Results 91 to 100 of about 252,020 (241)

Stochastic Analysis of Pine Wilt Epidemic Model With Dynamically Consistent Approximation

Complexity
The present study investigated the dynamics of the nonlinear stochastic pine wilt epidemic model. An extension of the stochastic to deterministic model is presented.
Ali Raza, Mohammed Mahyoub Ali Al-Shamiri, Wafa F. Alfwzan, Muhammad Rafiq, Emad Fadhal, Nauman Ahmed   +5 more
doaj   +1 more source

Numerical modeling of susceptible latent breaking-out quarantine computer virus epidemic dynamics

Heliyon, 2018
This work is concerned with the numerical modeling of susceptible-latent-breakingout-quarantine-susceptible (SLBQRS) computer virus dynamics. The SLBQRS epidemic system is solved with three finite difference methods, one is proposed nonstandard finite ...
Umbreen Fatima, Mubasher Ali, Nauman Ahmed, M. Rafiq   +3 more
doaj   +1 more source

There Is More Than Meets the Eye: The Dual Role of Perception in Shaping Color Lexicons

Topics in Cognitive Science, EarlyView.
Abstract Color's ultimate physical reality is continuous, and yet human beings “cut” this continuum into a rather small number of categories reflected in their languages’ color lexicon. There are striking cross‐linguistic differences in the color lexicon, which are primarily attributed to differences in communicative needs, but also striking ...
Mathilde Josserand, Dan Dediu, François Pellegrino, Serge Caparos   +3 more
wiley   +1 more source

Weak, Strong and Mixed Extensions of Relations to Spaces of Ultrafilters

Mathematical Logic Quarterly, Volume 72, Issue 3, August 2026.
ABSTRACT The use of nonstandard methods to characterize properties of weak, strong and mixed extensions of congruences to ultrafilters has been the main topic of several recent papers, focused mostly on congruences and divisions. We show that similar methods can be used to extend these characterizations to arbitrary relations and their interplay.
Leonardo Raffaello Maximilian Gasparro, Lorenzo Luperi Baglini   +1 more
wiley   +1 more source

A Nonstandard Finite Difference Scheme for a Mathematical Model Presenting the Climate Change on the Oxygen-plankton System

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi
This paper presents a mathematical model describing climate change in the oxygen-plankton system. The model consists of a system of non-linear ordinary differential equations.
Zahraa Al Jammali, İlkem Turhan Çetinkaya   +1 more
semanticscholar   +1 more source

The Global Blue Bond Market: Governance Challenges and Sustainable Development Goals Disclosure

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 6, June 2026.
ABSTRACT Blue bonds are increasingly used to close conservation financing gaps, yet their effectiveness depends on governance that links capital to credible outcomes. This study provides the first market‐wide characterization of all 139 live blue bonds outstanding as of November 2025, representing over USD 30 billion in aggregate financing.
Teresa Corzo, Karin Martin‐Bujack, Laura Gismera, María Cuadrado Sobrini   +3 more
wiley   +1 more source

Nonstandard Finite Difference Schemes for Differential Equations

This paper gives an introduction to nonstandard finite difference methods useful for the construction of discrete models of differential equations when numerical solutions are required.

core   +1 more source

Stability and computational analysis of Influenza-A epidemic model through double time delay

Alexandria Engineering Journal
Delay factors demonstration has a significant role in controlling a strain of infectious disease instead of a pharmaceutical strategy. According to the World Health Organization (WHO), 3–5 million cases are reported annually and approximately 290,000 to ...
Ateq Alsaadi, Ali Raza, Muhammed Bilal Riaz, Umar Shafique   +3 more
doaj   +1 more source

A fully implicit non-standard finite difference scheme for one dimensional Burgers' equation

Journal of Applied Research on Industrial Engineering, 2020
In this paper we have studied a numerical approximation to the solution of the nonlinear Burgers' equation. The presented scheme is obtained by using the Non-Standard Finite Difference Method (NSFD).
Abdolrahman Yaghoobi , Hashem Saberi Najafi   +1 more
doaj   +1 more source

An Analysis of the Nonstandard Finite Difference and Galerkin Methods Applied to the Huxley Equation

Mathematics
The Huxley equation, which is a nonlinear partial differential equation, is used to describe the ionic mechanisms underlying the initiation and propagation of action potentials in the squid giant axon.
P. Chin, C. Moutsinga, K. R. Adem
semanticscholar   +1 more source