Re: [gmx-users] Re: Average box size

2011-01-05 Thread Mark Abraham
On 01/06/11, Navjeet Ahalawat wrote: > Hi Tsjerk, > > Thanks for your more clarification, but when I am running the command > editconf -f pr.gro -o new_box.gro -density 1.04364e+03 (where pr.gro > is end.gro) the results I am getting are... > Please double check the contents of pr.gro are w

[gmx-users] Re: Average box size

2011-01-05 Thread Navjeet Ahalawat
Hi Tsjerk, Thanks for your more clarification, but when I am running the command editconf -f pr.gro -o new_box.gro -density 1.04364e+03 (where pr.gro is end.gro) the results I am getting are... Read 12348 atoms Volume: 97.5411 nm^3, corresponds to roughly 43800 electrons Velocities found syst

Re: [gmx-users] Query about use of coulombtype for LIE in gromacs

2011-01-05 Thread Mark Abraham
On 5/01/2011 7:55 PM, devawati dutta wrote: Dear Sir, Thanks for your prompt answer. In LIE method, if I will not use the PME for coulombtype, then what is suitable for it? In gromacs manual, there are several options under coulomb type.Which one I will select for coulombtype and

Re: Re: [gmx-users] Questions concerning Gromacs

2011-01-05 Thread wibke . sudholt
Dear Email Sender, Thank you very much for contacting me! Unfortunately, I am not available in the office at the moment and cannot respond to your email. I will be able to handle your request starting again Monday, January 10, 2011. For all questions about CloudBroker, please contact the compan

Re: [gmx-users] Questions concerning Gromacs

2011-01-05 Thread Mark Abraham
On 5/01/2011 9:09 PM, Thomas Koller wrote: Mark, thanks for your reply. The only problem are the improper dihedrals. I show you a example: [ dihedraltypes ] ;improper ftypephik(phi) mult ... A B C D 4 180 5.293 2 Sorry, I use ftype 4, not 2 :) The impropers are

Re: [gmx-users] problem running the demo

2011-01-05 Thread Justin A. Lemkul
Mao Mao wrote: Hi All, I am a new user of Gromacs and Linux. I am using Ubuntu 10.10 and installed Gromacs 4.5.3 following the instructions. When I ran the demo, I found that when I pressed , the xterm window which is supposed to appear separately just flashed and disappeared immediately.

Re: [gmx-users] Library file in.m2p not found

2011-01-05 Thread Mark Abraham
On 5/01/2011 8:38 PM, ahmet yıldırım wrote: Dear Mark, I am using the Gromacs on the Ubuntu for month buthave not encountered any problems. That's not the question I asked. If you're not using GMXRC properly, or doing its work yourself by hand, you will run into problems eventually. I did

[gmx-users] problem running the demo

2011-01-05 Thread Mao Mao
Hi All, I am a new user of Gromacs and Linux. I am using Ubuntu 10.10 and installed Gromacs 4.5.3 following the instructions. When I ran the demo, I found that when I pressed , the xterm window which is supposed to appear separately just flashed and disappeared immediately. For instance, "the outpu

Re: [gmx-users] Constraints and efficency

2011-01-05 Thread David van der Spoel
On 2011-01-05 21.44, Elton Carvalho wrote: On Tue, Jan 4, 2011 at 7:38 PM, Mark Abraham wrote: On 5/01/2011 5:53 AM, Elton Carvalho wrote: [...] Does the larger timestep allowed by eliminating high-frequency O-H vibrations outweigh the time needed by SETTLE? Most definitely. Typical GROMACS

Re: [gmx-users] Constraints and efficency

2011-01-05 Thread Elton Carvalho
On Tue, Jan 4, 2011 at 7:38 PM, Mark Abraham wrote: > On 5/01/2011 5:53 AM, Elton Carvalho wrote: >> [...] Does the larger timestep allowed by eliminating >> high-frequency O-H vibrations outweigh the time needed by SETTLE? > > Most definitely. Typical GROMACS simulations report up to a few percen

Re: [gmx-users] Sampling windows

2011-01-05 Thread XAvier Periole
On Jan 5, 2011, at 6:03 PM, Gavin Melaugh wrote: Hi Xavier Many thanks. Two more quick questions (both refering to barrier region): Does the value of the force constant affect the height of the barrier providing that there is reasonable overlap? No! The force constant used does not affect t

