Last 7 days
Bookmark and Share    
Peer Reviewed
See detailSartre et l'instinct de mort
Cormann, Grégory ULg

in Gyemant, Maria; Popa, Delia (Eds.) Approches phénoménologiques de l'inconscient (2015)

Detailed reference viewed: 38 (7 ULg)
Full Text
Peer Reviewed
See detailAnalysis of high frequency geostationary ocean colour data using DINEOF
Alvera Azcarate, Aïda ULg; Vanhellemont, Quinten; Ruddick, Kevin et al

in Estuarine Coastal & Shelf Science (2015), 159

DINEOF (Data Interpolating Empirical Orthogonal Functions), a technique to reconstruct missing data, is applied to turbidity data obtained through the Spinning Enhanced Visible and Infrared Imager (SEVIRI ... [more ▼]

DINEOF (Data Interpolating Empirical Orthogonal Functions), a technique to reconstruct missing data, is applied to turbidity data obtained through the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on board Meteosat Second Generation 2. The aim of this work is to assess if the tidal variability of the southern North Sea in 2008 can be accurately reproduced in the reconstructed dataset. Such high frequency data have not previously been analysed with DINEOF and present new challenges, like a strong tidal signal and long night-time gaps. An outlier detection approach that exploits the high temporal resolution (15 min) of the SEVIRI dataset is developed. After removal of outliers, the turbidity dataset is reconstructed with DINEOF. In situ Smartbuoy data are used to assess the accuracy of the reconstruction. Then, a series of tidal cycles are examined at various positions over the southern North Sea. These examples demonstrate the capability of DINEOF to reproduce tidal variability in the reconstructed dataset, and show the high temporal and spatial variability of turbidity in the southern North Sea. An analysis of the main harmonic constituents (annual cycle, daily cycle, M2 and S2 tidal components) is performed, to assess the contribution of each of these modes to the total variability of turbidity. The variability not explained by the harmonic fit, due to the natural processes and satellite processing errors as noise, is also assessed. [less ▲]

Detailed reference viewed: 16 (1 ULg)
Full Text
See detailLa Bildwissenschaft dans le sillage de l’iconologie
Hagelstein, Maud ULg

Conference (2015)

Il est tout à fait commun aujourd’hui de constater l’omniprésence et la prolifération des images dans nos sociétés. Depuis quelques années (voire quelques décennies), la théorie contemporaine s’est ... [more ▼]

Il est tout à fait commun aujourd’hui de constater l’omniprésence et la prolifération des images dans nos sociétés. Depuis quelques années (voire quelques décennies), la théorie contemporaine s’est redéployée sur de nouveaux territoires disciplinaires en développant un outillage conceptuel inédit. Des débats assez vifs ont naturellement accompagné ce redéploiement (dont je vais très vite, vous allez le comprendre, relativiser la nouveauté). Or, le domaine (pseudo-)émergeant des études visuelles réclame une enquête épistémologique approfondie, vouée non pas à dessiner un programme théorique fédérateur/homogène, mais à cartographier au moins la variété des points de vue adoptés sur l’image et, peut-être, à dégager quelques axes problématiques communs. Le projet général de ces journées consiste notamment à montrer comment les recherches récentes entreprises par les principaux protagonistes de la théorie de l’image contemporaine (allemande) s’inscrivent dans le cadre d’une réflexion large sur l’héritage de l’iconologie. Ceci me semble le passage obligé d’une enquête sur les enjeux épistémologiques (méthodologiques) de la théorie de l’image actuelle. En effet, du point de vue de son ancrage philosophique, la théorie de l’image contemporaine puise ses principales ressources conceptuelles dans l’iconologie critique – discipline d’interprétation des images inaugurée en 1912 par le théoricien de l’art Aby Warburg (1866-1929), nourrie par la philosophie des formes symboliques de Ernst Cassirer (1874-1945), et systématisée par Erwin Panofsky (1892-1968) dans ses Essais d’iconologie (1939), notamment. Ce segment de l’historiographie (années 1920-1930), redécouvert à la fin des années 1980 (pour ce qui est de Warburg en tout cas), a fortement marqué toute une génération d’intellectuels. Il s’agira entre autres ici de faire apparaître l’impulsion qu’a donnée la critique (parfois sévère/injuste) des travaux de Panofsky (surtout) à la Bildwissenschaft. Visant l’interprétation du contenu symbolique des images, la méthode iconologique concevait l’art comme l’un des domaines essentiels de production de sens, c’est-à-dire un domaine d’expression dont la vocation principale serait de charger de sens des éléments sensibles/matériels, en s’inscrivant de surcroit dans un contexte socio-historique spécifique puisque l’œuvre reflète/révèle une vision du monde historiquement déterminée que l’iconologue met au jour. Partant de là, la critique la plus basique (et néanmoins commune) consiste à dire (et à redire inlassablement) que Panofksy semble avoir, au moment de l’institution de cette méthode, écarté la plupart du temps les préoccupations formelles (tout ce qui concerne les couleurs, par ex., les traits et toutes les qualités proprement plastiques/picturales) pour se concentrer avec plus d’insistance sur les éléments de contenu et analyser au mieux les liens de l’œuvre d’art aux significations, aux idées. [less ▲]

