SAKAMOTO Shin-ichi



Associate Professor

Research Fields, Keywords

Ultrasonic electoronics, Thermoacoustic

Mail Address

E-mail address

Campus Career 【 display / non-display

  • University of Shiga Prefecture  School of Engineering  Department of Electronic Systems Engineering  Associate Professor   2008.04 - Now

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Computational science

  • Thermal engineering

  • Measurement engineering

  • Energy engineering

  • Environmental engineering and reduction of environmental burden


Papers 【 display / non-display

  • A quantitative method to measure skin thickness in leg edema in pregnant women using B-scan portable ultrasonography: A comparison between obese and non-obese women

    Yanagisawa N., Koshiyama M., Watanabe Y., Sato S., Sakamoto S.

    Medical Science Monitor  Medical Science Monitor  25   1 - 9  2019.01

    10.12659/MSM.911799  Joint Work  


    © Med Sci Monit, 2019. Background: This study aimed to use a portable ultrasound method to quantitatively measure skin thickness and to compare leg edema in obese and non-obese pregnant women. Material/Methods: Thirty-six pregnant women (17 primiparas and 19 multiparas) at 27/28 and 37/38 weeks of pregnancy, with and without leg edema, had their lower leg skin thickness measured using a B-scan portable ultrasonography device (72 legs and maximum of 98 measurements). Measurements were compared between women who were obese prior to pregnancy, with a body mass index (BMI) ≥25 kg/m 2 and non-obese with a BMI <25 kg/m 2 . Results: Skin thickness of the legs in pregnant women with edema was significantly increased compared with that in pregnant women without edema (6.4±0.3 mm vs. 4.6±0.4 mm) (p=0.0001). There was a significant correlation between the degree of pitting edema and skin thickness in all edematous legs (r=0.56; n=98; p<0.0001). The cutoff level of edema measured by portable ultrasound in non-obese pregnant women was 4.7 mm (sensitivity 83.9%, specificity 66.7%) and was 7.5 mm in obese pregnant women. Obese pregnant women with edema had a significantly increased leg skin thickness compared with non-obese pregnant women with edema (11.3±1.3 mm vs. 5.7±0.2 mm) (p<0.0001). Conclusions: Portable ultrasonography is a reliable method of quantitatively measuring skin thickness of the lower leg in edema associated with pregnancy. The thickness of the skin in obese pregnant women with edema can be expected to be significantly increased compared with non-obese pregnant women with edema.

  • Fabrication and characterization of Cu2O, ZnO and ITO thin films toward oxide thin film solar cell by mist chemical vapor deposition method

    Takumi Ikenoue, Shin-ichi Sakamoto and Yoshitaka Inui

     Physica Status Solidi  11 (7-8)   1237 - 1239  2014.07

    10.1002/pssc.201300638  Joint Work  Joint(The vice charge)

  • Numerical analysis of the effect of local diameter reduction on the critical temperature of thermoacoustic oscillations in a looped tube

    Yuichiro Orino, Shin-ichi Sakamoto, Yoshitaka Inui, Takumi Ikenoue and Yoshiaki Watanabe

     Jpn. J. Appl. Phys   5307KE13 -  2014.07

    Joint Work  Joint(The vice charge)

  • Fabrication and characteristics of p-type Cu2O thin films by ultrasonic spray-assisted mist CVD method

    Takumi Ikenoue, Shin-ichi Sakamoto, and Yoshitaka Inui

     Japanese Journal of Applied Physics  53 (5S1)   -  2014.05

    10.7567/JJAP.53.05FF06  Joint Work  Joint(The vice charge)

  • Fundamental Study of a Loop-Tube-Type Thermoacoustic Heating System

    S. Sakamoto, and Y. Watanabe

     Journal of Energy and Power Engineering   2096 - 2099  2013.11

    Joint Work  Joint(The main charge)

  • Multistage Stack with Multiple Pore Radii Applying the Temperature Gradient to a Thermoacoustic Engine

    K. Yanagimoto, S. Sakamoto, Y. Nakano, K Kuroda, and Y. Watanabe

     Journal of Energy and Power Engineering   1440 - 1447  2013.08

    Joint Work  Joint(The vice charge)

  • Relationship between Quality Value and Temperature Ratio for Step-Shape Thermoacoustic System",

    K. Shibata, S. Sakamoto, Y. Nakano, and Y. Watanabe,

     Jpn. J. Appl. Phy.  (07HE06)    2013.07

    Joint Work  Joint(The vice charge)

  • Study on thermoacoustic system to drive by low temperature -Effects of loop-tube thermoacoustic system connected with parallel double stacks on the onset temperature ratio

    Y. Nakano, S. Sakamoto, and Y. Watanabe

     International Conference on Acoustics 2013    2013.06

    Joint Work  Joint(The vice charge)

  • Introduction of conical phase adjuster for thermoacoustic system

    S. Sakamoto, M. Inoue, Y. Nakano, Y. Orino, Y. Inui, T. Ikenoue, and Y. Watanabe

     International Conference on Acoustics 2013    2013.06

    Joint Work  Joint(The main charge)

  • The effect of resonance mode control by expanding of cross-section area on cooling capacity in a loop-tube type thermoacoustic cooling system 

    M. Inoue, S. Sakamoto, Y. Nakano, and Y. Watanabe,

     International Conference on Acoustics 2013    2013.06

    Joint Work  Joint(The vice charge)

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Conferences 【 display / non-display

  • 超小型熱音響発電システムの実現に向けて -50 mm 熱音響プライムムーバーの試作-

    第17回関西支部若手研究者交流研究発表会  2014.12

  • フェーズアジャスターの長さ変化が熱音響システムの音場に与える影響について

    第35回超音波エレクトロニクスの基礎と応用に関するシンポジウム  2014.12

  • 3Dプリンタを用いた熱音響変換素子の造形の試み

    第35回超音波エレクトロニクスの基礎と応用に関するシンポジウム  2014.12

  • Basic study on inset position of stack in the system with branch tubes for applying thermoacoustic silencer to multi cylinder engine muffler

    inter.noise2014  2014.11

  • A prototype of step-shaped-type miniature thermoacoustic prime mover -A basic study of the influence of the installation position of the stack-

    7th Forum Acusticum 2014  2014.09

  • 熱音響システムにおける変換素子の微細孔の形状が音場に与える影響

    日本音響学会2014年秋季研究発表会  2014.09