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See detailProbability of detection and positioning error of a hydro acoustic telemetry system in a fast-flowing river: intrinsic and environmental determinants
Bergé, Julien; Capra, Hervé; Pella, Hervé et al

in Fisheries Research (2012), 125-126

In situ fixed acoustic telemetry methods make it possible to study simultaneously the detailed movements of individual fish and their relationship to the environment, but the properties of these methods ... [more ▼]

In situ fixed acoustic telemetry methods make it possible to study simultaneously the detailed movements of individual fish and their relationship to the environment, but the properties of these methods is little known in harsh physical conditions. We examined the probability of tag detection by the system and the positioning error for detected tags of an existing telemetry system installed with 32 fixed hydrophones in a reach of the fast-flowing Rhône River in France. The reach was 1.8 km long and had heterogeneous thermal and hydraulic conditions described by a two-dimensional hydraulic model. We compared positions detected by the system with true positions estimated using a tachometer or a differential GPS, for various sets of experimental tag emissions. We analyzed how the probability of detection and the positioning error were affected by user-defined variables and three groups of environmental variables describing the configuration of the hydrophones around tag position, the physical environment at tag position and the reception quality. Tag emissions from the center channel had an average probability of detection (40-50%) higher than emissions originating from positions close to the banks, and were positioned with smaller average errors (3-5 m). The probability of detection of emissions typically varied between near 0% and 80% with configuration variables (density of surrounding hydrophones and location of tag relative to the hydrophones) and also decreased in the presence of coarse substrate. The positioning error was mainly reduced when user-defined variables of the triangulation software were set by an expert user. Configuration variables also influenced the positioning error with weaker effects than those observed for detection probability. [less ▲]

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See detailWeb-building spiders and blood-feeding flies as prey of the notch-eared bat (Myotis emarginatus)
Kervyn, Thierry; Godin, Marie Céline; Jocqué, Rudy et al

in Belgian Journal of Zoology (2012), 142(1), 59-67

Conservation of the endangered notch-eared bat (M. emarginatus) requires a specific action plan based on precise ecological requirements of this species. The analysis of the diet of three colonies in ... [more ▼]

Conservation of the endangered notch-eared bat (M. emarginatus) requires a specific action plan based on precise ecological requirements of this species. The analysis of the diet of three colonies in southern Belgium revealed: (1) spatial and seasonal variations of the diet; (2) the consumption of web-building spiders (Araneus diadematus, A. triguttatus, Cyclosa conica, Enoplognatha sp., Larinioides patagiatus, Neriene emphana); (3) the predominance of blood-feeding dipterans in the diet (Stomoxys calcitrans and Musca autumnalis). Since the populations of these two ectoparasitic flies are sensitive to the use of antiparasitic drugs, these drugs should be used with caution by farmers and veterinarians in the vicinity of maternity colonies. [less ▲]

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See detailLa voix dysphonique: L'impact négatif sur l'élève
Morsomme, Dominique ULg; Minel, Laura; Verduyckt, Ingrid

in Ortho Magazine (2012), 98

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See detailLe chaînon manquant. Lotze, Cook Wilson et la naissance du réalisme d'Oxford
Boccaccini, Federico ULg

Scientific conference (2012, January)

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See detailGéologie: notes de cours
Poty, Edouard ULg

Learning material (2012)

Notes du cours de géologie de 1 bac en géologie et de 2 bac en géographie. Etude du cycle géologique

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See detailDans quelles conditions l’évaluation des compétences par ordinateur est-elle valide et fiable ?
Detroz, Pascal ULg

Conference (2012, January)

Avec les avenues qu’offre le Web2.0, le processus d’évaluation des apprentissages en éducation/formation pourrait subir des transformations auxquelles on n’osait penser il y a très peu de temps. Il est ... [more ▼]

Avec les avenues qu’offre le Web2.0, le processus d’évaluation des apprentissages en éducation/formation pourrait subir des transformations auxquelles on n’osait penser il y a très peu de temps. Il est ainsi fort possible que la contribution humaine à ce processus soit toute autre que celle que les étudiants du XXe siècle ont connue. Mais ces transformations à venir du processus d’évaluation et de ses objets signifient-elles qu’il y aura un prix à payer en termes de validité et de fidélité ? Ainsi, l’entrée en jeu de nouveaux outils pour observer et recueillir des données sur les compétences développées pose des défis particuliers parce que dans une approche par compétence ce qui doit être évalué diffère passablement de ce qui est valorisé lorsque les seules connaissances sont visées. L’effervescence observée à cet égard est ainsi une bonne occasion pour faire le point sur ce qu’il est possible de faire pour évaluer des compétences en utilisant l’ordinateur (i.e. les TIC) et sur la validité et la fidélité du processus d’évaluation dans ce contexte. [less ▲]

