Recursos de colección

ORBi Open Repository and Bibliography (306.968 recursos)

In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision). This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.

Physical, chemical, mathematical & earth Sciences => Physics

Mostrando recursos 1 - 20 de 124

  1. A Mossbauer spectral Study of 121 Sb in several oxides

    Jafari, Atefeh; Mahmoud, Abdelfattah; Ronni E, Simon; Klobes, Benedikt; Hermann, Raphael
    Typical applications for antimony trioxide (Sb2O3) are as flame retardant synergist, as anode material for Li-ion batteries, as catalyst, as glass agent and as major component for several kinds of glasses. Recently, a structural study of the novel Co3Sb4O6F6 compound has been reported [1]. The presence of lone-pair of Sb3+ results in asymmetric coordination and makes this new compound promising like other non-centrosymmetric materials for chemical/biological sensors [1]. Application of 121Sb Mössbauer spectroscopy has been reported frequently [2-4]. We examine the environments of 121Sb in several compounds like α-, β-Sb2O3 and Co3Sb4O6F6 using Mössbauer spectroscopy. Moreover, nuclear forward scattering (NFS) of...

  2. Instrumentation, magnetic and electrical characterization of superconductors

    Vanderbemden, Philippe

  3. Magnetic shielding of open and semi-closed tubes made of bulk superconductors : the role of a cap

    Vanderbemden, Philippe; Wera, Laurent; Hogan, Kevin; Vanderheyden, Benoît; Fagnard, Jean-François; Namburi, D K; Shi, Y H; Cardwell, D A
    Peer reviewed

  4. Improvement of one-nucleon removal and total reaction cross sections in the Liège intranuclear-cascade model using Hartree-Fock-Bogoliubov calculations

    Rodriguez-Sanchez, Jose Luis; David, J.-C.; Mancusi, D.; Boudard, A.; Cugnon, Joseph; Leray, S.
    Peer reviewed

  5. Improvement of one-nucleon removal and total reaction cross sections in the Liège intranuclear-cascade model using Hartree-Fock-Bogoliubov calculations

    Rodriguez-Sanchez, Jose Luis; David, J.-C.; Mancusi, D.; Boudard, A.; Cugnon, Joseph; Leray, S.
    Peer reviewed

  6. Improvement of one-nucleon removal and total reaction cross sections in the Liège intranuclear-cascade model using Hartree-Fock-Bogoliubov calculations

    Rodriguez-Sanchez, Jose Luis; David, J.-C.; Mancusi, D.; Boudard, A.; Cugnon, Joseph; Leray, S.
    Peer reviewed

  7. Magnetic behaviour of a superconducting hollow cylinder subjected to crossed fields: Experimental and modelling results

    Fagnard, Jean-François; Dirickx, Michel; Vanderbemden, Philippe; Vanderheyden, Benoît
    Experiments are carried out to study the decay of the axial magnetization of a hollow cylinder subjected to a transverse magnetic field varying with a low frequency (a “crossed-fields” configuration). The measured sample is a Bi-2223 cylinder immersed in a bath of liquid nitrogen (T = 77 K). The transverse field is applied with a sinusoidal or a triangular waveform and with a single or a double polarity. Flux-creep effects are subtracted from the magnetization decay. The magnetic induction at the centre of the cylinder is characterized as a function of time; the features of its decay are related to...

  8. AC and heat losses in a superconductor cylinder surrounded by a metallic sheath

    Kirsch, Sébastien; Fagnard, Jean-François; Vanderbemden, Philippe; Vanderheyden, Benoît
    In this work, we study numerically the magneto-thermal properties of a composite cylinder made of a superconducting core surrounded by a metallic sheath and subjected to an axial AC magnetic field . The metal is ohmic and non-magnetic while the superconductor is characterized by an E(J) power law. The system is studied in a regime for which the temperature is non uniform (and hence the current density is varying spatially), in order to investigate heat draining by the cryofluid. The magneto-thermal problem is solved by the Brandt method for the magnetic part, associated with a standard discretization of the stationary...

  9. Model for the decay of the magnetization of a bulk superconductor for different sources of magnetic fields with a transverse component

    Vanderheyden, Benoît; Fagnard, Jean-François; Hogan, Kevin; Vanderbemden, Philippe
    Bulk (RE)BCO samples can be used as efficient trapped-field magnets with surface flux densities of a few teslas. However, their magnetization may decay over time when subjected to time-varying parasitic crossed fields (applied perpendicular to the initially trapped flux density). In this work, we consider and compare the magnetization decays that occur under different types of crossed-field perturbations, mimicking realistic perturbations that are expected in synchronous motors. The model is based on a finite element approach carried in the GetDP environment. The superconductor is modelled with an isotropic E(J) power law and a field-independent current density. Under a magnetic field...

  10. Time evolution of surface waves created by a walker on a vibrated bath

    Tadrist, Loïc; Shim, Jeong -Bo; Gilet, Tristan; Schlagheck, Peter

  11. Bouncing dynamics leads to the chaotic interaction of two walkers

    Tadrist, Loïc; Gilet, Tristan; Schlagheck, Peter

  12. Quantum-like statistics of deterministic wave-particle interactions in a circular cavity

    Gilet, Tristan

  13. Interaction of two walkers: locally generated chaos

    Tadrist, Loïc; Sampara, Naresh; Gilet, Tristan

  14. Quantum-like statistics of deterministic wave-particle interactions in a circular cavity

    Gilet, Tristan

  15. Orbiting droplets on a vibrated bath

    Sampara, Naresh; Burger, Loïc; Gilet, Tristan

  16. Schrödinger's drop in a box: wave-droplet interaction in a circular cavity

    Gilet, Tristan

  17. Detailed model of bouncing drops on a bounded, vibrated bath

    Blanchette, François; Gilet, Tristan

  18. A model for wave-droplet interaction in a confined environment

    Gilet, Tristan; Blanchette, François

  19. Injection of spin-polarized current in a Ge-based magnetic device with coplanar contacts

    Fourneau, Emile; Avila Osses, Jonathan; Silhanek, Alejandro; Nguyen, Ngoc Duy
    Electron spin injection and spin detection in magnetic materials are key features to the functionalization of electron spin polarization as a degree of freedom for both information processing and storage. Currently, spin-dependent tunneling in magnetic junction devices is the most common approach to achieve efficient spin injection. However, many recent studies highlighted the interesting possibility to create spin-polarized currents in structures which combine a magnetic semiconductor, e.g. magnetic alloys based on group-IV semiconductors or diluted magnetic semiconductor compounds, forming a Schottky-like rectifying junction with a metallic ferromagnet. Although theoretical works have already addressed the performance of this structure by numerical...

  20. Comment la « gamification » peut augmenter la réussite et la motivation des étudiants dans le cadre d’un cours de physique?

    Marique, Pierre-Xavier; Hoebeke, Maryse
    A l'entame de leurs études, les étudiants inscrits en première année de médecine ne sont pas friands de physique. Pourtant, ce cours fait bien partie de leur cursus, et à raison. Pour les aider à aborder les bases physiques de la médecine et les préparer à l’examen organisé sous forme de QCM, nous avons développé un outil en ligne, appelé « simulateur d’examens ». Grâce à celui-ci, l’étudiant peut générer des tests formatifs constitué de questions d’épreuves certificatives des années antérieures. En réussissant différents tests, il gagne alors des médailles (badges). L’introduction de cette dimension de gamification nous a permis d’observer...

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