Produção Nacional
L.P. Vieira, V.O.M. Lara, D. F. Amaral,
... lei da gravitação universal de Newton e a lei de Coulomb.
Tópico(s): Science Education and Pedagogy
2014 - SOCIEDADE BRASILEIRA DE FÍSICA | Revista Brasileira de Ensino de Física
Produção Nacional
Revisado por pares
... Utilizou-se a modelagem matemática por meio da lei de Coulomb e também uma solução rápida e direta utilizando-se a lei de Gauss. A hipótese do trabalho é de que ...
Tópico(s): Education and Digital Technologies
2016 - | Conexão Ciência (Online)
Produção Nacional
Revisado por pares
Samuel de Almeida Torquato e Silva, Jorge Barbosa Soares, Suelly Helena de Araújo Barroso,
... rigidez deste modelo, utilizando o critério de Mohr-Coulomb e a Lei de Goodman, respectivamente. Os resultados experimentais corroboraram as premissas ...
Tópico(s): Asphalt Pavement Performance Evaluation
2018 - Associação Nacional de Pesquisa e Ensino em Transportes | Transportes
A Lei de Coulomb descreve a interação eletrostática entre partículas carregadas eletricamente. Esta lei foi deduzida experimentalmente por Charles Augustin de Coulomb e publicada em 17851. Para a sua dedução experimental, Coulomb utilizou uma balança de torção1.
Tópico(s): Environmental and biological studies
2015 - | Revista de Ciência Elementar
... engenheiro francês que ficou conhecido pela formulação da lei de Coulomb, que afirma que a força entre duas cargas elétricas é proporcional ao produto das cargas e inversamente proporcional ...
Tópico(s): Historical and Literary Studies
2015 - | Revista de Ciência Elementar
Produção Nacional
Paulo Cesar Facin, Giovana Silva,
... relativística, com campos elétrico e magnético dados pela lei de Coulomb e a lei de Biot-Savart, tradicionalmente abordados nos cursos de graduação. ...
Tópico(s): Science and Science Education
2023 - | Revista Educar Mais
Jorge Henrique de Oliveira Sales,
Tópico(s): Particle Accelerators and Free-Electron Lasers
1995 - | Aleph UCLA Undergraduate Research Journal for the Humanities and Social Sciences
Andréa Teixeira, Sonia Krapas,
Tópico(s): Indigenous Peoples' Rights and Law
2005 - Autonomous University of Barcelona | Enseñanza de las Ciencias Revista de investigación y experiencias didácticas
Chun‐Yu Lei, Jun Lei, Hong-Min Suo,
Abstract In this article, we study the existence of ground state solutions for the Schrödinger-Poisson-Slater type equation with the Coulomb-Sobolev critical growth: − Δ u + 1 4 π ∣ x ∣ ∗ ∣ u ∣ 2 u = ∣ u ∣ u + μ ∣ u ∣ p − 2 u , in R 3 , -\Delta u+\left(\frac{1}{4\pi | x| }\ast | u{| }^{2}\right)u=| u| u+\mu | u{| }^{p-2}u,\hspace{1.0em}{\rm{in}}\hspace{0.33em}{{\mathbb{R}}}^{3}, where μ > 0 \mu \gt 0 and 3 < p < 6 3\lt p\lt 6 . With the help of the Nehari-Pohozaev method, we obtain a ground-state solution for the above equation by employing compactness ...
Tópico(s): Advanced Mathematical Physics Problems
2023 - De Gruyter | Advances in Nonlinear Analysis
Daeha Joung, Lei Zhai, Saiful I. Khondaker,
We show that the low-temperature electron transport properties of chemically functionalized graphene can be explained as sequential tunneling of charges through a two-dimensional array of graphene quantum dots (GQDs). Below 15 K, a total suppression of current due to Coulomb blockade through a GQD array was observed. Temperature-dependent current-gate voltage characteristics show Coulomb oscillations with energy scales of 6.2--10 meV corresponding to GQD sizes of 5--8 nm, while resistance data exhibit ...
Tópico(s): Carbon and Quantum Dots Applications
2011 - American Physical Society | Physical Review B
Modified nonlinear Mohr–Coulomb (M–C) fracture criteria for isotropic materials and transversely isotropic unidirectional (UD) composites are proposed in the present study. The classic linear M–C fracture criterion for isotropic materials is briefly revised, and its deficiencies and limitations are identified. Based on the modification of a nonlinear variation of the M–C criterion for UD composites, the mathematical expressions of the proposed fracture criteria are formulated. The undetermined parameters ...
