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See detailCritique et modernité
Filipucci, Alexis ULg; Pieron, Julien ULg

Conference (2014, January 09)

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See detailOn the Vedic Yajamâna-
Swennen, Philippe ULg

Conference (2014, January 07)

When he is consecrated, the Vedic Yajamâna symbolically becomes an embryo because he originally had the become a new Mârtânda in order to conquer the same divine status obtained by Vivasvant thanks to the ... [more ▼]

When he is consecrated, the Vedic Yajamâna symbolically becomes an embryo because he originally had the become a new Mârtânda in order to conquer the same divine status obtained by Vivasvant thanks to the realization of the first sacrifice. [less ▲]

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See detailRain-operated Foliar Disease Transmission
Gilet, Tristan ULg; Bourouiba, Lydia

Conference (2014, January 07)

Plant diseases are a major cause of crop loss worldwide. They are known to be triggered by rainfalls. We here combine high-speed visualizations and physical modelling to elucidate the causal link between ... [more ▼]

Plant diseases are a major cause of crop loss worldwide. They are known to be triggered by rainfalls. We here combine high-speed visualizations and physical modelling to elucidate the causal link between rain impact on foliage and pathogen spreading. We identify two dominant scenarios by which the pathogens get ejected from leaves. The leaf compliance is shown to strongly affect these mechanisms. The laws of fluid dynamics set tight limits on this epidemiological problem. They suggest a revision of the current agricultural practices in order to contain the spread of foliar diseases. [less ▲]

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See detailQuadratic reformulations of nonlinear binary optimization problems
Crama, Yves ULg

Conference (2014, January 06)

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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 detailAnalyse de stray-light d’un moyen d’essai de mesure de lumière parasite pour des instruments d’observation de la terre
Clermont, Lionel ULg

Conference (2014, January)

Description of the development of a facility for measuring stray light for earth observation instruments. Performance analysis by simulation (ASAP), and applications on instruments like ProbaV or Solar ... [more ▼]

Description of the development of a facility for measuring stray light for earth observation instruments. Performance analysis by simulation (ASAP), and applications on instruments like ProbaV or Solar Orbiter [less ▲]

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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 detailInnovative analytical strategies for small molecules analysis by ion-mobility mass spectrometry
Eppe, Gauthier ULg; Goscinny, Séverine; Far, Johann ULg et al

Conference (2014, January)

Detailed reference viewed: 39 (13 ULg)
See detailLe Silurien-Dévonien du Sahara Oriental Algérien (Bassin de Berkine et affleurements du Tassili n’Ajjer) : depuis la caractérisation de faciès jusqu’à la modélisation 3-D d’un réservoir non-conventionnel
Djouder, Hocine ULg; Boulvain, Frédéric ULg; Aït-Ouali, Rachid

Conference (2014, January)

Cette étude s'inscrit dans la thématique des projets Silurien-Dévonien Profond, sur la caractérisation des formations argileuses (source rock), des réservoirs gréseux conventionnels et non-conventionnels ... [more ▼]

Cette étude s'inscrit dans la thématique des projets Silurien-Dévonien Profond, sur la caractérisation des formations argileuses (source rock), des réservoirs gréseux conventionnels et non-conventionnels ainsi que de la matrice carbonatée, en partenariat institutionnel et industriel. 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. En effet, le Bassin de Berkine renferme des réservoirs potentiels : alternances argilo-gréseuses (AAG) du Silurien sommital et grès massifs du Lochkovien-Praguien et Emsien. Il renferme également des roches-mères, telles que les argiles radioactives (‘hot’) shales du Silurien, qui sont à l’origine de 80 à 90% des hydrocarbures et les argiles radioactives du Frasnien (source secondaire) avec des valeurs de TOC allant jusqu’à 14%. Au total 146 puits et une dizaine de carottes ont fait l’objet d’une analyse de facies/électrofacies et de stratigraphie séquentielle « Stacking Patterns » de haute résolution. Ceci a pour 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 » jugées 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, à travers les puits MLEP-1 & BRD-5. 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 plate-forme externe profonde passent au sommet à des faciès carbonatés très vite surmontés 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 six unités, majoritairement gréso-carbonatées ont été décelées. Les Grès massifs de Tadrart ‘Unité b’ d’un prisme de bas niveau (LST) d’âge Lochkovien, sont constitués de dépôts fluviatiles. Ils sont surmontés par des sédiments ferrugineux de l‘Unité c’ (TST). L‘Unité d’ correspond au Praguien, suivi de la formation emsienne ‘Unité e’ (HST) à grès massifs de type fluviatile-estuarien et qui sont notamment caractérisés 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. L‘Unité f’ (Eifélien-Givétien) atteint environ 110 m d’épaisseur, avec un Givétien qui est essentiellement carbonaté. Au final, on observe l’installation définitive, en discordance, des argiles radioactives (‘Unité g’) d’âge Frasnien-Fammenien. L'originalité de la poursuite de cette étude consistera à coupler plusieurs techniques de caractérisation, afin de répondre aux multiples problématiques à la fois scientifiques et industrielles. Parmi les méthodes prévues pour cette étude, on retrouvera la spectrométrie DRX, la microspectrométrie InfraRouge (FTIR) ainsi que la pyrolyse Rock-Eval pour la caractérisation fine des assemblages argileux. L’étude minéralogique des faciès/microfaciès gréseux et carbonatés en microscopie (optique, MEB) et cathodoluminescence sera aussi entreprise afin de contraindre au mieux l’évolution diagénétique des réservoirs, de même que la quantification de la porosité par la méthode (14C-PMMA). Les inclusions fluides seront d’un grand apport pour comprendre l’histoire thermique du Bassin de Berkine ainsi que la relation avec les migrations primaires des hydrocarbures. L’ensemble de ces données seront exploitées dans le modèle 3D réservoirs, qui sera construit à l’aide du logiciel de l’industrie pétrolière Petrel©. [less ▲]

