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See detailLa médiation, un lien social à reconstruire.
Bachelet, Jean-François ULg

Conference (2015, May 08)

Detailed reference viewed: 35 (5 ULg)
See detailPrésentation de ModerNum
Regibeau, Julien ULg; Simon, Nicolas; Guri, Shipé

Conference (2015, May 08)

Detailed reference viewed: 23 (3 ULg)
See detailBière, vin et autres boissons en usage dans les communautés de cisterciennes (13e-18e s.) : discours, représentations et pratiques
Henneau, Marie-Elisabeth ULg

Conference (2015, May 08)

Au départ de quelques mentions relatives aux boissons présentes dans les archives de la Paix-Dieu, on examinera tout d’abord les usages en vigueur au plan local – dans les limites de la documentation ... [more ▼]

Au départ de quelques mentions relatives aux boissons présentes dans les archives de la Paix-Dieu, on examinera tout d’abord les usages en vigueur au plan local – dans les limites de la documentation disponible – avant de les rapprocher des prescriptions introduites dans l’Ordre de Cîteaux à propos des règles alimentaires en général et de la consommation de vin et de bière en particulier. On en suivra les évolutions et on tentera d’en souligner les enjeux majeurs – spirituels, ecclésiologiques, politiques – dans le contexte des réformes successives, et, notamment, au moment de la Querelle des Observances, au 17e siècle. Dans un second temps, on tentera d’inscrire ces considérations en regard des discours tenus à propos de cisterciennes mortes « en odeur de sainteté » entre le 13e et le 18e siècle et dont les biographies regorgent d’allusions à leurs relations singulières aux boissons et à la nourriture. Il sera alors question d’en comprendre les significations symboliques en lien avec leur univers spirituel et culturel. [less ▲]

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See detailGrammaire matérielle et erreur de catégorie
Leclercq, Bruno ULg

Conference (2015, May 08)

Detailed reference viewed: 26 (0 ULg)
See detailPelvic pain and Endometriosis
BRICHANT, Géraldine ULg; NISOLLE, Michelle ULg

Conference (2015, May 08)

Detailed reference viewed: 15 (0 ULg)
Peer Reviewed
See detailLe travail de la figurine ou l'effet de présence en question. Notes sur les films de marionnettes d’Émile Cohl
Tomasovic, Dick ULg

Conference (2015, May 08)

Etude de l'invention du régime visuel de la figurine à travers les films de marionnettes d'Emile Cohl.

Detailed reference viewed: 15 (0 ULg)
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See detailLa construction du mouvement "Acteurs des temps présents"
Theunissen, Fanny ULg

Conference (2015, May 07)

Detailed reference viewed: 17 (0 ULg)
See detailLa grammaire des concepts chez Wittgenstein
Gauvry, Charlotte ULg

Conference (2015, May 07)

Detailed reference viewed: 7 (0 ULg)
See detail"Bon sens" et restrictions budgétaires
Counet, Maxime ULg

Conference (2015, May 06)

Detailed reference viewed: 18 (1 ULg)
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See detailTowards an extension of the catalogue of particle-accelerating colliding-wind binaries
De Becker, Michaël ULg

Conference (2015, May 05)

Particle-accelerating colliding-wind binaries (PACWBs) constitute a class of massive stars known to be able to accelerate charged particles up to relativistic velocities. The latter property is identified ... [more ▼]

Particle-accelerating colliding-wind binaries (PACWBs) constitute a class of massive stars known to be able to accelerate charged particles up to relativistic velocities. The latter property is identified mainly through the detection of synchrotron radiation in the radio domain, and in a few cases thanks to the detection of non-thermal radiation in the high energy domain. The catalogue of PACWBs contains about 40 objects, covering a wide parameter space in terms of stellar wind and orbital parameters. So far, there is no evidence for a strict criterion to justify the occurrence of a particle acceleration process only in a small fraction of the colliding-wind binaries population, admitting the possibility that it might be a frequent property among massive stars. In this contribution, I address the issue of the frequency of particle accelerators among massive binaries, and I discuss observation strategies aiming at identifying new members of the catalogue. [less ▲]

Detailed reference viewed: 48 (1 ULg)
See detailIconic turn et critique du paradigme langagier
Hagelstein, Maud ULg

Conference (2015, May 05)

Je voudrais envisager ici le problème de la légalité des significations dans le champ non-verbal du visuel, tel qu’il est envisagé par un théoricien de l’image allemand actuel (G. Boehm). On pourrait en ... [more ▼]

Je voudrais envisager ici le problème de la légalité des significations dans le champ non-verbal du visuel, tel qu’il est envisagé par un théoricien de l’image allemand actuel (G. Boehm). On pourrait en effet dégager – selon la proposition de Boehm – un principe formel (au moins) qui structure l’émergence de significations dans le domaine du visuel. Boehm ne parle de grammaire à proprement parler que pour s’en écarter (il rejette l’usage de la grammaire prédicative pour la compréhension des images). [less ▲]

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See detailPsychological processes leading to activation or avoidance: Protective and vulnerability factors to depression
Wagener, Aurélie ULg

Conference (2015, May 05)

Kinderman (2005, 2013) elaborated a psychological model of mental ill-health according to which biological, social and circumstantial factors lead to mental disorders through their conjoint effects on ... [more ▼]

Kinderman (2005, 2013) elaborated a psychological model of mental ill-health according to which biological, social and circumstantial factors lead to mental disorders through their conjoint effects on psychological processes (PP). Our research adopted the same framework. It focused on PP which characterize depression. More precisely, since inactivity (also conceptualized as behavioural avoidance) is one of the main feature of depression, the present research focused on PP which influence the behavioural avoidance (vulnerability factor to depression) and the behavioural activation (protective factor for depression). Three main aims were pursued: To investigate the influence of the biased PP on the behavioural avoidance. To find the PP which have a positive influence on the behavioural activation. To present an integration of our results with Kinderman’s model. Four hundred seventy-seven community adults (358 women, 119 men; x ̅ age = 34.25, SD = 11.85) completed an online survey assessing PP (negative repetitive thoughts, emotion regulation strategies, environmental rewards, self-image, inhibition/approach), avoidance, activation and depression. Since several questionnaires were used to assess each PP, factorial scores were computed for each one. Overall, confirmatory factor analyses highlighted that avoidance is positively linked to ruminations, negative emotion regulation strategies and poor environmental rewards and that activation is positively linked to positive self-image and high environmental satisfaction. Results will also be discussed according to the sex. According to their influence on both avoidance and activation, the environmental reward and the emotion regulation strategies appear to be important variables to work on during the treatment of depression. [less ▲]

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See detailEmbeddedness as a facilitator of sustainable entrepreneurship
Dufays, Frédéric ULg

Conference (2015, May 05)

This conceptual paper builds on stakeholder theory and the embeddedness argument to shift from the "what" to the "how" question on sustainable entrepreneurship. It shows that sustainable entrepreneurship ... [more ▼]

This conceptual paper builds on stakeholder theory and the embeddedness argument to shift from the "what" to the "how" question on sustainable entrepreneurship. It shows that sustainable entrepreneurship is a highly embedded process and that this high embeddedness facilitates the sustainability character of entrepreneurship. [less ▲]