Detailed reference viewed: 12 (0 ULg)
Full Text
See detailDynamiser la ville par l'art, une ambition raisonnable ? (discussion publique avec Sarah Jonet - projet Chic and Cheap)
Hagelstein, Maud ULg

Conference given outside the academic context (2015)

Comment, à la fois, valoriser le travail des artistes plasticiens, soutenir la construction d’une communauté urbaine et accompagner une dynamique de réhabilitation des commerces inoccupés ? Telle est ... [more ▼]

Comment, à la fois, valoriser le travail des artistes plasticiens, soutenir la construction d’une communauté urbaine et accompagner une dynamique de réhabilitation des commerces inoccupés ? Telle est l’ambition de Chic And Cheap, ce dispositif artistico-urbain qui propose depuis sept ans déjà des galeries intra et extra muros temporaires dans la ville de Liège. A partir d’une présentation de ce projet, de ses réalisations passées et actuelles, on se demandera si l’art peut dynamiser une ville, s’il peut être un facteur de cohésion sociale ou de sécurisation des territoires. La question des potentialités et limites d’installations d’art contemporain en ville sera ainsi éclairée. On se demandera aussi comment l’art public, qu’il soit dit de commande ou sauvage, tente d’apporter une réponse esthétique au vivre ensemble (texte de présentation : Rachel Brahy) [less ▲]

Detailed reference viewed: 18 (0 ULg)
Full Text
Peer Reviewed
See detailIsolated response curves in a base-excited, two-degree-of-freedom, nonlinear system
Noël, Jean-Philippe ULg; Detroux, Thibaut ULg; Masset, Luc ULg et al

in Proceedings of the ASME 2015 International Design Engineering Technical Conferences (2015)

In the present paper, isolated response curves in a nonlinear system consisting of two masses sliding on a horizontal guide are examined. Transverse springs are attached to one mass to provide the ... [more ▼]

In the present paper, isolated response curves in a nonlinear system consisting of two masses sliding on a horizontal guide are examined. Transverse springs are attached to one mass to provide the nonlinear restoring force, and a harmonic motion of the complete system is imposed by prescribing the displacement of their supports. Numerical simulations are carried out to study the conditions of existence of isolated solutions, their bifurcations, their merging with the main response branch and their basins of attraction. This is achieved using tools including nonlinear normal modes, energy balance, harmonic balance-based continuation and bifurcation tracking, and global analysis. [less ▲]

Detailed reference viewed: 15 (1 ULg)
Full Text
See detailPERFORMANCE ET INVENTION. LE LABORATOIRE DE L’EXPERIENCE ESTHETIQUE
Hagelstein, Maud ULg

E-print/Working paper (2015)

Lorsqu’il cherche à qualifier l’époque de l’art dans laquelle nous baignons actuellement, le philosophe Jacques Rancière parle d’un régime pour lequel l’expérience esthétique serait déterminante ... [more ▼]

