References of "Scientific congresses and symposiums"
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See detailCardiac malformations in neonates born from mothers with gestational diabetes
Antole, Nathalie; Jacquemart, Caroline; GKIOUGKI, Evangelia ULg et al

Conference (2014, January)

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See detailMigrations congolaises (RDC) en Belgique et postcolonialismes
Demart, Sarah ULg

in La lutte contre les discriminations au regard de l’histoire et de la mémoire coloniales : état des lieux (2014, January)

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See detailMyocardial expression of cytokines influence postoperative outcome after cardiac surgery for congenital cardiac defects
Sprute, Johanna; Heying, Ruth; Buding, Brigitte et al

Conference (2014, January)

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See detailReading the decomposition chemistry of human remains with a new pair of glasses
Stefanuto, Pierre-Hugues ULg; Stadler, s; Perrault, K et al

in Hyphenated Techniques in Chromatography HTC-13 - Book of abstracts (2014, January)

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See detailSperm Motility and Lactate production at different sperm concentrations
Ponthier, Jérôme ULg; De Tullio, Pascal ULg; Blommaert, Didier ULg et al

in Journal of Equine Veterinary Science (2014, January), 34(1), 75-76

Lactate production is associated with total spermatozoa concentration. It negatively affects preservation of total and progressive motility, showing an effect of by-products of anaerobic metabolism on ... [more ▼]

Lactate production is associated with total spermatozoa concentration. It negatively affects preservation of total and progressive motility, showing an effect of by-products of anaerobic metabolism on long-term storage. Moreover, our data show that non-progressive motile spermatozoa are highly associated to lactate concentration, and thus, anaerobic glycolysis. More studies are required to determine relative contributions of aerobiosis and anaerobiosis to spermatozoa motility under different storage conditions. [less ▲]

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See detailEnhanced Multivariate Analysis of Mainstream Tobacco Smoke Particulate Phase by HS-SPME-GC×GC-TOFMS
Brokl, Michal ULg; Bishop, L; Wright, c et al

in Hyphenated Techniques in Chromatography HTC-13 - Book of abstracts (2014, January)

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See detailReading the decomposition chemistry of human remains with a new pair of glasses
Stefanuto, Pierre-Hugues ULg; Stadler, Sonja; Perrault, Katelynn et al

Conference (2014, January)

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See detailFast chromatographic method for explosives profiling
Stefanuto, Pierre-Hugues ULg; Perrault, K; Perrault, K et al

in Hyphenated Techniques in Chromatography HTC-13 - Book of abstracts (2014, January)

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See detailEdging towards better accounting
Schumesch, Patrice ULg

in Accounting and Business Magazine of the Association of Certified Chartered Accountants (2014, January)

The ACCA's International Public Sector Conference explored the direction of public sector reporting, and rebuilding public trust through improved financial reporting. Other speakers included Carla Moordy ... [more ▼]

The ACCA's International Public Sector Conference explored the direction of public sector reporting, and rebuilding public trust through improved financial reporting. Other speakers included Carla Moordy of Monitory UK, Zinga Venner of the World Bank, and Professor Michael Parker of Henley Business School. [less ▲]

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See detailUn approccio sociolinguistico allo studio dell’emigrazione campana in provincia di Liegi (Belgio)
Moreno, Paola ULg

in Di Salvo, Margherita; Moreno, Paola; Sornicola, Rosanna (Eds.) Multilinguismo in contesto migratorio. Metodologia e progetti di ricerca sulle dinamiche linguistiche degli italiani all'estero (2014, January)

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See detailUse of rotary atomiser to optimize retention on barley leaves while reducing driftable droplets
Ouled Taleb Salah, Sofiene ULg; Massinon, Mathieu ULg; Boukhalfa, Hassina dite Hafida ULg et al

in International Advances in Pesticide Application, Aspects of Applied Biology 122 (2014, January)

Controlled Droplet Application using rotary atomiser is based on an improved control of droplet size and trajectory comparatively to hydraulic nozzles. On the basis of literature, it was stated that the ... [more ▼]

Controlled Droplet Application using rotary atomiser is based on an improved control of droplet size and trajectory comparatively to hydraulic nozzles. On the basis of literature, it was stated that the use of 60° forward angled spray combined with the narrow drop size distribution of a rotary atomiser could lead to low drift and high retention on monocotyledonous and superhydrophobic weeds at early stage. A Micromax120 atomiser was tuned to emit 270 µm VMD, 60° angled forward, to increase interception by the canopy structure. A spray mixture containing a superspreader adjuvant was used to avoid drop bouncing. An increase of spray retention comparatively to a Teejet 11002 at 1.4 bars was observed, although not proved statistically significant by these preliminary trials. On the drift side, the tilted spinning disc seemed to be advantageous since droplet spectra contains a low percentage of droplets under 100 µm and presents an ejection velocity of 25 m.s-1 at 5000 RPM. The spray drift was reduced about 50%. However, these setting were not found as efficient as expected. Indeed, angled spray proved to be more sensitive to advection and turbulence, as the spray was more exposed to the airflow than for the vertical position. It appears that angling the spray and choosing a drop size spectrum with a Volume Median Diameter as big as 270 µm is not sufficient to reduce significantly this issue. Some alternatives as decreasing the emission height are possible with angled sprays but require height control that seems difficult to reach in practical situations. [less ▲]

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See detailGC×GC-TOFMS identification of new cadaveric VOCs
Pesesse, Romain ULg; Stefanuto, Pierre-Hugues ULg; Stadler, S et al

in Hyphenated Techniques in Chromatography HTC-13 - Book of abstracts (2014, January)

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See detailToward redesigning the relationship between farming systems and biodiversity conservation
Brédart, David ULg; Denayer, Dorothée ULg; Mormont, Marc ULg

in Proceedings of the 11th European IFSA Symposium. Farming systems facing global challenges: capacities and strategies. (2014)

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See detailHow can long-term experimental plots can help us to understand the sustainability of different phosphorus inputs ?
Renneson, Malorie ULg; dufey, Joseph; Roisin, Christian et al

Poster (2014)

During the last twenty years, we observed a constant reduction of mineral fertilizer use, due to prices increase and environmental awareness, and an increase of crop removal, leading to a phosphorus (P ... [more ▼]