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See detailLes tabous à l’école : quelle place pour le juge en classe ?
Grandjean, Geoffrey ULg

Conference (2015, May 05)

L’objectif de la conférence est de revenir sur le concept de tabou en le liant à différents cas concrets rencontrés en milieu scolaire. L’exposé montre la place croissante accordée aux juges face à des ... [more ▼]

L’objectif de la conférence est de revenir sur le concept de tabou en le liant à différents cas concrets rencontrés en milieu scolaire. L’exposé montre la place croissante accordée aux juges face à des tabous qui suscitent des conflits. Une réflexion politologique est proposée par rapport au phénomène de judiciarisation. [less ▲]

Detailed reference viewed: 27 (3 ULg)
See detailCobham's theorem for fractals in R^n
Leroy, Julien ULg

Conference (2015, May)

Detailed reference viewed: 2 (0 ULg)
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See detailContribution of diversified farming systems to the delivery of ecosystem services
Boeraeve, Fanny ULg; Dufrêne, Marc ULg; Dendoncker, Nicolas

Conference (2015, May)

The present contribution introduces an innovative research project analyzing farms which have encompassed a transition towards more sustainability. The project being at its premise, we shall focus the ... [more ▼]

The present contribution introduces an innovative research project analyzing farms which have encompassed a transition towards more sustainability. The project being at its premise, we shall focus the presentation on the innovative aspects of the methodology and expected outcomes with a first introduction on the context and the theoretical framework relied on. [less ▲]

Detailed reference viewed: 37 (3 ULg)
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See detailHow to choose a suitable dissolution test for BCS II drugs?
Thiry, Justine ULg; Pestieau, Aude ULg; Krier, Fabrice ULg et al

Conference (2015, May)

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See detailIdentification of antiplasmodial compounds isolated from endemic plants of Reunion Island
Ledoux, Allison ULg; Jansen, Olivia ULg; Campos, Pierre-Éric et al

Conference (2015, May)

Detailed reference viewed: 4 (1 ULg)
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See detailTHE EFFECTS OF TRICLOSAN ON HEARING DEVELOPMENT OF CYPRINODON VARIEGATUS LARVAE
Schnitzler, Joseph ULg; Benichou, Farida; Pinte et al

Conference (2015, May)

The aquatic environment represents the final sink for many chemicals, including bactericidal agents. Among them Triclosan (TCS) has been shown to affect the thyroid system of teleost. Larval stages are ... [more ▼]

The aquatic environment represents the final sink for many chemicals, including bactericidal agents. Among them Triclosan (TCS) has been shown to affect the thyroid system of teleost. Larval stages are particularly vulnerable to deleterious effects of endocrine disrupters because of potential impairment of fish development and behaviour. Thyroid hormones are critical to the development of the brain and auditory system. Thus, TCS could affect the development of the brain and hearing. The aims of this study were: to investigate hearing development in sheepshead minnows (Cyprinodon variegatus) using the ABR technique (Auditory Brainstem Response) and to investigate the effects of triclosan on hearing development. Exposure to TCS was conducted from fertilization of eggs on at concentrations likely to be found in the environment: 20, 50 and 100 μgl-1. We characterized previously the ontogenic variation of thyroid hormones in embryos and larvae of sheepshead minnows. We observed an increase of thyroid hormones level around the 12th and the 15th day post hatching (dph), that may be associated with the transition from larval to juvenile stage during the development of this species. We concluded, that this period could be defined as a critical exposure window to pollutants. We determined hearing thresholds for sheepshead minnows of different ages. Due to the small size of larvae, first measurements were only possible at 30 dph. Audiograms showed that the hearing ability is not yet completely established at 30 dph compared to adults. So we pursued our experiments in older larvae of 40, 60, 70, and 80 dph when sexual maturity is attained. First results indicate that the hearing ability considerably improves between 50 and 60 dph. The effects of TCS in this development have yet to be determined but will be fully discussed. This study proposes an interesting new endpoint in thyroid disruption research. [less ▲]

Detailed reference viewed: 40 (2 ULg)
See detailTesting of a Spacecraft Structure with Non-Smooth Nonlinearities
Renson, Ludovic ULg; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg

Conference (2015, May)

The dynamics of the SmallSat, a real-life spacecraft possessing a complex isolation device with multiple nonsmooth nonlinearities is investigated. Experiments show that nonlinearities induce modal ... [more ▼]

The dynamics of the SmallSat, a real-life spacecraft possessing a complex isolation device with multiple nonsmooth nonlinearities is investigated. Experiments show that nonlinearities induce modal interactions between modes with non-commensurate linear frequencies. A model of the structure with a simplified description of the nonlinear connections is first built using techniques available in industry. Numerical continuation is then exploited to compute nonlinear normal modes and uncover interaction phenomena that can jeopardize the structural integrity. [less ▲]

Detailed reference viewed: 21 (9 ULg)
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See detailDeposition of electrochromic oxide films by surfactant-assisted ultrasonic spray pyrolysis
Maho, Anthony ULg; Denayer, Jessica; Bister, Geoffroy et al

Conference (2015, May)

Detailed reference viewed: 21 (2 ULg)
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See detailStone tool use and hominin evolution
Fullagar, Richard; Rots, Veerle ULg

Conference (2015, May)

Detailed reference viewed: 28 (0 ULg)
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See detailDiplomacia mediática en la expropiación de YPF a Repsol: la Unión Europea y su discurso en la prensa argentina
Azpíroz Manero, María Luisa ULg

Conference (2015, May)

La diplomacia pública es una actividad diplomática y de comunicación política internacional que busca influenciar a públicos extranjeros con el fin de contribuir a logros de política exterior y/o generar ... [more ▼]

La diplomacia pública es una actividad diplomática y de comunicación política internacional que busca influenciar a públicos extranjeros con el fin de contribuir a logros de política exterior y/o generar una imagen positiva. Entre sus elementos principales se encuentran las acciones de información y comunicación estratégica (diplomacia mediática), diseñadas para transmitir el discurso político de modo efectivo y convincente. La expropiación de YPF a Repsol, en 2012, estuvo acompañada de una intensa cobertura y debate en la prensa argentina. Esta investigación plantea las siguientes preguntas: ¿cuáles fueron las acciones clave de la diplomacia mediática de la Unión Europea (UE) respecto a la expropiación?¿qué aspectos destacó el discurso de la UE?¿en qué aspectos el discurso de la UE coincidió con el discurso transmitido por la prensa argentina? Para responderlas se elabora, en primer lugar, un marco contextual sobre la expropiación de YPF y sobre la diplomacia mediática de la UE en este caso. Después, con ayuda del análisis del discurso (teoría del framing), se realiza un análisis comparativo entre el discurso de la UE y el de dos periódicos argentinos de referencia y con líneas editoriales contrapuestas: La Nación y Página 12. La investigación también incluye información obtenida en entrevistas realizadas a oficiales del Servicio Europeo de Acción Exterior (SEAE), tanto en Bruselas como en Buenos Aires. [less ▲]

Detailed reference viewed: 41 (2 ULg)
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See detailModeling of Antimicrobial Lipopeptides in interaction with lipidic membranes
Loison, Claire; Nasir, Mehmet Nail ULg; Besson, Françoise et al