Re: [gmx-users] Sampling windows

2011-01-05 Thread Gavin Melaugh
Hi Xavier Many thanks. Two more quick questions (both refering to barrier region): Does the value of the force constant affect the height of the barrier providing that there is reasonable overlap? Obviously there is a compromise between the size of the constant and the number of windows. If I incr

Re: [gmx-users] Sampling windows

2011-01-05 Thread XAvier Periole
On Jan 5, 2011, at 5:01 PM, Gavin Melaugh wrote: Hi Xavier Many thanks for the reply. When I compare the two curves Curve 1) lack of overlap in barrier region; force constant = 1000 Curve 2) with increased number of sampling windows with increased force constant (note I have only increased

Re: [gmx-users] Sampling windows

2011-01-05 Thread Gavin Melaugh
Hi Xavier Many thanks for the reply. When I compare the two curves Curve 1) lack of overlap in barrier region; force constant = 1000 Curve 2) with increased number of sampling windows with increased force constant (note I have only increased the force constant of the windows in the barrier region)

Re: [gmx-users] md simulation for ternary complex

2011-01-05 Thread Justin A. Lemkul
kala wrote: Dear All, I am planning to perform a simulation of a protein ternary complex with 2 ligands and Zn molecule. The protein has 2 chains with 430aa.Is it possible to do simulation for the protein complex. I have got sufficient hardware configuration for the dynamics study. As am ne

[gmx-users] md simulation for ternary complex

2011-01-05 Thread kala
Dear All, I am planning to perform a simulation of a protein ternary complex with 2 ligands and Zn molecule. The protein has 2 chains with 430aa.Is it possible to do simulation for the protein complex. I have got sufficient hardware configuration for the dynamics study. As am new to perform such c

Re: [gmx-users] Sampling windows

2011-01-05 Thread XAvier Periole
On Jan 5, 2011, at 4:08 PM, Gavin Melaugh wrote: Dear all I have generated a PMF curve for introducing a guest molecule into a host molecule using the umbrella sampling method. The curve seems fine, but there are no overlaps between histograms in the barrier region. To circumvent this I hav

[gmx-users] Sampling windows

2011-01-05 Thread Gavin Melaugh
Dear all I have generated a PMF curve for introducing a guest molecule into a host molecule using the umbrella sampling method. The curve seems fine, but there are no overlaps between histograms in the barrier region. To circumvent this I have added more windows in this region and to ensure sampli

[gmx-users] g_msd Utility - (Unexpected) Different Results Depending on Output Flag

2011-01-05 Thread Solomon Berman
Greetings friends! I have a question this morning about the g_msd utility related to the output generated by different flags. I'm working with an LJ Liquid and am trying to determine the diffusion constant for the system. I'm employing both the Einstein formulation and the Green Kubo formula.

Re: [gmx-users] How to include FE2+ in ions.itp ?

2011-01-05 Thread Justin A. Lemkul
Tanos Franca wrote: Dear GROMACS users, We're trying to perform a MD simulation of a system with a hematin group but realized that GROMACS does not have parameters for the ion FE2+. We tried to include the parametrs in the file ions.itp but did not suceed yet. Does anybody knows the

[gmx-users] How to include FE2+ in ions.itp ?

2011-01-05 Thread Tanos Franca
Dear GROMACS users, We're trying to perform a MD simulation of a system with a hematin group but realized that GROMACS does not have parameters for the ion FE2+. We tried to include the parametrs in the file ions.itp but did not suceed yet. Does anybody knows the right procedure to intr

[gmx-users] gromacs on Lynnfield processors

2011-01-05 Thread Guilherme Menegon Arantes
Hi folks, Does anyone have timings/benchmarks for GMX running on Intel processors codename Lynnfield, like Xeon X34??, Core i7 8?? or yet Core i5 7?? . I am looking for both 1-node multi(4)-thread runs as well as multi-node MPI runs. In particular, I am wondering how the cheaper but slower DMI c

Re: [gmx-users] HFIP solvent box...

2011-01-05 Thread Justin A. Lemkul
sharada wrote: Hello everybody, Wish you a happy new year 2011. I need to simulate a peptide in HFIP ( hexafluoro-propanol) solvent. As I was browsing I came across a reprint in J.Phys.Chem.B 2001 titled */'Model of 1,1,1,3,3,3-Hexafluoro-propan-2-ol for Molecular Dynamics Simulations'/*

[gmx-users] HFIP solvent box...

