Now showing items 21-30 of 4078
Monte Carlo studies on the well‐width dependence of carrier capture time in graded‐index separate confinement heterostructure quantum well laser structures
(The American Institute of Physics, 1993-10-04)
The total carrier capture time and the quantum well width are both important parameters affecting the graded‐index separate confinement heterostructure (GRINSCH) quantum well laser modulation speed limit. However, discrepancies ...
A Morphology-Cosmology Connection for X-Ray-Clusters
(Univ Chicago Press, 1993-12-10)
We employ N-body/three-dimensional gasdynamic simulations of the formation of galaxy clusters to determine whether cluster X-ray morpholgies can be used as cosmological constraints. Confirming the analytic expectations of ...
Localization of parathyroid enlargement: experience with technetium-99m methoxyisobutylisonitrile and thallium-201 scintigraphy, ultrasonography and computed tomography
(Springer-Verlag, 1994-01)
Technetium-99m methoxyisobutylisonitrile (MIBI), like thallium-201, has recently been introduced as a myocardial perfusion agent and is now also showing very promising results in parathyroid scintigrapy. The results of 201 ...
Statistical Mechanics of Assemblies of Coupled Oscillators
(The American Institute of Physics, 1965-04)
It is shown that a system of coupled harmonic oscillators can be made a model of a heat bath. Thus a particle coupled harmonically to the bath and by an arbitrary force to a fixed center will (in an appropriate limit) ...
Conductivity of a system of metallic particles dispersed in an insulating medium
(The American Institute of Physics, 1973-06)
The variation of the conductivity of metal‐particle—insulator systems with the volume percent of metal is explained in terms of an ``effective medium'' theory.
Momentum, heat and mass transfer in logarithmic spiral flows of incompressible viscous fluids
(Elsevier, 1964-10)
This paper presents a theoretical investigation of the transfer of momentum, heat and mass in incompressible viscous flow through a logarithmic spiral channel. The velocity, temperature and concentration profiles are ...
Synthesis and regional mouse brain distribution of [11C]Nisoxetine, a norepinephrine uptake inhibitor
(Elsevier, 1989)
Nisoxetine, a selective and high affinity (IC50 = 1 nM) inhibitor of NE reuptake, has been radiolabeled in high specific activity (> 600 Ci/mmol) by the alkylation of the nor-methyl precursor with [11C]CH3I. Synthetic ...
Theory of photoluminescence in quantum wells in the presence of transverse electric field: Monte Carlo approach
(The American Institute of Physics, 1986-04-15)
The Monte Carlo approach is used to study the quasibound electron and hole ground‐state levels in a quantum well in the presence of a transverse electric field. A criteria is developed to ensure that the ground state is a ...
Jet production by a gluon source in QCD
(Elsevier, 1978-12-25)
The properties of jets produced by a gluon source are examined in QCD. We give a simple derivation of the jet opening angle (up to an undetermined constant) using arguments of general applicability. At asymptotic energies, ...
The influences of roughness on film thickness measurements by Mueller matrix ellipsometry
(The American Institute of Physics, 1994-09)
The accuracy of measurement of the thickness of uniform thin films on solid substrates by null ellipsometry is severely limited when the substrate is rough. It is impossible to separate these two effects experimentally ...