During the last twenty years, we observed a constant reduction of mineral fertilizer use, due to prices increase and environmental awareness, and an increase of crop removal, leading to a phosphorus (P) budget decrease. These changes are feared for a decrease of soil P content, which is already observed in some regions in Wallonia. However, P being an essential element for plant growth, is a such management compatible with yield maintaining? Are the current cropping systems sustainable? To answer to the questions, different studies are made. However, long-term data are rarely available to understand the influence of cropping systems on the soil behavior, leaching risks or to choose adequate indicators of P. To answer to these questions in our soils, 2 experimental plots of the Walloon Agricultural Research Center. These experimental plots were established in 1967 and 1959 in order to evaluate the effect of, respectively, 3 P and K input levels and different organic inputs on the production. Soils samples were taken in plots and analyzed in laboratory. So, different P indicators and edaphic parameters were determined. This study showed that all indicators are coherent with P levels and correlated with yields but no many differences can be shown between fertilizer types. Meanly, zero P-input engenders a decrease of yield of 7%, while a double input increases yield of 2% in comparison to plots with an input corresponding to crop export. So, financially, the zero P-input option is rarely profitable in the long-term and double input of P removed is never financially sustainable. Leaching into deeper soils levels was studied with analysis of deeper horizons which indicated any leaching , even in plots with double inputs. Indeed, soil P contents in depth were similar in these plots than those with no P-inputs or soils under forest cover. So, to conclude, these plots help to study the sustainability of cropping systems in real situations and to determine appropriate management of P. [less ▲]

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See detailPt/C catalyst for PEM fuel cells: low pressure and low temperature plasma synthesis of Pt nanoparticles
Devant, Ludovic; Laurent-Brocq, Mathilde; Job, Nathalie ULg et al

Conference (2014)

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See detailTowards sustainable neighbourhoods: a new handbook and its application
Marique, Anne-Françoise ULg; Teller, Jacques ULg

in Marchettini, M; Brebbia, C.A.; Pulselli, R.M. (Eds.) The Sustainable City IX : Urban Regeneration and Sustainability (2014)

This paper presents a practical handbook that aims at helping local authorities and private developers to build and assess “sustainable neighbourhoods” in Wallonia (Belgium). This handbook was developed ... [more ▼]

This paper presents a practical handbook that aims at helping local authorities and private developers to build and assess “sustainable neighbourhoods” in Wallonia (Belgium). This handbook was developed by the Research Centre on Territorial, Urban and Rural Sciences (Lepur, University of Liège), at the request of the Walloon Minister of the Environment, Spatial Planning and Mobility. The concrete aim of the handbook is to concretely define the concept of "sustainable neighbourhood" by clearly tagging the minimum criteria that a real estate project must meet to obtain the “sustainable neighbourhood” label in Wallonia. It is a tool for decision support in the design as well as the evaluation of real estate projects, since the early stages of their design. The handbook is structured into 5 main theme and 25 criteria of sustainability. In a broad vision of sustainability, this handbook is not strictly limited to energy issues but considers "sustainability" in all its multiple components: location, network connection, mobility of inhabitants, use of natural resources, landscaping, waste management, diversity of function, social interactions, among others. The handbook is firstly presented and, then, applied to 12 recent case studies in order to identify common invariants in the design process of “sustainable neighbourhoods” and barriers to the integration of cross-cutting principles of sustainability in neighbourhood projects. Our main results namely show that the criteria dealing with energy performance of buildings and green spaces have percolated in many cases. However, the diversity of housing types, the accessibility to handicapped peoples, social diversity and participation issues remain poorly addressed in most of the cases studies. [less ▲]

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See detailLe goût amer du chocolat européen
Lebailly, Philippe ULg

Conference (2014)

La Directive 73/241 du 24 juillet 1973 avait été adoptée dans le cadre du droit communautaire alimentaire afin d'établir des règles communes pour la composition, les caractéristiques de fabrication,le ... [more ▼]

La Directive 73/241 du 24 juillet 1973 avait été adoptée dans le cadre du droit communautaire alimentaire afin d'établir des règles communes pour la composition, les caractéristiques de fabrication,le conditionnement et l'étiquetage des produits de cacao et de chocolat. Lors des discussions de la Directive, la possibilité d'une adjonction de matières grasses végétales (MGV) autres que celles contenues naturellement dans le cacao n'avait pas pu faire l'objet d'une entente entre les neuf états qui composaient alors la Communauté européenne. Avec l'arrivée de nouveaux Etats, le rapport de force s'est modifié et les négociations pour une révision de la Directive de 1973 ont été relancées en 1996. L'argument principal pour une harmonisation des législations faisait référence à la libre circulation des marchandises avec le Marché unique en faisant valoir que le maintien de normes différentes créait des obstacles aux échanges, cloisonnant le marché du chocolat dans l'Union Européenne. La question qui restait posée était d'autoriser ou pas les matières grasses végétales (MGV). Les plaidoyers en faveur du respect de la tradition et de la qualité et les intérêts des producteurs de cacao n'ont pas réussi à convaincre et la nouvelle réglementation communautaire du chocolat fait à l'évidence le bonheur des multinationales du secteur pour lesquelles son adoption a été une victoire : depuis le 23 juin 2000, la Directive 2000 / 36 abroge la directive de 1973 et permet d'utiliser d'autres MGV, moins chères que le beurre de cacao pour la fabrication du chocolat, dans la limite de 5 % du poids total du produit fini. En théorie, sont considérés comme MGV: l'illipé, l'huile de palme, le sal, le beurre de karité, le kogum gurgi et les noyaux de mangue. Dans les faits, c'est l'huile de palme qui est le produit de substitution. Dix ans après avoir autorisé l'incorporation d'huile de palme dans le chocolat, le consommateur européen découvre les méfaits de celle-ci sur la santé et l'environnement ! Un bien triste constat et ce d'autant que l'adoption de la Directive a privé les planteurs africains (l'offre de fèves de cacao est pour 70% d'origine africaine) d'un revenu bien nécessaire pour lutter contre la pauvreté en zone rurale. [less ▲]

