Results 31 to 40 of about 736 (134)

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. The Nonstandard Finite Difference (NSFD) method is applied to discretize the non-linear system.
Zahraa Al Jammali, İlkem Turhan Çetinkaya   +1 more
openaire   +2 more sources

Integrating Merit and Equality to Address Gender Inequality at Work

Gender, Work &Organization, Volume 33, Issue 5, Page 1997-2006, September 2026.
ABSTRACT Although the extant literature provides a comprehensive account of workplace gender inequalities, the mechanisms that produce inequalities, and the underlying assumptions and principles of those mechanisms, remain opaque. The concept of “merit,” although morally persuasive and ubiquitous in organizational contexts, is a significant point of ...
Paula McDonald, Gill Kirton, Diane van den Broek   +2 more
wiley   +1 more source

Automatic Workout Mortgage and Housing Consumption Choice

International Review of Finance, Volume 26, Issue 3, September 2026.
ABSTRACT This paper further develops the Automatic Workout Mortgage (AWM) which embeds an insurance put option to reduce negative equity, systemic risk and promote economic recovery. We introduce a mathematical model showing that AWM raises household utility and increases housing demand.
Robert J. Shiller, Rafal M. Wojakowski, M. Shahid Ebrahim, Mark B. Shackleton   +3 more
wiley   +1 more source

Structure and Computation

Noûs, Volume 60, Issue 3, Page 593-605, September 2026.
ABSTRACT It is a truism of mathematics that differences between isomorphic number systems are irrelevant to arithmetic. This truism is deeply rooted in the modern axiomatic method and underlies most strands of arithmetical structuralism, the view that arithmetic is about some abstract number structure.
Balthasar Grabmayr
wiley   +1 more source

Mathematical and numerical studies of nonstandard difference equation models of differential equations. Final technical report, September 1995--September 1997 [PDF]

, 1997
The major thrust of this proposal was to continue our investigations of so-called non-standard finite-difference schemes as formulated by other authors. These schemes do not follow the standard rules used to model continuous differential equations by discrete difference equations.
openaire   +2 more sources

Aggregation and the Structure of Value

Noûs, Volume 60, Issue 3, Page 619-644, September 2026.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Scanner‐agnostic artificial intelligence approach for fast bone scintigraphy

Journal of Applied Clinical Medical Physics, Volume 27, Issue 8, August 2026.
Abstract Purpose Current bone scintigraphy protocols often demand full‐count, 10–15 min scans to preserve image quality, and existing deep‐learning (DL) denoisers typically need to be retrained or retuned for each camera manufacturer. We introduce a scanner‐agnostic adaptive‐diffusion U‐Net designed to reconstruct diagnostic‐grade images from half‐time
Vinicius de Oliveira Menezes, Cleiton Cavalcante Queiroz, Antônio Augusto Silva Oliveira, Aurílio José dos Santos Filho, Allisson Francisco de Morais, Adriano de Oliveira Vigário, Maria Eduarda Flamini, Felipe Alves Mourato, Tsang Ing Ren, Marcos Antônio Dórea Machado   +9 more
wiley   +1 more source

Optimal Control For A Crossover Cholera Mathematical Model Using Fractal (Variable-Fractional) Ψ-Caputo Derivative With Nonstandard Kernel

Scientific African
Abstract This paper introduces an optimal control strategy for cholera’s crossover mathematical model. The proposed model integrates Ψ-Caputo fractal variable-order derivatives, fractal fractional-order derivatives, and integer-order derivatives across three distinct time intervals, utilizing a simple non-standard ...
Seham M. Al-Mekhlafi, Ebenezer Bonyah
openaire   +1 more source

Robust Tests of Forecast Accuracy for Factor‐Augmented Regressions With an Application to the Novel EA‐MD‐QD Dataset

Journal of Applied Econometrics, Volume 41, Issue 5, Page 549-566, August 2026.
ABSTRACT We present four novel tests of equal predictive accuracy and encompassing á Pitarakis (2023, 2025) for factor‐augmented regressions. Factors are estimated using cross‐section averages (CAs) of grouped series and our theoretical findings are empirically relevant: asymptotic normality, robustness to an overspecification of the number of factors,
Alessandro Morico, Ovidijus Stauskas
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