Search Results 1-20 of 1498

  • Development of a TOF-ERDA measurement system for depth profiling of light elements and its application  [in Japanese]

    YASUDA Keisuke , SUZUKI Kohtaku

    <p>飛行時間測定弾性反跳粒子検出法（TOF-ERDA）はイオンビームを用いた分析手法の1つで，エネルギーが数～数十MeVのイオンビームを試料に照射し，反跳された試料内原子のエネルギーと飛行時間を同時に測定する．軽元素から重元素までの幅広い範囲の元素を元素分離して，かつ優れた深さ分解能で分析することが可能で，特に薄膜中の軽元素の分析に威力を発揮する．本稿では，我々が開発したTOF-ER …

    Oyo Buturi 90(4), 234-238, 2021

    J-STAGE 

  • Landing dynamics of a seagull examined by field observation and mathematical modeling

    Eisaki Yuri , Hikosaka Isamu , Kawabe Tohru , Aihara Ikkyu

    … First, we recorded the landing behavior of an actual seagull by two video cameras and quantified the flight trajectory and the wing angle as time series data. … By performing the numerical simulation combining the mathematical model and empirical data, we examined behavioral mechanism reproducing the flight trajectory of an actual seagull during landing behavior.</p> …

    Nonlinear Theory and Its Applications, IEICE 12(2), 205-224, 2021

    J-STAGE 

  • Usefulness of 3 Tesla Ultrashort Echo Time Magnetic Resonance Angiography (UTE-MRA, SILENT-MRA) for Evaluation of the Mother Vessel after Cerebral Aneurysm Clipping: Case Series of 19 Patients

    KATSUKI Masahito , TOMINAGA Teiji , NARITA Norio , ISHIDA Naoya , SUGAWARA Kazuya , WATANABE Ohmi , OZAKI Dan , SATO Yoshimichi , KATO Yuya , JIA Wenting

    … Contrast-enhanced computed tomography angiography has side effects of contrast medium and radiation exposure. … Time-of-flight magnetic resonance angiography (TOF-MRA) is a fast and non-invasive method, but clip-induced artifact limits the assessment around the clip. …

    Neurologia medico-chirurgica 61(3), 193-203, 2021

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  • Preliminary statistical investigation of anomaly detection in non-target environmental monitoring by comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry

    HASHIMOTO Shunji , OHTSUKA Nobutoshi , ONIZUKA Yumiko , IEDA Teruyo , NAKAJIMA Daisuke , SUZUKI Noriyuki

    … <p>The notable challenges facing non-target environmental monitoring are the improvement of the reproducibility of extraction rates and the selection of internal standards for concentration correction. … In the present study, a rapid and comprehensive analytical method, which we had developed in a previous study, greatly reduces the need for pretreatment. …

    Environmental Monitoring and Contaminants Research 1(0), 28-36, 2021

    J-STAGE 

  • Simultaneous Quantitative Screening for Pain Medications in Serum by High-Performance Liquid Chromatography/Time-of-Flight Mass Spectrometry with Solid-Phase Dispersive Extraction

    SAITO Koichi , NISHIYAMA Rika , ITO Rie

    … <p>In this study, solid-phase dispersive extraction (SPDE) was used for serum pretreatment and in the simultaneous analysis of analgesics and adjuvant analgesics (30 types in total) that are usually used as first-and second-choice treatments for pain patients, by liquid chromatography/time-of-flight mass spectrometry (LC/TOF-MS). …

    CHROMATOGRAPHY, 2021

    J-STAGE 

  • A Statistical Trust for Detecting Malicious Nodes in IoT Sensor Networks

    WANG Fang , WEI Zhe

    … <p>The unattended malicious nodes pose great security threats to the integrity of the IoT sensor networks. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2021

    J-STAGE 

  • Application of Numerical Simulation of the Toner Melt Behavior to Toner Development  [in Japanese]

    FUJISAKI Tatsuya , MANDAI Makiko , KAGAWA Tetsuya , ITOU Hiroto

    … 法を用いた溶融シミュレーションを構築しトナーの溶融挙動に加えてワックス染み出し性を予測することを可能にした．実験検証として，モデルトナーを作成し，定着性およびTOF-SIMS (time of flight secondary ion mass spectrometry) によるワックス染み出し量を測定した結果，計算結果と実験結果が整合することを確認した．さらに，本手法を用い小径化の効果を予め計算で予測し実際に実 …

