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Atomic Layer Epitaxy of Nitrogen-Doped ZnSe
TAKEMURA, YASUSHI,KONAGAI, MAKOTO,YAMASAKI, KANAME,LEE, C.H.,TAKAHASHI, KIYOSHI 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
Atomic layer epitaxy of nitrogen-doped ZnSe was studied. The ZnSe films were grown on GaAs(001) substrates at 250℃ with a continuous flow of nitrogen and alternate supplies of zinc and selenium. The grown films were characterized by photoluminescence spectra at 4.2K, and it was found that nitrogen was incorporated as a shallow acceptor in the films. The Schottky diodes were prepared by evaporation gold on the nitrogen-doped films grown on p-type GaAs substrates. A rectifying characteristic that was consistent with the structure, assuming p-type conductivity of ZnSe, was observed. Catacitance-voltage measurement of the structure also indicated p-type conductivity of the films.
Method of Determining Future Facility Location with Maintaining Present Accessibility
Wataru Takahagi,Yasushi Sumitani,Hirotaka Takahashi,Yuto Omae,Kazuki Sakai 대한산업공학회 2016 Industrial Engineeering & Management Systems Vol.15 No.3
The public services closely related to the daily lives of the Japanese people, such as firefighting, police or primary school education, are largely financed by the local governments. As the population as a whole in Japan declines, the population in local regions are forecasted to experience particularly rapid decline in the future, and it is inevitable to reduce the cost of public services provided by the local governments to keep their financial basis sustainable. In order to provide public services to the people properly and fairly, the local governments own and utilize their public facilities, such as fire stations, police stations or primary schools. On the other hand, we have to secure the accessibility, which is the condition of accessing a facility easily in a whole local city including the high population density area and low population density area. In this paper, we propose a method of determining the number of future facilities and its facility locations in which we maintain the present accessibility. In our proposed method, we determine them comparing the accessibility measurement calculated by facility location model using the present and future population. We adopted k-centdian model as the facility location model, which can secure the accessibility in a whole local city determining the weights of both areas. We applied our proposed method to fire station in Iwaki city, Japan. The results suggested that 7 facilities would be reduced in 2064, after 50 years from 2014. Additionally, we confirmed that the future facility location had securedaccessibility in both high and low population density area.
Utilization of L-camitine to Improve Cryo-Tolerance of Bovine Oocytes and Embryos
Tamas SOMFAI,Yasushi INABA,Toshikiyo TAKAHASHI,Vibuntita CHANKITISAKUL,Masahiro KANEDA,Satoshi AKAel,Shinya WATANABE,Seiki HARAGUCHI,Satoko MATOBA,Masaya GESHI,Takashi NAGAI 한국동물생명공학회(구 한국동물번식학회) 2012 발생공학 국제심포지엄 및 학술대회 Vol.2012 No.1
Method of Determining Future Facility Location with Maintaining Present Accessibility
Takahagi, Wataru,Sumitani, Yasushi,Takahashi, Hirotaka,Omae, Yuto,Sakai, Kazuki Korean Institute of Industrial Engineers 2016 Industrial Engineeering & Management Systems Vol.15 No.3
The public services closely related to the daily lives of the Japanese people, such as firefighting, police or primary school education, are largely financed by the local governments. As the population as a whole in Japan declines, the population in local regions are forecasted to experience particularly rapid decline in the future, and it is inevitable to reduce the cost of public services provided by the local governments to keep their financial basis sustainable. In order to provide public services to the people properly and fairly, the local governments own and utilize their public facilities, such as fire stations, police stations or primary schools. On the other hand, we have to secure the accessibility, which is the condition of accessing a facility easily in a whole local city including the high population density area and low population density area. In this paper, we propose a method of determining the number of future facilities and its facility locations in which we maintain the present accessibility. In our proposed method, we determine them comparing the accessibility measurement calculated by facility location model using the present and future population. We adopted k-centdian model as the facility location model, which can secure the accessibility in a whole local city determining the weights of both areas. We applied our proposed method to fire station in Iwaki city, Japan. The results suggested that 7 facilities would be reduced in 2064, after 50 years from 2014. Additionally, we confirmed that the future facility location had secured accessibility in both high and low population density area.