Results 111 to 120 of about 112,931 (232)

Phonon‐Induced Markovian and Non‐Markovian Effects on Absorption Spectra of Moiré Excitons in Twisted Transition Metal Dichalcogenide Bilayers

open access: yesAdvanced Quantum Technologies, Volume 9, Issue 4, April 2026.
The twist angle dependence of phonon‐assisted optical absorption by moiré excitons in TMDC bilayers is studied based on a time convolutionless master equation. Small angles yield phonon‐induced absorption properties known from quantum dots or color centers reflecting non‐Markovian features, while larger angles produce absorption spectra similar to ...
Daniel Groll   +4 more
wiley   +1 more source

About the spectral problem arising from robotic manipulator mechanics

open access: yesМоделирование и анализ информационных систем, 2009
A spectral boundary problem of special type containing a spectral parameter in the boundary condition is completely solved in this paper. The characteristic equation for spectrum points determination is obtained, the energy innerproduct is derived, and ...
V. I. Voytitsky   +2 more
doaj  

Experimental Characterization and Modeling of High Hole Mobility GeSn Quantum Wells: The Role of Alloy Disorder Scattering

open access: yesSmall Science, Volume 6, Issue 4, April 2026.
This study reports record‐high hole mobility in undoped GeSn quantum wells, validated through magnetotransport measurements. By modeling the transport properties, the authors discover that alloy scattering in their material is significantly weaker than predicted for random alloys and previously studied materials.
Troy A. Hutchins‐Delgado   +18 more
wiley   +1 more source

Normal Modes in a Coupled Earth Model: A New Perspective on the Compliance Method

open access: yesJournal of Geophysical Research: Solid Earth, Volume 131, Issue 4, April 2026.
Abstract To understand the compliance parameters observed for atmospheric pressure waves, we develop a normal‐mode approach for a coupled Earth model that includes the atmosphere and the solid Earth. Extending the method of Press and Harkrider to a coupled Earth model, we introduce two new features.
Toshiro Tanimoto
wiley   +1 more source

An Epigenetic Clock for Accurate Age Prediction in Atlantic Cod Populations for Improved Fisheries Management

open access: yesMolecular Ecology Resources, Volume 26, Issue 3, April 2026.
ABSTRACT Fisheries management relies on accurate stock assessments, which in turn depend on precise age information. Recent molecular tools called ‘epigenetic clocks’ harness age‐related DNA methylation changes to build accurate and precise age‐prediction models.
Dafni Anastasiadi   +5 more
wiley   +1 more source

Abiotic drivers of co‐occurrence and diversity patterns of Calopterygidae species in Amazonian protected freshwaters

open access: yesEcological Entomology, Volume 51, Issue 2, Page 235-249, April 2026.
Species co‐occurrences rely on their ability to explore similar or distinct available resources, and possible niche overlap can prevent their presence and establishment in a given site Damselflies of the Calopterygidae family demonstrated negative co‐occurrences in streams inside and outside PAs, highlighting that their ecological similarity is ...
Joás Silva Brito   +13 more
wiley   +1 more source

Bifurcation Analysis of a Resource–Consumer System With Explicit Spatiotemporal Memory

open access: yesStudies in Applied Mathematics, Volume 156, Issue 4, April 2026.
ABSTRACT In ecological systems, animal movement is often influenced by memory and spatial cognition, especially in advanced species. This paper investigates the dynamics of a diffusive resource–consumer model incorporating explicit spatiotemporal distributed memory, where memory effects are modeled as distributed delays in both time and space.
Luhong Ye, Hao Wang
wiley   +1 more source

The Linearized Korteweg–de Vries Equation on the Line With Metric Graph Defects

open access: yesStudies in Applied Mathematics, Volume 156, Issue 4, April 2026.
ABSTRACT We study the small‐amplitude linearization of the Korteweg–de Vries equation on the line with a local defect scattering waves represented by a metric graph domain adjoined at one point. For a representative collection of examples, we derive explicit solution formulas expressed as contour integrals and obtain existence and unicity results for ...
D. A. Smith
wiley   +1 more source

Existence and Spectral Stability Analysis of Viscous‐Dispersive Shock Profiles for Isentropic Compressible Fluids of Korteweg Type

open access: yesStudies in Applied Mathematics, Volume 156, Issue 4, April 2026.
ABSTRACT The system describing the dynamics of a compressible isentropic fluid exhibiting viscosity and internal capillarity in one space dimension and in Lagrangian coordinates, is considered. It is assumed that the viscosity and the capillarity coefficients are nonlinear smooth, positive functions of the specific volume, making the system the most ...
Raffaele Folino   +2 more
wiley   +1 more source

Hecke operators on rational functions

open access: yes, 2003
We define Hecke operators U_m that sift out every m-th Taylor series coefficient of a rational function in one variable, defined over the reals. We prove several structure theorems concerning the eigenfunctions of these Hecke operators, including the ...
Gil, Juan B., Robins, Sinai
core   +1 more source

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