use new SI functionality

VectoCore/Models/SimulationComponent/Data/AccelerationCurve.cs

@@ -137,7 +137,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Data
 			var m = v1 + d / k;
 			var b = -d / k;
 			var c = 0.SI<Meter>() - m / k;
-			var t = (Math.Log((v2 * k + d).Value() / (v1 * k + d).Value()) / k.Value()).SI<Second>();
+			var t = Math.Log(((v2 * k + d) / (v1 * k + d)).Cast<Scalar>()) / k;
 			// TODO @@@quam: remove .SI<> when bug #VECTO-111 is fixed...
 
 			return m / k * Math.Exp((k * t).Value()) + b * t + c;

VectoCore/Models/SimulationComponent/Impl/Driver.cs

@@ -380,7 +380,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 		{
 			var exceeded = new List<Watt>(); // only used while testing
 			var acceleration = new List<double>(); // only used while testing
-			var searchInterval = CurrentState.Acceleration.Value() / 2.0;
+			var searchInterval = CurrentState.Acceleration / 2.0;
 			Meter originalDs = ds;
 
 			do {
@@ -413,7 +413,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
 				}
 				// check for minimum acceleration, add some safety margin due to search
 				if (Math.Abs(CurrentState.Acceleration.Value()) < Constants.SimulationSettings.MinimumAcceleration.Value() / 5.0 &&
-					Math.Abs(searchInterval) < Constants.SimulationSettings.MinimumAcceleration.Value() / 20.0) {
+					searchInterval.Abs() < Constants.SimulationSettings.MinimumAcceleration / 20.0) {
 					throw new VectoSimulationException("Could not achieve minimum acceleration");
 				}
 				searchInterval /= 2.0;