Now showing items 61-70 of 376
Topological Chaos and Periodic Braiding of Almost-Cyclic Sets
(American Physical Society, 2011-03-18)
In certain (2 + 1)-dimensional dynamical systems, the braiding of periodic orbits provides a framework for analyzing chaos in the system through application of the Thurston-Nielsen classification theorem. Periodic orbits ...
Non-coalescence of jets
(American Institute of Physics, 2011-09-01)
Numerical investigation of pulsatile flow in endovascular stents
(American Institute of Physics, 2013-09-01)
The flow in a plane channel with two idealized stents (one Lambda-shaped, the other X-shaped) is studied numerically. A periodic pressure gradient corresponding to one measured in the left anterior descending coronary ...
Improvement of temperature-stability in a quantum well laser with asymmetric barrier layers
(AIP Publishing, 2012-01-01)
We fabricated and tested a quantum well laser with asymmetric barrier layers. Such a laser has been proposed earlier to suppress bipolar carrier population in the optical confinement layer and thus to improve temperature-stability ...
Upper limit for the modulation bandwidth of a quantum dot laser
(AIP Publishing, 2010-05-01)
We derive a closed-form expression for the upper limit for the modulation bandwidth of a semiconductor quantum dot (QD) laser. The highest possible bandwidth increases directly with overlap integral of the electron and ...
(AIP Publishing, 2013-08-01)
In this study, we demonstrated superconductivity in a fiber with a lead core and fused silica cladding. The fibers were fabricated via a melt-draw technique and maintained overall diameters ranging from 200-900 mu m and ...
Resonant manifestation of intrinsic nonlinearity within electroelastic micropower generators
(AIP Publishing, 2010-12-01)
This letter investigates the nonlinear response of a bimorph energy harvester comprised of lead zirconate titanate (PZT-5A) laminates. For near resonant excitations, we demonstrate significant intrinsic nonlinear behavior ...
Depth resolution enhancement in double-detection optical scanning holography
(Optical Society of America, 2013-05-01)
We propose an optical scanning holography system with enhanced axial resolution using two detections at different depths. By scanning the object twice, we can obtain two different sets of Fresnel zone plates to sample the ...
An empirical model of ground-level geomagnetic perturbations
(American Geophysical Union, 2013-03-01)
A new empirical model for predicting ground-level geomagnetic perturbations has been developed. This model is based on global measurements of the magnetic field at multiple stations in the Northern Hemisphere collected ...
Three dimensional character of whistler turbulence
(AIP Publishing, 2010-05-01)
It is shown that the dominant nonlinear effect makes the evolution of whistler turbulence essentially three dimensional in character. Induced nonlinear scattering due to slow density perturbation resulting from ponderomotive ...