Results 131 to 140 of about 82,530 (235)

Financial Time Series Uncertainty: A Review of Probabilistic AI Applications

Journal of Economic Surveys, EarlyView.
ABSTRACT Probabilistic machine learning models offer a distinct advantage over traditional deterministic approaches by quantifying both epistemic uncertainty (stemming from limited data or model knowledge) and aleatoric uncertainty (due to inherent randomness in the data), along with full distributional forecasts.
Sivert Eggen, Tord Johan Espe, Kristoffer Grude, Morten Risstad, Rickard Sandberg   +4 more
wiley   +1 more source

Self-consistent Strong Screening Applied to Thermonuclear Reactions

The Astrophysical Journal
Self-consistent strong plasma screening around light nuclei is implemented in the Big Bang nucleosynthesis (BBN) epoch to determine the short-range screening potential, e ϕ ( r )/ T ≥ 1, relevant for thermonuclear reactions.
Christopher Grayson, Cheng Tao Yang, Martin Formanek, Johann Rafelski   +3 more
doaj   +1 more source

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, Volume 36, Issue 13, 12 February 2026.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

Generation of geodesic acoustic mode by drift wave turbulence in tokamaks with toroidal rotation

AIP Advances
Generation of geodesic acoustic mode by drift wave turbulence spectrum has been investigated in the toroidally rotating tokamak plasmas using the wave kinetic equation.
Jun Yu, Jun Chen
doaj   +1 more source

Nonreciprocal Terahertz Propagation via InSb Topological Photonic Crystals

Advanced Photonics Research, Volume 7, Issue 2, February 2026.
Addressing the challenge of high magnetic field requirements in conventional gyromagnetic materials, this article investigates indium antimonide (InSb) rod arrays operating at terahertz frequencies. By exploiting the synergy between the Voigt effect and the dispersive scaling properties, robust unidirectional propagation is achieved under a remarkably ...
Chun‐Yu Li, Yong‐Jun Xie, Pei‐Yu Wu, Sai Chen   +3 more
wiley   +1 more source

Structural Stability and General Relativity

Universe
We review recent developments in structural stability as applied to key topics in general relativity. For a nonlinear dynamical system arising from the Einstein equations by a symmetry reduction, bifurcation theory fully characterizes the set of all ...
Spiros Cotsakis
doaj   +1 more source

MIM‐Diode‐Like Rectification in Lateral 1T/1H/1T‐MoS2 Homojunctions via Interfacial Dipole Engineering

Advanced Electronic Materials, Volume 12, Issue 3, 4 February 2026.
The metallic 1T and semiconducting 1H phases of MoS2 enable phase‐engineered 1T/1H/1T homojunctions that exhibit MIM‐diode‐like rectification without dissimilar electrodes. Asymmetric 1T/1H interfaces induce interface dipoles and a built‐in potential drop across the 1H barrier, creating a trapezoidal tunnel barrier at zero bias and yielding diode‐like ...
Elias Eckmann, Ersoy Şaşıoğlu, Nicki F. Hinsche, Ingrid Mertig   +3 more
wiley   +1 more source

Dimer models and conformal structures

Communications on Pure and Applied Mathematics, Volume 79, Issue 2, Page 340-446, February 2026.
Abstract Dimer models have been the focus of intense research efforts over the last years. Our paper grew out of an effort to develop new methods to study minimizers or the asymptotic height functions of general dimer models and the geometry of their frozen boundaries.
Kari Astala, Erik Duse, István Prause, Xiao Zhong   +3 more
wiley   +1 more source

Normalized solutions for a nonlinear Dirac equation

Journal of Differential Equations
We prove the existence of a normalized, stationary solution $Ψ\colon \mathbb{R}^{3} \to \mathbb{C}^{4}$ with frequency $w > 0$ of the nonlinear Dirac equation. The result covers the case in which the nonlinearity is the gradient of a function of the form \begin{equation*} F(Ψ) = a|(Ψ, γ^{0}Ψ)|^{\fracα{2}} + b|(Ψ, γ^{1}γ^{2} γ^{3} Ψ)|^{\fracα{2 ...
Coti Zelati, Vittorio, Nolasco, Margherita   +1 more
openaire   +4 more sources

Cartesian MaxGIRF: Model‐based EPI reconstruction incorporating gradient nonlinearity and concomitant field effects

Magnetic Resonance in Medicine, Volume 95, Issue 2, Page 1044-1067, February 2026.
Abstract Purpose Lower field strength scanners with large bore size or complex geometries, and scanners with stronger gradient systems experience increased gradient nonlinearity and concomitant fields, each of which causes distortions in EPI. Current correction approaches based on image‐domain interpolation introduce undesirable spatial blurring.
Nam G. Lee, Sophia X. Cui, Krishna S. Nayak   +2 more
wiley   +1 more source