Hiroyuki Fujisawa

Tohoku Bunka Gakuen University

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Yoshiyuki Yonezawa

National Institute of Advanced Industrial Science and Technology

Kenichi Murakami

Nippon Steel (Japan)

Hajime Okumura

University of Tsukuba

Kensuke Takenaka

National Institute of Advanced Industrial Science and Technology

Kenji Fukuda

Fukuda Denshi (Japan)

Hiroto Suzuki

Tokyo City University

Manabu Takei

National Institute of Advanced Industrial Science and Technology

Shingo Kawakami

Tohoku Bunka Gakuen University

Tomohisa Kato

National Institute of Advanced Industrial Science and Technology

Mitsuo Okamoto

National Institute of Advanced Industrial Science and Technology

Cooperative Institutions

National Institute of Advanced Industrial Science and Technology

Osaka University

Fuji Electric (Japan)

Tohoku Bunka Gakuen University

The University of Tokyo

Kyoto University

Tohoku University

University of Tsukuba

Advanced Science Research Center

Hokkaido University

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Lower Limb Muscle Activities and Cardiopulmonary Function during Treadmill Walking with Partial Body Weight Support

Rigakuryoho Kagaku (2011)

Kazuki Takahashi Yoichiro Sato Makoto Suzuki Kenichi Murakami Jun Onobe

〔目的〕本研究の目的は，体重免荷トレッドミル歩行（BWS歩行）の下肢筋活動および呼吸循環応答を検討することとした。〔対象〕健常成人男性18名（平均年齢20.4±1.7歳）を対象とした。〔方法〕全荷重（FWB）歩行，25％BWS歩行，50％BWS歩行の3条件をランダムにて実施した。筋活動として1歩行周期の積分筋電量と筋活動パターンについて観察した。また呼吸循環応答として酸素摂取量を中心に測定した。〔結果〕筋活動パターンは各条件間で大きな変化は見られなかったが，積分筋電量は免荷量が増加するに従い減少した。また，酸素摂取量は25％BWS歩行にて約10％，50％BWS歩行にて約18％減少した。〔結語〕BWS歩行は筋活動パターンを変えず，同時にエネルギー消費量が抑えられた介入であることが示唆された。

Treadmill

10.1589/rika.26.83

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Citations (4)

Influence of Prestorage Conditioning Treatment and Optimal Temperature and Humidity for Prolonged Storage of 'Kiyomi' Tangor.

Journal of the Japanese Society for Horticultural Science (2001)

Hiroyuki Fujisawa Toshio Takahara Tatsushi Ogata

'Kiyomi' tangor (Citrus unshiu Marc. x C. sinensis Osb.) fruit held at ambient temperature and humidity for one to two weeks (prestorage conditioning) prior to storing them at various cold temperatures and humidities were compared with fruit stored directly without prestorage treatment to seek means of preventing rind injury. The conditioning treatment increased the occurrence of rind injury as brown spotting, while symptoms of chilling injury appeared as pitting on fruit stored at 1°C. Rind injury occurred early during storage at 12°C, whereas it developed slowly at 5-6°C, especially under high relative humidity (RH). 'Kiyomi' fruit, stored at 6°C and >98% RH without prestorage conditioning, remained sound with little or no rind injury for 5 months after harvest.

10.2503/jjshs.70.719

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Citations (10)

Frequency analysis of the center of pressure in tandem stance by community-dwelling elderly women

理学療法学Supplement Vol.42 Suppl. No.2 (第50回日本理学療法学術大会抄録集) (2015)

Makoto Suzuki Hiroto Suzuki Shingo Kawakami Naoki Tanaka Chie Miki

Center (category theory)

10.14900/cjpt.2014.1644

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Structural Properties of CuInSe2 Thin Films for High Efficiency Solar Cells

Springer eBooks (1991)

Hiroyuki Fujisawa T. Ihara Hidenori Sato T. Hama M. Ohsawa

10.1007/978-94-011-3622-8_231

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Citations (1)

A PORTABLE NON-DESTRUCTIVE QUALITY METER FOR UNDERSTANDING FRUIT SOLUBLE SOLIDS IN APPLE CANOPIES

Acta Horticulturae (2007)

Hideo Bessho Kazuki Kudo Jun Omori Yuji Inomata Misao Wada

10.17660/actahortic.2007.732.88

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Citations (8)

Suppression of Leakage Current Increase of 4H-SiC Schottky Barrier Diodes during High-Temperature Annealing by "Face-to-Face" Arrangement

Materials science forum (2003)

Syunsuke Izumi Hiroyuki Fujisawa Takeshi Tawara Katsunori Ueno Mutsuhisa Hiraoka

10.4028/www.scientific.net/msf.433-436.685

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Static and dynamic performance evaluation of > 13 kV SiC p-channel IGBTs at high temperatures

Tadayoshi Deguchi Tomonori Mizushima Hiroyuki Fujisawa Kensuke Takenaka Yoshiyuki Yonezawa

To examine the effect of the device structure on the on-state voltage (V on ), several types of ultrahigh-voltage 4H-SiC p-channel insulated-gate bipolar transistors (IGBTs) were fabricated. A p-channel IGBT with a retrograde charge storage layer (CSL) and an additional JFET ion implantation region exhibited the lowest V on at 200 °C. To obtain a blocking voltage (BV) greater than 13 kV, a junction termination extension (JTE)-dose dependence of the BV was also investigated. Furthermore, ampere-class p-channel IGBTs with optimized device structures were fabricated for the evaluation of the switching loss (5 kV/1 A). Although the turn-off loss increased with an increase in the temperature, the loss remained as low as less than 10 mJ up to 250 °C. This performance renders the ultrahigh-voltage 4H-SiC p-channel IGBTs suitable for high-temperature and high-power applications.

