A Parallel Implementation of 3D Computed Tomography Algorithm

2015 ◽  
Vol 770 ◽  
pp. 491-494
Author(s):  
Andrey E. Kovtanyuk
Keyword(s):  
Computed Tomography ◽  
3D Reconstruction ◽  
Density Distribution ◽  
Cross Section ◽  
Cross Sections ◽  
Input Data ◽  
Parallel Implementation ◽  
Back Projection ◽  
Single Cross Section ◽  
Single Cross

A computed tomography problem as a 3D reconstruction of density distribution is considered. The input data are obtained as a result of irradiations. The solution of the computed tomography problem is presented as a set of cross-section images. The reconstruction in a single cross-section is performed by algorithm of convolution and back projection. The parallelization is fulfilled over a set of cross-sections by use of the MPI technology.

scholarly journals The Determinants of Immigrant Self-Employment in Australia

2000 ◽  
Vol 34 (1) ◽  
pp. 183-214 ◽  
Author(s):  
Anh T. Le
Keyword(s):  
Labor Market ◽  
Cross Section ◽  
Employment Growth ◽  
Cohort Effect ◽  
Employment Outcomes ◽  
Foreign Born ◽  
Self Employment ◽  
Single Cross Section ◽  
Market Experience ◽  
Single Cross

This article applies both single cross-section and dual cross-section approaches to modeling the propensity to be self-employed among the foreign born in the Australian labor market. The results from a single cross-section regression indicate that educational attainment, Australian labor market experience, the availability of capital, marital status and job related characteristics are important influences on self-employment outcomes. The propensity to be self-employed among immigrants is shown to be enhanced by the existence of enclave markets. Ethnic enclaves created via a common language provide more relevant prospects for self-employment than does the concentration of immigrants by birthplace. However, enclave markets do not have a significant impact on the self-employment outcomes of the Australian-born children of immigrants. The dual cross-section approach shows that the cross-section self-employment growth among immigrants is predominantly an adjustment effect rather than a cohort effect.

scholarly journals Inductance gradient and current density distribution for T-shaped convex and concave rail cross-sections

2018 ◽  
Vol 7 (1.8) ◽  
pp. 237
Author(s):  
M. N. Saravana Kumar ◽  
R. Murugan ◽  
Poorani Shivkumar
Keyword(s):  
Density Distribution ◽  
Cross Section ◽  
Cross Sections ◽  
Current Density ◽  
Current Density Distribution ◽  
Design Parameters ◽  
Element Analysis ◽  
Analysis Technique ◽  
Section Shape ◽  
Uniform Current

Rectangular rail was the most widely used cross section shape for the rail gun electromagnetic launching (EML) system. Based on sector assimilation, the rail gun key parameter especially current density (J) and inductance gradient (L’) greatly affected. J decides the efficiency of EML and L’ decides the force acting on the projectile of EML. So, it is mandatory to look upon the sector assimilation of rails. In this paper T shape convex and concave shape rail cross section is proposed and rail gun key design parameters are calculated by varying its dimensions using Ansoft Maxwell 2-D eddy current solver which uses finite element analysis technique to calculate these parameters. The performance of rail gun discussed using the obtained values and it has been observed and that the compared with other considered rail geometries, the T-shaped concave model shows more impact on inductance value which causes uniform current density distribution over the rails.

WHY PANEL DATA?

2005 ◽  
Vol 50 (02) ◽  
pp. 143-154 ◽  
Author(s):  
CHENG HSIAO
Keyword(s):  
Time Series ◽  
Panel Data ◽  
Cross Section ◽  
Human Behavior ◽  
Time Series Data ◽  
Data Modeling ◽  
Data Availability ◽  
Series Data ◽  
Single Cross Section ◽  
Single Cross

We explain the proliferation of panel data studies in terms of (i) data availability; (ii) the heightened capacity for modeling the complexity of human behavior than a single cross-section or time series data can possibly allow; and (iii) challenging methodology. Advantages and issues of panel data modeling are also discussed.

Optimum Design for Single Cross Section of Pillar Structures of Vehicles

2009 ◽  
Vol 419-420 ◽  
pp. 325-328
Author(s):  
Long Li ◽  
Wen Bin Hu ◽  
Ping Hu
Keyword(s):  
Cross Section ◽  
Design System ◽  
Concept Design ◽  
Vehicle Concept ◽  
Single Cross Section ◽  
Single Cross ◽  
Section Design ◽  
Proper Design ◽  
Design Plan ◽  
System 1

In this paper, a Section Tool Module is built to implement the cross section design of vehicle pillar structures which is integrated in VCD (Vehicle Concept Design) system [1]. The module may lead engineers to create section database and to get proper design plan effectively. The sectional properties such as area, moments of inertia are generated. In addition, an optimal design technique applied in this module is presented to perform the optimization for single cross section, in which sectional property is defined as objective function. An example of the optimization for a single cross section which is extracted from a passenger car is shown to demonstrate the Section Tool Module.

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