Results 1 to 10 of about 266,119 (301)

Alternate approaches to vibration and shock analysis using NASTRAN [PDF]

A method that derives an approximate equivalent static load to a base excitation shock analysis is described. The transient analysis in the current level of NASTRAN, level 16, does not directly provide for either input acceleration forcing functions or ...
Denver, R. E., Menichello, J. M.
core   +1 more source

Photo-excited semiconductor superlattices as constrained excitable media: Motion of dipole domains and current self-oscillations

, 2009
A model for charge transport in undoped, photo-excited semiconductor superlattices, which includes the dependence of the electron-hole recombination on the electric field and on the photo-excitation intensity through the field-dependent recombination ...
H. T. Grahn, H. T. Grahn, J. I. Arana, J. P. Keener, L. L. Bonilla, L. L. Bonilla, L. L. Bonilla, Y. Kuramoto   +7 more
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Density and spin response function of a normal Fermi gas at unitarity

, 2008
Using Landau theory of Fermi liquids we calculate the dynamic response of both a polarized and unpolarized normal Fermi gas at zero temperature in the strongly interacting regime of large scattering length. We show that at small excitation energies the {\
D. Pines, L. Pitaevskii, S. Stringari
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Quantum phase transition in a two-dimensional system of dipoles

, 2007
The ground-state phase diagram of a two-dimensional Bose system with dipole-dipole interactions is studied by means of quantum Monte Carlo technique. Our calculation predicts a quantum phase transition from gas to solid phase when the density increases ...
A. S. Arkhipov, G. E. Astrakharchik, H. P. Büchler, I. L. Kurbakov, J. Boronat, Yu. E. Lozovik, Yu. E. Lozovik, Yu. E. Lozovik   +7 more
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Inverse Modeling of Nonlinear Artificial Muscle Using Polynomial Parameterization and Particle Swarm Optimization

Advances in Materials Science and Engineering, 2020
The properties of pneumatic artificial muscle (PAM) with excellent power-to-weight ratio and natural compliance made it useful for healthcare engineering applications.
Mohd Azuwan Mat Dzahir, Shin-ichiroh Yamamoto   +1 more
doaj   +1 more source

Trapped-ion quantum simulation of excitation transport: disordered, noisy, and long-range connected quantum networks

, 2017
The transport of excitations governs fundamental properties of matter. Particularly rich physics emerges in the interplay between disorder and environmental noise, even in small systems such as photosynthetic biomolecules.
Hauke, Philipp, Trautmann, Nils
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Dynamics Characteristic Analysis of a Spur Gear based on Measured Tooth Surface Error

Jixie chuandong, 2018
Gear tooth surface error is main excitation source of vibration and noise in gear system. In order to study the influence of tooth surface error on gear system,the static transmission error is calculated for gear system with measured errors such as ...
Chen Siyu, Bai Fan, Tang Jinyuan
doaj  

Environment-assisted quantum transport in a 10-qubit network

, 2018
The way in which energy is transported through an interacting system governs fundamental properties in many areas of physics, chemistry, and biology.
Blatt, Rainer, Brydges, Tiff, Hauke, Philipp, Hempel, Cornelius, Jurcevic, Petar, Lanyon, Ben P., Maier, Christine, Roos, Christian F., Trautmann, Nils   +8 more
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Simulation of attosecond transient soft x-ray absorption in solids using generalized Kohn–Sham real-time time-dependent density functional theory

New Journal of Physics, 2020
Time-dependent density functional theory (TDDFT) simulations of transient core-level spectroscopies require a balanced treatment of both valence- and core-electron excitations.
C D Pemmaraju
doaj   +1 more source

Correlated fluctuations in the exciton dynamics and spectroscopy of DNA

, 2010
The absorption of ultraviolet light creates excitations in DNA, which subsequently start moving in the helix. Their fate is important for an understanding of photo damage, and is determined by the interplay of electronic couplings between bases and the ...
Arend G Dijkstra, Dijkstra A G, Malyshev A V, Mukamel S, Yoshitaka Tanimura   +4 more
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