SEARCH Articles Figures Tables Acidity operational definition Adiabatic operation definition Adjoint operator, definition Alkalinity operational definition An operational statistical definition of more Annihilation operator definition Cation activity, operational definition Coating operations definition Creation operator definition Definition of Operational Impedance Definition of operating regimes Density operator, definition Destruction operator, definition Dipole difference operator, definition Dipole operator directions, definition Force, operational definition Force, operational definition 552 INDEX Hamiltonian operator definition Hermitian operators definition Hierarchical Models and Definition of Operating States Identity operation, definition Ionic compounds operational definition Irreducible tensor operators definition Isothermal operation, definition Kinetic energy operator, definition Laboratory operator definition Lowering operators, definition Mass-transfer operations definitions Measurement, operational definitions Nuclear tensor operators, definition Operating Procedures definition Operating definition Operating definition Operating systems definition Operation definition Operation definition Operational Qualification definition Operational definitions Operational definitions dissolved matter Operational definitions particulate matter Operational definitions, performance metrics Operational integrity, definition Operational parameters, definitions Operational stage definition Operational thermodynamic definition Operator definitions, phase properties Operators definition space Particle, operational definition Permutation operator definition Projection operator definition Raising operators, definition Reflection operation, definition Remarks Concerning the Definition of Operators Spin tensor operators definition Symmetry operations definition Temperature scale operational definition Tensor operator definitions Unit operations definition Wave operators definition