Search Results:  1-20 of 3186

  • 1

    Curie temperature and high temperature behavior of Pb(Zr,Ti)O

    Fujimoto Shota , Namihira Takao , Iwata Kazuki , Kobayashi Makiko

    … The Curie temperature of Pb(Zr,Ti)O<inf>3</inf>/Pb(Zr,Ti)O<inf>3</inf>(PZT/PZT) sol–gel composites was investigated empirically in order to determine the maximum operation temperature of PZT/PZT ultrasonic transducers. …

    Jpn. J. Appl. Phys. 54(7S1), 07HB04, 2015-06-17


  • 2

    Room-temperature continuous-wave operation of GaN-based vertical-cavity surface-emitting lasers fabricated using epitaxial lateral overgrowth

    Izumi Shouichiro , Fuutagawa Noriyuki , Hamaguchi Tatsushi , Murayama Masahiro , Kuramoto Masaru , Narui Hironobu

    … We have successfully demonstrated the room-temperature continuous-wave operation of GaN-based vertical-cavity surface-emitting lasers (VCSELs) with all-dielectric reflectors, which were fabricated using epitaxial lateral overgrowth. … The maximum output power was 0.9 mW for an 8-µm-diameter current aperture, which was made possible because of the high thermal conductivity of the GaN substrate. …

    Appl. Phys. Express 8(6), 062702, 2015-05-21


  • 3

    Chain packing and its anomalous effect on mechanical toughness for poly(lactic acid)

    Huang Tong , Miura Motohiro , Nobukawa Shogo , Yamaguchi Masayuki

    … It is found that the samples cooled in the temperature range from 60 to 80 oC, i.e., slightly higher than the glass transition temperature T_g, show ductile behavior with a low brittle-ductile transition temperature. … Furthermore, the sample obtained by prolonged cooling at 56 oC also shows ductile behavior, whereas a shorter cooling time at the same temperature leads to brittle fracture. …

    Biomacromolecules 16(5), 1660-1666, 2015-04-15

    IR CrossRef

  • 4

    High-frequency level-up shifter based on 0.18 µm vertical metal–oxide–semiconductor field-effect transistors with 70% reduction of overshoot voltage above power supply voltage

    Tanoi Satoru , Endoh Tetsuo

    … A high-frequency and high-voltage-tolerant level-up shifter is proposed. … It realizes a typical operation frequency of 164 MHz when the maximum voltage applied to all MOSFETs is limited to 1.8 V. … The maximum achievable operation frequency is more than 1.6 times that of a conventional circuit. …

    Jpn. J. Appl. Phys. 54(4S), 04DE03, 2015-03-12


  • 5

    Thermal properties of lateral-current-injection semiconductor membrane Fabry–Perot laser under continuous-wave operation

    Hiratani Takuo , Doi Kyohei , Lee Jieun , Inoue Daisuke , Amemiya Tomohiro , Nishiyama Nobuhiko , Arai Shigehisa

    … For the realization of on-chip optical interconnects, light sources enabling ultralow power consumption and high-efficiency operation are required. … With this aim, we fabricated lateral-current-injection-type membrane Fabry–Perot lasers with a threshold current of 3.5 mA and an external differential quantum efficiency of 11% under a room temperature-continuous wave (RT-CW) condition. …

    Jpn. J. Appl. Phys. 54(4), 042701, 2015-03-06


  • 6

    A high-temperature in situ cell with a large solid angle for fluorescence X-ray absorption fine structure measurement

    Murata Naoyoshi , Kobayashi Makoto , Okada Yukari , Suzuki Takuya , Nitani Hiroaki , Niwa Yasuhiro , Abe Hitoshi , Wada Takahiro , Mukai Shingo , Uehara Hiromitsu , Ariga Hiroko , Takakusagi Satoru , Asakura Kiyotaka

    … We present the design and performance of a high-temperature in situ cell with a large solid angle for fluorescence X-ray absorption fine structure (XAFS) spectra. … We measured a Pt-SnO2 thin layer on a Si substrate at reaction conditions having a high activity. … In situ measurement enables the analysis of the difference XAFS spectra between before and during the reaction to reveal the structure change during the operation. …

    Review of scientific instruments 86(3), 034102-1-034102-6, 2015-03

    IR CrossRef

  • 7

    Channel shape and interpoly dielectric material effects on electrical characteristics of floating-gate-type three-dimensional fin channel flash memories

