Results 61 to 70 of about 1,571,569 (201)

Analytical solutions of bound timelike geodesic orbits in Kerr spacetime

open access: yes, 2012
We derive the analytical solutions of the bound timelike geodesic orbits in Kerr spacetime. The analytical solutions are expressed in terms of the elliptic integrals using Mino time $\lambda$ as the independent variable.
  +12 more
core   +1 more source

Variational analysis of self-focusing of intense ultrashort pulses in gases [PDF]

open access: yes, 2005
By using perturbation theory we derive an expression for the electrical field of a Gaussian laser pulse propagating in a gas medium. This expression is used as a trial solution in a variational method to get quasianalytical solutions for the width ...
A. Becker   +3 more
core   +1 more source

Analytical Expression for Low-dimensional Resonance Island in 4-dimensional Symplectic Map

open access: yes, 2005
We study a 2- and a 4-dimensional nearly integrable symplectic maps using a singular perturbation method. Resonance island structures in the 2- and 4- dimensional maps are successfully obtained.
Goto, Shin-itiro
core   +1 more source

Hyperradiance from Soliton Oscillators Synchronized by Capacitive or Inducitve Coupling [PDF]

open access: yes, 1993
The output power from coupled Josephson oscillators is investigated when the junctions are operated in their single fluxon mode. We demonstrate that both inductive and capacitive coupling mechanisms can give rise to hyperradiance when the power is ...
Blackburn, James A.   +1 more
core   +1 more source

Innermost stable circular orbits around magnetized rotating massive stars

open access: yes, 2010
In 1998, Shibata and Sasaki [Phys. Rev. D 58, 104011 (1998)] presented an approximate analytical formula for the radius of the innermost stable circular orbit (ISCO) of a neutral test particle around a massive, rotating and deformed source.
F. L. Dubeibe   +10 more
core   +1 more source

ESTIMATIONS OF HEAT CAPACITIES FOR ACTINIDE DIOXIDE: UO2, NpO2, ThO2, AND PuO2

open access: yesNuclear Engineering and Technology, 2014
The evaluation of thermal properties of actinide oxide fuels is a problem of high importance for the development of new generation reactors. In the present study, an expression obtained for n-dimensional Debye functions is used to derive a simple ...
E. ESER, H. KOC, M. GOKBULUT, G. GURSOY
doaj   +1 more source

Optimal entanglement generation in cavity QED with dissipation

open access: yes, 2009
We investigate a two-level atom coupled to a cavity with a strong classical driving field in a dissipative environment and find an analytical expression of the time evolution density matrix for the system.
Xu, Jing-Bo, Zhang, Jian-Song
core   +1 more source

Polaron Energy Spectrum in Quantum Dots

open access: yes, 2003
Energy spectrum of a weak coupling polaron is considered in a cylindrical quantum dot. An analytical expression for the polaron energy shift is obtained using a modified pertubation theory.Comment: 7 pages, IOP style LaTeX ...
Bogolubov N. N.   +2 more
core   +1 more source

The Influence of the Site of Recording and Benchtop and Portable NIRS Equipment on Predicting the Sensory Properties of Iberian Ham

open access: yesFoods
Iberian ham is a Spanish product that is highly prized for its unique sensory characteristics. The possibility of predicting these characteristics using non-invasive methods is therefore of great interest.
Isabel Revilla   +7 more
doaj   +1 more source

Exact pairwise error probability analysis of space-time codes in spatially correlated fading channels

open access: yesJournal of Telecommunications and Information Technology, 2006
In this paper, we derive an analytical expression for the exact pairwise error probability (PEP) of a space-time coded system operating over a spatially correlated slow fading channel using a moment-generating function-based approach.
Tharaka A. Lamahewa   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy