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See detailClimate-proofing of large reservoirs in Belgium by the development of enhanced operation rules
Bruwier, Martin ULg; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

in 3rd IAHR Europe Congress (2014)

Available climate change scenarios project drier summers and more humid winters for Belgium. This study addresses the impacts of those changes on the management of two multi-purpose reservoirs located in ... [more ▼]

Available climate change scenarios project drier summers and more humid winters for Belgium. This study addresses the impacts of those changes on the management of two multi-purpose reservoirs located in the Vesdre basin, and the search of enhanced operation rules to mitigate those changes. For this purpose, an integrated model is used, including a hydrological model of the Vesdre watershed, a hydraulic model of this river, a model of the dam complex operation rules and a flood risk model. Performance indicators of the dams are defined, representing drinking water production, damages due to floods, hydropower production and low-flow enrichment. First, a sensitivity analysis of the main parameters of the dam operation rules on the performance indicators is achieved. Afterwards, for two extreme climate scenarios at the time horizons 2021-2050 and 2071-2100, impacts of climate change on the reservoir performances are determined. Then, the results of the sensitivity analysis are used to indicate if climate change impacts may be mitigated by means of enhanced operation rules. [less ▲]

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See detailDu texte littéraire au document : les connexions entre les papyrus littéraires et documentaires grecs et latins
Marganne, Marie-Hélène ULg

in Derda, Tomasz; Urbanik, Jakub (Eds.) Actes du XXVIIe Congrès International de papyrologie (Varsovie, 29.07-03.08.2013) (2014)

Si l'on distingue généralement les papyrus littéraires et les papyrus documentaires grecs et latins, ces deux catégories présentent cependant, à côté du support, de l'écriture et des scribes, d'autres ... [more ▼]

Si l'on distingue généralement les papyrus littéraires et les papyrus documentaires grecs et latins, ces deux catégories présentent cependant, à côté du support, de l'écriture et des scribes, d'autres caractéristiques communes : certains papyrus paralittéraires présentent des traits documentaires ; d'autres papyrus sont trop fragmentaires pour être sûrement identifiés, soit comme littéraires, soit comme documentaires ; certains écrits comme les lettres et les discours peuvent, soit être liés à une profession ou à une circonstance particulière (documents), soit être fictifs (littéraires) ; des papyrus documentaires contiennent des citations ou des réminiscences littéraires ; des papyrus littéraires présentent un document sur l'autre face ; des papyrus littéraires font partie d'archives documentaires . Appliquant aux textes documentaires ou indéterminés la même grille d'analyse qu'aux textes littéraires, la nouvelle base de données du CEDOPAL permet de rendre compte de ces connexions et de les exploiter en vue de mieux évaluer les écrits concernés, les méthodes scribales mises en œuvre, ainsi que leur contexte de production et d'utilisation. [less ▲]

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See detailManagement of Environmental Security Through Organic Agriculture. Contribution of Consumer Behavior
Petrescu, Dacinia Crina; Petrescu-Mag, Ruxandra Malina; Burny, Philippe ULg

in Ozunu, Alexandru (Ed.) The 10th Elsedima International Conference : Book of abstracts “Environmental Legislation, Safety Engineering and Disaster Management”, September 18th-19th, 2014, Cluj-Napoca, Romania : 10th Anniversary (2014)

The paper examines and argues why environmental issues are matters of security, offering conceptual clarifications upon "environmental security". The range of issues considered as "environmental security ... [more ▼]

The paper examines and argues why environmental issues are matters of security, offering conceptual clarifications upon "environmental security". The range of issues considered as "environmental security" subjects are numerous and diverse and one of these is related to food. Food production, storage, distribution and quality have always been linked to environ mental conditions. Food security through organic agriculture contributes to environ mental security. Scientists often point to three factors as responsible for environ mental state - population, technology, and consumption, but consumption seems to get the least attention. We studiad consumer behaviour as source of positive and negative consequences with impact on environmental security. The study case presents the results of a survey targeted on organic food consumers from NW Romania. We found that 73% of subjects believe that organic food helps protecting the environ ment more than conventional food and 60% believe that animal organic food comes from animais that had better life (than conventional ones). We found a statistically significant difference between people who believe humanity faces natural environ ment problems which are very threatening and those who do not concerning the strength of beliefs that organic food helps protecting the environment more than conventional food (p<O.05). We observed a direct, strong relationship between the strength of beliefs that organic food has capacity to preserve existence of traditional products and strength of beliefs that organic food has the capacity to protect natural environ ment [r=.506, p=.OOO]. The paper defends the idea that consumers' beliefs such as those related to nature protection or animal welfare through organic food are valuable instruments that help to strengthen the environ mental security. [less ▲]

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See detailLe miroitement des mots
Verbeeck, Muriel ULg; Buyle, Marjan

in Buyle, Marjan (Ed.) Lustre et brillance en conservation-restauration - Glans in de conservait-restauratie (2014)

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See detailAnalysis of mass movements affecting the region of Constantine
Draidia, Salah ULg; Havenith, Hans-Balder ULg; Benabbas, C.

in EGU General Assembly Conference Abstracts (2014)

Abstract: Mass movements are a very frequent phenomenon in the North-Eastern Algeria, causing a lot of damages among the population and on the infrastructures and representing the most important geohazard ... [more ▼]

Abstract: Mass movements are a very frequent phenomenon in the North-Eastern Algeria, causing a lot of damages among the population and on the infrastructures and representing the most important geohazard. This paper presents some results of the analysis of slope instabilities in many places in the region and especially along the East-West highway. The work show many types of failures characterized by a high degree of heterogeneity. It is clear that the landslides in this area are very complex, in the most cases a combination of ... [less ▲]

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See detailImages de guerre dans quelques passions donatistes africaines
Fialon, Sabine ULg

in Coltellonoi-Trannoy; Le Bohec, Yann (Eds.) La guerre dans l'Afrique romaine sous le Haut-Empire (2014)

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See detailLes dieux et la cité. Représentations des divinités tutélaires entre Grèce et Phénicie
Bonnet, Corinne; Pirenne-Delforge, Vinciane ULg

in Zenzen, Nicolas; Hölscher, Tonio; Trampedach, Kai (Eds.) Aneignung und Abgrenzung. Wechselnde Perspektiven auf die Antithese von ‘Ost’ und ‘West’ in der griechischen Antike (2014)

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See detailRéalisation d’un inventaire typologique et dendrochronologique des charpentes anciennes en région Bruxelles-Capitale
Weitz, Armelle ULg; Charruadas, Paulo ULg; Crémer, Sarah et al

in Chronique, Archaeologia Mediaevalis 37, Namur, 13-14 mars 2014 (2014)

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See detailSaharan dust: An under-studied but significant source of air pollution in West Africa
Ozer, Pierre ULg; De Longueville, Florence ULg

in Belviso, Claudia; Fiore, Saverio; Giannossi, Maria Luigia (Eds.) DUST2014 - International Conference on Atmospheric Dust _ Book of Abstracts (2014)

Recently, the World Health Organization’s International Association for Research on Cancer (IARC) classified outdoor air pollution as carcinogenic to humans and now puts air pollution in the same category ... [more ▼]

Recently, the World Health Organization’s International Association for Research on Cancer (IARC) classified outdoor air pollution as carcinogenic to humans and now puts air pollution in the same category as tobacco smoke, UV radiation and plutonium. Exposure to ambient fine particles was recently estimated to have contributed 3.2 million premature deaths worldwide in 2010. The ambient air across the globe is polluted by emissions from motor vehicles, industrial processes, power generation, household combustion of solid fuel, and other sources. Dust storms lead to particulate levels that exceed internationally recommended levels especially in West Africa but this source of air pollution is under-studied, particularly in the literature devoted to human health impacts. [less ▲]

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See detailPourquoi la théorie de la connaissance a besoin de la psychologie: les arguments de Stumpf
Dewalque, Arnaud ULg

in Gyemant, Maria (Ed.) Psychologie et psychologisme (2014)

Mon objectif est double. Il s’agira, d’une part, de retracer la position de Carl Stumpf face à la querelle du psychologisme (lectures psychologistes de Kant vs lectures antipsychologistes néokantiennes ... [more ▼]

Mon objectif est double. Il s’agira, d’une part, de retracer la position de Carl Stumpf face à la querelle du psychologisme (lectures psychologistes de Kant vs lectures antipsychologistes néokantiennes) et, d’autre part, d’en tirer quelques implications d’allure très générale concernant la place qu’il convient de réserver aux considérations psychologiques en philosophie. Je suggérerai: (1) que Stumpf adopte une voie médiane entre psychologisme et antipsychologisme, (2) que cette voie médiane est représentative de l'orientation philosophique de Brentano et de son école, (3) qu'elle débouche sur une conception fine des rapports entre philosophie (en particulier théorie de la connaissance) et psychologie: la théorie de la connaissance a besoin de la psychologie, sans être à proprement parler "fondée" sur elle. [less ▲]

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See detailEarly Jezirah 3b Pottery from Tell Beydar, Selected Inventories from latest excavation campaigns
Mas, Juliette ULg; Gavagnin, Katia

in Bieliński, P.; et al. (Eds.) Proceedings of the 8th International Congress on the Archaeology of the Ancient Near East, 30 April – 4 May 2012, University of Warsaw, Volume 2: Excavation and Progress Reports, Posters (2014)

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and ... [more ▼]

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and the architecture of the city as well as its material culture, especially the pottery. The assemblages presented in this paper were exclusively found directly on the floors of various buildings (of a public, domestic, religious, offi- cial nature) and inside a grave. Most of these inventories consist of complete vessels discovered either intact or smashed but restorable. The aim of this paper is to investigate if, or to what extent, the intra-site distribution of the morphological repertoire of Beydar IIIb ceramic is related to its context of use. [less ▲]

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See detailInvestigation of pregnancy-associated glycoproteins (PAGs) by means of an enzymoimunoassay (ELISA) sandwich kit for pregnancy monitoring in sheep
El Amiri, Bouchra; Delahaut, Philippe; Colemans, Yves et al

in Chentouf, M; López-Francos, A; Bengoumi, M (Eds.) et al Options méditerranéennes : Series A (2014)

The aim of the present study was to investigate the use of a PAGs ELISA-Sandwich kit (Ret. code E.G.7. CER. Marloie, Belgium) for both early pregnancy diagnosis (in Sardi sheep) and the pregnancy follow ... [more ▼]

The aim of the present study was to investigate the use of a PAGs ELISA-Sandwich kit (Ret. code E.G.7. CER. Marloie, Belgium) for both early pregnancy diagnosis (in Sardi sheep) and the pregnancy follow up (in Boujaâd and Boujaâd x D'man sheep). ln Sardi breed, plasma samples were obtained from pregnant ewes (n = 17) from day 18 to 30 of gestation at 2 days interval. ln Boujaâd (n = 8) and Boujaâd x D'man (n = 20) the blood samples were weekly collected from the first week of gestation till the 4th week after lambing. The PAG concentrations were determined by a sandwich-ELISA based on purified bovine PAG (boPAG-67 kDa) as a standard, the antiserum raised against caprine PAG (caPAG-55+62 kDa) as a capture antibody (1/40000) and antiserum raised against purified PAG from buffalo (AS 859) as detection antibody (1/32 000). The Avidin-HRP and TMB were used to reveal reactions. Ewes were assumed to be pregnant when PAG concentrations were higher than 0.8 ng/ml. Results showed that in Sardi sheep it is possible to detect ail ewes as pregnant as early as on 24 days of gestation. ln Boujaâd and Boujaâd x D'man the PAG concentrations reached the higher values just before lambing. This value is higher in ewes carrying more than one lamb than in those carrying a single lamb. To conclude, the present study shows that the ELISA kit used for early pregnancy diagnosis in sheep as weil as for pregnancy fellow up could be a good alternative to the radioimmunoassay RIA in countries where this last technique is hard to set up. [less ▲]

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See detaileLearning COLEACP : un dispositif de formation au service des professionnels du secteur agricole en Afrique
Prunier, Emmanuelle; Le Hung, Florian; Schiffers, Bruno ULg

in ELearning Africa 2014 - Book of Abstracts (2014)

Le dispositif de formation à distance du COLEACP (Comité de Liaison Europe-Afrique-Caraïbes-Pacifique) est une composante d'un système complet de formation dédié au renforcement des capacités des ... [more ▼]

Le dispositif de formation à distance du COLEACP (Comité de Liaison Europe-Afrique-Caraïbes-Pacifique) est une composante d'un système complet de formation dédié au renforcement des capacités des opérateurs des filières agricoles des pays ACP (Afrique Caraïbes et Pacifique). [less ▲]

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See detailStratigraphy and depositionnal settings of the Late Famennian of Southern Belgium - a snapshot of the palaeoenvironment for late Devonian tetrapods and arthropods
Denayer, Julien ULg; Prestianni, Cyrille; Olive, Sébastien et al

in 4th International Palaeontological Congress, Mendoza, Abstracts volume (2014)

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See detailPerturbation methods for the determination of the statistical response of nonlinear Volterra systems
Denoël, Vincent ULg; Carassale, Luigi

in Proceedings of the Eurodyn 2014 Conference (2014)

The point-like quasi-steady aerodynamic loading in a turbulent flow is formally expressed as a function of the squared relative velocity between the fluid and the investigated structure. The three major ... [more ▼]

The point-like quasi-steady aerodynamic loading in a turbulent flow is formally expressed as a function of the squared relative velocity between the fluid and the investigated structure. The three major terms governing the low-order statistics of the response are known to be related to the average loading, the linear turbulent loading and the aerodynamic damping. The three other terms in the loading, namely the quadratic turbulence term, the parametric velocity feedback term and the squared velocity term, may significantly affect the higher order statistical cumulants of the response. These latter two sources of fluid-structure interaction are usually disregarded, by lack of efficient simulation tools, except a Monte Carlo simulation of the nonlinear equation. In this paper, we provide a formal analysis of the complete nonlinear model, including thus all six terms, but mainly focusing on the importance of the two nonlinear coupling terms of the loading. Closed form solutions of the response are derived for a second-order Volterra model of this problem, under the assumption of different timescales in the loading and in the structural behavior. Two major outcomes of the analysis are, on the one hand, that the squared structural velocity term has no influence on the cumulants of the response up to order 4 and, on the other hand, that the parametric velocity feedback acts as a reduction of the non Gaussianity of the response. [less ▲]

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See detailAvailable technical flexibility for balancing variable renewable energy sources: case study in Belgium
Quoilin, Sylvain ULg; Gonzalez Vazquez, Ignacio; Zucker, Andreas et al

in Proceedings of the 9th Conference on Sustainable Development of Energy, Water and Environment Systems (2014)

The recent evolution in power systems, including increased share of renewables and a modification of the power plant fleets entail new constraints, e.g. on the peak capacity or on the technical ... [more ▼]

The recent evolution in power systems, including increased share of renewables and a modification of the power plant fleets entail new constraints, e.g. on the peak capacity or on the technical flexibility required on the grid. This study simulates the Belgian power system using Dispa-SET, a unit commitment and optimal dispatch model developed within the Joint Research Centre. Different “what-if” scenarios are defined and evaluated by varying the availability of major nuclear and CCGT power plants, or the share of renewable capacity in the system. Key findings include: If the nuclear power plants of Doel 1, 2 and 4 had not been available in 2012-2013, 76 hours of capacity deficit would have been stated. If, in addition, the two CCGT power plants of Vilvoorde and Seraing had been disconnected, the number of deficit hours would have risen to 450. There is enough technical flexibility on the system to accommodate significant shares of renewable energy (up to 8 GW additional capacity, corresponding to 17% of the yearly generation). CCGT power plants are submitted to more on/off cycles as the share of renewable energy increases. In high renewable penetration scenarios, CCGT power plant are committed preferably over less flexible nuclear or coal power plants. It is therefore necessary to set up proper markets mechanisms to maintain these plants on the grid. [less ▲]

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See detailComment les futurs enseignants du secondaire conçoivent-ils l’évaluation formative et ses difficultés de mise en œuvre ?
Goffin, Christelle ULg; Renson, Jean-Marie ULg; Fagnant, Annick ULg

in Actes du colloque : Cultures et politiques de l’évaluation en éducation et en formation. (2014)

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See detailA LARGE STRAIN ELASTO-VISCOPLASTIC NUMERICAL MODEL
Careglio, Claudio; Canales Cardenas, Cristian ULg; Ribero, Melisa et al

in Bustamante, Roger (Ed.) Proceedings of PACAM XIV (2014)

A large strain elasto-viscoplastic Perzyna model was proposed by Ponthot. The resultant numerical model computes the elastic response using an hypoelastic model. A viscoplastic multiplier was proposed ... [more ▼]

A large strain elasto-viscoplastic Perzyna model was proposed by Ponthot. The resultant numerical model computes the elastic response using an hypoelastic model. A viscoplastic multiplier was proposed, then both inviscid (elastoplastic) and elastic limiting cases can be easily recovered. More recently the authors have included this viscoplastic model in a large strain constitutive model based on hyperelasticity and multiplicative decomposition of deformation gradient tensor. In this work a brief summary of both, hypoelastic and hyperelastic based large strain models of viscoplasticity is provided. Large strain examples are simulated in order to test the discussed models. Different parameters of the constitutive model are tested in order to study the sensitivity of the resultant algorithm. From the obtained results can be said that both models show a very good agree and represent very well the characteristic of the viscoplastic constitutive model. [less ▲]

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See detailExperimental Study of the Human Ability to Deliberately Excite a Flexible Floor
Schwartz, Cédric ULg; Berger, Alexis; Bruls, Olivier ULg et al

in Zingoni, Alphose (Ed.) Proceedings of the 5th International Conference on Structural Engineering, Mechanics and Computation (2014)

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better ... [more ▼]

Human-structure interactions are not completely understood yet. This paper presents an experimental study focusing on the interaction between a human and a flexible support, with a major aim to better understand how the behavior of a human subject, bouncing on a flexible structure, adapts to the support motion. Exploratory experiments are undertaken with a 7m-span timber footbridge tested in the Human Motion Analysis Laboratory of the University of Liege. The movements of the coupled system composed of the subject and the footbridge are recorded by Motion Capture technology; the subject\textquoteright{}s 3-D body motion is defined by three important angles: ankle, knee and hip. The interaction between the subject and the footbridge is also quantified by means of force platform measurements. The experiments indicate an influence of the support amplitude and natural frequency on the phase shift between the oscillatory floor motion and the three angles characterizing the motion. [less ▲]

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See detailDemisso capite : Ablatif absolu ou épithète détachée ?
Longrée, Dominique ULg

in Lehmann, Christian; Concepcion, Cabrillana L. (Eds.) Acta XIV Colloquii Internationalis Linguisticae Latinae (2014)

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See detailImportance of structural damping in the dynamic analysis of compliant deployable structures
Dewalque, Florence ULg; Rochus, Pierre ULg; Bruls, Olivier ULg

in Proceedings of the 65th International Astronautical Congress (IAC) (2014)

Compliant mechanisms such as tape springs are often used on satellites to deploy appendices, e.g. solar panels, antennas, telescopes and solar sails. Their main advantage comes from the fact that their ... [more ▼]

Compliant mechanisms such as tape springs are often used on satellites to deploy appendices, e.g. solar panels, antennas, telescopes and solar sails. Their main advantage comes from the fact that their motion results from the elastic deformation of structural components, unlike usual hinges or prismatic joints, the motion of which is dictated by contact surfaces. No actuators or external energy sources are required and the deployment is purely passive, which appears as a decisive feature for the design of low-cost missions with small satellites or cubesats. The mechanical behaviour of a tape spring is intrinsically complex and nonlinear involving buckling, hysteresis and self-locking phenomena. High-fidelity mechanical models are then needed to get a detailed understanding of the deployment process, improve the design and predict the actual behaviour in the space 0-g environment. In the majority of the previous works, dynamic simulations were performed without any physical representation of the structural damping. These simulations could be successfully achieved because of the presence of numerical damping in the transient solver. However, in this case, the dynamic response turns out to be quite sensitive to the amount of numerical dissipation, so that the predictive capabilities of the model are questionable. In this work based on numerical case studies, we show that the dynamic simulation of a tape spring can be made less sensitive to numerical parameters when the structural dissipation is taken into account. [less ▲]

