.これに対してDRAMやSRAMといった現代の計算機に必須 …

    日本物理学会誌 70(11), 814-823, 2015-11

  • Effect of self-magnetic field on current flowing through true contact area  [in Japanese]

    Tamai Terutaka , Sawada Shigeru , Hattori Yasuhiro

    真の接触部は見かけの接触面に比べて非常に小さいので、そこを流れる電流は絞り込まれ集中する。これに起因する接触抵抗は集中抵抗と呼ばれている。集中抵抗は空間電位を与えるLaplaceの方程式の境界値問題として解かれてきた。しかし、電流の流れを決めるのに電位分布だけでは不十分で、電磁気学的には電流自身による磁界の発生と電流との鎖交を考慮しなければ片手落ちである。そこで、ここでは、真の円形接触面が一個の場 …

    IEICE technical report. EMD 113(438), 19-24, 2014-02-21

  • Effect of self-magnetic field on current flowing through true contact area  [in Japanese]

    Tamai Terutaka , Sawada Shigeru , Hattori Yasuhiro

    真の接触部は見かけの接触面に比べて非常に小さいので、そこを流れる電流は絞り込まれ集中する。これに起因する接触抵抗は集中抵抗と呼ばれている。集中抵抗は空間電位を与えるLaplaceの方程式の境界値問題として解かれてきた。しかし、電流の流れを決めるのに電位分布だけでは不十分で、電磁気学的には電流自身による磁界の発生と電流との鎖交を考慮しなければ片手落ちである。そこで、ここでは、真の円形接触面が一個の場 …

    IEICE technical report. Reliability 113(437), 19-24, 2014-02-21

  • Characteristics of Electric Contact Behavior in Boundary Arc Area(3)Phenomenon Just before Break Contact  [in Japanese]

    Yoshida Yoshiro

    アーク放電の発生が見られない電圧領域での接点開離時の挙動に注目した。開離直前に真実接点面積が減少し急速に集中抵抗が増加することによると推測される電圧降下が発生する。この電圧降下による総発熱量を求め、接点で生じている現象の理解を狙った。電流値の増加と共に急速に発熱していく様子が掴め、先の報告のアーク放電の発生頻度との関係について推測する。

    IEICE technical report. EMD 113(425), 7-10, 2014-01-31

  • Experimental Investigation and Numerical Simulation on the Role of Sphere Indenter in Measuring Contact Resistance of Flat Rivets

    REN Wanbin , CHEN Yu , XUE Shengjun , HORN Guenther , ZHAI Guofu

    … An automated test equipment has been described that makes it possible to measure the electrical contact resistance with high efficiency. … The relationship between contact force and contact resistance during the loading and unloading process was measured explicitly using AgPd alloy, stainless steel and sapphire substrate material with Au coatings as sphere indenters separately. …

    IEICE Transactions on Electronics E97.C(9), 873-879, 2014

    J-STAGE

  • Experimental Investigation on the Role of Sphere Indenter in Measuring Contact Resistance of Flat Rivets (Electromechanical Devices)

    REN Wanbin , CHEN Yu , XUE Shengjun , HORN Guenther , ZHAI Guofu

    … The relationship between contact force and contact resistance during loading and unloading process were measured explicitly using AgPd alloy, stainless steel and sapphire substrate material with Au coatings as sphere indenter separately. … Besides the restriction resistance, the transition zone Au coating resistance and the bulk restriction resistance of substrate are deduced from the current lines profiles. …

    IEICE technical report. EMD 113(298), 131-134, 2013-11-16

  • Visualization of electric current in contact and effect of thin film on contact resistance  [in Japanese]

    Sawada Shigeru , Tsukiji Shigeki , Shimada Shigeki , Tamai Terutaka , Hatttori Yasuhiro

    電気接点内部における電流集中の挙動については、ラプラス方程式に基づく理論式や静電場解析による結果が報告されている。しかし、実際の電流集中の様子を観察した例は少ないため、本研究では接点内の電流集中挙動を、発光ダイオード用ウエハを用いることで観察を行った。その結果から、酸化被膜が介在した接点の場合、接触面積が小さい場合は、被膜抵抗支配となり電流は接触面全面に流れ、接触面積が大きくなると、集中抵抗支配と …

    IEICE technical report. EMD 112(432), 1-6, 2013-02-15

  • Visualization of electric current in contact and effect of thin film on contact resistance  [in Japanese]

