[gmx-users] gmx-users@gromacs.org

2008-11-26 Thread H.J.Risselada
Finally had a look through the gromacs 4.0 source code. Don't know if this bug/points already have been reported and changed in 4.0.2: 1) There is never memory allocated for the pointers to the user defined groups: mdatoms->cU1 etc. These pointers will stay NULL when a user defined group i

Re: [gmx-users] Re: abnormal flip-flop when embedding cholesterol into DOPC using CG

2007-12-06 Thread H.J.Risselada
Dear Ran, Indeed, strictly speaking a smaller time step will give you a more precise intergration over phase-space. However, as the CG-model itself and theirfore its corresponding energy description are parametrized for only a certain range in time steps. The extra details which one gains wit

Re: [gmx-users] on NVE and pressure

2007-04-16 Thread H.J.Risselada
On Mon, 16 Apr 2007 09:40:58 +0200 lorix <[EMAIL PROTECTED]> wrote: Hi everybody, I am simulating a protein (approximately 5000 atoms) in water (35000 atoms). The protein is out of a thermodynamic equilibrium because I modified a crystallographic structure of one of its conformation (which

Re: [gmx-users] hessian_matrix_from_ordered_trajectory

2007-04-05 Thread H.J.Risselada
On Thu, 5 Apr 2007 18:53:58 +0200 Sang-Min Park <[EMAIL PROTECTED]> wrote: Dear all, I calculated the eigenvalues and eigenvectors from a small peptide with a closest water neighboorhood watersurrounding. To do this I generated a new trajectory with the command "trjorder" to order the wat

Re: [gmx-users] Re: Can I run BD in water media using Gmx? (H.J.Risselada)

2007-01-10 Thread H.J.Risselada
On Thu, 11 Jan 2007 09:50:12 +0800 "Hu Zhongqiao" <[EMAIL PROTECTED]> wrote: Thanks, Mark and Jelger, To Jelger, But If one can run BD by setting integrator=sd, how is dielectri constant of water set in the simulation? On p141 of the Manual v3.3, there is one option epsilon_r. Does it mean

Re: [gmx-users] Re: Can I run BD in water media using Gmx? (Hu Zhongqiao)

2007-01-10 Thread H.J.Risselada
On Wed, 10 Jan 2007 17:36:10 +1100 Mark Abraham <[EMAIL PROTECTED]> wrote: Hu Zhongqiao wrote: Hi, Nobody implied me till now. So that means the current version can not do BD by implicitly treating water into continuum media, i.e, use of dielectric constant of water. I hope Gmx developers