Search Results 1-20 of 1456

  • Separation of saccharides using fullerene-bonded silica monolithic columns via π interactions in liquid chromatography

    Kobayashi Hiroshi , Okada Kazuya , Tokuda Shinnosuke , Kanao Eisuke , Masuda Yusuke , Naito Toyohiro , Takaya Hikaru , Yan Mingdi , Kubo Takuya , Otsuka Koji

    … 2020-08-26.We report on a potential method to separate sugars by using the specific interaction between fullerenes and saccharides in liquid chromatography (LC). … Theoretical study based on molecular dynamics and DFT calculation demonstrated that a supramolecular complex of saccharide–fullerene was formed through CH–π and/or OH–π interactions, and that the interactions between saccharide and fullerene increase with the increase units of the saccharide. …

    Scientific Reports (10), 2020-08-14



    IKARASHI Kikuo , IGAWA Naoki , YANAGISHITA Yoshihiro , MITSUI Kazuya

    … <p> The purpose of this study is to establish a design method for installing stiffeners on the web. … Therefore, it is necessary to take these effects into account to maximize the stiffening effects.</p><p> In this study, based on the energy method, the effect of installing stiffeners is investigated employing the rigidity ratios of the stiffeners to the web. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (773), 957-967, 2020-07


  • High aspect ratio calculation by analytical boundary element method with low cost and high accuracy  [in Japanese]

    山田 義博 , 登坂 宣好

    計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science 25, 6p, 2020-06

  • Development and Applications of a Fundamental Parameter Method for X-ray Fluorescence Analysis

    KATAOKA Yoshiyuki , KOHNO Hisayuki , KAWAHARA Naoki , OCHI Hirotomo , NISHINO Makoto , NAKAMURA Hideki

    … <p>The fundamental parameter (FP) method allows calculation of X-ray intensities theoretically and is used in various aspects of X-ray fluorescence (XRF) quantitative analysis. … Wavelength dispersive X-ray fluorescence (WDXRF) spectrometers capable of performing the FP method were first developed in the late 1980s by Japanese manufacturers Rigaku and Shimadzu. …

    BUNSEKI KAGAKU 69(7.8), 363-371, 2020



    NOJIMA Kazuya , SAKURABA Masaaki , KOTANI Takuma , HASHIMOTO Kenji , TAKASE Shinsuke

    … However, there are still many unclear points about the load caused by floating debris, and no analytical model or calculation formula to explain this effect has been established. … In addition, we applied the response surface method to the experimental results and tried to predict the load under multiple conditions.</p> …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 76(2), I_301-I_306, 2020


  • A STUDY ON THE AMOUNT OF RENEWABLE ENERGY SUPPLIED BY HEAT PUMP:A rough estimate of the amount of renewable energy from air-source heat based on the EU guideline  [in Japanese]

    YAMAKAWA Satoshi , KAWANO Masashi , MURAKAMI Kimiya

    … However, there exists no quantitative method for evaluating the amount of renewable energy supplied by heat pumps from heat collected from the air, and the actual performance of heat pumps are therefore unknown. … In the present study, we investigated a method to estimate the renewable-energy-based heat from air supplied by a heat pump in Japan. … This method is based on the quantitative evaluation method by the EU. …

    Journal of Environmental Engineering (Transactions of AIJ) 85(776), 733-743, 2020


  • Numerical analysis of fluid lubrication in line contact by using the MPS method  [in Japanese]

    NEGISHI Hideyo , FUJIHARA Hironori , TAKAHASHI Hidenao , SHIBATA Kazuya , MANIWA Kazuaki , OBARA Shingo

    … A general approach to solve the Navier-Stokes equations for predicting the fluid film behavior is proposed here using the moving particle simulation (MPS) method, which is a meshless, Lagrangian, particle-based method suitable to model moving or deforming boundaries, multiphase fluids, free surfaces, and complex geometry. …

    Transactions of the JSME (in Japanese) 86(890), 20-00241-20-00241, 2020


  • A Simultaneous evaluation of for Young's modulus and friction coefficient by three-point bending test in large deflection mode  [in Japanese]

    HORIBE Tadashi , KIMOTO Hiroshi , MORI Kotaro

    … <p>This paper describes a method for evaluating Young's modulus and the coefficient of friction between a beam and supporting member by three-point bending test in large deflection mode. … Then, analytical results which consist of elliptical integrals, are represented by approximated polynomials in order to reduce the calculation cost in the identifying process. …

    Transactions of Japan Society of Spring Engineers 2020(65), 51-58, 2020


  • A Method to Purify a Sample Derivatized with 2,4-Dinitrophenylhydrazine (DNPH) Using Solid Phase Extraction

    SHINFUKU Yuta , NAKAMURA Tomohiro , TAKANASHI Hirokazu , NAKAJIMA Tsunenori , UEDA Takehiko , AKIBA Michihiro

    … Injecting this residual DNPH into an analytical instrument may lead to some negative effects such as a damaged LC column, or a clogged sampling cone, probably resulting in an impaired detection sensitivity. … It is therefore of importance to remove unreacted DNPH prior to an analysis.</p><p>The objective of this study is to develop a purification method for a DNPH-derivatized sample. …

    ENVIRONMENTAL SCIENCE 33(5), 70-78, 2020


  • An idea of calculation for interior stress of material in continuum from derived from Constitutive Equation of Materials  [in Japanese]

    Toshihide Sugawara

    The Proceedings of Conference of Tohoku Branch 2020.55(0), 175_paper, 2020


  • Total Quantification of Magnesium Alloys by X-ray Fluorescence Spectrometry Using the "Standardless" Fundamental Parameter Method