Tópico(s): Mechanical Behavior of Composites
2020 - Elsevier BV | Mechanics of Materials
Produção Nacional
Revisado por pares
Daniel Perdigão, Michelle Zampieri Ipólito,
... quatro: cargas elétricas; materiais e processos de eletrização; lei de Coulomb e distribuição das cargas; campo elétrico. Os livros ...
Tópico(s): Education Pedagogy and Practices
2021 - UNIVERSIDADE FEDERAL DO ESPÍRITO SANTO | Kiri-Kerê - Pesquisa em Ensino
Produção Nacional
... do DNA, é necessário associar o conhecimento da Lei de Coulomb na evolução das espécies, além da necessidade de ...
Tópico(s): Chemistry Education and Research
2015 - PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO | Educação Online
Produção Nacional
Emília de Mendonça Rosa Marques, Aguinaldo Robinson de Souza,
A lei de Coulomb, Equacao (1), descreve a interacao entre duas cargas eletricas pontuais 1q e 2q separadas por uma distância ...
Tópico(s): Power Line Communications and Noise
2015 - | Proceeding Series of the Brazilian Society of Computational and Applied Mathematics
... s da camada monogranular do leito, deduzida da lei de Coulomb. Analisam-se os mecanismos de erosão propostos por ...
Tópico(s): Soil Management and Crop Yield
1981 - | Geotecnia
Úlpio Nascimento, Elda Castro,
... superficial em taludes e, por outro lado, à lei de Coulomb generalizando-a à resistência ao corte de terrenos ...
Tópico(s): Dam Engineering and Safety
1977 - | Geotecnia
Produção Nacional
Willian Costa do Nascimento, Marcelo Costa Cardoso, Luciano Pessanha Moreira,
... de elementos finitos, o contato é definido pela lei de Coulomb para descrever o atrito entre as superfícies do ...
Tópico(s): Microstructure and Mechanical Properties of Steels
2013 - Brazilian Association of Metallurgy, Materials and Mining | Tecnologia em Metalurgia Materiais e Mineração
Produção Nacional
Regiane Lucas de Oliveira Garcêz, Neil de Medeiros, Luciano Pessanha Moreira,
... equiangulares. Neste caso, o atrito e descrito pela lei modificada de Coulomb. Em seguida, foram realizadas simulacoes numericas por elementos ...
Tópico(s): Material Properties and Processing
2019 - | Cadernos UniFOA
Wei Wang, Si Chen, Wen Lei, Xiao Feng, Yun‐Hui Liu, Carmine Autieri, Xing Ming,
Two-dimensional (2D) layered materials have attracted tremendous interest from the perspective of basic physics and technological applications in the last decade. Especially, the artificially assembled van der Waals (vdW) heterostructures and twisted 2D materials bring out fascinating properties, and render promising applications possible by engineering the stacking order. Here, based on first-principles calculations, we explored the interplay between stacking effect and electron-electron correlation ...
Tópico(s): Perovskite Materials and Applications
2022 - American Physical Society | Physical review. B./Physical review. B
Jun Zhao, Yuhang Li, Peng Fei Liu, Yu Lei Wang, Xu Du, Xue Lu Wang, Hui Zeng, Lirong Zheng, Hua Gui Yang,
Cadmiun sulfide (CdS) is considered as a promising semiconductor photocatalyst for its outstanding light absorbance and photoinduced charge separation, but it suffers from severe photocorrosion, mainly due to the sluggish kinetics of holes transfer. In this work, we introduce the strong local Coulomb attraction, which is demonstrated via the in situ K-edge X-ray absorption near edge (XANES) analysis, to accelerate the migration of holes for long-term photocatalytic activity. As a proof-of-concept ...
Tópico(s): Copper-based nanomaterials and applications
2017 - Elsevier BV | Applied Catalysis B Environment and Energy
Xiaomeng Liu, Lei Wang, Kin Chung Fong, Yuanda Gao, Patrick Maher, Kenji Watanabe, Takashi Taniguchi, James Hone, Cory R. Dean, Philip Kim,
The first experimental study of frictional drag effect between two monolayer sheets of graphene separated by a boron nitride spacer shows on strong magneto- and Hall-drag signals that depend on the Landau level filling of each graphene layer.
Tópico(s): Quantum and electron transport phenomena
2017 - American Physical Society | Physical Review Letters
Ming‐Yong Han, Lei Zhou, Chai Hoon Quek, Sam Fong Yau Li, Wei Huang,
A clear Coulomb staircase has been observed by using scanning tunneling microscopy in a new nanostructure with a surface-capped tunneling layer on the gold particle instead of a conventional tunneling thin film between the gold particle and substrate electrode. The occurrence of the Coulomb staircase was due to the pure and uniform surface-capped gold particles prepared by an efficient photochemical formation in a new kind of reducing nonaqueous system. As a comparison, the phenomenon cannot take ...