Detailed reference viewed: 55 (26 ULg)
See detailFluxonics
Silhanek, Alejandro ULg

Conference (2014, January)

Detailed reference viewed: 18 (4 ULg)
See detailFast chromatographic method for explosive profiling
Stefanuto, Pierre-Hugues ULg; Peyrrault, Katelynn; Focant, Jean-François ULg et al

Conference (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 detail"Synthèse des travaux"
Delruelle, Edouard ULg

Conference (2014)

Detailed reference viewed: 2 (0 ULg)
See detailEpigenetic effects of omega-3 FA on the immune response of broiler breeder offspring
Koppenol, A.; Everaert, Nadia ULg; Franssens, L. et al

Conference (2014)

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See detailHypothalamic AMPKalpha1 and neuropeptides are involved in neonatal performance of broiler chicks hatched at different times
Wang, Y.; Koppenol, A.; Lesuisse, J. et al

Conference (2014)

Detailed reference viewed: 13 (2 ULg)
See detailWakefulness regulation: from light to cortical excitability
Vandewalle, Gilles ULg

Conference (2014)

Detailed reference viewed: 10 (0 ULg)
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See detailTransparent electrodes composed of silver nanowire networks for photovoltaic applications
Langley, Daniel ULg; Lagrange, Mélanie; Munoz-Rojas, David et al

Conference (2014)

Research is increasingly being dedicated towards replacing rare earth elements in Transparent Conductive Materials (TCMs). In this work we present the investigation of silver nanowire (AgNW) networks as ... [more ▼]

Research is increasingly being dedicated towards replacing rare earth elements in Transparent Conductive Materials (TCMs). In this work we present the investigation of silver nanowire (AgNW) networks as transparent electrodes for solar cell applications. Metallic nanowire networks can be deposited via low cost deposition techniques and exhibit very interesting electrical, optical and mechanical properties. Experimental and simulation approaches aim at improving their physical properties. Indeed, we show that a thermal annealing can drastically improve transport properties of the nearly transparent networks. We also explore the optimization of the network density. These percolating networks exhibit excellent properties (i.e. sheet resistances (Rs) of about 10 Ω/sq and optical transparency of approximately 90%) compatible with solar applications requirements. This makes them very appropriate for future uses in low cost, large area and flexible solar and display technologies. A comprehensive understanding of the main physical properties of this promising nanostructured network and its integration with solar cells will then be presented [less ▲]

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See detailPhysical properties of silver nanowire networks: effects of percolation and thermal annealing
Langley, Daniel ULg; Lagrange, Mélanie; Giusti, Gael et al

Conference (2014)

Silver nanowire networks have recently been a heavily researched subject due to their potential use as transparent electrodes in solar cells or flat panel displays. Currently, the most commonly used ... [more ▼]

Silver nanowire networks have recently been a heavily researched subject due to their potential use as transparent electrodes in solar cells or flat panel displays. Currently, the most commonly used material for such applications (Tin-doped Indium oxide) suffers from two major drawbacks: indium scarcity and brittleness. However, metallic nanowire networks can be deposited by low cost deposition techniques and exhibit simultaneously very promising optical, electrical and electro-mechanical properties. To enhance these properties, nanowire density should be considered. For a given nanowire aspect ratio, lower nanowire densities result in higher optical transparency but demonstrate lower electrical conductivity. As the density of nanowires is increased the relationship is reversed, resulting in high electrical conductivity but low optical transparency. Numerical Montecarlo simulations on stick percolation shed light on the percolative nature of these 2D networks. Relations between simulation and experimental observations are discussed. We also show that thermal annealing can efficiently improve the electrical properties without significantly changing the optical response2. However, above a certain temperature threshold, morphological instabilities occur and induce a cancelling out of the beneficial effects. The physical mechanisms involved in thermal annealing of Ag nanowire networks are addressed as well as their effects on electro-optical properties. Finally the potential integration of Ag nanowire networks into devices is evaluated. [less ▲]

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See detailNPM Under Pressure: An Inquiry in Theory
Esposito, Giovanni ULg

Conference (2014)

This theoretical inquiry is undertaken on the basis of the problematization methodology proposed by Alvesson et Sandberg (2011) and deriving from a critical approach to management studies. In this paper ... [more ▼]

