Search Results:  1-20 of 3198

  • 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

    JSAP

  • 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

    JSAP

  • 3

    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

    JSAP

  • 4

    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

    JSAP

  • 5

    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

  • 6

    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

    JSAP

  • 7

    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

    JSAP

  • 8

    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

    CrossRef

  • 9

    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

    CrossRef

  • 10

    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

    CrossRef

  • 11

    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. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 58(4), 228-236, 2015

    CrossRef

  • 12

    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

    CrossRef

  • 13

    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

    CrossRef

  • 14

    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 advpub(0), 2015

    CrossRef

  • 15

    Field Experiment on Forced Water Circulation by Multifunctional Aerator in a Dam Reservoir:- Visualization of Thermocline Destruction Process and Flow Structure in Shallow Layer -  [in Japanese]

    NAKATA Akinori , IWAMATSU Yuji , SUYAMA Fumiaki , YAMAGISHI Masataka , HOSOKI Yusaku

    京都府内の日吉ダムでは、貯水池深層への酸素供給と浅層の水温躍層解消のため、複合型の曝気循環装置が導入され、2011年8月、その装置による水温躍層の解消効果を確認する実地調査実験が実施された。実験では、曝気循環装置の近傍で、水温と流れの分布が高い空間・時間分解能で直接計測され、さらに、ビデオカメラによって深層から連行される濁水の映像が撮影された。これらのデータを分析することによって、浅層の水温躍層が …

    Transactions of the Visualization Society of Japan 35(5), 7-15, 2015

    CrossRef

  • 16

    Removal of iron oxide powder scale from Low Pressure Heater Drainage  [in Japanese]

    Asada H. , Iwasaki M. , Kuraya T. , Ichinohe M. , Kiriu M.

    CWTによる給水処理を採用している国内石炭火力発電プラントにおいて,ボイラ蒸発管へのパウダー状スケール(ヘマタイトスケール)付着による蒸発管の熱損傷事例が報告されている。そこで,ボイラ給水の鉄濃度低減を目的として,特異的に鉄濃度の高い低圧ヒータドレンを対象に140℃まで使用可能な高温ドレンフィルタによる除鉄性能を評価した。その結果,次のことが明らかとなった。発電ユニット起動時において,低圧ドレンヒ …

    THE THERMAL AND NUCLEAR POWER GENERATION CONVENTION COLLECTED WORKS 11(0), 57-62, 2015

    CrossRef

  • 17

    A Case of Postoperative Fulminant Malignant Hyperthermia after Pediatric Cardiac Surgery  [in Japanese]

    Chikada Masahide , Ono Hirokuni , Miyairi Takeshi , Suzuki Hirotoshi , Sagane Masanori , Kita Syouta , Tsuzuki Yosimitsu , Aso Kentaro

    悪性高熱症は,揮発性吸入麻酔薬や脱分極性筋弛緩薬が誘因と考えられ,周術期における致命的合併症の一つとされている.我々は,最近小児開心術症例で術後劇症悪性高熱症を経験したので,文献的考察をふまえて報告する.症例は11ヶ月男児,診断は心室中隔欠損症,Down症候群である.生後21日,肺動脈絞扼術と動脈管結紮術を施行した.今回根治術として,心室中隔欠損パッチ閉鎖と肺動脈絞扼解除を施行した.術後より40度 …

    Ped Cardiol Card Surg 31(1-2), 64-67, 2015

    CrossRef

  • 18

    Fabrication and characterization of the anode-supported solid oxide fuel cell with Ni current collector layer  [in Japanese]

    KAO Wei-Xin , LIN Tai-Nan , LEE Maw-Chwain

    … The operation parameters are systematically investigated, such as feed rates of the reactants, operation temperature, contact pressure between current collectors and unit cell on the cell performance. … The contact pressure results between cell and test housing show that cell performance efficiency is enhanced at the high current density region. …

    Journal of the Ceramic Society of Japan 123(1436), 217-221, 2015

    CrossRef

  • 19

    Effect of semi-solid compression test on refinement of Si grains in hypereutectic Al-Si alloy  [in Japanese]

    FUKUI Yasuyoshi , NARA Daisaku , KUMAZAWA Noriyoshi

    … The results indicated that the finer silicon grains were obtained in cases of lower test temperature, higher compression rate, and larger compression stroke. … the effect of the shear rate, γ[s-1], and tested temperature, T [K], on silicon grain size, G[mm], was expressed using power-law model G = 0.08(T-Tm)0.4γ-0.24/(T-Tm). … The relation showed that high shear rate operation at just above the melting point must be the optimum condition. …

    TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A advpub(0), 2015

    CrossRef

  • 20

    Selection Criteria of Capacitors for Flying Capacitor Converters

    Obara Hidemine , Sato Yukihiko

    … The volume of the capacitors should be minimized to realize a high-power-density converter. … However, there is a limitation on the reduction in the volume due to the temperature increase caused by the power losses in the capacitors when the volume becomes small during high-PWM-frequency operation. …

    IEEJ Journal IA 4(2), 105-106, 2015

    CrossRef

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