Conference (2015, May)

Detailed reference viewed: 13 (0 ULg)
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See detailMatière organique et dynamique du phosphore dans les systèmes sol-plante
Renneson, Malorie ULg

Conference (2015, May)

Depuis plusieurs années, la problématique du phosphore revient sur le devant de la scène, notamment à cause du rôle qu’il joue sur l’eutrophisation des eaux de surface. C’est aussi et surtout un élément ... [more ▼]

Depuis plusieurs années, la problématique du phosphore revient sur le devant de la scène, notamment à cause du rôle qu’il joue sur l’eutrophisation des eaux de surface. C’est aussi et surtout un élément essentiel pour les cultures dont les ressources minérales sont limitées. Les matières organiques sont donc une ressource en phosphore précieuse qu’il est primordial de valoriser au mieux. Cependant, toutes les matières organiques ne sont pas égales face aux engrais minéraux, que ce soit vis-à-vis de la réponse immédiate ou à plus long terme. Certaines matières organiques présentent des vitesses de libération du phosphore comparables à celles des engrais organiques. Cependant, les effets doivent également être examinés sur la durée afin d’envisager la possibilité d’une augmentation de la fertilisation phosphatée de nos sols à l’aide des matières organiques, dont les effluents d’origine non agricoles. Il est également important de comprendre les formes sous lesquelles le phosphore va se fixer dans le sol. Le phosphore organique peut présenter des teneurs fortement variables en fonction des types de sol et de l’occupation. Il s’agit d’un compartiment à ne pas négliger dans la caractérisation d’un sol. Différentes recherches et expérimentations ont été réalisées au sein du Service sur la caractérisation et la dynamique du phosphore dans les sols, notamment dans l’objectif de mieux gérer les apports organiques dans les sols. Les questions relatives au phosphore sont en effet importantes dans un objectif de gestion durable des matières organiques et des sols. [less ▲]

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See detailLearning from blind tests: residues on grinding stones and flaked stone tools
Rots, Veerle ULg; Hayes, Elspeth; Cnuts, Dries ULg et al

Conference (2015, May)

Detailed reference viewed: 23 (2 ULg)
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See detailSoft bottom macrofauna monitoring under anthropogenic influences in Calvi bay, Corsica: Methodological simplifications
Donnay, Annick ULg

Conference (2015, May)

This work is within the framework of STARE-CAPMED long-term research program of STARESO dedicated to STAtion of Reference and rEsearch on Change of local and global Anthropogenic Pressures on ... [more ▼]

This work is within the framework of STARE-CAPMED long-term research program of STARESO dedicated to STAtion of Reference and rEsearch on Change of local and global Anthropogenic Pressures on Mediterranean Ecosystem Drifts. For the soft-bottom macrofauna topic, fourteen stations are sampled one to two times per year, along gradients from anthropogenic sources of influence (river mouth, fish farm, anchoring areas and sewage) mere 2 stations out of influences. The sorting and analysis of soft-bottom macrofauna is time consuming and some methodological simplifications are looking for. Moreover, an adaptation of the M-AMBI for the weak human impacted geographic zone, the Corsica, is envisaged by a weighting with the Piélou index. As a first time, all is done at the species level. In a second time, the steps are done at genus and family levels. By comparison of results obtained between different identification levels, the taxonomic sufficiency (TS) for the Corsican coastal waters is determined. The adapted M-AMBI calculation and TS are applied on the macrofauna populations identified in Calvi bay. It could be interesting to test the analysis process applied around Corsica on other Mediterranean areas. [less ▲]

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See detailSurface treatments for electrochromic glazing: toward reduced costs and optimal performances through ultrasonic spray pyrolysis
Maho, Anthony ULg; Denayer, Jessica; Bister, Geoffroy et al

Conference (2015, May)

Detailed reference viewed: 15 (2 ULg)
See detail"Se soulever", ou pourquoi les héritiers mobilisent-ils le droit à Cotonou?
Andreetta, Sophie ULg

Conference (2015, May)

A Cotonou, les héritiers sont de plus en plus nombreux à recourir à la justice pour résoudre les différends qui les séparent. Pourquoi convoquent-ils leur famille au tribunal ? Je reviendrai ici sur le ... [more ▼]

A Cotonou, les héritiers sont de plus en plus nombreux à recourir à la justice pour résoudre les différends qui les séparent. Pourquoi convoquent-ils leur famille au tribunal ? Je reviendrai ici sur le parcours d’une série de familles de la capitale béninoise et la manière dont certains de leurs membres mobilisent le droit lorsqu’il s’agit de gérer ou partager un héritage. Depuis 2004, la République du Bénin dispose en effet d’un nouveau Code des Personne et de la Famille qui, contrairement au droit traditionnel, insiste sur les droits des femmes et la notion d’égalité. Dans un contexte où l’héritage, sous forme de patrimoine immobilier, représente un capital financier considérable, le droit est de plus en plus souvent mobilisé par les « petits » des hiérarchies familiales qui s’estiment lésés. Comment ce nouveau Code est-il approprié par les citoyens béninois ? Que nous apprend ce type d’affaires sur les usages et les pratiques du droit dans la capitale béninoise et sur la manière dont l’Etat y transforme les rapports familiaux ? [less ▲]

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See detailOptical polarization from AGN
Hutsemekers, Damien ULg

Conference (2015, May)

I review the optical polarization properties of both low- and high-luminosity AGN, focusing on the origin of the polarization and its relation to AGN properties, in particular the geometry of the ... [more ▼]

I review the optical polarization properties of both low- and high-luminosity AGN, focusing on the origin of the polarization and its relation to AGN properties, in particular the geometry of the scattering regions. The use of polarization to follow AGN orientations along the large-scale structures will also be discussed. [less ▲]

Detailed reference viewed: 24 (0 ULg)
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See detailNanometer-scale wetting transitions in mesopores: a SAXS analysis
Gommes, Cédric ULg

Conference (2015, May)

The equilibrium and metastable configurations of confined binary liquids has been a topic of research since the early work of Liu et al. in the nineties [1]. In particular, it has been proposed ... [more ▼]

The equilibrium and metastable configurations of confined binary liquids has been a topic of research since the early work of Liu et al. in the nineties [1]. In particular, it has been proposed theoretically that liquids may coexist inside nanopores in the form of layers covering uniformly the solid surface, of plugs filling locally the pore space, or of capsules floating in the middle of the pores. In the present contribution, we report in situ synchrotron small-angle scattering (SAXS) experiments on hexane/nitrobenzene solutions confined in mesoporous carbon xerogels [2]. The SAXS shows that these systems exhibit reversible temperature-induced transitions between the layer and the plug configurations. The scattering data is analyzed using a so-called plurigaussian model, which enables us to reconstruct the configurations of the confined liquids, and quantitatively analyze the wetting transitions at the nanometer-scale in terms of changing interface areas, contact angles, and triple-line lengths. [less ▲]

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See detailPatch types in Posidonia oceanica meadows around Corsica. How can we use them in seascape ecology?
Abadie, Arnaud ULg; Bonacorsi, Marina; Gobert, Sylvie ULg et al

