On chain models for contact electrification

2022 ◽  
Author(s):  
Javier E. Hasbun ◽  
Lok C Lew Yan Voon ◽  
Morten Willatzen
Keyword(s):  
Matrix Element ◽  
Transfer Matrix ◽  
Analytical Model ◽  
Alloy System ◽  
Chain Model ◽  
Charge Dynamics ◽  
Contact Electrification ◽  
Atomic Chains ◽  
A Chain ◽  
Electron Interactions

Abstract An exact analytical model of charge dynamics for a chain of atoms with asymmetric hopping terms is presented. Analytic and numeric results are shown to give rise to similar dynamics in both the absence and presence of electron interactions. The chain model is further extended to the case of two atoms per cell (a perfect alloy system). This extension is further applied to contact electrification between two different atomic chains and the effect of increasing the magnitude of the contact transfer matrix element is studied.

A chain model for chromosomes

1961 ◽  
Vol 58 ◽  
pp. 1072-1077 ◽  
Author(s):  
Frank Stahl
Keyword(s):  
Chain Model ◽  
A Chain

Ab initiostudy on a chain model of theCr8molecular magnet

2008 ◽  
Vol 77 (22) ◽  
Author(s):  
D. M. Tomecka ◽  
V. Bellini ◽  
F. Troiani ◽  
F. Manghi ◽  
G. Kamieniarz ◽  
...  
Keyword(s):  
Chain Model ◽  
A Chain

scholarly journals О декорировании зигзагообразных краев наноленты эпитаксиального графена

2019 ◽  
Vol 61 (3) ◽  
pp. 610
Author(s):  
С.Ю. Давыдов
Keyword(s):  
Density Of States ◽  
Tight Binding ◽  
Free State ◽  
Band Spectrum ◽  
Adsorption Complex ◽  
Chain Model ◽  
Double Chain ◽  
Occupation Numbers ◽  
A Chain ◽  
Analytical Expressions

AbstractA double-chain model of an epitaxial graphene nanoribbon, the zigzag edges of which are decorated with foreign adparticles, has been proposed. The substrate is assumed to be a metal. Analytical expressions for the Green’s functions of carbon adatoms and adparticles are obtained. The band spectrum for the free state is determined, and the approximation of the density of states is proposed. Analytical expressions for the occupation numbers in the mode of tight binding between the adsorption complex and the substrate are presented. A chain of carbon adatoms decorated with adparticles (epicarbyne) is considered.

A Chain Modeling Approach To Estimate the Impact of Soil Cadmium Pollution on Human Dietary Exposure

2008 ◽  
Vol 71 (12) ◽  
pp. 2504-2513 ◽  
Author(s):  
EELCO FRANZ ◽  
PAUL RÖMKENS ◽  
LEO van RAAMSDONK ◽  
INE van der FELS-KLERX
Keyword(s):  
Soil Contamination ◽  
Human Exposure ◽  
Soil Characteristics ◽  
Cadmium Exposure ◽  
Chain Model ◽  
Animal Products ◽  
Contamination Levels ◽  
A Chain ◽  
Animal Exposure ◽  
Dietary Cadmium

Cadmium in soil poses a risk for human health, due to its accumulation in food and feed crops. The extent of accumulation depends strongly on soil type and the degree of pollution. The objective of the present study was to develop a predictive model to estimate human dietary cadmium exposure from soil characteristics. This chain model consists of three basic steps: (i) calculation of plant cadmium levels from soil contamination levels and soil characteristics, (ii) calculation of animal transfer from consumption and contamination levels, and (iii) human exposure from both plant and animal products. Six soil scenarios were assessed, reflecting a specific contaminated region and ranging from 0.5 mg/kg of Cd (pH 4.5) to 2.5 mg/kg of Cd (pH 5.5). Cadmium levels in feed crops and vegetables were estimated with regression and mathematical models. Animal exposure and transfer to cattle kidneys, livers, and meat were calculated using a consumption database and a parameterized linear simulation model. Human exposure was estimated by Monte Carlo simulation, using a consumption database. The median human exposure for the different scenarios ranged from 0.24 to 0.98 μ/kg of body weight per day, which is comparable to results obtained from exposure levels based on observed field contamination data. The study shows that a chain model approach from soil contamination to human exposure, including animal exposure and transfer to animal products, can successfully be applied. The model can be used for fast evaluation of dietary cadmium exposure and the identification of risk areas based on soil conditions.

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