This theoretical inquiry is undertaken on the basis of the problematization methodology proposed by Alvesson et Sandberg (2011) and deriving from a critical approach to management studies. In this paper, problematization is adopted not only to question the fundamental assumptions of New Public Management (NPM) theory, but also to develop alternative assumptions to be explored in order to highlight a new way of approaching the managerial practices of public organizations. Starting from the in-house level of assumptions, NPM theoretical body has been gradually deconstructed by progressively increasing the level of abstraction and reaching the field level of assumption. The assumption’s content at each level of abstraction has been determined thanks to a continuum comparison between NPM and the Public Value Theory (PVT) school of thought. Because of its status of challenging theory, PVT has played the role of a theoretical reagent added to NPM system of thought in order to bring about a theoretical reaction enabling to spotlight problematic assumptions and generate further research questions. Such a “theoretical reaction” has shown that NPM is a functionalist theory based on a rationalistic approach to public organizations which are conceived as machines whose proper functioning depends on efficiency improvements to be achieved by means of a planning mode of management. [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 detailLa contribution des lobes frontaux au fonctionnement exécutif
Collette, Fabienne ULg

Conference (2014)

Detailed reference viewed: 17 (1 ULg)
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See detailGenotype x Climate interactions for protein yield using four European Holstein Populations
Hammami, Hedi ULg; Carabaño, Maria-Jesus; Logar, Betka et al

Conference (2014)

Detailed reference viewed: 10 (1 ULg)
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See detailThe Belgian Congolese Relation. Reading the postcolonial malus
Demart, Sarah ULg

Conference (2014)

The integration of immigrants and their offspring is one of the major challenges facing Belgian society. Like other societies in the northern hemisphere, Belgian society is now characterised by ‘super ... [more ▼]

The integration of immigrants and their offspring is one of the major challenges facing Belgian society. Like other societies in the northern hemisphere, Belgian society is now characterised by ‘super-diversity’ (Vertovec 2007). In comparison with other OECD countries, Belgium seems to face particular difficulties with regards to the integration of its immigrants and their offspring in the fields of access to employment, private housing and education. Stemed from discriminatory practices (Economic and Social Council 2006) these problems constitute however the blind spot of the academy. In this paper, I would like to consider the “postcolonial bonus” hypothesis (Oostindie, 2011) with regards to the Congolese community in Belgium. Belgian’s colonial migration history presents differences with regards to the British, French or Dutch configurations. Nowadays, three generations of Congolese Belgians make up a community that shows a paradoxical socioeconomic integration pattern, combining on average the highest level of education with the highest level of unemployment in Belgian society (Schoonvaere, X). Despite an intense involvment of Congolese Belgians in the academic, associative, political or artistic spheres, several variables point towards a particular post-colonial racialization process. The absence of a public debate on the colonial history of Belgium suggests a link between the marginalization of this group and the colonial legacy of the society that will be developped from a comprehensive sociology and ten years of immersion within the Congolese circles. [less ▲]

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

Conference (2014)

Le portfolio est souvent présenté comme un outil idéal pour documenter le développement des compétences. Sa mise en œuvre confronte les différents acteurs de l’enseignement et de la formation à la ... [more ▼]

Le portfolio est souvent présenté comme un outil idéal pour documenter le développement des compétences. Sa mise en œuvre confronte les différents acteurs de l’enseignement et de la formation à la difficile question de la description de la preuve de compétence. Comment constituer une preuve? Quels éléments apporter pour démontrer le développement de la compétence ? Cet article aborde ces questions à travers des données empiriques, celles-ci permettant d’illustrer concrètement les notions abordées. [less ▲]

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See detailLa Brigade d'intervention de la MONUSCO et le peacebuilding
Baenda Fimbo, Zacharie ULg

Conference (2014)

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See detailQu'est-ce que l'huile de palme
Danthine, Sabine ULg

Conference (2014)

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See detailEffet de la lumière sur les fonctions cognitives non-visuelles
Vandewalle, Gilles ULg

Conference (2014)

Detailed reference viewed: 34 (4 ULg)
Peer Reviewed
See detailLe Théâtre Flamand. Le progrès en scène.
Prina, Daniela ULg

Conference (2014)

Detailed reference viewed: 16 (5 ULg)
See detailHighly Diffuse Fluorine-doped SnO2 Thin Films for Photovoltaic Applications
Giusti, Gael; Consonni, Vincent; Langley, Daniel ULg et al

Conference (2014)

In the last decades, polycrystalline fluorine-doped SnO2 (FTO) thin films have received increasing interest due to their promising application in a wide variety of devices such as gas sensors, coatings ... [more ▼]

In the last decades, polycrystalline fluorine-doped SnO2 (FTO) thin films have received increasing interest due to their promising application in a wide variety of devices such as gas sensors, coatings and electrodes for solar cells. FTO thin films exhibit good electro-optical properties and other important physical properties such as a high work function, good thermal stability… FTO thin films have already been shown to act as an efficient transparent electrode in solar cells. In this work, FTO thin films were grown by ultrasonic spray pyrolysis on glass and flexible polymer substrates. The structural, electronic and optical properties of these FTO layers were thoroughly investigated. Our work focuses on a better understanding of their electro-optical properties, in terms for instance of electron scattering. We show that FTO layers (when combined with ZnO nanoparticles) exhibit haze factor as high as 60%, whilst maintaining very good electro-optical properties. The integration into solar cells is also presented. [less ▲]

