References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
See detailOceanic CO2 sink: the contribution of the marine cryosphere
Delille, Bruno ULiege; Vancoppenolle, M.; Tilbrook, B. et al

Conference (2010)

Detailed reference viewed: 11 (0 ULiège)
Full Text
Peer Reviewed
See detailFemale fertility expression in Walloon dairy cattle
Vanderick, Sylvie ULiege; Bastin, Catherine ULiege; Gengler, Nicolas ULiege

in Proceedings of the 9th World Congress on Genetics Applied to Livestock Production, Leipzig, Germany, 1-6 August, 2010 (2010)

A useful method to express female fertility of the Walloon dairy cattle using direct and indirect female fertility information was considered. Data were based on results of the genetic evaluation of ... [more ▼]

A useful method to express female fertility of the Walloon dairy cattle using direct and indirect female fertility information was considered. Data were based on results of the genetic evaluation of pregnancy rate for 606,328 Holstein cows and on INTERBULL proofs of female fertility for 88,496 bulls. A direct female fertility index (DFF), using INTERBULL proofs, was developed from results of a principal component analysis carried out on 6 published foreign female fertility indexes. An indirect female fertility index (IFF) was also developed from ten other traits evaluated in Walloon Region. Theory of selection index was used to combine DFF and IFF in a global index called combined female fertility index (CFF). This index allowed young bulls to have better reliabilities with an average increase of 12% leading to extra 4,019 of publishable bulls for female fertility. [less ▲]

Detailed reference viewed: 35 (9 ULiège)
Full Text
Peer Reviewed
See detailValidation of a new French-language triage algorithm : the ELISA scale.
Jobe, Jérôme ULiege; Ghuysen, Alexandre ULiege; GERARD, P. et al

in Critical Care (2010), 14(Suppl1), 277

Detailed reference viewed: 45 (15 ULiège)
Full Text
Peer Reviewed
See detailLogiciel NotaBene pour l’annotation linguistique. Annotations et conceptualisations multiples
Mazziotta, Nicolas ULiege

in Recherches qualitatives. Hors-série "Les actes" (2010), 9

Nous voudrions présenter ici le logiciel libre NotaBene. Il s'agit d'un logiciel destiné principalement à l'annotation linguistique de ressources textuelles écrites en ancien français, mais dont les ... [more ▼]

Nous voudrions présenter ici le logiciel libre NotaBene. Il s'agit d'un logiciel destiné principalement à l'annotation linguistique de ressources textuelles écrites en ancien français, mais dont les principes se veulent suffisamment génériques pour servir à l'exploitation d'autres types de ressources et éventuellement dans d'autres disciplines. NotaBene est basé sur des standards (XML, RDF et OWL) et permet l'affichage simultané d'analyses de nature différentes (p. ex.: lemmatisations vs arbres syntaxiques ou de progression thématique) ou simplement concurrentes (effectuées par deux chercheurs différents). Le logiciel permet également à chaque utilisateur de définir son propre modèle d'annotation et son jeu d'étiquettes personnalisé. Le modèle est enregistré de manière formalisée pour permettre les échanges et les traitements automatiques. [less ▲]

Detailed reference viewed: 139 (17 ULiège)
Full Text
Peer Reviewed
See detailWykorzystanie impact-echo i radaru do wykrywania defektow ukladu naprawczego nie zawierajacych warstwy powietrza
Garbacz, Andrzej; Harassek, Piotr; Van der Wielen, Audrey ULiege et al

in 39th Polish Conference on Non destructive Testing Methods, Szczyrk 26-28 October, Zeszyty Problemowe. Badania nieniszczące (2010)

Detailed reference viewed: 24 (1 ULiège)
See detailEvaluation de la distribution d’abondance des plantes vasculaires au Parc National de la Ruvubu, Burundi.
Masharabu, T; Noret, N; Lejoly, J et al

in XIXth AETFAT Congress- Madagascar, 25-30 april, 2010. (2010)

Detailed reference viewed: 22 (2 ULiège)
Full Text
See detailCombined experimental and computational approaches to study the action of blockers of small conductance calcium-activated potassium (SK) channels
Dilly, Sébastien ULiege; Lamy, Cédric; Liégeois, Jean-François ULiege et al

in Acta Physiologica Scandinavica (2010), 199(supplement 678), -10

Small conductance calcium-activated potassium channels (SK) are widely expressed throughout the central nervous system (CNS) and underlie medium duration afterhyperpolarizations in many types of neurons ... [more ▼]

Small conductance calcium-activated potassium channels (SK) are widely expressed throughout the central nervous system (CNS) and underlie medium duration afterhyperpolarizations in many types of neurons. Three subtypes of SK channels, SK1, SK2 and SK3, have been identified so far in different parts of the brain. Blocking SK channels might be beneficial in the treatment of several CNS disorders such as depression, Parkinson’s disease and cognitive disorders. Until now, the precise site of interaction between these channels and their blockers has not yet been elucidated. In this context, molecular modeling is a theoretical approach that can quickly provide ideas on the binding mode of SK blockers. We first performed homology modeling of the S5-H5-S6 portion of the channels on the basis of the crystal structure of the KcsA potassium channel (Zhou et al. Nature. 2001, 414, 43-48). The binding sites of N-methyl-laudanosine (NML) (Scuvée-Moreau et al. J. Pharmacol. Exp. Ther. 2002, 302, 1176-83), a non-selective and non-peptidic ligand, and apamin (Blatz et al. Nature. 1986, 323, 718-20), an octadecapeptide with a preference for the SK2 subtype, were subsequently explored by docking analysis. Different amino-acids were suggested to interact with the two blockers. The docking of NML revealed a binding site in the turret region, far from the pore. The docking of apamin identified a very large binding site that includes a portion of the site of NML. In order to confirm the predicted binding sites, site-directed mutagenesis was used. The first mutant channels tested in electrophysiological experiments by the patch clamp technique validated some of the theoretical data. Using this strategy, we hope to get a better understanding of the mechanism of action of SK blockers and eventually find strategies to obtain subtype-selective blockers. [less ▲]

Detailed reference viewed: 77 (3 ULiège)
See detailMassive stars, a lifetime of influence
Nazé, Yaël ULiege

Poster (2010)

Detailed reference viewed: 21 (4 ULiège)
Full Text
See detailVapor phase doping for ultra shallow junction formation in advanced Si CMOS devices
Shimizu, Yasuo; Nguyen, Ngoc Duy ULiege; Jiang, Sijia et al

Poster (2010)

Detailed reference viewed: 42 (1 ULiège)
Peer Reviewed
See detailDiscussion : Pratiques évaluatives en classe et épreuves externes
Lafontaine, Dominique ULiege

in Congrès international. Actualité de al recherche en éducation et en formation. AREF 2010 (2010)

Detailed reference viewed: 25 (2 ULiège)
Full Text
Peer Reviewed
See detailSleep spindles and neural activity changes in the cortico-striatal system underlie motor sequence consolidation
Barakat, M; Carrier, J; Debas, K et al

in NeuroImage (2010), 51(Suppl. 1),

Detailed reference viewed: 20 (1 ULiège)
See detailGene expression of the lipoxygenase pathway in a tomato species tolerant to salt stress
Ghars, Mohamed Ali ULiege; Muhovski, Y.; Ghanem, M. et al

Poster (2010)

Detailed reference viewed: 54 (1 ULiège)
Full Text
See detailComparison of the amnesic, ataxic and hypothermic effects of ethanol and acetaldehyde in mice
Closon, Catherine ULiege; Quertemont, Etienne ULiege

in Alcoholism, Clinical & Experimental Research (2010), 34(8), 92-92

Acetaldehyde, the first metabolite of ethanol, has been suggested to be involved in many behavioral effects of ethanol. However, very few studies have been published on the role of acetaldehyde in the ... [more ▼]

