The use of radial basis function networks for fine pointing NASA’s 70-meter deep space network antennas is described and evaluated. We demonstrate that such a network, working in conjunction with the array feed compensation system, and trained using the computationally efficient orthogonal least-squares algorithm, can point a 70meter deep space antenna with rms errors of less than 0.3 millidegr...

In this work, a method for directly measuring target velocity in three dimensions using dual axis correlation interferometric radar is presented. Recent advances have shown that the measurement of target's angular possible by correlating signals measured at spatially diverse aperture locations. By utilizing multiple orthogonal baselines and conventional Doppler methods to obtain radial velocity...

let $a_1$, $a_2$ be unital banach algebras and $x$ be an $a_1$-$a_2$- module. applying the concept of module maps, (inner) modulegeneralized derivations and  generalized first cohomology groups, wepresent several results concerning the relations between modulegeneralized derivations from $a_i$ into the dual space $a^*_i$ (for$i=1,2$) and such derivations  from  the triangular banach algebraof t...

conclusions complete recovery of the hand and finger extension was achieved in nine months. case presentation a 61 year-old man presented with the chief complaint of inability to extend the wrist and the fingers of the left hand which began suddenly the night before admission, following a three-week history of pain, numbness and tingling sensation of the affected extremity. he had no history of...

This study is concerned with the magnetic force models of magnetic bearing in a flywheel energy storage system (FESS). The magnetic bearing is of hybrid type, with axial passive magnetic bearing (PMB) and radial hybrid magnetic bearing (HMB). For the PMB, a pair of ring-type Halbach arrays of permanent magnets are arranged vertically to support the rotor weight. For the HMB, a set of ring-type ...

Isotropic whole-heart imaging has become an important protocol in simplifying cardiac MRI. The acquisition time can however be a limiting factor when acquiring large field-of-views at high spatial resolutions. To reduce acquisition times, a three-dimensional (3D) acquisition scheme combining Cartesian sampling in the readout direction with a radial sampling scheme in the phase encoding plane, w...

We have analyzed cell behavior in the organizer region of the Xenopus laevis gastrula by making high resolution time-lapse recordings of cultured explants. The dorsal marginal zone, comprising among other tissues prospective notochord and somitic mesoderm, was cut from early gastrulae and cultured in a way that permits high resolution microscopy of the deep mesodermal cells, whose organized int...