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Hamilton, Lagrange, le chaos. Cette Mécanique dans nos mouvements.
20 février 2024,
- CeREF Santé
,
- Autre
Autre
La compréhension des principes fondamentaux régissant les mouvements observés dans la Nature est un objectif fondamental de la science. Après les travaux pionniers de Newton (1643-1727), la Mécanique a considérablement évolué grâce aux reformulations de Lagrange (1736-1813) et de Hamilton (1805-1865). En invoquant un principe de moindre action, Lagrange a remplacé l'équation de Newton par la recherche ...
Occupational Risk Factors for Musculoskeletal Disorders among Workers in Dairy Diversification
11 janvier 2024,
- CeREF Santé
,
- Article scientifique
Article scientifique
Abstract
Background: In a changing European agricultural context, diversification of dairy farms is gaining attention. This study seeks to (1) assess musculoskeletal pain prevalence associated with tasks such as butter, yogurt, and cheese production; and (2) analyze associated risks. Methods: Observing 31, mostly female, workers, we utilized the ERGOROM questionnaire, a methodology adapted from ...
Diffusion in Phase Space as a Tool to Assess Variability of Vertical Centre-of-Mass Motion during Long-Range Walking
06 février 2023,
- CeREF Santé
- CeREF Technique
,
- Article scientifique
Article scientifique
When a Hamiltonian system undergoes a stochastic, time-dependent anharmonic perturbation,
the values of its adiabatic invariants as a function of time follow a distribution whose shape
obeys a Fokker–Planck equation. The effective dynamics of the body’s centre-of-mass during human
walking is expected to represent such a stochastically perturbed dynamical system. By studying, in
phase space, the ...
ZN-balls: Solitons from ZN-symmetric scalar field theory
28 novembre 2022,
- CeREF Technique
,
- Article scientifique
Article scientifique
We discuss the conditions under which static, finite-energy, configurations of a complex scalar field ϕ
with constant phase and spherically-symmetric norm exist in a potential of the form V(ϕ*ϕ, ϕ^N, ϕ^*N)
with N ∈ N and N ≥ 2, i.e., a potential with a ZN-symmetry. Such configurations are called ZN-balls. We
build explicit solutions in (3 + 1)-dimensions from a model mimicking effective field ...
Wearable Sensors Applied in Movement Analysis
30 novembre 2022,
- CeREF Technique
,
- Livre/Ouvrage ou monographie
Livre/Ouvrage ou monographie
Recent advances in electronics have led to sensors whose sizes and weights are such that they can be placed on living systems without impairing their natural motion and habits. They may be worn on the body as accessories or as part of the clothing and enable personalized mobile information processing. Wearable sensors open the way for a nonintrusive and continuous monitoring of body orientation, ...
Wearable Sensors Applied in Movement Analysis
27 octobre 2022,
- CeREF Technique
,
- Article scientifique
Article scientifique
Editorial de la Special Issue de Sensors, Wearable Sensors Applied in Movement Analysis.
Machine Learning Identifies Chronic Low Back Pain Patients from an Instrumented Trunk Bending and Return Test
03 juillet 2022,
- CeREF Technique
,
- Article scientifique
Article scientifique
Nowadays, the better assessment of low back pain (LBP) is an important challenge, as it is
the leading musculoskeletal condition worldwide in terms of years of disability. The objective of this
study was to evaluate the relevance of various machine learning (ML) algorithms and Sample Entropy
(SampEn), which assesses the complexity of motion variability in identifying the condition of low back
pain. ...
Compte rendu de : "Mee (Nicholas), Celestial Tapestry : The Warp and Weft of Art and Mathematics"
2022,
- HE Louvain en Hainaut
,
- Rapport
Rapport
Il s'agit du compte rendu du livre : "Mee (Nicholas), Celestial Tapestry : The Warp and Weft of Art and Mathematics. – Ox ford : Oxford University Press, 2020. – 325 p. – 1 vol. broché de 20 × 13 cm. – 16,99 £. – isbn 978-0-19-885195-0".
ZN-balls: Existence and application to Yang-Mills plasma
02 juin 2022,
- CeREF Technique
,
- Autre
Autre
Conférence donnée à "Exact solutions in classical field theory: Solitons, black holes and bosons stars – Workshop en l’honneur de Yves Brihaye", UMONS, 2-3 juin 2022.
https://web.umons.ac.be/pucg/event/workshop-en-lhonneur-de-yves-brihaye/
Many-Quark Interactions: Large-N Scaling and Contribution to Baryon Masses
31 mai 2022,
- CeREF Technique
,
- Article scientifique
Article scientifique
Starting from an effective Hamiltonian modeling, of a baryon made of N identical quarks in
the large-N approach of QCD, we obtain analytical formulas, allowing to estimate the contributions
of multiquark interactions to the baryon mass. The cases of vanishing (mass spectrum) and nonvanishing
(baryon melting) temperatures are treated.