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See detailTerqa Ceramic Culture during the 3rd Millennium BC. Material from 18th-26th Excavation Campaigns
Mas, Juliette ULg

in Bieliński, P.; et al. (Eds.) Proceedings of the 8th International Congress on the Archaeology of the Ancient Near East, 30 April – 4 May 2012, University of Warsaw, Volume 2: Excavation and Progress Reports, Posters (2014)

Terqa, an important Syrian Bronze Age site located in the Lower Middle-Euphrates region, benefited from a key position which provided the settlement with the opportunity to gain from exchanges and ... [more ▼]

Terqa, an important Syrian Bronze Age site located in the Lower Middle-Euphrates region, benefited from a key position which provided the settlement with the opportunity to gain from exchanges and innovations arriving from both the North and South, while developing its own identity and culture. A new study on pottery has just been carried out on 3rd-millennium material from eight excavation seasons. The recovered material has been used to specify Terqa’s chronostratigraphy with greater accuracy, comparing it with the neighboring site of Mari and other contemporary ones but also providing us with a preliminary overview of Terqa’s ceramic culture during the Early Bronze Age. [less ▲]

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See detailDe l'alimentation à la médecine : l'utilisation du vin dans les papyrus littéraires grecs et latins relatifs à la cuisine et à la médecine
Marganne, Marie-Hélène ULg

in de Haro Sanchez, Magali; Boudon-Millot, Véronique (Eds.) « Des grains et du vin dans l’Antiquité : entre aliments et médicaments ». Journée d’étude organisée le 17 mai 2013 à Paris, Maison de la Recherche (2014)

Unlike the Egyptians who produced and consumed wine and beer from the earliest times, the Greeks and Romans are known mainly as producers and drinkers of wine. This paper attempts to address the question ... [more ▼]

Unlike the Egyptians who produced and consumed wine and beer from the earliest times, the Greeks and Romans are known mainly as producers and drinkers of wine. This paper attempts to address the question of the use of wine in cooking and medical recipes on Greek and Latin literary papyri from Egypt (IV/III BC – VI/VII AD). Do these texts manifest a local influence through mentions of Egyptian wine or beer or do they refer only to Greek (after the conquest of Alexander the Great in 332 BC) and Italian (after the annexation to the Roman state in 30 BC) wines? Furthermore, this study lists the properties and functions ascribed to wine(s) in these writings. [less ▲]

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See detailCharacterization of Particle Damage and Surface Exposure of a Copper Ore Processed by Jaw Crusher, HPGR and Electro-dynamic Fragmentation
Da Fonseca Martins Gomes, Otavio ULg; Monteiro de Oliveira, Debora; Santos Sobral, Luis Gonzaga et al

in Carpenter, John; Bai, Chenguang; Hwang, Jiann-Yang (Eds.) Characterization of Minerals, Metals, and Materials 2014 (2014)

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See detailLe patron urbain, un facteur influençant l'impact de l'urbanisation sur les écosystèmes: les cas de Kisangani et de Lubumbashi (RDC)
Andre, Marie ULg; Mahy, Grégory ULg; Lejeune, Philippe ULg et al

in PACODEL (Ed.) Colloque international Territoires périurbains: développement, enjeux et perspectives dans les pays du sud (2013, December 19)

Les dynamiques et patrons paysagers de deux villes entre deux années (Kisangani entre 2002 et 2010 ; Lubumbashi entre 2002 et 2008, en République Démocratique du Congo) ont été étudiés afin d’évaluer leur ... [more ▼]

Les dynamiques et patrons paysagers de deux villes entre deux années (Kisangani entre 2002 et 2010 ; Lubumbashi entre 2002 et 2008, en République Démocratique du Congo) ont été étudiés afin d’évaluer leur influence sur l’impact de l’extension et/ou densification de ces villes, et plus particulièrement de leur zone périurbaine, sur leurs écosystèmes internes et périphériques. En effet, le patron paysager occupe une place fondamentale dans l’hypothèse centrale de l’écologie du paysage, appelée pattern-process paradigm puisqu’il influence les processus écologiques et inversement. Sa description et son analyse sont donc particulièrement importantes (Bogaert et al. 2004; Coulson et al. 1999). Les indices de composition, communément utilisés en écologie du paysage, décrivent entre autres le patron en quantifiant la présence et le nombre de taches issues des différentes classes du paysage (Alberti 2008). D’autre part, les villes ne cessant d'augmenter leur emprise sur les paysages dont elles font partie, l'étude des espaces qui les ceinturent, le phénomène de leur extension dans les régions rurales ainsi que les schémas conceptuels de leur morphologie et dynamique interne sont plus que jamais des sujets d'actualité (Bhatta et al., 2010; Borsdorf et al., 2002; De Blij, 1977; Gaston, 2010; Halleux, 2006). Paradoxalement, les scientifiques de différentes disciplines peinent à donner une définition, des caractéristiques et des limites acceptées par tous aux notions se rattachant aux différentes zones présentes dans le gradient urbain-rural. Cette étude se distingue des autres, généralement subjectives, par son approche quantifiée et objective. Pour chacune des deux villes, deux images SPOT 5 ont été classifiées sur base d’une approche orientée-objet (Definiens 2013). Ensuite, des indices de composition paysagère ont été évalués afin 1) d’identifier l’étendue de chaque zone (urbaine, périurbaine, rurale) au sein du gradient urbain-rural en utilisant les définitions de zones proposées par André et al. (sous presse), 2) de décrire ces différentes zones en quantifiant les caractéristiques morphologiques les plus couramment citées avant d’en borner les valeurs (André et al. 2012) et 3) de quantifier la dynamique des différentes zones au cours de la dernière décade. Ensuite, les similarités et différences entre ces villes ainsi que la pertinence et les faiblesses de la méthode ont été identifiées et discutées. Les résultats de cette étude ont pour ambition de contribuer à une meilleure compréhension et prise en compte du rôle du patron paysager dans la résistance potentielle des écosystèmes naturels à l’extension et/ou la densification d’une ville donnée. [less ▲]

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See detailEncres anciennes: utilisation non conventionnelle d'aliments
Bouchat, Isabelle; Wymeersch, Noémie; Bchir, Brahim ULg et al

in Septième symposium du GCNAS: Vendredi 6 décembre, Louvain-La-Neuve (2013, December 06)

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux ... [more ▼]

De tout temps l’homme utilise des pigments pour peindre. Il y a 27.000 ans déjà, près de Marseille, dans la grotte Cosquer, des fresques furent peintes par des hommes préhistoriques. Il existe deux grandes catégories de pigments et colorants: les naturels et les artificiels. La première catégories contient les pigments minéraux tels que les argiles (ocre jaune ou rouge, argile verte ou brune) mais aussi des pierres (lapis lazuli (bleu)) et les pigments organiques d’origine végétale (gaude (jaune)) ou d’origine animale (murex (pourpre). La deuxième catégorie contient les pigments et colorants artificiels issus de réactions chimiques (minium (orange)) ou bien des mi-végétaux, mi-minéraux comme les encres ferro-galliques classés dans les divers. Après avoir servi pendant plusieurs siècles, tous ces pigments ont été remplacés à la fin du XIXe par des colorants synthétiques issus de la pétrochimie, car ces derniers ont l'avantage de la reproductibilité constante des couleurs. Mais la fin programmée du pétrole suscite un regain d'intérêt pour les préparations naturelles. C'est donc très logiquement que notre laboratoire a décidé de s'intéresser au sujet et en particulier aux encres venant du jus de chou rouge et aux encres ferro-grenadiques en collaboration avec l'Abbaye de Villers-la-Ville. [less ▲]

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See detailEvaluation de la Teneur Sanguine en Sélénium dans le Sang des Vaches en Wallonie (Belgique)
Mehdi, Youcef ULg; Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg et al

in 20ième Rencontre Recherches Ruminants (2013, December 04)

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See detailBrèves considérations sur le budget général des dépenses de l'autorité fédérale
Behrendt, Christian ULg

in Uyttendaele, Marc; Sautois, Joëlle (Eds.) La sixième réforme de l'Etat (2012-2013) : Tournant historique ou soubresaut ordinaire ? (2013, December 01)

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See detailDifferential Seismic Modeling of Stars
Ozel, N.; Mosser, B.; Dupret, Marc-Antoine ULg et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

CoRoT (Convection Rotation and planetary Transits) observations provide the opportunity to study a large sample of stars ranging from the Main Sequence (MS) to the Red Giant Branch. With the large ... [more ▼]

CoRoT (Convection Rotation and planetary Transits) observations provide the opportunity to study a large sample of stars ranging from the Main Sequence (MS) to the Red Giant Branch. With the large increase in the number of stars showing solar-like oscillations, we intend to extract as much information as possible from a low signal-to-noise ratio (SNR) oscillation spectrum, benefiting from comparison with a reference star having similar seismic and fundamental parameters. We propose a differential method to determine stellar properties of solar-like oscillations which we call “differential seismology of stellar twins”. [less ▲]

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See detailObservations of Red Giants in the Cluster NGC 6633 by the CoRoT Space Mission and the HARPS and SOPHIE Spectrometers
Barban, C.; Baudin, F.; Poretti, E. et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

The CoRoT space mission and the HARPS and SOPHIE ground-based spectrometers have observed red giants belonging to the open cluster NGC 6633. Solar-like oscillations are detected in the CoRoT data obtained ... [more ▼]

The CoRoT space mission and the HARPS and SOPHIE ground-based spectrometers have observed red giants belonging to the open cluster NGC 6633. Solar-like oscillations are detected in the CoRoT data obtained for four red giants. Spectroscopic data questions the cluster membership of one of these stars. The combination of these photometric and spectroscopic data will be a unique opportunity to estimate their global parameters as well as to probe their internal structure. [less ▲]

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See detailNon-Perturbative Effect of Rotation on Dipolar Mixed-Modes in Red Giants
Ouazzani, R.-M.; Goupil, M.-J.; Dupret, Marc-Antoine ULg et al

in Astronomical Society of the Pacific Conference Series (2013, December 01)

The space missions CoRoT (Convection Rotation and Planetary Transits) and Kepler provide high quality data that allows the transport of angular momentum in stars to be investigated by the seismic ... [more ▼]