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See detailImpact de l’érosion littorale sur les migrations forcées. Cas de Cotonou, Bénin.
Ozer, Pierre ULg; Hountondji, Yvon-Carmen; Bessan, Modestine Victoire et al

in Ozer, André; Ozer, Pierre (Eds.) Colloque International "La Géographie Physique et les Risques Naturels" - Livre de résumés (2014)

En utilisant la fonction multi dates disponible dans Google Earth, cet article estime la superficie érodée à Cotonou entre 2002 et 2011 à l’est de l’exutoire du Lac Nokoué. En outre, il évalue le nombre ... [more ▼]

En utilisant la fonction multi dates disponible dans Google Earth, cet article estime la superficie érodée à Cotonou entre 2002 et 2011 à l’est de l’exutoire du Lac Nokoué. En outre, il évalue le nombre de maisons détruites ainsi que le nombre de personnes contraintes à une migration forcée. Les figures sont importantes puisque de l’ordre de cent mètres de zone côtière ont totalement disparu en une décennie sur un tronçon de près de six kilomètres de long en pleine ville ou en proche périphérie. [less ▲]

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See detailLa contribution des lobes frontaux au fonctionnement exécutif
Collette, Fabienne ULg

Conference (2014)

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See detailPerformance et expérience esthétique : le régime contemporain (Rancière)
Hagelstein, Maud ULg

Conference (2014)

Le cadre de ce colloque repose sur le constat de la perte d’intensité de l’ancien système des Beaux-Arts ou en tout cas sur l’idée de sa réévaluation contemporaine – opérée à partir d’une attention accrue ... [more ▼]

Le cadre de ce colloque repose sur le constat de la perte d’intensité de l’ancien système des Beaux-Arts ou en tout cas sur l’idée de sa réévaluation contemporaine – opérée à partir d’une attention accrue à l’hétérogénéité des pratiques artistiques. Pourquoi mobiliser ici la figure de Rancière ? Pour la raison suivante : c’est l’un des philosophes actuels qui s’est encore donné la peine d’essayer de théoriser de manière inédite (et non moderniste ) la fin du régime traditionnel des Beaux-Arts (2ème régime). Les trois grands régimes de l’art sont chez Rancière des régimes de perception, d’identification et d’interprétation de l’art – c’est-à-dire des ensembles déterminés (culturellement et même historiquement déterminés – semble-t-il ) d’habitudes perceptives, de moyens pratiques et d’outils théoriques permettant de délimiter le champ des objets et/ou expériences artistiques. Le régime qui a contribué à engager une rupture irréversible avec le système traditionnel des Beaux-Arts (à savoir : le régime esthétique de l’art – qui affecte a priori les expériences artistiques contemporaines) se caractérise essentiellement chez Rancière par deux mouvements : (1) effacement des spécificités des arts (au profit d’une expérience sensible commune à tous les arts – qu’il faudra définir) ; (2) effacement des frontières qui séparent l’art de l’expérience ordinaire. [less ▲]

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See detailLes récits numériques : de nouvelles formes narratives ?
Hurel, Pierre-Yves ULg

in L'espace de publication de Culture Numérique (2014)

Face aux discours techno-enthousiastes sur les innovations des récits numériques, des études de l’hyperfiction cherchent à définir les nouveautés réelles apportées par le média informatique. Cet article ... [more ▼]

Face aux discours techno-enthousiastes sur les innovations des récits numériques, des études de l’hyperfiction cherchent à définir les nouveautés réelles apportées par le média informatique. Cet article s’inscrit dans ce courant en comparant les récits interactifs numériques aux non-numériques, tels que les jeux de rôle, le théâtre expérimental ou les livres dont vous êtes le héros. Cette comparaison se fait en deux temps : d’abord le rapprochement par les caractéristiques narratives, puis la distinction par les spécificités des supports. Elle nuance le caractère nouveau de l’arborescence, de l’émergence, de l’hybridation de l’avatar et de spatialité ; et cherche à déterminer des caractéristiques propres au numérique. [less ▲]

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See detailBioactive Intraocular Lens – A Strategy to Control Secondary Cataract
Huang, Yi-Shiang ULg; Bertrand, Virginie ULg; Bozukova, Dimitriya et al

in IFMBE Proceedings (2014), 41

Cataract is the opacity of the lens, causing impairment of vision or even blindness. Today, a surgery is still the only available treatment. The intraocular lens (IOL) is a polymer implant designed to ... [more ▼]

Cataract is the opacity of the lens, causing impairment of vision or even blindness. Today, a surgery is still the only available treatment. The intraocular lens (IOL) is a polymer implant designed to replace the natural lens in the cataract surgery. However, the bioinert materials could not satisfy the unmet need in the secondary cataract control. Posterior capsular opacification (PCO, or Secondary Cataract), characterized by a thick and cloudy layer of lens epithelial cells (LECs), is the most common postoperative complication. In our research, a bioactive molecule is immobilized onto the conventional acrylic hydrophilic polymer pHEMA (Poly(2-hydroxyethyl methacrylate)) using oxygen plasma treatment followed by deposition. The RGD peptide sequence, being well-known for its ability to promote cellular attachment by binding to integrin receptors, is designed to stimulate the adhesion of LECs on the IOL. Our data show the peptide immobilized biomaterial not only exhibits similar optical property, but also reveals enhanced biological properties in cell adhesion and cell morphology maintenance. By means of surface functionalization of IOL to stimulate LECs adhesion, the secondary cataract could be controlled. [less ▲]

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See detailMetabolic cerebral correlates of conjunctive and relational memory in Alzheimer's disease
Bastin, Christine ULg; Bahri, Mohamed Ali ULg; Collette, Fabienne ULg et al

Poster (2014)

Introduction. Memory deficits are the clinical hallmark of typical Alzheimer’s disease. The precise nature of these deficits however remains to be fully characterized. In this study, we investigated ... [more ▼]

