ORBi Open Repository and Bibliography
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.
Virtualisation-Based Security Countermeasures in Software Runtime Systems - Gadaleta, Francesco
As systems become larger and more complex, the need to optimise the infrastructure in favour of reliability and redundancy becomes an imperative. Virtualisation technology seems to have partially fulfilled the needs dictated by growth by redefining the concept of infrastructure and paving the way for new business models such as cloud computing. As a matter of fact, successful low level attacks can circumvent or disable many of the traditional countermeasures in place within the same target system.
Another trend that, according to the security research community, might be a cause for concern in the near future, is the tendency to shift...
Multibody Modelling of Mechanical Transmission Systems in Vehicle Dynamics - Virlez, Geoffrey
This thesis addresses the dynamic modelling of automotive driveline components by means of the nonlinear finite element method for flexible multibody systems. Starting from a detailed study of an industrial application, the TORSEN differential, several contributions are proposed in the field of contact modelling. The contact between rigid bodies in several geometric configurations is investigated and the influence of the squeeze film of lubricating oil is studied. A contact formulation between flexible bodies modelled as superelements is also developed and applied to the modelling of 3D flexible gear pairs.
Rouvrir une mine à Plombières. Une utopie ? - Pirard, Eric
Plombières, Ferrières, Goldgrübe,… autant de noms qui dans nos régions renvoient aux sept métaux connus depuis l’Antiquité. Sept métaux comme les sept planètes ou les sept jours de la semaine à l’image d’un monde parfait.
Pourtant, si pendant des siècles, ces métaux ont suffi à satisfaire nos besoins technologiques, il n’en va plus de même aujourd’hui : l’éolienne a remplacé le moulin à vent et l’ordinateur s’est substitué à la craie ! Avec la production de 900.000 t de zinc et 100.000 t de plomb, les gisements de Moresnet ont eu une importance historique majeure dans le développement d’une véritable industrie...
Modal identification of time-varying systems using Hilbert transform and signal decomposition - Bertha, Mathieu; Golinval, Jean-Claude
The present work investigates modal identification of time-varying dynamical systems by exploiting the Hilbert transform. The proposed method, initially based on the Hilbert Vibration Decomposition (HVD) method, first identifies the instantaneous frequencies of the system. Their corresponding components and modal deflection shapes are then extracted from a set of dynamic responses of the system. The proposed method is first presented and then is illustrated on an experimental set-up. The system under investigation is a recurrent experiment in the field of time-varying systems consisting in a beam travelled by a non-negligible mass while excited by a random external force. The results...