Now showing items 51-60 of 75
High resolution laser spectroscopy of relaxation and the excitation lineshape of excitons in GaAs quantum well structures
(Elsevier, 1990-04-01)
A new class of measurements on GaAs quantum well structures based on frequency domain nonlinear laser spectroscopy is described. Room temperature measurements of the excitation relaxation show an interference effect in the ...
Properties and device applications of deep quantum well resonant tunneling structures
(Elsevier, 1990-04-01)
A self-consistent quantum mechanical simulation is used to study the effects of doping, spacer layers, barrier height, barrier width and well doping on the bound state and bound state charge in a deep quantum well resonant ...
Automated analysis of spontaneously occurring arrhythmias by implantable devices: Limitations of using rate and timing features alone
(Elsevier, 1994)
Real-time automated systems for arrhythmia analysis by implantable antitachycardia devices have been designed to incorporate two-channel rate criteria with intracavitary atrial and ventricular electrogram morphology. Because ...
Application of optimized parallel processing digital computers and numerical approximation methods to the ultra high-speed three-dimensional reconstruction of the intact thorax
(Elsevier, 1979-08)
In order to achieve the computational capability to carry out many thousands of cross-sectional reconstructions, necessary to support a prototype high temporal and spatial resolution cylindrical scanning multiaxial tomographic ...
Epitaxial growth and characterization of GaAs/Al/GaAs heterostructures
(Elsevier, 1990-04-01)
We report on transmission electron microscopy, secondary ion mass spectroscopy, X-ray and Raman scattering studies of GaAs/Al/GaAs heterostructures grown by migration enhanced epitaxy.
CASMIL: a comprehensive software/toolkit for image-guided neurosurgeries This research was supported in part by a research grant from Michigan Life Sciences Corridor (Grant No MEDC-459).
(John Wiley & Sons, Ltd., 2006-06)
Background CASMIL aims to develop a cost-effective and efficient approach to monitor and predict deformation during surgery, allowing accurate, and real-time intra-operative information to be provided reliably to the ...
Joint design of trajectory and RF pulses for parallel excitation
(Wiley Subscription Services, Inc., A Wiley Company, 2007-09)
We propose an alternating optimization framework for the joint design of excitation k-space trajectory and RF pulses for small-tip-angle parallel excitation. Using Bloch simulations, we show that compared with conventional ...
In vivo mapping of cholinergic terminals in normal aging, Alzheimer's disease, and Parkinson's disease
(Wiley Subscription Services, Inc., A Wiley Company, 1996-09)
To map presynaptic cholinergic terminal densities in normal aging (n = 36), Alzheimer's disease (AD) (n = 22), and Parkinson's disease (PD) (n = 15), we performed single-photon emission computed tomography using [ 123 ...
Heal mucosal diaphragm causing small bowel obstruction
(Springer-Verlag, 1983-12)
A case of small bowel obstruction in an adult due to ileal mucosal diaphragm is reported. This unusual cause of small bowel obstruction to the best of our knowledge has not been previously reported. The cause of intestinal ...