Search Results 1-20 of 349

  • EFFECTS OF MATERIAL SEPARATION OF POLYE-MODIFIED CEMENT WATERPROOFING MEMBRANES ON FATIGUE RESISTANCE OF JOINT AT SUBSTRATE  [in Japanese]

    TSUKAGOSHI Masayuki , NAKAMORI Masaki , UEDA Takao , TANAKA Kyoji

    … <p> A polymer-modified cement waterproofing membrane is a construction material (PCWM) with a high polymer to cement ratio (P/C) of 100 to 200% by weight, which improves waterproofing and elongation performance. … When PCWM is applied to horizontal surfaces such as roofs and floor slabs, the cement component will settle in the material due to the difference in specific gravity of polymer and cement. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (781), 353-360, 2021-03

    J-STAGE  AIJ 

  • General Relativity solutions with stealth scalar hair in quadratic higher-order scalar-tensor theories

    Takahashi Kazufumi , Motohashi Hayato

    Journal of Cosmology and Astroparticle Physics 2020(06), 034, 2020-06

    IR 

  • Polarized Initial States of Primordial Gravitational Waves

    Kanno Sugumi , Soda Jiro

    … Polarizations of primordial gravitational waves can be relevant when considering an inflationary universe in modified gravity or when matter fields survive during inflation. …

    Symmetry 12(4), 672, 2020-04

    IR 

  • Modified celestial amplitude in Einstein gravity

    Shamik Banerjee , Sudip Ghosh , Pranjal Pandey , Arnab Priya Saha

    … In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in [4]. … We find that the modified (tree) amplitude is finite for gravitons in Einstein gravity. … The modified amplitude behaves like correlation function of operators inserted at various points of null-infinity in the Minkowski space-time. …

    Journal of High Energy Physics 2020(3), 125, 2020-03-23

    IR 

  • Weakly-coupled stealth solution in scordatura degenerate theory

    Motohashi Hayato , Mukohyama Shinji

    In scalar-tensor theories we revisit the issue of strong coupling of perturbations around stealth solutions, i.e. backgrounds with the same forms of the metric as in General Relativity but with non-tr …

    Journal of Cosmology and Astroparticle Physics (2020), 2020-01

    IR 

  • Hydraulic Investigation of Piano Key Weir

    Anh Tuan Le , Hiramatsu Ken

    … <p>Piano Key weir is a modified labyrinth weir that uses cantilevered up- and downstream overhangs in order to restrict its basis length. … The small footprint on foundation of Piano Key weirs allows an easier placement on the crest of the existing dams such as concrete gravity dams and arch dams. …

    Reviews in Agricultural Science 8(0), 310-322, 2020

    J-STAGE 

  • Velocity Measurement of Microbubbles Driven by Electric Field in Horizontal Direction  [in Japanese]

    YOKOI Syuuya , YOSHIOKA Shuya

    … Direction of the microbubble movement is limited only in horizontal direction to avoid influence of gravity. … From the above, it is confirmed that the velocity of microbubble is able to be modified by electric field strength and diameter of the microbubble.</p> …

    Journal of the Japanese Society for Experimental Mechanics 20(2), 109-114, 2020

    J-STAGE 

  • Effects of Fall Experience on the Relationship between Subjective Assessment of Walking and Objective Motor Assessment  [in Japanese]

    HIRAI Tatsuya , MAKIZAKO Hyuma , ISHIKAWA Yasunobu , WAKATSUKI Yuuki , YOSHIMOTO Yuuki

    … <p>〔目的〕自己の歩行に対する主観的な評価である日本語版modified Gait Efficacy Scale(日本語版mGES)と客観的な運動機能評価との関連性が転倒経験の有無により異なるかを検討すること.〔対象と方法〕対象は65歳以上の地域在住高齢者で転倒経験により転倒群13名と非転倒群50名に分けた.日本語版mGES,重心動揺,Timed up and go(TUG)の測定を行った.〔結果〕転倒経験の有無 …

    Rigakuryoho Kagaku 35(2), 263-266, 2020

    J-STAGE  Ichushi Web 

  • Screened and unscreened solutions for relativistic star in de Rham-Gabadadze-Tolley massive gravity

    Yamazaki Masashi , Katsuragawa Taishi , Odintsov Sergei D. , Nojiri Shin'ichi

    … We study the static and spherical symmetric configurations in the nonminimal model of the de Rham-Gabadadze-Tolley (dRGT) massive gravity with a flat reference metric. … Considering the modified Tolman-Oppenheimer-Volkof equation, the Bianchi identity, and energy-momentum conservation, we find a new algebraic equation for the radial coordinate of the reference metric. …

    Physical Review D 100(8), 084060, 2019-10-25

    IR 

  • Minimally Modified Gravity: a Hamiltonian Construction

    Noui Karim , Mukohyama Shinji

    … Minimally modified gravity theories are modifications of general relativity with two local gravitational degrees of freedom in four dimensions. …

    Journal of Cosmology and Astroparticle Physics (2019), 2019-07

    IR 

  • Ghost-free Gauss-Bonnet theories of gravity

    Nojiri S. , Odintsov S. D. , Oikonomou V. K.

