Results 51 to 60 of about 18,433,311 (402)
Viscoelastic modeling and factor Q for reflection data
Geofísica Internacional, 2012 Los modelos numéricos viscoelásticos, basados en el concepto de mecanismos de dispersión, toman en cuenta las variables de memoria y algunos parámetros de dispersión, a saber los tiempos de relajación de tensión. En la práctica de la geofísica, el factor
Vladimir Sabinin
doaj +1 more source
Extremely high Q -factor metamaterials due to anapole excitation [PDF]
, 2016 We demonstrate that ideal anapole metamaterials have infinite Q-factor. We have designed and fabricated a metamaterial consisting of planar metamolecules which exhibit anapole behavior in the sense that the electric dipole radiation is almost cancelled ...
A. Basharin +4 more
semanticscholar +1 more source
Tradeoff Between Antenna Efficiency and Q-Factor [PDF]
IEEE Transactions on Antennas and Propagation, 2017 The tradeoff between radiation efficiency and antenna bandwidth, expressed in terms of Q-factor for small antennas, is formulated as a multiobjective optimization problem in current distributions of predefined support.
M. Gustafsson, M. Capek, K. Schab
semanticscholar +1 more source
Computational Reverse-Engineering Analysis for Scattering Experiments for Form Factor and Structure Factor Determination ('P(q) and S(q) CREASE') [PDF]
arXiv, 2022 In this paper we present an open-source machine learning (ML) accelerated computational method to analyze small-angle scattering profiles [I(q) vs. q] from concentrated macromolecular solutions to simultaneously obtain the form factor P(q) (e.g., dimensions of a micelle) and structure factor S(q) (e.g., spatial arrangement of the micelles) without ...
arxiv
Interaction between coaxial dielectric disks enhances the Q factor [PDF]
Journal of Applied Physics, 2019 We study the behavior of resonant modes under variation of the distance between two coaxial dielectric disks and show an avoided crossing of resonances because of interaction between the disks.
K. Pichugin, A. Sadreev
semanticscholar +1 more source
Optimisation of metamaterials by Q factor
Electronics Letters, 2005 The Q factors of different elemental structures of metamaterials are investigated. Electromagnetic simulation and experiments have been used and the results from both studies exhibit good agreement. The origin and role of radiation losses is discussed and the effect on the resulting value of Q is highlighted. Some high-Q structures are identified which
Hao, T, Stevens, C, Edwards, D
openaire +3 more sources
Comment on ``Quantum Statistical Mechanics of an Ideal Gas with Fractional Exclusion Statistics in Arbitrary Dimension" [PDF]
Phys.Rev.Lett.81:2392,1998, 2007 It is mentioned that anyon thermodynamic potential $Q(\alpha, N)$ could not be factorized in terms characteristic of the ideal boson $\alpha =0$ and fermion $\alpha =1$ gases by the relation $Q(\alpha, N) = (1-\alpha) Q(0, N_b)+ \alpha Q(1, N_f)$ in which $N=N_f +N_b$, that claimed in Phys. Rev. Lett. 78, 3233 (1997).
arxiv +1 more source
Accuracy of the pion elastic form factor extracted from a local-duality sum rule
, 2011 We analyze the accuracy of the pion elastic form factor predicted by a local-duality (LD) version of dispersive sum rules. To probe the precision of this theoretical approach, we adopt potential models with interactions that involve both Coulomb and ...
Braguta V +10 more
core +1 more source
Pion electromagnetic form factor at spacelike momenta [PDF]
, 2013 A novel method is employed to compute the pion electromagnetic form factor, F_\pi(Q^2), on the entire domain of spacelike momentum transfer using the Dyson-Schwinger equation (DSE) framework in quantum chromodynamics (QCD).
Chang, L. +4 more
core +2 more sources
Control of Q-factor in nanobeam cavities on substrate [PDF]
2016 18th International Conference on Transparent Optical Networks (ICTON), 2016 In this paper, we demonstrate how to efficiently control the quality factor of silicon nitride nanobeam cavities, grown on a silica substrate and embedded in an upper cladding, by engineering the nanobeam cross-section and the shape of the periodic holes.
Panettieri, Danilo +2 more
openaire +4 more sources