References of "2012"
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See detailInternet-Based Investing at the Edge of Chaos
Choffray, Jean-Marie ULg

E-print/Working paper (2012)

This paper presents a simple, seven-step approach, to surviving on World Street: an investment environment characterized by high frequency trading system; over leveraged shadow entities and hedge funds ... [more ▼]

This paper presents a simple, seven-step approach, to surviving on World Street: an investment environment characterized by high frequency trading system; over leveraged shadow entities and hedge funds; flash crashes, incompetent management, reverse merger frauds, dot bubble 2.0 IPOs and stealth central banks’ actions. Its goal is to help you design efficient investment strategies while protecting your assets. It is based on a personal research conducted over the last ten years, involving hundreds of observations, investment simulations and actual decisions. [less ▲]

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See detailProposition de redéfinition pragmatique des bâtiments net-zéro énergie
Moeseke, Goffrey; Attia, Shady ULg; Massart, Catherine et al

in Symposium PassiveHouse 2012 (2012, January)

La notion de NZEB, en tant qu’indicateur de performance, doit répondre à un triple objectif de rigueur scientifique, d'ambition proportionnelle à l'enjeu et de pragmatisme. Nous montrons que la définition ... [more ▼]

La notion de NZEB, en tant qu’indicateur de performance, doit répondre à un triple objectif de rigueur scientifique, d'ambition proportionnelle à l'enjeu et de pragmatisme. Nous montrons que la définition actuelle des NZEB ne répond pas de façon optimale à ces 3 exigences. Dès lors, nous proposons une autre approche de la performance énergétique des bâtiments, centrée sur la dissociation des indicateurs et leur évaluation relative aux potentiels et contraintes du projet d’architecture. Plus qu’une redéfinition, le résultat de cet article est l’embryon d’un outil de guidance énergétique parallèle aux étapes de développement d'un projet. [less ▲]

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See detailSerial FEM/XFEM-Based Update of Preoperative Brain Images Using Intraoperative MRI
Vigneron, Lara; Noels, Ludovic ULg; Warfield, Simon et al

in International Journal of Biomedical Imaging (2012), 2012

Current neuronavigation systems cannot adapt to changing intraoperative conditions over time. To overcome this limitation, we present an experimental end-to-end system capable of updating 3D preoperative ... [more ▼]

Current neuronavigation systems cannot adapt to changing intraoperative conditions over time. To overcome this limitation, we present an experimental end-to-end system capable of updating 3D preoperative images in the presence of brain shift and successive resections. The heart of our system is a nonrigid registration technique using a biomechanical model, driven by the deformations of key surfaces tracked in successive intraoperative images. The biomechanical model is deformed using FEM or XFEM, depending on the type of deformation under consideration, namely brain shift or resection. We describe the operation of our system on two patient cases, each comprising ¯ve intraoperative MR images, and demonstrate that our approach significantly improves the alignment of nonrigidly registered images. [less ▲]

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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 detailGestion de la diversité: nouveaux enjeux
Cornet, Annie ULg

Conference (2012, January)

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See detailModèles chaotiques en économie
Bair, Jacques ULg; Haesbroeck, Gentiane ULg

in Tangente Sup (2012), 63 - 64

Dans cet ouvrage consacré au thème des prévisions, nous montrons que certains modèles mathématiques ,reposant sur des équations récurrentes non linéaires, permettent de décrire des phénomènes qui ... [more ▼]

Dans cet ouvrage consacré au thème des prévisions, nous montrons que certains modèles mathématiques ,reposant sur des équations récurrentes non linéaires, permettent de décrire des phénomènes qui paraissent aléatoires, alors qu'ils sont purement déterministes. Une application à l'économie illustre les propos. [less ▲]

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See detailThe CphAII protein from Aquifex aeolicus exhibits a metal-dependent phosphodiesterase activity
Kupper, Michaël; Bauvois, Cédric; Frère, Jean-Marie ULg et al

in Extremophiles : Life Under Extreme Conditions (2012), 16(1)