Acetaldehyde, the first metabolite of ethanol, has been suggested to be involved in many behavioral effects of ethanol. However, very few studies have been published on the role of acetaldehyde in the amnesic and ataxic effects of ethanol. The aim of the present studies was to compare the profiles of ethanol and acetaldehyde in several behavioral tests, measuring motor coordination, learning and memory in mice. Female Swiss mice were injected intraperitoneally with ethanol (0-3g/kg) and acetaldehyde (100-300mg/kg). The effects of these substances on a series of representative behaviors were investigated. The amnesic effects were tested with an object recognition task and a one-trial passive avoidance test. Additionally, the rectal temperatures were used to evaluate the hypothermic effects of the two substances. Finally, motor coordination was assessed using the accelerating rotarod test. The results showed that acetaldehyde, like ethanol, altered memory as shown by a reduced performance in the passive avoidance test and the object recognition task. In addition, acetaldehyde at doses between 100 and 300 mg/kg induced significant hypothermic effects, but that was of shorter duration than ethanol-induced hypothermia. Finally, significant ataxic effects of both acetaldehyde and ethanol were observed in the accelerating rotarod test. Overall, the results of the present study clearly show that acetaldehyde, like ethanol, has amnesic, hypothermic and ataxic properties in mice at least at relatively high concentrations. [less ▲]

Detailed reference viewed: 62 (12 ULiège)
See detailFunctional interplay between macroH2A and Polycomb Repressive Complexes
Creppe, Catherine ULiege; Valero, Vanesa; Di Croce, Luciano et al

Poster (2010)

Detailed reference viewed: 7 (5 ULiège)
Full Text
See detailCenozoic and Devonian carbonate mound systems – comparisons of magnetic susceptibility behaviour between recent and ancient systems.
Da Silva, Anne-Christine ULiege; Foubert, Anneleen; De Mol, Ben

in Travaux Géophysiques (2010), XXXIX

Detailed reference viewed: 19 (2 ULiège)
See detailUsing information on urban morphology derived from a time-series of medium resolution remote sensing data for the calibration of the moland urban growth model
van der Kwast; Van de Voorde, Tim; Binard, Marc ULiege et al

in Joint SIG Workshop Urban - 3D - Radar - Thermal Remote Sensing and Developing Countries, Book of Proceedings EUROPEAN ASSOCIATION OF REMOTE SENSING LABORATORIES (2010)

Land-use change models are more and more used by planners and policy makers as tools to assess the impacts of their decisions on the spatial systems that they are to manage. To be usefully applicable the ... [more ▼]

Land-use change models are more and more used by planners and policy makers as tools to assess the impacts of their decisions on the spatial systems that they are to manage. To be usefully applicable the models need extensive calibration. Typically the required time series of land-use maps based on identical and consistent mapping methodologies, legends and scales are missing. As a result, the land-use changes measured in the time intervals studied are often the result of mismatches in the mapping procedures rather than real changes in the land-use patterns of interest. As an alternative, land-use products inferred from archived medium resolution remote sensing images have a large potential for usage in the historic calibration of land-use change models. However, inferring land-use classes from remote sensing data is not straightforward. Therefore, a calibration framework for land-use change modelling is being developed which is based on the comparison of spatial metrics derived from both remote sensing images and simulation results. Parameters used in the simulation model are tuned in such a way that the simulated patterns of urban growth, as described by the metrics, match the patterns observed in the remote sensing imagery. This study evaluates the applicability of spatial metrics calculated from urban masks derived from remote sensing images and simulated land-use maps for the historic calibration of the EU-MOLAND model of Dublin. Results show that the historic calibration can be improved by using remote sensing derived spatial metrics. [less ▲]

Detailed reference viewed: 49 (6 ULiège)
Full Text
See detailCyclostratigraphic implications of Devonian-climate astronomical forcing.
De Vleeschouwer, David; Da Silva, Anne-Christine ULiege; Boulvain, Frédéric ULiege et al

in Geological Society of America Abstracts with Programs (2010), 42(5), 540

Detailed reference viewed: 17 (1 ULiège)
Full Text
Peer Reviewed
See detailNondestructive Detection of Delaminations in Concrete Bridge Decks: A First Experimental Study
Van der Wielen, Audrey ULiege; Courard, Luc ULiege; Nguyen, Frédéric ULiege

in Proceedings of the XIII International Conference on Ground Penetrating Radar (2010)

To detect delaminations in concrete bridge decks, nondestructive techniques (NDT) permit a frequent and large inspection of the slabs without damaging structures. This research was devoted to detect ... [more ▼]

To detect delaminations in concrete bridge decks, nondestructive techniques (NDT) permit a frequent and large inspection of the slabs without damaging structures. This research was devoted to detect simulated defects in twelve repaired concrete slabs. These were scanned with high frequency ground penetrating radar (GPR) with the common offset (CO) and common midpoint (CMP) methods. The electromagnetic waves speed was determined from CMPs. A 3D visualization program was also created to display the CO measurements. The visibility of the inserted defects revealed to be dependent on their lateral extension, their thickness and their constitutive material. [less ▲]

Detailed reference viewed: 470 (13 ULiège)
Peer Reviewed
See detailInfluence of operating conditions on the gaseous emissions related to urban residual sludge convective drying
Fraikin, Laurent ULiege; Herbreteau, Benjamin; Chaucherie, Xavier et al

Poster (2010)

Detailed reference viewed: 33 (8 ULiège)
Full Text
See detailStromatoporoids paleoecology from the Frasnian (Upper Devonian) of Southern Belgium.
Da Silva, Anne-Christine ULiege; Kershaw, Stephen; Boulvain, Frédéric ULiege

in International Palaeontological Congress, Programme and Abstracts (2010)

Detailed reference viewed: 18 (1 ULiège)
See detailUltraviolet aurorae and dayglow in the upper atmospheres of terrestrial planets
Gérard, Jean-Claude ULiege; Hubert, Benoît ULiege; Gustin, Jacques ULiege et al

in 38th COSPAR Scientific Assembly (2010)

Since its discovery in 2005 with the SPICAM spectrograph on board Mars Express, the Mars aurora has been further investigated. It is caused by sporadic soft electron precipitation whose signature is ... [more ▼]

Since its discovery in 2005 with the SPICAM spectrograph on board Mars Express, the Mars aurora has been further investigated. It is caused by sporadic soft electron precipitation whose signature is clearly observed in the FUV nightglow spectrum. The characteristics of the auroral electrons have been documented with parallel observations. Dayglow UV spectra have been collected with SPICAM over several seasons. The dependence of the intensity and peak altitude of the CO Cameron bands and CO2 + doublet emissions on latitude, local time and solar activity level have been investigated and compared with the results of a FUV Mars dayglow model. Far and Extreme ultraviolet spectra have been collected with the UVIS instrument during the flyby of Venus by Cassini, in a period a high solar activity. Their analysis shows the presence of OI, OII, NI, CI, CO and CO2 + emissions, some of them not previously identified in the Venus spectrum. The intensities will be compared with those observed with the HUT spectrograph during a period of low solar activity. The excitation processes of the observed features will be discussed. Scans of the intensity variation of several EUV bright emissions such as OII 83.4 nm, OI 98.9 nm and NI 120.0 nm multiplets across the sunlit disc will be compared with the calculations of a Venus dayglow model, including multiple scattering of optically thick transitions. [less ▲]

Detailed reference viewed: 15 (4 ULiège)
Full Text
Peer Reviewed
See detailModeling Microbial Cross-contamination in Quick Service Restaurants by Means of Experimental Simulations With Bacillus Spores
Baptista Rodrigues, Ana Lúcia ULiege; Crevecoeur, Sébastien ULiege; Dure, Remi et al

