Results 61 to 70 of about 36,284 (296)

Criticality for branching processes in random environment

, 2005
We study branching processes in an i.i.d. random environment, where the associated random walk is of the oscillating type. This class of processes generalizes the classical notion of criticality.
Afanasyev, V. I., Geiger, J., Kersting, G., Vatutin, V. A.   +3 more
core   +1 more source

Dynamic fitness landscapes: Expansions for small mutation rates [PDF]

, 2000
We study the evolution of asexual microorganisms with small mutation rate in fluctuating environments, and develop techniques that allow us to expand the formal solution of the evolution equations to first order in the mutation rate.
Demetrius, Drake, Eigen, Eigen, Eigen, Jones, Jones, Leuthäusser, Levin, Nilsson, Ronnewinkel, Swetina, Tarazona, Wilke, Yoshimura   +14 more
core   +3 more sources

Formation Control of Multi‐Agent System with Local Interaction and Artificial Potential Field

Advanced Robotics Research, EarlyView.
This article proposes a local interaction‐based formation control method for Multi‐Agent system, integrating consensus and leader‐follower strategies with a stress response mechanism—artificial potential field to reduce communication overhead and enable obstacle avoidance. Experimental results on triangular, square, and hexagonal formations confirm its
Luoyin Zhao, Zheping Yan, Yuqing Wang, Raye Chen‐Hua Yeow   +3 more
wiley   +1 more source

Chemically Driven Nano‐Elastic Heterogeneities Control Fragility in Volcanic Melts

Advanced Science, EarlyView.
The study elucidates how nanoscale structural heterogeneity governs the mechanical behavior of volcanic glasses across compositions from basalt to rhyolite. Using a physicochemical framework, correlation length (ξ) and microscopic free volume (Vc) are derived from vibrational and physical properties, revealing systematic trends with silica content that
Michele Cassetta, Daria Szewczyk, Gabriele Giuliani, Serena Dominijanni, Francesco Vetere, Gianluca Iezzi, Francesco Radica, Dmitry Bondar, Fabrizio Di Fiore, Alessio Pontesilli, Levent Karacasulu, Nicola Daldosso, Hideyuki Mizuno, Danilo Di Genova   +13 more
wiley   +1 more source

Homogenization of some evolution problems in domains with small holes

Electronic Journal of Differential Equations, 2016
This article concerns the asymptotic behavior of the wave and heat equations in periodically perforated domains with small holes and Dirichlet conditions on the boundary of the holes.
Bituin Cabarrubias, Patrizia Donato
doaj  

Oscillation Criteria for Solutions of Neutral Differential Equations of the Second-Order Emden-Fowler Type with Forcing Term

Ibn Al-Haitham Journal for Pure and Applied Sciences
 In this paper, the oscillation property and the asymptotic behavior of solutions of neutral second-order differential Equations of the Emden-Fowler type were studied under the influence of the coefficients of forces.
Jihan Saad, Hussain Ali Mohamad
doaj   +1 more source

Asymptotic Properties of Difference Equations for Isotropic Loop Quantum Cosmology

, 2005
In loop quantum cosmology, a difference equation for the wave function describes the evolution of a universe model. This is different from the differential equations that arise in Wheeler-DeWitt quantizations, and some aspects of general properties of ...
Adam Rej, Ashtekar A, Ashtekar A, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M Morales-Técotl H A, Cartin D, Immirzi G, Martin Bojowald, Rovelli C, Schroeppel R Beeler M Gosper R W Schroeppel R, Thiemann T, Velhinho J M   +17 more
core   +1 more source

Mathematical Prediction for Geometry‐Mediated Cell 3D In‐Growth on Bone Tissue Engineering Scaffolds

Advanced Science, EarlyView.
This study identifies a fundamental pore size dependent pattern of three dimensional bone marrow derived mesenchymal stem cell (BMSC) infiltration within porous scaffolds, where small pores promote horizontal cellular bridging and large pores facilitate vertical migration.
Xiang Gao, Zhijun Yu, Yu Yan, Jiamin Ding, Wangsiyuan Teng, Chenhe Zhou, Minjun Yao, Wenkan Zhang, Shenzhi Zhao, Fangqian Wang, Zhenxuan Shao, Jinfeng Zhou, Xiaoyong Wu, Chengcheng Yu, Liang Chen, Xiaoqiang Jin   +15 more
wiley   +1 more source

Asymptotic behavior for a quadratic nonlinear Schrodinger equation

Electronic Journal of Differential Equations, 2008
We study the initial-value problem for the quadratic nonlinear Schrodinger equation $$displaylines{ iu_{t}+frac{1}{2}u_{xx}=partial _{x}overline{u}^{2},quad xin mathbb{R},; t>1, cr u(1,x)=u_{1}(x),quad xin mathbb{R}. }$$ For small initial data $u_{
Pavel I. Naumkin, Nakao Hayashi
doaj  

Asymptotic Behavior of Large Deviation Probabilities for a Simple Oscillating Random Walk [PDF]

, 2022
E. L. Vetrova
openalex   +1 more source