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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dear all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I would like to change a specific atom into a ghost particle
(no interaction with system) after some time (for example, 1ns).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Is there any way to implement it in GROMACS?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If I need change the code, what file do I have to look at?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I would deeply appreciate any comments.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Jae H. Park<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceName w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>Jae</span></font></st1:PlaceName><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> <st1:PlaceName
w:st="on">Hyun</st1:PlaceName> <st1:PlaceType w:st="on">Park</st1:PlaceType></span></font></st1:place><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>, Ph.D.<br>
Physics Division<br>
<st1:City w:st="on"><st1:place w:st="on">Oak Ridge</st1:place></st1:City>
National Laboratory<br>
<st1:address w:st="on"><st1:Street w:st="on">P.O. Box</st1:Street> 2008</st1:address>,
MS-6372<br>
<st1:place w:st="on"><st1:City w:st="on">Oak Ridge</st1:City>, <st1:State
w:st="on">TN</st1:State> <st1:PostalCode w:st="on">37831</st1:PostalCode></st1:place></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Phone (865) 241-1482</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>E-mail parkj@ornl.gov</span></font><o:p></o:p></p>
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12.0pt'><o:p> </o:p></span></font></p>
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