References of "2012"
     in
Bookmark and Share    
See detailLa finance à découvert : journalisme d'investigation et sciences sociales
Geuens, Geoffrey ULg

Scientific conference (2012, March 20)

Detailed reference viewed: 40 (14 ULg)
See detailRadical coupling of polymers formed by cobalt-mediated radical polymerization
Debuigne, Antoine ULg; Hurtgen, Marie ULg; Jérôme, Christine ULg et al

in Matyjaszewski, Krzysztof; Sumerlin, Brent; Tsarevsky, Nicolas V. (Eds.) Progress in controlled radical polymerization: mechanisms and techniques (2012)

Considerable progress has been recently made in cobalt-mediated radical polymerization (CMRP), a controlled radical polymerization system based on the temporary deactivation of the polymer chains by a ... [more ▼]

Considerable progress has been recently made in cobalt-mediated radical polymerization (CMRP), a controlled radical polymerization system based on the temporary deactivation of the polymer chains by a cobalt complex, like the improvement of the mechanistic understanding, the extension to a range of monomers and the preparation of novel architectures. However, the real breakthrough in this field concerns the development of efficient radical coupling methods for polymer precursors preformed by CMRP. This book chapter aims to describe the general principle and main characteristics of such radical coupling techniques involving dienes, nitrones, fullerenes or carbon nanotubes. Well-defined and complex architectures obtained by these techniques are provided in order to illustrate their potential for macromolecular engineering. [less ▲]

Detailed reference viewed: 65 (9 ULg)
See detailConstraints on the Parental Melts of Enriched Shergottites from Image Analysis and High Pressure Experiments
Collinet, Max ULg; Medard, Etienne; Devouard, Bertrand et al

Poster (2012, March 20)

Martian basalts can be classified in at least two geochemically different families: enriched and depleted shergottites. Enriched shergottites are characterized by higher incompatible element ... [more ▼]

Martian basalts can be classified in at least two geochemically different families: enriched and depleted shergottites. Enriched shergottites are characterized by higher incompatible element concentrations and initial 87Sr/86Sr and lower initial 143Nd/144Nd and 176Hf/177Hf than depleted shergottites. It is now generally admitted that shergottites result from the melting of at least two distinct mantle reservoirs. Some of the olivine-phyric shergottites (either depleted or enriched), the most magnesian Martian basalts, could represent primitive melts, which are of considerable interest to constrain mantle sources. Two depleted olivine-phyric shergottites, Yamato 980459 and Nothwest Africa (NWA) 5789, are in equilibrium with their most magnesian olivine and their bulk rock compositions are inferred to represent primitive melts. Larkman Nunatak 06319 and NWA 1068, the most magnesian enriched basalts, have bulk Mg# that are too high to be in equilibrium with their olivine megacryst cores. Parental melt compositions have been estimated by subtracting the most magnesian olivine from the bulk rock composition, assuming that olivine megacrysts have partially accumulated. However, because this technique does not account for the actual petrography of these meteorites, we used image analysis to study these rocks history, reconstruct their parent magma and understand the nature of oli-vine megacrysts. Our image analysis results are supported by a series of high-pressure experiments performed on LAR 06319 bulk rock composition to test if it could represent a primitive melt, and understand its crystallization history. [less ▲]

Detailed reference viewed: 45 (10 ULg)
Full Text
See detailDegradation mechanisms of Prussian blue pigments in paint layers
Samain, Louise ULg

Doctoral thesis (2012)

Prussian blue is a modern synthetic pigment discovered in Berlin at the beginning of the eighteenth century. Prussian blue is a hydrated iron(III) hexacyanoferrate(II) complex and its color results from ... [more ▼]