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See detailMiR-146a an angiostatic miRNA elevated in peripartum cardiomyopathy
Halkein, Julie ULg; Tabruyn, Sébastien ULg; Haghikia, Arash et al

Poster (2012, January)

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See detailLE CONSEIL D'ETAT DE BELGIQUE
Thibaut, Eric ULg; Jaumotte, Jacques; Salmon, Jacques

Book published by Bruylant (2012)

Cet ouvrage, par son approche tant pratique que méthodique, guide le lecteur à travers les législations applicables, les procédures, les méthodes et la jurisprudence du Conseil d’État, tant de sa section ... [more ▼]

Cet ouvrage, par son approche tant pratique que méthodique, guide le lecteur à travers les législations applicables, les procédures, les méthodes et la jurisprudence du Conseil d’État, tant de sa section de législation que de sa section du contentieux administratif. Il se caractérise notamment par une description complète, légisprudence et/ou jurisprudence à l’appui, de l’ensemble des procédures applicables. Cet ouvrage s’inscrit dans le cadre d’une généralisation de plus en plus accentuée de juridictions administratives spécialisées, tant aux niveaus fédéral que régionaux et communautaires, pour lesquelles les principes et procédures applicables sont le plus souvent inspirés de ceux applicables devant le Conseil d’État. Il s’efforce par ailleurs de faire le point sur la jurisprudence pertinente en la matière, tout en prenant en considération le plus souvent possible la jurisprudence tant des chambres de langue néerlandaise que des chambres de langue française de la section du contentieux administratif du Conseil d’État. Il comporte également d’importants développements par rapport à la procédure de cassation administrative, laquelle prend une importance sans cesse croissante depuis la réforme opérée par la loi du 15 septembre 2006 et l’introduction d’une procédure de « filtrage » des pourvois en cassation. [less ▲]

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See detailCombining Territorial Data With Thermal Simulations to Improve Energy Management of Suburban Areas
Marique, Anne-Françoise ULg; Petel, Maud; Hamdi, Asma et al

in Proceedings of GEOProcessing 2012 (2012, January)

Urban sprawl has been identified as a major issue for sustainable development. Energy consumption in suburban buildings, in particular, is a widespread issue because detached types of houses require ... [more ▼]

Urban sprawl has been identified as a major issue for sustainable development. Energy consumption in suburban buildings, in particular, is a widespread issue because detached types of houses require significantly more energy to be heated than more compact urban forms. Energy efficiency is often presented as a viable approach to the mitigation of climate change, but research and studies mainly contend with individual buildings and do not address this issue at larger territorial scales or for a whole building stock. In this respect, this paper first presents a morphological definition of urban sprawl. This definition uses territorial and cadastral data available for the Walloon region of Belgium. Using this definition, a suburban type classification adapted to thermal studies is drawn up. A representative block of each type is selected to model energy use and to determine the total energy consumption of the whole suburban building stock. An application is then presented concerning a comparison of potential energy savings associated with several renovation strategies. The results of this exercise are presented and highlight the benefits of combining Geographic Information Systems (GIS) tools, territorial data and thermal simulations for the efficient energy management of suburban areas at the scale of the whole building stock. [less ▲]

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See detailAnthracology: past disturbances and vegetation evolution
Morin-Rivat, Julie ULg

in CoForChange - Newsletter (2012)

One of CoForChange aims is to highlight the relationship between human settlement and plant distribution. Recent studies show that anthropogenic disturbances have had an impact on vegetation, including ... [more ▼]

One of CoForChange aims is to highlight the relationship between human settlement and plant distribution. Recent studies show that anthropogenic disturbances have had an impact on vegetation, including enabling the expansion of light-demanding species (see Newsl. No 4). To contribute to this analysis in a context of deep scarcity of anthracological data in Africa, we have been studying the charcoals from nine soil pits of the CoForChange project as part of a Master’s. The objective was to understand past and present species composition of the forests in relation with past disturbances. Two anthracological protocols of identification were tested: 1) at species level, by describing the anatomical characteristics of charcoals, by carrying investigations with InsideWood online database, and by comparing anatomical data at XylariumTervuren; 2) at community level, by searching for statistical relationships between ecological traits of species and wood anatomy. The results show that the taxonomic diversity is greater in Marantaceae forests than in lowland forests. Three identifications were obtained from 48 described taxa: Gilbertiodendron dewevrei under G. dewevrei monodominant forest (GIB1 at 40 cm depth, 1510 ± 30 years cal. BP), Millettia drastica and Pterocarpus soyauxii inMarantaceae open forests (F9 at 40 cm, 1200 ± 30 cal. BP). Our hypothesis is that monodominant stands of G. dewevrei are relatively stable. With regard to P. soyauxii, the proportion of this lightdemanding species seems to be decreasing over time (at levels from 20 to 40 cm) for the benefit of Marantaceae. Another result highlights the absence of Triplochiton scleroxylon under T. scleroxylon, which may confirm the hypothesis of the recent settlement of this species. Results on the relationship between wood anatomy and functional traits are still preliminary, and further research will be conducted through a PhD programme. The on-going developments of anthracology in tropical Africa will help to identify a larger number of collected samples, and thus to understand better the evolution of tropical forests. [less ▲]

