Segregation Simulation in a 2D Silo

SciVee ◽  
2011 ◽  
Author(s):  
Emre Yildiz
Keyword(s):  
Segregation Simulation

scholarly journals Partner choice and parameter estimates: modelling the effect of preferences

2019 ◽  
Author(s):  
Brendan Halpin
Keyword(s):  
Assortative Mating ◽  
Partner Choice ◽  
Parameter Estimates ◽  
Time Dimension ◽  
Loglinear Models ◽  
Agent Based ◽  
Social Segregation ◽  
Educational Assortative Mating ◽  
Segregation Simulation ◽  
The Relationship

Agent-based simulations of marriage processes are used to investigate whetherloglinear models of tables of spouse pairs properly capture evidence of the preferences behind assortative mating. Can we tell what sort of mechanisms bring about the patterns we see? Is there a female hypergamy preference and do loglinear models capture it? Four different ideal-typical simulations of spouse choice processes are presented: homophily, competition, social segregation, time segregation. All produce "realistic" patterns of educational assortative mating. Imposing a simulated female hypergamy preference yields more asymmetric outcomes, directly detected in loglinear models. But the relationship between the size of the hypergamy estimate and the strength of the hypergamy differs according to the pairing mechanism. Notably, for homophily the estimate is lower, and for time-segregation higher. Indeed, for zero simulated hypergamy, the homophily simulation shows negative, and the time-segregation simulation positive, hypergamy. This is shown to be due to the dynamic nature of the simulations: as individuals pair off the distribution of single individuals changes. For homophily perfectly symmetric choices at each iteration sum into a table of spouse pairs in which loglinear models detect hypogamy. Conclusions: these biases are small, and depend on very large simulation populations. They are less likely to be detectable in typical survey data. However, we demonstrate a clear mechanism by which loglinear models of tables of spouse pairs can be biased. This suggests that if longitudinal data is available, a time dimension should be included in the loglinear models. Otherwise, this is another argument for preferring tables of recent marriages.

scholarly journals A BASIC STUDY ON THE SEGREGATION SIMULATION BY USING MPS METHOD

2015 ◽  
Vol 69 (1) ◽  
pp. 711-717
Author(s):  
Yoshiki UEHARA ◽  
Yoshitomo YAMADA ◽  
Kohei SAKIHARA ◽  
Shinji URANO
Keyword(s):  
Basic Study ◽  
Mps Method ◽  
Segregation Simulation

Application of the Monte Carlo method to the problem of surface segregation simulation

JETP Letters ◽  
2001 ◽  
Vol 73 (8) ◽  
pp. 415-419 ◽  
Author(s):  
L. V. Poyurovskii ◽  
A. V. Ruban ◽  
I. A. Abrikosov ◽  
Yu. Kh. Vekilov ◽  
B. Johansson
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Surface Segregation ◽  
The Monte Carlo Method ◽  
Segregation Simulation

Segregation simulation of binary granular matter under horizontal pendulum vibrations

2016 ◽  
Vol 30 (30) ◽  
pp. 1650214 ◽  
Author(s):  
Xuedong Ma ◽  
Yanbing Zhang ◽  
Heli Ran ◽  
Qingying Zhang
Keyword(s):  
Granular Matter ◽  
Convex Geometry ◽  
Particle Segregation ◽  
Heavy Particles ◽  
Granular Segregation ◽  
Simulation Results ◽  
Light Particles ◽  
Segregation Simulation ◽  
Vibration Parameters ◽  
Horizontal Pendulum

Segregation of binary granular matter with different densities under horizontal pendulum vibrations was investigated through numerical simulation using a 3D discrete element method (DEM). The particle segregation mechanism was theoretically analyzed using gap filling, momentum and kinetic energy. The effect of vibrator geometry on granular segregation was determined using the Lacey mixing index. This study shows that dynamic changes in particle gaps under periodic horizontal pendulum vibrations create a premise for particle segregation. The momentum of heavy particles is higher than that of light particles, which causes heavy particles to sink and light particles to float. With the same horizontal vibration parameters, segregation efficiency and stability, which are affected by the vibrator with a cylindrical convex geometry, are superior to that of the original vibrator and the vibrator with a cross-bar structure. Moreover, vibrator geometry influences the segregation speed of granular matter. Simulation results of granular segregation by using the DEM are consistent with the final experimental results, thereby confirming the accuracy of the simulation results and the reliability of the analysis.

Science & society: Small groups foster interracial ties: Larger settings increase segregation, simulation finds

Science News ◽  
2013 ◽  
Vol 183 (11) ◽  
pp. 16-16
Author(s):  
Rachel Ehrenberg
Keyword(s):  
Small Groups ◽  
Science Society ◽  
Segregation Simulation
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