Results 61 to 70 of about 150,813 (163)

Kappa distribution in the presence of a potential energy

Journal of Geophysical Research: Space Physics, 2015
AbstractThe present paper develops the theory and formulations of the kappa distributions that describe particle systems characterized by a nonzero potential energy. As yet, kappa distributions were used for the statistical description of the velocity or kinetic energy of particles but not of the potential energy.
openaire   +1 more source

Characteristics of Nonthermal Dupree Diffusion on Space-Charge Wave in a Kappa Distribution Plasma Column with Turbulent Diffusion. [PDF]

Entropy (Basel), 2020
Lee MJ, Jung YD.
europepmc   +1 more source

An approximate Kappa generator for particle simulations

Earth, Planets and Space
A random number generator for the Kappa velocity distribution in particle simulations is proposed. Approximating the cumulative distribution function with the q-exponential function, an inverse transform procedure is constructed.
Seiji Zenitani, Takayuki Umeda
doaj   +1 more source

On the Stochastic Dynamics for the Regularized Kappa-Distributed Plasmas

Entropy
The generalized fluctuation–dissipation relations that produce the regularized Kappa distributions are studied. The two-variable Fokker–Planck equation, as well as its reductions in the absence of potential and in the overdamped limit, are considered. All these Fokker–Planck equations have the regularized Kappa distributions as the stationary solutions
openaire   +3 more sources

Flare-accelerated Electrons in the Kappa Distribution from X-Ray Spectra with the Warm-target Model

The Astrophysical Journal
X-ray observations provide important and valuable insights into the acceleration and propagation of nonthermal electrons during solar flares. Improved X-ray spectral analysis requires a deeper understanding of the dynamics of energetic electrons ...
Yingjie Luo, Eduard P. Kontar, Debesh Bhattacharjee   +2 more
doaj   +1 more source

Thermodynamic Constraints on Solar Wind Radial Profiles

The Astrophysical Journal
In this paper, we use thermodynamics to develop the radial density profile of the solar wind, which is described by kappa distributions. First, we show the connection of kappa distributions with polytropic processes, emphasizing the two “paths”—i.e., a ...
G. Livadiotis, D. J. McComas
doaj   +1 more source

Molecularly imprinted multilayer nanoparticles for selective detection of kappa-casein Cancer biomarkers: Synthesis, characterisation, and rebinding studies

Sensing and Bio-Sensing Research
This study reports surface-molecularly imprinted, multilayer core-shell Fe₃O₄ nanoparticles for the selective recognition of kappa-casein, a biomarker of interest in tumour-related diagnostics.
Onesmus Munyati, Robert Singogo, James Nyirenda, Phenny Mwaanga   +3 more
doaj   +1 more source

Boltzmann–Poisson Theory of Nonthermal Self-gravitating Gases, Cold Dark Matter, and Solar Atmosphere

The Astrophysical Journal
Space and astrophysical plasmas or gases can reach various states of thermal or nonthermal quasi-equilibrium, depending on the collisional age of the observed system.
L.-N. Hau, C.-K. Chang, M. Lazar, S. Poedts   +3 more
doaj   +1 more source

A comparative analysis of L-moments, maximum likelihood, and maximum product of spacing methods for the four-parameter kappa distribution in extreme value analysis. [PDF]

Sci Rep
Khan MSUR, Hussain Z, Sher S, Amjad M, Baig F, Ahmad I, Ullah H.   +6 more
europepmc   +1 more source

Influence of angle kappa and angle alpha on visual outcomes after implantation of a nondiffractive extended-depth-of-focus intraocular lens: a prospective observation study. [PDF]

BMC Ophthalmol
Wu N, Yao Y, Zhou B, Liu S, Zhang Y, Wang X.   +5 more
europepmc   +1 more source