Results 41 to 50 of about 553,706 (265)

Conservation Laws of Three-Dimensional Perfect Plasticity Equations under von Mises Yield Criterion

open access: yesAbstract and Applied Analysis, 2013
For the first time the conservation laws for von Mises plasticity equations in three dimensions as well as for plane stress equations are given. In the plane case conservation laws are used to construct characteristics for the Cauchy problem.
S. I. Senashov, A. Yakhno
doaj   +1 more source

Geometric conservation laws for cells or vesicles with membrane nanotubes or singular points

open access: yesJournal of Nanobiotechnology, 2006
On the basis of the integral theorems about the mean curvature and Gauss curvature, geometric conservation laws for cells or vesicles are proved. These conservation laws may depict various special bionano structures discovered in experiments, such as the
Yin Jie, Yin Yajun
doaj   +1 more source

Invariant Finite-Difference Schemes for Plane One-Dimensional MHD Flows That Preserve Conservation Laws

open access: yesMathematics, 2022
Invariant finite-difference schemes are considered for one-dimensional magnetohydrodynamics (MHD) equations in mass Lagrangian coordinates for the cases of finite and infinite conductivity.
Vladimir Dorodnitsyn, Evgeniy Kaptsov
doaj   +1 more source

Conservation laws and normal forms of evolution equations

open access: yes, 2010
We study local conservation laws for evolution equations in two independent variables. In particular, we present normal forms for the equations admitting one or two low-order conservation laws.
Abellanas   +35 more
core   +1 more source

Transition From Lattice Oxygen to Radical‐Mediated Oxidation in Ammonium‐Intercalated Birnessite Catalysts for Selective Valorization of Biomass to Produce Formic Acid

open access: yesAdvanced Functional Materials, EarlyView.
The catalytic valorization of biomass represents an essential approach for achieving sustainable chemical production, with formic acid (FA) being recognized as a valuable platform chemical for hydrogen storage and environmentally friendly synthetic applications.
Yiqi Geng   +6 more
wiley   +1 more source

Analysis of the Symmetries and Conservation Laws of the Nonlinear Jaulent-Miodek Equation

open access: yesAbstract and Applied Analysis, 2014
Lie symmetry method is performed for the nonlinear Jaulent-Miodek equation. We will find the symmetry group and optimal systems of Lie subalgebras. The Lie invariants associated with the symmetry generators as well as the corresponding similarity reduced
Mehdi Nadjafikhah, Mostafa Hesamiarshad
doaj   +1 more source

Domain Wall Rebounds Driven by Competing Entropic and Spin‐Transfer Torques in Cylindrical Nanowires

open access: yesAdvanced Functional Materials, EarlyView.
Domain‐wall motion in cylindrical magnetic nanowires driven by nanosecond current pulses. Low current densities efficiently displace domain walls, whereas higher currents cause rebound at the wire ends. The effect results from the interplay between spin‐transfer torque and thermally induced processes, highlighting the role of thermal gradients in ...
Elias Saugar   +11 more
wiley   +1 more source

Conservation Laws of Two (2+1)-Dimensional Nonlinear Evolution Equations with Higher-Order Mixed Derivatives

open access: yesAbstract and Applied Analysis, 2013
In this paper, conservation laws for the (2+1)-dimensional ANNV equation and KP-BBM equation with higher-order mixed derivatives are studied. Due to the existence of higher-order mixed derivatives, Ibragimov’s “new conservation theorem” cannot be applied
Li-hua Zhang
doaj   +1 more source

Trivial conservation laws and solitary wave solution of the fifth order Lax equation

open access: yesPartial Differential Equations in Applied Mathematics, 2021
The current study deals with the conservation laws and exact solutions of the Lax equation, which is a special case of the fifth-order KdV equation. The trivial conservation laws obtained by using conservation theorem.
Arzu Akbulut, Filiz Taşcan, Elif Özel
doaj   +1 more source

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

open access: yesAdvanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

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