Results 141 to 150 of about 193,645 (277)

A complex network perspective on brain disease

Biological Reviews, Volume 101, Issue 1, Page 364-399, February 2026.
ABSTRACT If brain anatomy and dynamics have a complex network structure as it has become standard to posit, it is reasonable to assume that such a structure should play a key role not only in brain function but also in brain dysfunction. However, exactly how network structure is implicated in brain damage and whether at least some pathologies can be ...
David Papo, Javier M. Buldú
wiley   +1 more source

K-dimensional nonlocal boundary-value problems at resonance

Electronic Journal of Differential Equations, 2015
Summary: We show the existence of at least one solution to the system of nonlocal resonant boundary-value problem \[ x''= f(t,x),\quad x'(0)= 0,\quad x'(1)= \int^1_0 x'(s)\,dg(s), \] where \(f: [0,1]\times\mathbb{R}^k\to \mathbb{R}^k\), \(g: [0,1]\to \mathbb{R}^k\).
openaire   +2 more sources

Tourist visits to Madagascar's protected areas linked to deforestation decreases within but increases outside protected area boundaries

Conservation Science and Practice, Volume 8, Issue 2, February 2026.
Abstract Tourist visits to protected areas (PAs) are a widely promoted, yet largely untested, approach to achieve forest conservation and socioeconomic development. We assessed the impacts of annual tourist visits to 40 Madagascar PAs over 20 years on local deforestation in and around PA boundaries, using a two‐way fixed effects approach to control for
Camille M. M. DeSisto, Tristan Frappier‐Brinton, Elise Boos, Ranaivo A. Rasolofoson   +3 more
wiley   +1 more source

Models in Decision‐Making Under Risk and Uncertainty

Journal of Economic Surveys, Volume 40, Issue 1, Page 304-320, February 2026.
ABSTRACT This paper systematically compares dominant frameworks for modeling decision‐making under risk and uncertainty, evaluating their theoretical trade‐offs and practical relevance for economic research. We establish key criteria for model selection—including predictive accuracy, descriptive realism, computational tractability, and ecological ...
Martin Höppner
wiley   +1 more source

Can Complementary Currencies Foster Sustainability? A Systematic Review of the Impacts of Environmental Complementary Currencies

Journal of Economic Surveys, Volume 40, Issue 1, Page 549-581, February 2026.
ABSTRACT Growing financial needs for a sustainable transition have led to the development of green finance and citizen‐led monetary innovations. These initiatives recognized the necessity of developing new forms of money regarding the environmental crisis, referred to as environmental complementary currency (ECCs).
Léo Revelli
wiley   +1 more source

Gradient method in Sobolev spaces for nonlocal boundary-value problems

Electronic Journal of Differential Equations, 2000
An infinite-dimensional gradient method is proposed for the numerical solution of nonlocal quasilinear boundary-value problems. The iteration is executed for the boundary-value problem itself (i.e.
J. Karatson
doaj  

Well‐Posedness and Pattern Formation in a Two‐Species Reaction–Diffusion System with Nonlocal Perception

Studies in Applied Mathematics, Volume 156, Issue 2, February 2026.
ABSTRACT Nonlocal perceptual cues, such as visual, auditory, and olfactory signals, profoundly influence animal movement and the emergence of ecological patterns. To capture these effects, we introduce a two‐species reaction–diffusion system with mutual nonlocal perception on a two‐dimensional periodic domain.
Yaqi Chen, Ben Niu, Hao Wang
wiley   +1 more source

Boundary spike‐layer solutions of the multi‐dimensional singular Keller–Segel system: Existence, profiles and stability

Proceedings of the London Mathematical Society, Volume 132, Issue 2, February 2026.
Abstract This paper investigates boundary‐layer solutions of the singular Keller–Segel system (proposed in Keller and Segel [J. Theor. Biol. 30 (1971), 377–380]) in multi‐dimensional domains, which describes cells' chemotactic movement toward the concentration gradient of the nutrient they consume, subject to a zero‐flux boundary condition for the cell
Jose A. Carrillo, Jingyu Li, Zhi‐An Wang, Wen Yang   +3 more
wiley   +1 more source

Well-posedness of elliptic-parabolic differential problem with integral condition

Қарағанды университетінің хабаршысы. Математика сериясы
In this paper, we study a class of nonlocal boundary value problems for elliptic-parabolic equations subject to integral-type conditions. Such problems naturally emerge in various physical and engineering contexts, including diffusion processes in ...
O. Gercek
doaj   +1 more source

Cazenave‐Dickstein‐Weissler‐Type Extension of Fujita'S Problem on Heisenberg Groups

Mathematical Methods in the Applied Sciences, Volume 49, Issue 2, Page 499-511, 30 January 2026.
ABSTRACT This paper investigates the Fujita critical exponent for a heat equation with nonlinear memory posed on the Heisenberg groups. A sharp threshold is identified such that, for exponent values less than or equal to this critical value, no global solution exists, regardless of the choice of nonnegative initial data. Conversely, for exponent values
Mokhtar Kirane, Ahmad Z. Fino, Berikbol T. Torebek, Zineb Sabbagh   +3 more
wiley   +1 more source