نتایج جستجو برای: kappa distribution

تعداد نتایج: 639761  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم و فنون مازندران 0

مدل روزنه های موازی موج دار (corrugated oarallel bundle model) برای تعریف اثر ساختمان روزنه ها در نفوذ-واکنش (diffusion and reaction) در کاتالیستهای متخلخل بکار می رود. در مدل روزنه های موج دار، از یک دسته روزنه های اصلی (pore) استفاده شده است . هر یک از این روزنه های اصلی دارای یکسری عناصر روزنه می باشد که هر عنصر دارای یک شعاع تعیین شده به صورت اتفاقی از یک توزیع اندازه روزنه ها (pore size di...

Journal: :Journal of Statistical Mechanics: Theory and Experiment 2021

For finite quantum many-particle systems modeled with say $m$ fermions in $N$ single particle states and interacting $k$-body interactions ($k \leq m$), the wavefunction structure is studied using random matrix theory. Hamiltonian for system chosen to be $H=H_0(t) + \lambda V(k)$ unperturbed $H_0(t)$ being a $t$-body operator $V(k)$ interaction strength $\lambda$. Representing by independent Ga...

1998
Chun-yu Ma Danny Summers

A non-relativistic Fokker-Planck equation for the electron distribution function is formulated incorporating the effects of stochastic acceleration by whistlermode waves and Coulomb collisions. The stationary solution f to the equation, subject to a zero-flux boundary condition, is found to be a generalized Lorentzian (or kappa) distribution, which satisfies f ∝ v for large velocity v, where κ ...

Journal: :The Journal of Experimental Medicine 1993
C A Medina J M Teale

To determine the extent of kappa chain diversity in the preimmune repertoire early in development, kappa cDNA libraries were analyzed from 15-d old fetal omentum, 18-d-old fetal liver, and 3-wk old bone marrow. An anchored polymerase chain reaction approach was used to avoid bias for particular V kappa families. From the sequence analysis of 27 bone marrow clones, 10 different families and 20 u...

2010
Li-qin Wang Xue-wen Yu Chun-fang Yan Xiang Wang

The nuclear factor kappa B is widely expressed in the distinct subpopulations of chorionic villi and deciduas of first-trimester pregnancies. We examined the cellular distribution and expression of nuclear factor kappa B in the human first-trimester chorionic villi and deciduas of women with early spontaneous miscarriage and viable pregnancy by confocal laser scanning microscope and immunohisto...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2002
G Kaniadakis

In Ref. [Physica A 296, 405 (2001)], starting from the one parameter deformation of the exponential function exp(kappa)(x)=(sqrt[1+kappa(2)x(2)]+kappax)(1/kappa), a statistical mechanics has been constructed which reduces to the ordinary Boltzmann-Gibbs statistical mechanics as the deformation parameter kappa approaches to zero. The distribution f=exp(kappa)(-beta E+betamu) obtained within this...

2005
M. P. Leubner

The probability distributions (PDFs) of the differences of any physical variable in the intermittent, turbulent interplanetary medium are scale dependent. Strong non-Gaussianity of solar wind fluctuations applies for short time-lag spacecraft observations, corresponding to small-scale spatial separations, whereas for large scales the differences turn into a Gaussian normal distribution. These c...

Journal: :Frontiers in Physics 2021

The quantum version of Olbert's kappa distribution applicable to fermions is obtained. Its construction straightforward but requires recognition the differences in nature states separated by Fermi momenta. complement, bosonic also given, as procedure how construct a hypothetical kappa-anyon distribution. At very low temperature degenerate yields kappa-modified ordinary energy and momentum. We p...

1998
A. Olsson P. Janhunen

We study the question of what di€erence it makes for the derived ®eld-aligned conductance (K) values if one uses Maxwellian or kappa distributions for the ®tting of low-orbiting satellite electron ̄ux spectra in the auroral region. This question has arisen because sometimes a high-energy tail is seen in the spectra. In principle, the kappa ®ts should always be better, because the kappa distribu...

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