--- branches/development/src/flucq/FluctuatingChargeParameters.cpp	2012/05/31 12:25:30	1731
+++ trunk/src/flucq/FluctuatingChargeParameters.cpp	2013/07/19 21:25:45	1908
@@ -35,7 +35,7 @@
  *                                                                      
  * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
  * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
- * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
+ * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).          
  * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
  * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
  */
@@ -54,6 +54,8 @@ namespace OpenMD {
     DefineOptionalParameterWithDefaultValue(MaxIterations, "maxIterations", 100);    
     DefineOptionalParameterWithDefaultValue(TargetTemp, "targetTemp", 1.0e-6);
     DefineOptionalParameterWithDefaultValue(TauThermostat, "tauThermostat", 10.0);
+    DefineOptionalParameterWithDefaultValue(DragCoefficient, "dragCoefficient", 0.01);
+    DefineOptionalParameterWithDefaultValue(ConstrainRegions, "constrainRegions", false);
   }
   
   FluctuatingChargeParameters::~FluctuatingChargeParameters() {    
@@ -66,6 +68,7 @@ namespace OpenMD {
     CheckParameter(MaxIterations, isPositive());    
     CheckParameter(TargetTemp,  isNonNegative());
     CheckParameter(TauThermostat, isPositive()); 
+    CheckParameter(DragCoefficient, isPositive()); 
   }
   
 }