Results 71 to 80 of about 42,874 (261)

Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks

Conservation Biology, EarlyView.
Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang, Jorge García‐Girón, Ziyu Yang, Ziyu Liu, Shuxin Li, Wenhui You, Yihao Ge, Xin Gao, Yunzhi Yan   +8 more
wiley   +1 more source

Second-Order Nonlinear Impulsive Integro-Differential Equations of Mixed Type and Optimal Controls in Fractional Power Spaces

Abstract and Applied Analysis, 2010
A class of second-order nonlinear impulsive integro-differential equations of mixed type whose principal part is given by time-varying generating operators in fractional power spaces is considered. We introduce the reasonable PC-α-mild solution of second-
Y. Peng
doaj   +1 more source

An ordinary integro-differential equation with a degenerate kernel and an integral condition

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2016
We consider the questions of one value solvability of the nonlocal boundary value problem for a nonlinear ordinary integro-differential equation with a degenerate kernel and a reflective argument.
Tursun K Yuldashev
doaj   +1 more source

Some solution of the fractional iterative integro-differential equations [PDF]

, 2018
In this article, we focus to some classes of fractional iterative integro-differential equations. Firstly, we interested of the fractional iterative integro-differential equations including derivatives and establish the existence and uniqueness solutions
Damag, F. H. M., Kilicman, Adem
core  

Confronting policy myopia: Short‐term government policy and information seeking behaviors in rural Thailand

Review of Policy Research, EarlyView.
Abstract Short‐term policy (STP) has attracted considerable attention as a form of time‐related public policy and is typically used to solve urgent problems. The objective of this study, which considers STP as policy myopia from an information science perspective, is to discuss the challenges encountered during the STP policymaking process and their ...
Prasongchai Setthasuravich, Hironori Kato   +1 more
wiley   +1 more source

Oscillations of linear integro-differential equations

Open Mathematics, 2005
Abstract Sufficient conditions which guarantee that certain linear integro-differential equation cannot have a positive solution are established.
Rudolf Olach, Helena Šamajová
openaire   +4 more sources

Attractors for an Energy‐Damped Viscoelastic Plate Equation

Mathematical Methods in the Applied Sciences, Volume 48, Issue 14, Page 13864-13881, 30 September 2025.
ABSTRACT In this paper, we consider a class of non‐autonomous beam/plate equations with an integro‐differential damping given by a possibly degenerate memory and an energy damping given by a nonlocal ε$$ \varepsilon $$‐perturbed coefficient. For each ε>0$$ \varepsilon >0 $$, we show that the dynamical system generated by the weak solutions of the ...
V. Narciso, M. J. D. Nascimento, M. L. Pelicer, I. A. S. Picolli   +3 more
wiley   +1 more source

Distributed-order fractional wave equation on a finite domain. Stress relaxation in a rod

, 2010
We study waves in a rod of finite length with a viscoelastic constitutive equation of fractional distributed-order type for the special choice of weight functions.
Agraval, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Atanackovic, Bagley, D. Zorica, Drozdov, Hartley, Kilbas, Mainardi, Mainardi, Podlubny, Rogers, Rossikhin, Rossikhin, Rossikhin, Rossikhin, Rossikhin, S. Pilipovic, Samko, Schiessel, T.M. Atanackovic, Vladimirov   +29 more
core   +1 more source

Hopf bifurcation of integro-differential equations

Proceedings of The 6'th Colloquium on the Qualitative Theory of Differential Equations (August 10--14, 1999, Szeged, Hungary) edited by: Géza Makay and László Hatvani, 1999
Summary: A method reducing integro-differential equations (IDEs) to a system of ordinary differential equations (ODEs) is proposed. On this basis stability and bifurcation phenomena in critical cases are studied. An analogy of Hopf bifurcation for scalar first order IDEs is obtained. Conditions for the existence of periodic solutions are proposed.
Alexander Domoshnitsky, Yakov Goltser
openaire   +4 more sources

Monitoring population extinction risk with community science data

Journal of Applied Ecology, Volume 62, Issue 9, Page 2133-2147, September 2025.
Our modelling framework provides a robust, computationally efficient and easy‐to‐apply tool for monitoring local persistence probability that can support global conservation efforts. This will complement the monitoring of species population viability in places where standardized monitoring is still lacking, but community science observations are common.
Orlando Acevedo‐Charry, José M. Ponciano, Caroline L. Poli, Brian M. Jeffery, Robert J. Fletcher Jr., María Ángela Echeverry‐Galvis, Bette A. Loiselle, Scott K. Robinson, Miguel A. Acevedo   +8 more
wiley   +1 more source