Parcourir HE Louvain en Hainaut thématique/sous thématique "Physique, chimie, mathématiques & sciences de la terre"
Voici les éléments 21-33 de 33
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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 -
L’histoire des sciences et des techniques, la philosophie des sciences, dans «La recherche», «Pour la science», «Revue d’histoire des sciences», «Revue des questions scientifiques» : 1937-1990. Bibliographie
Livre/Ouvrage ou monographieBibliographie des articles d'histoire des sciences, d'histoire des techniques et de philosophie des sciences parus dans ces quatre revues de vulgarisation -
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. -
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. ... -
Q-ball formation at the deconfinement temperature in large-Nc QCD
23 janvier 2013, HE Louvain en HainautArticle scientifiqueThe deconfinement phase transition in large-Nc QCD is studied within the framework of an effective Polyakov-loop model, where the potential has a U(1) symmetry originating in the large-Nc limit of a ZNc-symmetric model. At the critical temperature, the shape of the effective potential allows the existence of Q-balls as position-dependent fluctuations of the Polyakov loop. Q-balls with spherical ... -
Q-balls and charged Q-balls in a two-scalar field theory with generalized Henon-Heiles potential
30 avril 2024, CeREF TechniqueArticle scientifiqueWe construct Q-ball solutions from a model consisting of one massive scalar field ξ and one massive complex scalar field ϕ interacting via the cubic couplings g1ξϕ ϕ þ g2ξ3, typical of Henon-Heiles-like potentials. Although being formally simple, these couplings allow for Q-balls. In one spatial dimension, analytical solutions exist, either with vanishing or nonvanishing ϕ. In three spatial ... -
Quand soixante étudiants manipulent pour appréhender l'univers des grandeurs et ses aspects didactiques...
juin 2019, HE Louvain en HainautActe de conférence ou de colloqueNous présentons un dispositif avec artefacts vécu par les étudiants en début de formation d’instituteur primaire (Belgique). L’ambition principale de ce dispositif est de parcourir l’ensemble des aspects de l’apprentissage d’une grandeur pour les enfants de 3 à 12 ans, en mettant l’accent sur l’importance de la pratique des gestes de mesurage et l’intérêt de l’élaboration de représentations mentales, ... -
Relevance of glueball bound states in the Yang-Mills plasma within a many-body T-matrix approach
26 juillet 2012, HE Louvain en HainautArticle scientifiqueThe strongly coupled phase of Yang-Mills plasma with gauge group SU(3) is studied in a Tmatrix approach. The existence of lowest-lying glueballs, interpreted as bound states of two transverse gluons (quasi-particles in a many-body setup), is analyzed in a non-perturbative scattering formalism with the input of lattice-QCD static potentials. The relevance of the singlet and the (colored) octet ... -
The SUSY Yang Mills plasma in a T-matrix approach
12 août 2015, HE Louvain en HainautArticle scientifiqueIn this paper, the thermodynamic properties of N = 1 supersymmetric Yang–Mills theory with an arbitrary gauge group are investigated. In the confined range, we show that identifying the bound state spectrum with a Hagedorn one coming from noncritical closed superstring theory leads to a prediction for the value of the deconfining temperature Tc that agrees with recent lattice data. The deconfined ... -
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 ... -
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 ... -
ZN-balls: Existence and application to Yang-Mills plasma
02 juin 2022, CeREF TechniqueAutreConférence 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/ -
ZN-balls: Solitons from ZN-symmetric scalar field theory
28 novembre 2022, CeREF TechniqueArticle scientifiqueWe 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 ...