    NIHON GAZO GAKKAISHI (Journal of the Imaging Society of Japan) 60(1), 3-8, 2021

    J-STAGE 

  • Tuning Neutron Resonance Spin-Echo Spectrometers with Pulsed Beams

    Oda Tatsuro , Hino Masahiro , Endo Hitoshi , Seto Hideki , Kawabata Yuji

    … The neutron spin-echo spectroscopy technique involving pulsed beams can be used to effectively access a wide range of space-time correlations of condensed matter. … In this study, the features of this technique, in particular, the modulation of the intensity with zero effort (MIEZE) by using pulsed beams, which is based on the quantum-state manipulation of the neutron spin and energy, are comprehensively examined. …

    Physical Review Applied 14(5), 2020-11-16

    IR 

  • Novel absorbance peak of gentisic acid following the oxidation reaction

    Hosokawa Sho , Shukuya Kenichi , Sogabe Keisuke , Ejima Yasukazu , Morinishi Tatsuya , Hirakawa Eiichiro , Ohsaki Hiroyuki , Shimosawa Tatsuo , Tokuhara Yasunori

    … Gentisic acid (GA), a metabolite of acetylsalicylic acid (ASA), and homogentisic acid (HGA), which is excreted at high levels in alkaptonuria, are divalent phenolic acids with very similar structures. … We recently reported a new oxidation method of HGA involving the addition of sodium hydroxide (NaOH) with sodium hypochlorite pentahydrate (NaOCl·5H2O), which is a strong oxidant. …

    PLoS ONE 15(4), e0232263, 2020-04-29

    IR 

  • Evaluation method of transit time difference for clamp-on ultrasonic flowmeters in two-phase flows

    Murakawa Hideki , Ichimura Shuhei , Sugimoto Katsumi , Asano Hitoshi , Umezawa Shuichi , Sugita Katsuhiko

    Experimental Thermal and Fluid Science (112), 109957, 2020-04-01

    IR 

  • A Short-Pulse Based Time-of-Flight Image Sensor using 4-tap Charge-Modulation Pixels with Accelerated Carrier Response  [in Japanese]

    井上 道裕 , 大黒 聖平 , 近藤 啓太 , 駒澤 彰人 , マース カメル , 安富 啓太 , 香川 景一郎 , 川人 祥二

    映像情報メディア学会技術報告 = ITE technical report 44(11), 25-28, 2020-03

  • Neutron total cross section measurements of polyethylene using time-of-flight method at KURNS-LINAC

    Lee Jaehong , Nishiyama Jun , Hori Jun-Ichi , Kimura Rei , Sako Takayuki , Yamada Akira , Sano Tadafumi

    … The neutron total cross sections of polyethylene have been measured in the energy region from 0.001 eV to 40 keV by the time-of-flight (TOF) method using the Kyoto University Institute for Integrated Radiation and Nuclear Science – Linear Accelerator (KURNS-LINAC). …

    Journal of Nuclear Science and Technology 57(1), 1-8, 2020-01-02

    IR 

  • Verification of Ablation Detection Method in an Unsteady Heating Environment  [in Japanese]

    HIRANO Kotaro , NAKAMURA Tukasa , ISHIDA Yuichi , SAKAI Takeharu

    … <p>Ablation detection accuracy of an ablation sensor named Ablation Sensor Unit (ASU), which can measure surface recession, thermal decomposition, and temperature of an ablative heat shield material, is examined under time-varying heating condition. … Time-resolved ASU data for surface recession and the charred front is reported for a time-dependent heating condition. …

    The Proceedings of Mechanical Engineering Congress, Japan 2020(0), S19107, 2020

    J-STAGE 

  • Attitude Control and Translational Position Control in Autonomous Flight System to Create Microgravity Space  [in Japanese]

    HIROI Ryohei , TATSUYA Shota , TAKEDA Masakazu , SUGAWARA Yoshiki

    … <p>This paper describes development of the autonomous flight system to create microgravity space on the earth. … The problem of previous studies is that the control system design does not consider the horizontal position control and acceleration control. … But the proposed system needs to control angle of attitude, horizontal position and vertical position at the same time. …

