Distributed N-body Simulation on the Grid Using Dedicated Hardware (2007)
Groen, Derek, Zwart, Simon Portegies, McMillan, Steve, Makino, Jun
We present performance measurements of direct gravitational N -body simulation on the grid, with and without specialized (GRAPE-6) hardware. Our inter-continental virtual organization consists of...
The core radius of a star cluster containing a massive black hole (2006)
Heggie, Douglas C., Hut, Piet, Mineshige, Shin, Makino, Jun, Baumgardt, Holger
(Simplified) We present a theoretical framework which establishes how the core radius of a star cluster varies with the mass of an assumed central black hole. Our result is that the ratio of core to...
Zwart, Simon Portegies, McMillan, Steve, Makino, Jun
We study the first 100Myr of the evolution of isolated star clusters initially containing 144179 stars, including 13107 (10%) primordial hard binaries. Our calculations include the effects of both...
A New Time-Symmetric Block Time-Step Algorithm for N-Body Simulations (2005)
Kaplan, Murat, Saygin, Hasan, Hut, Piet, Makino, Jun
Time-symmetric integration schemes share with symplectic schemes the property that their energy errors show a much better behavior than is the case for generic integration schemes. Allowing adaptive...
A quantitative analysis of the acidosis of cardiac arrest: a prospective observational study (2005)
Makino, Jun, Uchino, Shigehiko, Morimatsu, Hiroshi, Bellomo, Rinaldo
Abstract Introduction Metabolic acidosis is common in patients with cardiac arrest and is conventionally considered to be essentially due to hyperlactatemia. However, hyperlactatemia alone fails to...
Dynamics of Intermediate Mass Black Holes in Star Clusters (2004)
Baumgardt, Holger, Zwart, Simon Portegies, McMillan, Steve, Makino, Jun, Ebisuzaki, Toshikazu
We have followed the evolution of multi-mass star clusters containing massive central black holes by N-body simulations on the GRAPE6 computers of Tokyo University. We find a strong cluster expansion...
Star cluster ecology V: Dissection of an open star cluster--spectroscopy (2003)
Zwart, Simon Portegies, Hut, Piet, McMillan, Steve, Makino, Jun
We have modeled in detail the evolution of rich open star clusters such as the Pleiades, Praesepe and Hyades, using simulations that include stellar dynamics as well as the effects of stellar...
Theory in a Virtual Observatory (2001)
Teuben, Peter, DeYoung, Dave, Hut, Piet, Levy, Stuart, Makino, Jun, McMillan, Steve, ...
During the last couple of years, observers have started to make plans for a Virtual Observatory, as a federation of existing data bases, connected through levels of software that enable rapid...
Immersive 4D Interactive Visualization of Large-Scale Simulations (2001)
Teuben, Peter, Hut, Piet, Levy, Stuart, Makino, Jun, McMillan, Steve, Zwart, Simon Portegies, ...
In dense clusters a bewildering variety of interactions between stars can be observed, ranging from simple encounters to collisions and other mass-transfer encounters. With faster and special-purpose...
Astrophysics on the GRAPE Family of Special Purpose Computers (1998)
The GRAPE-4, the world's fastest computer in 1995-1997, has produced some major scientific results, through a wide diversity of large-scale simulations in astrophysics. Applications have ranged from...
High-Performance Special-Purpose Computers in Science (1998)
Fukushige, Toshiyuki, Hut, Piet, Makino, Jun
The next decade will be an exciting time for computational physicists. After 50 years of being forced to use standardized commercial equipment, it will finally become relatively straightforward to...
Smooth Particle Hydrodynamics: Models, Applications, and Enabling Technologies (1997)
Hut, Piet, Hernquist, Lars, Lake, George, Makino, Jun, McMillan, Steve, Sterling, Thomas
We present the results from a two-day study in which we discussed various implementations of Smooth Particle Hydrodynamics (SPH), one of the leading methods used across a variety of areas of...