I put up a new paper “On Hydromagnetic Stresses in Weakly Magnetized Stellar Boundary Layers” on arXiv. Here is the abstract:
We examine the generation of hydromagnetic stresses and energy density in the boundary layer around a weakly magnetized star in the shearing-sheet approximation. This region, where the angular frequency is expected to increases […]
I just put up a new paper “Dynamics of Saturated Energy Condensation in Two-Dimensional Turbulence” on arXiv. Here is the abstract:
We derive and numerically confirm that the saturation of energy condensation in two-dimensional turbulence is governed by the balance between forcing and small-scale dissipation. The time scale of saturation is inversely proportional to […]
The Portable Batch System (PBS) and Load Sharing Facility (LSF) are popular job-schedulers for batch environments. Their goal is to manage computing jobs among the available computing resources. The figure on the right shows the current load of the Odyssey cluster at Harvard Research Computing. It demonstrates how computer jobs submitted […]
When working with LaTeX, it is recommended to start each sentence on a new line. The reasons can be found in Axel Brandenburg’s computing tips and this stack overflow page so I won’t repeat them here. However, as an emacs user, I always want emacs do the formatting for me.
The existing solutions […]
I am recently interested in the properties of Bose-Einstein condensation in two-dimension hydrodynamic turbulence. Without the Ekman term (linear friction), the time to reach a saturated state is proportional to the Reynolds number, which can be very long. Therefore, I want to improve my GPU code to use adaptive time stepping.
There are many ways to create secure password-less accesses to remote machines. The most commonly used method is ssh public key authentication. A less well known but more powerful method is Kerberos. Indeed, Kerberos is often used implicitly in Mac OS X.
Unfortunately, there are computer centers that think they know about security and 1) […]
I spent couple weeks implementing a simple 2D hydrodynamic code in CUDA C, which is a technology developed by nVidia. The code runs on the GPU instead of CPU. It uses Fourier spectral method with the 2/3 dealiasing rule and 4-th order Runge-Kutta integrator to solve the vorticity equation