Poster (2010)

Cross contamination has been frequently mentioned as being in the origin of a wide range of food borne outbreaks. Handling of food is one of the ways through which cross contamination may occur. For many ... [more ▼]

Cross contamination has been frequently mentioned as being in the origin of a wide range of food borne outbreaks. Handling of food is one of the ways through which cross contamination may occur. For many different reasons, quick service restaurants are particularly at risk. Due to its importance, cross contamination via the hands should be taken into consideration when carrying out a quantitative risk assessment. The main goal of this study was to determine transfer rates of bacteria to and via the hands, reduction rates of two hand sanitizing procedures and to apply the results to a quantitative microbial risk assessment model. According to our results, handling of a portion of raw minced meat contaminated at 4.104 cfu leads to the presence of 24 cfu on both hands, 3 cfu on ready-to-eat product (RTE) manipulated with unwashed hands, 1 cfu on RTE manipulated with wiped hands and absence on RTE manipulated with washed hands. This study provides adequate quantitative data for quantitative microbial risk assessment. [less ▲]

Detailed reference viewed: 125 (7 ULiège)
Full Text
See detailMagnetic susceptibility and cyclic arrangements from the late Devonian (Frasnian) Hull platform, Canning Basin, Australia.
Da Silva, Anne-Christine ULiege; George, Annette; Chow, Nancy

in Travaux de Geophysiques (2010), XXXIX

Detailed reference viewed: 15 (2 ULiège)
Peer Reviewed
See detailLa stratégie interrégionale de l’UE et le régionalisme latino-américain à l’heure des mutations géopolitiques
Santander, Sébastian ULiege

in Lebullenger, Joël; Flaesch-Mougin, Catherine (Eds.) Regards croisés sur les intégrations régionales Europe / Amériques en lien avec l’Afrique (2010)

Detailed reference viewed: 13 (0 ULiège)
Full Text
See detailMixed symmetric baryon multiplets in large $N_c$ QCD: two and three flavours
Matagne, Nicolas; Stancu, Floarea ULiege

in Bled Workshops in Physics (2010), 11(1), 37-43

We propose a new method to study mixed symmetric multiplets of baryons in the context of the $1/N_c$ expansion approach. The simplicity of the method allows to better understand the role of various ... [more ▼]

We propose a new method to study mixed symmetric multiplets of baryons in the context of the $1/N_c$ expansion approach. The simplicity of the method allows to better understand the role of various operators acting on spin and flavour degrees of freedom. The method is tested on two and three flavours. It is shown that the spin and flavour operators proportional to the quadratic invariants of SU$_S$(2) and SU$_F$(3) respectively are dominant in the mass formula. [less ▲]

Detailed reference viewed: 19 (5 ULiège)
Full Text
See detailLowest negative parity baryons in the 1/Nc expansion
Matagne, Nicolas; Stancu, Floarea ULiege

in Acta Physica Polonica. B, Proceedings Supplement (2010), 3

We review a recently proposed approach to study the lowest negative parity baryons within the $1/N_c$ expansion. The method is based on the derivation of the matrix elements of SU(2N$_f$) generators for ... [more ▼]

We review a recently proposed approach to study the lowest negative parity baryons within the $1/N_c$ expansion. The method is based on the derivation of the matrix elements of SU(2N$_f$) generators for mixed symmetric $[N_c-1,1]$ flavor-spin states. Presently it is applied to the N = 1 band and a comparison is made with a former method based on the decoupling of the system into a symmetric core of $N_c-1$ quarks and an excited one. We prove that the decoupling is not necessary and moreover, it misses some important physical consequences. [less ▲]

Detailed reference viewed: 19 (7 ULiège)
Full Text
See detailLate Holocene environmental changes recorded in the sediments of Lago Thompson, Northern Chilean Patagonia
Fagel, Nathalie ULiege; Nuttin, L.; Bertrand, S. et al

Poster (2010)

Detailed reference viewed: 19 (2 ULiège)
Full Text
See detailHow large is the Io UV footprint?
Bonfond, Bertrand ULiege; Grodent, Denis ULiege; Gérard, Jean-Claude ULiege et al

Conference (2010)

Located close to the feet of the magnetic field lines connecting Io to each Jovian hemisphere, the Io footprint is the auroral signature of the electromagnetic interaction between Io and Jupiter's ... [more ▼]

Located close to the feet of the magnetic field lines connecting Io to each Jovian hemisphere, the Io footprint is the auroral signature of the electromagnetic interaction between Io and Jupiter's magnetosphere. It consists of several spots followed downstream by an extended tail. The size of the main spot is expected to scale to the size of the interaction region close to Io. Consequently, this quantity is crucial to understand the processes involved. However, the main spot size is a controversial issue as previously published values range from ~400 km to ~10000 km, leading to contradictory conclusions. Based on observations carried on with the Hubble Space Telescope STIS and ACS FUV instruments from 1997 to 2009, we estimate the size of the main footprint spot on a much larger image sample than previously. Additionally, we carefully selected the images in order to avoid viewing geometry ambiguities when measuring the spatial extent of the different features. The main spot length along the footpath is ~900 km while its width perpendicular to the footpath is <200 km. The spot length is larger than the projected diameter of Io along unperturbed magnetic field lines, which appears to be consistent with recent simulations. The vertical extent and the peak altitude of the main spot are similar to those measured in the tail. Nevertheless, the secondary spot attributed to trans-hemispheric electron beams has been measured to peak at ∼200 km below the main spot and the tail, which confirms their different origins. [less ▲]

Detailed reference viewed: 55 (0 ULiège)
Peer Reviewed
See detailConsequences of design choices in direct displacement based design or R.C. frames
Massena, B.; Degée, Hervé ULiege; Bento, R.

in Proceedings of the 14ECEE Conference (2010)

Detailed reference viewed: 34 (1 ULiège)
Peer Reviewed
See detailTowards a Definition for Zero Impact Buildings
Attia, Shady ULiege; De Herde, André

in Sustainable Buildings CIB 2010 (2010)

There have been several attempts to define zero impact or near zero impact buildings. Most of these are based on measuring performance or on metric benchmarks regarding the quantity or quality of the ... [more ▼]

There have been several attempts to define zero impact or near zero impact buildings. Most of these are based on measuring performance or on metric benchmarks regarding the quantity or quality of the various resources employed during a building’s life cycle. However, the problem underlying these efforts is that the resources are measured independent of each other, leading to restrictive overall design approaches. Most existing definitions focus on breaking even with a single resource, such as energy, water or materials, during the building’s life cycle. In fact, the building community needs to set a collective definition for what constitutes a zero ecological impact building, conflating all the resources involved. In this paper, we discuss this deficiency and suggest a shift in thinking necessary to define zero impact buildings. The resulting definition allows us to examine broader criteria including land management, carbon neutrality, energy neutrality, water efficiency and material neutrality. This paper reviews existing definitions or perspectives on zero impact buildings in order to redefine a more comprehensive definition of zero impact. [less ▲]

Detailed reference viewed: 141 (1 ULiège)
Peer Reviewed
See detailSimultaneous quantification os asiaticoside, asiatic acid, madecassoside and madecassic acid in leaves of Centella asiatica (L.) urb.
Rafamantanana, M. H.; Rozet, Eric ULiege; Raoelison, G. E. et al

Poster (2010)

Detailed reference viewed: 158 (12 ULiège)
See detailSURVEY ON ANTIBIOTIC USE IN PIG AND CHICKEN PRODUCTION IN RED RIVER DELTA OF VIETNAM.
Pham Kim, Dang; Saegerman, Claude ULiege; Vu Dinh, Ton et al

Poster (2010)

