When a predator avoids infected prey: a model-based theoretical study

2009 ◽  
Vol 27 (1) ◽  
pp. 75-94 ◽  
Author(s):  
M. Haque ◽  
D. Greenhalgh
Keyword(s):  
Theoretical Study ◽  
Model Based ◽  
Infected Prey

Study of Donor Centres in n-InSb due to the Temperature Annealing

2005 ◽  
Vol 480-481 ◽  
pp. 197-200
Author(s):  
Y. Sayad ◽  
A. Nouiri
Keyword(s):  
Experimental Data ◽  
Activation Energy ◽  
Annealing Time ◽  
Annealing Temperature ◽  
Theoretical Study ◽  
Donor Concentration ◽  
Model Based ◽  
Proposed Model ◽  
Kinetics Of ◽  
Best Fit

An increasing of donor centres has been detected in n-InSb when it was submitted to anneal/quench with various annealing temperature (450 °C - 850 °C) and various annealing time (5 - 100 hours). A theoretical study of the kinetics of the conduction conversion of n-InSb at temperature annealing above 250 °C has been made. The present analysis indicates that the donor concentration increases with increasing of annealing time. In order to study this variation and to give a model for donor centres generated, a proposed model based on the simple kinetic is used to fit the variation of donor concentration as a function of annealing time. However, from the best fit of experimental data using the proposed model, the activation energy is determined.

Sticker P System

2012 ◽  
Vol 3 (1) ◽  
pp. 28-43
Author(s):  
A. S. Prasanna Venkatesan ◽  
V. Masilamani ◽  
D. G. Thomas
Keyword(s):  
Dna Sequences ◽  
Theoretical Study ◽  
Regular Languages ◽  
P System ◽  
New Class ◽  
Model Based ◽  
Sticker System ◽  
Sticky Ends

A computability model based on DNA sequences called sticker systems was introduced by Kari et al. (1998). Sticker systems are language generating devices based on the sticker operation. In this work, a theoretical study about a new class of P system based on the sticker operation has been proposed. In this system, objects are double stranded sequences with sticky ends and evolution rules are sticking rules based on sticker operation. The authors compare the language generated by the proposed system with regular languages. The authors suggest another P system based on the bidirectional sticker system.

scholarly journals Optical Properties of Rough Grains: A Theoretical Study

1985 ◽  
Vol 85 ◽  
pp. 245-248
Author(s):  
J.M. Perrin ◽  
L. Lamy
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Recent Work ◽  
Mathematical Description ◽  
Theoretical Study ◽  
Geometrical Optics ◽  
High Energy ◽  
Model Based ◽  
Energy Approximation

AbstractRecent work on the light scattering by large rough particles has led us to propose a model based on the high-energy approximation, the laws of geometrical optics and a mathematical description of the properties of the particle roughness. The influence of the various parameters of the model including those characterizing the roughness on the total intensity and the polarization is presented.

Numerical Modeling of Unsteady Oil Film Motion Characteristics in Bearing Chambers

2015 ◽  
Vol 32 (3) ◽  
Author(s):  
Jingyu Zhao ◽  
Zhenxia Liu ◽  
Yaguo Lu ◽  
Jianping Hu
Keyword(s):  
Film Thickness ◽  
Theoretical Study ◽  
Rotation Speed ◽  
Three Dimensional ◽  
Lubricating Oil ◽  
Flow State ◽  
Oil Film ◽  
Model Based ◽  
Oil Flow ◽  
Motion Characteristics

AbstractTo obtain motion characteristics of the lubricating oil film on the aero-engine bearing chamber wall, a complete mathematical model based on theoretical study to solve three-dimensional unsteady oil film motion was established. On the basis of verifying the rationality of the computational model, the variations of the oil film thickness, velocity and temperature with the rotation speed and lubricating oil flow were analyzed and studied. The numerical results show that the following: In the stable oil film flow state, the oil film thickness shows a decreasing trend with increase in rotation speed and an increasing trend with increase in the lubricating oil flow. Particularly, comparison with the experimental work shows that the proposed numerical model based on theoretical study to solve unsteady oil film motion is a valuable technical means for the study of oil film movement mechanism and the design of actual bearing chamber.

Theoretical Study on a Multicenter Model Based on Different Metal Oxidation States for the Bis(imino)pyridine Iron Catalysts in Ethylene Polymerization

2009 ◽  
Vol 28 (20) ◽  
pp. 5889-5895 ◽  
Author(s):  
Víctor L. Cruz ◽  
Javier Ramos ◽  
Javier Martínez-Salazar ◽  
Soledad Gutiérrez-Oliva ◽  
Alejandro Toro-Labbé
Keyword(s):  
Ethylene Polymerization ◽  
Theoretical Study ◽  
Oxidation States ◽  
Iron Catalysts ◽  
Metal Oxidation ◽  
Model Based

scholarly journals SOME NATURAL VIABILITY SYSTEMS FOR A MULTIALLELIC LOCUS: A THEORETICAL STUDY

Genetics ◽  
1981 ◽  
Vol 97 (2) ◽  
pp. 457-473
Author(s):  
Samuel Karlin
Keyword(s):  
Genetic Polymorphism ◽  
Theoretical Study ◽  
Stable Equilibrium ◽  
Genotype Frequency ◽  
Activity Levels ◽  
Selection Models ◽  
Model Based ◽  
System A ◽  
Equilibrium Configurations ◽  
Globally Stable

ABSTRACT The maintenance of genetic polymorphism under various natural structured viability regimes vs. general unrestricted fitness assignments are compared. The selection models considered include a generalized dominance fitness system, a generalized viability model based on allelic activity values, viability matrices based on multilocus activity levels, viability matrices defined by partitioned "resource" or "substrate" variables, and circulant-type viability matrices. A number of examples that support these formulations are discussed. Detailed results on the nature of the genotype frequency equilibrium configurations for the specified viability models are presented. An increased likelihood for a globally stable equilibrium is predicted for the more structured viability models.

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