Results 1 to 10 of about 39,384 (246)

Sensitivity of discrete symmetry metrics: Implications for metric choice. [PDF]

open access: yesPLoS ONE, 2022
Gait asymmetry is present in several pathological populations, including those with Parkinson's disease, Huntington's disease, and stroke survivors. Previous studies suggest that commonly used discrete symmetry metrics, which compare single bilateral ...
Allen Hill, Julie Nantel
doaj   +2 more sources

Self-assembled fibre optoelectronics with discrete translational symmetry [PDF]

open access: goldNature Communications, 2016
The thermal-draw technique offers fibre devices with a multiplicity of geometries, but these are constrainted to being translationally symmetric.
Michael Rein   +5 more
doaj   +2 more sources

Discrete symmetry tests using hyperon-antihyperon pairs [PDF]

open access: yesEPJ Web of Conferences, 2023
The BESIII experiment has accumulated millions of spin entangled hyperon–antihyperon pairs from the decays of the J/ψ and ψ(2S ) mesons produced in electron–positron collisions.
Kupsc Andrzej
doaj   +1 more source

Discrete theta angles, symmetries and anomalies

open access: yesSciPost Physics, 2021
Gauge theories in various dimensions often admit discrete theta angles, that arise from gauging a global symmetry with an additional symmetry protected topological (SPT) phase.
Po-Shen Hsin, Ho Tat Lam
doaj   +1 more source

Construction of Discrete Symmetries Using the Pauli Algebra Form of the Dirac Equation

open access: yesPhysical Sciences Forum, 2023
Two equations whose variables take values in the Pauli algebra of complex quaternions are shown to be equivalent to the standard Dirac equation and its Hermitian conjugate taken together.
Avraham Nofech
doaj   +1 more source

Crystalline gauge fields and quantized discrete geometric response for Abelian topological phases with lattice symmetry

open access: yesPhysical Review Research, 2021
Clean isotropic quantum Hall fluids in the continuum possess a host of symmetry-protected quantized invariants, such as the Hall conductivity, shift, and Hall viscosity.
Naren Manjunath, Maissam Barkeshli
doaj   +1 more source

Reduction in optimal control with broken symmetry for collision and obstacle avoidance of multi-agent system on Lie groups

open access: yesCommunications in Analysis and Mechanics, 2023
We study the reduction by symmetry for optimality conditions in optimal control problems of left-invariant affine multi-agent control systems, with partial symmetry breaking cost functions for continuous-time and discrete-time systems.
Efstratios Stratoglou   +2 more
doaj   +1 more source

Exact Solutions of Newell-Whitehead-Segel Equations Using Symmetry Transformations

open access: yesJournal of Function Spaces, 2021
In this article, Lie and discrete symmetry transformation groups of linear and nonlinear Newell-Whitehead-Segel (NWS) equations are obtained. By using these symmetry transformation groups, several group invariant solutions of considered NWS equations ...
Khudija Bibi, Khalil Ahmad
doaj   +1 more source

METHOD FOR ASSESSING THE SYMMETRY OF OBJECTS ON DIGITAL BINARY IMAGES BASED ON FOURIER DESCRIPTOR [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
In this paper we solve the problem of finding the symmetry axis of the object in a digital binary image. A new axial symmetry criterion is formulated for a connected discrete object.
L. Mestetskiy, A. Zhuravskaya
doaj   +1 more source

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