JFET

Insulated-gate bipolar transistor

High Voltage

10.1109/ispsd.2014.6856026

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Citations (10)

EFFECTS OF LONG-DISTANCE RUNNING AND EXERCISE WITH A BICYCLE ERGOMETER ON THE ERYTHROCYTE ANTIOXIDATIVE DEFENSE SYSTEM

Japanese Journal of Physical Fitness and Sports Medicine (1994)

Yoshinori Ohtsuka Noriyuki Yabunaka Hiroyuki Fujisawa Hironobu Kamimura Yuko Agishi

The erythrocyte antioxidative defense system was investigated before and after a 12km run. The effect of exercise with a bicycle ergometer on this system was also examined one and seven days after the. 12km run. Five untrained healthy men, aged 18-21 years, participated in the present study. Plasma creatine kinase (CK) activity increased after running and reached a maximum on the next day (p<0.005) . Levels of the reduced form of glutathione (GSH) decreased by 24.6% after running (p<0.005), but by 7 days later the values recovered. Levels of lipid peroxides (LPO, expressed as thiobarbituric acid-reactive substances) fell slightly after running (13.4%, not significant), then showed a significant decrease on the next day (34.7%, p<0.005) and recovered by the seventh day. Neither glutathione peroxidase (GPX) nor glutathione reductase (GR) activities (with or without FAD) showed significant changes after the 12km run. Activities of catalase (CAT) were lowest after the exercise with a bicycle ergometer on the following day (p<0.05 vs. initial levels) . Levels of GSH, GPX, GR and LPO did not change after this exercise. The decreased level of GSH after the 12km run indicates the presence of oxidative stress, while moderate exercise with a bicycle ergometer does not affect the erythrocyte glutathione metabolism in untrained men. It is also suggested that catalase activity decreases after the repeated exercise.

Bicycle ergometer

Glutathione reductase

Thiobarbituric acid

Cycle ergometer

Physical exercise

Creatine kinase

10.7600/jspfsm1949.43.277

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Citations (0)

Shoulder Girdle Flexion Force and Muscle Activities of Different Shoulder Positions

Rigakuryoho Kagaku (2015)

Naoki Tanaka Toru Nishiyama Hiroto Suzuki Shingo Kawakami Hiroyuki Fujisawa

〔目的〕肩関節肢位の違いによる肩甲帯屈曲筋力および肩甲骨周囲筋の筋活動を明らかにすること．〔対象〕肩関節疾患の既往がない若年健常成人男性30名．〔方法〕肩甲帯屈曲筋力測定台を作製し，肩関節下垂位と肩関節90°屈曲位における最大肩甲帯屈曲筋力を測定した．測定直前に肩甲棘上縁角度を測定し，筋力測定時に肩甲骨周囲筋の筋活動を測定した．〔結果〕最大筋力は下垂位に比べ屈曲位で有意に高値を示し，筋活動は下垂位に比べ前鋸筋下部繊維のみ屈曲位で高値を示した．〔結語〕前鋸筋の形態や肩甲骨の角度を踏まえ，肩関節肢位を変えて筋力測定や筋力強化を行う必要性が示唆された．

Shoulder girdle

10.1589/rika.30.453

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Citations (1)

Efficient Synthesis of Selenocarbonyl Compounds by Treating Carbonyl Compounds with Bis(1,5-cyclooctanediylboryl) Selenide

Bulletin of the Chemical Society of Japan (1997)

Kazuaki Shimada Norikazu Jin Michiko Kawaguchi Kumiko Dobashi Yumi Nagano

Abstract Selenoaldehydes and selenoketones were generated in situ, by treating aldehydes or ketones, respectively, with bis(1,5-cyclooctanediylboryl) selenide; the resulting selenocarbonyl compounds were trapped with 2,3-dimethyl-1,3-butadiene to give the corresponding [4+2] cycloadducts. The treatment of amides, an ester, and ketones possessing bulky substituents with the reagent also afforded the corresponding selenoamides, a selenoester, and sterically protected selones, respectively, in modest yields. On the other hand, a similar treatment of cinnamaldehyde with the reagent gave the 2,3-dihydroselenophene derivative, which originated from a [4+2]-type self-dimerization of in situ generated 3-phenyl-2-propeneselenal.

Selenide

10.1246/bcsj.70.197

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Citations (35)