Results 91 to 100 of about 22,150,955 (299)

Harmonic mappings between surfaces : some local and global properties [PDF]

open access: yes
We develop some local and global properties of a harmonic map f :M -> N between surfaces. Our first main result is a local description of the possible singularities of such a harmonic map - we find there are four types: degeneracy, general fold ...
Wood, John C.
core  

Robust Estimation of Group-wise Cortical Correspondence with an Application to Macaque and Human Neuroimaging Studies

open access: yesFrontiers in Neuroscience, 2015
We present a novel group-wise registration method for cortical correspondence for local cortical thickness analysis in human and non-human primate neuroimaging studies.
Ilwoo eLyu   +9 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Elastic–Plastic Modeling and Experimental Characterization of Granular Jamming Actuators

open access: yesAdvanced Engineering Materials, EarlyView.
Granular jamming enables rapid switching between soft and rigid mechanical states. Here, a reduced‐order elastic‐perfectly‐plastic beam framework captures pressure‐dependent loading, unloading, residual deformation, and hysteresis in jammed beams, while matching three‐point bending experiments across materials and geometries. The framework links design
Saheli Patel   +2 more
wiley   +1 more source

Harmonic analysis for spinors on real hyperbolic spaces

open access: yes, 2001
International audienceWe develop the $L^2$ harmonic analysis for (Dirac) spinors on the real hyperbolic space $H^n(\mathbb{R})$ and give the analogue of the classical notions and results known for functions and differential forms: we investigate the ...
Pedon, Emmanuel, Camporesi, Roberto
core   +1 more source

An Analytical Study of the Diffraction of Light by a Circular Aperture Using Spherical Harmonics for n≤1

open access: yesInternational Journal of Optics, 2020
Based on the importance of spherical harmonics and their applicability in many physical problems, this research aimed to study the diffraction pattern of light by a circular aperture starting from the first Rayleigh–Sommerfeld diffraction equation and to
Mahmoud Ahmad   +2 more
doaj   +1 more source

Microscale Patterning of Ultrahigh‐Viscosity Metallic‐Polymer Composites via Embedded Droplet Writing

open access: yesAdvanced Functional Materials, EarlyView.
A hybrid additive manufacturing platform integrates direct droplet writing of metallic composite with VAT photopolymerization to fabricate architected soft magnetic composites. This approach enables microscale patterning of high‐viscosity materials for programmable actuators, adaptive fluidic devices, and switchable adhesives, offering tunable ...
Yeowon Yoon   +4 more
wiley   +1 more source

Harmonic Singular Integrals and Steerable Wavelets in $ L _{ 2 } $ $ (\mathbb{R} ^{ d } $ )

open access: yes
Here we present a method of constructing steerable wavelet frames in $ L _{ 2 } $ $ (\mathbb{R} ^{ d } $ ) that generalizes and unifies previous approaches, including Simoncelli's pyramid and Riesz wavelets.
Ward, J.P., Unser, M.
core   +1 more source

Harmonic diffeomorphisms of noncompact surfaces and Teichmüller spaces [PDF]

open access: yes, 2002
Let g : M -> N be a quasiconformal harmonic diffeomorphism between noncompact Riemann surfaces M and N. In this paper we study the relation between the map g and the complex structures given on M and N.
Markovic, V. (Vladimir)   +1 more
core   +1 more source

A signal-strength model for gravity-field spectrum components in a local space

open access: yesAnnals of Geophysics, 2013
In the Earth gravity-field model, potential coefficients are projections of the Earth gravitational potential on the corresponding spherical harmonics by degree and order.
Liu Hongwei, Wang Zhaokui, Zhang Yulin
doaj   +1 more source

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