DEEP is a two-phase spectral survey of faint field galaxies with the Keck Telescopes. The goals include exploring galaxy formation and evolution , mapping distant large scale structures, and constraining cosmology. DEEP, since its inception in the early 1990’s, has been distinguished by an emphasis on studying the kinematics and masses of distant galaxies. The major DEEP survey in the second ph...

At very high energies, the Landau-Pomeranchuk-Migdal effect reduces the cross sections for electron bremsstrahlung and photon e + e − pair production. The fractional electron energy loss and pair production cross sections drop as the energy increases. In contrast, the cross sections for photonuclear interactions grow with energy. In solids and liquids, at energies above 10 20 eV, photonuclear r...

City models are needed in many areas of human activities including urban planning, virtual reality, and architecture preservation. Aerial, ground level, and omnidirectional city modeling techniques are compared and their main advantages and disadvantages are presented. We also show several city modeling systems and address their novelties as well as their limitations. Next, we present our previ...

Restoring vision in the blind by direct cortical stimulation has been a dream since the discovery of electricity in the 18th century. In the centuries since these optimistic beginnings, researchers have made important progress in several aspects of the problem, although in many ways the ultimate goal still seems as distant as ever. In this paper I will review the current state of the art of hum...