The space missions CoRoT (Convection Rotation and Planetary Transits) and Kepler provide high quality data that allows the transport of angular momentum in stars to be investigated by the seismic determination of the internal rotation profile. In a former study (Ouazzani et al. 2013b) we test the validity of seismic diagnostics for red giant rotation that are based on a perturbative method. Our aim here is to investigate oscillation spectra when that validity no longer holds. We use a non-perturbative approach implemented in the Adiabatic Code of Oscillations including Rotation (ACOR code) (Ouazzani et al. 2012) that accounts for the eff [less ▲]

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See detail"Le roi Louis, en admiration devant le repas du Christ à Milan". Les Français et la "Cène" de Léonard de Vinci
Fagnart, Laure ULg

in Elsig, Frédéric; Natale, Mauro (Eds.) Le duché de Milan et les commanditaires français (1499-1521) (2013, December)

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See detailA management control perspective of sustainability reporting in higher education : in search of a holistic view
Ceulemans, Kim; Van Caillie, Didier ULg; Molderez, Isabelle et al

in Lehner, Othmar; Harrison (Eds.) Proceedings in Finance and Risk series '13 (2013, December)

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See detailINFLUENCE OF SOLUBLE PROTEINS ON THE ADHERENCE OF PARTICULATE SOILS
Toure, Yetioman ULg; Rouxhet, Paul; Dupont-Gillain, Christine et al

in Malayeri, Reza; Watkinson, Paul A.; Müller-Steinhagen, Hans (Eds.) Proceedings of International Conference on Heat Exchanger Fouling and Cleaning - 2013 (Peer-reviewed) (2013, December)

Adsorbed compounds from food and pharmaceutical mixtures may influence interactions at interfaces and thus fouling and cleaning. In this study, quartz particles (10 to 30µm) were used as a model soil for ... [more ▼]

Adsorbed compounds from food and pharmaceutical mixtures may influence interactions at interfaces and thus fouling and cleaning. In this study, quartz particles (10 to 30µm) were used as a model soil for examining the effect of dissolved proteins on the cleanability of substrates after soiling and drying. Glass and stainless steel pretreated by UV-Ozone (StSteel-UVO) were used as model hydrophilic substrates, while hydrophobic substrates were represented by stainless steel cleaned with ethanol (StSteel-Eth) and polystyrene. BSA and β-LGB were used as proteins. The quartz suspensions used for soiling were prepared in pure water and in a solution of each protein. After soiling and drying, the cleanability was evaluated using a radial-flow cell, with pure water as the cleaning fluid. The presence of proteins in the suspension used for soiling hydrophilic substrates (Glass and StSteel-UVO), decreased the adherence of quartz particles. Its effect was less marked and tended to be opposite for less hydrophilic substrates (StSteel-Eth, Polystyrene). The adherence cannot be explained by a simple relation with the contact angle. Other factors may be the solution surface tension itself and the protein behavior at the interfaces created by drying and by rehydratation during cleaning. When considering the influence of substrate on soiling, it must be kept in mind that high surface energy solids (metals, oxides) are readily contaminated in contact with air and lose their hydrophilicity. This may improve the substrate behavior regarding cleanability with respect to particulate soil. [less ▲]

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See detailOn periodic reference tracking using batch-mode reinforcement learning with application to gene regulatory network control
Sootla, Aivar; Strelkowa, Natajala; Ernst, Damien ULg et al

in Proceedings of the 52nd Annual Conference on Decision and Control (CDC 2013) (2013, December)

In this paper, we consider the periodic reference tracking problem in the framework of batch-mode reinforcement learning, which studies methods for solving optimal control problems from the sole knowledge ... [more ▼]

In this paper, we consider the periodic reference tracking problem in the framework of batch-mode reinforcement learning, which studies methods for solving optimal control problems from the sole knowledge of a set of trajectories. In particular, we extend an existing batch-mode reinforcement learning algorithm, known as Fitted Q Iteration, to the periodic reference tracking problem. The presented periodic reference tracking algorithm explicitly exploits a priori knowledge of the future values of the reference trajectory and its periodicity. We discuss the properties of our approach and illustrate it on the problem of reference tracking for a synthetic biology gene regulatory network known as the generalised repressilator. This system can produce decaying but long-lived oscillations, which makes it an interesting application for the tracking problem. [less ▲]

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See detailEvaluation de la composition des huiles d’olive de nouvelles variétés d’olivier introduites dans la région orientale du Maroc
Mansouri, Farid; Ben moumen, Abdessamad; Fauconnier, Marie-Laure ULg et al

in 6èmes Journées internationales d'étude sur les lipides - Programme scientifique, Recueil des Résumés (2013, December)

Le secteur oléicole marocain a connu une évolution importante au niveau des superficies qui ont atteint 900000 ha (*MAPM, 2011). La structure variétale du verger oléicole marocain est caractérisée par la ... [more ▼]

Le secteur oléicole marocain a connu une évolution importante au niveau des superficies qui ont atteint 900000 ha (*MAPM, 2011). La structure variétale du verger oléicole marocain est caractérisée par la prédominance de la Picholine marocaine, qui représente plus de 96 % du patrimoine national et qui est à double fin. [less ▲]

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See detailInfluence de la fatigue sur la foulée lors d’une épreuve d’endurance intense
Bury, Thierry ULg

in Abstract book du Colloque Médico-sportif (2013, December)

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See detailVingt minutes en Utopie: l'ALWi
Baiwir, Esther ULg; Renders, Pascale ULg

in Baiwir, Esther; Renders, Pascale (Eds.) Actes de la 5e Journée liégeoise de Traitement des Sources Galloromanes (Liège, 16 mai 2013) (2013, December)

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See detailEffet du stress hydrique sur la composition biochimique des huiles de quatre variétés de carthame (Carthamus tinctorius) produites dans la région orientale du Maroc.
Ben moumen, Abdessamad; Mansouri, Farid; Fauconnier, Marie-Laure ULg et al

in 6èmes Journées internationales d'étude sur les lipides - Programme scientifique, Recueil des Résumés (2013, December)

L'huile de carthame est produite sur une échelle relativement réduite dans certaines régions d'Afrique du Nord et du Moyen-Orient. Cette huile a été caractérisée dans différentes régions du monde et ... [more ▼]

L'huile de carthame est produite sur une échelle relativement réduite dans certaines régions d'Afrique du Nord et du Moyen-Orient. Cette huile a été caractérisée dans différentes régions du monde et plusieurs expériences ont montré une grande variabilité en fonctions des variétés, des sols et des conditions climatiques. [less ▲]

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See detailStructural Modelling of the Annulus Fibrosus - an Anisotropic Hyperelastic Model Approach at the Lamellar Level
Mengoni, Marlène ULg; Wijayathunga, V. N.; Jones, Alison C. et al

in Nithiarasu, P.; Löhner, R. (Eds.) Proceedings of the 3rd International Conference on Computational Mathematical Biomedical Engineering (2013, December)

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See detailA giant treated with growth hormone
Rostomyan, Liliya ULg; Potorac, Iulia ULg; CASTERMANS, Emilie ULg et al

in The 3rd ENEA Workshop : Hypopituitarism - Abstract book (2013, December)

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See detailHypopituitarism in pituitary gigantism (results of an international study)
Rostomyan, Liliya ULg; Daly, Adrian ULg; Shah, NS et al

in The 3rd ENEA Workshop : Hypopituitarism - Abstract book (2013, December)

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See detailÉtiopathogénie de la myopathie atypique et gestion raisonnée des cas
Votion, Dominique ULg; Patarin, Florence; Cerri, Simona ULg et al

in In Proceedings: Journée AVEF (Association des Vétérinaires Equins Français) (2013, December)

Atypical myopathy is an acute intoxication resulting from the ingestion of a toxin contained in the seeds of some trees of the genus Acer (i.e. « maple trees »). The causes of the emergence of the disease ... [more ▼]

Atypical myopathy is an acute intoxication resulting from the ingestion of a toxin contained in the seeds of some trees of the genus Acer (i.e. « maple trees »). The causes of the emergence of the disease due to trees naturalized for many decades remain undetermined. Currently, there is no cure for atypical myopathy but symptomatic treatment may be revisited on the basis of knowledge of the aetio-pathogenesis of the disease. This paper compiles recommendations following a discussion on treatment of atypical myopathy held in October 2013 at the University of Liege (Belgium) to provide emergency treatment distinguishing clinical management (1) at hospital, (2) in the field and (3) preventive measures to protect pasture companions. [less ▲]

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See detailPotentiel d'utilisation de la spectrometrie moyen infrarouge pour prédire le rendement fromager du lait et étudier sa variabilité génétique
Colinet, Frédéric ULg; Troch, Thibault ULg; Abbas, O. et al

in 20èmes Rencontres Recherches Ruminants, Paris, les 4 et 5 Décembre 2013 (2013, December)

Fournir une indication rapide, fiable et bon marché du rendement fromager pour un lait donné, sans devoir appliquer des formules (empiriques ou théoriques) à partir des concentrations préalablement ... [more ▼]

Fournir une indication rapide, fiable et bon marché du rendement fromager pour un lait donné, sans devoir appliquer des formules (empiriques ou théoriques) à partir des concentrations préalablement déterminées pour différents constituants du lait, serait un outil utile et économiquement intéressant tant pour les éleveurs que pour l’industrie laitière. En vue d’étudier la variabilité génétique du rendement fromager à l’échelle du cheptel bovin wallon, des méthodes chimiométriques ont été utilisées afin de développer des équations de prédictions basées sur des spectres moyen infrarouge (MIR) pour les rendements fromagers déterminés en laboratoire et exprimés en frais (RdFF) ou en sec (RdFS). Ceux-ci ont été déterminés sur 258 échantillons de lait analysés en spectrométrie MIR. Les équations de prédiction à partir du spectre MIR du lait ont été développées en utilisant la régression des moindres carrés partiels (PLS) avec une validation croisée interne appliquée sur la dérivée première des spectres MIR. Les coefficients de détermination de validation croisée (R²cv) des équations étaient de 0,81 pour les prédictions du RdFF et de 0,82 pour les celles du RdFS. Les rapports des performances sur les variabilités (RPD) étaient égaux à 2,3. Ces résultats peuvent permettre d’envisager une bonne utilité pratique pour leur prédiction respective, notamment dans le cadre de recherches génétiques. Ces équations ont été appliquées sur la base de données spectrales générée dans le cadre du contrôle laitier wallon. Les composantes de la variance ont été estimées séparément pour le RdFF et le RdFS basées sur un modèle animal « contrôles élémentaires » utilisant des régressions aléatoires. Le jeu de données utilisé comportait 51 537 prédictions pour 7 870 vaches primipares Holstein. Les héritabilités journalières moyennes variaient entre 0,31 (au 5ème jour de lactation (JDL)) et 0,59 (au 279ème JDL) pour le RdFF et entre 0,31 (au 5ème JDL) et 0,57 (au 299ème JDL) pour le RdFS. Ces héritabilités journalières modérées à élevées ont indiqué le potentiel de sélection génétique pour ces deux caractères. [less ▲]