Lorsqu’il cherche à qualifier l’époque de l’art dans laquelle nous baignons actuellement, le philosophe Jacques Rancière parle d’un régime pour lequel l’expérience esthétique serait déterminante : sensible (par définition) et prise dans un rapport paradoxal de continuité et d’exception avec l’expérience commune. Le régime esthétique de l’art – celui qui affecte les productions artistiques contemporaines – signerait notamment l’effacement des spécificités des arts (et l’abandon du régime très hiérarchisé des Beaux-Arts) au profit d’une expérience sensible commune à toutes les formes d’expression artistiques . Le propre de l’art serait donc de faire vivre à son spectateur une telle expérience, qui toucherait directement ses sens et son imagination. Une expérience dont la tonalité particulière serait directement reconnaissable. Une expérience en excès par rapport à ses habitudes et qui le ferait basculer progressivement dans le domaine si singulier de l’art. On voudrait ici défendre l’idée suivante : la performance artistique semble l’une des animatrices principales de ce régime contemporain en tant qu’elle vise à dégager – au-delà des particularismes des médias d’expression – un territoire très large (un laboratoire) d’expérimentation pour l’art. À travers leurs propositions, les artistes performeurs ne produisent pas des œuvres d’art (c’est-à-dire des produits finis), ils montrent le travail de la créativité à l’œuvre. [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
See detailThe Brussels Court judgement in Commission v Elevators manufacturers, or the story of how the Commission lost an action for damages based on its own infringement decision.
Marcos Ramos, Jorge ULg; Muheme, Daniel ULg

Diverse speeche and writing (2015)

With the proceedings before the Brussels Court, the Commission emphasized its growing need to promote claims for damages for infringements of EU Competition law. Ahead of the implementation of the Damages ... [more ▼]

With the proceedings before the Brussels Court, the Commission emphasized its growing need to promote claims for damages for infringements of EU Competition law. Ahead of the implementation of the Damages Directive, and with its own infringement decision in hand, this claim seemed to be an easy exercise for the Commission to recoup the allegedly surplus paid for the maintenance contracts. [less ▲]

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailAn automated statistical shape model developmental pipeline: application to the human scapula and humerus
Mutsvangwa, Tinashe; Burdin, Valérie; Schwartz, Cédric ULg et al

in IEEE Transactions on Biomedical Engineering (2015), 62(4), 1098-1107

This work presents development of statistical shape models based on robust and rigid-groupwise registration followed by pointset non-rigid registration. The main advantages of the pipeline include ... [more ▼]

This work presents development of statistical shape models based on robust and rigid-groupwise registration followed by pointset non-rigid registration. The main advantages of the pipeline include automation in that the method does not rely on manual landmarks or a regionalization step; there is no bias in the choice of reference during the correspondence steps and the use of the Probabilistic Principal Component Analysis framework increases the domain of the shape variability. A comparison between the widely used Expectation Maximization- Iterative Closest Point algorithm and a recently reported groupwise method on publicly available data (hippocampus) using the well-known criteria of generality, specificity and compactness is also presented. The proposed method gives similar values but the curves of generality and specificity are superior to those of the other two methods. Finally the method is applied to the human scapula, which is a known difficult structure, and the human humerus. [less ▲]

Detailed reference viewed: 13 (4 ULg)
Full Text
Peer Reviewed
See detailCoopératives et démocratie : un état des lieux de la question pour encourager la vitalité démocratique des coopératives
Rijpens, Julie ULg; Jonet, Christian; Mertens de Wilmars, Sybille ULg

in Van Gyes, Guy; De Spiegelaere, Stan (Eds.) L'entreprise de nous tous. Innover la participation des travailleurs en Belgique (2015)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailManuels de langues et risques d'inégalités
Simons, Germain ULg; Delbrassine, Daniel ULg; Van Hoof, Florence ULg

in Didactiques en pratique (2015), (1), 44-46

Dans cet article synthétique, les auteurs relèvent quelques caractéristiques de certains manuels de langues contemporains et démontrent en quoi celles-ci présentent des risques d'inégalités pour les ... [more ▼]

Dans cet article synthétique, les auteurs relèvent quelques caractéristiques de certains manuels de langues contemporains et démontrent en quoi celles-ci présentent des risques d'inégalités pour les apprenants. [less ▲]

Detailed reference viewed: 26 (11 ULg)
Full Text
Peer Reviewed
See detailFunctional analysis of the three HMA4 copies of the metal hyperaccumulator Arabidopsis halleri
Nouet, Cécile ULg; Charlier, Jean-Benoit; Carnol, Monique ULg et al

in Journal of Experimental Botany (2015), in press

In Arabidopsis halleri, the AhHMA4 gene has an essential function in Zn/Cd hypertolerance and hyperaccumulation by mediating root to shoot translocation of metals. Constitutive high expression of AhHMA4 ... [more ▼]