Conference (2015, May)

The meadows formed by the Mediterranean seagrass Posidonia oceanica are subjected to various natural (e.g., water movement, light availability, sedimentation) and anthropogenic (e.g., anchoring, trawling ... [more ▼]

The meadows formed by the Mediterranean seagrass Posidonia oceanica are subjected to various natural (e.g., water movement, light availability, sedimentation) and anthropogenic (e.g., anchoring, trawling, fish farms, explosives) phenomena that erode them and create diverse types of patches. The assemblage of the P. oceanica matrix and these patches creates particular seascapes. On the basis of this assessment, we aimed to investigate the importance of the patch type in structuring P. oceanica seascapes and to offer new prospects in the large scale studies of seagrass meadows. Five sites encompassing large P. oceanica meadows ranging from 1.86 km² to 4.42 km² along the Corsican coast (France) were considered. Eleven patch types with different sizes, shapes and origins were identified using side scan sonar images (sonograms). Five were recognized as natural and five as anthropogenic. One can be of both origins. The resolution of the sonograms allowed to detect patches of various sizes ranging from 1 m² to 111 829 m². The relation between structural characteristics of patches and the whole seascape aspect was explored using seven landscape metrics relevant for the study of meadows patchiness (patch area, mean radius of gyration, area-weighted radius of gyration, coefficient of variation of the Euclidean nearest-neighbor distance, area-weighted perimeter-area ratio, landscape division index, number of patches). Only a small number of patch types appears to play the strongest role in the characterization of the P. oceanica seascapes. Furthermore, the use of seascape structures seems to be suitable for the development of new tools like indices for the assessment of human impacts on P. oceanica meadows. In this perspective we propose a new and simple index, the Patchiness Source Index (PaSI), to estimate the origin of the patchiness (natural or anthropogenic) for a given area. A landscape approach, as well as information on patch dynamic, should be integrated in the new indices that aim to assess the state of conservation of the whole P. oceanica ecosystem. [less ▲]

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See detailDamage analysis of composite structures: simulation supported by testing
Bruyneel, Michaël ULg

Conference (2015, May)

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See detailBiscuits et thé à la menthe aux fêtes interculturelles. Entre essentialisation et participation des femmes marocaines en Italie.
Mescoli, Elsa ULg

Conference (2015, May)

Cette communication est issue d’une recherche ethnographique autour des pratiques culinaires d’un groupe de femmes marocaines résidentes dans une ville de la province de Milan, en Italie. Le matériel ... [more ▼]

Cette communication est issue d’une recherche ethnographique autour des pratiques culinaires d’un groupe de femmes marocaines résidentes dans une ville de la province de Milan, en Italie. Le matériel collecté au sein des entretiens et des observations a permis d’étudier d’un côté la définition des sujets au travers des pratiques alimentaires, d’un autre côté leur modalité de prendre part à la vie sociale locale. Grâce aux activités de la vie quotidienne, une appartenance culturelle et religieuse peut être affirmée, en permettant ainsi la revendication du « droit à la diversité ». La performance publique des pratiques culinaires permet aux femmes considérées d’exercer une agency à l’intérieur des espaces institutionnellement concédés à l’expression des migrants. Lors des fêtes interculturelles, les rituels d’une sorte de « cannibalisme exogène » se mettent en place : la population majoritaire, en goûtant les plats des Autres, incorpore la diversité afin de la contrôler. Néanmoins, les femmes migrantes en charge des préparations choisissent activement quels ingrédients (du soi et des plats) faire consommer, en présentant ainsi certains aspects qui vont au-delà de la culture alimentaire. Le partage de nourriture leur permet d’assumer un rôle actif dans la communauté locale, tout en affirmant leurs propres spécificités. Les femmes considérées acquièrent une position politiquement importante au sein de la société et sont ainsi légitimées à participer aux débats et décisions autour de certains questions clefs de la pratique de la diversité. [less ▲]

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See detailDo Customers Dare to Share? Exploring Risk Perception and Reduction in Access-Based Services
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

Conference (2015, May)

Detailed reference viewed: 28 (2 ULg)
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See detailSearching for early traces of fire production on flint tools
Sorensen, Andrew; Rots, Veerle ULg

Conference (2015, May)

Detailed reference viewed: 11 (0 ULg)
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See detailCerebral FDG uptake changes with supraorbital transcutaneous electrical stimulation for episodic migraine prevention
D'Ostilio, Kevin ULg; Thibaut, Aurore ULg; Laureys, Steven ULg et al

Conference (2015, May)

Background: A recent multicentre RCT has shown that supraorbital transcutaneous stimulation (STS) targeting branches of the ophtalmic nerve with the Cefaly® device is effective as a preventive therapy for ... [more ▼]

Background: A recent multicentre RCT has shown that supraorbital transcutaneous stimulation (STS) targeting branches of the ophtalmic nerve with the Cefaly® device is effective as a preventive therapy for migraine (Schoenen et al., Neurology 2013). However, the mechanisms of action in the central nervous system remain unknown. Here, we conducted voxel-based analyses of [18]FDG-PET to evaluate metabolic changes immediately after the first STS session and after 3 months of treatment in patients with migraine. Methods: Twenty-eight subjects participated in the experiment: 14 patients with episodic migraine (ICHD3 beta criteria) and 14 age-matched controls. Healthy volunteers underwent only one [18]FDG-PET scan whereas patients were scanned at baseline, directly after a first session of STS and after 3 months of daily treatment. Results: Compliant patients showed a significant decrease in the number of attacks (p = 0.03). When compared to controls, patients (n = 14) at baseline were hypometabolic in the fronto-temporal regions (p < 0.001), especially in the orbitofrontal (OFC) and perigenual anterior cingulate cortex. OFC hypometabolism was not correlated with medication intake. In compliant patients, daily STS for 3 months was followed by a normalization of the fronto-temporal hypometabolism (p< 0.001; OFC: pFWE<0.01). Conclusion: Our study suggests that the OFC is hypoactive in episodic migraine. STS with the Cefaly° device is able to normalize this hypoactivity. This indicates that STS exerts its beneficial effect via slow neuromodulatory mechanisms, as also previously shown for percutaneous occipital nerve stimulation in refractory cluster headache (Magis et al., BMC Neurology 2011). [less ▲]

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See detailStock de matières organiques dans les sols agricoles wallons: état des lieux et tendances
Renneson, Malorie ULg

Conference (2015, May)

Créée en 1994, la base de données de REQUASUD constitue une source d’information importante de l’état des sols en région wallonne. A ce jour, elle est constituée de plus de 420 000 échantillons répartis ... [more ▼]

