Yuta Sato

Nihon University

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10313 Digital Image Correlation Analysis of Orthodontic Brackets Subjected to Force Couple Produced by Wire Rotation

The Proceedings of Conference of Kanto Branch (2015)

Yusuke Kanai Yuta Sato Eisaku Umezaki Shigenori MATSUI Daigo Komazawa

The deformations of orthodontic brackets subjected to force couple produced by orthodontic wire rotation were investigated. Polycarbonate, stainless-steel and ceramic brackets were used. The wire was rotated using two stepping motors, which were equipped in an orthodontic torque simulator. Images of the brackets were acquired using a stereo microscope and two image charge-coupled device cameras, and the deformation of the brackets was measured using a three-dimensional digital image correlation technique. The total angle of rotation of the wire was 28.8 degrees. Results indicated that the deformation of the plastic bracket was larger than those of the stainless steel and ceramic brackets.

Digital image correlation

Polycarbonate

Angle of rotation

10.1299/jsmekanto.2015.21._10313-1_

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X ray diffraction compression studies of hematite under hydrostatic, isothermal conditions

Journal of Geophysical Research Atmospheres (1978)

D. R. Wilburn William A. Bassett Yuta Sato Syun-iti Akimoto

Compression data for α‐Fe 2 O 3 were collected using two independent X ray diffraction techniques in which a sample was compressed under hydrostatic conditions. Samples of varying quality were used. In each case, a value of 1.99 ± 0.06 Mbar was calculated for K 0 , assuming a value of 4.0 for K 0 ′. These data are in good agreement with the value obtained by Lieberman and Schreiber (1968) using ultrasonic methods. The bulk modulus was found to be lower, however, than an earlier, nonhydrostatic value of 2.28 Mbar reported by Bassett and Takahashi (1974). The sample of highest purity produced data which deviate from the other observed data in the region of 30 kbar. This discrepancy may be due to the Morin transition.

Isothermal process

Hydrostatic equilibrium

10.1029/jb083ib07p03509

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Citations (83)

EXPERIMENTAL STUDY ON POTENTIAL RISK IN HOUSE UNDER FLOOD INUNDATION

Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering) (2019)

Yuta Sato Kaho Ohta Rikako Suzuki Asataro Shinohara Shiho ONOMURA

H30年西日本豪雨で発生した岡山県倉敷市真備町の人的被害は死者51名中44名が自宅で見つかり，その中の43名が一階で発見された．本研究では，家屋内浸水時の潜在リスクを把握するために，実物大スケールの家屋内浸水実験を行った．ここでは，水槽内にて実物大の部屋とドアを作製し，ドア開扉実験と家具転倒・散乱実験，避難実験を行った．その結果，ドア両側の水位差がわずか15-20cmでもドアを開けられない状況が確認された．家具転倒・散乱実験により，水位が高くなるとタンスが倒れて怪我のリスクがあることや避難通路を塞ぐ可能性が明らかとなった．その後の避難実験でも，大きなタンスが避難の妨げになることが示された．

10.2208/jscejhe.75.2_i_1375

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Effect of Microporous Filtration Media and Tidal Flow Condition on Disinfection Efficiency of Filtration Bed Immobilized with Nanosilver

Japanese Journal of Water Treatment Biology (2020)

Kazunori Nakano RIKU NOMURA NAOHIRO ENDO Yuta Sato

本研究では、塩素を使用せず電力や光も不要な消毒処理システムを開発することを目指し、光に依存せずに活性酸素を介した消毒作用の発揮が可能な銀ナノ粒子を付加したろ床を考案した。7種類のろ材にナノ銀を付加し、回分消毒試験により消毒作用を比較した結果、高い消毒作用を示した上位3種のろ材は、軽石、活性炭及びゼオライトであり、その共通点が多孔質であることから、ナノ銀の消毒作用を発揮させるろ材として多孔質ろ材が適していることが明らかになった。最も消毒作用に優れていたナノ銀付加軽石をカラムに充填してろ床を作製し、大腸菌群を含む試験水の流入と排出を間欠的に行うタイダルフロー条件で連続消毒試験を行い、タイダルフロー条件が消毒作用に及ぼす効果と消毒作用の持続性について検証した結果、ナノ銀付加ろ床と試験水の接触時間よりもろ床が大気に晒される干水時間が重要であり、干水時間が長い程、高い消毒作用が得られることが明らかとなった。消毒処理回数の積算値が100回を超えても消毒作用を維持できたことから、軽石に付加したナノ銀の消毒作用の持続性を確認することができた。これらの結果より、ナノ銀付加ろ床により塩素や電力に依存せずに消毒処理が行えるシステムが構築できる可能性を示すことができた。