Detailed reference viewed: 21 (3 ULiège)
Full Text
Peer Reviewed
See detailUrinary NGAL: Use of absolute value or ratio to creatinine?
Cavalier, Etienne ULiege; Bekaert, Anne-Catherine ULiege; Legrand, Delphine ULiege et al

in Acta Clinica Belgica (2010), 65-3

Introduction: Neutrophil gelatinase-associated lipocalin (NGAL) has emerged as a promising marker for the detection of acute kidney injury. This marker has been proposed for urinary measurement. However ... [more ▼]

Introduction: Neutrophil gelatinase-associated lipocalin (NGAL) has emerged as a promising marker for the detection of acute kidney injury. This marker has been proposed for urinary measurement. However, in the literature, authors indistinctly use "absolute" value or NGAL to creatinine ratio. Up to now, there are no strong arguments favouring for one. This question is of importance as this marker is sensed to be used only on urine random samples. To find an answer to this very practical matter, one approach could be to compare biological CV(intra-individual variation) of the "absolute" and ratio results. [less ▲]

Detailed reference viewed: 388 (0 ULiège)
Full Text
See detailEnvironmental changes in two lakes of Northern Patagonia (Chile): A 1000 yr reconstruction based on pollen and charcoal.
Vargas, N.; Torres, L.; Araneda, A. et al

Poster (2010)

Detailed reference viewed: 61 (4 ULiège)
See detailLes ateliers de potiers romains entre Seine et Rhin
Deru, Xavier ULiege

in Bernal D. (Ed.) Rei Cretariae Romanae Fautorum Acta (2010)

Detailed reference viewed: 40 (0 ULiège)
Full Text
See detailSelf-Awareness Therapy (SAT) for Schizophrenic Patients
Boulanger, Marie ULiege; Nachtergael, Hilde; Pauly, Marc et al

Poster (2010)

Detailed reference viewed: 64 (16 ULiège)
Full Text
Peer Reviewed
See detailPratiques nouvelles en conception industrielle: adaptation des acteurs, des objets médiateurs et des modalités de travail.
Elsen, Catherine ULiege; Dawans, Arnaud ULiege

Conference (2010)

Une intervention in situ de deux mois au sein d’une équipe de conception de produits industriels (designers, dessinateurs), construite sur les méthodologies et théories de l’approche ergonomique « ... [more ▼]

Une intervention in situ de deux mois au sein d’une équipe de conception de produits industriels (designers, dessinateurs), construite sur les méthodologies et théories de l’approche ergonomique « compréhensive », interroge les pratiques nouvelles de ces métiers depuis l’avènement de la CAO. Les « objets médiateurs » sont considérés selon leurs apports respectifs et complémentaires et non plus selon une approche dichotomique, et leur étude structure l’ensemble du recueil des données. Une méthodologie de traitement et d’analyse des informations récoltées est présentée (approche chronologique et analyses « verticales » sur base de lignes du temps). Celle-ci nous permet de tracer les nombreuses adaptations dont font preuve les acteurs tout au long de leur processus: adaptations de leurs outils et représentations, de leurs modalités de travail individuelles ou collaboratives, adaptations et développement de nouvelles compétences. [less ▲]

Detailed reference viewed: 96 (11 ULiège)
Full Text
Peer Reviewed
See detailInfluence du type de fertilisation, du jour de pâturage et du mois de l’année sur les rejets azotés des vaches laitières
Dufrasne, Isabelle ULiege; Istasse, Louis ULiege; Robaye, Vincent ULiege et al

in Marcoen, Jean Marie; Vandenberghe, Christophe (Eds.) Acte de l'atelier "Nitrate - Eau" (2010)

Influence of the fertilization type, the day in the paddock and the month on nitrogen rejections in dairy cows. The present study aims to quantify nitrogen (N) rejections in dairy cows on a rotational ... [more ▼]

Influence of the fertilization type, the day in the paddock and the month on nitrogen rejections in dairy cows. The present study aims to quantify nitrogen (N) rejections in dairy cows on a rotational grazing system with different types of fertilization (compost, slurry and mineral N) at two different days in the paddock (days 3 and 5) and during two different periods (June and September). Grass yield and height were measured along with the chemical composition. The live weight was recorded when the cows moved into the paddock and milk yields was recorded at each milking. N intakes were measured on the basis of the energy requirement. When the cows were in the paddocks, individual samples of faeces and urine were collected to assess N rejections. The urea content in milk from the tank or from the individual cows was also measured. N intake was higher on day 3 than on day 5 and in September as compared with in June but was not influenced by the fertilization. The amount of N produced in milk was not influenced either by the fertilization, by the day on the paddock or by the month. The amount of urinary N was significantly higher in the N mineral group than in the two other groups. The N excretion in faeces and urines was higher on day 3 than on day 5. In June, the N excretion by the urine was lower than in September while the N excretion by the faeces was higher. Equations were calculated in order to estimate the N excretion by the urine in grazing dairy cows from the urea content in milk of a group of cows. [less ▲]

Detailed reference viewed: 49 (3 ULiège)
Full Text
See detailStray light analysis and optimization of the ASPIICS/PROBA-3 Formation Flying solar coronagraph
Mazzoli, Alexandra ULiege; Landini, Federico; Vivès, Sébastien et al

in SPIE, Space Telescopes and Instrumentation 2010 : Optical, Infrared and Millimeter Wave (San Diego, 27 juin-2 juillet) (2010)

PROBA-3 is a technology mission devoted to the in-orbit demonstration of formation flying techniques and technologies. PROBA-3 will implement a giant coronagraph (called ASPIICS) that will both demonstrate ... [more ▼]

PROBA-3 is a technology mission devoted to the in-orbit demonstration of formation flying techniques and technologies. PROBA-3 will implement a giant coronagraph (called ASPIICS) that will both demonstrate and exploit the capabilities and performances of formation flying. ASPIICS is distributed on two spacecrafts separated by 150m, one hosting the external occulting disk and the other the optical part of the coronagraph. This part implements a three-mirror-anastigmat (TMA) telescope. Its pupil is placed about 800mm in front of the primary mirror, a solution allowing an efficient baffling and a high reduction of the stray light inside the instrument. A complete stray light analysis of the TMA has been carried out to design the baffles and to establish the required roughness of the mirrors. The analysis has been performed in two steps: first, by calculating the diffraction pattern behind the occulter due to an extended monochromatic source having the diameter of the Sun; second, by propagating this diffraction pattern, through all the telescope optical components, to the prime focal plane. The results obtained are described in this article. [less ▲]

Detailed reference viewed: 91 (14 ULiège)
Full Text
Peer Reviewed
See detailMatière médicale ou doxographie ? Révision de PSI inv. 3011 (MP3 2388)
Marganne, Marie-Hélène ULiege

in Roselli, Amneris; Boudon-Millot, Véronique; Garzya, Antonio (Eds.) et al Histoire de la tradition et édition des médecins grecs. Actes du VIe Colloque international Paris, 12-14 avril 2008 (2010)

The Greek literary papyrus PSI inv. 3011 (MP3 2388, A.D. IIIin., unknown provenance) contains the opinions of four medical authorities (Antoninos of Cos, Niceratos of Athens, a Thessalian and a Milesian ... [more ▼]

The Greek literary papyrus PSI inv. 3011 (MP3 2388, A.D. IIIin., unknown provenance) contains the opinions of four medical authorities (Antoninos of Cos, Niceratos of Athens, a Thessalian and a Milesian names of which are lost) about several medicinal products; without mentioning the authors, Dioscorides (A.D. I) quotes these fragments in his De materia medica I 73, 77, 79, 81. [less ▲]

Detailed reference viewed: 65 (16 ULiège)
Full Text
See detailFirst results of the HssO key programme
Hartogh, Paul; Crovisier, Jacques; Lellouch et al

in 38th COSPAR Scientific Assembly (2010)

