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82 resultados encontrados.

Tipos de recurso: Livro físico Livro eletrônico Artigo Periódico Tese Capítulo
Busca acadêmica
Theory of Dynamic Conductivity of Three-Barrier Resonance-Tullel Structure with Two-Photon Laser Transitions
Artigo
Artigo
Yu. O. Seti et al · Vasyl Stefanyk Carpathian National University · 2016 · ISSN 1729-4428
Within the approximation of effective mass and rectangular potential barriers for the electron and using theobtained solutions of complete Schrodinger equation, the theory of dynamic conductivity for three-barrierresonan...
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Open Access
Theory of dynamical superradiance in organic materials
Artigo
Artigo
Freter Lukas et al · Wiley · 2025 · ISSN 2192-8614
We develop the theory of dynamical superradiance – the collective exchange of energy between an ensemble of initially excited emitters and a single-mode cavity – for organic materials where electronic states are coup...
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Open Access
Frege’s Theory of Types
Artigo
Artigo
Bruno Bentzen · UNICAMP - Universidade Estadual de Campinas, Centro de Lógica, Epistemologia e História da Ciência · 2023 · ISSN 2317-630X
Abstract It is often claimed that the theory of function levels proposed by Frege in Grundgesetze der Arithmetik anticipates the hierarchy of types that underlies Church’s simple theory of types. This claim roughly sta...
LCC LCC:Logic; LCC:Philosophy (General)Idioma Inglés
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Open Access
Peristaltic flow of a hybrid nanofluid influenced by Hall current using the Maxwell thermal conductivity model and lubrication approximation
Artigo
Artigo
Ramzan Muhammad et al · De Gruyter · 2026 · ISSN 2391-5471
This study investigates the blood-based peristaltic flow of magnetite nanoparticles influenced by temperature-dependent electrical conductivity and the Hall current. The analysis of thermal transmission takes into accoun...
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Material complementario
An accurate design of graphene oxide ultrathin flat lens based on Rayleigh-Sommerfeld theory
Artigo
Artigo
Cao Guiyuan et al · Editorial Office of Opto-Electronic Journals Group, Institute of Optics and Electronics, CAS, China · 2018 · ISSN 2096-4579
Graphene oxide (GO) ultrathin flat lenses have provided a new and viable solution to achieve high resolution, high efficiency, ultra-light weight, integratable and flexible optical systems. Current GO lenses are designed...
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Material complementario
Effective-medium theory for elastic systems with correlated disorder
Artigo
Artigo
Jorge M. Escobar-Agudelo et al · American Physical Society · 2026 · ISSN 2643-1564
Effective-medium approaches, such as the coherent potential approximation, are commonly used to describe the rigidity transition of disordered elastic networks. While successful in capturing the universal critical behavi...
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Open Access
Electronic, structural and optical properties of zincblend and wurtizite cadmium selenide (CdSe) using density functional theory and hubbard correction
Artigo
Artigo
Teshome Gerbaba Edossa et al · Vasyl Stefanyk Carpathian National University · 2021 · ISSN 1729-4428
Zinc blend (zb) and wurtizite (wz) structure of cadmium selenide (CdSe) is determined using density-functional theory within local density approximation (LDA), generalized gradient approximation (GGA), Hubbard-correction...
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Open Access
Exploring Stability Landscapes and Complex Dynamics in a Discrete Holling–Tanner Predator–Prey Model via Bifurcation Theory and Machine Learning
Artigo
Artigo
Muhammad Rafaqat et al · Wiley · 2026 · ISSN 2314-4785
Discretization of continuous models can do more than approximate their dynamics; it can fundamentally transform their dynamical behavior, such as the complex dynamical behavior that translates the system to a chaotic sta...
LCC LCC:MathematicsIdioma Inglés
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Material complementario
Hyperbolic/elliptic‐ CAP formulation for FRCC based on microplane constitutive theory
Artigo
Artigo
Caggiano, Antonio et al · Wiley · 2024 · ISSN 1464-4177
The present work describes an elasto-plastic constitutive formulation aimed at simulating the failure behavior of Fiber Reinforced Cementitious Composites (FRCCs). This proposal, based on the Microplane Theory and Smeare...
Idioma Inglés
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Open Access
Multifunctional properties of the double perovskite Ca₂GaAsO₆ investigated using density functional theory
Artigo
Artigo
Aman Kumar et al · Springer · 2026 · ISSN 2948-1600
Abstract A first-principles study of the structural, electronic, magnetic, mechanical, and optical properties of the double perovskite Ca₂GaAsO₆ is presented using density functional theory with the Perdew-Burke-Ernz...
LCC LCC:Electrical engineering. Electronics. Nuclear engineering; LCC:MathematicsIdioma Inglés
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Open Access
Interaction of N-acetylneyraminic acid with surface of silica with fructose in aqueous solution
Artigo
Artigo
L.M. Ushakova et al · Vasyl Stefanyk Carpathian National University · 2021 · ISSN 1729-4428
Quantum chemical simulation of the adsorption of N acetylneuraminic acid (NANA) on the surface of silica with the participation of the fructose molecule by the method of density functional theory B3LYP, 6-31G (d, p) was ...
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Open Access
CEV Model with Stochastic Volatility
Artigo
Artigo
IVAN BURTNYAK et al · Vasyl Stefanyk Carpathian National University · 2019 · ISSN 2311-0155
This paper develops a systematic method for calculating approximate prices for a wide range of securities implying the tools of spectral analysis, singular and regular perturbation theory. Price options depend on stochas...
