نتایج جستجو برای: cross diffusion

تعداد نتایج: 647802  

2016
G. Campione L. Cavaleri

The improvement and the capacity assessment of existing buildings has become the main topic of the last years so that different studies can be found devoted to damaged structures or structures not having a capacity compatible with the safety levels of the actual codes. Reinforced concrete framed structure buildings represent a conspicuous rate of the existing constructions so many efforts are a...

Journal: :Advances in Complex Systems 2004
Elsayed Ahmed Ahmed Sadek Hegazi A. S. Elgazzar

The concept of cross diffusion is applied to some biological systems. The conditions for persistence and Turing instability in the presence of cross diffusion are derived. Many examples including: predatorprey, epidemics (with and without delay), hawk-dove-retaliate and prisoner’s dilemma games are given.

2014
V. Wiens L. Schlaffke T. Schmidt-Wilcke T. Schultz

Standard streamtubes for the visualization of diffusion MRI data are rendered either with a circular or with an elliptic cross section whose aspect ratio indicates the relative magnitudes of the medium and minor eigenvalues. Inspired by superquadric tensor glyphs, we propose to render streamtubes with a superquadric cross section, which develops sharp edges to more clearly convey the orientatio...

Journal: :Soft matter 2016
Maria A Vorontsova Peter G Vekilov Dominique Maes

We put forth an algorithm to track isolated micron-size solid and liquid particles that produce time-dependent asymmetric intensity patterns. This method quantifies the displacement of a particle in the image plane from the peak of a spatial cross-correlation function with a reference image. The peak sharpness results in subpixel resolution. We demonstrate the utility of the method for tracking...

2006
Abduljelil Iliyas M. Hassan Zahedi-Niaki Mladen Eić

With growing interest for the use of one-dimensional (1-D) zeolites in separation and reaction processes, the need to understand diffusion and transport properties of molecules within the channels of these materials is becoming more eminent. The mechanism used to describe passage of molecules inside narrow 1-D micropores is called single-file diffusion. Typically, this behavior is observed with...

Journal: :SIAM J. Math. Analysis 2010
Martin Burger Marco Di Francesco Jan-Frederik Pietschmann Bärbel Schlake

The aim of this paper is to investigate the mathematical properties of a continuum model for diffusion of multiple species incorporating size exclusion effects. The system for two species leads to nonlinear cross-diffusion terms with double degeneracy, which creates significant novel challenges in the analysis of the system. We prove global existence of weak solutions and well-posedness of stro...

Journal: :International journal of health policy and management 2014
Gordon C Shen

BACKGROUND Following the tenets of world polity and innovation diffusion theories, I focus on the coercive and mimetic forces that influence the diffusion of mental health policy across nations. International organizations' mandates influence government behavior. Dependency on external resources, namely foreign aid, also affects governments' formulation of national policy. And finally, mounting...

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