The HssO (Herschel solar system Observations) program aims at determining the distribution, the evolution and the origin of water in Mars, the Outer Planets, Titan, Enceladus and comets, using the three ... [more ▼]

The HssO (Herschel solar system Observations) program aims at determining the distribution, the evolution and the origin of water in Mars, the Outer Planets, Titan, Enceladus and comets, using the three Herschel instruments HIFI, PACS and SPIRE. It addresses the broad topic of water and its isotopologues in planetary and cometary atmospheres. The nature of cometary activity and the thermodynamics of cometary comae will be investigated by studying water excitation in a sample of comets. The D/H ratio, the key parameter for constraining the origin and evolution of Solar System materials, will be measured for the first time in a Jupiter family comet. A comparison with existing and new measurements of D/H in Oort cloud comets will constrain the composition of pre-solar cometary grains and possibly the dynamics of the protosolar nebula. New measurements of D/H in Giant Planets, similarly constraining the composition of proto-planetary ices, will be obtained. The D/H and other isotopic ratios, diagnostics of the evolution of Mars atmosphere, will be accurately measured in H2O and CO. The role of water vapour in the atmospheric chemistry of Mars will be studied by monitoring vertical profiles of H2O and HDO and by searching for several other species (including CO and H2O isotopologues). A detailed study of the source of water in the upper atmosphere of the Giant Planets and Titan will be performed. By monitoring the water abundance, vertical profile, and input fluxes in the various objects, and when possible with the help of mapping observations, we will discriminate between the possible sources of water in the Outer Planets (interplanetary dust particles, cometary impacts, and local sources). First results on comets, Mars and the outer planets will be presented. [less ▲]

Detailed reference viewed: 50 (10 ULiège)
Peer Reviewed
See detailThe ratio of PTH as measured by third and second generation assays as a marker for parathyroid carcinoma
Cavalier, Etienne ULiege; Daly, Adrian ULiege; Chapelle, Jean-Paul ULiege et al

in 12th European Congress of Endocrinology - ICE 2010 (2010)

Detailed reference viewed: 14 (1 ULiège)
Full Text
Peer Reviewed
See detailLazy sensors for the scheduling of measurement samples transmission in linear closed loops over networks
Forni, Fulvio ULiege; Galeani, Sergio; Nesic, Dragan et al

in 49th IEEE Conference on Decision and Control (cdc 2010) (2010)

We consider an exponentially stable close-loop interconnection of a continuous linear plant and a continuous linear controller, and we study the problem of interconnecting the plant output to the ... [more ▼]

We consider an exponentially stable close-loop interconnection of a continuous linear plant and a continuous linear controller, and we study the problem of interconnecting the plant output to the controller input through a network. We propose a family of "lazy sensors" whose goal is to transmit the measured plant output information as little as possible while preserving closed-loop stability. In particular, we propose three transmission policies, providing conditions on the transmission parameters. These guarantee global asymptotic stability when the plant state is available, and global practical stability when the plant state is not available. Simulation results confirm the effectiveness of the proposed strategies. [less ▲]

Detailed reference viewed: 28 (8 ULiège)
Full Text
See detailResponse inhibition toward alcohol cues in heavy drinkers and alcohol dependent patients
Kreusch, Fanny ULiege; Quertemont, Etienne ULiege

in Alcoholism, Clinical & Experimental Research (2010), 34(8), 139-139

Alcohol addictive behaviors have been recently associated with a combination of deficits in executive function, such as a weak response inhibition, and potent automatic appetitive responses for alcohol ... [more ▼]

Alcohol addictive behaviors have been recently associated with a combination of deficits in executive function, such as a weak response inhibition, and potent automatic appetitive responses for alcohol-related cues. The aim of the present studies was to investigate response inhibition for alcohol and neutral or soft drink cues in alcohol abusers and alcohol dependent patients. Response inhibition was assessed in a go/nogo task with pictures of alcohols, soft drinks or neutrals objects. In this task, participants had to respond to specific stimuli (go trial) and inhibit that action under a different set of stimuli (nogo trial). Faster responses for alcohol in go trials reflect approach tendency for alcohol cues while false alarm responses for alcohol in nogo trials reflect a deficit in response inhibition toward alcohol-related cues. Moreover, since standard alcohol cues are not equally appreciated across participants, the preference for the different alcoholic drinks presented were measured and analyzed in reference to task responses. Both light and heavy drinkers showed faster responses to alcohol cues in go trial relative to soft/neutral cues. Preliminary results indicate a negative relationship between the preference scores for alcohols and the reaction times to those stimuli in go trials. The present study also demonstrated that the presence of brands logo significantly altered the discrimination and reactions time patterns of response to alcohol and soft cues. [less ▲]

Detailed reference viewed: 96 (25 ULiège)
Full Text
Peer Reviewed
See detailStochastic analysis of a stadium roof from deterministic wind tunnel measurements
Blaise, Nicolas ULiege; Denoël, Vincent ULiege

in 13th International Conference on Wind Engineering (2010)

Dynamic analyses of structures under buffeting wind loads can be performed in a deterministic (Clough and Penzien, 1997) or stochastic (Preumont, 1994) context, both with a modal approach for ... [more ▼]

Dynamic analyses of structures under buffeting wind loads can be performed in a deterministic (Clough and Penzien, 1997) or stochastic (Preumont, 1994) context, both with a modal approach for computational efficiency reasons. In the first option, the forces are deterministically given, and the uncoupled modal equations of motion are solved either in the time domain with a stepby- step method, either in the frequency domain, with Fourier transformation. In the second option, the analysis relies on the determination of the Power Spectral Density (PSD) matrix of the structural response given that of the loading. The choice of one or another method usually depends on whether the loading is provided in the time or frequency domain and as a deterministic (a single time history) or stochastic manner. From a designer’s point of view, the wind loading can be defined using design codes (e.g. Eurocode, 2005) where analytical expressions of (i) the PSD of wind velocities (Davenport, Von Karman, etc) (ii) the coherence functions and (iii) the pressure coefficients are given to compute, finally, (iv) the PSD of the aerodynamic pressures. Design engineers are usually familiar with this probabilistic approach. Alternatively, the design may be conducted from aerodynamic pressures measured in a wind tunnel. This approach is more realistic than the aforementioned codified procedure since a number of phenomena as (a) the aerodynamic instabilities, (b) aerodynamic admittance (Scanlan and Jones, 1999), (c) site effects are taken into account. Pressures are thus given as unique (deterministic) time histories at each sensor. In a Finite Element context and a modal analysis, the generalized forces are computed from the measured pressures. With the firm wish to perform the analysis in a stochastic manner (for a number of good reasons mentioned next), we suggest to fit a probabilistic model to the measured data. Such a model could be fitted to the measured pressures right away, or any other subsequent quantity such as the generalized forces. The following discussion is about the most favorable quantity that has to be fitted and how to do it appropriately in view of typical measurement imperfections. [less ▲]

Detailed reference viewed: 50 (15 ULiège)
Full Text
Peer Reviewed
See detailResidual stress measurement in dental prostheses by hole-drilling.
Mainjot, Amélie ULiege; Schajer, Gary; Vanheusden, Alain ULiege et al

Poster (2010)

Detailed reference viewed: 47 (4 ULiège)
See detailFlora and plant communities of the city of Bujumbura (Burundi): diversity, origin and conservation value.
Bigirimana, J; Bogaert, Jan ULiege; De Cannière, C et al

in Bogaerts, A; Robbrecht, E; Rammeloo, J (Eds.) ). Botanical diversity: exploration, understanding and use (2010)

Detailed reference viewed: 9 (1 ULiège)
Full Text
See detailMutliproxy investigation of climatic and anthropogenic changes in a Baltic bog (N. Poland) during the last millennium
De Vleeschouwer, François; Fagel, Nathalie ULiege; Piotrowska, Natalia et al

