Now showing items 11-20 of 116
WIMPZILLAS!
(The American Institute of Physics, 1999-07-13)
There are many reasons to believe the present mass density of the universe is dominated by a weakly interacting massive particle (WIMP), a fossil relic of the early universe. Theoretical ideas and experimental efforts have ...
The use of Kubo formula to examine low temperature transport limited by interface roughness and phonons in metal–oxide–semiconductor field effect transistors
(The American Institute of Physics, 1999-02-15)
An approach to study transport in semiconductors using the Kubo formula is developed and applied to Si metal–oxide–semiconductor field effect transistors (MOSFETs). It is known that interface roughness is an important ...
Secondary breakup of axisymmetric liquid drops. I. Acceleration by a constant body force
(The American Institute of Physics, 1999-12)
The secondary breakup of liquid drops, accelerated by a constant body force, is examined for small density differences between the drops and the surrounding fluid. Two cases are examined in detail: a density ratio close ...
Numerical simulation of dust explosions in pneumatic conveyors
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-04)
Dust conveyors are used in a wide range of industrial applications. Explosions can be transmitted through dust conveyors to different parts of a processing facility and thus can cause a large amount of damage. In order to ...
Flow-aligning and tumbling in small-molecule liquid crystals: pure components and mixtures
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-08)
The results of an experimental study to measure the tumbling parameter, λ, for various small-molecule liquid crystals and their mixtures are presented. The methods used include textural observations (twist walls), a direct ...
Quasi-collinear and partially degenerate four-wave mixing: An alternative explanation of the phase-conjugation property of backward stimulated scattering
(Nauka/Interperiodica; American Institute of Physics ; Springer Science+Business Media, 1999-02)
A quasi-collinear and partially degenerate four-wave mixing model is proposed to explain the optical phase-conjugation property of various types of stimulated backscattering. According to this model, after passing through ...
Composite bound states of wide and narrow envelope solitons in the coupled Schrödinger equations through matched asymptotic expansions
(IOP Publishing Ltd, 1999-11-01)
Coupled nonlinear Schrödinger equations, linked by cross modulation terms, arise in both nonlinear optics and in Rossby waves in the atmosphere and ocean. Numerically, Akhmediev and Ankiewicz and Haelterman and Sheppard ...
MR-Bildgebung der NierenNeue Ansätze in der Diagnostik*
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-05)
Fragestellung: Darstellung neuer diagnostischer Möglichkeiten im Bereich der Niere mittels schneller Magnetresonanz (MR)- Bildgebung. Methodik: Vorgestellt wird ein kombiniertes morphologisches und funktionelles ...
REVIEW ARTICLE: Electron-drag effects in coupled electron systems
(IOP Publishing Ltd, 1999-02-08)
The advances in the techniques used for fabrication and lithography of semiconductors have made it possible to study bi-layer systems made of two electronic layers separated by distances of several hundred ångströms. In ...
String fluid dynamical models in the Einstein-Cartan theory
(IOP Publishing Ltd, 1999-03-01)
Using the general, energy-momentum tensor for a dynamical, string fluid developed from the Ray-Hilbert variational principle, physically motivated applications to Riemann-Cartan spacetime are given within the framework of ...