--- trunk/src/io/Globals.cpp	2006/01/13 21:57:48	867
+++ trunk/src/io/Globals.cpp	2006/03/31 18:09:22	927
@@ -98,6 +98,10 @@ Globals::Globals() {
   DefineOptionalParameter(ElectrostaticScreeningMethod, "electrostaticScreeningMethod");
   DefineOptionalParameter(CutoffPolicy, "cutoffPolicy");
   DefineOptionalParameter(SwitchingFunctionType, "switchingFunctionType");
+  DefineOptionalParameter(HydroPropFile, "HydroPropFile");
+  DefineOptionalParameter(Viscosity, "viscosity");
+  DefineOptionalParameter(BeadSize, "beadSize");
+  
   DefineOptionalParameterWithDefaultValue(UsePeriodicBoundaryConditions, "usePeriodicBoundaryConditions", true);
   DefineOptionalParameterWithDefaultValue(UseInitalTime, "useInitialTime", false);
   DefineOptionalParameterWithDefaultValue(UseIntialExtendedSystemState, "useInitialExtendedSystemState", false);
@@ -129,7 +133,7 @@ void Globals::validate() {
 
   CheckParameter(ForceField, isNotEmpty());
   CheckParameter(TargetTemp, isPositive());
-  CheckParameter(Ensemble, isEqualIgnoreCase("NVE") || isEqualIgnoreCase("NVT") || isEqualIgnoreCase("NPTi") || isEqualIgnoreCase("NPTf") || isEqualIgnoreCase("NPTxyz") || isEqualIgnoreCase("NPAT")  );
+  CheckParameter(Ensemble, isEqualIgnoreCase("NVE") || isEqualIgnoreCase("NVT") || isEqualIgnoreCase("NPTi") || isEqualIgnoreCase("NPTf") || isEqualIgnoreCase("NPTxyz") || isEqualIgnoreCase("NPAT")  || isEqualIgnoreCase("LANGEVINDYNAMICS") || isEqualIgnoreCase("NPRT"));
   CheckParameter(Dt, isPositive());
   CheckParameter(RunTime, isPositive());
   CheckParameter(InitialConfig, isNotEmpty());
@@ -164,7 +168,7 @@ void Globals::validate() {
   CheckParameter(ThermIntDistSpringConst, isPositive());
   CheckParameter(ThermIntThetaSpringConst, isPositive());
   CheckParameter(ThermIntOmegaSpringConst, isPositive());
-  CheckParameter(SurfaceTension, isPositive());
+  CheckParameter(SurfaceTension, isNonNegative());
   CheckParameter(ElectrostaticSummationMethod, isEqualIgnoreCase("NONE") || isEqualIgnoreCase("SHIFTED_POTENTIAL") || isEqualIgnoreCase("SHIFTED_FORCE") || isEqualIgnoreCase("REACTION_FIELD"));
   CheckParameter(ElectrostaticScreeningMethod, isEqualIgnoreCase("UNDAMPED") || isEqualIgnoreCase("DAMPED")); 
   CheckParameter(CutoffPolicy, isEqualIgnoreCase("MIX") || isEqualIgnoreCase("MAX") || isEqualIgnoreCase("TRADITIONAL"));
@@ -176,7 +180,8 @@ void Globals::validate() {
   CheckParameter(ThermIntOmegaSpringConst, isPositive());
   CheckParameter(DampingAlpha,isNonNegative());
   CheckParameter(SkinThickness, isPositive());
-
+  CheckParameter(Viscosity,isNonNegative());
+  CheckParameter(BeadSize,isPositive());
   for(std::vector<Component*>::iterator i = components_.begin(); i != components_.end(); ++i) {
     if (!(*i)->findMoleculeStamp(moleculeStamps_)) {
         std::ostringstream oss;