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See detailTransparent electrodes composed of silver nanowire networks: physical properties and potential applications
Langley, Daniel ULg; Lagrange, Mélanie; Munoz-Rojas, David et al

Conference (2014)

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See detailNew Insights into Iron-Based Photosynthesis
Thompson, K; Lliros, M; Borrego, C et al

Conference (2014)

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See detailFrench Pragmatic Sociology: A Materialist Renewal of Critical Theory
Frère, Bruno ULg

Conference (2014)

From Lukács to Bourdieu, many significant intellectual developments have taken place and, in fact, one may gain the impression that the critical tradition continues to be based on one key assumption ... [more ▼]

From Lukács to Bourdieu, many significant intellectual developments have taken place and, in fact, one may gain the impression that the critical tradition continues to be based on one key assumption: individuals (workers, social actors, etc.) unconsciously reproduce the social structures of capitalism whilst being alienated by them. They accept the conditions enforced on them and no longer seek to rebel against a system which impoverishes not only their work and culture, but also their [soul]problematic? and creativity. The situation may be even more diree: they ensure the reproduction of the system by seeking to engage in mass consumption at any cost, or by glorifying the dominant values. In this chapter I would like to show that toay, no critical perspective has emerged out of a negative representation of the world such is likely to introduce ‘man’ living here and now as something other than a deeply bastardized being, corrupted, denatured, perverted, inflected, soiled by a civilizing process which owes its perversion to modernity (Rousseau) on the one hand, and to capitalism on the other. As we shall see, without making an exception, Honneth has rightly noted that all the authors of the tradition of what he calls ‘social philosophy’ have remained dependent on a form of disgust regarding the world as it is. Yet for me as a sociologist of social movements, it seems difficult to deal with such a [software]? of the new forms of social resistance to domination (Indignados, anonymous, alternative economy, movements of the ‘-less’ – see Frère and Jacquemain, 2013), even though it is precisely the same kind of diagnosis adopted by a significant number of theories dealing with cooperation and association. Some amongst them leave me sceptical, notably when it comes to the shared desire to [locate,]posit? for instance, an alternative and [solidary]? economy in the field of utopia, as opposed to a succinct and time-honoured representation of Marxism (Pessin, 2001; Pradès, 2012; Hély and Moulévrier, 2013), or to subscribe to the 'natural' reciprocity of human beings as they lived before the arrival of capitalist modernity, , thus before the ideology of growth perverted human imagination (Godbout, 2000). is this right? In my opinion, in order to be able to talk about contemporary reactions of resistance against diverse forms of alienation and domination authorized by contemporary [connectionist]? capitalism, a philosophical representation of the passive, unconscious human reified by this very same domination, which only a few holy utopian thinkers would avoid, remains ineffective. This is because, in the case of such a representation, the modern subject will be likely to react when criticism will have taken away that layer of impurity specific to the condition of alienated man in order to allow him to renew his deep nature, the one which was his in the context of the ‘good life’ , as Habermas and Honneth would say . Yet abolishing the very possibility of transcendentalism and idealism which lies implicit in contemporary critical theories, whether French or German, opens the door to the possibility, in the incertitude of the social model that they may create, of an actual – but profane – criticism of capitalisme. Here, it is a matter of human relationships in the world that gives criticism its content, in all their insurmountable impurity, in all their contingency. Aiming at abolishing the transcendental anthropological foundations that criticism has always allowed itself, this gesture is currently silhouetted not in philosophy but, rather, in a sociology, that is, ‘pragmatic sociology’. Parallel to the classical Marxist tradition traversing Bourdieu’s critical sociology and the intellectual tradition of the Frankfurt School, it is a form of ‘critical materialism’ that I would like to exhume in this chapter, a notion inspired by the libertarian Marxism of Lefort and Castoriadis (see Frère, 2009), which is able to make the profane capacities of people’s emancipation emerge . I would like to do so on the basis of a reflection revolving around the pragmatic perspective which has recently been reinforced in France by Boltanski in his book De la critique (2009), but which stands – in my view – as the backdrop of all his works. [less ▲]

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See detailCortical excitability depends on time awake and circadian phase
Ly, Julien; Gaggioni, Giulia ULg; Chellappa, Sarah Laxhmi ULg et al

Conference (2014)

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See detailThermal properties of silver nanowire networks
Sorel, Sophie; Lagrange, Mélanie; Langley, Daniel ULg et al

Conference (2014)

Silver nanowire (AgNW) networks have recently been the focus of intense research due to their potential use as transparent electrodes in solar cells, flat panel displays or transparent heaters. Metallic ... [more ▼]

Silver nanowire (AgNW) networks have recently been the focus of intense research due to their potential use as transparent electrodes in solar cells, flat panel displays or transparent heaters. Metallic nanowire networks can be deposited using low-cost and scalable deposition techniques on flexible substrates. For improving the transport properties (thermal and electrical) and optical transmittance in the visible range, an optimum nanowire density should be considered. In the present contribution we investigate the thermal behaviour of AgNW networks based on two aspects. The first one shows that a thermal annealing can drastically improve transport properties. The second approach investigates the physical properties of the network when used to generate heat. Experimental observation shows that AgNW networks exhibit the properties of a very efficient transparent heater, making them appropriate for future uses compatible with large area and flexible display technology. A comprehensive understanding of the thermal properties of this promising transparent nanostructured network will be presented. [less ▲]