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See detailUnderstanding variable importances in forests of randomized trees
Louppe, Gilles ULg; Wehenkel, Louis ULg; Sutera, Antonio ULg et al

in Advances in Neural Information Processing Systems 26 (2013, December)

Despite growing interest and practical use in various scientific areas, variable importances derived from tree-based ensemble methods are not well understood from a theoretical point of view. In this work ... [more ▼]

Despite growing interest and practical use in various scientific areas, variable importances derived from tree-based ensemble methods are not well understood from a theoretical point of view. In this work we characterize the Mean Decrease Impurity (MDI) variable importances as measured by an ensemble of totally randomized trees in asymptotic sample and ensemble size conditions. We derive a three-level decomposition of the information jointly provided by all input variables about the output in terms of i) the MDI importance of each input variable, ii) the degree of interaction of a given input variable with the other input variables, iii) the different interaction terms of a given degree. We then show that this MDI importance of a variable is equal to zero if and only if the variable is irrelevant and that the MDI importance of a relevant variable is invariant with respect to the removal or the addition of irrelevant variables. We illustrate these properties on a simple example and discuss how they may change in the case of non-totally randomized trees such as Random Forests and Extra-Trees. [less ▲]

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See detailIslamic food practices in migration context. An ethnography among Moroccan women in Milan.
Mescoli, Elsa ULg

in Toguslu, Erkan; Leman, Johan; Ozdemir, Saliha (Eds.) Everyday Life Practices of Muslims in Europe: Consumption and Aesthetics. (2013, November 28)

My study focuses on the culinary practices of Moroccan women living in Milan hinterland in Italy. By adopting a praxeological approach (Warnier 2001), I study female subjectivation processes realized ... [more ▼]

My study focuses on the culinary practices of Moroccan women living in Milan hinterland in Italy. By adopting a praxeological approach (Warnier 2001), I study female subjectivation processes realized through food. My attention is given to (micro)practices (De Certeau 1980, Foucault in Martin 1993, Mahmood 2005, Mauss 1936) performed daily, by means of which the women considered shape their self and affirm their religious belonging in private and in public contexts. Islamic normativity concerning food issues is at matter here, thus being analyzed in its multifaceted complexity. As a matter of fact, the actors involved need to face the constraints imposed by the migration context while trying to comply with religious rules, in their turns intertwined with remembered embodied practices. This implies some negotiations to be made, in particular concerning a different articulation of time, but also the mobilization of tactics and strategies (De Certeau 1980) to guarantee a reassuring proper self-definition. In the private space, food practices keep on being influenced not only by the Islamic dietary prescriptions affirming what is not possible to eat, but also by the indications stressing what to eat – and eventually when and how to prepare it. A private consumption, reflecting a specific belief, materially informs a spiritual definition of the self. Furthermore, such dynamics go out the domestic context and perform in the public space. Everyday practices, and in particular those related to food, let an expression of Muslim migrants’ identity be realized in overdetermined backgrounds such as that which is under study. As a matter of fact, by preparing and sharing food, Moroccan women participate to local events - and consequently to the city social life - and thus they are allowed to affirm in public their religious belonging and some related claims. The so called “ethnic food” is protagonist of numerous intercultural events, aimed at letting an encounter with religious diversity take place in the perspective of a culture to taste. In those occasions, once a relationship is set up, other important issues can be approached, such as that of the freedom to practice religion. My presentation will try to highlight such complex dynamics, stressing on the materiality of religious subjectivation. Photos and videos recording everyday practices and objects will be used to visually support the reflections presented. De Certeau, Michel (1980). L’invention du quotidien. Tome I. Arts de faire. Paris: Gallimard. Mahmood, Saba (2005). Politics of piety: the Islamic revival and the feminist subject, Princeton, N.J.: Princeton University Press. Martin, Luther H.; Gutman, Huck e Hutton, Patrick H. (eds.) (1992). Tecnologie del sé. Un seminario con Michel Foucault, Torino: Bollati Boringhieri. Mauss, Marcel (1936). Les techniques du corps, in Journal de Psychologie, XXXII, ne, 3-4, 15 mars - 15 avril. Warnier Jean-Pierre (2001). A praxeological approach to subjectivation in a material world, in Journal of Material Culture, Vol. 6(1): 5–24. [less ▲]

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See detailPerspectives offertes par la culture en association de froment et de pois protéagineux d’hiver
Pierreux, Jérome ULg; Delaplace, Pierre ULg; Roisin, Christian et al

in Autonomie protéique et biométhanisation à la ferme (2013, November 27)

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See detailLe zonage de l’insécurité alimentaire du Système d’Alerte Précoce au Niger : l’indice de vulnérabilité
Andres, Ludovic ULg; Lebailly, Philippe ULg

in Actes du Premier Colloque de l'université de Parakou (2013, November 27)

La République du Niger a mis en place à partir de 1989 le Système d’Alerte Précoce (SAP) à cause des crises alimentaires récurrentes. L’objectif du SAP vise à prévenir et gérer les crises alimentaires. La ... [more ▼]

La République du Niger a mis en place à partir de 1989 le Système d’Alerte Précoce (SAP) à cause des crises alimentaires récurrentes. L’objectif du SAP vise à prévenir et gérer les crises alimentaires. La prévention des crises alimentaires est réalisée en décrivant l’état de l’insécurité alimentaire par département. Il est évalué par un indice composite construit à partir de données secondaires récoltées par des fiches d’identification durant le mois d’octobre. L’objectif de l’article est de décrire la méthode d’évaluation de l’indice et d’étudier l’évolution de l’indice de vulnérabilité. L’étude de l’évolution de l’indice de vulnérabilité du SAP est réalisée grâce à l’étude d’une série chronologique. Les tendances évolutives seront caractérisées pour la période allant de 1992 à 2011, soit l’évolution de l’indice sur vingt ans. L’étude de l’indice du SAP nous permettra de valider les observations que nous avons déjà réalisées dans certains articles abordant les méthodes d’évaluation de la vulnérabilité alimentaire. Le zonage géographique des indices des 37 départements du Niger montre une différence entre les départements pastoraux, agropastoraux et agricoles (Andres L. et Lebailly Ph., 2011a ; Andres L. et Lebailly Ph., 2011b ; Andres L. et Lebailly Ph., 2012 ; Andres L., 2012). En outre, nos résultats démontreront l’aspect conjoncturel des crises alimentaires sans montrer une tendance générale en fonction des départements et des systèmes de production même si les départements présentent une résilience. [less ▲]

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See detailL’innovation "autonome" en agriculture de conservation : Du désintérêt vis-à-vis des acteurs historiques du développement agricole à la quête d’une alliance renouvelée avec la recherche scientifique
Dannevoye, Bastien ULg; Vankeerberghen, Audrey ULg; Stassart, Pierre M ULg

in Actes du colloque "Nouvelles formes d’agriculture : pratiques ordinaires, débats publics et critique sociale", INRA Dijon (2013, November 21)

Cette communication présente plusieurs raisons de l’organisation autonome de l’expérimentation et de l’innovation agronomiques, en matière de durabilité et de gestion des sols, au sein de groupes ... [more ▼]

Cette communication présente plusieurs raisons de l’organisation autonome de l’expérimentation et de l’innovation agronomiques, en matière de durabilité et de gestion des sols, au sein de groupes d’agriculteurs et de techniciens se revendiquant d’une agriculture "sans labour" et/ou "de conservation", en France et en Belgique (Région Wallonne). Après un rappel du développement historique des "techniques sans labour" dans les régions enquêtées, la communication rentre dans le détail des motivations des agriculteurs. Celles-ci ont été rassemblées en deux grandes catégories de "critiques" : les critiques envers la recherche agronomique publique, et les critiques envers les acteurs privés de l’agrofourniture. En nous référant à la théorie de l’acteur-réseau (Callon, 1986), nous comprenons ces critiques comme des éléments essentiels d’une dynamique de désintéressement vis-à-vis des traductions historiques de ces acteurs institutionnels ou économiques, cherchant par-là à montrer comment ce désintéressement peut constituer une justification suffisante à la (re)prise en charge de l’innovation par les praticiens. Ces derniers rejettent ainsi le schéma de développement agronomique dit "diffusionniste" hérité de la Seconde Guerre mondiale, selon lequel les missions de recherche et d’innovation avaient été confiées respectivement à des instituts publics de recherche agronomique et aux firmes. En conclusion, nous montrons que ces critiques sont loin d’être des attitudes "anti-scientifiques" ou "anti-marché" mais expriment au contraire des volontés de rencontres et de travail collaboratif renouvelé entre ces acteurs ou ces "rôles prescrits". Les acteurs "désintéressés" de traductions anciennes deviennent ainsi les promoteurs d’une nouvelle problématisation [less ▲]

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See detailLes semences non-industrielles : une hétérogénéité de pratiques mettant en cause le fixisme
Hecquet, Corentin ULg

in Les semences non-industrielles : une hétérogénéité de pratiques mettant en cause le fixisme (2013, November 20)

Les débats concernant les semences occupent depuis quelques années l’espace public. Se centrer sur cet objet permet de comprendre comment se construit une critique par des discours (dénonciation) et des ... [more ▼]