Poster (2010)

Detailed reference viewed: 24 (2 ULiège)
Full Text
Peer Reviewed
See detailMeasuring the Interactions among Variables of Functions over the Unit hypercube
Marichal, Jean-Luc; Mathonet, Pierre ULiege

in Modeling Decisions for Artificial Intelligence 7th International Conference, MDAI 2010 (2010)

By considering a least squares approximation of a given square integrable function f:[0,1]^n to R by a multilinear polynomial of a specified degree, we define an index which measures the overall ... [more ▼]

By considering a least squares approximation of a given square integrable function f:[0,1]^n to R by a multilinear polynomial of a specified degree, we define an index which measures the overall interaction among variables of f. This definition extends the concept of Banzhaf interaction index introduced in cooperative game theory. Our approach is partly inspired from multilinear regression analysis, where interactions among the independent variables are taken into consideration. We show that this interaction index has appealing properties which naturally generalize the properties of the Banzhaf interaction index. In particular, we interpret this index as an expected value of the difference quotients of f or, under certain natural conditions on f, as an expected value of the derivatives of f. These interpretations show a strong analogy between the introduced interaction index and the overall importance index defined by Grabisch and Labreuche. Finally, we discuss a few applications of the interaction index. [less ▲]

Detailed reference viewed: 20 (0 ULiège)
Full Text
See detailSelective epitaxial growth of III-V semiconductor heterostructures on Si substrates for logic applications
Nguyen, Ngoc Duy ULiege; Wang, Gang; Waldron, Niamh et al

in 218th ECS Meeting, 2010 (2010)

Detailed reference viewed: 82 (6 ULiège)
Peer Reviewed
See detailInformation-Theoretic Inference of Gene Networks Using Backward Elimination.
Meyer, Patrick ULiege; Marbach, Daniel; Roy, Sushmita et al

in BIOCOMP'10 (2010)

Detailed reference viewed: 45 (5 ULiège)
Full Text
Peer Reviewed
See detailConsommation alimentaire et revenu familial dans la zone périurbaine de Hanoi
Vu Dinh, Ton; Phan Dang, Thang; Duquesne, Brigitte ULiege et al

in University of Parma, Faculty of Economics (Ed.) 116th EAAE Seminar "Spatial dynamics in agri-food systems : implications for sustainability and consumer welfare (2010)

Detailed reference viewed: 143 (31 ULiège)
Full Text
See detailActivité antibactérienne et Technique d'extraction
Ramdani, M.; Benchat, N.; Fadel, O. et al

Poster (2010)

L’évaluation de l’activité antibactérienne fait l’objet de nombreuses études dans le domaine des plantes aromatiques et médicinales. Les résultats obtenus correspondent généralement à une technique ... [more ▼]

L’évaluation de l’activité antibactérienne fait l’objet de nombreuses études dans le domaine des plantes aromatiques et médicinales. Les résultats obtenus correspondent généralement à une technique d’extraction employée. Notre travail a pour objectif d’étudier l’effet de la technique d’extraction sur l’activité antibactérienne des huiles essentielles extraites à partir de certaines plantes aromatiques et médicinales. Nous avons préparé deux échantillons d’huiles essentielles par hydro-distillation conventionnelle et par hydro-distillation assistée par micro-ondes. Une série d’expériences a été effectuée sur un groupe de bactéries : E. coli, Staphylococcus, Klépsilla, Protéus, Bacillus. Les résultats obtenus ont montré que l’activité antibactérienne est nettement supérieur dans le cas du chauffage classique pour E. coli et Bacillus. Ceci montre que la composition chimique est différente pour les deux échantillons d’huiles essentielles. Les travaux effectués confirment que l’activité antibactérienne dépend directement de la technique d’extraction utilisée. [less ▲]

Detailed reference viewed: 63 (1 ULiège)
Full Text
Peer Reviewed
See detailPerformance monitoring of an industrial boiler: classification of relevant variables with Random Forests
Sainlez, Matthieu ULiege; Heyen, Georges ULiege

in Pierucci, Sauro; Ferraris, Guido Buzzi (Eds.) 20th European Symposium on Computer Aided Process Engineering – ESCAPE20 (2010)

A data mining methodology, the random forests, is applied to analyze pollutant emission from the recovery boiler of a Kraft pulping process. Starting from a large database of raw process data, the goal is ... [more ▼]

A data mining methodology, the random forests, is applied to analyze pollutant emission from the recovery boiler of a Kraft pulping process. Starting from a large database of raw process data, the goal is to identify the input variables that explain the most output variations. [less ▲]

Detailed reference viewed: 51 (11 ULiège)
Full Text
See detailA 14,000 yr elemental and lead isotopis record in a peat core in the south of Poland –results and interpretation
Tudyka, K.; De Vleeschouwer, F.; Pazdur, A. et al

Poster (2010)

Detailed reference viewed: 49 (4 ULiège)
Peer Reviewed
See detailRôle de la faune sauvage dans l'épidémiologie de la paratuberculose
Linden, Annick ULiege

Conference (2010)

Detailed reference viewed: 16 (1 ULiège)
Full Text
Peer Reviewed
See detailChoix technologiques pour l’informatisation de l’Atlas Linguistique de la Wallonie
Mazziotta, Nicolas ULiege

in Upton, Clive; Heselwood, Barry (Eds.) Proceedings of Methods XIII. Papers from the Thirteenth International Conference on Methods in Dialectology, 2008 (2010)

Detailed reference viewed: 30 (6 ULiège)
Peer Reviewed
See detailInvestigation of the influence of surface roughness modification of bone tissue engineering scaffolds
Kerckhofs, Greet ULiege; Pyka, Grzegorz; Van Bael, Simon et al

in Abstract book SkyScan User Meeting 2010 (2010)

Detailed reference viewed: 5 (4 ULiège)
Full Text
See detailAtmospheric lead deposition in an ombrotrophic peat bog of Southern Poland
Fiałkiewicz-Kozieł, B.; De Vleeschouwer, F.; Smieja-Król, B. et al

Poster (2010)

Detailed reference viewed: 26 (0 ULiège)
Peer Reviewed
See detailOptimal design for functional magnetic resonance imaging (fMRI) experiments based on linear models
Maus, Bärbel ULiege; van Breukelen, Gerard J P; Goebel, R et al

Conference (2010)

In the first part of this presentation it will be shown how the general linear model is used to describe experimental functional magnetic resonance imaging (fMRI) data from one subject. Functional ... [more ▼]

In the first part of this presentation it will be shown how the general linear model is used to describe experimental functional magnetic resonance imaging (fMRI) data from one subject. Functional magnetic resonance imaging is a neuroimaging method which is used to study the human brain and its functional areas. Based on the general linear model, optimal designs for one-subject fMRI experiments can be obtained by application of the D- and A-optimality criterion. Because of the huge design space for fMRI experiments, a genetic algorithm (GA) is employed to find optimal designs for fMRI experiments based on a multi-objective design criterion. The second part of the presentation will focus on the application of mixed effects models in analysis of fMRI experiments from multiple subjects. Optimal designs for multi-subject experiments are considered and the optimal combination of number of subjects and fMRI scanner time/imaging time per subject will be studied with respect to a linear cost function. [less ▲]

Detailed reference viewed: 32 (0 ULiège)
Full Text
Peer Reviewed
See detailQuelles perspectives durables pour le vermicelle de tolomane dans la province de Hung Yen (Vietnam) ?
Vy Le Thi, Long; Vu Dinh, Ton; Duquesne, Brigitte ULiege

in University of Parma, Faculty of Economics (Ed.) 116th EAAE Seminar "Spatial dynamics in agri-food systems : implications for sustainability and consumer welfare" (2010)

Le but de cette étude est de proposer des axes de recherche en vue de renforcer, dans une perspective de développement durable, la transformation locale et la commercialisation d'un produit traditionnel ... [more ▼]

Le but de cette étude est de proposer des axes de recherche en vue de renforcer, dans une perspective de développement durable, la transformation locale et la commercialisation d'un produit traditionnel vietnamien typique : le vermicelle de tolomane. [less ▲]

Detailed reference viewed: 62 (6 ULiège)
Full Text
Peer Reviewed
See detailWhen do faces capture attention? Evidence from eye movements
Devue, Christel ULiege; Belopolsky, Artem; Theeuwes, Jan

in Perception (2010), 39 Suppl.

