Titlebook: Highlights of Astronomy Volume 11B; As Presented at the J. Andersen (General Secretary of the Union) Book 1998 International Astronomical

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International Astronomical Union Highlightshttp://image.papertrans.cn/h/image/427008.jpg

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2352-3328 eries, .Highlights of Astronomy.. The presentVolume 11 presents the major scientific presentations made at theXXIIIrd General Assembly, August 18-30, 1997, in Kyoto, Japan.The two volumes (11A+B) contain the texts of the three InvitedDiscourses as well as the proceedings or extended summaries of the

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Grape-6een particles. The improvement of the speed will mainly come from the advance in the silicon semiconductor technology. GRAPE-6 will enable us to directly simulate the evolution of star clusters with up to 1 million stars.

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Grape-4: A Teraflops Machine for ,-Body Simulationss. It has a hardware for prediction of positions and velocities, which is used for the individual timestep scheme. We integrated 1692 chips of 640 megaflops performance to achieve the peak speed of 1.08 teraflops.