We have experimentally studied the transient velocity overshoot dynamics of photoexcited carriers in GaAs for electric fields as great as 200 kV/cm. Time domain waveforms proportional to the velocity and the acceleration of carriers have been acquired? respectively, from guided and free-space radiating signals which contain terahertz frequency components. The measurements demonstrated that the ...

Let K be a global field of characteristic p ≥ 5 and let E/K be a non-isotrivial elliptic curve. For places v of K of good reduction for E, let Ev/kv be the reduction of E modulo v. Then Ev(kv) ' Z/dvZ × Z/dvevZ for positive integers dv , ev , uniquely determined by E and v. We study the distribution of dv and the growth of dvev as v varies over places of degree n and n→∞.

The devitrification of initially amorphous Ni80B20 has been studied by x-ray-absorption spectroscopy as a function of the annealing temperature. It is found that the full width at half maximum ~FWHM! of the main absorption peak at '850 eV is sensitive to the degree of amorphization of the specimen. The initial FWHM of 2.51 eV for the homogeneous amorphous Ni80B20 decreases to a value of 2.12 eV...

Recent progress in cosmic ray physics covering the energy range from about 10 eV to 10 eV is reviewed. The most prominent features of the energy spectrum are the so called ‘knee’ at E ≃ 3 · 10 eV and the ‘ankle’ at few 10 eV. Generally, the origin of the knee is understood as marking the limiting energy of galactic accelerators and/or the onset of increasing outflow of particles from the galaxy...

The biological relevance of extracellular vesicles (EV) in intercellular communication has been well established. Thus far, proteins and RNA were described as main cargo. Here, we show that EV released from human bone marrow derived mesenchymal stromal cells (BM-hMSC) also carry high-molecular DNA in addition. Extensive EV characterization revealed this DNA mainly associated with the outer EV m...

for absolute constants C6, C7. This theorem (almost) follows from [EV, Theorem 1.1], the only point being to control the dependence of implicit constants on the degree of the number field. We refer to [EV] for further information and for some motivational comments about the method. In the proof C1, C2, . . . will denote certain absolute constants. A.2. Let K be an extension of Q of degree d ≥ 2...

Cytokines are upregulated in prediabetes, but their relationship with Enterovirus (EV) infection and development of islet autoimmunity is unknown. Cytokines (n = 65) were measured using Luminex xMAP technology in a nested case-control study of 67 children with a first-degree relative with type 1 diabetes: 27 with islet autoantibodies (Ab(+)) and 40 age-matched persistently autoantibody negative...

The integration of electric vehicles (EV) into the smart grid is bounded by high variability of demand for electricity, unwillingness of consumers to change behavior as well as low degree of product familiarity. Especially the absence of real-time energy tariffs constrains the widespread use of EVs as sustainable alternatives to a combustion engine. We propose to explore the behavior of EV user...

BACKGROUND The aim of this study was to investigate the usefulness of contrast-enhanced ultrasonography (CEUS) in predicting of esophageal varices (EV) and assessing high-risk EV in patients with hepatitis B virus (HBV)-related cirrhosis. MATERIAL AND METHODS Patients with HBV-related cirrhosis who had undergone endoscopy were prospectively recruited. Hepatic dynamic CEUS was performed. Regions...