A recent visual search study showed that the presence of an upright distractor face slows the search for a butterfly target while a butterfly distractor does not affect the search for a target face ... [more ▼]

A recent visual search study showed that the presence of an upright distractor face slows the search for a butterfly target while a butterfly distractor does not affect the search for a target face, suggesting that faces capture attention automatically (Langton et al, 2008 Cognition 107 330-342). To further test this hypothesis, we recorded eye movements during a cued target search task. When the search target alternated between a face and a butterfly (Experiment 1), faces were found faster and with less saccades than butterflies. The presence of the opposite distractor (eg a face during a search for a butterfly) slowed down the search but to a greater extent when the distractor was a face. Moreover, faces captured the eyes more frequently than butterflies. Inverted face targets were also found more efficiently than inverted butterfly targets and captured the eyes more than butterflies when presented as distractors (Experiment 2). However, when upright or inverted faces consistently appeared as irrelevant distractors during a butterfly or a flower target search (Experiment 3), they did not cause significant disruption. These results challenge the view that faces capture attention automatically and suggest that faces only attract attention when their processing is relevant during a search task. [less ▲]

Detailed reference viewed: 74 (5 ULiège)
Full Text
See detailA paleorecord of atmospheric lead deposition in France. New data from “La Godivelle” peat bog (Puy de Dôme)
De vleeschouwer, F.; Mattielli, N.; Renson, V. et al

Poster (2010)

Detailed reference viewed: 18 (0 ULiège)
Full Text
Peer Reviewed
See detailConscience du fonctionnement de la mémoire dans la maladie d’Alzheimer
Jaspar, Mathieu ULiege; Feyers, Dorothée ULiege; Bastin, Christine ULiege et al

in Proceedings du XIeme colloque international sur le vieillissement cognitif (2010)

Detailed reference viewed: 80 (19 ULiège)
Full Text
See detailBenthic remineralisation in the Northeast European Continental margin (Northern Biscay Bay)
Suykens, K.; Schmidt, S.; Delille, Bruno ULiege et al

Poster (2010)

Detailed reference viewed: 21 (1 ULiège)
Full Text
Peer Reviewed
See detail"What is Africa to me? The Mnemopoetics of Africa in African American Drama”
Bada, Valérie ULiege

in Ledent, Bénédicte; Ghyssels, Kathleen (Eds.) Présence Africaine en Europe et au-delà. African Presence in Europe and Beyond (2010)

Detailed reference viewed: 22 (6 ULiège)
See detailNumerical simulations of the wind of magnetic massive star HD191612
ud-Doula, Asif; Nazé, Yaël ULiege

Poster (2010)

Detailed reference viewed: 16 (1 ULiège)
Full Text
Peer Reviewed
See detailThe effect of pasture utilization on the defoliation of grass species by steers grazing a tropical savanna woodland during the dry season
Benvenutti, Marcelo; Bindelle, Jérôme ULiege; O'Reagain, Peter et al

in Advances in Animal Biosciences (2010), 1

The relationship between grazing pressure and differences in the defoliation rate of grass species is not well understood for tropical savannas even though it is likely to have a substantial influence on ... [more ▼]

The relationship between grazing pressure and differences in the defoliation rate of grass species is not well understood for tropical savannas even though it is likely to have a substantial influence on the persistence of preferred species, pasture condition and sustainability of the grazing system. The objective of this study was to examine the relationship between grass species characteristics and their defoliation rate in a paddock under increasing levels of utilization. Nine steers grazed a Eucalyptus savanna woodland for 14 days. Total pasture utilization reached 70% on day 13. The results confirm that with increasing pasture utilization, the defoliation rate of grasses varied among species. Bothriochloa pertusa (Bp) was the preferred species, with the highest levels of utilization after 5, 7 and 13 days. This species had the highest leaf/stem ratio and basal area (P<0.05), and intermediate stem tensile resistance, stem density, bulk density and plant height. These characteristics probably allowed the steers to achieve high nutrient intake rates. The steers avoided B. ewartiana possibly due to its tough stems and low leaf/stem ratio. In this tropical pasture the steers heavily grazed the preferred species at low to intermediate levels of overall pasture utilization (10 to 38%). In order to increase the utilization of less preferred species it was necessary to achieve high levels of pasture utilization (60 to 70%). [less ▲]

Detailed reference viewed: 74 (20 ULiège)
Full Text
Peer Reviewed
See detailIdentification of chromosomal regions associated with segregation distortion of SSR markers and the genes controlling the low-gossypol seed & high-gossypol plant trait of Gossypium sturtianum
Benbouza, H.; Diouf, F.B.; Schefflers, J. et al

Conference (2010)

Distorted segregation of DNA markers is commonly encountered, especially in inter-specific crosses. Our main objective in this study was to identify chromosomal regions consistently associated with ... [more ▼]

Distorted segregation of DNA markers is commonly encountered, especially in inter-specific crosses. Our main objective in this study was to identify chromosomal regions consistently associated with segregation distortion in [(G. hirsutum x G. raimondii) x G. sturtianum] (HRS) hybrid. Segregation distortion skews the genotypic frequencies from their Mendelian expectations. In HRS progeny, chi square analysis (P < 0.01) showed significant skewed in all targeted linkage groups c2-c14, c3-c17, and c6-c25. Chromosomal region was regarded as being associated with skewed segregation, if three or more closely linked markers exhibited significant segregation distortion in one or more population(s). The targeted introgression regions in the tested population seem to be favourable for segregation distortion. Segregation distortion in HRS hybrid progenies differed in male and female gametes. Furthermore, the data indicated that the environment has strongly influenced the transfer of SSR markers through microspores. The consistent location of these chromosomal regions in selfed and backcross of HRS derivatives indicate probably the identification of segregation distortion regions (SDRs) in HRS hybrid. Comparison with results regarding the segregation distortion regions obtained in previous research by other authors and results we obtained regarding the absence of recombinations between BNL3436 and BNL1153 markers mapped on c6-c25 chromosome and spanned by 64 cM on the G. hirsutum map, after several generations of selfing, arise the question of the conservation of the gene order and spacing in G. sturtianum. Results showed that three SSR markers mapped on c6-c25 linkages groups were systematically transmitted in all selected progenies of the HRS tri-specific hybrid. Furthermore, the high percentages of loci with significant segregation distortion observed in this study suppose that a genetic mechanism may exist for preferential transmission of alien chromosomes segments. High heterozygosity frequencies (+/- 80%) were observed for all conserved G. sturtianum SSR markers, after several generations of backcrossing and selfing, which indicate that the cytogenetic and genetic conditions for obtaining homozygotes at high frequency are not met. [less ▲]

Detailed reference viewed: 20 (1 ULiège)
Full Text
Peer Reviewed
See detailHydrothermal synthesis, crystal chemistry, and stability of fillowite-type phosphates in the Na-Mn-Fe2+-Mg-PO4 system
Rondeux, Mélanie ULiege; Hatert, Frédéric ULiege

in Acta Mineralogica-Petrographica, Abstract series (2010), 6

Detailed reference viewed: 27 (3 ULiège)
Full Text
See detailObservations of nebulae ejected by massive stars with PACS
Vamvatira-Nakou, Chloi ULiege; Royer, P.; Hutsemekers, Damien ULiege et al

