scholarly journals DEPENDENCE OF ELECTROSTATIC POTENTIAL ON THE TRANSPORTATION SPEED DURING AIR CHARGING

2020 ◽  
Vol 6 (2(71)) ◽  
pp. 39-42
Author(s):  
E.A. Acheeva ◽  
E.V. Lopushnyak ◽  
S.M. Lokyaeva
Keyword(s):  
Electrostatic Potential ◽  
Electric Potential ◽  
Basic Parameters ◽  
A Charge ◽  
Pneumatic Method ◽  
Transportation Speed

The wide use of pneumatic method of loading and portage of granular explosives (ВВ) at the conduct of mountain works specifies on the necessity of researches of defects concomitant to this method: namely an origin of electrification in a charge hose. Electric potential and charge are the basic parameters of the energy distinguished at a digit, the amount of warmth of thatgoes to the warming-up of VV. In the total, knowing the minimum temperatures of selfignition of a erodredges, it is possible to control the size ofelectric charge and exceeding of that conduces to the unplanned explosion.

scholarly journals Spectroscopic flat-fields can be used for precision CCD gain and noise tests

2021 ◽  
Vol 38 ◽  
Author(s):  
J. Gordon Robertson
Keyword(s):  
Ccd Camera ◽  
Matched Pair ◽  
Optical Fibres ◽  
Charge Coupled Device ◽  
Small Areas ◽  
Flat Field ◽  
Basic Parameters ◽  
The Mean ◽  
A Charge ◽  
Analogue To Digital

Abstract One of the basic parameters of a charge coupled device (CCD) camera is its gain, that is, the number of detected electrons per output Analogue to Digital Unit (ADU). This is normally determined by finding the statistical variances from a series of flat-field exposures with nearly constant levels over substantial areas, and making use of the fact that photon (Poisson) noise has variance equal to the mean. However, when a CCD has been installed in a spectroscopic instrument fed by numerous optical fibres, or with an echelle format, it is no longer possible to obtain illumination that is constant over large areas. Instead of making do with selected small areas, it is shown here that the wide variation of signal level in a spectroscopic ‘flat-field’ can be used to obtain accurate values of the CCD gain, needing only a matched pair of exposures (that differ in their realisation of the noise). Once the gain is known, the CCD readout noise (in electrons) is easily found from a pair of bias frames. Spatial stability of the image in the two flat-fields is important, although correction of minor shifts is shown to be possible, at the expense of further analysis.

Polarization-dependent electric potential distribution across nanoscale ferroelectric Hf0.5Zr0.5O2 in functional memory capacitors

Nanoscale ◽  
2019 ◽  
Vol 11 (42) ◽  
pp. 19814-19822 ◽  
Author(s):  
Yury Matveyev ◽  
Vitalii Mikheev ◽  
Dmitry Negrov ◽  
Sergei Zarubin ◽  
Abinash Kumar ◽  
...  
Keyword(s):  
Electrostatic Potential ◽  
Electric Potential ◽  
Potential Distribution ◽  
Standing Waves ◽  
Potential Profile ◽  
Electric Potential Distribution ◽  
Non Linear ◽  
Electrostatic Potential Profile

Using standing-waves in HAXPES technique, we reveal non-linear electrostatic potential profile across nanoscale ferroelectric (FE) HfZrO4 layer in memory capacitors for both polarization directions, implying the drift of non-FE charges at interfaces.

scholarly journals Kinetic photovoltage along semiconductor-water interfaces

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jidong Li ◽  
Yuyang Long ◽  
Zhili Hu ◽  
Jiyuan Niu ◽  
Tiezhu Xu ◽  
...  
Keyword(s):  
Electric Potential ◽  
Silicon Surface ◽  
Photovoltaic Effect ◽  
Potential Gradient ◽  
High Permittivity ◽  
Polar Liquids ◽  
Nonpolar Liquids ◽  
A Charge ◽  
Silicon Based ◽  
Silicon Hydrogel

AbstractExternal photo-stimuli on heterojunctions commonly induce an electric potential gradient across the interface therein, such as photovoltaic effect, giving rise to various present-day technical devices. In contrast, in-plane potential gradient along the interface has been rarely observed. Here we show that scanning a light beam can induce a persistent in-plane photoelectric voltage along, instead of across, silicon-water interfaces. It is attributed to the following movement of a charge packet in the vicinity of the silicon surface, whose formation is driven by the light-induced potential change across the capacitive interface and a high permittivity of water with large polarity. Other polar liquids and hydrogel on silicon also allow the generation of the in-plane photovoltage, which is, however, negligible for nonpolar liquids. Based on the finding, a portable silicon-hydrogel array has been constructed for detecting the shadow path of a moving Cubaris. Our study opens a window for silicon-based photoelectronics through introducing semiconductor-water interfaces.

