Now showing items 1-10 of 179
Optimum separate confinement structure for midinfrared HgCdTe heterostructure lasers
(The American Institute of Physics, 1992-09-01)
A study for the optimization of HgCdTe heterostructure lasers for applications as midinfrared wavelength sources has been carried out. Structures are examined to emit photons at 2.5 and 4.5 μm at 77 K. For the 2.5 μm case, ...
A fully implicit method for diffusion-controlled solidification of binary alloys
(Elsevier, 1992-05)
A recently developed numerical method for single-component phase-change problems is extended to treat some existing multi-domain models for diffusion-controlled solidification of binary alloys. The multi-domain models ...
Thermal destratification in a cylindrical packed bed
(Elsevier, 1992-03)
Thermal destratification was observed in a cylindrical packed bed 62 cm high and 37.5 cm in diameter filled with 12.6 mm diameter glass spheres and saturated with air. The boundaries were impermeable and covered with 10.2 ...
A simple synthesis of [11C]methyl triflate
(Elsevier, 1992-11)
[11C]Methyl triflate ([11C]methyl trifluoromethanesulfonate) was formed in high yield when [11C]methyl iodide in a nitrogen carrier was passed at 200[deg]C through a column containing graphitized carbon impregnated with ...
Schlieren and dye laser resonance absorption photographic investigations of KrF excimer laser‐ablated atoms and molecules from polyimide, polyethyleneterephthalate, and aluminum
(The American Institute of Physics, 1992-09-01)
Hydrodynamic phenomena from KrF excimer laser ablation (10−3–20 J/cm2) of polyimide, polyethyleneterephthalate, and aluminum are diagnosed by schlieren photography, shadowgraphy, and dye laser resonance absorption photography ...
Landau-cutkosky rules, scale invariance, and the marginal fermi liquid
(Elsevier, 1992-09)
With the aid of the reduced graph expansion relating different order multiple interaction vertices and the exact spectral densities, we show that a strongly coupled Fermi system can allow solutions for the spectral density ...
Qualitative dynamics of planar chains
(Elsevier, 1992-01-01)
In this paper we derive the equations of motion and analyze some aspects of the dynamics of planar chains. We show that (a) for any integer vector n=(n1,...,nN) (where N is the number of joints) there exists a periodic ...
Computations of multi-fluid flows
(Elsevier, 1992-11-01)
Full numerical simulations of three-dimensional flows of two or more immiscible fluids of different densities and viscosities separated by a sharp interface with finite surface tension are discussed. The method used is ...
-Torsion, foliations and holomorphic vector fields
(Springer-Verlag, 1992-04)
In this paper, we investigate the relation between -torsion and holomorphic vector fields. We consider complex manifolds which fibrate over the torus having a transverse one dimensional holomorphic foliation. The torsion ...
On possibilities of fast cooling of heavy particle beams
(The American Institute of Physics, 1992-04-10)
Two methods of fast cooling of intensive beams are described. The first one, coherent electron cooling, is based on enhancement of friction effect in the electron cooling method using a microwave instability of electron ...