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See detailEst-il possible de sécuriser l’après-restructuration ? Exploration des « cellules de reconversion » belges
Dervaux, Amélie ULg; Pichault, François ULg; Lorquet, Nadège ULg

Conference (2014)

Colloque -Les « cellules de reconversion » belges sont gérées par le service public de l’emploi et ont été créées li y a quelques années à la demande spécifique des syndicats afin de favoriser la ... [more ▼]

Colloque -Les « cellules de reconversion » belges sont gérées par le service public de l’emploi et ont été créées li y a quelques années à la demande spécifique des syndicats afin de favoriser la réinsertion des travailleurs licenciés sur le marché de l’emploi. Comment les travailleurs sont-ils accompagnés dans la période de transition professionnelle post-licenciement ? Ces cellules à vocation sécurisante le sont-elles effectivement ? [less ▲]

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See detailInterplay between defects in metallic nanowire networks and their physical properties: a modeling and experimental approach
Lagrange, Mélanie; Langley, Daniel ULg; Munos-Rojas et al

Conference (2014)

The use of random metallic nanowire networks as transparent conductive materials (TCMs) is increasing rapidly. These materials can be used in flexible/stretchable electronics, flexible displays, touch ... [more ▼]

The use of random metallic nanowire networks as transparent conductive materials (TCMs) is increasing rapidly. These materials can be used in flexible/stretchable electronics, flexible displays, touch screens, photovoltaics or as transparent heaters. Metallic nanowire networks can be deposited by using low-cost and scalable deposition techniques and exhibit very interesting electrical, optical, thermal and mechanical properties. In addition to usual material defects (such as grain-boundaries) any deviation from a “perfect” infinite network (i.e. nanowire length distributions, finite device size or nanowire curvature for instance) play a prominent role in the physical properties of the resulting percolating network. Using Monte Carlo simulations, and based on experimental available wires the effects of these defects are explored. Experimental work is focused on the influence of nanowire density as well as defects within the nanostructured network such as the inhomogeneity of the network, the grain-boundary along a nanowire, the morphological nanowire instabilities… The influence of these defects on the physical properties of this promising nanostructured network will be presented [less ▲]

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See detailEstimating Relative Change in Ventricular Stroke Work from Aortic Pressure
Kamoi, Shun; Pretty, Christopher; Chiew, Yeong Shiong et al

Conference (2014)

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See detailStudy of the potentiality of insect breeding system for human food in Cambodia (Ratanakiri province)
Caparros Megido, Rudy ULg; Alabi, Taofic ULg; Nieus, Clément et al

Conference (2014)

The main purpose of this work was to optimize a cheap cricket breeding production for local farmers based on unused wild resources. Cricket development (Teleogryllus testaceus (Walker)) was compared ... [more ▼]

The main purpose of this work was to optimize a cheap cricket breeding production for local farmers based on unused wild resources. Cricket development (Teleogryllus testaceus (Walker)) was compared according to seven diets composed of different ratio of aerial parts of taro, young cassava leaves, young cashew leaves, brown rice flour (with or without banana slices) and between the traditionally used chicken feed diet. Cricket mortality was low on all diets (<10 %) excepted on the two cashew-based diets (>90 %). Mean adult body mass was significantly higher on chicken feed diet and on the two cassava-based diet than on the other. Moreover, protein percentage in cassava-feed crickets was similar with this of wild crickets. As each villager grows cassava for their tubers without using the leaves, this free available resource could be used to rear crickets in order to contribute to the reduction of protein deficiency and create new source of incomes for local farmers. [less ▲]

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See detailInnover dans le contexte de l’enseignement supérieur : une rencontre entre recherche et pratique enseignante
Poumay, Marianne ULg

Conference (2014)

Après avoir rappelé quelques-uns des défis qui se posent aujourd’hui à l’enseignement supérieur –et plus particulièrement à ses enseignants –et défini ce qui est entendu par «innovation pédagogique » ... [more ▼]

Après avoir rappelé quelques-uns des défis qui se posent aujourd’hui à l’enseignement supérieur –et plus particulièrement à ses enseignants –et défini ce qui est entendu par «innovation pédagogique », cette communication explore six portes d’entrée dans le changement. Elle épingle ensuite, en les illustrant, quelques grandes tendances innovantes en lien avec les technologies Internet et les lie systématiquement tant à la recherche qu’à l’enseignement. Les liens avec la recherche sont explorés pour chaque type d'innovation. [less ▲]

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See detailMetallic nanowire networks for energy applications: experimental and modelling approaches
Langley, Daniel ULg; Lagrange, Mélanie; Munoz-Rojas, David et al

Conference (2014)

Research is increasingly being dedicated towards finding emerging materials aiming at playing a prominent role in energy issues. Transparent electrodes are a key component of devices such as solar cells ... [more ▼]