The CphAII protein from the hyperthermophile Aquifex aeolicus shows the five conserved motifs of the metallo-β-lactamase (MBL) superfamily and presents 28% identity with the Aeromonas hydrophila subclass ... [more ▼]

The CphAII protein from the hyperthermophile Aquifex aeolicus shows the five conserved motifs of the metallo-β-lactamase (MBL) superfamily and presents 28% identity with the Aeromonas hydrophila subclass B2 CphA MBL. The gene encoding CphAII was amplified by PCR from the A. aeolicus genomic DNA and overexpressed in Escherichia coli using a pLex-based expression system. The recombinant CphAII protein was purified by a combination of heating (to denature E. coli proteins) and two steps of immobilized metal affinity chromatography. The purified enzyme preparation did not exhibit a β-lactamase activity but showed a metal-dependent phosphodiesterase activity versus bis-p-nitrophenyl phosphate and thymidine 5'-monophosphate p-nitrophenyl ester, with an optimum at 85°C. The circular dichroism spectrum was in agreement with the percentage of secondary structures characteristic of the MBL αββα fold. [less ▲]

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See detailLongitudinal field study on bovine Babesia spp. and Anaplasma phagocytophilum infections during a grazing season in Belgium
Lempereur, Laetitia ULg; Lebrun, Maude; Cuvelier, Pascale et al

in Parasitology Research (2012), 110(4), 1525-1530

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See detailMaladies du blé d'hiver au Luxembourg Les interactions entre climat, sol et phytotechnie montrent l'importance primordiale du facteur climat
El Jarroudi, Moussa ULg; Giraud, Frédéric; Delfosse, Philippe et al

in Phytoma : La Défense des Végétaux (2012), 650

Malgré sa petite taille, le GDL est caractérisé par deux régions très contrastées en ce qui concerne les maladies cryptogamiques du blé d’hiver. Une analyse en composante principale a permis d’analyser la ... [more ▼]

Malgré sa petite taille, le GDL est caractérisé par deux régions très contrastées en ce qui concerne les maladies cryptogamiques du blé d’hiver. Une analyse en composante principale a permis d’analyser la distribution des maladies cryptogamiques entre le Gutland et l’Oseling. La distribution des maladies cryptogamiques est significativement différente (P < 0.001) entre le Gutland et l’Oesling. Entre 2003 et 2009, la septoriose et la rouille brune sont des maladies qui caractérisent le Gutland avec respectivement comme pourcentage 51 et 17%. Dans l’Oesling, la sévérité de ces maladies était très faible et n’atteignait même pas 1%. A l’opposé, l’Oesling est caractérisée par l’installation de l’Oïdium surtout en 2003 et 2009 avec respectivement 15 et 40% de sévérité alors cette maladie ne dépassait pas 1% de sévérité en Gutland. Parallèlement à ces maladies, d’autres pathogènes fongiques sont observées uniquement en Gutland et les maladies qu’ils causent sont influencées par la phytotechnie. Il s’agit de l’helminthosporiose et de la rouille jaune avec comme caractéristique le contournement du gène de résistance Yr 17+. La variation dans l’expression des maladies cryptogamiques entre le Gutland et l’Oesling est surtout due aux différences marquées des conditions climatiques entre les deux régions mais aussi aux pratiques agricoles en vigueur (fumure azotée, choix variétal, semis avec labour ou sans labour….). [less ▲]

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See detailLa nécessité d'un inventaire du patrimoine culturel immatériel
Lempereur, Françoise ULg

in Géants d'ici et d'ailleurs (2012, January), (6-7), 24-30

Destinée essentiellement aux institutions et groupements qui ont en charge la sauvegarde du patrimoine culturel immatériel, cette présentation rapide justifie l'inventorisation de ce patrimoine, en ... [more ▼]

Destinée essentiellement aux institutions et groupements qui ont en charge la sauvegarde du patrimoine culturel immatériel, cette présentation rapide justifie l'inventorisation de ce patrimoine, en définit les responsabilités et propose une méthodologie de collectage et de mise à disposition publique des contenus [less ▲]

