Effects of Cross-Section Structure on the Dosimetric Response Functions for 0.4 to 10.0 MeV Neutrons in the ICRU Tissue Sphere

1986 ◽  
Vol 107 (2) ◽  
pp. 147 ◽  
Author(s):  
Jai Ki Lee ◽  
Arthur B. Chilton ◽  
Magdi Ragheb
Keyword(s):  
Cross Section ◽  
Response Functions ◽  
Section Structure

Theoretical study on photoemission of double-layer AlxGa1−xAs/GaAs nanocone array photocathode

2021 ◽  
Author(s):  
Yan Sun ◽  
Lei Liu ◽  
Zhisheng Lv ◽  
Xingyue Zhangyang ◽  
Feifei Lu ◽  
...  
Keyword(s):  
Cross Section ◽  
Light Trapping ◽  
Spectral Response ◽  
Circular Cross Section ◽  
Geometrical Parameters ◽  
Internal Electric Field ◽  
Surface Emission ◽  
The Difference ◽  
Section Structure ◽  
Light Capture

In the design of photocathode, the internal electric field could be formed due to the graded Al compositional [Formula: see text] nanostructure, which can improve the top surface emission probability of carriers. In this paper, [Formula: see text] nanostructure array photocathode composed of two sub-layers is presented. Based on the finite element method, the influence of graded geometrical parameters on their optoelectronic characteristics is investigated. The results show that when the thickness of the sublayer is equal, the difference of the Al composition between the two sublayers of nanostructure is larger, the sub-layers are less, and the quantum efficiency is higher. The light capture ability of the photocathode can be enhanced by increasing the thickness and the array spacing of the first sublayer. Compared with the hexagonal cross-section structure, the light trapping effect and spectral response of the circular cross-section structure are better.

On the Cross-Section Structure of the Mitochondrial Cristae-Membrane as Revealed by X-Ray Diffraction

1976 ◽  
Vol 31 (9-10) ◽  
pp. 612-621 ◽  
Author(s):  
W Müller-Klieser ◽  
W Kreutz
Keyword(s):  
Cross Section ◽  
Function Evaluation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Section Profile ◽  
The Cross ◽  
Diffraction Patterns ◽  
Cross Section Profile ◽  
Section Structure ◽  
Q Function

Abstract Mitochondria were isolated using sorbitol and high buffer concentration in the medium. X-ray diffraction patterns arising from the mitochondrial cristae-membrane were recorded in the fully dried state and in two different states in humidity. The Q-function evaluation of these X-ray dif­fraction diagrams resulted in electron density cross-section profiles, which consist of two main peaks of opposite sign and one, respectively two, smaller peaks. The total thickness of the membrane amounts to 120 Å in the dry and 140 Å to 160 Å in the wet state.An interpretation of the cross-section profile is tentatively proposed.

scholarly journals Experimental tests of vehicle body accelerations at selected road and rail crossings

2019 ◽  
Vol 254 ◽  
pp. 04002 ◽  
Author(s):  
Konrad J. Waluś ◽  
Jakub Polasik ◽  
Janusz Mielniczuk ◽  
Łukasz Warguła
Keyword(s):  
Cross Section ◽  
Experimental Tests ◽  
The Body ◽  
Geometric Parameters ◽  
Vehicle Body ◽  
Delivery Vehicle ◽  
Dynamic Reaction ◽  
Level Crossing ◽  
Level Crossings ◽  
Section Structure

Vehicles moving across the railway are exposed to the dynamic reaction of unevenness of surface on those level crossing. This significantly influences on the increase of the acceleration as well as forces values transferred to the body of the car. These values depend to extent on the geometric parameters of level crossing as well as on the characteristics of the car tires and suspension. The paper presents the results of experimental tests of a small delivery vehicle crossing selected level crossings with a diversified geometric cross-section structure.

A Practical Estimation of Frequency Response Functions for System Decoupling Indirectly Using a Variable Cross Section Rod

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Jun Wang ◽  
Tian-Ya Meng ◽  
Ming-Yu Li ◽  
Teik C. Lim ◽  
Wen-Xuan Kuang
Keyword(s):  
Frequency Response ◽  
Cross Section ◽  
Low Frequency ◽  
Coupled System ◽  
Variable Cross Section ◽  
Probe Method ◽  
Variable Cross ◽  
Response Functions ◽  
Frequency Response Functions ◽  
Spatial Limitation

