Results 71 to 80 of about 5,404 (245)

Is an ecosystem perspective sufficient to understand meta‐ecosystem processes? A critical reflection

open access: yesOikos, Volume 2026, Issue 1, January 2026.
Meta‐ecosystems are the largest and probably most complex structures investigated in ecology. Because of their complexity they are often separated into their respective sub‐systems and then studied in isolation. This is often done without analysing whether an understanding of the individual ecosystems can lead to a proper understanding of the meta ...
Jurg W. Spaak   +4 more
wiley   +1 more source

Solution of the Nonlinear Mixed Volterra-Fredholm Integral Equations by Hybrid of Block-Pulse Functions and Bernoulli Polynomials

open access: yesThe Scientific World Journal, 2014
A new numerical method for solving the nonlinear mixed Volterra-Fredholm integral equations is presented. This method is based upon hybrid functions approximation.
S. Mashayekhi, M. Razzaghi, O. Tripak
doaj   +1 more source

A Finite Difference Method for Smooth Solution of a System of Linear Volterra Integral Equations [PDF]

open access: yesمدل‌سازی پیشرفته ریاضی
In this paper, we propose a finite difference numerical method for the smooth solution of a system of linear Volterra integral equations. This method is a generalization of the finite difference method proposed in [11] and [12] for scalar linear Volterra
Mehdi Jalalvand   +2 more
doaj   +1 more source

A Survey of SIR‐Based Differential Epidemic Models for Control and Security Against Malware Propagation in Computer Networks

open access: yesSECURITY AND PRIVACY, Volume 9, Issue 1, January/February 2026.
ABSTRACT Unarguably, malware and their variants have metamorphosed into objects of attack and cyber warfare. These issues have directed research focus to modeling infrastructural settings and infection scenarios, analyzing propagation mechanisms, and conducting studies that highlight optimized remedial measures.
Chukwunonso Henry Nwokoye
wiley   +1 more source

Hyers–Ulam–Rassias Stability of Nonlinear Implicit Higher-Order Volterra Integrodifferential Equations from above on Unbounded Time Scales

open access: yesMathematics
In this paper, we present sufficient conditions for Hyers-Ulam-Rassias stability of nonlinear implicit higher-order Volterra-type integrodifferential equations from above on unbounded time scales.
Andrejs Reinfelds, Shraddha Christian
doaj   +1 more source

A Food Web Model of the Serengeti: Stability, Dynamics and Indirect Effects

open access: yesAfrican Journal of Ecology, Volume 64, Issue 1, January 2026.
ABSTRACT Effective conservation management of a complex ecosystem like the Serengeti can benefit from a systems‐wide approach to interactions between functional groups. This study presents a food web model of the Serengeti based on generalised Lotka–Volterra equations parameterised using data from the literature. The internal equilibrium point is shown
Dominic Clarke   +2 more
wiley   +1 more source

Solving Volterra-Fredholm integral equations by non-polynomial spline functions

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
 It depends on our information, non-polynomial spline functions have not been applied for solving Volterra- Fredholm integral equations of the second kind yet.
S.H. Salim, K.H.F. Jwamer, R.K. Saeed
doaj   +1 more source

Detection of Eco‐Evolutionary Dynamics in Communities Using Joint Species Distribution Models

open access: yesEcology Letters, Volume 29, Issue 1, January 2026.
Diverse communities in nature are structured by an array of complex processes, and it can be difficult to separate and measure their effects. To better understand species composition, it is crucial to consider trait evolution as an additional component driving species responses to the environment.
Jelena H. Pantel, Ruben J. Hermann
wiley   +1 more source

An innovative iterative approach to solving Volterra integral equations of second kind

open access: yesActa Polytechnica
Many scientists have shown great interest in exploring the realm of second-kind integral equations, offering many techniques for solving them, including exact, approximate, and numerical methods.
Mohammed Abdulshareef Hussein   +2 more
doaj   +1 more source

Numerical solution of nonlinear stochastic Itô–Volterra integral equations based on Haar wavelets

open access: yesAdvances in Difference Equations, 2019
In this paper, an efficient numerical method is presented for solving nonlinear stochastic Itô–Volterra integral equations based on Haar wavelets.
Jieheng Wu, Guo Jiang, Xiaoyan Sang
doaj   +1 more source

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