Les débats concernant les semences occupent depuis quelques années l’espace public. Se centrer sur cet objet permet de comprendre comment se construit une critique par des discours (dénonciation) et des pratiques (proposition). Ces enjeux scientifiques s’inscrivent dans une perspective agroécologique (Stassart, Baret et al. 2012). La critique porte sur le processus de désappropriation des semences et des connaissances et s’inscrit dans le paradigme productiviste (Bonneuil C. , Demeulenaere E. et al. 2006). Ma question de recherche au sujet des différentes constructions de qualification des semences non industrielles se fonde sur mes lectures reprises dans un état des lieux (partie 1). Par semences non industrielles j’entends celles qui ne sont pas inscrites dans une perspective productiviste. Afin de décrypter, j’utilise un cadre analytique constitué de trois catégories questions (la caractérisation ; les modes organisationnels et de circulation ; le positionnement juridico-politique). Ce cadre offre une lecture des tensions et synergies au sein de chacun des cas repris dans la deuxième partie (Kaol Kohz ; Kokopelli ; Semailles ; Bionatur). Leur hétérogénéité balise les cas d’étude. Ils offrent à comprendre les différentes stratégies développées par les pratiques des porteurs de projet, elles vont de l’utilisation du dispositif déployé par le régime semencier à la désobéissance en vue de qualifier leurs semences. Il est également nécessaire de comprendre comment chacun des projets parvient à chercher/maintenir sa proposition. Ce papier ambitionne non à présenter des résultats, mais plutôt comment produire des résultats sur cette question. [less ▲]

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See detailLaser-induced contamination and its impact on laser damage threshold
Schröder, H; Wagner, P; Kokkinos, Dimitrios ULg et al

in Laser-induced contamination and its impact on laser damage threshold (2013, November 14)

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See detailLa redéfinition du premier ordre au début de la Renaissance : l'exemple du cardinal d'Amboise
Dumont, Jonathan ULg

in Dumont, Jonathan; Fagnart, Laure (Eds.) Georges Ier d'Amboise. 1460-1510. Une figure plurielle de la Renaissance. Actes du colloque tenu à l'Université de Liège les 2 et 3 décembre 2010 (2013, November 08)

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See detailSEDIMENTARY DEVELOPMENT AND MAGNETIC SUSCEPTIBILITY OF THE FRASNIAN CARBONATE PLATFORM IN WESTERN BELGIUM (DINANT SYNCLINORIUM, LA THURE SECTION)
Pas, Damien ULg; Da Silva, Anne-Christine ULg; Labaye, Corentin et al

in 14 ième ASF 2013 (Association des Sédimentologistes Français) (2013, November 07)

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See detailAthena+: The first Deep Universe X-ray Observatory
Barret, D.; Nandra, K.; Barcons, X. et al

in Cambresy, L.; Martins, F.; Nuss, E. (Eds.) et al SF2A-2013: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics (2013, November 01)

The Advanced Telescope for High-energy Astrophysics (Athena+) is being proposed to ESA as the L2 mission (for a launch in 2028) and is specifically designed to answer two of the most pressing questions ... [more ▼]

The Advanced Telescope for High-energy Astrophysics (Athena+) is being proposed to ESA as the L2 mission (for a launch in 2028) and is specifically designed to answer two of the most pressing questions for astrophysics in the forthcoming decade: How did ordinary matter assemble into the large scale structures we see today? and how do black holes grow and shape the Universe? For addressing these two issues, Athena+ will provide transformational capabilities in terms of angular resolution, effective area, spectral resolution, grasp, that will make it the most powerful X-ray observatory ever flown. Such an observatory, when opened to the astronomical community, will be used for virtually all classes of astrophysical objects, from high-z gamma-ray bursts to the closest planets in our solar neighborhood. In this paper, we briefly review the core science objectives of Athena+, present the science requirements and the foreseen implementation of the mission, and illustrate its transformational capabilities compared to existing facilities. [less ▲]

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See detailDEPOSITIONAL ENVIRONMENT OF THE EARLY FRASNIAN TO EARLY FAMENNIAN SLOPE DEPOSITS OF MOUNT FREIKOFEL (CARNIC ALPS, AUSTRIA/ITALY)
Pas, Damien ULg; Da Silva, Anne-Christine ULg; suttner, Thomas et al

in 14 ième ASF 2013 (Association des Sédimentologistes Français) (2013, November)

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See detailContribution à la recherche des conditions optimales pour élever des lapins en parcs hors sol : Résultats d’un centre de référence et d’expérimentation en Belgique en conditions de production
Jacquet, Michel; Bauwens, Véronique; Teller, Christian et al

in Itavi (Ed.) Proceedings 15ème journées de la recherche cunicole (2013, November)

L’évolution de la perception sociétale du bien-être animal et de l'élevage engage la production à chercher des alternatives aux cages conventionnelles. Dans cette expérimentation en engraissement en ... [more ▼]

L’évolution de la perception sociétale du bien-être animal et de l'élevage engage la production à chercher des alternatives aux cages conventionnelles. Dans cette expérimentation en engraissement en conditions de production, durant un an, les performances (techniques et statut sanitaire) ont été suivies dans un logement en parcs hors sol (bâtiment 1), sur plancher en caillebotis en plastique normalement conçu pour porcelets, enrichis avec une plate-forme surélevée, matériau à ronger et cachette. Sans effectuer une comparaison scientifique de deux systèmes (parc hors sol et cage), les auteurs situent les performances enregistrées en parcs durant 7 bandes (960 lapins par bande) vis-à-vis de celles obtenues simultanément dans le même élevage, dans un logement en cages conventionnelles et enrichies (bâtiment 2), en tout plein tout vide (7 bandes et 4200 lapins par bande). Les parcs hors sol, a priori profitables au bien-être animal, non bivalents (donc changement au sevrage) ont été défavorables à la santé des lapins et à la viabilité de la production. La coccidiose intestinale a contribué à une hausse sévère de la mortalité (13,8% contre 4,8% en cages) ; de fortes baisses de performances techniques et économiques ont été constatées et la situation a contraint à un traitement anticoccidien. [less ▲]

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See detail(Tentative) Conclusions of the Conference
Paile, Sylvain ULg

in Paile, Sylvain; Gell, Harald (Eds.) 5 years of the European Initiative for the Exchange of Young Officers Inspired by Erasmus, Lessons Learnt from the International Military Academies Forum 2013 (2013, November)

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See detailRoles of Civic Priests in Hellenistic Cos
Paul, Stéphanie ULg

in Horster, Marietta; Klöckner, Anja (Eds.) Cities and Priests. Cult Personnel in Asia Minor and the Aegean Islands from the Hellenistic to the Imperial Period (2013, November)

The abundance and interest of the epigraphic evidence from the is- land of Cos after the synoecism of 366 BC makes it a very valuable case-study for understanding how the religious life of a polis was ... [more ▼]

The abundance and interest of the epigraphic evidence from the is- land of Cos after the synoecism of 366 BC makes it a very valuable case-study for understanding how the religious life of a polis was organized in the Hellenistic period. The topic of civic priesthoods is particularly well documented by various types of inscriptions, such as priesthood regulations, sacrificial calendars and contracts of sales. Based on a close study of this evidence, this paper will exa- mine the roles played by priests in the cults of the gods of the civic pantheon, as well as the relationship between these officials and the polis which appointed them. It will address as its main question how the priest’s position as mediator between the polis community and the divine sphere was manifested. [less ▲]

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See detailLa qualité de force relative : paramètre sous-exploité ?
Croisier, Jean-Louis ULg; Delvaux, François ULg; Cordonnier, Caroline ULg et al

in Livret des interventions - XVèmes Rencontres Médimex - "Isocinétisme - Actualités et Controverses" (2013, November)

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See detailRééducation des plasties du LCA : quels pièges ?
Croisier, Jean-Louis ULg; BAUVIR, Philippe ULg; NAMUROIS, Marie-Hélène ULg et al

in Abstract Book du Symposium d'Axxon - Actualité en Kinésithérapie (2013, November)

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See detailLe mode excentrique appliqué aux rotateurs d'épaule
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Livret des interventions - XVèmes Rencontres Médimex - "Isocinétisme - Actualités et Controverses" (2013, November)

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See detailRecent advances in the biomonitoring of trace elements using P. oceanica (L.) Delile
Gobert, Sylvie ULg; Richir, Jonathan ULg

in de Lange, Gert J.; Gacic, Miroslav; Romaña, Axel (Eds.) et al 40th CIESM Congress Proceedings (2013, November)

One of the most studied bioindicator in the Mediterranean is the seagrass Posidonia oceanica. Trace element (TE) monitoring surveys using that species have however mostly focussed on a few elements (e.g ... [more ▼]

One of the most studied bioindicator in the Mediterranean is the seagrass Posidonia oceanica. Trace element (TE) monitoring surveys using that species have however mostly focussed on a few elements (e.g. Pb, Cd), while numerous others, efficiently bioconcentrated by the plant and potentially toxic, have been barely or not studied (e.g. Ag, V, Bi). Furthermore, although P. oceanica bioaccumulation behaviour relies on synergistic effects between the sampling environment and its ecophysiology, this aspect has been mostly underestimated until now. This study presents recent advances in the biomonitoring of TEs using P. oceanica and insists on the necessity of developing consensual monitoring protocols in order to improve its use as bioindicator. [less ▲]

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See detailLe Silurien – Dévonien du Bassin de Berkine (Algérie) : Étude des niveaux réservoirs et de la série des argiles pour les projets «Shale Gas»
Djouder, Hocine ULg; Murat, Bruno; Musial, Geoffray et al

in 14ème Congrès Français de Sédimentologie (2013, November)

Situé dans le Sud Est algérien, à la limite des frontières algéro-tunisienne et libyenne, le Bassin de Berkine est un bassin intracratonique qui s’étend sur près de 102 000 km2. Au Paléozoïque inférieur ... [more ▼]