Prussian blue is a modern synthetic pigment discovered in Berlin at the beginning of the eighteenth century. Prussian blue is a hydrated iron(III) hexacyanoferrate(II) complex and its color results from an intervalence charge transfer between the iron(II) and iron(III) ions when light is absorbed at ca. 700 nm. Because of both its highly intense color and its low cost, Prussian blue enjoyed immediate popularity among artists and was widely used as a pigment in paintings until the 1970's. However, the permanence of Prussian blue had already been questioned by the mid-eighteenth century, because it exhibits a tendency to fade in light and to turn green. The preparative methods were rapidly recognized as a contributory factor in the fading of the pigment. The main objective of this thesis is the identification of the degradation mechanisms of Prussian blue pigments in paint layers. Prussian blue was synthesized according to both ancient and modern preparation methods. A thorough analysis of the pigments revealed a dependency upon the type of synthesis, the crystallite size, and vacancy content, all properties that influence the local electronic and structural configurations of the iron ions in Prussian blue. The presence of nanocrystalline ferrihydrite as an undesirable iron containing reaction product was identified in Prussian blue pigments prepared according to eighteenth-century recipes. Discoloration upon light exposure in Prussian blue paint layers was induced by accelerated ageing. Pure Prussian blue painted in a dark shade is extremely light fast but fades when either painted in a lighter shade or mixed with white pigments. The fading of Prussian blue was attributed to a reduction of the iron(III) ions at the surface of the paint layer. A partial oxidation of Prussian blue in the entire paint layer was also observed. The analysis of works of art containing Prussian blue confirmed the combined oxidation and reduction of Prussian blue iron ions upon ageing. The study of alteration mechanisms in a painting pigment is essential both for conservation and historical studies in order to best preserve our cultural and artistic heritage with respect to an artist’s original intentions. [less ▲]

Detailed reference viewed: 289 (43 ULg)
See detailA Two Parameter Kinematic Theory for the Shear Behavior of Deep Beams
Mihaylov, Boyan ULg; Bentz, Evan; Collins, Michael

Conference (2012, March 19)

Detailed reference viewed: 34 (3 ULg)
Full Text
See detailDrowsiness monitoring: a matter of life and death !
Wertz, Jérôme ULg; François, Clémentine ULg; Verly, Jacques ULg

Conference (2012, March 19)

Detailed reference viewed: 41 (20 ULg)
See detailRossano Rosi: triangle amoureux et paternité
Demoulin, Laurent ULg

E-print/Working paper (2012)

Compte rendu du roman de Rossano Rosi Stabat Pater paru aux Impressions nouvelles en mars 2012.

Detailed reference viewed: 17 (2 ULg)
Full Text
See detailSOUTHERN BLUES NIGHT Heerlen, Hollande) 2012
Sacré, Robert ULg

E-print/Working paper (2012)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailStrategic Bypass Deterrence
Bloch, Francis; Gautier, Axel ULg

Conference (2012, March 17)

In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate ... [more ▼]

In liberalized network industries, entrants can either compete for service using the existing infrastructure (access) or deploy their own infrastructure capacity (bypass). In this paper, we demonstrate that, under the threat of bypass, the access price set by an unregulated and vertically integrated incumbent is compatible with productive efficiency. This means that the entrant bypasses the existing infrastructure only if it can produces the network input more efficiently. The incumbent lowers the access price compared to the ex-post efficient level to strategically deter inefficient bypass by the entrant. Accordingly, from a productive efficiency point of view, there is no need to regulate access prices when the entrant has the option to bypass. Despite that, we show that restricting the possibilities of access might be profitable for consumers. [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailInsuffisance rénale de la personne âgée
Krzesinski, Jean-Marie ULg

Conference (2012, March 17)

L’insuffisance rénale avec l’âge n’est pas une fatalité. Il faut prévenir très tôt les facteurs de risque cardio-vasculaire et les corriger au mieux pour éviter que ces facteurs n’agissent plus tard dans ... [more ▼]

L’insuffisance rénale avec l’âge n’est pas une fatalité. Il faut prévenir très tôt les facteurs de risque cardio-vasculaire et les corriger au mieux pour éviter que ces facteurs n’agissent plus tard dans la vie et soient des facteurs de comorbidité très importants favorisant la dégradation fonctionnelle rénale et l’évolution vers une insuffisance rénale très sévère exposant le patient à un risque cardio-vasculaire, à des techniques de suppléance de la fonction rénale et à un décès plus rapide avec perte préalable de la qualité de vie. Il faut donc identifier précocement la réduction de la GFR et l’apparition d’une protéinurie, agir de concert ensemble sur de nombreux facteurs pour ralentir la progression. Ces facteurs sont souvent des facteurs de risque cardio-vasculaire, donc on fait un double coup en les corriger. La référence précoce lorsque vous remarquez une évolutivité de la GFR vers la baisse pour décider ensemble si un traitement de suppléance doit être lancé. Celui-ci ne sera décidé qu’en concertation commune si nous avons le temps de l’établir après avoir évaluer des niveaux d’autonomie de nutrition, de risque cardio-vasculaire, et tout cela intégré dans le côté social et environnemental du patient. Il faut rappeler ici l’importance des trajets de soins à proposer à tout patient insuffisant rénal en dessous de 45 ml/min, moment stratégique pour que le néphrologue puisse en partenariat avec le médecin généraliste contrer les perturbations de l’insuffisance rénale terminale. [less ▲]

