نتایج جستجو برای: beta beam
تعداد نتایج: 299514 فیلتر نتایج به سال:
BACKGROUND AND PURPOSE The present study examined the long-term presence of beta-amyloid precursor protein (APP) and beta-amyloid (Abeta) accumulation in the rat thalamus after focal cerebral ischemia. METHODS Male Wistar rats were subjected to transient middle cerebral artery occlusion (MCAO) for 2 hours. Sensorimotor outcome was assessed using a tapered/ledged beam-walking task after operat...
The Californium Rare Ion Breeder Upgrade (CARIBU) of the ATLAS superconducting linac facility aims at providing low-energy and reaccelerated neutron-rich radioactive beams to address key nuclear physics and astrophysics questions. These beams are obtained from fission fragments of a Cf-252 source, thermalized and collected into a low-energy particle beam by a helium gas catcher, mass analyzed b...
Abstract Simulations exploring neutral beam operation in Wendelstein 7-X (W7- X) at reduced magnetic field are performed using a newly implemented gyro orbit model the BEAMS3D code. Operation strengths below nominal 2.5 T seen as path to explore both high beta plasmas and means access configurations not possible 2.5T. As strength becomes smaller, radius for 55 keV fast protons grows from ∼1 cm ...
ظهور تکنولوژی های مهم ارتباطی بخصوص اینترنت، تحولاتی سریع و شگرفی در نوع روابط و تعاملات اجتماعی جامعه ایجاد کرده است. پیوندها و مشغولیت اجتماعی در جوامع گذشته که مبتنی بر روابط خانوادگی، روابط همسایگی و اجتماع محلی بود تغییر و تحول اساسی یافته است. اینترنت با ایجاد فضایی بدون محدودیت زمان و مکان، شرایط و زمینه را برای پیدایش نوع جدیدی از ارتباطات اجتماعی (راه دور ) فراهم ساخته است و مشغولیت اج...
background beta-lactam resistance in gram-negative bacteria, especially escherichia coli, is a main clinical problem. it is often caused by the co-production of β-lactamases, particularly extended-spectrum β-lactamases (esbls) and ampc enzymes. it may lead to a problem for diagnosis via recommended phenotypic tests by the clinical and laboratory standards institute (clsi). conversely, β-lactama...
This paper describes a model of local distribution of liquid water (or steam) saturation in a fractured layer. The model, based on the Bernoulli trials as a probability density function of saturation, gives the following relation between the average value of the relative permeability for the water phase, k-, and the arithmetical mean of saturation, S, : where rn is an index representing the non...
Solar wind observations have shown that the drift velocity of proton beam relative to background is order local Alfvén velocity. The proton-beam instability has been suggested play an important role in decelerating beams. Most existing studies examined kinetic properties simple Maxwellian or drift-Maxwellian plasmas. In this paper, we systemically investigate effects temperature anisotropy on g...
Spectral index of synchrotron emission: insights from the diffuse and magnetised interstellar medium
The interpretation of Galactic synchrotron observations is complicated by the degeneracy between strength magnetic field perpendicular to line sight (LOS), $B_\perp$, and cosmic-ray electron (CRe) spectrum. Depending on observing frequency, an energy-independent spectral energy slope $s$ for CRe spectrum usually assumed: $s=-2$ at frequencies below $\simeq$400 MHz $s=-3$ higher frequencies. Mot...
Let β > 1 and let m > β be an integer. Each x ∈ Iβ := [0, m−1 β−1 ] can be represented in the form x = ∞ ∑ k=1 εkβ , where εk ∈ {0, 1, . . . ,m − 1} for all k (a β-expansion of x). It is known that a.e. x ∈ Iβ has a continuum of distinct β-expansions. In this paper we prove that if β is a Pisot number, then for a.e. x this continuum has one and the same growth rate. We also link this rate to th...
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