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Invited Lectures : Thln fllm Formation and anoparttcle Production by nsing Flash-boiling Spray
( Motohiro Oshimal ) 한국액체미립화학회 2012 한국액체미립화학회 학술강연회 논문집 Vol.2012 No.-
A method for controlling evaporation by using chemical vapor deposition (CVD) with a mixed solution, called “flashing spray CVD” is proposed. As for this method, a mixed solution is transported through an injector installed at the top of the vacuum CVD chamber. The solution is evaporated by flashing when its pressure is below the saturated pressure of the solution, leading to formation of a lean, homogeneous vapor. This homogeneous vapor is then reacted with oxygen to form a film. In this paper, we describe the research result about flashing spray CVD. The characteristics of the flashing spray were investigated at cvd ambient pressure by magnified photography and, LIF and Mie scattering. Tetraethoxysilane (TEOS) was used as the precursor, and the best low-boiling-point organic solvent was selected for mutual solubility of the low-boiling-point organic solvent and TEOS and to improve the vaporization characteristics of TEOS. The best injector shape for a particular injection condition was selected on the basis of vapor-formation speed and distribution by means of optical measurements. Homogeneous SiO2 films could be formed on 200-and 300-mm-diameter wafers by flashing spray CVD. And a novel method for forming nanoparticles by using a flash-boiling spray was also developed. This method applies flashing spray CVD to flame synthesis. We also describe TiO2 nanoparticles production by this method.
Brazier effect of single- and double-walled elastic tubes under pure bending
Motohiro Sato,Yuta Ishiwata 국제구조공학회 2015 Structural Engineering and Mechanics, An Int'l Jou Vol.53 No.1
The cross sections of hollow cylindrical tubes ovalise under a pure bending condition, and thisreduces their flexural stiffness as their curvatures increase. It is important to accurately evaluate this phenomenon, known as the „Brazier effect‟, to understand the bending behaviour of the systems considered. However, if the tubes are supported by an elastic medium or foundation, the ovalisation displacements of their cross sections may decrease. From this point of view, the purpose of this research is to analytically investigate the bending characteristics of single- and double-walled elastic tubes contacted by an elastic material by considering the Brazier effect. The Brazier moment, which is the maximum moment-carrying capacity of the ovalised cross section, can be calculated by introducing the strain energy per unit length of the tube in terms of the degree of ovalisation for the tube and the curvature. The total strain energy of the double-walled system is the sum of the strain energies of the outer and inner tubes and that of the compliant core. Results are comparatively presented to show the variation in the degree of ovalisation and the Brazier moment for single- and double-walled tubes.
Vision Based Pointing Device with Slight Body Movement
Motohiro Tanaka,Motoki Hara,Yoshitaka Morito,Taichi Sakamoto,Kazuya Miyamori,Shunji Moromugi,Takakazu Ishimatsu 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
It is widely acknowledged that computer is powerful tool to improve the quality of life of the people with disability. One problem is how the user manipulates the computer using suitable input device designed for him or her. This paper proposes tow pointing devices based on vision for the people with disability as input devices. These devices detect the position of the marks attached on the users head. According to the head movements, computer cursor on the computer display is moved in two-dimensionally. A distinct advantage of these devices is that various strategies could be installed based on the situation of the users. The pointing device was applied to a drawing tool of the painting software for an patients successfully.
Pay Innovations in Japan : Do They Lead to High Performance Organizations?
Motohiro Morishima 한국고용노사관계학회 2000 한국노사관계학회 정책세미나 Vol.2000 No.10
Japanese innovations in pay practices are most accurately described as a shift away from basing employee evaluation and rewards on seniority and ability development, to a practice of placing more emphasis on employees’ performance and output. As a result, new pay-for-practices including performance-based evaluation and management-by-objectives are being implemented in Japanese firms. Yet, we have surprisingly little knowledge about how this shift may affect organizational effectiveness. This study examines this issue by focusing on the effects of the changes in compensation and evaluation practices on workplace effectiveness. Workplace effectiveness is examined because of its critical role in influencing such important outcomes as employee motivation, skill development, fairness in employment relations and knowledge creation. The empirical results presented in this paper show that simple introduction of “pay-for-performance” practices may have serious implications for workplace and organizational effectiveness. More specifically, pay-for-performance practices in Japanese organizations are likely to have negative impacts on the effectiveness of Japanese high performance workplaces, unless these changes are also accompanied by a practice encouraging or requiring performance feedback, providing employees with their evaluation results and the reasons for these results. In conclusion, It is proposed that Japanese employers must introduce both performance-based compensation practices and performance feedback to obtain full benefits of these pay innovations.