Now showing items 31-40 of 116
Design of piezoelectric transducers using topology optimization
(IOP Publishing Ltd, 1999-06-01)
Among other applications piezoelectric transducers are widely used for acoustic wave generation and as resonators. These applications require goals in the transducer design such as high electromechanical energy conversion ...
Blowing-up the four-dimensional Z3 orientifold
(IOP Publishing Ltd, 1999-04-01)
We study the blowing-up of the four-dimensional Z3 orientifold of Angelantonj, Bianchi, Pradisi, Sagnotti and Stanev (ABPSS) by giving nonzero vacuum expectation values (VEV's) to the twisted sector moduli blowing-up ...
Interferences and coherent control of excitons in GaAs quantum wells
(IOP Publishing Ltd, 1999-08-09)
Coherent control and light-heavy-hole beats observed in transient optical experiments in GaAs quantum wells are discussed in terms of a free-boson model. The properties of the exactly calculated wavefunction of the ...
Direct numerical simulations of three-dimensional bubbly flows
(The American Institute of Physics, 1999-08)
Direct numerical simulations of the motion of many buoyant bubbles are presented. The Navier–Stokes equation is solved by a front tracking/finite difference method that allows a fully deformable interface. The evolution ...
In situ texture monitoring for growth of oriented cubic boron nitride films
(The American Institute of Physics, 1999-02-15)
We report evidence for oriented growth of pure-phase cubic boron nitride on silicon (100) substrates. The films are deposited at high temperatures (up to 1200 °C) by reduced-bias ion-assisted sputtering. The growth technique ...
Evolution of evaporating Black Holes in a higher dimensional inflationary universe
(The American Institute of Physics, 1999-11-19)
Spherically symmetric Black Holes of the Vaidya type are examined in an asymptotically de Sitter, higher dimensional spacetime. The various horizons are identified and located. The structure and dynamics of such horizons ...
In situ thin-film texture determination
(The American Institute of Physics, 1999-02-15)
A kinematic theory of reflection high energy electron diffraction (RHEED) is presented for textured polycrystalline thin films. RHEED patterns are calculated for arbitrary texture situations and for any general crystallographic ...
Uptake of positron emission tomography tracers in experimental bacterial infections: a comparative biodistribution study of radiolabeled FDG, thymidine, l -methionine, 67 Ga-citrate, and 125 I-HSA
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1999-04)
The purpose of this study was to evaluate the localization of positron emission tomography (PET) tracers [2-deoxy-2-fluoro- d -glucose (FDG), thymidine, and l -methionine] in sites of bacterial infection, and to contrast ...
Identifying charge-exchange collision products within the ion-energy distribution of electrostatically accelerated plasmas
(The American Institute of Physics, 1999-07)
When used in flowing electrostatically accelerated plasmas, electrostatic energy analyzers, such as Retarding Potential Analyzers (RPA’s) or Cylindrical Mirror Analyzers (CMA’s), occasionally yield data which seem implausible: ...
Solutions of Penrose’s equation
(The American Institute of Physics, 1999-01)
The computational use of Killing potentials which satisfy Penrose’s equation is discussed. Penrose’s equation is presented as a conformal Killing–Yano equation and the class of possible solutions is analyzed. It is shown ...