References of "2012"
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See detailOn a Lie Algebraic Characterization of Vector Bundles
Lecomte, Pierre ULg; Leuther, Thomas ULg; Zihindula Mushengezi, Elie ULg

in Symmetry, Integrability and Geometry: Methods and Applications [=SIGMA] (2012)

We prove that a vector bundle E -> M is characterized by the Lie algebra generated by all differential operators on E which are eigenvectors of the Lie derivative in the direction of the Euler vector ... [more ▼]

We prove that a vector bundle E -> M is characterized by the Lie algebra generated by all differential operators on E which are eigenvectors of the Lie derivative in the direction of the Euler vector field. Our result is of Pursell-Shanks type but it is remarkable in the sense that it is the whole f ibration that is characterized here. The proof relies on a theorem of [Lecomte P., J. Math. Pures Appl. (9) 60 (1981), 229{239] and inherits the same hypotheses. In particular, our characterization holds only for vector bundles of rank greater than 1. [less ▲]

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See detailMicrostructure and mechanical properties of stir processed magnesium matrix composites reinforced with carbon fibres
Simar, Aude; Mertens, Anne ULg; Montrieux, Henri-Michel ULg et al

Conference (2012, January 26)

Mg-Al-Zn alloys have been reinforced with carbon fibres using friction stir processing (FSP) which appears as a promising alternative for the large-scale production of C-Mg composites. The process has ... [more ▼]

Mg-Al-Zn alloys have been reinforced with carbon fibres using friction stir processing (FSP) which appears as a promising alternative for the large-scale production of C-Mg composites. The process has shown its ability to produce sound composites with enhanced strength compared to the non-reinforced alloys. The C fabric is fragmented in short fibres leading to a reduction in grain size and an improved hardness. [less ▲]

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See detailMT1-MMP protects breast carcinoma cells against type I collagen-induced apoptosis
Maquoi, Erik ULg; Assent, Delphine; Detilleux, Julien et al

in Oncogene (2012), 31(4), 480-93

As invading breast carcinoma cells breach their underlying basement membrane, they become confronted with a dense three-dimensional reactive stroma dominated by type I collagen. To develop metastatic ... [more ▼]

As invading breast carcinoma cells breach their underlying basement membrane, they become confronted with a dense three-dimensional reactive stroma dominated by type I collagen. To develop metastatic capabilities, invading tumor cells must acquire the capacity to negotiate this novel microenvironment. Collagen influences the fate of epithelial cells by inducing apoptosis. However, the mechanisms used by invading tumor cells to evade collagen-induced apoptosis remain to be defined. We demonstrate that membrane type-1 matrix metalloproteinase (MT1-MMP/MMP-14) confers breast cancer cells with the ability to escape apoptosis when embedded in a collagen gel and after orthotopic implantation in vivo. In the absence of MMP-14-dependent proteolysis, type I collagen triggers apoptosis by inducing the expression of the pro-apoptotic Bcl-2-interacting killer in luminal-like breast cancer cells. These findings reveal a new mechanism whereby MMP-14 activity promotes tumor progression by circumventing apoptosis. [less ▲]

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See detailLe paysage institutionnel de l'enseignement supérieur en Belgique: l'état du projet du Ministre Marcourt à la date du colloque et les positions en présence.
Verjans, Pierre ULg

Conference (2012, January 26)

Le projet de restructuration de l'enseignement supérieur impulsé à la suite de l'accord gouvernemental 2009-2014 en Communauté française de Belgique inclut à la fois une structure faîtière unique, l ... [more ▼]

Le projet de restructuration de l'enseignement supérieur impulsé à la suite de l'accord gouvernemental 2009-2014 en Communauté française de Belgique inclut à la fois une structure faîtière unique, l'Académie de Recherche et à la fois des pôles géographiques d'organisation de l'enseignement supérieur. La communication tente de décrire quelle est la stratégie ministérielle et quelles sont les réactions institutionnelles. [less ▲]

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See detailLe futur centre intégré d'oncologie de Liège (CIO) : analyse des besoins de l'équipe de radiothérapie-oncologie. L'application des principes de 'healing environment'
JANSEN, Nicolas ULg

Conference given outside the academic context (2012)

Dans le cadre des projets futurs du CHU de Liege de construire un 'Centre Intégré d'Oncologie', les besoins du service de radiothérapie ont été analysés et documentés. Les points importants ont été ... [more ▼]

Dans le cadre des projets futurs du CHU de Liege de construire un 'Centre Intégré d'Oncologie', les besoins du service de radiothérapie ont été analysés et documentés. Les points importants ont été soulignés, comme entre autres la surface nécessaire, l'évolution rapide de la radiothérapie, le concept de 'healing environment', le cout potentiel, l'importance de la circulation, la communication avec le monde externe, ... [less ▲]

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See detailLa ville à l'heure des contraintes énergétiques
Reiter, Sigrid ULg

Conference (2012, January 26)

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See detailTotal Electron Content reconstruction using triple frequency GNSS signals
Spits, Justine ULg

Doctoral thesis (2012)

Nowadays, Global Navigation Satellite System (GNSS) provide accurate three dimensional positioning and navigation anywhere and anytime on the Earth’s surface and are being utilized in numerous civilian ... [more ▼]

