Universal particle acceleration
Universal rotation - How large can it be?
Universality of chaotic rare fluctuations in a locally coupled phase map model
Unraveling the heliosphere using ENA data and computational models
Unraveling the kinematics of early-type galaxies - Presentation of a new method and its application to NGC4621
Unsaturated Comptonization of isotropic photon spectra by relativistic electrons
Unsolved Problems of Celestial Mechanics
Unstable matter and the 1-0 MeV gamma-ray background
Unstable models of axisymmetric galaxies
Unstable modes of a spherical stellar system
Unsteady flame spread over solid fuels in microgravity
Unsteady flow of a relativistic radiating gas in a gravitational field
Unsteady hydromagnetic flow past a porous spherical or cylindrical surface
Unsteady hydromagnetic free-convection flow with radiative heat transfer in a rotating fluid. I - Incompressible optically thin fluid
Unsteady magnetohydrodynamic flows in a rotating elasto-viscous fluid
Unsteady magnetohydrodynamic free-convection flows in a rotating fluid
Unsteady MHD flow past a porous plate with step function change in suction at slip flow regime
Unsteady MHD free-convection flows on a porous plate with time-dependent heating in a rotating medium
Unusual Bonding Mechanisms in Beryllium Compounds
Unusual properties of bar-within-ring galaxies and the projection effect model for barred spiral galaxies