HE Louvain en Hainaut: Recent submissions
Voici les éléments 361-377 de 377
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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 ... -
Two- and three-body calculations within the dominantly orbital state method
14 mai 2013, HE Louvain en HainautArticle scientifiqueThe dominantly orbital state method allows a semiclassical description of quantum systems. At the origin, it was developed for two-body relativistic systems. Here, the method is extended to treat two-body Hamiltonians and systems with three identical particles, in D≥2 dimensions, with arbitrary kinetic energy and potential. This method is very easy to implement and can be used in a large variety of ... -
Comments on Yang–Mills thermodynamics: The Hagedorn spectrum and the gluon gas pictures for a generic gauge algebra
20 octobre 2011, HE Louvain en HainautArticle scientifiqueWe discuss the dependence of pure Yang–Mills equation of state on the choice of gauge algebra. In the confined phase, we generalize to an arbitrary simple gauge algebra Meyer’s proposal of modeling the Yang–Mills matter by an ideal glueball gas in which the high-lying glueball spectrum is approximated by a Hagedorn spectrum of closed-bosonic-string type. Such a formalism is undefined above the ... -
Thermodynamics of the quark-gluon plasma within a T-matrix approach
24 juin 2015, HE Louvain en HainautArticle scientifiqueThe strongly coupled phase of the quark-gluon plasma (QGP) is studied here by resorting to a T -matrix formulation in which the medium is seen as a nonideal gas of quasiparticles (quarks, antiquarks, and gluons) interacting nonpertubatively. In the temperature range under study, (1–5)Tc, where Tc is the temperature of deconfinement, the interactions are expected to be strong enough to generate ... -
Ergonomic Risk Assessment of Developing Musculoskeletal Disorders in Workers with the Microsoft Kinect: TRACK TMS
19 octobre 2018, CeREF TechniqueArticle scientifiqueCompte rendu de la conférence JETSAN 2017 -
Alice et le Pendule : au pays des variables actions-angles
27 octobre 2020, CeREF TechniquePublication d'intérêt général/presseArticle de vulgarisaiton sur le pendule de Foucault -
Adiabatic invariants drive rhythmic human motion in variable gravity
01 décembre 2020, CeREF TechniqueArticle scientifiqueVoluntary human movements are stereotyped. When modeled in the framework of classical mechanics they are expected to minimize cost functions that may include energy, a natural candidate from a physiological point of view also. In time-changing environments, however, energy is no longer conserved—regardless of frictional energy dissipation—and it is therefore not the preferred candidate for any cost ... -
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 ... -
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. ... -
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 ... -
Opinion sur l’efficacité de la prise en charge en kinésithérapie des troubles neuro-musculo- squelettiques par téléréadaptation
18 avril 2020, HE Louvain en HainautArticle scientifiqueEn cette période de confinement liée au coronavirus 2 du syndrome respiratoire aigu sévère (SRAS-CoV-2), l’objectif de cet article est de formuler une opinion sur l'efficacité de la prise en charge kinésithérapique des troubles neuro-musculo-squelettiques (TNMS) par téléréadaptation (TR) ainsi que des guidelines pour les kinésithérapeutes. L’efficacité de la prise en charge en kinésithérapie par TR ... -
Timed Up and Go and Six-Minute Walking Tests with Wearable Inertial Sensor: One Step Further for the Prediction of the Risk of Fall in Elderly Nursing Home People
05 juin 2020, CeREF TechniqueArticle scientifiqueAssessing the risk of fall in elderly people is a difficult challenge for clinicians. Since falls represent one of the first causes of death in such people, numerous clinical tests have been created and validated over the past 30 years to ascertain the risk of falls. More recently, the developments of low-cost motion capture sensors have facilitated observations of gait differences between fallers ... -
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 ... -
Fractal analyses reveal independent complexity and predictability of gait
28 novembre 2017, HE Louvain en HainautLivre/Ouvrage ou monographieLocomotion is a natural task that has been assessed for decades and used as a proxy to highlight impairments of various origins. So far, most studies adopted classical linear analy- ses of spatio-temporal gait parameters. Here, we use more advanced, yet not less practical, non-linear techniques to analyse gait time series of healthy subjects. We aimed at finding more sensitive indexes related to ... -
Digital natives and dual task: Handling it but not immune against cognitive-locomotor interferences
19 mai 2020, HE Louvain en HainautCERISICArticle scientifiqueDigital natives developed in an electronic dual tasking world. This paper addresses two questions. Do digital natives respond differently under a cognitive load realized during a locomotor task in a dual-tasking paradigm and how does this address the concept of safety? We investigate the interplay between cognitive (talking and solving Raven’s matrices) and locomotor (walking on a treadmill) tasks ... -
Anyons in quantum mechanics with a minimal length
15 février 2017, HE Louvain en HainautArticle scientifiqueThe existence of anyons, i.e. quantum states with an arbitrary spin, is a generic feature of standard quantum mechanics in (2+1)-dimensional Minkowski spacetime. Here it is shown that relativistic anyons may exist also in quantum theories where a minimal length is present. The interplay between minimal length and arbitrary spin effects are discussed. -
DYSKIMOT: An Ultra-Low-Cost Inertial Sensor to Assess Head’s Rotational Kinematics in Adults during the Didren-Laser Test
04 février 2020, CERISICArticle scientifiqueVarious noninvasive measurement devices can be used to assess cervical motion. The size, complexity, and cost of gold-standard systems make them not suited to clinical practice, and actually difficult to use outside a dedicated laboratory. Nowadays, ultra-low-cost inertial measurement units are available, but without any packaging or a user-friendly interface. The so-called DYSKIMOT is a home-designed, ...