    … In this work we develop a theoretical framework for Gauss-Bonnet modified gravity theories, in which ghost modes can be eliminated at the level of the equations of motion. … Some cosmological realizations in the context of ghost-free f(G) gravity are presented, by using the reconstruction technique we developed. … Finally, we explore the modifications to Newton's law of gravity generated by the ghost-free f(G) theory. …

    Physical Review D 99(4), 044050, 2019-02-26

    IR 

  • A Modified Passive Mechanism to Assist the Postural Transition of a Person with Paraplegia  [in Japanese]

    EGUCHI Yosuke , KADONE Hideki , SUZUKI Kenji

    … <p>A modified assistance device for sit-to-stand and stand-to-sit postural transfer of a person with paraplegia is introduced in this paper. … The transfer is controlled by a user utilizing shifting of their center of gravity through anteroposterior of the torso. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2019(0), 2A2-A08, 2019

    J-STAGE 

  • PRELIMINARY ASSESSMENT OF THE LONG-TERM RADIOLYTIC GAS ACCUMULATION IN MODIFIED MEASUREMENT PIPELINE FOR BWR WITH GASFLOWMPI

    Yabing Li , Han Zhang , Jianjun Xiao , Jordan Thomas

    … The main objection of this study is to conduct a preliminary assessment for a new modified measurement pipeline for BWR with GASFLOW-MPI, evaluating the long-term radiolytic gas accumulation. … Then a 2D model for a modified measurement pipeline of BWR is built and analyzed with GASFLOW-MPI to evaluate the long-term radiolytic gas accumulation. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2019.27(0), 2229, 2019

    J-STAGE 

  • Large bulk crystal growth by the modified infrared convergent heating floating zone method  [in Japanese]

    WATAUCHI Satoshi

    <p>赤外線集中加熱浮遊帯溶融(IR-FZ)法は坩堝(るつぼ)不要のバルク結晶育成法の1つである.坩堝材の消耗や結晶中への混入を懸念する必要がない点では優れているが,育成中に原料と育成結晶の間の中空に形成する溶融帯が不安定になりやすい.そのため,溶融帯の安定保持には習熟が必要である.育成可能な結晶径も,せいぜい6〜15mm程度と小さかったことも大きな欠点である.しかし,赤外線集中加熱法 …

    Oyo Buturi 88(11), 735-739, 2019

    J-STAGE 

  • Fall Risk Estimation for Inpatients on Beds Using Three-dimensional Range Image Sensor  [in Japanese]

    Isomoto Keisuke , Kushida Daisuke

    … In this method, the obtained depth data are modified as if Kinect were above the center of the bed to estimate fall risks accurately. … Then, these corrected data are divided into multiple cells, and human location is detected using gravity coordinates obtained from the data in each cell. …

    IEEJ Transactions on Electronics, Information and Systems 139(8), 919-926, 2019

    J-STAGE 

  • ANALYTICAL STUDY ON SEISMIC RESPONSE OF REINFORCED CONCRETE BUILDINGS CONSIDERING P-Δ EFFECT  [in Japanese]

    YAMAKAWA Kouki , OTSUKA Yuri , ITO Miei , HIRAISHI Hisahiro

    … <p> The P-Δ effect caused by additional moment due to gravity load produces when the building responses by earthquakes, and produces the influence on the earthquake resistance properties particularly for buildings with a small base shear coefficient. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) 84(759), 685-694, 2019

    J-STAGE 

  • Reusable Floating Beads with Immobilized Xylose-Fermenting Yeast Cells for Simultaneous Saccharification and Fermentation of Lime-Pretreated Rice Straw

    Guan Di , Zhao Rui , Li Yuan , Sakakibara Yoshikiyo , Ike Masakazu , Tokuyasu Ken

    … Genetically modified <i>Saccharomyces</i> … cells expressing genes encoding xylose reductase, xylitol dehydrogenase, and xylulokinase were immobilized in calcium alginate beads containing inorganic lightweight filler particles to reduce specific gravity. …

    Journal of Applied Glycoscience 66(1), 21-28, 2019

    J-STAGE 

  • Parity-violating gravity and GW170817

    Nishizawa Atsushi , Kobayashi Tsutomu

    … We consider gravitational waves (GWs) in generic parity-violating gravity, including recently proposed ghost-free theories with parity violation as well as Chern-Simons (CS) modified gravity, and study the implications of observational constraints from GW170817/GRB 170817A. …

    Physical Review D 98(12), 124018, 2018-12-15

    IR 

  • Research on the Influence of Regional Image on Migration from Large Cities to Rural Areas  [in Japanese]

    荒川 清晟

    査読研究論文

    情報学研究 : 学環 : 東京大学大学院情報学環紀要 (95), 57-72, 2018-10-31

    IR  DOI 

  • Effects of modified gravity on the turnaround radius in cosmology

    Nojiri Shin'ichi , Odintsov Sergei D. , Faraoni Valerio

    … We revisit the concept of turnaround radius in cosmology, in the context of modified gravity. … While preliminary analyses were limited to scalar-tensor/F(R) gravity, we extend the definition and the study of this quantity to a much broader class of theories including also quantum R^2 gravity. …

    Physical Review D 98(2), 024005, 2018-07-15

    IR 

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