Results 81 to 90 of about 2,154 (279)
The Euler-Poincaré Equations in Geophysical Fluid Dynamics [PDF]
, 2002 Recent theoretical work has developed the Hamilton's-principle analog of Lie-Poisson Hamiltonian systems defined on semidirect products. The main theoretical results are twofold: 1.
Marsden, Jerrold E. +2 more
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Extended Hamilton's principle applied to geometrically exact Kirchhoff sliding rods
, 2022 International audienceThis article addresses the dynamic modelling of geometrically exact sliding Cosserat rods. Such systems need to consider nonmaterial time-varying domains to which the Lagrangian view point of solid mechanics is inappropriate. In the
Renda, Federico +3 more
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Dexime: A Selectively Enzyme‐Degradable Hydrogel for Protein Therapeutic Release
Advanced Materials, EarlyView.A dextrin‐oxime hydrogel (dexime) is produced using ketone or aldehyde modified dextrin and tetra‐oxyamine modified poly(ethylene glycol). The rheological and mechanical properties of dexime are tunable. Dexime is injectable, cytocompatible, hydrolytically stable, and selectively degradable by α‐amylase.
Quinton E. A. Sirianni +5 more
wiley +1 more source
Hamiltonian reduction of Einstein’s equations without isometries
EPJ Web of Conferences, 2018 I apply the Hamiltonian reduction procedure to 4-dimensional spacetimes without isometries and find privileged spacetime coordinates in which the physical Hamiltonian is expressed in terms of the conformal two metric and its conjugate momentum.
Yoon Jong Hyuk
doaj +1 more source
Advanced Materials, EarlyView.A giant insulator to metal transition and emergent superparamagnetism are revealed by nanoparticle exsolution in non‐stoichiometric titanate perovskite thin films. By combining transport, synchrotron spectroscopy, and first‐principles calculations, this work reveals how defect reconfiguration and lattice reconstruction fundamentally reshape electronic ...
Sungil Kim +11 more
wiley +1 more source
Analytical and Experimental Vibration of Sandwich Beams Having Various Boundary Conditions
Shock and Vibration, 2018 Generalized differential quadrature (GDQ) method is used to analyze the vibration of sandwich beams with different boundary conditions. The equations of motion of the sandwich beam are derived using higher-order sandwich panel theory (HSAPT).
Eshagh F. Joubaneh +2 more
doaj +1 more source
Advances in Magnesium‐Based Thermoelectrics: A Critical Review
Advanced Materials, EarlyView.Magnesium‐based thermoelectric materials have emerged as promising candidates for low‐to‐mid‐temperature energy conversion due to their abundance, low cost, and competitive performance. This review summarizes recent advances in Mg3X2, MgAgSb, and Mg2X systems, covering transport mechanisms, fabrication strategies, stability challenges, and device ...
Li‐Min Zhang +5 more
wiley +1 more source
Usual Approximations to the Equations of Atmospheric Motion: A Variational Perspective
, 2014 International audienceThe usual geophysical approximations are reframed within a variational framework. Starting from the Lagrangian of the fully compressible Euler equations expressed in a general curvilinear coordinates system, Hamilton's principle of ...
Tort, Marine, Dubos, Thomas
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Advanced Materials Interfaces, EarlyView.This study establishes a dual‐channel optical metrology framework integrating phase‐shifting imaging ellipsometry and deep‐UV reflectance imaging. This label‐free approach enables simultaneous, time‐resolved mapping of film thickness and nanoparticle (NP) concentration in dynamic nanofluid thin films.
Eita Shoji +3 more
wiley +1 more source
Учёные записки Казанского университета: Серия Физико-математические науки, 2017 A numerical theory of lunar rotation has been developed. The mathematical model of the rotation of the Moon has been considered within the “main problem”. The equations of the rotation have been constructed on the basis of the Hamiltonian approach.
A.A. Zagidullin +4 more
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