Results 71 to 80 of about 1,542,295 (301)

On Caffarelli-Kohn-Nirenberg inequalities for block-radial functions

open access: yes, 2016
The paper provides weighted Sobolev inequalities of the Caffarelli-Kohn-Nirenberg type for functions with multi-radial symmetry. Similarly to the previously studied radial case, the range of parameters in CKN inequalities can be extended, sometimes to ...
Skrzypczak, Leszek, Tintarev, Cyril
core   +1 more source

Disentangling effects of flower symmetry and orientation on pollination

open access: yesJournal of Pollination Ecology
Some Saxifraga species possess an intraindividual variation of flower symmetry and orientation: flowers with horizontally oriented corolla planes are radially symmetrical, whereas flowers with vertically oriented corolla planes are bilaterally ...
Manuel Wiegel, Klaus Lunau
doaj   +1 more source

Topologically protected states in a spider web lattice

open access: yesPhysical Review Research, 2020
Topological phases and edge-state topological protection are explicitly related by the bulk-edge correspondence which assumes the existence a real space boundary in one-dimensional (1D), 2D, or 3D systems.
J. P. Pino   +4 more
doaj   +1 more source

Critical power of collapsing vortices

open access: yes, 2008
We calculate the critical power for collapse of linearly-polarized phase vortices, and show that this expression is more accurate than previous results.
Gadi Fibich, Nir Gavish, T. Mizumachi
core   +1 more source

Clinical Practice Guideline for Evaluation and Management of Peripheral Nervous System Manifestations in Sjögren's Disease

open access: yesArthritis Care &Research, EarlyView.
Objective Sjögren's disease is an autoimmune disorder that can impact multiple organ systems, including the peripheral nervous system (PNS). PNS manifestations, which can exist concurrently, include mononeuropathies, polyneuropathies, and autonomic nervous system neuropathies.
Anahita Deboo   +88 more
wiley   +1 more source

Radial power-law position-dependent mass; Cylindrical coordinates, separability, and spectral signatures

open access: yes, 2011
We discuss the separability of the position-dependent mass Hamiltonian in cylindrical coordinates in the framework of a radial power-law position-dependent mass. We consider two particular radial mass settings; a harmonic oscillator type, and a Coulombic
Mustafa, Omar
core   +1 more source

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg   +5 more
wiley   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar   +6 more
wiley   +1 more source

Symmetry of Ancient Solution for Fractional Parabolic Equation Involving Logarithmic Laplacian

open access: yesFractal and Fractional, 2023
In this research, we focus on the symmetry of an ancient solution for a fractional parabolic equation involving logarithmic Laplacian in an entire space. In the process of studying the property of a fractional parabolic equation, we obtained some maximum
Wei Zhang, Yong He, Zerong Yang
doaj   +1 more source

Exciton-polariton emission from organic semiconductor optical waveguides

open access: yes, 2011
We photo-excite slab polymer waveguides doped with J-aggregating dye molecules and measure the leaky emission from strongly coupled waveguide exciton polariton modes at room temperature.
B. E. A. Saleh   +2 more
core   +1 more source

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