Situé dans le Sud Est algérien, à la limite des frontières algéro-tunisienne et libyenne, le Bassin de Berkine est un bassin intracratonique qui s’étend sur près de 102 000 km2. Au Paléozoïque inférieur, cette étendue était le siège d’une sédimentation silicoclastique puissante. Cette étude est focalisée sur le Silurien et le Dévonien. Car le Bassin de Berkine renferme des réservoirs potentiels : Alternances argilo-gréseuses (AAG) du Silurien sommital et les grès massifs du Lochkovien-Praguien et Emsien. Mais également des roches mère, telle que les argiles radioactives du Silurien, très mature, et du Frasnien. En effet, les gisements atypiques non-conventionnels, à roches sédimentaires faiblement perméables, constituent une source pétrolière majeure d’où un regain d’intérêt potentiel au sein du Bassin de Berkine. Au total 146 puits et une dizaine de carottes ont fait l’objet d’une analyse de facies/électrofacies et de stratigraphie séquentielle haute résolution. Ceci est dans le but de caractériser les séquences de dépôts et leurs environnements respectifs, puis de prédire la géométrie-cartographie des corps sédimentaires. Au final, de caractériser les propriétés pétrophysiques des « Plays » potentielles. Cinq séquences principales sont mises en évidence pour le Silurien, dans le secteur de Menzel Lejmat et le Sillon de Marfag, du Bassin de Berkine. Les séquences Si-1 et Si-2 sont datées du Llandoverien. Au cours de cette période, le bassin était le siège d’une importante sédimentation argileuse de « Hot Shales » et d’Argiles à Graptolites de 500 à 650 m d’épaisseur. Ces faciès argileux de plateforme externe profonde passent au sommet à des faciès carbonatés très vite succédés par des sédiments gréseux (séquences Si-3, Si-4 et Si-5) initiateurs d’un contexte deltaïque progradant du Sud vers le Nord. Au Dévonien, les séquences Si-6, formation Tadrart (Lochkovien et Pragien) et Si-7 (Emsien) à grès massifs fluviatile-estuarien sont affectés par des minéraux Authigènes, tels que la Chamosite. Ces revêtements chloriteux des grains préserve la porosité mais réduisent la perméabilité et contribuent à la destruction des propriétés pétrophysiques de ces réservoirs. La séquence Si-8 (Eifélien-Givétien) atteint 110 m d’épaisseur est essentiellement carbonatée. Par la suite, l’installation définitive des argiles radioactives du Frasnien-Fammenien (séquence Si-9) en discordance. [less ▲]

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See detailLa photographie de mode, entre transition er classicisme. Le cas Prada
Dondero, Maria Giulia ULg

in Villelongue, Martine; Saroli, Julie (Eds.) Défier le temps, une affaire de mode (2013, November)

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See detailEvaluation of arabinoxylan oligosaccharides on physicochemical properties of chitosan based films
Costa, Maria J.; Cerqueira, Miguel A.; Ruiz, Hector A. et al

in Lagarón, José M.; Cabedo, Luis; López, Amparo (Eds.) et al Polymar 2013 [Recurs electrònic]: 1st. International Conference in polymers with special focus in early stage researchers (2013, November)

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See detailCord blood banking Introduction-State of the art
BAUDOUX, Etienne ULg

in Gluckman, Eliane; Cavazzana (Eds.) World Cord blood congress IV and innovative therapies for sickle cell disease (2013, October 25)

Since the early years 1990 when the first cord blood (CB) banks were created, the worldwide inventory has grown considerably to a current 590 thousand units that complement the 22 M donors to provide ... [more ▼]

Since the early years 1990 when the first cord blood (CB) banks were created, the worldwide inventory has grown considerably to a current 590 thousand units that complement the 22 M donors to provide hematopoietic progenitor cells (HPC) to patients in need of an allogeneic transplantation. The existing inventory shows a high degree of heterogeneity with a significant number of units below the current transplantation standards for adult patients. In the mean time, the use of CB as a HPC source has remained steady over the last years, leading to a relative decrease in the release activity in each individual bank. New challenges and innovations have emerged, such as: • More stringent regulations in the USA and in the EU • Upgrades in professional standards • Competing transplantation approaches such as easier access to adult unrelated donors (UD), use of haplo identical donors, single or multiple CB transplantation • CB collection safety becoming a concern since issues have been raised about the outcome of newborns linked to their iron status • The definition of clear criteria for transplant selection (HLA typing level, cell contents) • Potential role of CB banks in non hematological CB use (use of CB byproducts, generation of iPS from selected universal donors, immunotherapy, HIV therapy) • Financial restrictions The elements mentioned above have lead banking strategies, including recruitment, donor selection, CB collection, processing, storage and release to evolve considerably and to incorporate • Active volunteer accreditation processes for international recognition • Donor recruitment: more detailed and selective donor evaluation • Systematic nucleic acid (NAT) testing for infectious disease markers (IDM) • Extensive use of molecular HLA typing and widening range of loci to be taken into account • Evolving definition of acceptance criteria for incoming CB units, (i.e. stricter TNC requirements) • Well standardized processing and storage methods • Evaluation and adaptation of supply vs. needs in strategic approaches • Need to increase and optimize CB visibility through up to date electronic solutions • Methods to have a permanent and up to date overview of post transplantation outcomes, including elements relevant to the banking and clinical side Professional organizations (NetCord, WMDA, FACT, WBMT) are in the process of tightening their links in order to increase interactions and respond in time to upcoming challenges and evolutions of the field. [less ▲]

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See detailFermentable Carbohydrates and dietary protein level differently shape the bacterial community structure in the proximal colon of pigs
Boudry, Christelle ULg; Pieper, Robert; Vahjen, Wilfried et al

in International workshop on nutrition and intestinal microbiota host interaction in the pig : Book of abstracts (2013, October 24)

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See detailInteraction between dietary protein level and source of fermentable carbohydrates in the gastrointestinal tract of pigs
Pieper, Robert; Boudry, Christelle ULg; Vahjen, Wilfried et al

in International workshop on nutrition and intestinal microbiota host interaction in the pig : Book of abstracts (2013, October 24)

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See detailNovel fibroblast growth factor receptor 1 mutation causing normosmic idiopathic hypogonadotropic hypogonadism
Chachati, Anne-Sophie ULg; Potorac, Iulia ULg; DEBRAY, François-Guillaume ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailModification of hormonal secretion in macroprolactinoma on treatment
VROONEN, Laurent ULg; Rostomyan, Liliya ULg; Potorac, Iulia ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailBifocal intracranial germinoma : is biopsy still mandatory ?
KREUTZ, Julie ULg; TSHIBANDA, Luaba ULg; BONNEVILLE, Jean-François ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailPituitary magnetic resonance imaging in gigantism : first result after analysis of 16 cases
BECK, Emmanuel ULg; KREUTZ, Julie ULg; TSHIBANDA, Luaba ULg et al

in 23rs meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailA particular multiple endocrine neoplasia
Boccar, S; VROONEN, Laurent ULg; HAMOIR, Etienne ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailCorrelations of the High Resolution MRI aspect of GH-secreting pituitary adenomas prior to treatment
Potorac, Iulia ULg; PETROSSIANS, Patrick ULg; Schillo, F et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailCharacteristics of patients with AIP mutation-related prolactinomas
Camby, S; Daly, Adrian ULg; VROONEN, Laurent ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailPPNAD- a rare cause of Cushing's syndrome
Rostomyan, Liliya ULg; PETIGNOT, Sandrine ULg; VROONEN, Laurent ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailHypercalcemia treated by sunitinib
LOLY, Jean-Philippe ULg; VALDES SOCIN, Hernan Gonzalo ULg; Daly, Adrian ULg et al

in 23rd meeting of the Belgian Endocrine Society - Abstract book (2013, October 19)

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See detailÉlaboration du référentiel de compétences du master bioingénieur en Sciences et Technologies de l'Environnement
Colaux-Castillo-Bocanegra, Catherine ULg; Colinet, Gilles ULg; Debouche, Charles ULg et al

in Poulin, Richard (Ed.) Séminaire CITEF 2013 La liaison formation-emploi : l'approche compétences et la formation tout au long de la vie (2013, October 18)

Le département des Sciences et Technologies de l’Environnement (STE) de Gembloux Agro-Bio Tech faculté de l’Université de Liège a profité d’un changement d’intitulé de son diplôme de bioingénieur pour ... [more ▼]

Le département des Sciences et Technologies de l’Environnement (STE) de Gembloux Agro-Bio Tech faculté de l’Université de Liège a profité d’un changement d’intitulé de son diplôme de bioingénieur pour réviser son programme des études. Pour ce faire, il a adopté l’approche compétence. Afin de préparer au mieux ses futurs diplômés aux attentes du monde professionnel actuel et à venir, des anciens diplômés et des employeurs potentiels ont participé à la validation du référentiel de compétences associé à cette formation. Cette publication reprend les étapes clés de la création du référentiel de compétences et son exploitation dans la conception d’un programme des études cohérent. [less ▲]

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See detailA splice-acceptor site variant in the bovine PIGH gene causes glycosylphosphatidyl inositol deficiency and lethal arthrogryposis syndrome.
Sartelet, Arnaud ULg; Li, Wanbo; Pailhoux Eric et al

in Bayrou, Calixte; Cabaraux, Jean-François; Delguste, Catherine (Eds.) et al Proccedings of the 3rd Scientific Meetingof the Faculty of Veterinary Medecine (2013, October 11)

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See detailLe « génie orienté produit » appliqué à l’élaboration de matrices poreuses pour l’ingénierie tissulaire.
de Bien, Charlotte ULg; Ounally, Thameur ULg; Collard, Valérie ULg et al

in Récents Progrès en Génie des Procédés (2013, October 08)

Ce travail vise à appliquer une approche « génie-orienté produit » à la fabrication de matrices poreuses synthétiques (scaffolds) susceptibles d’être utilisées en ingénierie tissulaire. Parmi les ... [more ▼]

Ce travail vise à appliquer une approche « génie-orienté produit » à la fabrication de matrices poreuses synthétiques (scaffolds) susceptibles d’être utilisées en ingénierie tissulaire. Parmi les différents polymères biosourcés et biodégradables déjà utilisés pour la fabrication de scaffolds, l’acide polylactique (PLA) a été choisi. Des matrices poreuses ont été obtenues par un procédé de moussage par lyophilisation puis leur microstructure 2D/3D a été caractérisée par microtomographie à rayons X avant d’être mise en lien avec les conditions d’élaboration testées. La diminution de la porosité ainsi que l’augmentation de l’épaisseur des parois avec l’augmentation de rapport polymère/solvant ont été confirmées. [less ▲]

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See detailSuitability of the soil map and legacy data in Wallonia (Belgium) to support the GlobalSoilMap initiative
Legrain, Xavier ULg; Bock, Laurent ULg; Colinet, Gilles ULg

in Arrouays, Dominique; McKenzie, Neil; Hempel, Jon (Eds.) et al GlobalSoilMap - Basis of the global spatial soil information system (2013, October 07)

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted ... [more ▼]

Belgium is covered with large-scale soil map and high density of historical profiles, now available in a numerical format. This papier first gives an overview of the soil properties which can be predicted from these documents, in combination with the legacy data, and of the uncertainty we can expect for now. The great potential of the soil map is highlighted, as well as its complexity. Example of the soil depth to rock points out the need of a thorough understanding of the soil map in order (i) to interpret correctly the information hidden behind each symbols or emerging from their combination and (ii) to take into account the sub-regional features. Expert knowledge seems essential, associated with historical and new hard data, in order to build a rich and confident map which respects the recommendations of the GlobalSoilMap.net project. [less ▲]