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See detailLife-cycle assessment of residential buildings in three different European locations, case study
Rossi, Barbara ULg; Marique, Anne-Françoise ULg; Reiter, Sigrid ULg

in Building & Environment (2012), 51

The paper presents the comparative results of the life-cycle assessment (LCA) of one residential building with two constructive systems in Brussels and one steel frame house located in three different ... [more ▼]

The paper presents the comparative results of the life-cycle assessment (LCA) of one residential building with two constructive systems in Brussels and one steel frame house located in three different European towns: Brussels (Belgium), Coimbra (Portugal) and Luleå (Sweden). In a recent study, a modular building was studied in Coimbra and Luleå. It was shown that in terms of CO2 emissions, the Use Stage was the most harmful stage during the building life-cycle for Coimbra climate. Contrarily, in Luleå, it was the Product Stage, despite energy consumption being higher than Coimbra, due to the way electricity and heat are generated. In the present study, two structural systems are first compared for the Belgian house: steel frame and traditional masonry. A different life-cycle scenario is taken into account for the steel frame house for the three different locations, in which the monthly temperatures, energy mix, heating and cooling systems are defined. The LCA is carried out using the basic tool described in the companion paper. It is worth recalling that the results obtained with the basic tool were verified against Pleiades+Comfie and Equer software, enabling to carry out a complete LCA, for Brussels. Our results confirm that for all the three climates, the Use Stage (Operational energy) is the most harmful period during the building life-cycle and that the energy mix of the country strongly influences the equivalent CO2 emissions related to the Use Stage (Operational carbon) and may entirely reverse the conclusions about the life-cycle carbon footprint of the building. [less ▲]

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See detailThe limits of the economic value in measuring the global performance of social innovation
Mertens de Wilmars, Sybille ULg; Marée, Michel ULg

in Nicholls Alex; Murdock Alex (Eds.) Social innovation : Blurring boundaries to reconfigure markets (2012)

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See detailAnthracologie : perturbations passées et évolution de la végétation
Morin-Rivat, Julie ULg

in CoForChange - La Lettre (2012)

Mettre en évidence la relation entre occupation humaine et distribution de la végétation est l’un des points abordés par CoForChange. Les récentes études montrent que les perturbations anthropiques ont eu ... [more ▼]

Mettre en évidence la relation entre occupation humaine et distribution de la végétation est l’un des points abordés par CoForChange. Les récentes études montrent que les perturbations anthropiques ont eu une influence sur la végétation, permettant notamment l’expansion des espèces héliophiles (cf. Lettre n° 4). Pour contribuer à cette analyse dans un contexte de grande rareté des données anthracologiques en Afrique, nous avons, dans le cadre d’un master, choisi d’étudier les charbons de bois issus de neuf fosses pédologiques du projet CoForChange. L’objectif était d’appréhender les compositions floristiques actuelle et passée des forêts au regard des perturbations passées. Deux protocoles anthracologiques d’identification ont été testés : a) à l’échelle de l’espèce, par une description des caractères anatomiques des charbons de bois, une recherche sur la base de données en ligne InsideWood et une comparaison anatomique au Xylarium de Tervuren ; b) à l’échelle de la communauté, par une recherche des relations statistiques entre traits écologiques des espèces et anatomie du bois. Les résultats montrent que la diversité taxonomique sous les forêts à Marantaceae est plus grande que sous les forêts denses de terre ferme. Trois identifications ont été obtenues sur 48 taxons décrits : Gilbertiodendron dewevrei sous forêt monodominante à G. dewevrei (GIB1 à 40 cm de profondeur, 1 510 ± 30 années cal. BP (calibrated before present), Millettia drastica et Pterocarpus soyauxii sous forêt clairsemée à Marantaceae (F9 à 40 cm, 1 200 ± 30 cal. BP). Notre hypothèse est que les peuplements monodominants à G. dewevrei sont relativement stables. Quant à P. soyauxii, la proportion de cette espèce héliophile semble décroître au cours du temps (niveaux entre 20 et 40 cm) au profit desMarantaceae. Un autre résultat porte sur l’absence de Triplochiton scleroxylon sous T. scleroxylon, ce qui pourrait confirmer l’hypothèse du caractère récent de ces peuplements. Les résultats portant sur la relation entre anatomie du bois et traits fonctionnels restant préliminaires, cette recherche sera poursuivie en thèse de doctorat. Les développements actuels de l’anthracologie pour l’Afrique tropicale permettent désormais d’envisager un plus grand nombre d’identifications par échantillon et ainsi une meilleure connaissance de l’évolution des forêts tropicales. [less ▲]

