A flow-cell-type portable laser particle counter was developed for in-situ counting of process-induced particles. We measured process-induced particles when small amounts of moisture and oxygen were intentionally added to SiH 4 diluted to 10% in argon gas. It was found that there existed a threshold concentration for particle generation caused by the reaction between SiH 4 and moisture/oxygen; i.e., the number of particles was not linearly proportional to the moisture and oxygen concentrations. We also found that the size distribution of generated particles varied due to complex mechanisms such as coagulation of small particles.

Particle (ecology)

10.1143/jjap.31.918

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Monte Carlo Simulations of a Model of Oblong surfaces

The proceedings of the JSME annual meeting (2004)

Hiroshi Koibuchi Jion SASAKI Minori KUROIWA Keisuke Shinohara

10.1299/jsmemecjo.2004.2.0_197

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0504 Characteristics of Electrostatic Micro Particle Mixing and Transportation within Reactive Gas in a Tube

Ryuutai Kougaku Bumon Kouenkai kouen rombunshuu/Ryutai Kogaku Bumon Koenkai koen ronbunshu (2010)

Keisuke Shinohara Hidemasa Takana Hideya Nishiyama

The innovative technology is proposed for micro particle mixing and transportation in a tube by electrostatic force and by induced flow with dielectric barrier discharge. The tube, so called DBD plasma tube, is composed of a pair of spiral electrodes both inside and outside of the tube for the generation of DBD plasma on the inner surface of a tube. The fundamental characteristics of DBD plasma tube such as discharge characteristics, induced flow velocity and ozone concentration were clarified experimentally. Furthermore, three dimensional potential distribution inside the tube was shown by computational simulation.

Particle (ecology)

10.1299/jsmefed.2010.165

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Development of Estimation Method for Learner’s Emotional Concealment During Learning Using Biometric Information and Feedback Model

International Conference on Computers in Education (2023)

Keisuke Shinohara Keiichi Muramatsu Tatsunori Matsui

Although it is important to understand learners’ emotional situations in teaching and learning processes, learners sometimes do not express negative emotions intentionally. This study has termed this intentional non-expression of negative emotions “emotional concealment,” and examined its estimation from learners’ biometric information. In particular, we focused on learners’ facial features, and attempted to clarify their relationship with emotional concealment. Using these results, we attempted to quantify emotional concealment from the time-series data of biometric information and detect it as an outlier. Additionally, we attempted to develop a feedback generation system to inform teachers about emotional concealment.

10.58459/icce.2023.956

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In-situ Counting of Process-Induced Particle

Extended Abstracts of the 2020 International Conference on Solid State Devices and Materials (1991)

Kaoru Kondo Kazuo Ichijo Keisuke Shinohara Tamio Hoshina Kazuo Tsubouchi

Particle (ecology)

Counting process

10.7567/ssdm.1991.pb7-2

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Analysis of diffraction phenomena generated by the wings of Graphium sarpedon

The Japan Society of Applied Physics (2021)

Toshihiro Nonaka Shota Amano Keisuke Shinohara Takahiko Ban S.-I. Yamamoto

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Development of Hybrid Active Magnetic Bearing Type Combined Motor-Bearing.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C (2000)

Keisuke Shinohara Tetsuo Ohishi Satoshi Ueno Hideki Kanebako Yohji OKADA

A new type of combined motor-bearing is proposed. It is intended for a rotor to have two functions of rotary motor and radial magnetic bearing. In the previous works, P±2 pole algorithm has been proposed to realize combined motor-bearing function. But the construction and the control system was complicated. In this paper, hybird active magnetic bearing(HB AMB)type combined motor-bearing is proposed with used DC magnetic flux to control radial force. The structure is the combination of hybrid type magnetic bearing and PM type AC motor. First, the fundamental operation of the proposed hybrid AMB type combined motor-bearing is explained. Then the minimum pole number that realizes the independent control of levitation and rotation is derived theoretically. Finally, the experimental setup is made to confirm the capability of the proposed motor. The results show high stability and strong rotating torque of the proposed motor-bearing.

Magnetic bearing

Magnetic Levitation

10.1299/kikaic.66.503

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Fast visible 2-D camera imaging on NSTX

Bulletin of the American Physical Society (2005)

A. L. Roquemore R. Kiata David Darrow S. Zweben T. Gray

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