نتایج جستجو برای: boltzman equation

تعداد نتایج: 229794  

1997
Zhijian Tao

We demonstrate that if the universe is dominated by the massive cold dark matter, then besides the generally believed thermal distribution of the dark matter relics, there may exist some very energetic non-thermal relics of the dark matter particles in the universe from some unknown sources, such as from decay of supermassive X particle released from topological defect collapse or annihilation....

Journal: :Journal of neurophysiology 1997
H Widmer H Amerdeil P Fontanaud M G Desarménien

Action potentials and voltage-gated currents were studied in acutely dissociated neurosecretory cells from the rat supraoptic nucleus during the first three postnatal weeks (PW1-PW3), a period corresponding to the final establishment of neuroendocrine relationships. Action potential duration (at half maximum) decreased from 2.7 to 1.8 ms; this was attributable to a decrease in decay time. Appli...

2006
H. Nagahara K. Ozawa

Introduction: Recent observation by infrared spectroscopy has revealed the presence of amorphous and/or crystalline silicate dusts around evolved stars or young star discs [e.g., 1-4]. The species, size, shape, composition, and orientation if they are crystalline, of the dusts control the optical properties of dusts, which further control the radiation field of discs. Thus, the formation and gr...

2005
Hideo Hasegawa

In recent years, much study has been made by applying the non-extensive statistics (NES) to various non-extensive systems where the entropy and/or energy are not necessarily proportional to the number of their constituent subsystems. The non-extensivity may be realized in many systems such as physical, chemical and biological ones, and also in small-scale systems. After briefly reviewing the re...

1998
Alexander Kusenko Gino Segrè Alexander Vilenkin

A small asymmetry in the flux of neutrinos emitted by a hot newly-born neutron star could explain the observed motions of pulsars. However, even in the presence of parity-violating processes with anisotropic scattering amplitudes, no asymmetry is generated in thermal equilibrium. We explain why this no-go theorem stymies some of the proposed explanations for the pulsar “kick” velocities. CERN-T...

Journal: :The Journal of physiology 1989
D A Coulter J R Huguenard D A Prince

1. Calcium currents were recorded with whole-cell voltage-clamp procedures in relay neurones of the rat thalamus which had been acutely isolated by an enzymatic dissociation procedure. 2. Low-threshold and high-threshold Ca2+ currents were elicited by depolarizing voltage steps from holding potentials more negative than -60 mV. A transient current, analogous to the T-current in sensory neurones...

Journal: :journal of linear and topological algebra (jlta) 2012
h. r. rezazadeh m maghasedi b shojaee

in this paper, we intend to solve special kind of ordinary differential equations which is called heun equations, by converting to a corresponding stochastic differential equation(s.d.e.). so, we construct a stochastic linear equation system from this equation which its solution is based on computing fundamental matrix of this system and then, this s.d.e. is solved by numerically methods. mo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه محقق اردبیلی - دانشکده علوم 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم ریاضی 1387

چکیده ندارد.

Journal: :J. Comput. Meth. in Science and Engineering 2012
Gene West Gino Amato

While stressing the need for additional independent verifications, in this paper we provide: 1) Confirmatory measurements of Santilli’s 1991 hypothesis of the anomalous IsoRedShift (IRS) for the propagation of a blue laser light in a 60 ft ≈ 18 m long steel pipe containing air at a maximum of 70◦F ≈ 21◦C and at 2,000 psi ≈ 137 bars without any relative motion between the source, the medium and ...

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