Introduction. Memory deficits are the clinical hallmark of typical Alzheimer’s disease. The precise nature of these deficits however remains to be fully characterized. In this study, we investigated binding in long-term episodic memory. Relational binding processes in memory create an associative link between independent items or between items and context into episodic memories (Cohen et al., 1999). An alternative process, conjunctive binding, allows associations to be encoded as a united representation of features into a single entity (O'Reilly and Rudy, 2001; Mayes et al., 2007). The current study (1) assessed whether Alzheimer’s disease disrupt both conjunctive and relational memory, and (2) related patients’ memory performance to cerebral metabolism. Methods. Thirty patients with mild Alzheimer’s disease and 24 healthy older adults performed a source memory task where items were associated to a background color (Diana et al., 2008, 2010). In one condition, relational binding was promoted by the instruction to associate the item with another object of the same color as the background. In the other condition, color had to be integrated as an item feature (conjunctive binding). Patients’ brain metabolic activity at rest (FDG-PET) was analysed with spatio-temporal Partial Least Squares (McIntosh et al., 1996) in order to assess the relation of behavioral performance and activity in functional cerebral networks. Results. Alzheimer’s disease patients had an impaired capacity to remember item-color associations, with deficits in both relational and conjunctive memory. However, performance in the two kinds of associative memory varied independently across patients. Partial least square analyses revealed a significant pattern of metabolic activity that correlated specifically with each condition (accounting for 76.48 % of the covariance in the data; p< .05). More specifically, poor conjunctive memory was related to hypometabolism in an anterior temporal-posterior fusiform brain network, whereas relational memory correlated with metabolism in regions of the default mode network. Conclusions. These findings support the hypothesis of distinct neural systems specialized in different types of associative memory and point to heterogeneous profiles of memory alteration in Alzheimer’s disease as a function of damage to the respective neural networks. [less ▲]

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See detailFacteurs de risque de chute chez des sujets résidant en maison de repos : étude prospective d'une durée de 2 ans
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 164-165

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See detailNanocomposite fiber reinforced mortars
Coppola, Bartolomeo; Di Maio, Luciano; Courard, Luc ULg et al

in Proceedings of the International Conference on Composites/Nano Engineering (2014)

The use of fibers to reinforce a brittle material is an extensively studied application. In the field of cementitious materials a wide range of fibers have been investigated, from natural to synthetic ... [more ▼]

The use of fibers to reinforce a brittle material is an extensively studied application. In the field of cementitious materials a wide range of fibers have been investigated, from natural to synthetic fiber (wood, cellulose, carbon, glass, polypropylene) in order to achieve several purposes. Nowadays there is a continuing effort to take advantage of recent advances in nanotechnology, in the polymer and fiber industry. Nanoclays are some of the most affordable materials that have shown promising results in nanocomposite polymers. They are characterized by a “platelet” structure with average dimension of 1 nm thick and 70 to 150 nm wide. This work is aimed at studying the different behavior of fiber reinforced mortars, containing nanocomposite polymeric fibers. [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 detailAxisymmetric transient modelling of a suction caisson in dense sand
Cerfontaine, Benjamin ULg; Levasseur, Séverine ULg; Collin, Frédéric ULg et al

in Hicks, Michael A.; Brinkgreve, Ronald, B.J.; Rohe, Alexander (Eds.) Numerical Methods in Geotechnical Engineering (2014)

Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation ... [more ▼]

Suction caisson are hollow cylinders open towards the bottom that are currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is currently used for the modelling of their cyclic behaviour. It’s able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully- coupled transient axisymmetric analysis of a suction caisson is carried out. A vertical pseudo-random loading is transformed into equivalent ones. Comparison of the permanent displacement accumulated shows a good agreement between them. The influence of the interface conditions is also addressed. For low tension amplitude applied to the caisson, it can be modelled as “stuck” to the inner soil. However higher amplitude might lead to a total unplugging. [less ▲]

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See detailThe Mass Distribution of sdB Stars Derived by Asteroseismology and Other Means: Implications for Stellar Evolution Theory
Van Grootel, Valérie ULg; Charpinet, Stéphane; Fontaine, Gilles et al

in Astronomical Society of the Pacific Conference Series (2014), 481

Understanding the formation of sdB stars is one of the remaining challenges of stellar evolution theory. Competing scenarios have been proposed to account for the existence of such evolved objects. They ... [more ▼]

Understanding the formation of sdB stars is one of the remaining challenges of stellar evolution theory. Competing scenarios have been proposed to account for the existence of such evolved objects. They give quite different mass distributions for resulting sdB stars. Detailed asteroseismic analyses, including mass estimates, of 15 pulsating hot B subdwarfs have been published in the past decade. Masses have also been reliably determined by light curve modeling and spectroscopy for 7 sdB components of eclipsing or reflection binaries. We present here the empirical mass distribution of sdB stars on the basis of these samples. Implications are also briefly discussed. [less ▲]

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See detailAnalytic Model for The Motion About An Oblate Planet in The Presence Atmospheric Drag
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Advances in The Astronautical Sciences (2014)

The paper introduces a new model for the motion about an oblate planet under the influence of the atmospheric drag. Both qualitative and quantitative insights are revealed, as well as closed-form ... [more ▼]

The paper introduces a new model for the motion about an oblate planet under the influence of the atmospheric drag. Both qualitative and quantitative insights are revealed, as well as closed-form equations of motion. The main tool consists in averaging the effects of both perturbations (oblateness and drag), and deriving the variational equations for the vectorial orbital elements. The model is singularity-free and may serve as an initial guess for control problems, as well as an analytic propagator. [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 detailRisk factors for falls among elderly nursing home residents: a 2-year prospective study
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Osteoporosis International (2014), 25(2), 36-37

