Search Results 1-20 of 2801

  • Experiments on Boiling Heat Transfer of Low-pressure Refrigerants Inside a Horizontal Smooth Tube  [in Japanese]

    劉 宇飛 , 渡邊 和英 , 地下 大輔 , 井上 順広

    日本冷凍空調学会論文集 = Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers 37(1), 109-122, 2020

  • Experiments on Pressure Distribution of a Low Specific-Speed Centrifugal Pump with Atypical Open Impeller

    Zhang Yuliang , Zhu Zuchao , Li Wenguang

    … <p>In the present study, a novel testing system is presented for obtaining distribution characteristics of pressure field inside a low specific-speed centrifugal pump with atypical open impeller, wherein the components of the system are described in detail. … At three rotational speeds, the instantaneous static pressure on the casing wall of blade tip clearance and volute wall are measured under different flow conditions. …

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 53(6), 237-245, 2020

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  • Effects of Ambient Temperature and Carbon Dioxide on Isolated Droplet Burning Behavior of Oxidatively Degraded Methyl Oleate in Microgravity  [in Japanese]

    Shion ANDO , Yuxiang WU , Shinji NAKAYA , Mitsuhiro TSUE

    … Droplet combustion experiments were conducted at atmospheric pressure in air or CO<sub>2</sub> … In addition, at room temperature, puffing stopped and the droplet began to burn quiescently at the latter stage of burning, which is probably because only high-volatile components were injected by puffing and a large amount of low-volatile ones were remained in the droplet. …

    Journal of the Combustion Society of Japan 62(200), 152-160, 2020

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  • Meteorological Mechanism of a High Dose Rate Event Caused by the Eastward Advance of a Low Pressure System during Rainy Season  [in Japanese]

    TSUCHIDA Daisuke , YAGUCHI Reona , YAMAZAWA Hiromi , NARAZAKI Yukinori

    … Infrared satellite images and surface weather charts indicate that the intense precipitation was caused by cumulonimbus clouds along a stationary front, which accompanied a low pressure system. … The low pressure system had formed in central China approximately 18 to 36 hours before the high dose rate event. …

    Japanese Journal of Health Physics 55(1), 5-14, 2020

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  • A Parametric Study of a Multi-Slot Air Knife for Coating Thickness Reduction

    Yahyaee soufiani Ali , Mcdermid Joseph Robert , Hrymak Andrew Nick , Goodwin Frank Erik

    … In this study, a novel configuration of a multi-slot air knife was used as the wiping actuator in a parametric study of the gas jet wiping process. … The main goal of the study was to identify the operating window in which lighter coating weights can be achieved with the multi-slot air knife at higher strip velocities. …

    ISIJ International 60(5), 1040-1051, 2020

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  • Special Issue on MEMS for Robotics and Mechatronics

    Esashi Masayoshi , Tanaka Shuji , Aoyagi Seiji , Mineta Takashi , Suzumori Koichi , Dohi Tetsuji , Miki Norihisa

    … MEMS are also used in robotics and mechatronics since they can provide compact, low-cost functional components that play crucial roles in their respective systems. … We would like to elaborate on the history of MEMS technology, whose initial development started around 1970.</p><p>In 1960s, Dr. Isemi Igarashi of Toyota Central R&D Labs., Inc. in Japan developed a semiconductor pressure sensor of piezo-resistance type. …

    Journal of Robotics and Mechatronics 32(2), 279-280, 2020

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  • Development of Mass Production Technology for Nanofiber Air Filter and iPS Cell Culture Scaffold by Electro Bubble Spinning  [in Japanese]

    Kishimoto Yuki

    … <p>This paper reports on the production of nanofibrous materials from a nozzle-less electrospinning method, named "Electro Bubble Spinning", and their applications as air filters and iPS (induced pluripotent stem) cell culture scaffolds. … Electro bubble spinning enables the mass production of nanofibers by stirring the spinning solution with compressed air, resulting in the improvement of the productivity as compared to the nozzle method. …

    Annals of the High Performance Paper Society, Japan 58(0), 25-30, 2020

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  • Anesthetic Management of a Child with Noonan Syndrome, Hypertrophic Cardiomyopathy and Epilepsy  [in Japanese]

    HITOSUGI Takashi , OHTA Yuriko , SAKAI Junko , TAURA Shiori , ETO Nozomi , MORINAGA Saori , TSUKAMOTO Masanori , YOKOYAMA Takeshi