2011-01-05 Thread sharada
Hello everybody, Wish you a happy new year 2011. I need to simulate a peptide in HFIP ( hexafluoro-propanol) solvent. As I was browsing I came across a reprint in J.Phys.Chem.B 2001 titled 'Model of 1,1,1,3,3,3-Hexafluoro-propan-2-ol for Molecular Dynamics Simulations' published from Gro

Re: [gmx-users] Library file in.m2p not found

2011-01-05 Thread ahmet yıldırım
Dear Justin and Mark, Problem solved.Thanks for your helps I copied to the directory /usr/share/gromacs/top it (in.m2p). r...@ubuntu:/home/ab/Desktop# cp in.m2p /usr/share/gromacs/top 05 Ocak 2011 13:45 tarihinde Justin A. Lemkul yazdı: > > > ahmet yıldırım wrote: > >> Dear Mark, >> >> I am us

[gmx-users] Warning about (short) potential interruption - moving DNS servers for gromacs.org

2011-01-05 Thread Erik Lindahl
Hi, We're in the process of transferring the domain name to a more convenient registrar, and this will also require us to change DNS servers. Thus, you might experience short interruptions in name resolutions for *.gromacs.org next week! Cheers, Erik-- gmx-users mailing listgmx-users@groma

Re: [gmx-users] Library file in.m2p not found

2011-01-05 Thread Justin A. Lemkul
ahmet yıldırım wrote: Dear Mark, I am using the Gromacs on the Ubuntu for month but have not encountered any problems.I did a search in the file system of Ubuntu. I do not have a GMXLIB folder in a file system. What should I do? If you're telling xpm2ps to use in.m2p, that file has to e

[gmx-users] Questions concerning Gromacs

2011-01-05 Thread Thomas Koller
Mark, thanks for your reply. The only problem are the improper dihedrals. I show you a example: [ dihedraltypes ] ;improper ftypephik(phi) mult ... A B C D 4 180 5.293 2 Sorry, I use ftype 4, not 2 :) The impropers are listed in the dihedraltypes. The sequence is

Re: [gmx-users] Library file in.m2p not found

2011-01-05 Thread ahmet yıldırım
Dear Mark, I am using the Gromacs on the Ubuntu for month but have not encountered any problems.I did a search in the file system of Ubuntu. I do not have a GMXLIB folder in a file system. What should I do? 05 Ocak 2011 10:42 tarihinde Mark Abraham yazdı: > On 5/01/2011 7:37 PM, ahmet yıldırım

[gmx-users] Query about use of coulombtype for LIE in gromacs

2011-01-05 Thread devawati dutta
Dear Sir, Thanks for your prompt answer. In LIE method, if I will not use the PME for coulombtype, then what is suitable for it? In gromacs manual, there are several options under coulomb type.Which one I will select for coulombtype and Vdwtype in .mdp file? Your's sincerely Devawati

Re: [gmx-users] Library file in.m2p not found

2011-01-05 Thread Mark Abraham
On 5/01/2011 7:37 PM, ahmet yıldırım wrote: Dear users, I receive the following error when I entered the command "xpm2ps -f ss.xpm -o ss.eps -di in.m2p" Fatal error: Library file in.m2p not found in current dir nor in default directories. (You can set the directories to search with the GMXLIB

[gmx-users] Library file in.m2p not found

2011-01-05 Thread ahmet yıldırım
Dear users, I receive the following error when I entered the command "xpm2ps -f ss.xpm -o ss.eps -di in.m2p" Fatal error: Library file in.m2p not found in current dir nor in default directories. (You can set the directories to search with the GMXLIB path variable) I am using the Gromacs 4.05 on t

Re: [gmx-users] nanoparticles

2011-01-05 Thread Mark Abraham
On 5/01/2011 7:26 PM, leila separdar wrote: I want to simulate nanoparticles and I want to know if it is possible to simulate nanoparticles by Gromacs or not? and if yes how can I simulate a nanoparticle. It's simple to say that it can be done, but it is not a kind of simulation that GROMACS

Re: [gmx-users] Questions concerning Gromacs

2011-01-05 Thread Mark Abraham
On 5/01/2011 6:14 PM, Thomas Koller wrote: Hello, I have some questions concerning the implementation in Gromacs: 1) I want to model a rigid anion of an IL (fixed bonds and angles). The cation is flexible. How can I do that without using constraint types? With LINCS or SHAKE, I can only fix,

[gmx-users] nanoparticles

2011-01-05 Thread leila separdar
I want to simulate nanoparticles and I want to know if it is possible to simulate nanoparticles by Gromacs or not? and if yes how can I simulate a nanoparticle. thanks -- gmx-users mailing listgmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users Please search the archive a