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See detailDEM time series of an agricultural watershed
Pineux, Nathalie ULg; Lisein, Jonathan ULg; Swerts, Gilles ULg et al

in Geophysical Research Abstracts (2014), 16

the field data come from plot scale studies, the watershed scale seems to be more appropriate to understand them. Currently, small unmanned aircraft systems and images treatments are improving. In this ... [more ▼]

the field data come from plot scale studies, the watershed scale seems to be more appropriate to understand them. Currently, small unmanned aircraft systems and images treatments are improving. In this way, 3D models are built from multiple covering shots. When techniques for large areas would be to expensive for a watershed level study or techniques for small areas would be too time consumer, the unmanned aerial system seems to be a promising solution to quantify the erosion and deposition patterns. The increasing technical improvements in this growth field allow us to obtain a really good quality of data and a very high spatial resolution with a high Z accuracy. In the center of Belgium, we equipped an agricultural watershed of 124 ha. For three years (2011-2013), we have been monitoring weather (including rainfall erosivity using a spectropluviograph), discharge at three different locations, sediment in runoff water, and watershed microtopography through unmanned airborne imagery (Gatewing X100). We also collected all available historical data to try to capture the “long-term” changes in watershed morphology during the last decades: old topography maps, soil historical descriptions, etc. An erosion model (LANDSOIL) is also used to assess the evolution of the relief. Short-term evolution of the surface are now observed through flights done at 200m height. The pictures are taken with a side overlap equal to 80%. To precisely georeference the DEM produced, ground control points are placed on the study site and surveyed using a Leica GPS1200 (accuracy of 1cm for x and y coordinates and 1.5cm for the z coordinate). Flights are done each year in December to have an as bare as possible ground surface. Specific treatments are developed to counteract vegetation effect because it is know as key sources of error in the DEM produced by small unmanned aircraft systems. The poster will present the older and more recent changes of relief in this intensely exploited watershed and notably show how unmanned airborne imagery might be of help in DEM dynamic modelling to support soil conservation research. [less ▲]

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See detailA bi-objective optimization model for a bimodal network of oil transportation
Belaid, Emna ULg; Saadi, Ismaïl ULg; Rigo, Philippe ULg et al

Conference (2014)

Transportation of oil requires attention for a variety of reasons, the most important being the external costs caused by adverse events. These adverse events affect not only the environment costs but also ... [more ▼]

Transportation of oil requires attention for a variety of reasons, the most important being the external costs caused by adverse events. These adverse events affect not only the environment costs but also the societal costs. In this paper, a bi-objective optimization model for a bimodal network of oil transportation is presented. The paper discusses a mathematical model that takes into account two main decision criteria, namely cost and safety. A linear programming model is presented, in which the focus is laid on the different elements that affect the performance of the bi-modal transportation chain of oil. The disturbing elements that are considered include technical failures, road conditions and vandalism acts. Thus, in this study, it is investigated how the bimodal network must be designed to avoid adverse effects caused by these disturbing elements. The goal of the approach is to maximize safety and minimize costs. Data from a real life example (i.e. the Tunisian national oil company) will be used to calibrate the model. [less ▲]

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See detailVertical transient loading of a suction caisson in dense sand
Cerfontaine, Benjamin ULg; Collin, Frédéric ULg; Charlier, Robert ULg

in Cerfontaine, Benjamin; Collin, Frédéric; Charlier, Robert (Eds.) 14th International Conference of the International Association for Computer Methods and Avances in Geomechanics (2014)

Suction caissons are hollow cylinders open towards the bottom currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for ... [more ▼]

Suction caissons are hollow cylinders open towards the bottom currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is adapted for the modelling of their cyclic behaviour. It is able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully-coupled transient axisymmetric analysis of a suction caisson is carried out. The monotonic partially drained behaviour of the caisson is firstly highlighted. Afterwards, pseudo-random and sinusoidal-equivalent storm signals are compared. Permanent displacements accumulated at the end of the storm show a good agreement between them but are slightly divergent, which indicates that the position of the extreme event might be a relevant issue. [less ▲]

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See detailEfficient method for a controlled deposition of Pd nanoparticles on a glassy carbon electrode
Olu, Pierre-Yves; Chatenet, Marian; Job, Nathalie ULg

Poster (2014)

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See detailMise en ligne, mise à jour et mise en réseau du Französisches Etymologisches Wörterbuch
Renders, Pascale ULg

in Trotter, David; Bozzi, Andrea; Fairon, Cédrick (Eds.) Actes du XXVIIe Congrès international de linguistique et de philologie romanes (Nancy, 15-20 juillet 2013). Section 16 : Projets en cours; ressources et outils nouveaux (2014)

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See detailEfficient estimation of the high-order response statistics of a wind-excited oscillator with nonlinear velocity feedback
Denoël, Vincent ULg; Carassale, Luigi

in Proceedings of the XIII Conference of the Italian Association for Wind engineering (2014)

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See detailLes copies de la "Cène" de Léonard de Vinci
Fagnart, Laure ULg

in Mounier, Pascal; Nativel, Colette (Eds.) Copier et contrefaire à la Renaissance. Faux et usage de faux. Actes du colloque organisé par R.H.R. et la S.F.D.E.S. (2014)

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See detailThermoCycle: A Modelica library for the simulation of thermodynamic systems
Quoilin, Sylvain ULg; Desideri, Adriano ULg; Wronski, Jorrit et al

in Proceedings of the 10th International Modelica Conference 2014 (2014)

This paper presents the results of an on-going project to develop ThermoCycle, an open Modelica library for the simulation of low-capacity thermodynamic cycles and thermal systems. Special attention is ... [more ▼]

This paper presents the results of an on-going project to develop ThermoCycle, an open Modelica library for the simulation of low-capacity thermodynamic cycles and thermal systems. Special attention is paid to robustness and simulation speed since dynamic simulations are often limited by numerical constraints and failures, either during initialization or during integration. Furthermore, the use of complex equations of state (EOS) to compute thermodynamic properties significantly decreases the simulation speed. In this paper, the approach adopted in the library to overcome these challenges is presented and discussed. [less ▲]

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See detailLe Candide anglois: un cas complexe de "palimpseste"
Tilkin, Françoise ULg

in Cronk, Nicholas; Ferrand, Nathalie (Eds.) Les 250 ans de Candide. Lectures et relectures (2014)

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See detailQuality of life benefits of knee arthroplasty for osteoarthritis
NEUPREZ, Audrey ULg; François, Garance ULg; KURTH, William ULg et al

in Osteoporosis International (2014), 25(2), 40

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See detailLe "basileion", les reines et Actium
Veymiers, Richard ULg

in Bricault, Laurent; Versluys, Miguel John (Eds.) Power, Politics and the Cults of Isis. Proceedings of the Vth International Conference of Isis Studies, Boulogne-sur-Mer, October 13-15 2011 (2014)

