Now showing items 101-110 of 116
Temperature dependence of the magnetization reversal in Co(fcc)–BN–Co(poly hcp) structures
(The American Institute of Physics, 1999-04-15)
The magnetic properties of multilayer structures with two magnetic layers of the same metal (Co) but with different crystallographic structures separated by an insulating BN layer have been studied. These structures were ...
In situ force-balance tensiometry
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-07)
Although a fundamental physical parameter, surface tension is difficult to measure. Common tensiometry inaccuracy comes from failure to control air–liquid–solid contact conditions, or account for liquid meniscus geometry ...
Excitation thresholds for nonlinear localized modes on lattices
(IOP Publishing Ltd, 1999-05-01)
We consider spatially localized and time periodic solutions to discrete extended Hamiltonian dynamical systems (coupled systems of infinitely many `oscillators' which conserve total energy). These play a central role as ...
Ultraviolet emission of silicon quantum tips
(The American Institute of Physics, 1999-01-18)
Silicon tips used as field emitters have dimensions that are within the quantum confinement regime. Therefore they can be considered as freestanding silicon tips. In this letter, a photoluminescence spectrum of a 100×100100×100 ...
Characterization of surface structure in sputtered Al films: Correlation to microstructure evolution
(The American Institute of Physics, 1999-01-15)
Quantitative roughness and microstructural analysis of as-deposited Al films, 0.1–1.0 μm thick, were performed by atomic force microscopy (AFM), one-dimensional power spectral density analysis (1DPSD), transmission electron ...
Semi-quantitative ventilation/perfusion scintigraphy and single-photon emission tomography for evaluation of lung volume reduction surgery candidates: description and prediction of clinical outcome
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-06)
Ventilation/perfusion scans with single-photon emission tomography (SPET) were reviewed to determine their usefulness in the evaluation of lung volume reduction surgery (LVRS) candidates, and as a predictor of outcome after ...
Rotational spectrum, structure, and modeling of the HCCH–(OCS)2HCCH–(OCS)2 trimer: Observation of a polar OCS dimer fragment
(The American Institute of Physics, 1999-12-15)
The rotational spectra of eight isotopomers of the HCCH–(OCS)2HCCH–(OCS)2 trimer have been assigned by pulsed nozzle, Fourier-transform microwave spectroscopy. The rotational constants and dipole moment components are ...
Hierarchies of nonclassical reaction kinetics due to anisotropic confinements
(The American Institute of Physics, 1999-01-22)
In contrast to classical chemical reaction kinetics, for diffusion limited chemical reactions the anisotropy of the geometry has far reaching effects. We use tubular two and three-dimensional spaces to illustrate and discuss ...
Properties of the intracluster medium in an ensemble of nearby galaxy clusters
(Univ Chicago Press, 1999-06-01)
We present a systematic analysis of the intracluster medium (ICM) in an X-ray flux limited sample of 45 galaxy clusters. Using archival ROSAT Position-Sensitive Proportional Counter (PSPC) data and published ICM temperatures, ...
Non-Existence of Black Hole Solutions¶for a Spherically Symmetric, Static Einstein–Dirac–Maxwell System
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-08)
We consider for j =½, … a spherically symmetric, static system of (2 j +1) Dirac particles, each having total angular momentum j . The Dirac particles interact via a classical gravitational and electromagnetic field.