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Open Access
Dispersive surface-response formalism to address nonlocality in extreme plasmonic field confinement
Artigo
Artigo
Babaze Antton et al · Wiley · 2023 · ISSN 2192-8614
The surface-response formalism (SRF), where quantum surface-response corrections are incorporated into the classical electromagnetic theory via the Feibelman parameters, serves to address quantum effects in the optical r...
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Open Access
Dyakonov surface waves in dielectric crystals with negative anisotropy
Artigo
Artigo
Chermoshentsev Dmitry A. et al · Wiley · 2024 · ISSN 2192-8614
Since the initial discovery of Dyakonov surface waves at a flat infinite interface of two dielectrics, at least one of which is positively anisotropic, extensive research has been conducted towards their theoretical and ...
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Material complementario
Fluorescence quenching in plasmonic dimers due to electron tunneling
Artigo
Artigo
Baghramyan Henrikh M. et al · Wiley · 2022 · ISSN 2192-8614
Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the emitter excitation rate, and on the other...
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Open Access
Hydrogenated polycyclic aromatic hydrocarbons (H n PAHs) as catalysts for hydrogenation reactions in the interstellar medium: a quantum chemical model
Artigo
Artigo
Ferullo, Ricardo et al · Royal Society of Chemistry · 2019 · ISSN 1463-9076
The sticking of H atoms onto dust grains and large hydrocarbon molecules has received considerable attention because it is thought to govern the formation of H2 and other H-containing molecules in the interstellar medium...
Idioma Inglés
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Open Access
Influence of metal atom substitution on the electronic and optical properties of solid-state Cd0.75X0.25Te (X= Cu, Ag and Au) solutions
Artigo
Artigo
A.I. Kashuba · Vasyl Stefanyk Carpathian National University · 2023 · ISSN 1729-4428
The solid-state Cd0.75X0.25Te (X= Cu, Ag, and Au) solutions crystallize in the cubic structure and are studied in the framework of density functional theory. The theoretical first-principle calculations of the electronic...
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Open Access
On the Use of UTD-Based Models for RF Path Loss Prediction Due to Diffraction on a Forest-Covered Ridge
Artigo
Artigo
Felipe M. da Costa et al · Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo · 2021 · ISSN 2179-1074
Abstract Irregular terrains covered with forest vegetation represent a challenging scenario for radio planning. A case of particular interest is the one where a forest-covered high hill or mountain is interposed to the l...
LCC LCC:Electrical engineering. Electronics. Nuclear engineeringIdioma Inglés
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Open Access
Optimized basis sets for the calculation of indirect nuclear spin-spin coupling constants involving the atoms B, Al, Si, P, and Cl
Artigo
Artigo
Provasi, Patricio Federico et al · American Institute Of Physics · 2010 · ISSN 0021-9606
The aug-cc-pVTZ-J series of basis sets for indirect nuclear spin-spin coupling constants has been extended to the atoms B, Al, Si, P, and Cl. The basis sets were obtained according to the scheme previously described by P...
Idioma Inglés
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Open Access
Structural properties of mullite-type Pb(Al1–xMnx)BO4
Artigo
Artigo
Gesing, Th. M. et al · Oldenbourg Wissenschaftsverlag · 2013 · ISSN 2194-4946
We report on the structural characterization of the mullite-type PbAl1-xMnxBO4 series using neutron, synchrotron and in-house X-ray powder diffraction, Raman spectroscopy and density functional theory (DFT) calculations....
Idioma Inglés
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Open Access
Ab initio study of the cohesive properties, electronic structure and thermodynamic stability of the Ni-In and Ni-Sn intermetallics
Artigo
Artigo
Ramos, Susana Beatriz et al · Elsevier · 2013 · ISSN 0925-8388
A comprehensive study of the structural, cohesive and electronic properties of several stable, metastable and non-stable intermetallic phases (IPs) of the Ni–In and Ni–Sn systems have been performed by ab initio dens...
Idioma Inglés
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Material complementario
Analytical solution of the Schrödinger equation with 1/r^{3} and attractive 1/r^{2} potentials: Universal three-body parameter of mixed-dimensional Efimov states
Artigo
Artigo
Yuki Ohishi et al · American Physical Society · 2026 · ISSN 2643-1564
We study the Schrödinger equation with 1/r^{3} and attractive 1/r^{2} potentials. Using the quantum defect theory, we obtain analytical solutions for both repulsive and attractive 1/r^{3} interactions. The obtained dis...
LCC TENDOlBoeXNpY3M~Idioma Inglés
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Open Access
Análisis fonémico del rromanés bolochók de Cúcuta - Colombia Phonemic analysis of the Cúcuta's rromanés bolochók - Colombia
Artigo
Artigo
Oscar Antonio Caballero · Pontifícia Universidade Católica de São Paulo - PUC-SP · 2012 · ISSN 0102-4450
Este trabajo pretende una primera aproximación a la descripción fonológica del rromanés de la comunidad gitana rrom bolochók de la ciudad de Cúcuta (Colombia). Para lograr el objetivo propuesto inicialmente se pres...
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Material complementario
Assessing the Effect of Electronic Pseudopotentials and Relativistic Treatments on the Structural and Electrical Properties of GaN: A DFT Study
Artigo
Artigo
D. K. Das et al · Vasyl Stefanyk Carpathian National University · 2023 · ISSN 1729-4428
Applying the principle of Density functional theory, we can calculate various parameters like lattice constant, band gap, band plot, dielectric function plot, refractive index plot, conductivity plot, density of state pl...
LCC TENDOlBoeXNpY3M~Idioma Inglés
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Open Access
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