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See detailEight years of denosumab treatment in postmenopausal women with osteoporosis: results from the first five years of the freedom extension
Papapoulos, S; Lippuner, K; Roux, C et al

in Osteoporosis International (2014), 25(2), 46-47

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See detailImpacts des récentes variations pluviométriques sur le droit du sol, l’accès a l’eau et l’agriculture en Mauritanie : l’exemple du lac de Mâle
Gassani, Jean; De Longueville, Florence ULg; Gemenne, François ULg et al

in Camberlin, Pierre; Richard, Yves (Eds.) Actes du 27e Colloque International de l'Association Internationale de Climatologie (2014)

The Islamic Republic of Mauritania is at a socio-political crossroads in its history. Environmental crises coupled with the transformation of economic activities and population pressures disrupt social ... [more ▼]

The Islamic Republic of Mauritania is at a socio-political crossroads in its history. Environmental crises coupled with the transformation of economic activities and population pressures disrupt social structures of the country. The drought that began in 1970 has transformed the nomadic lifestyle, forcing them to settle. This deeply changed tribes’ perception access to land and water resources, and has led to increased pressure on the Haratines (former black slaves) in agricultural production. With the release of human rights, the enactment of a land law, and taking into account the Sharia, former slaves claimed their ownership of the land they cultivated. The refusal of the latter to access their application, the Haratines headed for land undeveloped and interfered in the customary practice of the management of water catchments. The latent conflict escalated into open in the watershed of Lake Mâle. Today, the situation does not improve since the political will collides with local tribal authorities. [less ▲]

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See detailLe devoir de confidentialité des institutions d'arbitrage
Kohl, Benoît ULg

Conference (2014)

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See detailShape Optimization of Interior Permanent Magnet Motor for Torque Ripple Reduction
Kuci, Erin ULg; Geuzaine, Christophe ULg; Dular, Patrick ULg et al

in Proceedings of The 4th International Conference on Engineering Optimization: Lisbon (Portugal), 8-11 September 2014 (2014)

The objective of the paper is to present an open source environment to perform the design, simulation (Gmsh, GetDP) and optimization (OpenOpt) of electrical machines. The design of the permanent magnets ... [more ▼]

The objective of the paper is to present an open source environment to perform the design, simulation (Gmsh, GetDP) and optimization (OpenOpt) of electrical machines. The design of the permanent magnets of a v-shaped interior permanent magnet machine is then considered. The later is modeled using the finite element method with a formulation based on the magnetic vector potential. Optimization is based on mathematical programming approach. A semi-analytical sensitivity analysis is compared with the finite difference. Thanks to this approach, the design time is much shorter than that required by an approach of trial and error used by industry. The reduction of the torque ripple is about 70 \% with respect to the original design. [less ▲]

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See detailFacteurs pronostiques de décès chez des sujets résidant en maison de repos suivis d'une manière prospective pendant une période de 2 ans
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 73-74

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See detailMultiscale aspects in modeling percussive drilling: from wave propagation to rigid body dynamics
Depouhon, Alexandre ULg; Denoël, Vincent ULg; Detournay, Emmanuel

in Proceedings of the 3rd International Colloquium on Nonlinear Dynamics and Control of Deep Drilling Systems (2014)

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See detailEconomic evaluation of an osteoporosis screening campaign: using FRAX as a prescreening tool
Hiligsmann, Mickaël ULg; Ben Sedrine, Wafa ULg; Bruyère, Olivier ULg et al

in Osteoporosis International (2014), 25(2), 38-39

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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 detailMicrostructures and Mechanical Properties of Stainless Steel AISI 316L Processed by Selective Laser Melting
Mertens, Anne ULg; Reginster, Sylvie ULg; Contrepois, Quentin et al

in Materials Science Forum (2014), 783-786 (2014)

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The ... [more ▼]

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The resulting microstructures have been characterised in details in order to reach a better understanding of the solidification and consolidation processes. The influence of the processing parameters on the mechanical properties was investigated by means of uniaxial tensile testing performed on samples produced with different main orientations with respect to the building direction. A strong anisotropy of the mechanical behaviour was thus interpreted in relation with the microstructures and the processing conditions. [less ▲]

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See detailStrontium ranelate decreases the number of rapid radiological progressors from the first year in SEKOIA study
Chevalier, X; Richette, P; Bruyère, Olivier ULg et al

in Osteoarthritis and Cartilage (2014), 22(1), 461

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See detailCould internet use be promising in health prevention and promotion in menopausal women ? A preliminary report
Slomian, Justine ULg; Streel, Sylvie ULg; Appleboom, G et al

in Osteoporosis International (2014), 25(2), 309

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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 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 detailPatch repair: compatibility issues
Garbacz, Andrzej; Courard, Luc ULg; Bissonnette, Benoît et al

in Grantham, Michael (Ed.) Proceedings of the 5th International Conference on Concrete Repair (2014)

Repair of any concrete structure results in formation of complex, at least two-component repair systems. Compatibility approach is treated as a basic requirement during selection of repair material ... [more ▼]

Repair of any concrete structure results in formation of complex, at least two-component repair systems. Compatibility approach is treated as a basic requirement during selection of repair material. Recently, the understanding for compatibility requirements in repair systems approach is demonstrated in many papers. The aim of this paper is analyzing the compatibility between repair materials and concrete substrate in the case of patch repair. The compatibility issues were discussed in light of the various requirements which determine the mathematical space of loads, including chemical, mechanical and other physical (mainly thermal) loads. N-dimensional compatibility space is created, taking into account selected patch material control parameters. The requirements for good compatibility between repair material and concrete substrate can be formulated by using mathematical inequalities, where the variables are the material control parameters. The effects of properties of the both repair material and concrete substrate were analyzed using computer system ANCOMP developed at Warsaw University of Technology. Usability of this approach was demonstrated using selected case study as an example. [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 detailA specific example of exchange: the national churches and their corresponding "nations"
Corswarem, Emilie ULg; Berti, Michela

Conference (2014)

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See detailEtat du droit belge avant la tempête Salduz
Jacobs, Ann ULg

in Jacobs, Ann; Fourment, Françoios (Eds.) La garde à vue. Regards croisés belges, français et européens (2014)

Etat de la législation belge en ce qui concerne l'assistance de l'avocat lors des premiers interrogatoires avant la jurisprudence et la la loi Salduz.

