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The Formulations of Classical Mechanics with Foucault’s Pendulum
01 octobre 2020, CERDECAMArticle scientifiqueSince the pioneering works of Newton (1643–1727), Mechanics has been constantly reinventing itself: reformulated in particular by Lagrange (1736–1813) then Hamilton (1805–1865), it now offers powerful conceptual and mathematical tools for the exploration of dynamical systems, essentially via the action-angle variables formulation and more generally through the theory of canonical transformations. ... -
Gravitating Bubbles of Gluon Plasma above Deconfinement Temperature
13 octobre 2020, CeREF TechniqueArticle scientifiqueThe equation of state of SU(3) Yang–Mills theory can be modelled by an effective Z3− symmetric potential depending on the temperature and on a complex scalar field ϕ . Allowing ϕ to be dynamical opens the way to the study of spatially localized classical configurations of the scalar field. We first show that spherically symmetric static Q-balls exist in the range (1−1.21)×Tc , Tc being the ... -
Hadrons, Charmé et Beauté
04 mai 2021, CeREF TechniqueAutreSéminaire donné le 4 mai 2021 pour le département de Physique (UMONS) -
Head Pitch Angular Velocity Discriminates (Sub-)Acute Neck Pain Patients and Controls Assessed with the DidRen Laser Test
06 avril 2022, CeREF TechniqueArticle scientifiqueUnderstanding neck pain is an important societal issue. Kinematic data from sensors may help to gain insight into the pathophysiological mechanisms associated with neck pain through a quantitative sensorimotor assessment of one patient. The objective of this study was to evaluate the potential usefulness of artificial intelligence with several machine learning (ML) algorithms in assessing neck ... -
High Specificity of Single Inertial Sensor-Supplemented Timed Up and Go Test for Assessing Fall Risk in Elderly Nursing Home Residents
17 février 2022, CeREF TechniqueArticle scientifiqueThe Timed Up and Go test (TUG) is commonly used to estimate the fall risk in the elderly. Several ways to improve the predictive accuracy of TUG (cameras, multiple sensors, other clinical tests) have already been proposed. Here, we added a single wearable inertial measurement unit (IMU) to capture the residents’ body center-of-mass kinematics in view of improving TUG’s predictive accuracy. The aim ... -
Higher-derivative harmonic oscillators: stability of classical dynamics and adiabatic invariants
06 janvier 2019, CERISICArticle scientifiquehe status of classical stability in higher-deriv- ative systems is still subject to discussions. In this note, we argue that, contrary to general belief, many higher-derivative systems are classically stable. The main tool to see this prop- erty are Nekhoroshev’s estimates relying on the action-angle formulation of classical mechanics. The latter formulation can be reached provided the Hamiltonian ... -
Le Boson de Brout-Englert-Higgs
25 mars 2014, CeREF TechniqueAutreConférence présentée à l'Université de Mons (UMONS dans le cadre du cycle Univers 2014-2015, par Fabien Buisseret (Haute Ecole Louvain en Hainaut et Service de Physique nucléaire et subnucléaire, UMONS) et Evelyne Daubie (Service de Physique nucléaire et subnucléaire, UMONS) « Presque cinquante ans après avoir été postulée, l’existence du boson de Brout-Englert-Higgs est maintenant avérée. Quel ... -
Low-Cost Sensors and Biological Signals
21 février 2021, CeREF TechniqueArticle scientifiqueEditorial of the Special issue Low-Cost sensors and Biological signals https://www.mdpi.com/journal/sensors/special_issues/LCSBS -
Low-Cost Sensors and Biological Signals
01 juin 2021, CeREF TechniqueLivre/Ouvrage ou monographieThis book is a printed edition of the Special Issue Low-Cost Sensors and Biological Signals that was published in Sensors -
Machine Learning Identifies Chronic Low Back Pain Patients from an Instrumented Trunk Bending and Return Test
03 juillet 2022, CeREF TechniqueArticle scientifiqueNowadays, 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. ... -
Many-Quark Interactions: Large-N Scaling and Contribution to Baryon Masses
31 mai 2022, CeREF TechniqueArticle scientifiqueStarting 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. -
Meson spectrum in SU(N) gauge theories with quarks in higher representations: A check of Casimir scaling hypothesis
01 juin 2020, CeREF TechniqueArticle scientifiqueGauge theories with gauge group and quarks belonging to arbitrary representations of SU(N) form a rich landscape of QCD-like theories, whose study can shed new light on the properties of confinement. Four cases are particularly worth of interest: quarks in the fundamental representation, quarks in the 2-indice (anti)symmetric representation and quarks in the adjoint representation. The last three ... -
Motor strategies and adiabatic invariants: The case of rhythmic motion in parabolic flights
05 août 2021, CeREF TechniqueArticle scientifiqueThe role of gravity in human motor control is at the same time obvious and difficult to isolate. It can be assessed by performing experiments in variable gravity. We propose that adiabatic invariant theory may be used to reveal nearly conserved quantities in human voluntary rhythmic motion, an individual being seen as a complex time-dependent dynamical system with bounded motion in phase space. ... -
NOMADe : présentation du projet et premières réalisations
11 décembre 2020, CeREF TechniqueArticle scientifiqueOù le projet INTERREG FWVL NOMADe (NeurOMuskuloskeletAl Disorders – e-learning ecosystem) est présenté, ainsi que deux réalisations illustrant la première année de son déroulement -
« NOMADe » Le projet INTERREG pour les Troubles Neuro-Musculo-Squelettiques (TNMS)
01 septembre 2020, CeREF TechniquePublication d'intérêt général/pressePrésentation de projet Interreg FWVl NOMADe -
Perceived Usefulness of Telerehabilitation of Musculoskeletal Disorders: A Belgium–France Pilot Study during Second Wave of COVID-19 Pandemic
22 novembre 2021, CeREF TechniqueArticle scientifiqueBackground: COVID-19 has affected the practice of physiotherapy, and telerehabilitation (TR) may be seen as an alternative model of care if it is accepted by patients and physiotherapists. This study investigates the perceived usefulness of TR and the intention to use it among physiotherapists and patients from Belgium and France concerned with musculoskeletal disorders (MSDs) during the pandemic ... -
Sample Entropy as a Tool to Assess Lumbo-Pelvic Movements in a Clinical Test for Low-Back-Pain Patients
22 mars 2022, CeREF TechniqueArticle scientifiqueLow 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. Such changes in dynamics may be assessed by the nonlinear analysis of kinematical time series recorded from one patient’s motion. Since sample ... -
Telerehabilitation of musculoskeletal diseases: Who wants it?
16 octobre 2021, CeREF TechniqueAutrePrésentation donnée au congrès NOMADe-SOFMER (Lille, 16/10/21) -
Utilisation de la réalité virtuelle dans un test clinique adaptatif de mobilité cervicale
25 février 2021, CeREF TechniqueActe de conférence ou de colloqueDifférents tests et outils cliniques existent dans le but d’évaluer les aptitudes fonctionnelles d’un patient, d’évaluer ses progrès ou même de l’entraîner. Cependant, ces outils cliniques présentent certains problèmes : Ils sont rarement adaptables aux capacités du patient car non modulaire, peu ludique pour de jeunes patients ou sur le long terme. L’objectif de la présente recherche est d’utiliser ... -
Wearable Sensors Applied in Movement Analysis
27 octobre 2022, CeREF TechniqueArticle scientifiqueEditorial de la Special Issue de Sensors, Wearable Sensors Applied in Movement Analysis.