    Liu Yongxun , Nabatame Toshihide , Nguyen Num , Matsukawa Takashi , Endo Kazuhiko , O’uchi Shinichi , Tsukada Junichi , Yamauchi Hiromi , Ishikawa Yuki , Mizubayashi Wataru , Morita Yukinori , Migita Shinji , Ota Hiroyuki , Chikyow Toyohiro , Masahara Meishoku

    … The electrical characteristics of the fabricated FG-type 3D fin channel flash memories including threshold voltage (V<inf>t</inf>) variability, program/erase (P/E) speed, memory window, endurance, and data retention at room temperature and 85 °C have been comparatively investigated. …

    Jpn. J. Appl. Phys. 54(4S), 04DD04, 2015-02-26


  • 8

    250 °C-Operated sandwich-structured all-SiC power module

    Kato Fumiki , Simanjorang Rejeki , Lang Fengqun , Nakagawa Hiroshi , Yamaguchi Hiroshi , Sato Hiroshi

    … The operation of a sandwich structured all-SiC power module is demonstrated at 250 °C. … A double pulse test at a high temperature is carried out. …

    Jpn. J. Appl. Phys. 54(4S), 04DP06, 2015-01-29


  • 9

    P-21 Study of low-temperature gasfication for woody biomass tar using Limonite  [in Japanese]

    SAKAI Yumi , YAMAUCHI Masamitsu , SHIMIZU Tadaaki , KIM Heejoon , LI Liuyun

    … Limonite is a cheap, natural mineral, which is reported to have high tar resolution performance. … Basing on this, the low temperature operation for tar reforming could contribute to improvement of cold gas efficiency and the cost reduction. … As results, limonite improved the biomass tar gasification, and the gas yields increased notably with the temperature increasing. …

    バイオマス科学会議発表論文集 (10), 89-90, 2015-01-08

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  • 10

    Comparisons on Arc Behavior and Contact Performance between Cu and Cu-Mo Alloys in a Bridge-Type Contact System

    ZHOU Xue , CHEN Mo , ZHAI Guofu

    … Cu-Mo alloy carries forward not only high electrical conductivity and high thermal conductivity from Cu but also high hardness from Mo, which makes it a promising potential application in electrical contact fields. … In this paper, arc characteristic and erosion characteristic of Cu-Mo contacts are studied with a bridge-type contact high speed break mechanism on DC270 V/200 A load condition. …

    IEICE Trans. Electron. E98.C(9), 904-911, 2015

    J-STAGE CrossRef

  • 11

    Plant system and required water pool capacity for large scale BWRs with inherently safe technologies

    KITOU Kazuaki , ISHIDA Naoyuki , TAMURA Akinori , ISHIBASHI Ryou , KANADA Masaki , KAMOSHIDA Mamoru

    … We have been developing the following various safe technologies: a passive water-cooling system, an infinite-time air-cooling system, a hydrogen explosion prevention system, and an operation support system to better deal with reactor accidents. … Both these cooling systems remove relatively high decay heat for the initial 10 days after an accident, and then the infinite-time air-cooling system is used alone to remove attenuated decay heat. …

    Mechanical Engineering Journal advpub(0), 2015

    J-STAGE CrossRef

  • 12

    Operation Windows of the Oxygen Blast Furnace with Top Gas Recycling

    Helle Mikko , Saxén Henrik

    … The results shed light on the feasible operation window, under the given process constraints, for the oxygen blast furnace and also how different combinations of hearth and shaft gas injections are reflected in coke rate, oxygen rate and top gas composition, as well as in the emissions. …

    Transactions of the Iron and Steel Institute of Japan advpub(0), 2015

    J-STAGE CrossRef

  • 13

    Estimating the threshold amount of adductor muscle arginine phosphate content required for recovery of vitality in the scallop Mizuhopecten yessoensis  [in Japanese]


    著者らは,これまでにホタテガイに環境ストレスを負荷させたときのへい死に至る活力低下は,閉殻筋のアルギニンリン酸量により予測可能なことを示した。本研究では,養殖の現場で活用可能なアルギニンリン酸量の評価基準を設定するため,ストレス負荷によりアルギニンリン酸量が減少した貝を正常な飼育環境に戻して,回復とへい死の境界となる残存値の推定を試みた。その結果,アルギニンリン酸量が概ね 5 μmol/g 以下に …

