نتایج جستجو برای: electrical polarity detector
تعداد نتایج: 274392 فیلتر نتایج به سال:
Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article we...
The article presents the probabilistic-statistical modeling of surface roughness in process electric discharge grinding with variable polarity electrodes. correlation between modes machining and indicators quality machined was established. A model part formed during is obtained, which establishes high-altitude parameters electrical modes. developed makes it possible to calculate height dependin...
Compton scattering is one of the dominant interaction processes in germanium for photons with an energy of around two MeV. If a photon scatters only once inside a germanium detector, the resulting event contains only one electron which normally deposits its energy within a mm range. Such events are similar to Ge neutrinoless double beta-decay (0νββ) events with just two electrons in the final s...
The noise performance of an infrared injection photon detector with very high internal gain was investigated at a wavelength of 1.55 mum. The devices showed sub-Poissonian shot noise with Fano factors around 0.55 at 0.7 V at room temperature. Optical to electrical conversion factors of 3000 electrons per absorbed photon were recorded at 0.7 V. The change in noise-equivalent power with respect t...
In this study, an integrated in situ remediation technique which couples electrokinetics with adsorption, using locally produced granular activated carbon from date palm pits in the treatment zones that are installed directly to bracket the contaminated soils at bench-scale, is investigated. Natural saline-sodic clay soil, spiked with contaminant mixture (kerosene, phenol, Cr, Cd, Cu, Zn, Pb, a...
An electrical and optical responsive chemical-semiconductor gas sensor is developed using Cu(I) halides with a phase transition mechanism. materials exhibit reversible transitions between the Cs3Cu2I5 CsCu2I3 different properties, owing to formation/destruction of Cs–I Cu–Cu bonding when hydroxyl groups are attached/detached. Among various toxic atmospheric gases, Cu(I)-based has high selectivi...
Cardiac memory is an electrophysiological property that expressed as persistent changes in response to variations the rate and sequence of cardiac electric activation defined T wave on electrocardiogram after a period rhythms wide QRS widened, becomes evident once normal ventricular pattern restored.1 The first evidence its existence arises from case reports where polarity were observed transie...
The study of nucleic acids in low-polarity environments paves the way for novel biotechnological applications of DNA. Here, we use a repertoire of atomistic molecular simulation tools to study the nature of DNA when placed in a highly apolar environment and when transferred from aqueous to apolar solvent. Our results show that DNA becomes stiffer in apolar solvents and suggest that highly negat...
Measuring aerosols and molecular clusters below the 3 nm size limit is essential to increase our understanding of new particle formation. Instruments for the detection of sub-3 nm aerosols and clusters exist and need to be carefully calibrated and characterized. So far calibrations and laboratory tests have been carried out using mainly electrically charged aerosols, as they are easier to handl...
We study the electric double layer by combining the effects of ion finite size and dielectric decrement. At high surface potential, both mechanisms can cause saturation of the counter-ion concentration near a charged surface. The modified Grahame equation and differential capacitance are derived analytically for a general expression of a permittivity ε(n) that depends on the local ion concentra...
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