In Arabidopsis halleri, the AhHMA4 gene has an essential function in Zn/Cd hypertolerance and hyperaccumulation by mediating root to shoot translocation of metals. Constitutive high expression of AhHMA4 results from a tandem triplication and cis-activation of the promoter of all three copies. The three AhHMA4 copies possess divergent promoter sequences, but highly conserved coding sequences, and display identical expression profiles in the root and shoot vascular system. Here, we expressed an AhHMA4::GFP fusion under the control of each three A. halleri HMA4 promoters in a hma2hma4 double mutant of Arabidopsis thaliana to individually examine the function of each A. halleri AhHMA4 copy. The protein localized non-polarly at the plasma membrane of the root pericycle cells of both A. thaliana and A. halleri. The expression of each AhHMA4::GFP copy complemented the severe Zn deficiency phenotype of the hma2hma4 mutant by restoring root-to-shoot translocation of zinc. However, each copy had different impact on metal homeostasis in the A. thaliana genetic background: AhHMA4 copies 2 and 3 were more highly expressed and provided higher Zn tolerance in roots and accumulation in shoots than copy 1, whereas AhHMA4 copy 3 also increased Cd tolerance in roots. Our data suggest a certain extent of functional differentiation among the three A. halleri HMA4 copies, stemming from differences in expression levels rather than in expression profile. HMA4 is a key node of the Zn homeostasis network and small changes in expression level can have major impact on Zn allocation to root or shoot tissues. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailThe astronomical calibration of the Givetian (Middle Devonian) timescale (Dinant Synclinorium, Belgium)
De Vleeschouwer, David; Boulvain, Frédéric ULg; Da Silva, Anne-Christine ULg et al

in Special Publication - Geological Society of London (2015), 414

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth’s ... [more ▼]

Recent advances in radiometric dating result in significant improvements in the geological timescale and provide better insight into the timing of various processes and evolutions within the Earth’s system. However, no radiometric ages are contained within the Givetian. Consequently, the absolute ages of the Givetian Stage boundaries, as well as the stage’s duration, remain poorly constrained. As an alternative, the analysis of sedimentary cycles allows for the estimation of the duration of this stage. We examined the high-resolution magnetic susceptibility signals of four Givetian outcrops in the Givet area for a possible astronomical imprint, to fully understand the rates of evolutionary and environmental change. All four sections are firmly correlated and wavelet analyses of the magnetic susceptibility signals reveal the imprint of astronomical eccentricity forcing. The highly stable 405 kyr cycles constrain the duration of the Givetian Stage at 4.35+0.45 Myr, which is in good agreement with the International Chronostratigraphic Chart (5.0 Myr). The studied sections also exhibit an imprint of obliquity, suggesting a climatic teleconnection between low and high latitudes. The corresponding microfacies curves demonstrate similar astronomical imprint, and thereby indicate that the observed 10 5year-scale cyclicity is the result of climatic and environmental change [less ▲]

Detailed reference viewed: 17 (5 ULg)
Full Text
Peer Reviewed
See detailSedimentary development and magnetic susceptibility evolution of the Frasnian in Western Belgium (Dinant Synclinorium, La Thure section)
Pas, Damien ULg; Da Silva, Anne-Christine ULg; Develeeschouwer, Xavier et al

in Special Publication - Geological Society of London (2015), 414

Recent opening of the La Thure quarry in Western Belgium allowed the collection of new data from a poorly outcropping area of the Belgian Frasnian platform. The studied section covers an interval ... [more ▼]

Recent opening of the La Thure quarry in Western Belgium allowed the collection of new data from a poorly outcropping area of the Belgian Frasnian platform. The studied section covers an interval extending from thefalsiovalis to hassi s.l. Zones. Sedimentological analyses allowed the reconstruction of depositional settings in the northwestern part of the Dinant Synclinorium after the demise of the extended Givetian carbonate platform. Two depositional models are distinguished: (a) siliciclastic drowned platform during the Early Frasnian; and (b) a forereef depositional setting belonging to a rimmed shelf during the Middle Frasnian. Moreover, interpreted depositional settings in the northwestern part of the Dinant Synclinorium allowed to constraint the direction of the main facies belts for the Belgian Frasnian platform. Combination of MS and geochemistry demonstrates the inherent-parallel link existing between variation in MS values and proxy for terrestrial input (such as Si and Al). This observation means that, despite the remagnetization occurring within the Belgian Frasnian lithologies, the main trends in the MS signal from the La Thure section still reflect some syn-sedimentary conditions. The increase in MS and clastic input proxies recorded in distal fore-reef deposit within the punctata Zone are likely to be considered as enhanced by rapid and strong shallowing events recognized in the ‘puncataEvent’ interval. [less ▲]