    … Orofacially, patients with Noonan syndrome have distinctive facial features that include ptosis of the eyelids, hypertelorism, and a low junction of the ears. … Intraoperative monitoring included noninvasive hemodynamic monitoring and direct monitoring of the arterial pressure. … After extubation, the stable spontaneous respiration of room air was achieved. … She became hypoxic, but she recovered with the administration of positive-pressure ventilation. …

    Journal of Japanese Dental Society of Anesthesiology 48(2), 60-62, 2020

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  • Effect of Li<sub>2</sub>CO<sub>3</sub> as a Grain Growth Promoting Agent on Properties Improvement of Reduction-resistant BaTiO<sub>3</sub>-based Lead-free Piezoelectric Ceramics  [in Japanese]

    Sakamoto Wataru

    … ceramics that exhibited a high piezoelectric constant equivalent or superior to that of samples prepared in air were successfully fabricated at temperatures below the melting point of Ni metal. … A desired reducing atmosphere was achieved by controlling the oxygen partial pressure with a suitable mixture of Ar, H<sub>2</sub>, and CO<sub>2</sub> …

    Journal of the Society of Powder Technology, Japan 57(2), 88-96, 2020

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  • Characteristics, Physical Mechanisms, and Prediction of Pre-summer Rainfall over South China: Research Progress during 2008–2019

    Luo Yali , Xia Rudi , Chan Johnny C. L.

    … The northern rain belt is closely linked to dynamic lifting by a subtropical low pressure and its associated front/shear line, whereas westward extension of the western North Pacific high and intensification of the southwesterly monsoonal flows play important roles in providing high-equivalent potential temperature air to the west- and east-inland regions, respectively. …

    Journal of the Meteorological Society of Japan. Ser. II 98(1), 19-42, 2020

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  • Statistical Characteristics of Pre-summer Rainfall over South China and Associated Synoptic Conditions

    Li Zhenghui , Luo Yali , Du Yu , Chan Johnny C. L.

    … Inland-region rainfall is closely linked to dynamic lifting driven by subtropical synoptic systems (low pressure and an associated front or shearline). … (equivalent potential temperature) air to the west- and east-inland regions, respectively. … Warm-sector coastal rainfall is closely related to the deceleration of the southerly boundary layer (BL) air flow over the northern SCS and associated convergence of BL high-<i>θ</i><sub>e</sub> …

    Journal of the Meteorological Society of Japan. Ser. II 98(1), 213-233, 2020

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  • Investigation of the Formation Mechanism of Urban-induced Heavy Rainfall Using Chemical and Stable Isotope Analysis

    UCHIYAMA Ryunosuke , OKOCHI Hiroshi , NAKANO Takanori , OGATA Hiroko , KATSUMI Naoya , KANEKO Chiho , KAMIYA Junichi , ASAI Daisuke

    … <p>In order to clarify the impact of air pollution on the formation of sudden and locally distributed heavy rain in urban areas (hereafter UHR = urban-induced heavy rain), we analyzed inorganic ions concentration, dissolved and suspended fraction of trace metals, and stable isotope ratio of water (δD and δ<sup>18</sup>O) in rainwater samples collected from 2008 to 2016 in Tokyo. … The concentration of air pollutants before the UHR was high, and secondary reaction rapidly progressed just before the UHR. …

    BUNSEKI KAGAKU 69(1.2), 45-68, 2020

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  • Skin Cleansing Technique with Disinfectant using Improved High-Velocity Steam-Air Micromist Jet Spray

    FUKUDA KOICHI , SATO YOKO , ISHIHARA MASAYUKI , NAKAMURA SHINGO , TAKAYAMA TOMOHIRO , MURAKAMI KAORU , FUJITA MASANORI , YOKOE HIDETAKA

    … Application of a high-velocity steam-air micromist jet spray (HVS-AMJS) with disinfectants for cleansing the skin is proposed. … Low-pressure steam is mixed with compressed air in a nozzle and then sprayed onto a surface of skin or material located approximately 22 cm from the nozzle. …

    Biocontrol Science 25(1), 35-39, 2020

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  • Flow Field and Combustion Field Control Using Pylons Installed Upstream of a Cavity in Supersonic Flow

    HIZAWA Tomohiro , YAMAGUCHI Tatsuya , MURATA Ko , YUGAMI Yasuto , HASEGAWA Mariko , KUDO Taku , HAYAKAWA Akihiro , KOBAYASHI Hideaki