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See detailSizing models and performance analysis of waste heat recovery organic Rankine cycles for heavy duty trucks
Guillaume, Ludovic ULg; Legros, Arnaud ULg; Quoilin, Sylvain ULg et al

in Proceedings of the ASME ORC 2013 second international seminar on ORC power systems (2013, October 07)

This paper attempts to address this problematic of selecting the architecture, the expander and the working fluid for a waste heat recovery organic (or non-organic) Rankine cycle on a truck engine. It ... [more ▼]

This paper attempts to address this problematic of selecting the architecture, the expander and the working fluid for a waste heat recovery organic (or non-organic) Rankine cycle on a truck engine. It focuses especially on three expander technologies: the scroll, the piston and the screw expanders, and three working fluids: R245fa, ethanol and water. [less ▲]

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See detailAn observational asteroseismic study of the pulsating B-stars in the open cluster NGC 884
Saesen, S.; Briquet, Maryline ULg; Aerts, C. et al

in IAU Symposium No. 301 (2013), "Precision Asteroseismology" (Wroclaw), W. Chaplin, J. Guzik, G. Handler & A. Pigulski (eds.) (2013, October 01)

Recent progress in the seismic interpretation of field {\beta} Cep stars has resulted in improvements of the physical description in the stellar structure and evolution model computations of massive stars ... [more ▼]

Recent progress in the seismic interpretation of field {\beta} Cep stars has resulted in improvements of the physical description in the stellar structure and evolution model computations of massive stars. Further asteroseismic constraints can be obtained from studying ensembles of stars in a young open cluster, which all have similar age, distance and chemical composition. We present an observational asteroseismic study based on the discovery of numerous multi-periodic and mono-periodic B-stars in the open cluster NGC 884. Our study illustrates the current status of ensemble asteroseismology of a young open cluster. [less ▲]

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See detailBiolixiviação de cobre contido em placas de circuito impresso (pci) com micro-organismos mesófilos.
Rodrigues, M; Gaydardzhiev, Stoyan ULg; Lopes, K et al

in Silva, André Carlos; Silva, Elenice Maria Schons (Eds.) ANAIS PROCEEDINGS (2013, October)

This work investigated the bioleaching of electronic waste, specifically printed circuit boards (PCB). The bio-assisted leaching was carried out with At. ferrooxidans in shake flasks in order to evaluate ... [more ▼]

This work investigated the bioleaching of electronic waste, specifically printed circuit boards (PCB). The bio-assisted leaching was carried out with At. ferrooxidans in shake flasks in order to evaluate the influence of presence of microorganisms on the dissolution of metallic copper. The effects of the initial Fe2+ concentration and the presence of pyrite, as a source of iron, on copper dissolution were analyzed. The experiments were performed in an orbital shaker under the following conditions: 34°C, stirring speed of 150 min-1, particle size below 420μm and 0.5% solids percent (w/v). The results indicated high extraction, around 100%, and proved the feasibility of copper recovering from PCB through bioleaching. [less ▲]

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See detailHypoxia in the Black Sea northwestern shelf: From eutrophication to climatic stressors.
Capet, Arthur ULg; Beckers, Jean-Marie ULg; Grégoire, Marilaure ULg

in 40th CIESM congress proceedings (2013, October)

Abstract The dynamics of seasonal hypoxia, which affects the Black Sea north-western shelf since the mid 1970's until present days, is investigated by means of a 3D biogeochemical model. Comparison of the ... [more ▼]

Abstract The dynamics of seasonal hypoxia, which affects the Black Sea north-western shelf since the mid 1970's until present days, is investigated by means of a 3D biogeochemical model. Comparison of the model results with in -situ data reveals that the phenomenon may have been underestimated after the mid 1990's due to the distribution of observations. We investigate the mechanism of hypoxia at seasonal scale, and identify the main drivers of its interannual variability. While high nutrients discharge caused severe hypoxia in the 1980's, it was sustained in the 1990's by the pool of organic matter accumulated during the previous years in the sediments layer. With an increasing intensity, climatic stressors intensifies the response of hypoxia to nutrient discharge, and affect the seasonal dynamics of hypoxia by extending its temporal scale. [less ▲]

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See detailProceedings - Corporate Finance Day
Lambert, Marie ULg

in Proceedings - 11th Corporate Finance Day (2013, October)

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See detailDoes the surgical treatment for lumbar radiculopathy fulfil patients preoperative expectations?
Demoulin, Christophe ULg; Lakaye, M.; Martin, Didier ULg et al

in Abstract book of the 8th Interdisciplinary World Congress on Low Back and Pelvic Pain (2013, October)

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See detailDéveloppement d'un dispositif de trajectographie optique nécessaire pour la caractérisation expérimentale par une approche Euler-Lagrange des écoulements dans des bioréacteurs à cuve agitée
Collignon, Marie-Laure ULg; Delafosse, Angélique ULg; Delvigne, Frank ULg et al

in Récents Progrès en Génie des Procédés (2013, October)

Les bioréacteurs à cuve agitée sont des dispositifs largement utilisés dans l’industrie pharmaceutique. Les performances globales des cultures menées dans ces bioréacteurs dépendent fortement de ... [more ▼]

Les bioréacteurs à cuve agitée sont des dispositifs largement utilisés dans l’industrie pharmaceutique. Les performances globales des cultures menées dans ces bioréacteurs dépendent fortement de l’environnement physico-chimique et hydrodynamique local rencontré par les microorganismes et ce au cours du temps. Pour parvenir à caractériser cet historique de conditions locales rencontrées, une approche Euler-Lagrange doit être adoptée. La difficulté dans ce type d’approche est d’être capable de mesurer de manière fiable la trajectoire suivie par le microorganisme au sein du bioréacteur. Pour ce faire, le Laboratoire de Génie Chimique de l’Université de Liège a conçu un dispositif de trajectographie optique. L’objectif de cet article est de présenter ce dispositif, les développements qui ont été nécessaire à sa mise en œuvre et les résultats obtenus. Le dispositif se compose de deux caméras observant selon deux axes de l’espace un bioréacteur rétro-éclairé par des panneaux leds. La trajectoire suivie par une particule noire en gel d’alginate de calcium de 491 µm de diamètre est construite à partir des images acquises par ces deux caméras préalablement modélisée par un modèle pinhole et traitées par une approche rationnée. La validité des trajectoires mesurées a été prouvée dans un bioréacteur de 20 L mélangé par une hélice TTP en comparant les champs de vitesse moyen et d’énergie cinétique turbulent extraits de la trajectoire avec ceux obtenus par la technique eulérienne Stéréo P.I.V. La convergence de ces deux champs avec le temps d’acquisition de la trajectoire a également été démontrée. [less ▲]

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See detailUn dernier Poe
Durand, Pascal ULg

in Lefrère, Jean-Jacques; Pierssens, Michel (Eds.) Alcools. Actes du XVIe colloque des Invalides (2013, October)

Evocation et analyse du rituel du « Poe Toaster » (sur la tombe originelle de Poe au cimetière de Baltimore), suivies du point de vue porté par Mallarmé sur l'esthétique du monument érigé dans ce même ... [more ▼]

Evocation et analyse du rituel du « Poe Toaster » (sur la tombe originelle de Poe au cimetière de Baltimore), suivies du point de vue porté par Mallarmé sur l'esthétique du monument érigé dans ce même cimetière, en 1875, à la mémoire de l'auteur du « Corbeau ». [less ▲]

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See detailNetwork Fingerprinting: TTL-Based Router Signatures
Vanaubel, Yves ULg; Pansiot, Jean-Jacques; Mérindol, Pascal et al

in ACM/USENIX Internet Measurement Conference (2013, October)

Fingerprinting networking equipment has many potential applications and benefits in network management and security. More generally, it is useful for the understanding of network structures and their ... [more ▼]

Fingerprinting networking equipment has many potential applications and benefits in network management and security. More generally, it is useful for the understanding of network structures and their behaviors. In this paper, we describe a simple fingerprinting mechanism based on the initial TTL values used by routers to reply to various probing messages. We show that main classes obtained using this simple mechanism are meaningful to distinguish routers platforms. Besides, it comes at a very low additional cost compared to standard active topology discovery measurements. As a proof of concept, we apply our method to gain more insight on the behavior of MPLS routers and to, thus, more accurately quantify their visible/invisible deployment. [less ▲]

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See detailA Rapid Procedure for Estimating the Ability of Lock Gates to Withstand Ship Collisions
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in Proceedings of the PIANC Smart Rivers 2013 Conference (2013, October)

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See detailANAEROBIC DIGESTION WITH BIOHYDROGEN PRODUCTION FROM ORGANIC WASTES : STATE-OF-THE ART
Hiligsmann, Serge ULg; Beckers, L.; Hamilton, C. et al

in Proceedings Sardinia 2013 (2013, October)

Hydrogen (H2) is being considered as an ideal and clean energy carrier since the utilization of hydrogen, either via combustion or via fuel cells, results in pure water. However, currently its production ... [more ▼]

Hydrogen (H2) is being considered as an ideal and clean energy carrier since the utilization of hydrogen, either via combustion or via fuel cells, results in pure water. However, currently its production relies mainly (i.e. 95%) on fossil fuels. The recent advances to produce biohydrogen from renewable sources such as biomass and particularly by fermentation of carbohydrate-rich substrates from agriculture and agro-industries appear promising. Such a process called “dark fermentation” enables both organic waste treatment and renewable energy production to be coupled. The soluble metabolites, mainly acetate and butyrate, contained in the spent medium of the dark fermentation bioreactor may be efficiently converted to methane in a second anaerobic digester treating other carbon sources. The paper reviews the state-of-the art on the challenges and prospective applications of dark fermentation as a first step of anaerobic digestion of municipal solid wastes to produce H2 and CH4. [less ▲]

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See detailAre the back educational interventions effective for preventing low back pain
Demoulin, Christophe ULg; Marty, M.; Genevay, S. et al

in Abstract book of the 8th Interdisciplinary World Congress on Low Back and Pelvic Pain (2013, October)

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