Search Results 1-20 of 7995

  • Recovery of p-GaN surface damage induced by dry etching for the formation of p-type Ohmic contact

    He Junlei , Zhong Yaozong , Zhou Yu , Guo Xiaolu , Huang Yingnan , Liu Jianxun , Feng Meixin , Sun Qian , Ikeda Masao , Yang Hui

    … P-type Ohmic contact on the dry-etched p-GaN surface is highly desired for various device applications with the p-GaN buried underneath by an epitaxial layer or a dielectric layer. … However, GaN dry etching process usually induces surface damage and inevitably degrades the p-type Ohmic contact performance. …

    Appl. Phys. Express 12(5), 055507, 2019-04-10

    JSAP DOI

  • Influence of current and magnetic flux density on magnetic blow-out : on arc discharge at breaking of electrical contacts  [in Japanese]

    眞野 健太 , 澤 孝一郎 , 吉田 清

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(462), 53-57, 2019-03-01

  • SHAPE AND TOPOLOGY OPTIMIZATION OF LATTICED SHEAR WALL UTILISING CONTACT TO EXISTING FRAME  [in Japanese]

    KIMURA Toshiaki , OHSAKI Makoto , YAMAOKA Yuki

    …  Among various methods for seismic retrofit, installation of shear wall composed of light weight blocks to existing frame is an effective approach in view of reduction of construction cost because they can resist compression (contact to wall) only and complex anchoring and/or welding is not necessary. … In each phase, an optimization problem is formulated to maximize the lateral reaction force for specified inter-story drift angle. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (757), 385-391, 2019-03

    J-STAGE AIJ

  • RIGIDITY EVALUATION OF PRE-STRESSED RUBBER BEARINGS FOR LONG SPAN ROOFS  [in Japanese]

    MORITA Akira , HONMA Keiichi , WATANABE Yasuhiro , NAKAMURA Misaki , YAMASHITA Tetsuo

    … A friction chemical coating was used to transmit shear stress between the base and rubber plates and between the rubber plate and base mortar.<br> In the R29-s-d test, the rubber was inserted but the anchor-bolt hole was not loose so that the anchor bolts were directly subjected to the horizontal force. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (757), 393-402, 2019-03

    J-STAGE AIJ

  • MECHANICAL CHARACTERISTICS AND ESTIMATION METHOD OF BENDING STRENGTH OF EMBEDDED CONNECTION FOR LIGHT-WEIGHT STEEL SQUARE TUBE  [in Japanese]

    ITO Takumi , NAKAIE Yuta , YAGI Itsuki , MORI Kenjiro , CHOI Chang Hoon

    … So this study investigates its resistant mechanism and restoring force characteristics subjected to bending. … Furthermore, the test specimen with the longer connector presents the small slip and pinching behavior during cyclic loading.<br> According to the ultimate state 2), it is predicted that the contact force is generated at the embedded parts. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (756), 279-289, 2019-02

    J-STAGE AIJ

  • Change of sound pressure in the ear canal by contact force of bone-conducted transducer  [in Japanese]

    小木曽 里樹 , 水谷 孝一 , 若槻 尚斗 , 善甫 啓一 , 前田 祐佳

    音楽音響研究会資料 37(8), 11-14, 2019-01-26

  • Evaluation of protein adsorption to diamond-like carbon (DLC) and fluorinedoped DLC films using the quartz crystal microbalance method

    ISHIGE Haruka , AKAIKE Shun , HAYAKAWA Tohru , HIRATSUKA Masanori , NAKAMURA Yoshiki

    … Each sensor was characterized using atomic force microscopy, surface roughness and surface wettability measurements and surface free energy calculations. …

    Dental Materials Journal 38(3), 424-429, 2019

    J-STAGE

  • Measurement by Tactile Sensor and FEM Analysis of Multi-layered Flexible Model for Skin Diagnosis  [in Japanese]