    … A burned hydrogen/air gas mixture, rich in fuel, was injected in supersonic combustion experiments because self-ignition of fuel is difficult in a mainstream with low enthalpy. … Experimental data were collected using the shadowgraph method, direct photography of the flame, wall pressure measurement, and OH Planer Laser-induced Fluorescence (OH-PLIF) measurement. …

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 63(2), 50-61, 2020

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  • Present Status of Air Filters and Exploration of Their New Applications

    Lee Myong-Hwa , Choi Hyun-Jin , Kumita Mikio , Otani Yoshio

    … <p>There is an increasing demand of air filters with a high collection performance, i.e., high collection efficiency and low pressure drop, for the application to indoor air cleaning. … Air filters consisting of nanofibers have attracted great interests since they may have a low pressure drop because of slip flow effect and high collection efficiency due to enhanced interception effect. …

    KONA Powder and Particle Journal 37(0), 19-27, 2020

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  • Real-Time Monitoring of Low Pressure Oxygen Molecules over Wide Temperature Range: Feasibility of Ultrathin Hybrid Films of Iridium(III) Complexes and Clay Nanosheets

    Sato Hisako , Takimoto Kazuyoshi , Kato Masaru , Nagaoka Shin-ichi , Tamura Kenji , Yamagishi Akihiko

    … Hybridization was performed at an air-water interface between a floating monolayer of the Ir(III) complex and the nanosheets exfoliated in an aqueous subphase. … The emission from the deposited films exhibited rapid reversible change of intensity in response to the introduction or evacuation of oxygen gas in the pressure range of 0.1–101.3 kPa and the temperature range from 253 K to 313 K. …

    Bulletin of the Chemical Society of Japan 93(2), 194-199, 2020

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  • Proposal and Basic Characteristics Evaluation of Partial Closed Type Parafoil for Martian Exploration Probe  [in Japanese]

    Moriyoshi Takahiro , Maekawa Hiromu , Yamada Kazuhiko , Nishida Hiroyuki

    … However, a conventional parafoil which is ram air type might be not inflated by lower ram pressure at low density atmosphere environment. …

    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 68(1), 47-55, 2020

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  • Influence of Injection Distance on Water Droplet Behavior in High Pressure Descaling

    Tamura Yuta , Ueoka Satoshi , Kimura Yukio , Kabeya Kazuhisa

    … Because the impact pressure of the descaling jet is one important factor from the viewpoint of mechanical breaking and applying thermal shock to scale layers, the water jet structure and the droplet velocity should have large effects on scale breaking properties. … High pressure descaling nozzles with pressures up to 25 MPa were used, and the injection distance was varied in the range from 30 to 400 mm. …

    ISIJ International 60(1), 128-135, 2020

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  • Spray and combustion characteristics of CO_2 gas dissolved diesel fuel  [in Japanese]

    向山 智之 , 朝井 豪 , 栗林 真幹 , 松村 恵理子 , 千田 二郎 , ムカヤマ トモユキ , アサイ ゴウ , クリバヤシ マサキ , マツムラ エリコ , センダ ジロウ , Mukayama Tomoyuki , Asai Go , Kuribayashi Masaki , Matsumura Eriko , Senda Jiro

    … When the fuel is injected into the chamber in low pressure, this CO_2 gas is separated from the fuel spray. … Effervescence of CO_2 gas improves evaporation of the spray, and it promotes air-fuel mixture formation. … The temperature and KL factor become lower with the increase in dissolved pressure. …

    同志社大学ハリス理化学研究報告 = The Harris science review of Doshisha University 60(3), 115-126, 2019-10

    IR  DOI 

  • USEFULNESS VERIFICATION BY SUBJECTIVE EXPERIMENT OF EVALUATION METHOD FOR THERMAL ENVIRONMENT "SCORE ON THE WARMTH" UTILIZING CASBEE HOUSING HEALTH CHECKLIST  [in Japanese]

    ARAKI Yumiko , WATANABE Yosuke , WAKABAYASHI Koya , TANABE Shin-ichi , KAGIYA Shin-ichi , FUJIMURA Hiroko , TSUDA Keiko

    … <p> In Japan, there are many residential houses built before 1980 and many houses with low thermal insulation performance do not meet current energy-saving standards. … Low insulation performance results in lower temperatures during winter, which may adversely affect health. …

    Journal of Environmental Engineering (Transactions of AIJ) (763), 845-854, 2019-09

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