Detailed reference viewed: 42 (5 ULg)
Full Text
See detailInsuffisance rénale de la personne âgée
Krzesinski, Jean-Marie ULg

Conference (2012, March 17)

•L’insuffisance rénale avec l’âge n’est pas une fatalité. •Une prévention des FRCV est indispensable. •Une identification précoce d’une réduction de GFR (mesure précise GFR?) et de la présence d’une ... [more ▼]

•L’insuffisance rénale avec l’âge n’est pas une fatalité. •Une prévention des FRCV est indispensable. •Une identification précoce d’une réduction de GFR (mesure précise GFR?) et de la présence d’une protéinurie est capitale. •Approche multidisciplinaire et précoce surtout chez le sujet âgé! Tester autonomie et dénutrition. •Référence précoce pour décider ensemble si évolutivité et SN traitement de suppléance. •Décider de lancer un traitement de suppléance nécessite une réflexion à plusieurs: le patient, sa famille, le médecin de famille, l’équipe de néphrologie en abordant la QOL •On peut tenter si doute, avec arrêt dès que la situation s’aggrave! [less ▲]

Detailed reference viewed: 10 (3 ULg)
Full Text
See detailComment mieux concilier le Sport et l’Education ?
Cloes, Marc ULg

Conference (2012, March 17)

Nombre d'articles parus dans des quotidiens soulignent qu'une plus grande place devrait être faite au Sport dans l'Education. Dans cette conférence, il s'agira tout d'abord de redéfinir les différents ... [more ▼]

Nombre d'articles parus dans des quotidiens soulignent qu'une plus grande place devrait être faite au Sport dans l'Education. Dans cette conférence, il s'agira tout d'abord de redéfinir les différents concepts concernés avant de mettre en évidence certains paradoxes constatés à partir de résultats de recherches récentes. L'objectif consistera à mettre clairement en évidence la priorité à accorder au développement d'une culture de l'activité physique, moins sujettes aux dérapages constatés actuellement dans le développement d'un sport ultra compétitif. L'exposé se termine par la description de pistes d'actions rassemblant tous les acteurs de la société et visant à donner un visage plus accessible à la santé que l'activité physique permet de préserver. [less ▲]

Detailed reference viewed: 69 (6 ULg)
Full Text
Peer Reviewed
See detailNeuroimmune connections in ovine pharyngeal tonsil: potential site for prion neuroinvasion
Toppets, Vinciane ULg; Piret, Joëlle ULg; Kirschvink, Nathalie et al

in Cell & Tissue Research (2012)

Recent studies have proved the possible implication of nasal associated lymphoid tissues, mainly the pharyngeal tonsil, in prion pathogenesis. However, the mechanisms of this neuroinvasion are still being ... [more ▼]

Recent studies have proved the possible implication of nasal associated lymphoid tissues, mainly the pharyngeal tonsil, in prion pathogenesis. However, the mechanisms of this neuroinvasion are still being debated. To determine the potential sites for prion neuroinvasion inside the ovine pharyngeal tonsil, the topography of neurofilaments heavy (200 kDa) (NFH), neurofilaments light (70 kDa) (NFL) and glial fibrillar acidic protein (GFAP) was semi-quantitatively analysed inside the different compartments of the tonsil. The results showed that the most innervated areas were the interfollicular area and the connective tissue located beneath the respiratory epithelium. Even if the germinal centre of the lymphoid follicles was poorly innervated, the existence of rare follicular dendritic cell-nerve synapses inside the germinal centre indicates that this mechanism of neuroinvasion is possible but unlikely to be unique. The host PRNP genotype did not influence the pattern of innervation in these different tonsil compartments, unlike age: an increase of nerve endings in a zone of high trafficking cells beneath the respiratory epithelium occurred with ageing. A minimal age-related increase of innervation inside the lymphoid follicles was also observed. An increase in nerve fibre density around the lymphoid follicles, in an area rich in mobile cells able to transport PrPd, could ensure a more efficient infectivity, not in the early phase but in the advanced phase of lymphoinvasion after amplification of PrPd, or could act as direct site of entry during neuroinvasion. [less ▲]