    Kido Jun , Abe Yuta , Sato Shuhei , Abe Takashi , Noma Haruo , Sohgawa Masayuki

    … In the multi-axial-force MEMS sensor, we evaluated the change of output by contact with the multi-layered flexible object. … The sensor output depends greatly on the ratio and hardness of the hard layer and the thickness of the flexible layer of the specimen, and the contact surface. …

    IEEJ Transactions on Sensors and Micromachines 139(6), 149-154, 2019

    J-STAGE

  • A Study on Mitigating Mechanism of Brain Injury by Using Bicycle Helmets in A-pillar Impacts  [in Japanese]

    Ito Daisuke , Noba Yusuke , Mizuno Koji

    Aピラー衝突時の自転車用ヘルメットによる脳傷害軽減メカニズムについて有限要素解析により検討した.ヘルメットを着用した人体モデルを自転車に着座させ,車両と衝突させたところ,多くの場合でヘルメットにより脳ひずみが軽減したが,脳傷害発生リスクが軽減されない場合もあった.その原因を力学的観点から分析した.

    Transactions of Society of Automotive Engineers of Japan 50(3), 838-843, 2019

    J-STAGE

  • Robustness Improvement of Thermosonic Flip Chip Bonding to Device Chip Tilt  [in Japanese]

    TOMIOKA Taizo , IGUCHI Tomohiro , SHOHJI Ikuo

    … We found that die-shear force and the sum of the contact area between bumps and the top chip electrodes were constant in spite of tilting of the bottom chip. … Although the contact area between each bump and top chip electrode depended on different bonding forces generated by bottom chip tilting, the fractional area of Au-Al alloy of each bonding area became nearly equal. …

    Journal of the Japan Society for Technology of Plasticity 60(700), 142-146, 2019

    J-STAGE

  • Position and force control of a robot by means of round-belt twist-actuation generating contraction forces  [in Japanese]

    INOUE Takahiro , MIYATA Ryuichi

    … Especially, this paper shows position and force control by means of the proposed twisted round-belt actuators with traditional P/PI controllers. … We clearly demonstrate that contact force on tip of the robot is able to follow desired sinusoidal trajectory with no errors by means of straightforward algorithm on the basis of voltage-controlled robot hardware. …

    Transactions of the JSME (in Japanese), 2019

    J-STAGE

  • A Non-Contact Holder Using Airflow

    MORISAWA Takuya , YANO Yojiro , TSUKIJI Tetsuhiro , SUZUKI Roichiro

    … <p>When products requiring careful handling such as semiconductor wafers and food (hereinafter called "workpieces") are transported in manufacturing processes, problems can occur due to malfunctions that degrade sanitary conditions during the transport of workpieces through contact. … An excellent device for transporting workpieces is a pneumatic non-contact holder (hereinafter called "holder"). …

    JFPS International Journal of Fluid Power System 11(3), 104-109, 2019

    J-STAGE

  • Experimental analysis of the fall mitigation motion caused by tripping based on the motion observation until shortly before ground contact

    AKIYAMA Yasuhiro , MITSUOKA Kento , OKAMOTO Shogo , YAMADA Yoji

    … In this study, the subject's reaction motion and fall process against tripping became clearer because the fall motion, which included the phase closer to the ground contact, could be recorded for a longer time than that in most previous studies. … Among such trials, the larger forward inclination of the body, the excessive forward movement of the center of mass from the support point, and the smaller ground reaction force of the recovery foot in the normal direction was observed. …

    Journal of Biomechanical Science and Engineering 14(1), 18-00510-18-00510, 2019

    J-STAGE

  • Development of Ball Screw having Asymmetric Thread Groove Form:(1st Report, Experimental Production of Ball Screw and Evaluation of Axial Rigidity)  [in Japanese]

    NOGUCHI Shoji , RI Shunichi , TOKUMURA Hiroki , NAKAMURA Futoshi , HAMADA Yoshihiro , TAKAHASHI Tohru