    The Proceedings of Mechanical Engineering Congress, Japan 2020(0), J16205, 2020

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  • Developing a measurement system of the velocity distribution of evaporating molecules using a nanoporous array  [in Japanese]

    MATSUSHIMA Atsushi , MURATA Kenkichi , YOSHIMOTO Yuta , TAKAGI Shu , KINEFUCHI Ikuya

    The Proceedings of Mechanical Engineering Congress, Japan 2020(0), J05215, 2020

    J-STAGE 

  • Measurement of helium isotope ratio using multi-turn time-of-flight mass spectrometer  [in Japanese]

    Hattori Yuki , Akiyama Yoshihide , Sumino Hirochika

    <p>火山ガス中のヘリウム同位体比は地殻とマグマの寄与率に応じて変動するため，火山活動を監視する指標として有用である。火山活動の監視には連続的な分析が必要となるが，ヘリウム同位体比の測定には高い質量分解能と感度が必要なことから大型の磁場型質量分析計が用いられており，連続分析は困難である。我々は，可搬型・高質量分解能のマルチターン飛行時間型質量分析計(MULTUM)を用いた新しい希ガス分 …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 67(0), 147, 2020

    J-STAGE 

  • Cepstral Subtraction for Ultrasonic Signal Processing in Liquid-film Thickness Measurement under High-temperature and High-pressure Conditions of Boiling Water Reactors  [in Japanese]

    FURUICHI Hajime , KATONO Kenichi , YASUDA Kenichi

    … <p>We have been developing the ultrasonic liquid film sensor to measure the liquid film thickness under high-temperature and high-pressure conditions of Boiling Water Reactors (BWRs), focusing on thin film thickness in pre-/post-dryout. … The liquid film sensor utilizes Time-of-Flight (ToF) detection based on the ultrasonic pulse-echo method. …

    JAPANESE JOURNAL OF MULTIPHASE FLOW 34(4), 520-531, 2020

    J-STAGE 

  • The study of feature extraction from TOF-SIMS image data of skin stratum corneum using machine learning  [in Japanese]

    Matsuda Kazuhiro , Aoyagi Satoka

    <p>飛行時間型二次イオン質量分析（TOF-SIMS）は、生体組織の高感度組成イメージングに有用な分析手法であるが、その情報量の多さから一般にデータ解析が困難である。そこで本研究では、近年発展が著しいニューラルネットワークを利用した特徴抽出法であるAutoencoderの、解析への適用を検討した。皮膚角質層のTOF-SIMSイメージへの適用検討から、薬剤や脂質の分布状態を抽出できること …

    Abstract book of Annual Meeting of the Japan Society of Vacuum and Surface Science 2020(0), 175, 2020

    J-STAGE 

  • Performance Analysis and Prediction using Probabilistic Models for Arrival Air Traffic Flow Control  [in Japanese]

    Miyazawa Yoshikazu , Itoh Eri

    … <p>The performance of incoming air traffic flow control to Tokyo International Airport is studied using surveillance data for future automatic arrival management system development. … A probabilistic model that simulates the queueing mechanism of air traffic flow control is built from the time data of all flights that cross the boundaries of appropriately assumed traffic control area. …

    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 68(6), 213-222, 2020

    J-STAGE 

  • A Case of a Brain Abscess with <i>Streptococcus intermedius </i>Rapidly Diagnosed with the Melting Temperature Mapping Method  [in Japanese]

    UEJIMA Yoji , KURIHARA Jun , FURUICHI Mihoko , SATO Satoshi , NIIMI Hideki , KAWANO Yutaka , OH-ISHI Tsutomu , SUGANUMA Eisuke

    … <p>An 11-year-old boy, who had undergone repair of a total anomalous pulmonary venous connection (TAPVC) and double outlet right ventricle (DORV) during infancy, presented with a headache. … Computed tomography (CT) scan revealed a mass on the left frontal lobe of his brain. … The melting temperature mapping method revealed <i>Streptococcus intermedius </i>in the intracranial pus 4.5 h after drainage. …

    Kansenshogaku Zasshi 94(3), 332-337, 2020

    J-STAGE  Ichushi Web 

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