the only justification for the einstein velocity addition law appeared to be its empirical adequacy, so that the intrinsic beauty and harmony in einstein addition remained for a long timea mystery to be conquered. accordingly, the aim of this expository article is to present(i) the einstein relativistic vector addition,(ii) the resulting einstein scalar multiplication,(iii) the einstein relativ...

Jorg Kramer, Rahul Sarpeshkar and Christof Koch California Institute of Technology Computation and Neural Systems 139-74 Pasadena, CA 91125 phone: (818) 395-2874 fax: (818) 796-8876 e-mail: [email protected] ABSTRACT An integrated circuit that computes the velocity vector of a visual stimulus in one dimension is presented. The circuit combines optical sensors and associated electronics o...

Magnetic resonance imaging (BARI) is used to map the distribution and dynamics of nuclei such as hydrogen. Imaging can be adapted to shalw blood in contrast to the surrounding sationary tissues. This application of MRI referred to as MR angiography @IRA) has become widely used in cardiovascular assessment beciiuse of its sensitivity to disease states and lack of ionising radiation or iodinated ...

The only justification for the Einstein velocity addition law ‎appeared to be its empirical adequacy‎, ‎so that the ‎intrinsic beauty and harmony in Einstein addition remained for a long time ‎a mystery to be conquered‎. ‎Accordingly‎, ‎the aim of this expository article is to present ‎(i) the Einstein relativistic vector addition‎, ‎(ii) the resulting Einstein scalar multiplication‎, ‎(iii) th...

We performed time-resolved 3D phase-contrast MR imaging by using a 1.5T MR scanner to visualize hemodynamics in a silicon vascular model with a middle cerebral aneurysm. We ran an aqueous solution of glycerol as a flowing fluid with a pulsatile pump. Time-resolved images of 3D streamlines and 2D velocity vector fields clearly demonstrated that the aneurysm had 3D complex vortex flows within it ...