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See detailPrior light history impacts on higher order cognitive brain function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Meyer, Christelle ULg et al

Conference (2014)

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See detailEnseignant de langues : de l’homme-orchestre au chef d’orchestre. Etat des lieux d’une discipline et d’une profession en questionnement
Defays, Jean-Marc ULg

in Maurer, Marie-Thérèse (Ed.) « L’enseignant au sein du dispositif d’enseignement/ apprentissage de la langue étrangère », Actes du Ve de l’Association des Directeurs de Centres Universitaires d’Etudes Françaises pour Etrangers (ADCUEFE), Université de Bourgogne, Dijon, 27-28 mai 2011 (2014)

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See detailImpact de la musculation sur la performance en natation
Jidovtseff, Boris ULg

Conference (2014)

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See detailFurther reduction in nonvertebral fracture rate is observed following 3 years of denosumab treatment: results with up to 7 years in the freedom extension
Ferrari, S; Adachi, JD; Lippuner, K et al

in Osteoporosis International (2014), 25(2), 56

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See detailFirst assessment of the impacts of Saharan dust events on the respiratory health in West Africa: A case study in the Northern Benin
De Longueville, Florence ULg; Henry, Sabine; Ozer, Pierre ULg

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

More than 50% of the global dust emitted into the atmosphere comes from the Sahara. About 60% of the Saharan dust move southwards to the Gulf of Guinea (Engelstaedter et al., 2006). Once in the air, these ... [more ▼]

More than 50% of the global dust emitted into the atmosphere comes from the Sahara. About 60% of the Saharan dust move southwards to the Gulf of Guinea (Engelstaedter et al., 2006). Once in the air, these dust contribute to increase the concentrations of particles smaller than 10 microns (PM10), which are respirable particles (Ozer et al. 2005). A number of adverse health effects have been associated with desert dust, including respiratory diseases (Goudie, 2014). [...] [less ▲]

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See detailOn Interpreting g-Mode Period Spacings in sdB Stars
Charpinet, Stéphane; Brassard, Pierre; Van Grootel, Valérie ULg et al

in Astronomical Society of the Pacific Conference Series (2014), 481

Long period B subdwarf (sdB) pulsators, when observed from space with the satellites CoRoT and Kepler, show particularly rich g-mode oscillation spectra with often hundreds of frequencies. In many of ... [more ▼]

Long period B subdwarf (sdB) pulsators, when observed from space with the satellites CoRoT and Kepler, show particularly rich g-mode oscillation spectra with often hundreds of frequencies. In many of these pulsation spectra, regularities in the observed period distributions typical of high order g-modes in chemically homogeneous stars have been reported. This led to a claim that sdB stars could be much less chemically stratified than previously thought. In this paper, we show that such an interpretation is unfounded. We reinvestigate trapping effects on g-modes in sdB stars in view of current observations and show that ”standard” stratified models can also produce nearly quasi-constant period spacings in the low frequency range which are comparable to those observed in the g-mode spectra of these stars. [less ▲]

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See detailRobust optimal rendezvous using differential drag
Dell'Elce, Lamberto ULg; Martinusi, Vladimir ULg; Kerschen, Gaëtan ULg

in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference (2014)

The practical realization of the differential drag technique for orbital relative maneuvers must cope with the several and severe uncertainty sources affecting drag modeling. Neglecting these ... [more ▼]

The practical realization of the differential drag technique for orbital relative maneuvers must cope with the several and severe uncertainty sources affecting drag modeling. Neglecting these uncertainties might yield to oversimplified solutions whose representation of a real-life scenario is questionable. The first outcome of this study consists in the synthesis of a robust optimal controller which combines differential flatness theory and the scenario approach to generate a reference path which can be easily followed. The second outcome is the characterization of the relevant uncertainties of the differential drag problem, with a special focus on the aerodynamic force. The developments are validated in a highly detailed simulation environment including, among the perturbations, advanced drag modeling and coupled attitude and orbital dynamics. [less ▲]

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See detailSpectroscopic analysis of the remorin-lipid interactions at the moleculaer level
Nasir, Mehmet Nail ULg; Perraki, Artemis; Mongrand, Sébastien et al

Poster (2014)

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See detailÉvolution récente des précipitations de mars-mai en Afrique de l'Est: configurations spatiales et évolution sub-saisonnière
Philippon, Nathalie; Camberlin, Pierre; Moron, Vincent et al

in Camberlin, Pierre; Richard, Yves (Eds.) Actes du 27e Colloque International de l'Association Internationale de Climatologie (2014)

Using raingauge daily rainfall data documenting the Horn of Africa and the Long Rains over the period 1961-2012, the aim of this study is three-fold:1/ confirming the drying trend detected by Lyon et ... [more ▼]

Using raingauge daily rainfall data documenting the Horn of Africa and the Long Rains over the period 1961-2012, the aim of this study is three-fold:1/ confirming the drying trend detected by Lyon et DeWitt (2012) during the Long Rains using gridded rainfall, 2/ understanding how this drying is expressed at the intraannual time scale using the sub-seasonal scenario approach developed by Moron et al. (2013) and 3/ assess its impact on vegetation. A drying is actually measured using raingauge data but is less severe than the one measured using gridded data. It is the strongest at the driest stations and during the rainfall climatological peak (April). It seems to be associated with a higher frequency of the dry subseasonal scenarios i.e. characterized by negative rainfall anomalies through the whole or the core of the seasonal cycle. But we don't observe yet a diminution of the vegetation photosynthetic activity in response to the rainfall decrease. To the contrary, the Rainfall Use Efficiency (RUE) displays a slightly positive trend. [less ▲]

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See detailComment appréhender la complexité inhérente aux compétences ?
Georges, François ULg; Tardif, Jacques; Poumay, Marianne ULg

Conference (2014)

La compétence est complexe. À l’instar d’un cube qui ne donne accès simultanément qu’à trois de ses faces, la compétence ne laisse transparaître que certaines combinaisons de ressources. Afin d’examiner ... [more ▼]

