Results 31 to 40 of about 304,795 (244)

On regular but not completely regular spaces [PDF]

open access: yesTopology and its Applications, 2019
We present how to obtain non-comparable regular but not completely regular spaces. We analyze a generalization of Mysior's example, extracting its underlying purely set-theoretic framework. This enables us to build simple counterexamples, using the Niemytzki plane, the Songefrey plane or Lusin gaps.
Piotr Kalemba, Szymon Plewik
openaire   +3 more sources

Calculating sample entropy from isometric torque signals: methodological considerations and recommendations

open access: yesFrontiers in Physiology, 2023
We investigated the effect of different sampling frequencies, input parameters and observation times for sample entropy (SaEn) calculated on torque data recorded from a submaximal isometric contraction.
Peter C. Raffalt   +4 more
doaj   +1 more source

Regular Homomorphisms and Regular Maps

open access: yesEuropean Journal of Combinatorics, 2002
The authors study regular automorphisms of oriented maps. Their main concern is the problem of lifting and projecting map automorphisms. Regular homomorphisms of oriented maps essentially arise from a factorization by a subgroup of automorphisms. In this paper, this kind of map automorphisms is studied in detail.
Martin Škoviera   +2 more
openaire   +2 more sources

Sample Entropy as a Tool to Assess Lumbo-Pelvic Movements in a Clinical Test for Low-Back-Pain Patients

open access: yesEntropy, 2022
Low back pain (LBP) obviously reduces the quality of life but is also the world’s leading cause of years lived with disability. Alterations in motor response and changes in movement patterns are expected in LBP patients when compared to healthy people ...
Paul Thiry   +5 more
doaj   +1 more source

Hadamard regularization [PDF]

open access: yesJournal of Mathematical Physics, 2000
Motivated by the problem of the dynamics of point-particles in high post-Newtonian (e.g., 3PN) approximations of general relativity, we consider a certain class of functions which are smooth except at some isolated points around which they admit a power-like singular expansion.
Blanchet, Luc, Faye, Guillaume
openaire   +5 more sources

Validation of the Sleep Regularity Index in Older Adults and Associations with Cardiometabolic Risk

open access: yesScientific Reports, 2018
Sleep disturbances, including insufficient sleep duration and circadian misalignment, confer risk for cardiometabolic disease. Less is known about the association between the regularity of sleep/wake schedules and cardiometabolic risk.
Jessica R. Lunsford-Avery   +3 more
semanticscholar   +1 more source

High-speed manufacturing of highly regular femtosecond laser-induced periodic surface structures: physical origin of regularity

open access: yesScientific Reports, 2017
Highly regular laser-induced periodic surface structures (HR-LIPSS) have been fabricated on surfaces of Mo, steel alloy and Ti at a record processing speed on large areas and with a record regularity in the obtained sub-wavelength structures.
I. Gnilitskyi   +5 more
semanticscholar   +1 more source

Refined Regularity of the Blow-Up Set Linked to Refined Asymptotic Behavior for the Semilinear Heat Equation

open access: yesAdvanced Nonlinear Studies, 2017
We consider u⁢(x,t)${u(x,t)}$, a solution of ∂t⁡u=Δ⁢u+|u|p-1⁢u${\partial_{t}u=\Delta u+|u|^{p-1}u}$ which blows up at some time T>0${T>0}$, where u:ℝN×[0,T)→ℝ${u:\mathbb{R}^{N}\times[0,T)\to\mathbb{R}}$, p>1${p>1}$ and (N-2)⁢p0}$.
Ghoul Tej-Eddine   +2 more
doaj   +1 more source

Regularizing effect in some Mingione’s double phase problems with very singular data

open access: yesMathematics in Engineering, 2023
>In this paper we study the existence of solutions of the Dirichlet problem associated to the following nonlinear PDE $ \begin{equation*} { } -{{{\rm{\;div}}}}\big(a(x)\,\nabla u|\nabla u|^{p-2}\big) -{{{\rm{\;div}}}}\big( |u|^{(r-1)\lambda+1}\nabla u|
Lucio Boccardo, Giuseppa Rita Cirmi
doaj   +1 more source

Renormalising SPDEs in regularity structures [PDF]

open access: yes, 2017
The formalism recently introduced in arXiv:1610.08468 allows one to assign a regularity structure, as well as a corresponding "renormalisation group", to any subcritical system of semilinear stochastic PDEs. Under very mild additional assumptions, it was
Y. Bruned   +3 more
semanticscholar   +1 more source

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