http://hdl.handle.net/10098/2656 2013-05-23T09:11:51Z http://hdl.handle.net/10098/6449 タイトル: Initial condition problem for cosmological N-body simulations 著者: TATEKAWA, Takayuki 2009-10-01T00:00:00Z http://hdl.handle.net/10098/6448 タイトル: Phase transition in d-dimensional long-range interacting systems 著者: TATEKAWA, Takayuki 2007-02-01T00:00:00Z http://hdl.handle.net/10098/6447 タイトル: A Portable Grid-Enabled Computing System for A Nuclear Material Study 著者: TSUJITA, Yuichi; ARIMA, Tatsumi; TATEKAWA, Takayuki; SUZUKI, Yoshio 抄録: We have built a portable grid-enabled computing system specialized for our molecular dynamics (MD) simulation program to study Pu material easily. Experimental approach to reveal properties of Pu materials is often accompanied by some difficulties such as radiotoxicity of actinides. Since a computational approach reveals new aspects to researchers without such radioactive facilities, we address an MD computation. In order to have more realistic results about e.g., melting point or thermal conductivity, we need a large scale of parallel computations. Most of application users who don’t have supercomputers in their institutes should use a remote supercomputer. For such users, we have developed the portable and secured grid-enabled computing system to utilize a grid computing infrastructure provided by ITBL (Information Technology Based Laboratory). This system enables us to access remote supercomputers in the ITBL system seamlessly from a client PC through its graphical user interface (GUI). Typically it enables seamless file accesses on the GUI. Furthermore monitoring of standard output or standard error is available to see progress of an executed program. Since the system provides fruitful functionalities which are useful for parallel computing on a remote supercomputer, researchers can concentrate on their researches. 2010-10-01T00:00:00Z http://hdl.handle.net/10098/6446 タイトル: Development of an International Matrix-Solver Prediction System on a French-Japanese International Grid Computing Environment 著者: SUZUKI, Yoshio; KUSHIDA, Noriyuki; TATEKAWA, Takayuki; TESHIMA, Naoya; CANIOU, Yves; GUIVARCH, Ronan; DAYDE, Michel; RAMET, Pierre 抄録: The "Research and Development of International Matrix-Solver Prediction System (REDIMPS)" project aimed at improving the TLSE sparse linear algebra expert website by establishing an international grid computing environment between Japan and France. To help users in identifying the best solver or sparse linear algebra tool for their problems, we have developed an interoperable environment between French and Japanese grid infrastructures (respectively managed by DIET and AEGIS). Two main issues were considered. The first issue is how to submit a job from DIET to AEGIS. The second issue is how to bridge the difference of security between DIET and AEGIS. To overcome these issues, we developed APIs to communicate between different grid infrastructures by improving the client API of AEGIS. By developing a SeD (server deamon program) of DIET which behaves like an AEGIS user, DIET can call functions in AEGIS: authentication, file transfer, job submission, and so on. To intensify the security, we also developed functionalities to authenticate DIET sites and DIET users in order to access AEGIS computing resources. By this study, the set of software and computers available within TLSE to find an appropriate solver is enlarged over France (DIET) and Japan (AEGIS). 2010-10-01T00:00:00Z