Results 151 to 160 of about 280,466 (259)

The case for an epiphyte area index

open access: yesNew Phytologist, Volume 252, Issue 3, Page 973-980, November 2026.
Three distinct ecosystems where epiphytes contribute a substantial vegetative area in the canopy.
Collin Wischmeyer   +3 more
wiley   +1 more source

Minimizing eigenvalues of the fractional Laplacian

open access: yesCalculus of Variations and Partial Differential Equations
Abstract We study the minimizers of $$\lambda _k^s(A) + |A|$$ λ k s
openaire   +2 more sources

Unsupervised Patch‐Based Ecoregion Classification in Austria Using DEM‐Derived Features, Deep Learning, and Climate Data

open access: yesTransactions in GIS, Volume 30, Issue 7, November 2026.
ABSTRACT Digital elevation models (DEMs) are widely used to characterize terrain and support applications ranging from geomorphology to environmental management. While traditional analyses rely on handcrafted geomorphometric features, advances in machine learning enable richer, data‐driven representations of topographic surfaces.
Thomas Schneidergruber, Johannes Scholz
wiley   +1 more source

Bifurcation and multiplicity of solutions for the fractional Laplacian with critical exponential nonlinearity

open access: yesElectronic Journal of Differential Equations, 2016
We study the fractional elliptic equation $$\displaylines{ (-\Delta)^{1/2} u = \lambda u+|u|^{p-2}ue^{u^2} ,\quad\text{in } (-1,1),\cr u=0\quad\text{in } \mathbb{R}\setminus(-1,1), }$$ where $\lambda$ is a positive real parameter, p>2 and $(-\Delta)^
Pawan Kumar Mishra, Konijeti Sreenadh
doaj  

Existence Results for $\aleph$-Caputo Fractional Boundary Value Problems with $p$-Laplacian Operator

open access: yesJournal of New Theory
This study delves into the investigation of positive solutions for a specific class of $\aleph$-Caputo fractional boundary value problems with the inclusion of the p-Laplacian operator. In this research, we use the theory of the fixed point theory within
Özlem Batit Özen
doaj   +1 more source

Johnson–Schwartzman gap labeling for metric and discrete decorated graphs

open access: yesJournal of the London Mathematical Society, Volume 114, Issue 5, November 2026.
Abstract We study Schrödinger operators on metric and discrete decorated graphs. The values taken by the integrated density of states (IDS) on spectral gaps are called gap labels. A natural question is which gap labels can occur. We answer this for graphs arising from uniquely ergodic one‐dimensional dynamical systems by proving Johnson–Schwartzman gap‐
Ram Band, Gilad Sofer
wiley   +1 more source

POMs‐GibbsNet: A Deep Neural Network for the Prediction of Thermodynamic Parameters of Polyoxometalates

open access: yesJournal of Computational Chemistry, Volume 47, Issue 28, October 30, 2026.
Polyoxometalate thermochemistry is often limited by the high cost of DFT vibrational frequency calculations. POMs‐GibbsNet uses molecular structure, electronic, and QTAIM descriptors to predict thermal Gibbs free‐energy corrections without calculating the Hessian.
Jordi Buils, Carles Bo, David Balcells
wiley   +1 more source

Elimination of Spurious Modes in Reduced‐Order‐Modeling‐Based Topology Optimization of Geometrically Nonlinear Structures

open access: yesInternational Journal for Numerical Methods in Engineering, Volume 127, Issue 20, 30 October 2026.
ABSTRACT In geometrically nonlinear topology optimization, elements with low pseudo‐densities, subjected to compression from neighboring stiffer regions, can lead to complications, such as “inside‐out” elements in 2D structures or spurious local buckling in shells and plates.
Lidan Zhang, Fred van Keulen
wiley   +1 more source

A frame approach for equations involving the fractional Laplacian [PDF]

open access: yes
Exceptionally elegant formulae exist for the fractional Laplacian operator applied to weighted classical orthogonal polynomials. We utilize these results to construct a solver, based on frame properties, for equations involving the fractional Laplacian ...
Olver, Sheehan   +8 more
core   +1 more source

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