Research is increasingly being dedicated towards finding emerging materials aiming at playing a prominent role in energy issues. Transparent electrodes are a key component of devices such as solar cells or efficient lighting (such as OLED). Among emerging transparent conductive materials, metallic nanowire networks appear to be a very promising solution. This work aims at designing and optimizing metallic nanowire networks based on both experimental and modelling approaches. The influence on the networks physical properties of several key parameters such as the metal/alloy used, thermal annealing, network density, device size, etc. are explored. These percolating networks exhibit excellent properties (sheet resistances and optical transparency of about 10 Ω/ sq and 90%, respectively) fulfilling the requirements for solar or efficient opto-electronic applications. This makes them very appropriate for future uses involving large area and flexible photovoltaics or efficient lighting display technologies. A comprehensive understanding of the design and main physical properties of these promising nanostructured networks will be presented [less ▲]

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See detailConsumer acceptance of insect-based meat substitutes
Caparros Megido, Rudy ULg; Gierts, Chloé; Blecker, Christophe ULg et al

Conference (2014)

Meat plays an important role in the consumption pattern of most European and North American consumers. Meat production is responsible for a well known environmental pressure due to the inefficient ... [more ▼]

Meat plays an important role in the consumption pattern of most European and North American consumers. Meat production is responsible for a well known environmental pressure due to the inefficient conversion of plant protein to meat protein and alternatives sources, such as insects or algae, will be rapidly required. In a recent theorical study, de Boer et al. (2013) show that consumers prefer to eat a hybrid meat product (i.e. a mix of meat and its substitute) rather than a pure meat substitute [3]. Based on these preliminary results, hedonic tests were realized to assess the acceptability of insect-based burgers in a target population composed of people from 15 to 25 years old, considered as the future insect consumers. Isolated in a tasting booth, each participant was invited to taste four burger samples containing a ratio of 20 gr of protein by 100 gr of burger. The first burger was prepared with 95% of grounded beef (1), the second with 95% of green lentil (2), the third with 45% of green lentil and 50% of mealworms (Tenebrio molitor L.; Coleoptera, Tenebrionidae) and the fourth with 45% of grounded beef burger and 50% of mealworms. The last 5% of each burger consists of an aromatization portion containing onions, carrots, tomato paste and garlic. Participants were asked to rate each sample on a 9-point hedonic scale, where extreme sides were noted from “extremely dislike” (left) to “extremely like” (right). Tukey post-hoc comparisons on the appreciation results showed that beef-based products (with or without mealworms) were relatively preferred to lentil-based products (with or without mealworms), probably because hybrid meat burgers seem more familiar to the consumers than vegetable burgers, and that no liking differences were noticed between the two beef-based burgers and between the two insect-based burgers. These results confirm that shape and appearance are key criteria in the acceptation of meat substitute by non-vegetarian consumers and that insects will preferentially be consumed, in the future, if they are presented in an invisible way and associated with familiar flavors. [less ▲]

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See detailFirst palynological record of the Silurian/Devonian boundary in the San Juan Precordillera, Argentina
Garcia Muro, V.J.; Rubinstein, C.V.; Steemans, Philippe ULg

Conference (2014)

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See detailThe arbitrability of disputes
Kohl, Benoît 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 detailInnovative Electrodes for Dye Sensitized Solar Cells
Langley, Daniel ULg; Giusti, Gael; Zhang, Shanting et al

Conference (2014)

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See detailClarifier les dimensions socio-économiques et politiques de l'agroécologie : au delà des principes, des compromis
Dumont, Antoinette; Stassart, Pierre M ULg; Vanloqueren, Gaetan et al

Conference (2014)

Le concept d’agroécologie est de plus en plus mobilisé en Europe. Toutefois, les dimensions socio-économiques et politiques de cette alternative au modèle productiviste restent encore peu qualifiées dans ... [more ▼]

Le concept d’agroécologie est de plus en plus mobilisé en Europe. Toutefois, les dimensions socio-économiques et politiques de cette alternative au modèle productiviste restent encore peu qualifiées dans le monde académique. La présente étude contribue à clarifier les principes socio-économiques et politiques de l’agroécologie, en mettant les principes identifiés dans la littérature grise et scientifique à l’épreuve de l’étude qualitative de deux systèmes alimentaires belges : Agribio, une coopérative céréalière ; les Grosses Légumes un réseau de ménages, producteurs et citoyens membres qui organisent la production et la distribution de paniers de légumes. Des entretiens semi-directifs ont été effectués auprès des différents acteurs de ces systèmes alimentaires. Ils ont été analysés à la lumière de la théorie de la justification de Boltanski et Thévenot afin de mettre en évidence les principes que les acteurs rencontrés se donnent et tentent de mettre en application dans les différents projets qu’ils réalisent. Les principaux résultats obtenus sont explicités par l’analyse de quatre compromis (qui concernent les systèmes de commercialisation des deux systèmes alimentaires, un Système de Garantie Participative mis en place par les Grosses Légumes et la meunerie d’Agribio), plus spécifiquement étudiés via les objets qui matérialisent ces compromis et les controverses qui les remettent en question. Les deux études de cas illustrent l’écart qui existe entre les principes qui décrivent un horizon vers lequel l’agroécologie tend et les principes mis concrètement en oeuvre par les acteurs de terrain au travers des différentes trajectoires de transition. [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 detailShould I Access or Should I Own? Perceived Risks as Barriers to Access-Based Consumption
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

Conference (2014)

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See detailLe règlement des litiges immobiliers sous les auspices du CEPANI
Kohl, Benoît ULg

Conference (2014)