Créée en 1994, la base de données de REQUASUD constitue une source d’information importante de l’état des sols en région wallonne. A ce jour, elle est constituée de plus de 420 000 échantillons répartis sur l’ensemble du territoire wallon. Ils sont issus des analyses de terre réalisées à la demande des agriculteurs et des particuliers par les laboratoires wallons d’analyse de terre du réseau REQUASUD. Trois synthèses de l’état des sols en région wallonne ont été réalisées à ce jour (périodes 1994-1997, 1998-2002 et 2003-2008). Ces synthèses permettent en premier lieu de réaliser des cartes des teneurs en carbone organique total (COT) par région agricole et par principaux types de sol. Les cartes du statut organique tendent à mettre en évidence des différences importantes entre les régions agricoles. Une relation entre la distribution des taux de COT dans les sols cultivés et le relief est perceptible. Cela permet de confirmer l’existence d’un lien entre les taux de carbone et le climat. Il ne faut cependant pas non plus négliger l’aspect lié à l’intensification des productions agricoles. En outre, des évolutions temporelles peuvent être mises en évidence. La comparaison des moyennes entre 1994 et 2008 a permis de détecter une diminution du COT dans 3 régions agricoles : les régions jurassique (-15,3%), herbagère (-12,9%) et limoneuse (-6,5%). C’est dans cette dernière région que la situation est la plus préoccupante car le taux de COT y est très faible. Une attention toute particulière doit être portée à cette évolution car si la tendance à la baisse continue, cela pourrait devenir problématique. [less ▲]

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See detailLes réseaux scientifiques du Roi en Belgique
Pirot, Pascal ULg

Conference (2015, April 30)

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See detailFrom Loose to Boxed Fragments (and Back Again). Seriality, the Graphic Novel, and Chris Ware’s "Building Stories"
Crucifix, Benoît ULg

Conference (2015, April 29)

While comics have consistently explored modes of seriality for the past century, serialization has been drastically dwindling. Under the aegis of the graphic novel, North-American comics production has ... [more ▼]

While comics have consistently explored modes of seriality for the past century, serialization has been drastically dwindling. Under the aegis of the graphic novel, North-American comics production has been increasingly redefined around the self-contained one-shot, published in book format. While many alternative cartoonists have abandoned periodical publication, Chris Ware nonetheless keeps holding on to this practice and has redefined it in interesting ways. Yet, this aspect is frequently overlooked by critics and scholars. After situating Ware's "Building Stories" with respect to these recent changes in the comics field, I will argue that seriality is central to the heterogeneous structure of Ware's box-of-comics. Its highly dispersed and fragmentary publication history indeed feeds into the physicality of the box, on both material and narrative levels, replicating a discontinuous and open-ended reading experience. "Building Stories" foregrounds its status as a collection of fragments: in doing so, it reclaims the serial heritage of comics and the reading practices that, according to Jared Gardner, have made comics particularly relevant for twenty-first-century storytelling. [less ▲]

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See detailRural development through the introduction of improved goats: case of Attapeu, Lao PDR
Andres, Ludovic ULg; Nguyen Cong, Oanh; Dinh Van, Tong et al

Conference (2015, April 29)

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See detailWhat does Radius stand for? Issues and learning from the creation of an institutional reporting comittee in a university
Hoerner, Céline ULg; Bachelet, Jean-François ULg

Conference (2015, April 29)

The contemporary university has to deal with an important pressure in order to adopt an operating and organisational system from the companies. The university is now encouraged to reconcile efficacy and ... [more ▼]

The contemporary university has to deal with an important pressure in order to adopt an operating and organisational system from the companies. The university is now encouraged to reconcile efficacy and financial viability goals in a competitive context between institutions. On the basis of a case study undertaken in a french--¿speaking Belgian university, we will think about the way dashboards and institutional reporting enable the university to respond to change injunctions, how they constitute a strategic management support, as well as the effects of their implementation in the administrative organisation. We will explain why Radius has been created at the university, its structure and how it works. We will see that its impact has been significant on the institution¿s staff. The creation of Radius, which aroused misgivings from administrations who have lost some of their prerogatives, reflects a shift of the administrative activity, whose part of the power is now concentrated in the hands of the authorities. [less ▲]

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See detailFunctions of binary variables
Crama, Yves ULg

Conference (2015, April 29)

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See detailComplexes et complexions de Mach à Meinong
Zincq, Aurélien ULg

Conference (2015, April 27)

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See detailAge at Retirement: New Proxy of Cognitive Reserve? Results from a French Population-Based Study
Grotz, Catherine ULg; Meillon, Céline; Amieva, Hélène et al

Conference (2015, April 25)

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See detailLes méthodes de prise en charge et de rééducation cognitives
DELRUE, Gaël ULg

Conference (2015, April 25)

Présentation des méthodes de prise en charge neurocognitives de patients traumatisés crâniens légers.

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See detailWerner Herzog et Alexander Kluge. Regards croisés sur le Nouveau Cinéma Allemand.
Hamers, Jérémy ULg

Conference (2015, April 25)

Alexander Kluge et Werner Herzog sont assurément deux figures antipodiques dans l’histoire du cinéma allemand. L’engagement politique tout d’abord, indissociable de la création audiovisuelle pour le ... [more ▼]

Alexander Kluge et Werner Herzog sont assurément deux figures antipodiques dans l’histoire du cinéma allemand. L’engagement politique tout d’abord, indissociable de la création audiovisuelle pour le premier, objet de méfiance si pas de rejet pour le second, oppose manifestement ces deux figures de proue du Nouveau Cinéma Allemand, un courant dont l’acte de naissance, le manifeste d’Oberhausen de 1962, coïncide avec les débuts cinématographiques des deux auteurs. Leurs esthétiques respectives ensuite confirment le gouffre irréductible qui semble les séparer. Enfin, auteurs l’un et l’autre d’œuvres théoriques sur le cinéma, ils défendent deux approches réflexives de la création audiovisuelle qui apparaissent a priori comme inconciliables. En première lecture, Kluge et Herzog incarnent donc toute l’hétérogénéité bien connue du Nouveau Cinéma Allemand. À rebours de ce constat largement répandu dans les histoires de ce courant cinématographique, et sans pour autant réconcilier les deux auteurs à tout prix, un regard croisé sur quelques-uns de leurs films (e.a. Gelegenheitsarbeit einer Sklavin et Die Artisten in der Zirkuskuppel : ratlos pour Kluge ; Fata Morgana et Fitzcarraldo pour Herzog) et textes (e.a. les écrits d’Ulm de Kluge et la déclaration du Minnesota de Herzog) permet de dégager plusieurs points de rencontre entre les œuvres des deux cinéastes. Partant plus particulièrement de leurs conceptions de la rencontre entre documentaire et fiction, rencontre essentielle pour l’un comme pour l’autre, il s’agira d’en dégager les similitudes et résonances pour mieux comprendre, grâce à un éclairage réciproque, l’une et l’autre de ces œuvres essentielles du cinéma allemand des années soixante, septante et quatre-vingt. [less ▲]

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See detailRenal ischemia/reperfusion decreases the expression of DPP-4
Rowart, Pascal ULg; ERPICUM, Pauline ULg; Defraigne, Jean-Olivier ULg et al

Conference (2015, April 24)

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See detailGoing Mad From Pain in Caryl Phillips’s Fiction
Mascoli, Giulia ULg

Conference (2015, April 24)

This paper deals with Caryl Phillips, whose fiction gives a voice to those who were silenced by history: lonely, marginalized characters such as Caribbean female migrants or Christianized slaves trying to ... [more ▼]