Detailed reference viewed: 17 (5 ULg)
Full Text
Peer Reviewed
See detailCreation of two vortex-entangled beams in a vortex-beam collision with a plane wave
Ivanov, Igor ULg

in Physical Review. A : General Physics (2012), 85(3), 0338131-4

The physics of photons and electrons carrying orbital angular momentum (OAM) is an exciting field of research in quantum optics and electron microscopy. Usually, one considers propagation of these vortex ... [more ▼]

The physics of photons and electrons carrying orbital angular momentum (OAM) is an exciting field of research in quantum optics and electron microscopy. Usually, one considers propagation of these vortex beams in a medium or an external field and their absorption or scattering on fixed targets. Here we consider instead a beam-beam collision. We show that elastic scattering of a Bessel vortex beam with a counterpropagating plane wave naturally leads to two vortex-entangled outgoing beams. The vortex entanglement implies that the two final particles are entangled not only in their orbital helicities but also in the opening angles of their momentum cones. Our results are driven by kinematics of vortex-beam scattering and apply to particle pairs of any nature: eγ, e+e−, ep, etc. This collisional vortex entanglement can be used to create pairs of OAM-entangled particles of different nature and to transfer a phase vortex, for example, from low-energy electrons to high-energy protons. [less ▲]

Detailed reference viewed: 22 (9 ULg)
Full Text
Peer Reviewed
See detailSocial Cooperatives: When Social Enterprises Meet the Cooperative Tradition
Defourny, Jacques ULg

Conference (2012, March 16)

Detailed reference viewed: 31 (4 ULg)
See detailLa publication : quelle stratégie ?
Dozo, Björn-Olav ULg

Scientific conference (2012, March 16)

Detailed reference viewed: 9 (4 ULg)
Peer Reviewed
See detail"Frottements d'images : les films tardifs de Paul Sharits"
Belloi, Livio ULg

Conference (2012, March 16)

La notion de friction implique forcément celle de contact, ce qui, à l’évidence, intéresse au tout premier chef les images à caractère photochimique. Dans le cadre de cette communication, j'interroge la ... [more ▼]

La notion de friction implique forcément celle de contact, ce qui, à l’évidence, intéresse au tout premier chef les images à caractère photochimique. Dans le cadre de cette communication, j'interroge la notion de friction dans le champ du cinéma d’expérimentation, en me concentrant plus particulièrement sur les films du cinéaste (et peintre) américain Paul Sharits (1943-1993). À partir de "Color Sound Frames" (1974), l’œuvre de Sharits connaît une mutation profonde. Pour une large part, le travail du cinéaste consistera désormais à refilmer des fragments de pellicule déjà impressionnés, images appartenant de facto à la catégorie du déjà-vu. Pour ce faire, Sharits mobilise un écran transparent et un projecteur trafiqué, dont il a ôté et la griffe, et le mécanisme d’obturation. Retournant l’une contre l’autre les deux machines sur lesquelles se fonde le spectacle cinématographique, procédant par « anti-cadrage » et reprise de vue, le cinéaste orchestre, au plus intime de ses œuvres, d’intenses rapports de friction entre le film second (ou film filmé) et le film premier (ou film d’accueil, celui qui se déroule sous nos yeux) ; il accuse, de manière très méthodique, les discordances qui affectent les deux niveaux de la représentation, que ce soit en termes de vitesse, de texture ou de stabilité des motifs. Ma communication se donne pour but d’étudier, dans tous ses enjeux, les frictions internes qui traversent les films tardifs de Paul Sharits, dont "Tails" (1976) et "Bad Burns" (1982). Dans le cas de ce dernier film, le rapport de friction s’exacerbe, se déporte et tourne au conflit ouvert entre l’image et la source lumineuse censée lui donner vie : il se solde ponctuellement par des destructions apparentes du support filmique, petits désastres figuratifs qui ont paradoxalement valeur, selon Sharits, d’actes analytiques à part entière. [less ▲]

Detailed reference viewed: 48 (0 ULg)
Full Text
See detailLa Cour pénale internationale, une guerre en retard ?
Deprez, Christophe ULg

Article for general public (2012)

Detailed reference viewed: 60 (27 ULg)
Full Text
See detailLe contrôle de la glycémie
Penning, Sophie ULg; Massion, Paul

Scientific conference (2012, March 16)

Detailed reference viewed: 31 (5 ULg)