Results 51 to 60 of about 4,775 (117)

Scattering theory for difference equations with operator coefficients

Journal of the London Mathematical Society, Volume 113, Issue 3, March 2026.
Abstract We investigate a class of second‐order difference equations featuring operator‐valued coefficients with the aim of approaching problems of stationary scattering theory. We focus on various compact perturbations of the discrete Laplacian given in a Hilbert space of bi‐infinite square‐summable sequences with entries from a fixed Hilbert space ...
David Sher, Luis Silva, Boris Vertman, Monika Winklmeier   +3 more
wiley   +1 more source

Nariai-like black holes in light of scale-dependent gravity

European Physical Journal C: Particles and Fields, 2023
In this work, we investigate for the first time Nariai-like black hole solutions in four dimensional space time with spherical symmetry in the context of scale-dependent gravity.
Ángel Rincón, Pedro Bargueño
doaj   +1 more source

Outstanding Transmittance through Over-Wavelength-Thick Optical Plasmonic Microcavities [PDF]

EPJ Web of Conferences
This work models light transmission through metal-dielectric-metal microcavities supporting Coupled Surface Plasmons (CSP). An extended Fabry-Pérot formula reveals two plasmonic resonances that merge beyond a critical cavity thickness.
Doval Alejandro, Arosa Yago, Suárez-Fernández Lucía, de la Fuente Raúl   +3 more
doaj   +1 more source

The role of absorption mechanism on the optimization of processing commercial polymers under high repetition rate femtosecond laser irradiation

Journal of the European Optical Society-Rapid Publications
The response of three of the most used commercial polymers (poly(vinyl chloride) (PVC), poly(ethylene terephthalate) (PET) and polypropylene (PP)) under irradiation with high repetition rate (1 kHz–1 MHz) femtosecond (450 fs) multi-pulse (N = 10–1500 ...
Bernabeu Andrés P., Nájar Guillem, Ruiz Alberto, Bravo Juan C., Ramirez Manuel G., Gallego Sergi, Márquez Andrés, Puerto Daniel   +7 more
doaj   +1 more source

Ladder‐Type Benzene‐Perylene Dyes with Efficient Laser Properties in the Near‐IR by Detracting/Activating Low/High Frequency Vibronic Modes

Advanced Functional Materials, Volume 36, Issue 17, 26 February 2026.
The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández, Álex Farrando Pérez, Fernando Gordillo Gámez, Pedro G. Boj, José M. Villalvilla, José A. Quintana, Yanpei Wan, Daniel Aranda, José Manuel Marín‐Beloqui, Jishan Wu, Zebing Zeng, María A. Díaz‐García, Juan Casado   +12 more
wiley   +1 more source

Calculation of the Structure of a Shrub in the Mandelbrot Set

Discrete Dynamics in Nature and Society, 2011
We calculate the external arguments of the structure of any shrub in the Mandelbrot set. Before calculating, we revise, expand, and clarify some tools useful for this paper: harmonics, pseudoharmonics, the concept of structure, the structure of a shrub ...
G. Pastor, M. Romera, A. B. Orue, A. Martín, M-F. Danca, F. Montoya   +5 more
doaj   +1 more source

Biosynthesis of Silver Nanoparticles Using Black Pepper (Piper nigrum) Seed Extract and Evaluation of Their Cytotoxicity

Chemistry &Biodiversity, Volume 23, Issue 2, February 2026.
This study reports the green biosynthesis of piperine‐functionalized silver nanoparticles from Piper nigrum seed extract, followed by comprehensive physicochemical characterization and in vitro cytotoxic evaluation. The results confirm successful nanocomposite formation and demonstrate a marked enhancement of cytotoxic activity against gastric cancer ...
Nylton Ferreira Maciel, Gleice VasconcelosPereira do Lago, Glauce Vasconcelos da Silva Pereira, Ingryd Nayara de Farias Ramos, Aline Costa Bastos, Igor Alexandre Rocha Barreto, Nathiel Sarges Moraes, Marcos NazarenoLauné dos Santos, João Augusto Pereira da Rocha, Alencar Kolinski Machado, Waldomiro Gomes Paschoal Junior, Marcio Marcelo da Silva Pessoa, Maria de Nazaré Maciel Uesugi, André Salim Khayat, Jorddy Neves Cruz, José de ArimatéiaRodrigues do Rêgo, Maria Regina Sarkis Peixoto Joele, Davi do Socorro Barros Brasil   +17 more
wiley   +1 more source

Recomendaciones Clínicas Basadas en la Evidencia Científica para el Control de la Progresión de la Miopía

Optometría Clínica y Ciencias de la Visión
Relevancia: Una herramienta para la toma de decisiones en el gabinete de optometría. Resumen: En este trabajo se establecen recomendaciones clínicas basadas en la evidencia científica para la elección de tratamiento en el control de progresión de miopía.
Sofía Otín Mallada, Elena Rodríguez Gil, Laura Remón Martín   +2 more
doaj   +1 more source

Phonon Scattering by Local Off‐Centering in Diamond‐Like Cu2−XAgxIn2Se4 Chalcopyrites: High Carrier Mobility and Ultralow Thermal Conductivity

Small Structures, Volume 7, Issue 2, February 2026.
Local Ag substitution in diamond‐like Cu2‐xAgxIn2Se4 induces dynamic off‐centering distortions that strongly scatter phonons while preserving high carrier mobility. The resulting interplay between alloy disorder and band structure yields ultralow lattice thermal conductivity and promising thermoelectric performance in this sustainable, tellurium‐free ...
Irene Caro‐Campos, Victor Posligua, Jesús Prado‐Gonjal, Oscar J. Dura, Norbert M. Nemes, Javier Gainza, José L. Martínez, José A. Alonso, Antonio M. Márquez, José J. Plata, Federico Serrano‐Sanchez   +10 more
wiley   +1 more source

Cover Feature: Phonon Scattering by Local Off‐Centering in Diamond‐Like Cu2−XAgxIn2Se4 Chalcopyrites: High Carrier Mobility and Ultralow Thermal Conductivity (Small Struct. 2/2026)

Small Structures, Volume 7, Issue 2, February 2026.
Thermoelectric Materials The composition conveys the collaboration between the experimental and theoretical groups leading to the discovery of environmentally friendly new thermoelectric materials. Two hands reaching toward the crystal structure featured in the article symbolize this synergy.
Irene Caro‐Campos, Victor Posligua, Jesús Prado‐Gonjal, Oscar J. Dura, Norbert M. Nemes, Javier Gainza, José L. Martínez, José A. Alonso, Antonio M. Márquez, José J. Plata, Federico Serrano‐Sanchez   +10 more
wiley   +1 more source