This paper deals with Caryl Phillips, whose fiction gives a voice to those who were silenced by history: lonely, marginalized characters such as Caribbean female migrants or Christianized slaves trying to convert their own people. Tales of family disruption, displacement, dis-membering, dispossession, loss are at the heart of his work. No wonder therefore if many of his characters, regardless of their gender, location or the time that they live in, enter the “realm of madness” as an ultimate exit from the unbearable pain of their lives. My proposal is to concentrate on Leila from The Final Passage (1985), Irina from Higher Ground (1989), Emily from Cambridge (1991) and Martha from Crossing the River (1993). These characters are motherless, husbandless and except for Leila, childless. Their traumatizing experiences, including a miscarriage, the birth of a stillborn baby, separation because of slavery, lead these four women to lose touch with reality, the pain driving them literally “crazy”. However, except for Martha, their “insanity”, momentary or definitive, opens the way to the logos which is uttered even if it disrupts the normative, patriarchal/colonialist society. Society’s silencing of these characters goes together with its inclination to associate mental disturbance with the realm of sound: hearing voices, shouting, screaming, repeated utterance. This sonic tendency is mirrored in Phillips’s writing. During the characters’ hallucinations, some passages create an aural experience alluding to their trauma, as some structural units are repeated over and over again. My contention is that these narrative devices transfer the characters’ chaotic experience into the writing and create a sense of confusion in the reader which privileges immediate empathy. [less ▲]

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See detailHighlights on CRISPR-Cas 9: from bacteria to eukaryotic cells
Barez, Pierre-Yves ULg; Hamaïdia, Malik ULg; Willems, Luc ULg

Conference (2015, April 24)

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See detailKidney function and cardiac surgery
Krzesinski, Jean-Marie ULg

Conference (2015, April 24)

High prevalence of the problem in part due to ageing with CKD - Consequences for the patient and the economy of health - Danger of CKD development or aggravation, mortality Need for early diagnosis (new ... [more ▼]

High prevalence of the problem in part due to ageing with CKD - Consequences for the patient and the economy of health - Danger of CKD development or aggravation, mortality Need for early diagnosis (new biomarkers?) but not yet proof of efficacy for prevention. Useful for predicting prognosis? Prevention first: interval between contrast agents use and surgery, caution about medical therapy, fluid volume balance, importance of the kind of solution used, quality of the CBP! Treatment: avoid complications when AKI installed, nutrition ! Early RRT (?)(rapid uremic control or fluid balance?) but high mortality even after hospital discharge (max 1/3 survival at 1 y) [less ▲]

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See detailDocuments officiels romains d’époque républicaine et du Principat d’Auguste
Famerie, Etienne ULg

Conference (2015, April 23)

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See detailRetour au travail après un cancer du sein
Mairiaux, Philippe ULg; Schippers, Nathalie ULg; DESREUX, Joëlle ULg et al

Conference (2015, April 23)

Detailed reference viewed: 48 (8 ULg)
See detailAnatomy of the Rectum and the sigmoid
Bonnet, Pierre ULg

Conference (2015, April 22)

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See detailBladder relations: arteries, veins, nerves
Bonnet, Pierre ULg

Conference (2015, April 22)

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See detailRééducation pluridisciplinaire des patients en externe
BENMOUNA, Karim ULg

Conference (2015, April 21)

Modalités de prise en charge en rééducation pluridisciplinaire des patients en externat sur le site du CHU de Liège.

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See detailPelvic neuroanatomy
Bonnet, Pierre ULg

Conference (2015, April 21)

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See detailDoctors, Nurses and Patients 2.0: Myth or Reality?
Slomian, Cynthia ULg

Conference (2015, April 21)

This communication aims at drawing the general context underlying the Belgian health care sector and to address the key issues of the computerization of the patient health records. Two case studies are ... [more ▼]

This communication aims at drawing the general context underlying the Belgian health care sector and to address the key issues of the computerization of the patient health records. Two case studies are presented: the introduction of a nursing health record within a hospital and the computerization of the general practitioner's record. Finally, the discussion focuses on the medical knowledge in general, using the embodied, inscribed, enacted phenomenology developed by Richard Freeman and Steven Sturdy. [less ▲]

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See detailThe vascular anatomy of the para-aortic spaces
Bonnet, Pierre ULg

Conference (2015, April 21)

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See detailThe paravesical and para rectal space, parameter and paracervix
Bonnet, Pierre ULg

Conference (2015, April 21)

Detailed reference viewed: 9 (0 ULg)
See detailThe anatomy of the internal iliac artery
Bonnet, Pierre ULg

Conference (2015, April 20)

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See detailThe path of the ureter
Bonnet, Pierre ULg

Conference (2015, April 20)

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See detailAnterolateral inferior abdominal wall anatomy: nerves and vessels.
Bonnet, Pierre ULg

Conference (2015, April 20)

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See detailPelvic anatomy, a constructive approach
Bonnet, Pierre ULg

Conference (2015, April 20)

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See detailCentral Pelvic spaces: Limits, content & landmarks
Bonnet, Pierre ULg

Conference (2015, April 20)

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See detailThermodynamik und Reaktions-Technik am Beispiel PA12
Pfennig, Andreas ULg; Haas, Thomas

Conference (2015, April 18)

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See detailBrazil’s South South Cooperation with Africa : a win win Relationship ? The case of biofuel production in Mozambique
Cusson, Gabrielle ULg

Conference (2015, April 18)

Since Lula’s presidency, South-South development cooperation (SSDC) has been at the heart of Brazil foreign policy priorities. Brazil is now recognized as an emerging actor in international development ... [more ▼]

Since Lula’s presidency, South-South development cooperation (SSDC) has been at the heart of Brazil foreign policy priorities. Brazil is now recognized as an emerging actor in international development cooperation considering its financial investments and the deployment of its many technical cooperation projects. Despite its cooperation in its own region, Brazil mobilizes a considerable amount of resources towards SSDC in Africa, and especially in Portuguese speaking countries, where it develops a “solidarity diplomacy”. Among the many technical cooperation partnerships, two fields of SSDS are considered as priorities for Brazil in Africa; agriculture and biofuels production. Being one of the world most important agricultural producer and exporter and due to the fast growing of its agribusiness industry, Brazil possess a specific expertise he wishes to share with Africa to support its agricultural revolution and to insure its food and energy security. Therefore, Mozambique has been identified as a privileged partner to develop agricultural projects, including biofuels production. Among others, ProSAVANA, a trilateral cooperation project developed in collaboration with Japan, is a very important, but controversial project. Being an emerging country, Brazil has its own strategic, political and commercial interests. Therefore, it is relevant to ask ourselves if an emerging country can deploy a selfless SSDC policy and establish a win win relationship? Is Brazil’s SSDC policy motivated by principles of solidarity or is more of a tool to consolidate its status as a global power? This papers wishes to analyses the real motivations behind Brazil’s SSDC towards Africa. [less ▲]

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See detailLire les textes informatifs au début du secondaire : d’un dispositif didactique à l’étude de l’activité des élèves et à l’accompagnement du travail d’appropriation/transformation des enseignants
De Croix, Séverine ULg; Wyns, Marielle

Conference (2015, April 17)