Nowadays, Global Navigation Satellite System (GNSS) provide accurate three dimensional positioning and navigation anywhere and anytime on the Earth’s surface and are being utilized in numerous civilian and military applications. The US Global Positioning System (GPS) is currently being modernized to transmit radio signals on an additional third frequency, while the European Galileo is a newly developed system which will transmit on three civil frequency bands. One of the major error sources affecting GNSS is the delay caused when the signals pass through the ionosphere on their way to the Earth’s surface. This delay is inversely proportional to the square of the carrier frequency, and directly proportional to the Total Electron Content (TEC) of the ionosphere. In the last 20 years, several techniques using dual frequency GNSS measurements have been developed to estimate the TEC. With these techniques, systematic errors are confined to at least - 2.5 and 2.5 TECU for a mid-latitude site, and to at least - 5.5 and 5 TECU for a low-latitude location. In the last decades, knowledge about the ionosphere has grown considerably thanks to the use of GNSS measurements, and in turn the GNSS have highly benefited from this improved knowledge. Nowadays the availability of triple frequency GNSS signals enables the development of new processing techniques. We have therefore dedicated this work to developing a TEC reconstruction methodology based on triple frequency GNSS measurements and aimed at improving the accuracy of the final TEC values with regards to existing techniques. The structure of this study is as follows. Firstly, we provide information about GNSS, focusing on concepts, definitions and assumptions which will be used throughout this study. Then, we introduce the concepts of ionospheric propagation of radio signals and give a review of the literature on existing techniques used to extract the TEC with dual frequency GNSS measurements. We further present the complete design of the triple frequency TEC reconstruction methodology. We start by giving the set of combinations which allows us to resolve the original integer ambiguities, then we address the principles of TEC reconstruction, and finally we give an accuracy assessment of the computed TEC values. We also present an innovative technique to calibrate the satellite and receiver code hardware delays. We continue with testing the features developed on a simulated GPS and Galileo observation dataset, as well as on a real GIOVE observation dataset. Finally, we conclude this work by providing a critical overview of our investigations and suggesting various improvements of the current limitations. [less ▲]

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See detailFeeding Cyprinus carpio with infectious materials mediates cyprinid herpesvirus 3 entry through infection of pharyngeal periodontal mucosa
Fournier, Guillaume ULg; Boutier, Maxime ULg; Victor, Stalin Raj et al

in Veterinary Research (2012), 43(6),

Cyprinid herpesvirus 3 (CyHV-3), also known as Koi herpesvirus, is the etiological agent of a mortal disease in common and koi carp. Recently, we investigated the entry of CyHV-3 in carp using ... [more ▼]

Cyprinid herpesvirus 3 (CyHV-3), also known as Koi herpesvirus, is the etiological agent of a mortal disease in common and koi carp. Recently, we investigated the entry of CyHV-3 in carp using bioluminescence imaging and a CyHV-3 recombinant strain expressing luciferase (LUC). We demonstrated that the skin is the major portal of entry after inoculation of carp by immersion in water containing CyHV-3. While this model of infection mimics some natural conditions in which infection takes place, other epidemiological conditions could favour entry of virus through the digestive tract. Here, we investigated whether ingestion of infectious materials mediates CyHV-3 entry through the digestive tract. Carp were fed with materials contaminated with the CyHV-3 LUC recombinant (oral contamination) or immersed in water containing the virus (contamination by immersion). Bioluminescence imaging analyses performed at different times post-infection led to the following observations: (i) the pharyngeal periodontal mucosa is the major portal of entry after oral contamination, while the skin is the major portal of entry after contamination by immersion. (ii) Both modes of inoculation led to the spreading of the infection to the various organs tested. However, the timing and the sequence in which some of the organs turned positive were different between the two modes of inoculation. Finally, we compared the disease induced by the two inoculation modes. They led to comparable clinical signs and mortality rate. The results of the present study suggest that, based on epidemiological conditions, CyHV-3 can enter carp either by skin or periodontal pharyngeal mucosal infection. [less ▲]

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See detailNanotechnologies, et alors?
Thoreau, François ULg

Conference given outside the academic context (2012)

Detailed reference viewed: 20 (2 ULg)
See detailHypertriglycéridémie et rein
Krzesinski, Jean-Marie ULg

Conference (2012, January 24)

Detailed reference viewed: 14 (3 ULg)
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See detailApproches multi-échelles et éléments finis Solid-Shell
Duchene, Laurent ULg

Speech (2012)

Detailed reference viewed: 9 (3 ULg)
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See detailMoving Between Worlds: 'The Arrival'
Dony, Christophe ULg

in The Comics Grid: Journal of Comics Scholarship. Year One (2012), 1

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See detail(R)évolutions dans la gestion des eaux de surface
Dewals, Benjamin ULg

Scientific conference (2012, January 23)

Detailed reference viewed: 32 (15 ULg)
See detailLa régionalisation de l'impôt des personnes physiques
Bourgeois, Marc ULg

Scientific conference (2012, January 23)

Detailed reference viewed: 33 (3 ULg)
See detailImproved Domain Decomposition Method for the Helmholtz Equation"
Geuzaine, Christophe ULg; Antoine, X.; Boubendir, Y. et al

Scientific conference (2012, January 23)

Detailed reference viewed: 40 (2 ULg)
See detailLe site archéologique de la Schola du Trajan à Ostia Antica. Bilan et perspectives.
Morard, Thomas ULg

Conference given outside the academic context (2012)

Detailed reference viewed: 38 (6 ULg)