Abstract : The Book of Abstracts for papers presented: Space, time and Life, 26 August 2002 - 30 August 2002. Some topics include Structure and evolution of the universe, life and entropy, and nano-scale phenomena.

It is shown that the spin is naturally introduced into classical mechanics if the latter is formulated as dynamics of the phase space density. It is shown that the uncertainty principle, as the amendment in this dynamics, restricts possible spins, and in particular equation for the particle with the spin ~ / 2 is derived. Also equation for the charge with this spin is derived when electromagnetic field is included. In one example it is shown that the modulus of the spin changes with the gradient of the magnetic field.

Angular momentum is important concept in physics, and its phase space properties are important in various applications. In this work phase space analysis of the angular momentum is made from its classical definition, and by imposing uncertainty principle its quantum properties are obtained. It is shown that kinetic energy operator is derived, but it has different interpretation of its parts than in the standard treatment. Rigid rotor is discussed and it is shown what is its phase space representation. True rigid rotor is defined and also its phase space properties are discussed.