Notre intervention s’appuie sur les premières données issues d’une recherche de type quasi expérimental , subventionnée par la Fondation Louvain (UCL – Louvain-la-Neuve), qui porte sur l’enseignement ... [more ▼]

Notre intervention s’appuie sur les premières données issues d’une recherche de type quasi expérimental , subventionnée par la Fondation Louvain (UCL – Louvain-la-Neuve), qui porte sur l’enseignement, dans l’ordinaire de la classe, des pratiques de lecture et d’écriture des textes informatifs requises pour réussir à l’école (Bautier et Rayou, 2009 ; Crinon, 2011). « Lirécrire pour apprendre » a pour objectifs (1) d’expérimenter, durant deux années scolaires consécutives, un programme didactique conçu comme une réponse à la prise en charge de difficultés langagières que rencontrent de nombreux élèves face aux usages proprement scolaires des écrits documentaires ; (2) de tester la validité de cet outil auprès d’un échantillon constitué de 90 classes de français du premier degré ( Cèbe & Goigoux, 2007) et (3) d’évaluer les conditions d’implémentation et de mise en œuvre du programme (en termes de formation et d’accompagnement des enseignants) les plus à même de favoriser et de maintenir le changement pédagogique (Rowan & Miller, 2007 ; Dumay, 2009). Dans le cadre de cette communication, nous nous proposons de déplier succinctement les difficultés de lecture et d’écriture identifiées en amont de la conception des cinq modules du programme et de présenter les leviers d’action mobilisés au sein de ceux-ci. Le cœur de la contribution portera ensuite sur l’examen de verbalisations et de traces écrites de l’activité des élèves à l’occasion des deux premiers modules du programme mis en œuvre, intitulés « Se familiariser avec les usages des écrits à visée informative, explicative et justificative » et « Sélectionner des informations dans un ou plusieurs texte(s) et les lier entre elles ». Notre analyse des diverses verbalisations générées par ces modules vise la description qualitative de l’activité des élèves en réaction à l’outil pédagogique que nous introduisons et aux supports et documents qu’ils sont amenés à exploiter. Sera également abordée la question de l’appropriation de l’outil par les enseignants. L’examen des verbalisations produites par ces derniers au cours des séances d’accompagnement (dont bénéficient six équipes partenaires) permettra d’observer les écarts et les lieux de convergence entre, d’une part, les pratiques habituelles des enseignants et, d’autre part, les supports et activités proposés par le programme. Nous verrons dans quelle mesure l’implémentation de l’outil didactique dans les classes amène les enseignants à questionner leurs propres postures, à identifier et à mettre en œuvre des gestes professionnels susceptibles de développer chez l’élève des démarches adaptées à la lecture/écriture de textes informatifs. [less ▲]

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See detailBasement depth and sedimentary infill from deep seismic reflection data at the western tip of the offshore Corinth Rift
Beckers, Arnaud ULg; Tripsanas, Efthymios; Hubert, Aurelia ULg et al

Conference (2015, April 17)

The Corinth rift is a young continental rift located in central Greece. The active part of the rift forms an E-W striking depression – the Gulf of Corinth – that is the deepest in its central part ... [more ▼]

The Corinth rift is a young continental rift located in central Greece. The active part of the rift forms an E-W striking depression – the Gulf of Corinth – that is the deepest in its central part. Extensive seismic surveys have imaged the basin's basement and allowed to estimate the total extension across most of the Gulf except its western tip. Extension is high in the central part and decreases westward and eastward, as reflected in the present-day bathymetry. Two decades of GPS measurements have shown that the extension rate increases westwards from ~5 to 10-15 mm yr-1, but this is not consistent with the long term pattern. However, no data allowed so far to estimate the basement depth at the western tip of the Gulf, where the geodetic extension rate is the largest. Such data would allow to check the apparent inconsistency between the present rate and the long-term estimates of crustal extension. We present here an unpublished multichannel seismic line dating from 1979 and crossing the western tip of the Gulf of Corinth. The line is 22 km long and strikes WNW-ESE, from the Mornos delta to the West-Channel fault. A Maxipulse source has been used, allowing to image the basement below the synrift sedimentary infill. To the east, a ~1.6 km deep basin is imaged between the southern margin of the Gulf and an inactive south-dipping fault located between the Aigion and the Trizonia faults. The sedimentary infill consists in an alternation between basin-focused bodies made of incoherent reflections and more extensive high-amplitude reflectors. Attributing this alternation to eustatic variations give an age of 300-350 ka to the oldest well imaged deposits. Northwest of the Trizonia fault, the basement is imaged at shallower depth, i.e. ~450 m. The western tip of the seismic line reaches the Mornos delta, close to the northern shoreline. There, the depth to the basement is larger, reaching ~1.2 km. The infill is made of 3 units : on the basement lies a thin unit of incoherent reflections that may corresponds to coarse-grained fluvial deposits. A second unit of parallel, high-amplitude, low-frequency reflections could represent deeper-water deposits. The last seismic unit represents the Mornos delta coarse-grained deposits, from 0 to ~0.7 km deep. The depth of the basement deduced from this seismic line at the western tip of the Gulf of Corinth (1.2-1.6 km) is shallower than the one in the central part of the Gulf (2.5-3 km). This reinforce the inconsistency between long-term and short-term rates of extension in the Corinth Rift, which may be explained by assuming that the Western Corinth Rift initiated much later than the Central Rift. These data also allow to constrain the total displacement on the N-dipping Psathopyrgos fault, one of the major, normal, basin-bounding faults at the western tip of the Rift. The total offset would reach 2.1-2.3 km and the uplift/subsidence ratio would be ~1:1.7, implying a slip rate of 2.2-2.5 mm yr-1 based on footwall uplift rate data. [less ▲]

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See detailTSP model for electric vehicle deliveries, considering speed, loading and path slope.
Bay, Maud ULg; Limbourg, Sabine ULg

Conference (2015, April 17)

In the current Transport White Paper, the European Union presents a roadmap for a more competitive and sustainable European transport system. Concerning Urban Freight Transport, responsible for about a ... [more ▼]

In the current Transport White Paper, the European Union presents a roadmap for a more competitive and sustainable European transport system. Concerning Urban Freight Transport, responsible for about a quarter of CO2 emissions of the transport sector, one of the goals of the EU is to achieve essentially CO2-free city logistics in major urban centres by 2030 by developing and deploying new and sustainable fuels and propulsion systems. The gradual phasing out of ‘conventionally-fuelled’ vehicles from the urban environment contributes to reduce oil dependence, greenhouse gas emissions and local air and noise pollution. To meet European air quality standards, authorities of some major European cities have already introduced Low Emissions Zones where access to urban areas is limited to freight vehicles that meet certain emissions standards. Greater use of low-emission urban trucks based on electric, hydrogen and hybrid technologies would reduce air emissions, but also noise, letting to use road infrastructure more efficiently by making night deliveries and avoiding morning and afternoon peak periods. In addition to their role in the reduction of polluting emissions, the development of low-emission vehicles also allows to mitigate the dependence of the transportation sector to high fossil fuel prices. Electric vehicles have the potential to be powered by renewable energy sources such as wind and solar energy. However, weaknesses can be found in the limited capacity of the battery and the time needed to recharge, and consequently, the limited driving range of electric vehicle. The main sources for final energy consumption are the vehicle size and the engine characteristics, the load factor, the driving pattern, the gradient which represent the average topology of the country, the speed and the acceleration. To maximize the driving range, a routing model, which aims at minimizing the energy consumption, has to be developed. Our paper focus on the Electric Vehicle Traveling Salesman Problem (EV-TSP): given n cities, find the shortest tour, i.e., the shortest directed cycle containing all cities. The classical objective is to minimize the cost tour scheduling to fulfill delivery requests at each location. In this paper we consider the energy cost and we present an extension of the classical problem to minimize the remaining storage capacity of all electric vehicles at the destination node, knowing that there is no recharge operation on the tour. The objective function accounts not just for the travel distance but also on the load of the vehicle and on its speed while the energy consumption of the engine additionally depends on the path to travel, on the slope of the roads and on the vehicle specifications. Moreover, negative consumption that may happen due to regenerative breaking and kinetic energy capture on downhill paths is taken into consideration. Mathematical model is described and computational experiments are performed. [less ▲]