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See detailStudy of 2-Ethanolamine degradation
Léonard, Grégoire ULg; Toye, Dominique ULg; Heyen, Georges ULg

Conference (2012, January)

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 ... [more ▼]

One major drawback of the post-combustion CO2 capture using conventional amine solvents is solvent degradation, which can be due to thermal as well as oxidative mechanisms. Degradation affects the CO2 capture process since it may cause corrosion, foaming and fouling, possibly inducing a decrease of the solvent efficiency and high additional operating costs due to solvent replacement. In order to study degradation of conventional amine solvents as well as degradation of novel solvents, a degradation test rig has been built at the University of Liège in collaboration with the company Laborelec, member of the GDF SUEZ group. Since degradation generally occurs within a few months in real plant conditions, this equipment has been designed to allow the study of different degradation mechanisms under accelerated conditions, at high temperatures (up to 140°C) and high partial pressures in oxygen and CO2 (total pressure up to 20 bar with varying gas composition). An advantage of this degradation test rig is that it can be used in batch as well as in semi-batch mode with constant gas flow. High gas-liquid contact efficiency is also ensured thanks to a mechanical agitation system combined with gas bubbling. For a typical run, 300g of aqueous amine solution (30 wt % MEA in water) is introduced into the reactor and degraded during two weeks. The degraded solutions are then analysed using high pressure liquid chromatography (HPLC) for MEA quantification and gas chromatography with flame ionization detector (GC-FID) for the characterization of degradation products. The gas phase is analysed by Fourier Transform Infra Red spectroscopy. The final objective of this work is to implement the data obtained from experimental results on the degradation test rig into an existing simulation model that has been developed based on an existing pilot plant. [less ▲]

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See detailContagion inside the Credit Default Swaps markets in the light of 2008 crisis
Sougné, Danielle ULg; Mattar, Jamal ULg

in Journal of Business and Economics (2012)

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See detailLife in the cold: proteomics of the Antarctic bacterium Pseudoalteromonas haloplanktis
Piette, Florence ULg; Struvay, Caroline ULg; Godin, Amandine ULg et al

in Heazlewood, J. L.; Petzold, C. J. (Eds.) Proteomic Applications in Biology (2012)

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See detail(G)astronomie - Comète glacée
Nazé, Yaël ULg

Article for general public (2012)

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See detailla méthode conductive selon Petho
Battisti, Oreste ULg

Learning material (2012)

introduction et illustration par un film de la méthode conductive selon Petho, avec le film "je veux le faire tout seul"

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See detailIntense physical exercise related to the emergent generation of cardiovascular risk markers: review
LE GOFF, Caroline ULg; LAURENT, Terry ULg; Kaux, Jean-François ULg et al

in Biology of Sport (2012), 29(1), 11-16

Objective: The present review was performed in order to bring together the current knowledge about the impact of intense physical exercise on cardiovascular function, especially on plasma levels of ... [more ▼]

Objective: The present review was performed in order to bring together the current knowledge about the impact of intense physical exercise on cardiovascular function, especially on plasma levels of cardiovascular risk markers such as cardiac troponin T (cTnT), myeloperoxidase (MPO), amino-terminal pro-brain natriuretic peptide (NT-proBNP), C-reactive protein (CRP) and oxidized low-density lipoprotein (oxLDL). Methods: Data were collected using the PubMed database. The articles were chosen for their relevance and importance in the area of interest. Results: The literature describes numerous examples where physical exercise induces plasma variation for the markers studied. Intense physical effort increases the levels of cTnT, MPO and NTproBNP, whereas CRP and oxLDL levels tend to be decreased with regular sport activities. Conclusions: The present literature investigation confirms the fact that intense physical exercise has an impact on the plasma variations of the five cardiovascular risk markers studied. However, practising regular exercise remains one of the first strategies for the prevention of cardiovascular disorders. [less ▲]

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See detailÉtienne Klein, "Le Small Bang des nanotechnologies"
Thoreau, François ULg

in Esprit (Paris, France : 1932) (2012), 381

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