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See detailFamilial pituitary adenomas : current concepts and perspectives
jaffrain-Rea, ML; Beckers, Albert ULg

in Abstract book - National Symposium in Endocrinology - Romanian Society of Endocrinology (2012, April)

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See detailVideos in motion: Processes of Transnationalization in the Southern Nigerian Video Industry: Networks, Discourses, Aesthetics
Jedlowski, Alessandro ULg

Doctoral thesis (2012)

On the ground of a three years-long multi-sited, ethnographic research conducted in Southern Nigeria, Italy and the United Kingdom, my PhD dissertation analyzes the processes of transnationalization that ... [more ▼]

On the ground of a three years-long multi-sited, ethnographic research conducted in Southern Nigeria, Italy and the United Kingdom, my PhD dissertation analyzes the processes of transnationalization that have affected the southern Nigerian video film industry (Nollywood) during the first decade of the 2000s, and interpret their significance in relation to the industry’s history and recent developments. Transnationalization processes have affected the industry at different levels, which include its economic and social organization, its international representation, and the narrative and aesthetic features of the films it produces. The dissertation analyzes these different levels through three separated, but interrelated, sections: 1) The Nigerian video industry has experienced a transnational success since its early stages. Thanks to the informality of Nollywood’s network of distribution, pirated copies of Nigerian videos have circulated throughout the world since the mid 90s. Informal and pirated networks of circulation made videos travel long distances and create for the industry a wide transnational audience. However, as this section argues, informal production and distribution strategies and their vulnerability to piracy progressively eroded the industry’s economy. This section then argues that, once the internal Nigerian video market has started to implode because of the excess of informality and the lack of a proper distribution framework, an important section of the industry has explicitly decided to target the transnational audience generated by the global informal circulation of Nigerian video films. New modes of production and circulation emerged, which mainly target local elites and diasporic audiences. A new wave of high budget productions saw the light. The videos’ patterns of mobility transformed and, this impacted on video films’ economic accessibility for local popular audiences. 2) The second section analyzes the way videos’ discursive circulation (that is, the way in which videos, and the video phenomenon in general, have been portrayed, discussed and analyzed both in Nigeria and elsewhere) impacted on the video industry’s transformation. As with the material and economic circulation analyzed in the first section, videos’ discursive circulation interacted with the video phenomenon in at least two ways. On the one hand it made videos travel. It made them cross boundaries and reach audiences they did not even envisaged to reach. On the other hand, it opened for the video industry a field of dynamic confrontation. Nollywood has been compared to other global film industries (such as Bollywood and Hollywood), and it has been criticized for its low production quality standards. The video phenomenon has been celebrated for some of its achievement, and mocked for some of its weaknesses. This complex interaction with the global cinema arena has produced numerous effects on the video industry. Videos entrepreneurs reacted to criticism and engaged into active processes of transformation aimed at making the video industry reach international production quality standards, and escape the marginal position within which much of the mentioned discursive constructions positioned it. 3) The third section looks at videos’ aesthetics and narrative structures. The transnational mobility of the videos impacted on them in multiple ways. On the one hand, as a result of the encounter of both transnational and local aesthetic and narrative aspects, videos developed a particular aesthetic and narrative openness which made them able to address dispersed audiences and reconstitute them into a pan-African public. Through their specific film language, contents, and forms of address videos activated a debate on what it means to be African today, and shaped it around the social, cultural and historic specificities of the post-colonial, post-Structural-Adjustment era in Nigeria and, more generally, in sub-Saharan Africa. On the other hand, mobility intervened in the reformulation of videos’ narrative and aesthetic patterns. The video phenomenon has been adopted and reinterpreted by Nigerian diaporic groups in Europe and elsewhere. The specific social and economic conditions associated with the experience of living in the diaspora interacted with the videos’ production strategies and defined particular narrative and aesthetic solutions. When the Nigerian video industry entered the production crisis diasporic production companies found themselves in the position of an avant-garde in what concerns the industry’s transnational expansion: they had already experimented with economic and aesthetic solutions that could open Nigerian productions to global audiences. As a result, they became the bridge able to connect the Nigerian video film industry to transnational, non-African audiences. [less ▲]

