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Satoshi Mikoshiba,Shinji Murai,Hiroyasu Sumino,Takashi Kado,Daisuke Kosugi,Shuzi Hayase 한국물리학회 2005 Current Applied Physics Vol.5 No.2
Increases in photovoltaic performances for dye-sensitized solar cells having ionic liquid type electrolytes are reported. These re-sults are explained by diusion coecient for I3. , charge transfer resistances on counter electrodes, at band potentials of TiO2,redox potentials for I. /I3. , electron diusion constants, electron life time, and diusion length in TiO2 layers. Methylpropylimid-azolium iodide is selected because of the lowest viscosity and the highest conductivity. Increases in the photovoltaic performance areobserved when a small amount of water was added into the ionic liquid consisting of both LiI andt-butylpyridine as the additives.These improvements are brought about by enhancements of all ofJsc, andVoc. The increases inJscand are associated with thedecrease in charge transfer resistances on counter electrodes and increases in ionic conductivities.Voc may be explained by an in-crease in the dierence between redox potentials of I. /I3. and Fermi level..
A Simulation Tool for Service Visualization and Service Evaluation
Takeshi Tateyama,Satoshi Mikoshiba,Ryosuke Chiba,Kentaro Watanabe,Yoshiki Shimomura,Seiichi Kawata (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
One of the main problems in service engineering which is a new academic fields is how to evaluate complex services designed based on he concept of service engineering. Though service flow simulation is promising and necessary to evaluate complex services, there are few effective software tools to simulate and evaluate services. In this paper, the authors propose a service flow simulation method using scene transition nets (STN) that is a graphic modeling and simulation method for discrete-continuous hybrid systems. This method visualizes discrete flows of services and temporal changes in the values of customer satisfaction and various other variables of service models. The experimental results of simulation of an online DVD rental service have showed the availability of our method.