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See detailEffect of viscosity on the robustness of the element deletion method for crack propagation modelling
Canales Cardenas, Cristian ULg; Ponthot, Jean-Philippe ULg

Conference (2014)

The numerical simulation of crack propagation in solids is of main importance in fracture mechanics and has been extensively studied over the years. Several approaches have been developed in order to ... [more ▼]

The numerical simulation of crack propagation in solids is of main importance in fracture mechanics and has been extensively studied over the years. Several approaches have been developed in order to describe the evolving geometry of a crack [1{6], but despite the research e orts some challenges are still present. A commonly used technique in Finite Element codes is the element deletion method due to the simplicity of its numerical implementation and possible extension to 3D. Furthermore, it is possible to couple this method with any failure criterion or damage model without additional considerations. This advantages are extremely desirable for numerical approaches involving high computational costs, e.g. the multi-scale computational homogenization [7, 8], where the element deletion method can be used at the micro-scale to simulate the nucleation, growth and coalescence of micro-voids [9]. [less ▲]

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See detailOn the numerical simulation of sheet metal blanking process
Canales Cardenas, Cristian ULg; Bussetta, Philippe ULg; Habraken, Anne ULg et al

Conference (2014)

One of the most widely used cutting techniques in sheet metal forming processes for mass production is the blanking process. In this process, a metallic sheet is placed between a die and a blankholder ... [more ▼]

One of the most widely used cutting techniques in sheet metal forming processes for mass production is the blanking process. In this process, a metallic sheet is placed between a die and a blankholder, and is then cut by the action of a punch which moves downward. The quality of the final product is directly linked to the resulting shape of the cut edge. Due to the complexity of the separation step, the set-up of the blanking process in practice is often driven by empirical knowledge. Thus, an accurate numerical tool is extremely desirable to optimize the setting parameters of this technique and will lead to a better understanding of the entire process. The numerical approach must be able to deal with three main issues involved in blanking: large and localized deformation, friction and contact, and ductile fracture. Furthermore, due to requirements of mass production the punch velocity is normally high and the effects of the strain rate must also be considered. Several approaches have been developed in order to model this cutting process but its accuracy still presents some numerical challenges. [less ▲]

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See detailCan systems using hyper specialized breeds be considered as localized agrifood systems? The example of the Belgian Texel breed
Lauvie, Anne; Stassart, Pierre M ULg

Conference (2014)

The Belgian Texel sheep breed is a meat purpose breed, the Belgian form of the Dutch Texel breed, with muscular hypertrophy. Comparing the situation of this breed to others hyper specialized breeds in ... [more ▼]

The Belgian Texel sheep breed is a meat purpose breed, the Belgian form of the Dutch Texel breed, with muscular hypertrophy. Comparing the situation of this breed to others hyper specialized breeds in Belgium raise the question of the existence of a Belgian breeding model. We interviewed 11 stakeholders concerned by the Texel breed (breeders, scientists, veterinary, extension service technician, and butcher). Those interviews have allowed us to discuss three dimensions of the Texel breed management: ‐ The breed is actually a breeding animals propose breed. Sheep meat is few consumed in Belgium and butchers seem to prefer crossbreed meat than pure Texel meat. As a consequence the main aim for breeding Texel is breeding animals selling. The breeders consider the selection activity as their activity, and underline that it is more interesting for them from an economical point of view to sell breeding animals abroad (United Kingdom). ‐ The breed management follows a Belgian model and is as a consequence localized! The Blanc Bleu Belge cattle breed is clearly a model for the Texel breeders and several of them mention the “Belgian eye of the breeder”. Producing meat in quantity is the core motivation in this breeding model (a breeding model that echoes an engineering culture where performance is a core motivation). Among the organization of breeding in Belgium, the breeding shows contests are important places where this model is shared by breeders, even among deferent species. ‐ The breed is very well adapted to its breeding situation but what about it adaptive capacities? The breed is mentioned as adapted to grazing (good quality grassland) and it is as well adapted to socio-territorial conditions of belgium (small area). The breed is easy to breed (except during the lambing period very time consuming which means that flocks are often small flocks). It’s considered as well adapted to breeding animal production for crossbreeding. However, most of the interviewed persons have mentioned failures in adaptation to changes in breeding conditions (bigger flocks, breeding in hot climate area for instance). Thanks to this case study, we discuss the fact that qualifying an agrifood system as “localized” is not enough and that it is crucial to understand and analyze the anchorages in local as dynamics and in their dynamics. [less ▲]

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See detailStick Percolation: Models for Real Systems
Langley, Daniel ULg; Lagrange, Mélanie; Nguyen, Ngoc Duy ULg et al

Conference (2014)

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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 detailDéfinir rigoureusement des trajectoires de développement pour chacune des compétences à la base de la formation
Tardif, Jacques; Poumay, Marianne ULg; Georges, François ULg

Conference (2014)

But de l'atelier: Présenter une démarche de conception et d’élaboration de trajectoires de développement de compétences inscrite dans une logique de professionnalisation graduelle de l’étudiant.

