Resonance cone formation in a curved cylindrically anisotropic metamaterial film

2011 ◽  
Vol 36 (3) ◽  
pp. 343 ◽  
Author(s):  
Huikan Liu ◽  
Kevin J. Webb
Keyword(s):  
Cone Formation ◽  
Cylindrically Anisotropic ◽  
Anisotropic Metamaterial

Inhomogeneously filled, cylindrically anisotropic metamaterial optical fiber

2018 ◽  
Vol 12 (03) ◽  
pp. 1 ◽  
Author(s):  
Dheeraj Pratap ◽  
Abhinav Bhardwaj ◽  
S. Anantha Ramakrishna
Keyword(s):  
Optical Fiber ◽  
Cylindrically Anisotropic ◽  
Anisotropic Metamaterial

scholarly journals Cdk5 and GSK3β inhibit fast endophilin-mediated endocytosis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Antonio P. A. Ferreira ◽  
Alessandra Casamento ◽  
Sara Carrillo Roas ◽  
Els F. Halff ◽  
James Panambalana ◽  
...  
Keyword(s):  
Hippocampal Neurons ◽  
Growth Factor Receptor ◽  
Receptor Activation ◽  
Surface Proteins ◽  
Serum Starvation ◽  
Negative Regulators ◽  
Cell Surface Proteins ◽  
Local Regulation ◽  
Axon Elongation ◽  
Cone Formation

AbstractEndocytosis mediates the cellular uptake of micronutrients and cell surface proteins. Fast Endophilin-mediated endocytosis, FEME, is not constitutively active but triggered upon receptor activation. High levels of growth factors induce spontaneous FEME, which can be suppressed upon serum starvation. This suggested a role for protein kinases in this growth factor receptor-mediated regulation. Using chemical and genetic inhibition, we find that Cdk5 and GSK3β are negative regulators of FEME. They antagonize the binding of Endophilin to Dynamin-1 and to CRMP4, a Plexin A1 adaptor. This control is required for proper axon elongation, branching and growth cone formation in hippocampal neurons. The kinases also block the recruitment of Dynein onto FEME carriers by Bin1. As GSK3β binds to Endophilin, it imposes a local regulation of FEME. Thus, Cdk5 and GSK3β are key regulators of FEME, licensing cells for rapid uptake by the pathway only when their activity is low.

Cylindrically Anisotropic Tubes Containing a Line Dislocation

2006 ◽  
Author(s):  
Chung-Hao Wang
Keyword(s):  
State Space ◽  
Dislocation Line ◽  
Longitudinal Axis ◽  
The State ◽  
Fourier Series Expansion ◽  
General Solutions ◽  
Mixed Dislocation ◽  
Line Dislocation ◽  
Space Formulation ◽  
Cylindrically Anisotropic

An analytical solution of the problem of a cylindrically anisotropic tube which contains a line dislocation is presented in this study. The state space formulation in conjunction with the eigenstrain theory is proved to be a feasible and systematic methodology to analyze a tube with the existence of dislocations. The state space formulation which expediently groups the displacements and the cylindrical surface traction can construct a governing differential matrix equation. By using Fourier series expansion and the well developed theory of matrix algebra, the asymmetrical solutions are not only explicit but also compact in form. The dislocation considered in this study is a kind of mixed dislocation which is the combination of edge dislocations and a screw dislocation and the dislocation line is parallel to the longitudinal axis of the tube. The degeneracy of the eigen relation and the technique to determine the inverse of a singular matrix are thoroughly discussed, so that the general solutions can be applied to the case of isotropic tubes, which is one of the novel features of this research. The results of isotropic problems, which are belong to the general solutions, are compared with the well-established expressions in the literature. The satisfied correspondences of these comparisons indicate the validness of this study. A cylindrically orthotropic tube is also investigated as an example and the numerical results for the displacements and tangential stress on the outer surface are displayed. The effects on surface stresses due to the existence of a dislocation appear to have a characteristic of localized phenomenon.

Short-Length and High-Aperture-Efficiency Horn Antenna Using Low-Loss Bulk Anisotropic Metamaterial

2015 ◽  
Vol 14 ◽  
pp. 1642-1645 ◽  
Author(s):  
Yingran He ◽  
Ning Ding ◽  
Lingfei Zhang ◽  
Wenjing Zhang ◽  
Biao Du
Keyword(s):  
Horn Antenna ◽  
Short Length ◽  
Low Loss ◽  
Aperture Efficiency ◽  
Anisotropic Metamaterial

FDTD Simulation on the Interaction Between Gaussian Beam and Biaxial Anisotropic Metamaterial Slabs

2007 ◽  
Vol 29 (2) ◽  
pp. 167-178 ◽  
Author(s):  
Maoyan Wang ◽  
Jian Wu ◽  
Jun Xu ◽  
Debiao Ge ◽  
Hailong Li ◽  
...  
Keyword(s):  
Gaussian Beam ◽  
Fdtd Simulation ◽  
Anisotropic Metamaterial

Rigorous study of propagation in metallic circular waveguide filled with anisotropic metamaterial

2017 ◽  
Vol 9 (4) ◽  
pp. 805-813 ◽  
Author(s):  
Hedi Sakli ◽  
Mohamed Yahia ◽  
Wyssem Fathallah ◽  
Jun Wu Tao ◽  
Taoufik Aguili
Keyword(s):  
Computation Time ◽  
Circular Waveguide ◽  
Transverse Magnetic ◽  
Higher Order Modes ◽  
Anisotropic Metamaterials ◽  
Matching Technique ◽  
Theoretical Predictions ◽  
Rigorous Study ◽  
Circular Waveguides ◽  
Anisotropic Metamaterial

This paper presents an extension of the formulation of wave propagation in transverse electric (TE) and transverse magnetic (TM) modes in the case of metallic circular waveguides filled with anisotropic metamaterials. The determined higher-order modes have been analyzed and exploited to the design of filters. Among the particularities of anisotropic material, the backward waves can propagate below the cut-off frequency. The numerical results for TE and TM modes have been compared with theoretical predictions. Good agreements were obtained. We analyzed a periodic structure containing waveguides filled with anisotropic metamaterial using the mode-matching technique. By using modal analysis, our approach reduced considerably the computation time compared to HFSS.

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