    NSUGAF 81(4), 694-700, 2015

    J-STAGE CrossRef

  • 14

    Shaft Furnace Simulation by Mathematical Model Considering Coke Gasification Rate in High Temperature  [in Japanese]

    Iwai Yuki , Ishiwata Natsuo , Murai Ryota , Matsuno Hidetoshi

    … In a shaft furnace, coke gasification reactions by CO2 and H2O are occurred in high temperature and they have great effects on coke rate in shaft furnace because they are strong endothermic reactions. … So prediction of shaft furnace operation needs accurate gasification rates. …

    Tetsu-to-Hagane 101(8), 416-421, 2015

    J-STAGE CrossRef

  • 15

    An experimental study on synthesis of β-Sialon composites using fly ash and lignite char–preparation and whiskers formation  [in Japanese]

    ZHAO Huan , WANG Pingyang , YU Jianglong , ZHANG Jing , TAHMASEBI Arash , MENG Fanrui

    … β-Sialon based composites were produced using a vertical reactor by carbothermal reduction reaction under nitrogen using fly ash and lignite chars to examine the effects of mixing, carbon content, reaction temperature and sintering time. … When excess carbon was increased to 100%, a higher combustion reactivity of low-temperature chars resulted in the production of SiC phase. …

    Journal of the Ceramic Society of Japan 123(1439), 542-549, 2015

    J-STAGE CrossRef

  • 16

    Cyclic Deformation Characteristics of Carbon Steel Pipe with Local Thin Area:- Effect of Internal Pressure -  [in Japanese]

    ZHOU Runze , KOJIMA Ikuo , SUZUKI Ryuta , TSUJI Hirokazu

    … Fitness-For-Service (FFS) assessment is a quantitative engineering approach that is used to determine the equipment with a flaw or damage is fit to continue operation. … The authors calculated up to 100 cycles on carbon steel pipe which contained a Local Thin Area against seismic load and internal pressure at room temperature. …

    Journal of Japan High Pressure Institute 53(3), 112-119, 2015

    J-STAGE CrossRef

  • 17

    Thermal Effects on Lifetime Evaluation of Adhesiveless Copper–Polyimide

    Huang Kuo-Hua , Duh Jeng-Gong

    … Adhesiveless materials are commonly used for electric or portable products that require high flexibility during operation. … The temperature and relative humidity (RH) are the major parameters for the test, and the test conditions of 85°C/85% RH and 150°C will be discussed in this paper. …

    Materials Transactions, JIM 56(7), 1063-1066, 2015

    J-STAGE CrossRef

  • 18

    Analytical Method for Prediction of Suction Performance of Ejector-Jet

    TANI Kouichiro , HASEGAWA Susumu , UEDA Shuichi , KANDA Takeshi , NAGATA Harunori

    … The Japan Aerospace Exploration Agency is proposing a rocket-based combined cycle engine for operation under various condition, an ejector-jet mode being adopted for the low-speed regime. … The suction performance ejector-jets has long been studied experimentally and numerically at JAXA, and little success has been achieved in explaining the deterioration of suction performance with high-temperature gas or light gas such as helium. …


    J-STAGE CrossRef

  • 19

    Low Carbon Operation of Super-Large Blast Furnaces in China

    Liu Zheng-jian , Zhang Jian-liang , Yang Tian-jun

    … There are 19 super-large blast furnaces more than 4000 m3 running in China currently, and significant progresses of low carbon operation were obtained in recent years. … In this paper, low carbon operation technologies of Chinese super-large blast furnaces were illustrated in the two aspects of raw materials preparation and blast furnace operation. …

    Transactions of the Iron and Steel Institute of Japan 55(6), 1146-1156, 2015

    J-STAGE CrossRef

  • 20

    Effect of the Reduction of Calcium Ferrite on Disintegration Behavior of Sinter under High Hydrogen Atmosphere

    Murakami Taichi , Kodaira Takeyuki , Kasai Eiki

    … In order to maintain stable operation of the blast furnace under a high H2 concentration, it is necessary to understand the effects of H2 and H2O gases on the disintegration of the iron ore sinter by reduction under various conditions. … However, longer reduction time is necessary for acicular calcium ferrite as 5.4 ks by CO reduction and 3.6 ks for CO–H2 reduction, while columnar calcium ferrite is not reduced at such temperature. …

    Transactions of the Iron and Steel Institute of Japan 55(6), 1197-1205, 2015

    J-STAGE CrossRef

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