Tópico(s): Electrochemical Analysis and Applications
1998 - Elsevier BV | Chemical Physics Letters
Yirui Lu, Lei Yan, Shafqat Hussain, Mengtao Sun, Zhenglong Zhang, Hairong Zheng,
Tip enhanced Raman spectra of AB-stacked bilayer graphene (BLG) and twisted bilayer graphene (TwBLG) nanofragments have been studied by using density functional theory. Different from a normal Raman spectrum of BLG, a unique Raman band Gr+ is observed in its tip enhanced Raman spectrum and assigned as a split of the G band. We attribute this split to the nonuniformity distribution of the charge on carbon atoms. Compared with BLG, the Gr+ band intensity of TwBLG is dramatically enhanced at a small ...
Tópico(s): Carbon Nanotubes in Composites
2022 - American Institute of Physics | Applied Physics Letters
Ben Lei, Jianping Sheng, Fengyi Zhong, Chenyu Du, Ye He, Jieyuan Li, Fan Dong,
Heterojunction catalysts exhibit great potential in photocatalysis owing to their superior charge separation efficiency. However, precise regulation of interfacial electronic structures and their impact on photocatalytic reactions remains challenging. Here, we present an effective strategy involving accurate control of carrier dynamics through the rational design of interfacial covalent bonds. This strategy achieves high selectivity and productivity in toluene photo-oxidation, with a remarkable ...
Tópico(s): Covalent Organic Framework Applications
2023 - Elsevier BV | Journal of Catalysis
Bei-Lei Liu, Yuechao Wang, Yu Liu, Yuanji Xu, Xin Chen, Hongzhou Song, Yan Bi, Haifeng Liu, Haifeng Song,
As correlation strength has a key influence on the simulation of strongly correlated materials, many approaches have been proposed to obtain the parameter using first-principles calculations. However, a comparison of the different Coulomb strengths obtained using these approaches and an investigation of the mechanisms behind them are still needed. Taking lanthanide metals as an example, we research the factors that affect the effective Coulomb interaction strength, Ueff, by local screened Coulomb ...
Tópico(s): X-ray Diffraction in Crystallography
2023 - American Institute of Physics | The Journal of Chemical Physics
Zhizhou Yu, Jian Chen, Lei Zhang, Jian Wang,
We report an investigation of Coulomb blockade transport through an endohedral N@C60 weakly coupled with aluminum leads, employing the first-principles method combined with the Keldysh non-equilibrium Green's function derived from the equation of motion beyond the Hartree-Fock approximation. The differential conductance characteristics of the molecular device are calculated within the Coulomb blockade regime, which shows the Coulomb diamond as observed experimentally. When the gate voltage is less ...
Tópico(s): Quantum and electron transport phenomena
2013 - IOP Publishing | Journal of Physics Condensed Matter
Bei-Lei Liu, Yuechao Wang, Yu Liu, Haifeng Liu, Haifeng Song,
Strongly correlated systems containing d/f electrons present a challenge to conventional density functional theory such as the local density approximation or generalized gradient approximation. We developed a doubly screened Coulomb correction (DSCC) approach to perform on-site Coulomb interaction correction for strongly correlated materials. The on-site Coulomb interaction between localized d/f electrons is self-consistently determined from a model dielectric function that includes both the static ...
Tópico(s): Magnetic and transport properties of perovskites and related materials
2023 - American Chemical Society | The Journal of Physical Chemistry Letters
Daeha Joung, Lei Zhai, Saiful I. Khondaker,
We show that the low temperature electron transport properties of chemically functionalized graphene can be explained as sequential tunneling of charges through a two dimensional array of graphene quantum dots (GQD). Below 15 K, a total suppression of current due to Coulomb blockade through GQD array was observed. Temperature dependent current-gate voltage characteristics show Coulomb oscillations with energy scales of 6.2-10 meV corresponding to GQD sizes of 5-8 nm while resistance data exhibit ...
Tópico(s): Supercapacitor Materials and Fabrication
2011 - Cambridge University Press | Bulletin of the American Physical Society
Yong Ma, Xiaochuan Niu, Shu Guo, Lei Zhang, Jiaxuan Yan, Yuli Chen,
Tópico(s): Advanced materials and composites
2024 - Elsevier BV | Engineering Fracture Mechanics
Xiaomeng Liu, Lei Wang, Kin Chung Fong, Yuanda Gao, Patrick Maher, Kenji Watanabe, Takashi Taniguchi, James Hone, Cory R. Dean, Philip Kim,
Tópico(s): Diamond and Carbon-based Materials Research
2015 - Cambridge University Press | Bulletin of the American Physical Society