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See detailTransfer of drug dissolution testing by statistical approaches: Case Study
AL-Kamarany, M. A.; EL Karbane, M.; Ridouan, K. et al

in Saudi Pharmaceutical Journal (2012), 20(1), 93101

The analytical transfer is a complete process that consists in transferring an analytical procedure from a sending laboratory to a receiving laboratory. After having experimentally demonstrated that also ... [more ▼]

The analytical transfer is a complete process that consists in transferring an analytical procedure from a sending laboratory to a receiving laboratory. After having experimentally demonstrated that also masters the procedure in order to avoid problems in the future. Method of transfers is now commonplace during the life cycle of analytical method in the pharmaceutical industry. No official guideline exists for a transfer methodology in pharmaceutical analysis and the regulatory word of transfer is more ambiguous than for validation. Therefore, in this study, Gauge repeatability and reproducibility (R&R) studies associated with other multivariate statistics appropriates were successfully applied for the transfer of the dissolution test of diclofenac sodium as a case study from a sending laboratory A (accredited laboratory) to a receiving laboratory B. The HPLC method for the determination of the percent release of diclofenac sodium in solid pharmaceutical forms (one is the discovered product and another generic) was validated using accuracy profile (total error) in the sender laboratory A. The results showed that the receiver laboratory B masters the test dissolution process, using the sameHPLC analytical procedure developed in laboratory A. In conclusion, if the sender used the total error to validate its analytical method, dissolution test can be successfully transferred without mastering the analytical method validation by receiving laboratory B and the pharmaceutical analysis method state should be maintained to ensure the same reliable results in the receiving laboratory. [less ▲]

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See detailConseils pour écrire et évaluer un article scientifique
Cornet, Annie ULg

Diverse speeche and writing (2012)

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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 detailUnsteady Navier-Stokes simulation of low-Reynolds stall flutter
Yabili, Sacha ULg; Smith, Marilyn; Dimitriadis, Grigorios ULg

in Proceedings of the 50th AIAA Aerospace Sciences Meeting (2012, January)

A solver has been developed within the OpenFoam framework to compute large amplitude motion of two-dimensional rigid configurations. The results obtained with this code were successfully validated on ... [more ▼]

A solver has been developed within the OpenFoam framework to compute large amplitude motion of two-dimensional rigid configurations. The results obtained with this code were successfully validated on rigid airfoils at static and dynamic conditions, as well as correlated with experimental data and numerical solutions from similar unsteady solvers. The results demonstrate that current computational methods are, within the constraints imposed by spatial grids, temporal integration and turbulence modeling, capable of capturing the self-sustained oscillations characterizing stall flutter event with reasonable accuracy, including the mechanisms of energy transfer. [less ▲]

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See detailAnalgésie péridurale obstétricale et lombalgie du post-partum: un lien de cause à effet?
CHARLIER, Vanessa ULg; Brichant, Géraldine ULg; DEWANDRE, Pierre-Yves ULg et al

in Revue Médicale de Liège (2012), 67(1), 16-20

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be ... [more ▼]

backache is a common problem in the general population. the prevalence of backpain is increased during pregnancy and after delivery. early studies have suggested that labor epidural analgesia might be associated with an increased incidence of backache in the postpartum period. However, these initial studies were retrospective and their design included several methodological deficiencies. All the prospective studies published afterwards (prospective cohort studies and 3 ran- domized controlled trials) yield the same result : there is no relationship between labor epidural analgesia and long-term postpartum backpain. pregnant women must be aware of this in order to make an informed and appropriate choice about labor epidural analgesia, the most effective technique for intra- partum pain relief. [less ▲]

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