Detailed reference viewed: 32 (7 ULg)
Full Text
See detailA method to search for large-scale concavities in asteroid shape models
Devogele, Maxime ULg; Rivet, Jean-Pierre; Tanga, Paolo et al

in Monthly Notices of the Royal Astronomical Society (2015)

Light curve inversion is proven to produce an unique model solution only under the hypothesis that the asteroid is convex. However, it was suggested that the resulting shape model, for the case of non ... [more ▼]

Light curve inversion is proven to produce an unique model solution only under the hypothesis that the asteroid is convex. However, it was suggested that the resulting shape model, for the case of non-convex asteroid, is the convex-hull of the true asteroid non-convex shape. While a convex shape is already useful to provide the overall aspect of the target, much information about real shapes is missed, as we know that asteroids are very irregular. It is a commonly accepted evidence that large flat areas sometimes appearing on shapes derived from light curves correspond to concave areas, but this information has not been further explored and exploited so far. We present in this paper a method that allows to predict the presence of concavities from such flat regions. This method analyzes the distribution of the local normals to the facets composing shape models to predict the presence of abnormally large flat surfaces. In order to test our approach, we consider here its application to a large family of synthetic asteroid shapes, and to real asteroids with large scale concavities, whose detailed shape is known by other kinds of observations (radar and spacecraft encounters). The method that we propose is proven to be reliable and capable of providing a qualitative indication of the relevance of concavities on well-constrained asteroid shapes derived from purely photometric data sets. [less ▲]

Detailed reference viewed: 19 (0 ULg)
Full Text
See detailCompte rendu de l'ouvrage d'I. Mazzini, Letteratura e medicina nel mondo antico, Rome: Università La Sapienza, 2011
Ricciardetto, Antonio ULg

in Latomus : Revue d'Etudes Latines (2015), 74(1), 280-282

Detailed reference viewed: 58 (14 ULg)
Full Text
Peer Reviewed
See detailMutation of the iron-sulfur cluster assembly gene IBA57 causes fatal infantile leukodystrophy.
DEBRAY, François-Guillaume ULg; Stumpfig, Claudia; Vanlander, Arnaud V. et al

in Journal of inherited metabolic disease (2015)

Leukodystrophies are a heterogeneous group of severe genetic neurodegenerative disorders. A multiple mitochondrial dysfunctions syndrome was found in an infant presenting with a progressive ... [more ▼]

Leukodystrophies are a heterogeneous group of severe genetic neurodegenerative disorders. A multiple mitochondrial dysfunctions syndrome was found in an infant presenting with a progressive leukoencephalopathy. Homozygosity mapping, whole exome sequencing, and functional studies were used to define the underlying molecular defect. Respiratory chain studies in skeletal muscle isolated from the proband revealed a combined deficiency of complexes I and II. In addition, western blotting indicated lack of protein lipoylation. The combination of these findings was suggestive for a defect in the iron-sulfur (Fe/S) protein assembly pathway. SNP array identified loss of heterozygosity in large chromosomal regions, covering the NFU1 and BOLA3, and the IBA57 and ABCB10 candidate genes, in 2p15-p11.2 and 1q31.1-q42.13, respectively. A homozygous c.436C > T (p.Arg146Trp) variant was detected in IBA57 using whole exome sequencing. Complementation studies in a HeLa cell line depleted for IBA57 showed that the mutant protein with the semi-conservative amino acid exchange was unable to restore the biochemical phenotype indicating a loss-of-function mutation of IBA57. In conclusion, defects in the Fe/S protein assembly gene IBA57 can cause autosomal recessive neurodegeneration associated with progressive leukodystrophy and fatal outcome at young age. In the affected patient, the biochemical phenotype was characterized by a defect in the respiratory chain complexes I and II and a decrease in mitochondrial protein lipoylation, both resulting from impaired assembly of Fe/S clusters. [less ▲]

Detailed reference viewed: 5 (4 ULg)
Full Text
Peer Reviewed
See detailMagnetic susceptibility application – a window onto ancient environments and climatic variations: Foreword
Da Silva, Anne-Christine ULg; Whalen; Hladil et al

in Special Publication - Geological Society of London (2015), 414

Detailed reference viewed: 8 (0 ULg)
See detailMagnetic susceptibility application – a window onto ancient environments and climatic variations
Da Silva, Anne-Christine ULg; Whalen; Hladil et al

Book published by geological Society of London (2015)

Detailed reference viewed: 13 (0 ULg)