Now showing items 21-30 of 429
Current status of heterojunction bipolar and high-electron mobility transistor technologies
(Elsevier, 1992-09)
The current status of Heterojunction Bipolar and High-Electron Mobility Transistor technology is reviewed. Applications include analog and digital circuits with focus on high power and optical communications for HBT's and ...
Hybrid Poissoflolynomial Objective Functions for Tomographic Image Reconstruction from Transmission Scans
(IEEE, 1995-10)
This paper describes rapidly converging algorithms for computing attenuation maps from Poisson transmission measurements using penalized-likelihood objective functions. We demonstrate that an under-relaxed cyclic ...
HF-UHF Propagation Prediction Over Rough Terrain
(University of Michigan. Radiation Laboratory, 1999-07)
Depth from relative normal flows
(Elsevier, 1990)
Most of the depth from image flow algorithms has to rely on either good initial guesses, or some assumptions about the object surfaces to achieve solutions that agree with the physical world. Waxman and Sinha point out ...
A millimeter wave technique for measuring ice thickness on the Space Shuttle's external tank
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1991-12)
The external fueltank of the Space Shuttle contains extremely lowtemperature propellents. A layer of material known as SOFI (Spray-On Foam Insulation) covering the outside of the fueltank provides thermal insulation between ...
Photoluminescence Studies on Self-Organized InAlAs/AlGaAs Quantum Dots under Pressure
(WILEY-VCH Verlag, 1999-01)
The pressure dependence of the low temperature photoluminescence (PL) in self-organized In 0.5 Al 0.5 As/Al 0.25 Ga 0.75 As quantum dots (QD) has been investigated up to 8 GPa. Interesting features of the QD PL observed ...
Theory of lateral bandgap variation achievable by strain engineering in patterned substrate strain epitaxy
(Elsevier, 1990)
Energy minimization considerations are used to estimate the strain tensor for pseudomorphic structures grown on a patterned substrate. We show that if a material B is deposited below critical thickness in a hole of width ...
Theory of residence-time control by output feedback
(Kluwer Academic Publishers; Springer Science+Business Media, 1991-03)
The problem of residence-time control by the observer-based output feedback is formulated and solved for the case of linear systems with small additive input noise. Both noiseless and noisy measurements are considered. In ...
XNetMod: A Design Tool for Large-Scale Networks
(Center for Information Technology Integration, 1993-08-18)
The network modeling tool XNetMod (based on NetMod) uses simple analytical models to allow designers of interconnected local area networks to analyze and simulate the potential performance of networks. This tool can be ...