Experimental Charge Density and Electrostatic Potential of Triglycine

1998 ◽  
Vol 54 (4) ◽  
pp. 485-493 ◽  
Author(s):  
V. Pichon-Pesme ◽  
C. Lecomte
Keyword(s):  
Electrostatic Potential ◽  
Electron Density Distribution ◽  
Crystal Data ◽  
Asymmetric Unit ◽  
X Ray Diffraction ◽  
X Ray ◽  
A Charge ◽  
Net Charges ◽  
Experimental Electron Density ◽  
Experimental Charge Density

The experimental electron density distribution in triglycine has been determined using single-crystal X-ray diffraction data at 123 K to a resolution of (sin θ/λ)max = 1.1 Å−1. Several multipolar pseudo-atom density refinements were performed against the 7238 observed data in order to estimate the net charges on the atoms. The electrostatic potential around the two molecules is calculated from the parameters derived from these refinements. A charge transfer between the two triglycine molecules of the asymmetric unit is discussed. Crystal data: C6H11N3O4, Mr = 189.2, triclinic, P1¯, Z = 4 (two molecules in the asymmetric unit), T = 123 K, a = 11.585 (1), b = 14.603 (2), c = 4.800 (4) Å, α = 89.28 (3), β = 95.55 (2), γ = 104.484 (8)°, V = 782.5 (7) Å3, Dx = 1.61 g cm−3, μ = 1.5 cm−1 for λMo = 0.7107 Å.

scholarly journals Existence of Dirichlet finite harmonic measures on Euclidean balls

1994 ◽  
Vol 133 ◽  
pp. 85-125 ◽  
Author(s):  
Mitsuru Nakai
Keyword(s):  
Riemannian Manifold ◽  
Electrostatic Potential ◽  
Finite Energy ◽  
The Other ◽  
Potential Difference ◽  
Ideal Boundary ◽  
Noncompact Riemannian Manifold ◽  
Harmonic Measures ◽  
A Charge ◽  
The Ideal

Divide the ideal boundary of a noncompact Riemannian manifold M into two parts δ0 and δ1 Viewing that M is surrounded by two conducting electrodes δ0 and δ1 we ask whether (M; δ0, δ1) functions as a condenser in the sense that the unit electrostatic potential difference between two electrodes is produced by putting a charge of finite energy on one electrode when the other is grounded. The generalized condenser problem asks whether there exists a subdivision δ0 ∪ δ1 of the ideal boundary of M such that (M; δ0, δ1 functions as a condenser.

scholarly journals Method of Images for a Charge inside a Three-Layer Medium and Implementation of a Dirichlet Border Condition

2020 ◽  
Vol 44 (2) ◽  
pp. 7-14
Author(s):  
Fausto Valencia ◽  
Hugo Arcos
Keyword(s):  
Boundary Condition ◽  
Finite Element ◽  
Electric Field ◽  
Boundary Conditions ◽  
Electric Potential ◽  
Finite Element Simulations ◽  
Method Of Images ◽  
Layer Medium ◽  
A Charge ◽  
Good Agreement

A process to apply the method of images for a charge located in a three-layer medium is presented. The images are found according to the boundary conditions between the layers for the electric field. The characteristics of the electric potential are also considered, thus the number of unknown variables becomesa guide to set the image charges needed to solve the problem. The results are compared with finite element simulations through the use of the software FEMM 4.2, showing good agreement. The found limitations of the process are also noted, mainly in regards to the dependence of the images on the coordinates where the field is to be calculated. The model obtained was applied to different cases, where it was seen that it was not limited to three material media only. Finally, the null potential boundary condition was applied, showing how the method of images could be applied to this type of problems.

Insight into the chemical bonding and electrostatic potential: A charge density study on a quinazoline derivative

2013 ◽  
Vol 54 (6) ◽  
pp. 1012-1017
Author(s):  
A. Tojiboev ◽  
R. Wang ◽  
F. Pan ◽  
U. Englert ◽  
K. Turgunov ◽  
...  
Keyword(s):  
Charge Density ◽  
Electrostatic Potential ◽  
Chemical Bonding ◽  
Quinazoline Derivative ◽  
A Charge ◽  
Density Study ◽  
Insight Into
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