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See detailWetlands influencing river biogeochemistry: the case study of the Zambezi and the Kafue Rivers
Teodoru, CR; Nyoni, FC; Nyambe, I et al

Conference (2014)

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See detailTransgenerational and long-term effects induced by reduced protein availability by albumen removal during embryonic development in laying hens
Willems, E.; Koppenol, A.; Franssens, L. et al

Conference (2014)

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See detailCortical excitability dynamics of during sleep deprivation set PVT performance
Borsu, Chloé; Gaggioni, Giulia ULg; Ly, Julien et al

Conference (2014)

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See detailLes multiplexes en allergie
GADISSEUR, Romy ULg

Conference (2014)

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See detailOrigin and evolution of the early land plants in Argentina and South America through the palynological record
Rubinstein, C.V.; Garcia Muro, V.J.; Steemans, Philippe ULg

Conference (2014)

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See detailNO3- Reduction is Fe-Dependent in a Ferruginous Chemocline
Michiels, C.; Darchambeau, François ULg; Roland, Fleur ULg et al

Conference (2014)

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

Conference (2014)

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See detailExperimental investigation of an ORC system for a micro-solar power plant
Dickes, Rémi ULg; Dumont, Olivier ULg; Declaye, Sébastien ULg et al

Conference (2014)

Because of the depletion of fossil fuels and global warming issues, the world energy sector is undergoing various changes towards increased sustainability. Among the different technologies being developed ... [more ▼]

Because of the depletion of fossil fuels and global warming issues, the world energy sector is undergoing various changes towards increased sustainability. Among the different technologies being developed, solar energy, and more specifically CSP (Concentrated Solar Power) systems are expected to play a key role to supply centralized loads and off-grid areas in the medium-term. Major performance improvements can be achieved by implementing advanced control strategies accounting for the transient and random nature of the solar heat source. In this context, a lab-scale solar power plant has been designed and is under construction for experimental purposes and dynamic analysis. The test rig includes an Organic Rankine Cycle (ORC) unit, a field of parabolic trough collectors and a thermal energy storage system. This paper presents the results of an experimental campaign conducted on the ORC module alone. This power unit, designed for a 2.8 kW net electrical output, consists of two scroll expanders in series, an air-cooled condenser, a recuperator, a volumetric pump and an oil-heated evaporator. The ORC engine is constructed using standard mass manufactured components from the HVAC industry, this practice reducing considerably the system cost. The overall unit performance and components effectiveness are presented in different operating conditions and relevant empirical correlations are derived to be implemented in a steady state model of the ORC unit. [less ▲]

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

Conference (2014)

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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 detailDESIGN, MODELING AND EXPERIMENTATION OF A REVERSIBLE HP-ORC PROTOTYPE
Dumont, Olivier ULg; Quoilin, Sylvain ULg; Lemort, Vincent ULg

Conference (2014)

This paper presents an innovative system comprising a heat pump connected to a solar roof and a geothermal heat exchanger. This heat pump is also able to invert its cycle and operate as an ORC. By using ... [more ▼]

This paper presents an innovative system comprising a heat pump connected to a solar roof and a geothermal heat exchanger. This heat pump is also able to invert its cycle and operate as an ORC. By using the whole rooftop (hereunder called “absorber”) as a heat source, a large amount of heat is generated throughout the year. This heat is used in priority to cover the building annual heating needs and the surplus heat generated during the summer is utilized to generate electricity in a so-called HP/ORC module. This paper will thus focus on these two main points: designing of the prototype and results from experimentation. This paper demonstrates the feasibility of such a prototype with encouraging performance in ORC and HP modes. Experimentally, a COP of 4.2 is reached in heat pump mode and a global efficiency of 5.6 is obtained in ORC mode. Possible means of improvement and perspectives are finally described. [less ▲]

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See detailValidation of a SPH model for free surface flows
Goffin, Louis ULg; Erpicum, Sébastien ULg; Dewals, Benjamin ULg et al

Conference (2014)

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See detailThe determinations of household agricultural land use strategies in Red River Delta, Vietnam
Nguyen Thi, Dien; Vu Dinh, Ton; Lebailly, Philippe ULg et al

Conference (2014)

This research presents the determinations of household land use strategy in the context of the rapid rural changes due to the industrialization and urbanization in Vietnam. The mechanism that turns land ... [more ▼]

This research presents the determinations of household land use strategy in the context of the rapid rural changes due to the industrialization and urbanization in Vietnam. The mechanism that turns land to livelihood from both productive and non-productive processes is investigated to understand the different land use strategies of smallholders in Red River Delta region. Based on the presence of migrating members, the total selected 191 households in Hai Duong province were divided into 3 different groups to do the surveys. The research results show that local land use strategies are various in which 79.06% of surveyed households maintain the allocated land for agricultural production while 65.97% of households leave land idly at least once a year. The factors from productive process such as small landholding, high production cost and overall downward income from agricultural production meantime the greater opportunities from non-farm jobs are the main socio-economical determinations of agricultural land abandonment or less effective use. The security questions of shifting livelihood between farming and non – farming sectors, the inter-household arrangements, the social supports and the institutional constraints are non-productive elements that make the exchange and other forms of commercializing agricultural land are less prominent. The complexity of household land use strategy and its determinations not only reflects the dynamism and flexibility of peasant’s livelihood adaptation but also explain why the land concentration does not proceed faster in Red River Delta region of Vietnam. [less ▲]

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