Ryan Mukai

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The use of radial basis function (RBF) networks and least squares algorithms for acquisition and fine tracking of NASA's 70-m-deep space network antennas is described and evaluated. We demonstrate that such a network, trained using the computationally efficient orthogonal least squares algorithm and working in conjunction with an array feed compensation(More)
Ectopic PTH secretion by tumor cells has been described as the cause of hypercalcemia associated with malignancy in the absence of osteolytic bone lesions. Although there have been case reports of elevated PTH and hypercalcemia in patients with rhabdomyosarcoma, to date ectopic PTH secretion by malignant cells has not been definitively shown. The(More)
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(More)
As a distributed generation system increases, a stable power supply becomes difficult. Thus control of power leveling (PL) unit is required to maintain the balance of power flow for irregular power generation. The unit is required to respond to change of voltage and bidirectional power flow. So the bidirectional buck/boost DC/DC converter is applied for the(More)
(51) Int. Cl. GOIS 7102 (2006.01) GOIS13166 (2006.01) GOI S 13100 (2006.01) (52) U.S. Cl . ................ 342/60; 342/73; 342/74; 342/75; 342/81; 342/89; 342/175; 342/195; 342/368 (58) Field of Classification Search .................... 342/52, 342/58, 60, 73-81, 104-116, 159-164, 175, 342/192-197, 368-384, 89; 244/3.1-3.3; 343/753-755, 757-766, 772, 781(More)
The Mars Exploration Rover Opportunity has recently completed a two year campaign studying Victoria Crater. The campaign culminated in a close approach of Cape Verde in order to acquire high resolution imagery of the exposed stratigraphy in the cliff face. The close approach to Cape Verde provided significant challenges for every subsystem of the rover as(More)
The use of radial basis function networks and least squares algorithms for acquisition, and fine tracking of NASA’s 70-meter deep space network antennas is described and evaluated. We demonstrate that such an RBF network, working in conjunction with an array feed compensation system, and trained using the computationally efficient orthogonal least-squares(More)
A method for optimal adaptive setting of pulse-positionmodulation pulse detection thresholds, which minimizes the total probability of error for the dynamically fading optical free space channel, is presented. The threshold’s adaptive setting, in response to varying channel conditions, results in orders of magnitude improvement in probability of error, as(More)
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