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See detailHolocene palaoenvironmental records in PN speleothem (Han-sur-Lesse cave, southern Belgium
Allan, Mohammed ULg; Fagel, Nathalie ULg; Verheyden, Sophie

Conference (2015, April 16)

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See detailSnow cover evolution during the last fifty years in the Hautes Fagnes (Belgium) using the regional climate MAR model
Wyard, Coraline ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2015, April 16)

The MAR model is a regional climate model originally developped for the polar regions to study the surface mass balance. In this study, the MAR model has been adapted to Belgium in order to study the snow ... [more ▼]

The MAR model is a regional climate model originally developped for the polar regions to study the surface mass balance. In this study, the MAR model has been adapted to Belgium in order to study the snow cover evolution of the Hautes Fagnes (south-east of Belgium), a region covered by snow one to two months per year. As validation, we have sucessfully compared MAR based daily snow heights with snowcam-based observations. Then, the model has been forced by ERA-Interim since 1958 to study the snow cover evolution during the last fifty years at the summit of Belgium. The results show non-significant trend. [less ▲]

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See detailFirst evidence of Neandertal cannibalism in Northern Europe: the case of the “Troisieme Caverne” of Goyet (Belgium)
Rougier, H.; Crevecoeur, I.; Beauval, C. et al

Conference (2015, April 15)

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See detailOcean Modeling: Bias correction through stochastic forcing.
Canter, Martin ULg; Barth, Alexander ULg

Conference (2015, April 14)

With this work, we aim at developping a new method of bias correction using data assimilation. This method is based on the stochastic forcing of a model to correct bias. First, through a preliminary run ... [more ▼]

With this work, we aim at developping a new method of bias correction using data assimilation. This method is based on the stochastic forcing of a model to correct bias. First, through a preliminary run, we estimate the bias of the model and its possible sources. Then, we es- tablish a forcing term which is directly added inside the model’s equations. We create an ensemble of runs and consider the forcing term as a control variable during the assimilation of observations. We then use this analysed forcing term to correct the bias of the model. Since the forcing is added inside the model, it acts as a source term, unlike external forcings such as wind. This procedure has been developed and successfully tested with a twin experiment on a Lorenz 95 model. Indeed, we were able to estimate and recover an artificial bias that had been added into the model. This bias had a spatial structure and was constant through time. The mean and behaviour of the corrected model corresponded to those the reference model. It is currently being applied and tested on the sea ice ocean NEMO LIM model, which is used in the PredAntar project. NEMO LIM is a global and low resolution (2 degrees) coupled model (hydrodynamic model and sea ice model) with long time steps allowing simulations over several decades. Due to its low resolution, the model is subject to bias in area where strong currents are present. We aim at correcting this bias by using perturbed current fields from higher resolution models and randomly generated perturbations. The random perturbations need to be constrained in order to respect the physical properties of the ocean, and not create unwanted phenomena. To construct those random perturbations, we first create a random field with the Diva tool (Data-Interpolating Variational Analysis). Using a cost function, this tool penalizes abrupt variations in the field, while using a custom correlation length. It also decouples disconnected areas based on topography. Then, we filter the field to smoothen it and remove small scale variations. We use this field as a random stream function, and take its derivatives to get zonal and meridional velocity fields. We also constrain the stream function along the coasts in order not to have currents perpendicular to the coast. The randomly generated stochastic forcing are then directly injected into the NEMO LIM model’s equa- tions in order to force the model at each timestep, and not only during the assimilation step. The first results on a twin experiment with the NEMO LIM model will be presented. [less ▲]

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See detailRecent increase of ethane detected in the remote atmosphere of the Northern Hemisphere
Franco, Bruno ULg; Bader, Whitney ULg; Bovy, Benoît ULg et al

Conference (2015, April 13)

Ethane (C2H6) has a large impact on tropospheric composition and air quality because of its involvement in the global VOC (volatile organic compound) – HOx – NOx chemistry responsible for generating and ... [more ▼]

Ethane (C2H6) has a large impact on tropospheric composition and air quality because of its involvement in the global VOC (volatile organic compound) – HOx – NOx chemistry responsible for generating and destroying tropospheric ozone. By acting as a major sink for tropospheric OH radicals, the abundance of C2H6 influences the atmospheric content of carbon monoxide and impacts the lifetime of methane. Moreover, it is an important source of PAN, a thermally unstable reservoir for NOx radicals. On a global scale, the main sources of C2H6 are leakage from the production, transport of natural gas loss, biofuel consumption and biomass burning, mainly located in the Northern Hemisphere. Due to its relatively long lifetime of approximately two months, C2H6 is a sensitive indicator of tropospheric pollution and transport. Using an optimized retrieval strategy (see Franco et al., 2014), we present here a 20-year long-term time series of C2H6 column abundance retrieved from ground-based Fourier Transform InfraRed (FTIR) solar spectra recorded from 1994 onwards at the high-altitude station of Jungfraujoch (Swiss Alps, 46.5° N, 3580 m a.s.l.), part of the Network for the Detection of Atmospheric Composition Change (NDACC, see http://www.ndacc.org). After a regular 1994 – 2008 decrease of the C2H6 amounts, which is very consistent with prior major studies (e.g., Aydin et al., 2011; Simpson et al., 2012) and our understanding of global C2H6 emissions, trend analysis using a bootstrap resampling tool reveals a C2H6 upturn and a statistically-significant sharp burden increase from 2009 onwards (Franco et al., 2014). We hypothesize that this observed recent increase in C2H6 could affect the whole Northern Hemisphere and may be related to the recent massive growth in the exploitation of shale gas and tight oil reservoirs. This hypothesis is supported by measurements derived from solar occultation observations performed since 2004 by the Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) instrument and at other NDACC sites, namely Toronto (44° N) and Thule (77° N). Indeed, the recent rates of changes characterizing these data sets are consistent in magnitude and sign with the one derived from the FTIR measurements at Jungfraujoch. In contrast, the ethane time series form Lauder (45° S) shows a monotonic decrease over the last two decades. Investigating both the cause and impact on air quality of the C2H6 upturn should be a high priority for the atmospheric chemistry community. [less ▲]

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