    Sawada Shigeru , Tsukiji Shigeki , Shimada Shigeki , Tamai Terutaka , Hatttori Yasuhiro

    電気接点内部における電流集中の挙動については、ラプラス方程式に基づく理論式や静電場解析による結果が報告されている。しかし、実際の電流集中の様子を観察した例は少ないため、本研究では接点内の電流集中挙動を、発光ダイオード用ウエハを用いることで観察を行った。その結果から、酸化被膜が介在した接点の場合、接触面積が小さい場合は、被膜抵抗支配となり電流は接触面全面に流れ、接触面積が大きくなると、集中抵抗支配と …

    IEICE technical report. Reliability 112(431), 1-6, 2013-02-15

  • Estimation of contact condition by nonlinear resistance  [in Japanese]

    箕輪 功

    電子情報通信学会技術研究報告 : 信学技報 112(370), 13-20, 2012-12-21

  • Estimation of contact condition by nonlinear resistance  [in Japanese]

    Minowa Isao

    はじめに 本研究は、非線形ひずみ電圧測定の立場から、非線形抵抗の発生原因を調べることで、接点の接触状態、接触情報を得ようと検討したものである。非線形ひずみのうち、奇数次(3次)は電流集中効果や障壁の存在などの本質的な要素を示し、偶数次(2次)は非線形性が接触電位差によって影響を受けるので、これらの要素を組み合わせてみると、接触抵抗だけの場合よりもさらに詳しい解析のために有効と思われる。

    IEICE technical report. EMD 112(370), 13-20, 2012-12-14

  • Experimental Equipment for Measurement of Dependence of Contact Resistance on Contact Force

    ISHIKURA Satoshi , SEKIKAWA Junya

    … Contact resistance between Ag contacts on contact load is measured by this equipment. … The measurement result is mostly in agreement with the calculated value of the constriction resistance of Ag electrical contacts. …

    IEICE technical report. EMD 112(332), 59-63, 2012-11-23

    References (6)

  • Measurement of the Constriction Resistance in Palladium Contacts Heated by a Heater

    ISHIDA Hiroyuki , KUBOTA Hiromichi

    … It was inferred that constriction resistances might decrease when electrode temperatures became high. … Constriction resistances were measured when contacts were heated by a heater in order to confirm the inference mentioned above. … As a result of measurements, constriction resistances decreased when electrode temperatures became high. … The constriction resistance had a strong relation to a quadratic function of the electrode temperature. …

    IEICE technical report. EMD 112(61), 19-22, 2012-05-18

    References (6)

  • Mechanism of Wind Fruit Drop and its Prevention by Physical Reinforcement near Fruit Stalk in Apples and Pears  [in Japanese]

    Yamamoto Takanori , Ito Masami , Harako Tatsuki

    … In the each cultivar examined, the fruit detachment resistance force perpendicular to the fruit stalk shaft was remarkably smaller than that parallel. …

    Bulletin of the Yamagata University. Agricultural science 16(3), 133-143, 2012-02

    JASI

  • Current Density Analysis in Contact Area by Using Light Emission Diode Wafer

    SAWADA Shigeru , TSUKIJI Shigeki , TAMAI Terutaka , HATTORI Yasuhiro

    … In order to clarify the theory of contact resistance, there are many reports in these years. … Mathematically the constriction current is derived from Laplace equation at one contact which shape is circle, ellipse, triangle and square. … And numerical approach for constriction current analysis was also preformed by Minowa and Sawada. …

    IEICE technical report. EMD 111(299), 115-119, 2011-11-10

    References (9)

  • New Molecular Mechanisms for Cardiovascular Disease : Contribution of Endothelium-Derived Hyperpolarizing Factor in the Regulation of Vasoconstriction in Peripheral Resistance Arteries

    JIN Xin , SATOH OTONASHI Yukiko , ZAMAMI Yoshito , TAKATORI Shingo , HASHIKAWA HOBARA Narumi , KITAMURA Yoshihisa , KAWASAKI Hiromu

    … The mesenteric vascular bed produces vascular resistance to develop blood pressure and regulate tissue blood flow that plays an important role in maintenance of systemic blood pressure. … There is now strong evidence that in these small resistance arteries, EDHF plays a major role in the response to vasoactive substances and regulation of vascular tone. …

    Journal of Pharmacological Sciences 116(4), 332-336, 2011-08-20

    J-STAGE Ichushi Web References (40) Cited by (3)

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