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See detailAutomated procedures in ISO17025 routine dioxin laboratory: impact on throughput
Focant, Jean-François ULg

Scientific conference (2012, April)

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See detailHave STS Fallen Into a Political Void? Depoliticisation and Engagement in the Case of Nanotechnologies
Thoreau, François ULg; Delvenne, Pierre ULg

in Política & Sociedade (2012), 11(20), 205-226

In this paper we trace some of the key points in the history of Science and Technology Studies (STS). In particular we outline the inherently political dynamics of the field. Against We underline two ... [more ▼]

In this paper we trace some of the key points in the history of Science and Technology Studies (STS). In particular we outline the inherently political dynamics of the field. Against We underline two emerging patterns in the curse of STS: the one of “depoliticisation” and the one of increasing “engagement”. We address the case study nanotechnologies and discuss their intertwined history with the STS. This allows us to point at the risk that the increasing institutionalisation of STS and the political mandate that frames and stabilizes the field’s relationship to the technological developments would create a political void. We conclude that STS research is at a crossroads. It is facing an important empirical turn, which may deprive it from its political significance, and constantly redefine its institutional constraints. STS has to continuously question its underlying political assumptions (as it occurs more and more regarding public participation) and to make it explicit. [less ▲]

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See detailVers une plus grande intégration des outils de conception?
Habran, Maxime ULg

in Revue de la Faculté de Droit de l'Université de Liège (2012)

Mise en évidence des principes relatifs à deux outils de conception, le schéma de développement de l'espace communautaire (SDEC) et le schéma de développement de l'espace régional (SDER)

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See detailLe vote obligatoire
Reuchamps, Min ULg; Caluwaerts, Didier; Bouhon, Frédéric ULg

in Bouhon, Frédéric; Reuchamps, Min (Eds.) Les systèmes électoraux de la Belgique (2012)

S’il est un élément précoce de la socialisation politique des jeunes Belges, c’est la connaissance de l’obligation de voter dans ce pays. Peu de Belges ignorent, en effet, que le vote y est obligatoire et ... [more ▼]

S’il est un élément précoce de la socialisation politique des jeunes Belges, c’est la connaissance de l’obligation de voter dans ce pays. Peu de Belges ignorent, en effet, que le vote y est obligatoire et donc qu’une obligation de se rendre aux urnes, sous peine de sanctions – généralement peu ou mal connues –, incombe à chaque électeur du Royaume, même si dans les faits tous ne participent au scrutin. Pourtant, le vote obligatoire n’est pas une caractéristique commune des systèmes électoraux à travers le monde. À ce jour, on ne retrouve une telle obligation, assortie ou non de sanction, que dans trente et un États ou partie d’État. La Belgique fut précurseur en la matière et, même si ce pays ne s’est pas détourné du vote obligatoire en plus de cent ans d’existence, cette obligation continue de susciter un véritable débat. Dans la première partie de ce chapitre, nous revenons sur l’introduction du vote obligatoire en Belgique en présentant les arguments de ce débat. La deuxième partie aborde les principes et les sanctions consacrés par le droit positif tandis que la troisième partie explore les conséquences politiques du vote obligatoire. Tout naturellement, la conclusion de ce chapitre se penchera sur son avenir en Belgique. [less ▲]

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See detailSalivary Glucose Oxidase from Caterpillars Mediates the Induction of Rapid and Delayed-Induced Defenses in the Tomato Plant
Tian, Donglan; Peiffer, Michelle; Shoemaker, Erica et al

in PLoS ONE (2012), 7(4), 36168

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See detailQuerelles d’écrivains (XIXe-XXIe siècles) : de la dispute à la polémique, dans COnTEXTES, revue de sociologie de la littérature
Stienon, Valérie ULg; Groupe de contact FNRS Contextes en sociologie de la littérature

