Package org.jscience.physics.model

Provides models for physical quantities.

The difference between models lies in the assumptions each makes and, in consequence,the operations each permits. For example, the summation of a length and a duration is not allowed by the standard model, but is quite valid in a relativistic context.

Models are context-local, allowing multiple models to be used concurrently. For example:[code] LocalContext.enter(); try { RelativisticModel.select(); // Affects the current thread only. ... } finally { LocalContext.exit(); }[/code]

The names and characteristics of the models are presented in the following table:

Model Class Defining Characteristics Default Output Units
Standard "StandardModel" per Système Internationale Length: m;  Mass: kg;  Duration: s;  ElectricCurrent: A;  Temperature: K;  AmountOfSubstance: mol;  LuminousIntensity: cd
Relativistic "RelativisticModel" 1 = c Length, Duration: s;  Mass: eV;  ElectricCurrent: A;  Temperature: K;  AmountOfSubstance: mol;  LuminousIntensity: cd
High-Energy "HighEnergyModel" 1 = c
   = k
   = ePlus 		Length, Duration: ns;  Mass, Temperature: GeV;  ElectricCurrent: 1/ns;  AmountOfSubstance: mol;  LuminousIntensity: cd
Quantum "QuantumModel" 1 = c
   = k
   = µ0
   = hBar 		Length, Duration: 1/GeV;  Mass, Temperature, ElectricCurrent: GeV;  AmountOfSubstance: mol;  LuminousIntensity: cd
Natural "NaturalModel" 1 = c
   = k
   = µ0
   = hBar
   = G 		Length, Mass, Duration, ElectricCurrent, Temperature: 1;  AmountOfSubstance: mol;  LuminousIntensity: cd