    MATSUDA Wataru , MORIKAWA Atsushi , OHBUCHI Atsushi , MORIYAMA Takao , NAKAMURA Toshihiro

    … <p>X-ray fluorescence spectrometry using the "standardless" fundamental parameter method has been studied for the whole elemental analysis of magnesium alloys. … The total quantitative values of the 12 elements, determined by the FP calculation, were normalized to 100 mass%. … The analytical values obtained by this method were comparable to those obtained by the conventional calibration curves method. …

    Analytical Sciences 36(9), 1065-1070, 2020


  • Implementing PRED Subroutine of NONMEM for Versatile Pharmacokinetic Analysis Using Fast Inversion of Laplace Transform (FILT)

    Jin Ryota , Hisaka Akihiro

    … The solution in the Laplace transformed forms is inverse Laplace transformed to derive an analytical solution. … In this study, we focus on extending the modeling functions of Nonlinear Mixed Effect Model (NONMEM), a standard software for PK and population pharmacokinetic (PPK) analyses, by adding the Fast Inversion of Laplace Transform (FILT) method, one of the representative numerical inverse Laplace transform methods. …

    Chemical and Pharmaceutical Bulletin 68(9), 891-894, 2020


  • Influencing Factors for Determining the Crystallinity of Native Cellulose by X-ray Diffraction

    YU Shihua , LIU Zhigang , XU Na , CHEN Jie , GAO Yan

    … Therefore, when calculating the crystallinity of natural cellulose by fitting the peaks, only relying on the single evaluation factor of Rwp (R-weighted Pattern) may lead to great randomicity of calculation results. … Due to the special crystal structure of natural cellulose and the characteristics of crystallinity determination by peak separation method, the XRD Rietveld fitting method is adopted to determine the crystallinity of native cellulose. …

    Analytical Sciences 36(8), 947-951, 2020


  • Prediction of Interior Noise in Elevator Car by SEA Considering Natural Mode of Sound Field  [in Japanese]

    NOZAWA Yuki , NOGUCHI Naoaki , ABE Takashi , KARIYA Tomoki

    … <p>This paper presents an analytical model using Statistical Energy Analysis (SEA) to estimate noise at the interior of the car. … SEA is a method that calculates the transfer of energy using the average value of energy at a frequency band. … In the SEA model, since the calculation is performed with energy, the sound field and eigenmode cannot be taken into account. …

    The Proceedings of the Elevator, Escalator and Amusement Rides Conference 2020(0), 102, 2020


  • Theoretical verification that multi-point measurement of infrared spectra will lead to high accuracy of discrimination between heterogeneous samples.  [in Japanese]

    SUGAWARA Shigeru

    … Therefore, in this study, we verified it using numerical calculation software (Matlab). … Then, for both data groups, the number of data was reduced to various quantities using an averaging method. …

    Proceedings of the Annual Conference of JSAI JSAI2020(0), 3Rin465-3Rin465, 2020


  • Synthesis of <i>H<sub>∞</sub></i><i><sub> </sub></i>Controller based on Analytical Solution for Infinite Inertia Ratio in Disturbance Suppression Problem of Two-inertia System with High Inertia Ratio  [in Japanese]

    Iwamoto Shintaro , Kobayashi Yasuhide

    … <p>This paper proposes, for two-inertia system of low stiffness and high inertia ratio, a design method of a proportional controller that minimizes the closed-loop <i>H<sub>∞</sub></i><i><sub> … The controller is to generate the driving-side torque by using the driving- and driven-side angular velocities, and is composed of two proportional coefficients configured by a simple calculation law which explicitly depends on the physical parameters. …

    Transactions of the Institute of Systems, Control and Information Engineers 33(3), 87-94, 2020


  • Shear Capacity of RC Beams Based on Beam and Arch Actions

    Gunawan Devin , Okubo Kazumasa , Nakamura Takuro , Niwa Junichiro

    … <p>This study aims to propose a calculation method of shear capacity for RC beams based on the shear resisting mechanisms known as the beam and arch actions. … Based on these results, a new method to calculate the shear capacity of RC beams was proposed. … From the comparison of a total of 86 experimental and analytical results, the proposed method showed better accuracy to estimate the shear capacity of RC beams with stirrups.</p> …

    Journal of Advanced Concrete Technology 18(5), 241-255, 2020


  • Identification of Heat Transfer Coefficients and Simulation of Quenching Distortions on Disk Probe

    Kanamori Hideo , Ju Dong-Ying

    … <p>Oil quenching is an efficient heat treatment cooling method which can obtain a large cooling capacity by utilizing the boiling phenomenon. …

    MATERIALS TRANSACTIONS 61(5), 884-892, 2020



    MURAKAMI Kiyoshi , TAKEDA Koji , SATOH Ayumi , URANO Toshio

    … <p>In this study for the purpose of calculating the ultimate strength in flexure of RC beams with SFRC, a method for replacing the tensile stress distribution in the cross section with an equivalent stress block was proposed considering the scale effect of the tensile softening curve of SFRC, and the application validity of this method was examined by the flexural testing result of the beam specimen. …

    Cement Science and Concrete Technology 73(1), 318-324, 2020


  • Analytical Study on Turbulent Agglomeration in Turbulence Agglomerator

    Zheng Jianxiang , Li Yukai

    … The RMS (Root Mean Square) method used to obtain a kernel model suitable for turbulent agglomeration of coal-fired PM2.5. … When the fractal dimension is 2.5, it is suitable for the turbulent agglomeration of nonuniform structure, and the Brownian motion in the calculation of kernel function cannot be ignored. …



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