La compétence est complexe. À l’instar d’un cube qui ne donne accès simultanément qu’à trois de ses faces, la compétence ne laisse transparaître que certaines combinaisons de ressources. Afin d’examiner les autres ressources combinées, il convient de changer de point de vue. Dans cette présentation, nous proposons une typologie des portes d’entrée utilisées par les apprenants pour rendre compte de leurs compétences. De cette analyse, nous suggérons des angles de vue qui guident l’apprenant dans le choix de portes d’entrée complémentaires de sorte que les points de vue variés assurent la prise en compte de la compétence dans toute sa complexité. Sur base de cette démarche exploratoire, nous proposons des pistes pour porter un jugement valide sur le développement des compétences. [less ▲]

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See detailImpact of components of the metabolic syndrome on progression of knee osteoarthritis in the SEKOIA study
Edwards, MH; Parsons, C; Eymard, F et al

in Rheumatology (2014), 53(1), 31

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See detailL'élevage des ruminants, un élément clé de notre territoire
Hautier, Louis; Campion, Morgane; Ninane, Maxime ULg et al

in Centre wallon de Recherches agronomiques (Ed.) 19ème Carrefour des Productions Animales "La viande bovine remise en question : de sa production à sa consommation", Gembloux, le 19 février 2014 (2014)

Parallèlement à l'extension de l'agriculture, l'élevage s'est développé pour la fourniture de produits alimentaires (lait, viande) et non alimentaires (cuir, laine) mais également par l'apport de la ... [more ▼]

Parallèlement à l'extension de l'agriculture, l'élevage s'est développé pour la fourniture de produits alimentaires (lait, viande) et non alimentaires (cuir, laine) mais également par l'apport de la traction animale aux agriculteurs et la restitution d'éléments fertilisants. Ceci a notamment contribué, dans nos régions, au développement du système à jachère et culture attelée. Au cours des dernières décennies, l'agriculture s'est fortement intensifiée grâce à l'énergie fossile utilisée pour la production d'intrants, de concentrés, la mécanisation et le transport des produits alimentaires. Cette intensification de l'agriculture au niveau mondial a conduit à la spécialisation des exploitations avec une dissociation de l'élevage et de la culture en bassins de production avec des conséquences très dommageables sur l'environnement. De nos jours, les productions bovines représentent 54 % des principales orientations technico-économiques en Wallonie, selon la nouvelle classification européenne (OTEX). L'élevage bovin en production est composé de 500 601 têtes : 41 % de laitières et 59 % d'allaitantes. Il est fortement basé sur la valorisation des prairies permanentes qui occupent plus de 45 % de la surface agricole utile et concerne plus de 86 % des exploitations agricoles wallonnes sur les 13 301 recensées en 2012.Toutefois, l'élevage est de plus en plus critiqué par la société à cause de ses impacts négatifs sur l'environnement et de considérations liées au bien-être animal.De plus, dans certaines exploitations, mise en concurrence des zones de grandes cultures avec les zones herbagères pour la production de lait et viande, difficultés et contraintes du métier d'éleveur. L'arrêt de cette activité pose la question du devenir de la surface agricole qui lui était allouée. Dans ce contexte, il paraît important de passer ici en revue les principaux services liés à l'élevage de ruminants en Wallonie afin d'identifier par la suite les conditions qui permettent l'optimisation de ces derniers tout en limitant les nuisances connexes et ceci dans le but d'objectiver la situation. [less ▲]

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See detailMeteorological variation in travel behaviour
Creemers, Lieve; Wets, Geert; Cools, Mario ULg

Conference (2014)

Weather causes a variety of impacts on the transportation system. This paper contributes to the weather-related transport literature by investigating the meteorological variation in revealed preference ... [more ▼]

Weather causes a variety of impacts on the transportation system. This paper contributes to the weather-related transport literature by investigating the meteorological variation in revealed preference travel data. The main objective of this paper is to investigate the impact of weather conditions on revealed activity participation (trip motives) and revealed modal choices in the Netherlands. To this end, data from the Dutch national travel household survey 2008 was matched to hourly weather data provided by the Royal Dutch Meteorological Institute. Two GEE-MNL models are constructed, namely one for modelling the impact of weather conditions on trip motive and one to assess the effect on modal choice. The parameter estimates of the weather variables indicate that, depending on which travel attribute one focuses, other factors might play a role. Nonetheless, fog, sunshine duration and temperature have a significant impact in both models. Unexpected is the fact that snow and ice cover do not play a role at all. Nonetheless, this finding can be accounted for by the relative low occurrence of these weather types in the study area. It is important to integrate these identified impacts of weather in travel demand modelling frameworks, since this will help to achieve a higher accuracy and more realistic traffic forecasts. This allows policy makers to make better long-term and short-term decisions to achieve various political goals, such as the development towards a sustainable transportation system. Further research in this regard, should emphasize on the role of weather conditions and activity-scheduling attributes. [less ▲]

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See detailThe Horn of Africa, the Factors of a Unity. Wars, Cultures and Imperialisms (19-20th centuries)
Genin, Vincent ULg

in Literatures of the Horn of Africa (Ethiopia, Eritrea, Somalia, Djibouti) : Beyond the Language and the Territory (2014)

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See detailA Fast Newton-Raphson Method in Stochastic Linearization
Canor, Thomas ULg; Blaise, Nicolas ULg; Denoël, Vincent ULg

in Proceedings of the Ninth International Conference on Structural Dynamics (2014)

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in ... [more ▼]

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in earthquake and wind engineering. It consists in replacing the nonlinear system by an equivalent linear one, by tuning the parameters of the equivalent system, in order to minimize some discrepancy error. Consequently classical analysis tools such as the spectral analysis may be reconditioned to approximate the solution of structures with slight to moderate nonlinearities. The tuning of the equivalent parameters requires the solution of a set of nonlinear algebraic equations involving integrals. It is typically performed with the fixed-point algorithm, which is known to behave poorly in terms of convergence. We therefore advocate for the use and implementation of a Newton-Raphson approach, which behaves much better, even in its dishonest formulation. Unfortunately, this latter option requires the costly construction of a Jacobian matrix. In the approach described in this paper, this issue is answered by introducing a series expansion method that provides a fast and accurate estimation of the residual function (whose solution provides the equivalent parameters) and a fast and approximate estimation of the Jacobian matrix. An illustration demonstrate the good accuracy obtained with the proposed method. [less ▲]

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See detailEvaluating functional data for the European Middle Palaeolithic
Rots, Veerle ULg

Conference (2014)

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