Book published by Université de Liège (2012)

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See detailhe influence of transformational leadership on commitment: New underlying processes
Marique, Géraldine; Stinglhamber, Florence; Hanin, Dorothée et al

Poster (2012, April)

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See detailLa globalisation : cinq thèses et trois scénarios
Jacquemain, Marc ULg

Conference (2012, April)

La communication reprend l'idée de Zaki Laïdi, selon laquelle au-delà de l'accélération des flux économiques, la globalisation doit être considérée comme un transformation des représentations du monde. Il ... [more ▼]

La communication reprend l'idée de Zaki Laïdi, selon laquelle au-delà de l'accélération des flux économiques, la globalisation doit être considérée comme un transformation des représentations du monde. Il propos d'apppliquer cette logique à quelques grands travaux sociologiques récents sur la globalisation et montrer comment ces travaux eux-mêmes contribuent à faconner des "imaginaires" au sens de Zaki Laïdi [less ▲]

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See detailThe oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching
Gérard, Jean-Claude ULg; Soret, Lauriane ULg; Migliorini, Alessandra et al

Conference (2012, April)

The oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching J.-C. Gérard (1), L. Soret (1), A. Migliorini (2), G. Piccioni (2), and P. Drossart (3) (1) LPAP ... [more ▼]

The oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching J.-C. Gérard (1), L. Soret (1), A. Migliorini (2), G. Piccioni (2), and P. Drossart (3) (1) LPAP - Université de Liège - Belgium (jc.gerard@ulg.ac.be, 0032 4 366 9711), (2) INAF - Rome, Italy, (3) LESIA, Observatoire de Paris - Meudon, France Three-body recombination of atomic oxygen produces O2 molecules excited in different electronic states such as a 1∆g, b 1 􏰀+g , A 3 􏰀+u , c 1 􏰀uand A’ 3∆u, each with a specific quantum efficiency. When they radiate, optical transitions are observed in a wide range of wavelengths extending from the ultraviolet to the near infrared. In planetary atmospheres, spontaneous radiative deexcitation compete with collisional quenching with ambient molecules and atoms. As a consequence, the corresponding airglow emission profiles may significantly differ from each other in brightness and altitude of the emitting layer. We model the volume emission rates and limb profiles of the O2 Atmospheric Infrared (a 1∆-X 3 􏰀), Herzberg I (A 3 􏰀-X 3 􏰀), Herzberg II (c 1 􏰀-X 3 􏰀), Chamberlain (A’ 3∆-a 1∆) bands expected on the Venus night side. The quenching rates are taken from laboratory and observational planetary data and we apply two different methods to determine the oxygen and CO2 density profiles. One is based on recent analysis of data collected by instruments on board the Venus Express mission. The second one uses a one-dimensional chemical-diffusive model where the free parameters are the strength of turbulent transport and the downward flux of O atoms. Both approaches indicate that the calculated intensities of each transition range over several orders of magnitude and that differences are expected in the altitude of the maximum emission. These predictions will be compared with VIRTIS/Venus Express limb observations, which make it possible to derive the vertical distribution of the O2 emissions in the visible and infrared. These measurements suggest that no difference is observed between the altitude of the peak of the IR Atmospheric and Herzberg II bands. Conclusions will be drawn about the validity of the current set of quenching coefficients used in the model. [less ▲]

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See detailLa fréquence des élections
Bouhon, Frédéric ULg

in Bouhon, Frédéric; Reuchamps, Min (Eds.) Les systèmes électoraux de la Belgique (2012)

Ce chapitre vise à présenter les règles juridiques qui déterminent le rythme électoral. Il commence par une courte discussion sur la question de savoir quel laps de temps peut être considéré comme une ... [more ▼]

