Results 21 to 30 of about 6,656 (143)

From Current to Constituent Quarks: a Renormalization Group Improved Hamiltonian-based Description of Hadrons [PDF]

open access: yes, 1996
A model which combines the perturbative behavior of QCD with low energy phenomenology in a unified framework is developed. This is achieved by applying a similarity transformation to the QCD Hamiltonian which removes interactions between the ultraviolet ...
A. Le Yaouanc   +16 more
core   +2 more sources

Analytic and numeric analysis for deformation of non-prismatic beams resting on elastic foundations

open access: yesBeni-Suef University Journal of Basic and Applied Sciences, 2021
Background The buckling load as well as the natural frequency under axial load for non-prismatic beam is a changeling problem. Determination of buckling load, natural frequency, and elastic deflection is very important in civil applications.
Mohamed Elshabrawy   +2 more
doaj   +1 more source

Designing the response-spectra of microwave metasurfaces: theory and experiments. [PDF]

open access: yesNanophotonics
Abstract Metasurfaces composed by arrays of coupled plasmonic resonators have attracted tremendous attention due to their extraordinary abilities to manipulate electromagnetic (EM) waves. However, existing theories for such systems are either empirical with model parameters obtained by fitting with simulations, or can only be applied to high‐frequency ...
Xu Y   +6 more
europepmc   +2 more sources

Understanding the proton spin "puzzle" with a new "minimal" quark model [PDF]

open access: yes, 2001
We investigate the spin structure of the nucleon in an extended Jaffe-Lipkin quark model. In addition to the conventional $3q$ structure, different $(3q)(Q\bar{Q})$ admixtures in the nucleon wavefunction are also taken into account.
Ma, Bo-Qiang   +2 more
core   +4 more sources

Differential Quadrature and Differential Transformation Methods in Buckling Analysis of Nanobeams

open access: yesCurved and Layered Structures, 2019
In this paper, two computationally efficient techniques viz. Differential Quadrature Method (DQM) and Differential Transformation Method (DTM) have been used for buckling analysis of Euler-Bernoulli nanobeam incorporation with the nonlocal theory of ...
Jena Subrat Kumar, Chakraverty S.
doaj   +1 more source

Nonlinear static analysis of single layer annular/circular graphene sheets embedded in Winkler–Pasternak elastic matrix based on non-local theory of Eringen

open access: yesAin Shams Engineering Journal, 2016
Nonlinear bending analysis of orthotropic annular/circular graphene sheets has been studied based on the non-local elasticity theory. The first order shear deformation theory (FSDT) is applied in combination with the nonlinear Von-Karman strain field ...
Shahriar Dastjerdi   +2 more
doaj   +1 more source

Dynamic Analysis of Single-Layered Graphene Nano-Ribbons (SLGNRs) with Variable Cross-Section Resting on Elastic Foundation

open access: yesCurved and Layered Structures, 2019
This article deals with free vibration of the variable cross-section (non-uniform) single-layered graphene nano-ribbons (SLGNRs) resting on Winkler elastic foundation using the Differential Quadrature Method (DQM).
Jena Subrat Kumar, Chakraverty S.
doaj   +1 more source

Infinitely many shape invariant discrete quantum mechanical systems and new exceptional orthogonal polynomials related to the Wilson and Askey-Wilson polynomials [PDF]

open access: yes, 2009
Two sets of infinitely many exceptional orthogonal polynomials related to the Wilson and Askey-Wilson polynomials are presented. They are derived as the eigenfunctions of shape invariant and thus exactly solvable quantum mechanical Hamiltonians, which ...
Alberto Grünbaum   +35 more
core   +2 more sources

Data Quality Management Maturity Measurement of Government-Owned Property Transaction in BMKG

open access: yesCommIT Journal, 2018
Government-Owned Property (GOP) management, including the bookkeeping of GOP transaction, is part of GOP Officer responsibility to ensure the quality of transaction data.
Septian Bagus Wibisono   +2 more
doaj   +1 more source

Intrinsic decoherence and classical-quantum correspondence in two coupled delta-kicked rotors [PDF]

open access: yes, 2002
We show that classical-quantum correspondence of center of mass motion in two coupled delta-kicked rotors can be obtained from intrinsic decoherence of the system itself which occurs due to the entanglement of the center of mass motion to the internal ...
A. Perez   +29 more
core   +2 more sources

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