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2D Droplet Size and Velocity Analysis of a Fan-Shaped Spray Using Ilids Method
( Masato Yamada ),( Chang Seong Ryu ),( Yasuo Moryoshi ),( Ryo Uchida ),( Masato Kubota ),( Masahide Takagi ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
DI (direct injection) systems have been studied to improve thermal efficiency of gasoline engines. The analysis of spray behavior is important to examine the combustion characteristics of DI gasoline engines because fuel-air mixture formation is controlled by spray characteristics and gas motion. In this study, the characteristics of a fan-shaped spray, such as the droplet size, its velocity and the droplet-size distribution were simultaneously measured on a 2D plane by using an improved ILIDS (Interferometric Laser Imaging for Droplet Sizing) method. As a result, interesting relationships between the droplets diameter and the velocity were found. In addition, numerical analysis of a fan-shaped spray was conducted and the results were compared to the measured results. In numerical analysis, the nozzle internal flow was predicted by using VOF (Volume of Fluid) model that can simulate the two-phase flow inside the nozzle to give the liquid film formation process outside the nozzle. Using the results of VOF model for the initial conditions, numerical analysis of the spray by DDM (Discrete Droplet Model) was carried out to examine the droplets breakup process. As a result, SMD has become small with going away from the nozzle center section that is the same tendency as the experiment.
中村政人(Masato Nakamura) 한국예술종합학교 미술원 조형연구소 2010 Visual Vol.7 No.-
Sustainable art project, ‘Himming’, has started in Himi-city, Toyama, since 2004. The creative process is steadily and slowly in progress to originate our own space by ourselves. Masato Nakamura has been producing a “social operating system” in this small town which has no art museums or galleries, working together with the town to achieve their new personality and the aspect.
Fault detection of shadow mask by use of image data processing
Masato Sakata,Hiroshi Kashiwagi 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
At the KACC'91 conference, we proposed a method of automatic detection of shape of the faulty holes of a shadow mask which is used in a cathoderay tube of a color television. In this method, the image data are taken from two areas of the mask with CCD camera. Comparing the shape of holes in these two areas by use of a signal processing technique, we can find any fault in the shape of holes. This paper describes the effect of smoothing filters of effectively finding the faulty holes from the difference image data. A computer simulation and actual experiment with a shadow mask have shown that this method of fault detection is very effective for practical use.
Supporting participation of Asia-Pacific SMEs in global value chains
Masato Abe,Marc Proksch 한국무역학회 2017 Journal of Korea trade Vol.21 No.2
Purpose – Global value chains (GVCs) have become increasingly influential in determining the patterns of international trade and foreign direct investment (FDI) and in providing growth opportunities in Asia and the Pacific while small- and medium-sized enterprises (SMEs) have been an engine of economic development. The purpose of this paper is to provide effective development strategies and relevant policy approaches to facilitate dynamic insertion of SMEs into GVCs. Design/methodology/approach – This paper was developed based on various Economic and Social Commission for Asia and the Pacific works in the fields of the development of SMEs and GVCs in Asia and the Pacific. Sectoral case studies on agribusiness, garment/apparel, automotive and electronics illustrate SMEs’ effective integration into GVCs. Findings – SMEs face multiple obstacles and challenges which may limit the benefits derived from the development of GVCs in Asia and the Pacific. Policymakers are suggested to design and implement appropriate strategies and polices in order to facilitate the development of SMEs under the ongoing globalization. Research limitations/implications – This paper is mainly based on existing policy papers which were developed by the United Nations Secretariat, its specialized agencies and others. Further empirical and policy studies are expected to be conducted in order to deepen the understanding of the present topics and to come up with practical policy options. Practical implications – Policymakers are suggested to consider strategies and policy options recommended by this paper for their works on SME development and trade and investment promotion. Originality/value – This is the first policy paper which proposes a comprehensive framework for SMEs’ effective participation in GVCs, specifically suggesting seven approaches, namely, SME development; trade policy; behind-the-border and cross-border trade facilitation; regional integration frameworks; FDI promotion; SME clusters; and national innovation system.