Ce chapitre vise à présenter les règles juridiques qui déterminent le rythme électoral. Il commence par une courte discussion sur la question de savoir quel laps de temps peut être considéré comme une durée raisonnable pour une législature. Il se poursuit par le passage en revue les normes qui établissent, pour chacune des assemblées élues du pays, la durée qui sépare en principe deux élections , et par l'examen des cas où la législature est écourtée par l’organisation d’élections anticipées. Enfin, le chapitre s'achève par une brève réflexion sur l’opportunité d’une synchronisation des différentes échéances électorales. [less ▲]

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See detailGiacomo Casanova: Histoire de ma vie, extraits. Divers extraits de livre. Traductions effectuées pour la mise en scène de "Casanova, Theater mit Figuren"
Casanova, Giacomo; Flem, Lydia; Le Bitouzé, Corinne et al

Article for general public (2012)

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See detailLong-term magnetic field monitoring of the Sun-like star \xi Bootis A
Morgenthaler, A.; Petit, P.; Saar, S. et al

in Astronomy and Astrophysics (2012), 540

Aims: We aim to investigate the long-term temporal evolution of the magnetic field of the solar-type star ξ Bootis A, both from direct magnetic field measurements and from the simultaneous estimate of ... [more ▼]

Aims: We aim to investigate the long-term temporal evolution of the magnetic field of the solar-type star ξ Bootis A, both from direct magnetic field measurements and from the simultaneous estimate of indirect activity indicators. Methods: We obtained seven epochs of high-resolution, circularly-polarized spectra from the NARVAL spectropolarimeter between 2007 and 2011, for a total of 76 spectra. Using approximately 6100 photospheric spectral lines covering the visible domain, we employed a cross-correlation procedure to compute a mean polarized line profile from each spectrum. The large-scale photospheric magnetic field of the star was then modelled by means of Zeeman-Doppler Imaging, allowing us to follow the year-to-year evolution of the reconstructed magnetic topology. Simultaneously, we monitored the width of several magnetically sensitive spectral lines, the radial velocity, the line asymmetry of intensity line profiles, and the chromospheric emission in the cores of the Ca II H and Hα lines. Results: During the highest observed activity states, in 2007 and 2011, the large-scale field of ξ Bootis A is almost completely axisymmetric and is dominated by its toroidal component. The toroidal component persists with a constant polarity, containing a significant fraction of the magnetic energy of the large-scale surface field through all observing epochs. The magnetic topologies reconstructed for these activity maxima are very similar, suggesting a form of short cyclicity in the large-scale field distribution. The mean unsigned large-scale magnetic flux derived from the magnetic maps varies by a factor of about 2 between the lowest and highest observed magnetic states. The chromospheric flux is less affected and varies by a factor of 1.2. Correlated temporal evolution, due to both rotational modulation and seasonal variability, is observed between the Ca II emission, the Hα emission and the width of magnetically sensitive lines. The rotational dependence of polarimetric magnetic measurements displays a weak correlation with other activity proxies, presumably due to the different spatial scales and centre-to-limb darkening associated with polarimetric signatures, as compared to non-polarized activity indicators. Better agreement is observed on the longer term. When measurable, the differential rotation reveals a strong latitudinal shear in excess of 0.2 rad d-1. [less ▲]

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See detailBiological variations during a race cycling
LE GOFF, Caroline ULg; Kaux, Jean-François ULg; Goffaux, Sébastien et al

in Biomedica 2012 (2012, April)

Background: The metabolic and cardiac impact of a cycling effort on blood biology is not very well described in the literature. We aimed to measure the concentration of different biomarkers (cardiac and ... [more ▼]

