Geometries of orthogonal groups and their contractions: a unified classical deformation viewpoint

The geometries of spaces having as groups the real orthogonal groups and some of their contractions are described from a common point of view. Their central extensions and Casimirs are explicitly given. An approach to the trigonometry of their spaces is also advanced.Comment: 9 pages, LaTeX; contribution presented by M.Santander to the II International Workshop on Classical and Quantum Integrible Systems (Dubna, 8-12 July,1996), to be published in Int.J.Mod.Phys.

Radiation Damping in a Non-Abelian Strongly-Coupled Gauge Theory

We study a `dressed' or `composite' quark in strongly-coupled N=4 super-Yang-Mills (SYM), making use of the AdS/CFT correspondence. We show that the standard string dynamics nicely captures the physics of the quark and its surrounding quantum non-Abelian field configuration, making it possible to derive a relativistic equation of motion that incorporates the effects of radiation damping. From this equation one can deduce a non-standard dispersion relation for the composite quark, as well as a Lorentz covariant formula for its rate of radiation.Comment: 10 pages; based on talks at Quantum Theory and Symmetries 6 and the XII Mexican Workshop of Particles and Fields

Study of the average vertical distribution of temperature in the martian atmosphere final report

Convective-radiative equilibrium model for computing temperature profile - vertical temperature distribution in Martian atmospher