Ultrasonic imaging with limited-diffraction beams

Ultraviolet-Finite QFT on Curved Space-Times

Un nouveau regard sur le monde physique

Un Resultat Gravimetrique pour la Renaissance de la Theorie Corpusculaire "An Experimental Gravimetric Result for the Revival of Corpuscular Theory"

Un-renormalized Classical Electromagnetism

Unconditionally secure computers, algorithms and hardware, such as memories, processors, keyboards, flash and hard drives

Unconditionally secure quantum bit commitment is simply possible

Unconventional Logic Elements on the Base of Topologically Modulated Signals

Underpinning the universe: its scales, holography and fractality

Unexplored Aspect of Velocity of light

Unfaithful embedding of causal sets

Unfamiliar trajectories for a relativistic particle in a Kepler or Coulomb potential

Unification By Induction

Unification of classic and quantum mechanics

Unification of Electromagnetism and Gravitation in the Framework of General Geometry

Unification of Gravitational and Electromagnetic Fields in Riemannian Geometry

Unification of some classical and quantum ideas

Unified Description of Dark Energy and Dark Matter

Unified description of radiative and dielectronic recombination, including the coupling between autoionization and radiation continua

Unified Equations of Boson and Fermion at High Energy and Some Unifications in Particle Physics