Filtration (mathematics)

Air filtration

10.2521/jswtb.56.27

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EQUATION OF STATE OF MANTLE MINERALS DETERMINED THROUGH HIGH-PRESSURE X-RAY STUDY

High Pressure Research (1977)

Yuta Sato

Pressure-volume relationship of the rutile structure (TiO2, SiO2, MnO2) and the spinel structure (γ-Fe2SiO4, γ-Co2SiO4, γ-Ni2SiO4) were determined through X-ray diffraction measurements under hydrostatic compression up to about 120 kbar. The isothermal bulk modulus KT of stishovite was determined to be 2.81 Mbar for the assumed pressure derivative KT′ = 5.0 and 3.01 Mbar for KT′ = 0. The values KT of spinels were determined to be 1.97, 2.06 and 2.23 Mbar for γ-Fe2SiO4, γ-Co2SiO4 and γ-Ni2SiO4, respectively, for an assumed value 4.0 of KT′.

Stishovite

Rutile

Hydrostatic equilibrium

Hydrostatic pressure

Isothermal process

10.1016/b978-0-12-468750-9.50028-0

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Citations (110)

Synthesis of [2]Catenanes by Oxidative Intramolecular Diyne Coupling Mediated by Macrocyclic Copper(I) Complexes

Angewandte Chemie (2009)

Yuta Sato Ryu Yamasaki Shinichi Saito

Beim Verfassen dieser Zuschrift übersahen die Autoren Beiträge, in denen die Synthese verzahnter Verbindungen durch die Glaser-Kupplung und ähnliche Reaktionen beschrieben wurde. Verweise auf diese Veröffentlichungen sollen nun in Lit. 9 eingeschlossen werden. Die Autoren danken Professor Ognjen Š. Miljanić (University of Houston) für den Hinweis.

Catenane

10.1002/ange.200990077

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Design and development of SNS system and user profile module for connecting learning research and teaching and classroom practice

Society for Information Technology & Teacher Education International Conference (2009)

Yuta Sato Kanji Akahori

Source

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Synthesis of [2]Catenanes by Oxidative Intramolecular Diyne Coupling Mediated by Macrocyclic Copper(I) Complexes

Angewandte Chemie (2008)

Yuta Sato Ryu Yamasaki Shinichi Saito

Geschickt eingefädelt: Oxidative intramolekulare Kupplungen von α,ω-Diinen in Gegenwart von Kupfer(I)-Komplexen makrocyclischer Phenanthrolinderivate führen in Ausbeuten bis 64 % zu [2]Catenanen (siehe Schema). Die Bindungsknüpfung geht mit dem Einfädeln des Diins in den Phenanthrolinmakrocyclus einher. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.

Schema (genetic algorithms)

10.1002/ange.200804864

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Citations (26)

FUNDAMENTAL STUDY ON SEISMIC RESISTANCE OF LEVEE UNDER PENETRATION USING TEST CHANNEL FOR COMPOUND DISASTER OF EARTHQUAKE AND FLOODS

Journal of Japan Society of Civil Engineers Ser B1 (Hydraulic Engineering) (2018)

Yuki Kurakami Yasuo NIHEI Tomoya Yasui Takuya Sakuraba Yuta Sato

河川堤防における地震・洪水の複合災害の実態解明やその技術開発を行うべく新たに導入した地震・洪水複合災害用水路を用いて，加振・浸透実験を行い，浸透条件下の河川堤防の耐震性や浸透対策工の耐震効果を検討した．まず，基礎地盤のみ浸潤させたケースと表のり面に河川水として一定水位与えたケースでの加振実験を行い比較したところ，表のり面の河川水が押え盛土のような効果を発揮し，基礎地盤のみ浸潤させたケースよりもはらみだしや沈下を抑制した．また，堤体の変形が生じるとともに過剰間隙水圧の値も上昇することが分かった．裏のり面薄層ドレーン工では，ドレーン工が過剰間隙水圧を消散し，天端沈下を抑制し，浸潤面低下のみならず加振時の過剰間隙水圧上昇を抑制していることが明らかとなった．

Earthquake resistance

Penetration test

Seismic microzonation

10.2208/jscejhe.74.i_1261

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A method of crushing using the triaxial stress apparatus

Powder Technology (1987)

M. Yoda Kei Tamura Atsushi Hashimoto Yuta Sato

Brittleness

Overburden pressure

Brittle fracture

Cylinder stress

10.1016/0032-5910(87)80148-1

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Citations (1)