Results 51 to 60 of about 65,920 (166)

Adatom interaction effects in surface diffusion

Condensed Matter Physics, 2013
Motivated by recent research of Nikitin et al. [J. Phys. D: Appl. Phys., 2009, 49, 055301], we examine the effects of interatomic interactions on adatom surface diffusion.
Yu.B. Gaididei, V.M. Loktev, A.G. Naumovets, A.G. Zagorodny   +3 more
doaj   +1 more source

Universality and self-similar behaviour of non-equilibrium systems with non-Fickian diffusion

Condensed Matter Physics, 2014
Analytical approaches describing non-Fickian diffusion in complex systems are presented. The corresponding methods are applied to the study of statistical properties of pyramidal islands formation with interacting adsorbate at epitaxial growth. Using the
D.O. Kharchenko, V.O. Kharchenko, S.V. Kokhan   +2 more
doaj   +1 more source

ACTIVE CONTOUR MODEL USING FRACTIONAL SYNC WAVE FUNCTION FOR MEDICAL IMAGE SEGMENTATION

Asia-Pacific Journal of Information Technology and Multimedia, 2016
Intensity inhomogeneity occurs when pixels in medical images overlap due to anomalies in medical imaging devices. These anomalies lead to difficult medical image segmentation.
Norshaliza Kamaruddin
doaj   +1 more source

Nonlinear response in diffusive systems

SciPost Physics
Nonintegrable systems thermalize, leading to the emergence of fluctuating hydrodynamics. Typically, this hydrodynamics is diffusive. We use the effective field theory (EFT) of diffusion to compute higher-point functions of conserved densities. We uncover a simple scaling behavior of correlators at late times, and, focusing on three and four-point ...
Delacretaz, Luca, Mishra, Ruchira
openaire   +3 more sources

Conditionally Integrable Nonlinear Diffusion with Diffusivity 1/u

Symmetry, 2019
An explicit mapping is given from the space of general complex meromorphic functions to a space of special time-dependent solutions of the 1 + 2-dimensional nonlinear diffusion equation with diffusivity depending on concentration as D = 1 / u. These solutions have constant-flux boundary conditions.
Broadbridge, Philip, Goard, Joanna M
openaire   +2 more sources

Circular Symmetric Laplacian Mixture Model in Wavelet Diffusion for Dental Image Denoising

Journal of Medical Signals and Sensors, 2012
In this paper, we try to find a particular combination of wavelet shrinkage and nonlinear diffusion for noise removal in dental images. We selected the wavelet diffusion and modified its automatic threshold selection by proposing new models for speckle ...
Raheleh Kafieh, Hossein Rabbani, Mehrdad Foroohandeh   +2 more
doaj  

Solutions of the attraction-repulsion-chemotaxis system with nonlinear diffusion

Mathematical Modelling and Analysis
In this study, we consider the well-posedness of the attraction-repulsion chemotaxis system. This paper explores the dynamics of species movement in reaction to two chemically opposing substances, incorporating nonlinear diffusion. Our primary objective
Yadhavan Karuppusamy, Shangerganesh Lingeshwaran   +1 more
doaj   +1 more source

On the anticrowding population dynamics taking into account a discrete set of offspring

Lietuvos Matematikos Rinkinys, 2015
A model of a population dynamics is solved numerically taking into account a discrete set of offsprings and the nonlinear (directed) diffusion. The model consists of a system of integro-partial differential equations subject to conditions of integral ...
Šarūnas Repšys, Vladas Skakauskas
doaj   +1 more source

Learning by Unsupervised Nonlinear Diffusion

, 2018
40 Pages, 17 ...
Maggioni, Mauro, Murphy, James M.
openaire   +3 more sources

Optimizing Deep CNN Architectures for Face Liveness Detection

Entropy, 2019
Face recognition is a popular and efficient form of biometric authentication used in many software applications. One drawback of this technique is that it is prone to face spoofing attacks, where an impostor can gain access to the system by presenting a ...
Ranjana Koshy, Ausif Mahmood
doaj   +1 more source