Background: The metabolic and cardiac impact of a cycling effort on blood biology is not very well described in the literature. We aimed to measure the concentration of different biomarkers (cardiac and metabolic) released during an international cycling race. Materials and Methods: Venous blood samples of 15 young men (25.1 ± 6.4 y.o.) were collected just before (T1), just after (T2), 3 hours (T3) after an international cycling race of 176 kilometers in Belgium for the determination of cardiac and metabolic biomarkers: red blood cells (RBC) haemoglobin (HgB) creatinin (Cr) highly sensitive troponin T (hsTnT) myoglobin (MYO) NT-proBNP All automated assays were performed according to the manufacter’s specifications. For the statistical analysis, an Anova calculated with the Statistica Software version 9.1 was used. Results: •RBC and HgB levels varied significantly between T0 and T3 (respectively p=0.0026, and p=0.002) (Fig. 1 and 2). • Cr concentration also varied significantly between all times (T0-T1:p<0.0001, T1-T3:p=0.0326 and T0-T3 p=0.0001)(Fig.3). These changes might be related to renal flow depletion during exercise. •MYO increased significantly between T0 and T1 (p<0.0001), but quickly decreased between T1 and T3, however the T3 level stay higher than T0 (p=0.014) (Fig.4). •The stress delivered from the physical activity performed during the race induced a significant variation of hsTnT which increased significantly between T0 and T1 (p<0.0001) and stayed higher 3 hours after the end of the exercise (T0-T3: p<0.0001) (Fig.5) . •The intense exercise delivery by the race induced a significant variation of NT-proBNP, that followed the same kinetic of hsTnT but in smaller proportion. We noticed variations statistically significant between T0 and T1 and between T0 and T3 for NT-proBNP (Fig.6). •These increases of cardiac biomarkers were significant but reasonable and could not allow us to talk about cellular necrosis or irreversible injury. Conclusions: Our results show that stress generated by a cycling race could be the cause for the different metabolic variations observed. Troponin T stays without a doubt the most specific marker for stress related to myocardial tissue. Its increase can then be considered as being of interest. [less ▲]

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See detailHigher-Moment Risk Exposures in Hedge Funds
Lambert, Marie ULg; Hübner, Georges ULg; Papageorgiou, Nicolas

Conference (2012, April)

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model ... [more ▼]

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model with location, trading and higher-moment factors in order to describe the dynamics of the Equity Hedge (Market Neutral, Short Selling and Long/Short strategies), Event Driven, Relative Value, and Funds of Hedge Funds styles. The volatility, skewness and kurtosis implied in the US options markets are used by Hedge Fund managers as instruments to anticipate market movements. Managers should adjust their market exposure in response to variations in the implied higher moments. We show that higher-moment premia improve a conditional asset pricing model both in terms of explanatory power (R-squares and Schwarz criterion) and specification errors across all Hedge Fund styles. [less ▲]

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See detailPrediction of the cross-section capacity of hot-rolled profiles using the direct strength method and the continuous strength method
Li, Yongzhen ULg; Rossi, Barbara ULg

in Chan, S.L.; Shu, G.P. (Eds.) Proceedings of seventh International Conference on Advances in Steel Structures (2012, April)

Material yielding on one hand and local buckling on the other hand limit the cross-section capacity of steel structural members. Current structural design codes use the concept of cross-section ... [more ▼]

Material yielding on one hand and local buckling on the other hand limit the cross-section capacity of steel structural members. Current structural design codes use the concept of cross-section classification to determine the cross-section resistance of hot-rolled profiles. In this system, the Effective Width Method (EWM) is employed to account for local buckling effects for slender, class 4, cross-sections. Alternative design methods for treatment of local buckling in metallic cross-sections have been proposed, including the Direct Strength Method (DSM), developed for cold-formed steel structural profiles, and, recently, the Continuous Strength Method (CSM). The DSM is based on the assumption that the strength can be predicted from the ratio of the yield strength to the elastic critical load in conjunction with a strength curve for the entire cross-section. Thus it is essentially an extension of the use of column curves for global buckling, but with application to local buckling instability. The CSM is a deformation-based design approach which is based on a continuous relationship between cross-sectional slenderness and cross-section deformation capacity and a rational exploitation of strain hardening. This paper is focused on the evaluation of the cross-sectional resistance of hot-rolled structural profiles. Test data from literature experimental programmes have been gathered and analysed to compare the predictions from the DSM and CSM design approaches. [less ▲]

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