It is of high importance to be able to decouple a system to obtain the dynamic characteristics of its substructures; however, the necessary frequency response functions (FRFs) of the coupling interface are usually challenging to measure due to the limited accessible space and complex geometries. In this paper, a measurement technique in the decoupling process of a coupled system is proposed in order to obtain the FRFs at coupling interface. Specifically, a variable cross section rod is adopted to transmit the dynamic behavior of coupling interface. The proposed technique has three advantages: (a) the thick end with large cross section can provide enough area for applying excitation force like using impact hammer and/or setting up sensors; (b) the slender end with small cross section can break through the spatial limitation more easily; and (c) the convenience that no additional experimental setup is required but just using an available variable cross section rod. Vibrational equation of the variable cross section probe method is derived and then combined with the existing decoupling theories. Finally, the proposed probe method and the new decoupling theory combining probe theory are validated through numerical simulations (FEM) and laboratory experiments, respectively. The results show its great practicability in decoupling process especially in low frequency range.

Coal Mine Mobile Refuge Chamber with Square Cross Section Structure Finite Element Analysis

2012 ◽  
Vol 201-202 ◽  
pp. 308-311
Author(s):  
An Ning Zhang ◽  
Yu Ming Gu ◽  
Jin Jun Tai ◽  
Zhong Hui Yin ◽  
Xue Qun Fan ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Coal Mine ◽  
Close Relation ◽  
Life Safety ◽  
Element Analysis ◽  
Structure Strength ◽  
Chamber Model ◽  
Section Structure

Coal mine mobile refuge chamber, as the important equipment of underground refuge system, has a close relation to the life safety of the miners. At present, there are a lot of production refuge Chamber manufacturers, but they do not enjoy a unified standard in shape or size. This paper focuses on the establishment of the KJYF96/10 mobile refuge chamber model by Solidworks and adopts the structural finite element analysis by Simulation, drawing a conclusion of refuge chamber stress and displacement cloud chart. It is expected to offer an effective reference to improving the structure strength and reducing design costs.

Gaussian deconvolution: a useful method for a form-free modeling of scattering data from mono- and multilayered planar systems

2012 ◽  
Vol 45 (6) ◽  
pp. 1278-1286 ◽  
Author(s):  
Cristiano L. P. Oliveira ◽  
Barbara B. Gerbelli ◽  
Emerson R. T. Silva ◽  
Frédéric Nallet ◽  
Laurence Navailles ◽  
...  
Keyword(s):  
Form Factor ◽  
Electron Density ◽  
Cross Section ◽  
Density Profile ◽  
Structure Factor ◽  
Electron Density Profile ◽  
Scattering Data ◽  
Planar Systems ◽  
The Cross ◽  
Section Structure

A new method for analysis of scattering data from lamellar bilayer systems is presented. The method employs a form-free description of the cross-section structure of the bilayer and the fit is performed directly to the scattering data, introducing also a structure factor when required. The cross-section structure (electron density profile in the case of X-ray scattering) is described by a set of Gaussian functions and the technique is termed Gaussian deconvolution. The coefficients of the Gaussians are optimized using a constrained least-squares routine that induces smoothness of the electron density profile. The optimization is coupled with the point-of-inflection method for determining the optimal weight of the smoothness. With the new approach, it is possible to optimize simultaneously the form factor, structure factor and several other parameters in the model. The applicability of this method is demonstrated by using it in a study of a multilamellar system composed of lecithin bilayers, where the form factor and structure factor are obtained simultaneously, and the obtained results provided new insight into this very well known system.

Comparison of non-linear palette usage for gamma-ray tomography imaging

2013 ◽  
Vol 18 (2-3) ◽  
pp. 119-125
Author(s):  
Jan Budzisz ◽  
Volodymyr Mosorov ◽  
Sebastian Biedron
Keyword(s):  
Least Squares ◽  
Density Gradient ◽  
Cross Section ◽  
Linear Transformation ◽  
Gamma Ray ◽  
Correct Interpretation ◽  
Tomography Imaging ◽  
Non Invasive ◽  
Non Linear ◽  
Section Structure

Abstract Gamma-ray tomography is used for non-invasive studying of objects. To enable correct interpretation of such measurements, they need to be presented in analysis-friendly way. One method is to use ILST (Iterative Least Squares Technique) algorithm to visualize 1D detector data on a 2D grid, so that gammaray attenuation is visible with a resemblance to cross-section structure. However algorithm imperfections and thresholding do not always allow inferring shapes of the structure correctly. To remedy this, the analyses of the whole range of reconstructed values are to be used with a non-linear transformation function to visualize and emphasize density gradient.

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