    … A ball screw is inept to power transmission due to strengthening the contact surface pressure between the ball and the thread groove. … Restricting the intended purpose to injection molding machine, a large force should be loaded to the mold clamping direction, but any axial force is not required in return. … There is an angular ball bearing or a buttress thread as mechanical components with which a large unidirectional force can be applied. …

    JOURNAL OF JAPAN SOCIETY FOR DESIGN ENGINEERING 54(5), 299-308, 2019

    J-STAGE

  • Development of Innovative Intelligent Machine Tool Based on CAM-CNC Integration Concept – Adaptive Control Based on Predicted Cutting Force

    Nishida Isamu , Tsuyama Ryo , Shirase Keiichi , Onishi Masahiro , Koarashi Katsuyuki

    … In this system, the cutting-force simulation is performed simultaneously with the real-time tool path generation. … Then, the tool feed rate can be controlled according to the predicted cutting force. … The instantaneous cutting force model predicts the cutting force. … Thus, it is possible to predict the cutting force in the case of non-uniform contact between the tool and the work material. …

    International Journal of Automation Technology 13(3), 373-381, 2019

    J-STAGE

  • Modeling Approach for Estimation of Contact and Friction Behavior of Rolling Elements in Linear Bearings

    Reuss Matthias , Sakai Taku , Matsubara Atsushi

    contact is observed between the ball and raceway in linear bearings. … Based on the Hertzian contact theory and a tangential force model, a model is developed for the friction behavior during the contact between the ball and raceway. … This model determines the stick and slip areas, and the relative velocity at the contact surface. …

    International Journal of Automation Technology 13(3), 382-388, 2019

    J-STAGE

  • Effect of Magnetic Field from Horizontal Direction on Magnetically Levitated Steel Plate:(Experimental Consideration of Applied Position of Tension)

    Ito Y. , Oda Y. , Narita T. , Kato H.

    … As a solution to this, non-contact transport of steel plates electromagnetic force has been proposed. …

    Transaction of the Magnetics Society of Japan Special Issues 3(1), 95-100, 2019

    J-STAGE

  • Disturbance Modeling based on Fourier Series for Precise Reaction Force Estimation in Semicircular Linear Motor

    Asai Hiroshi , Shimono Tomoyuki , Mizoguchi Takahiro

    … To control the contact force in a CSM system, an observer is implemented to estimate the reaction force instead of using a force sensor. … However, the estimated reaction force includes an estimation error caused by forces other than the reaction force. … To validate the effectiveness of the proposed method, a force control test is performed with the proposed disturbance model on a CSM. …

    IEEJ Journal of Industry Applications 8(3), 512-521, 2019

    J-STAGE

  • Arc Discharge during Commutation Process in DC Motor Immersed in Ethanol: Approach to Contact State of Brush on Commutator Segment  [in Japanese]

    Fukutsuka Takashi , Yokomizu Yasunobu , Asai Hiromitsu , Nozu Takahiro

    … Subsequently these results were discussed on the basis of contact resistance just before brush-commutator separation. … As a result, the contact resistance was found to be 0.6 times lower in the ethanol than in the gasoline. … A novel approach was lastly made to the contact state of the brush on the commutator in view of mechanical properties: coefficient of friction, lubrication, contact load. …

    IEEJ Transactions on Power and Energy 139(5), 293-301, 2019

    J-STAGE

  • An analysis method for system with rigid and extremely flexible components by the use of the analogy with contact problem of rigid bodies  [in Japanese]

    SUGAWARA Yoshiki , OOSHIMA Shuntaro , CHIDA Taku

    … In general, flexible component of such a system has two states, one is the state with tensional force and the other is without tensional force. … Authors have found analogy between the state transition of the SREF and contact problem described by linear complementary problem which was developed by Pfeiffer et al., thus similar procedure can be employed for the analysis of the motion of SREF. …

    Transactions of the JSME (in Japanese) 85(872), 18-00384-18-00384, 2019

    J-STAGE

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