Poster (2010)

Detailed reference viewed: 90 (66 ULiège)
Full Text
Peer Reviewed
See detailDifferences in carbohydrate composition of barley varieties influence Salmonella transmission among pen mate weaned piglets
Bindelle, Jérôme ULiege; Pieper, Robert; Marshall, Jason et al

in Journal of Animal Science (2010), 88(E2), 284

Indigestible carbohydrate (CHO) composition can vary markedly between barley varieties. They induce changes in intestinal ecophysiology and enhance growth of health-promoting bacteria. An experiment was ... [more ▼]

Indigestible carbohydrate (CHO) composition can vary markedly between barley varieties. They induce changes in intestinal ecophysiology and enhance growth of health-promoting bacteria. An experiment was undertaken to assess whether these changes could influence Salmonella typhimurium (ST) infection in pigs and transmission between penmates. A challenge study was undertaken using 84 recently weaned piglets divided in 12 pens, and fed one of the 4 experimental diets (3 pens/diet), according to the barley variety. Three hullless and one hulled varieties were chosen according to their differing CHO composition (amylose/amylopectin, β-glucan, and insoluble non-starch polysaccharides). After 14 d of adaptation, 2 pigs per pen (Trojan pigs, TrojP) were orally infected (8.0 log cfu/animal) with a low virulent, nalidixic acid and novobiocin resistant ST strain. The other animals were considered as Contact pigs (ConP) to assess ST transmission. Over 5 d following inoculation, pigs were monitored for detection of ST in the feces using plate counts. On d 6, 2 TrojP and 2 ConP per group were killed and intestinal samples as well as organ samples (liver, spleen, and lymph nodes) were analyzed for ST. The results showed that in TrojP, the cereal variety had no influence on ST fecal shedding over time and gastrointestinal tract (GIT) colonization. All pigs were positively tested for ST. Translocation of ST to lymph nodes was observed frequently but not to other organs. In ConP, compared with hulled barley, hulless barleys reduced the number of animals shedding ST (P < 0.05 for d 2) and the number of ST (cfu/g) in cecum on d 6 (P < 0.01). Although hulless barleys did not protect against colonization when directly challenged at a high oral dose, these barleys may be useful to reduce natural ST transmission among penmates. [less ▲]

Detailed reference viewed: 54 (5 ULiège)
Full Text
See detailChemical Composition and Antimicrobial Activity of the Essential Oil of Myrtus communis L. from Algeria
Brada, M.; Hennia, A.; Nemmiche, S. et al

Poster (2010)

This study deals with the valorisation of medicinal and aromatic plants of the Algerian flora, in order to find new bioactive natural products. Myrtus communis essential oil obtained by hydrodistillation ... [more ▼]

This study deals with the valorisation of medicinal and aromatic plants of the Algerian flora, in order to find new bioactive natural products. Myrtus communis essential oil obtained by hydrodistillation was investigated by capillary gas chromatography and gas chromatography/mass spectrometry. Twenty-seven volatile compounds were identified in the leaves essential oil; the major components were: -pinene (23.5 %), limonene (22.9 %), 1,8-cineole (16.1 %), linalool (13.0%), linalyl acetate (10.9%) and geranyl acetate (4.6%). The antibacterial activity of essential oils extracts was evaluated by the diffusion method and by the dilution method in liquid medium on pathogenic bacteria (Staphylococcus aureus, Escherichia coli, Salmonella sp, Proteus sp and Klebsiella sp). [less ▲]

Detailed reference viewed: 82 (0 ULiège)
Full Text
See detailImportance of pigtailed macaques (Macaca nemestrina leonina) in seed dispersal: impact on the ecological balance of the tropical rainforest at Khao Yai National Park, Thailand
Albert, Aurélie ULiege; Huynen, Marie-Claude ULiege; Savini, Tommaso ULiege

Poster (2010)

Today, many countries of South-East Asia know about the alarming state of the forests existing on their territory and all agree that it is essential to save the remaining primary forest but also to enable ... [more ▼]

Today, many countries of South-East Asia know about the alarming state of the forests existing on their territory and all agree that it is essential to save the remaining primary forest but also to enable the regeneration of degraded areas, through natural or artificial reforestation. The conservation of tropical rainforests thus passes by the necessity to better understand the plant-animal interactions, and in particular, the seed dispersal process. While following a troop of pigtailed macaques (Macaca nemestrina leonina) accustomed to Man in Khao Yai National park (2 168 km ²), Thailand, we will bring important data relating to these seed dispersers potentially necessary but unfortunately vulnerable. Indeed, this vulnerable but little known species, seems to be essential to maintain forest diversity by dispersing many plant species, particularly those inaccessible to smaller frugivores. First results already show that they disperse many seed species, of all kind of size, in all forest types, from primary forest to secondary forest, thanks to various handling techniques. They also seem to show an adaptation in their daily travels according to resources availability. The next fieldworks will enable us to bring more precision in these results and their temporal variations and thus to conclude on the potential role of Macaca nemestrina in the tropical rainforest regeneration. [less ▲]

Detailed reference viewed: 28 (1 ULiège)
Peer Reviewed
See detailExploring the potential of crop specific green area index time series to improve yield estimation at regional scale
Duveiller, Gregory; de Wit, Allard; Kouadio, Amani Louis ULiege et al

in Sobrino, J. A. (Ed.) Proceedings of the 3rd International Symposium on Recent Advances in Quantitative Remote Sensing (RAQRS'III) (2010)

Crop status, such as the Green Area Index (GAI), can be retrieved from satellite observations by modelling and inverting the radiative transfer within the canopy. Providing such information along the ... [more ▼]

Crop status, such as the Green Area Index (GAI), can be retrieved from satellite observations by modelling and inverting the radiative transfer within the canopy. Providing such information along the growing season can potentially improve crop growth modelling and yield estimation. However, such approaches have proven difficult to apply on coarse resolution satellite data due to the fragmented land cover in many parts of the World. Advances in operational crop mapping will sooner or later allow the production of crop maps relatively early in the crop growth season, thereby providing an opportunity to sample pixels from medium/coarse spatial resolution data with relatively high cover fraction of a particular crop type to derive crop specific GAI time series. This research explores how to use such time series derived from MODIS to produce indicators of crop yield using two approaches over part of Belgium. The first method consists in looking at metrics of the decreasing part of the GAI curves when senescence occurs. Such metrics, like the position of the inflexion point, have been shown to be significantly correlated to yield. The second approach is to optimize the WOFOST model used in the European Crop Growth Monitoring System (CGMS) based on the GAI time series. Results show that, although the optimized model shows considerably better performance than the model running on the default parameter, the model is sometimes outperformed by the simpler metric approach. In all cases, indicators including remote sensing information provide better estimates that the average yield of previous years. [less ▲]

Detailed reference viewed: 115 (8 ULiège)
Full Text
See detailModels describing the use of resources as basis for decision making
Kopriwa, Nicole; Pfennig, Andreas ULiege

in Proceedings of Megacities - Interactions Between Land Use and Water Management (2010)

Detailed reference viewed: 13 (0 ULiège)
Full Text
Peer Reviewed
See detailDamage modelling in geotechnics: micromechanical approaches
Levasseur, Séverine ULiege; Collin, Frédéric ULiege; Charlier, Robert ULiege et al

in Zhao, Jian; Labiouse, Vincent; Dudt, Jean-Paul (Eds.) et al EUROCK2010: Rock Mechanics in Civil and Environmental Engineering (2010)

The mechanical behaviours of geomaterials are significantly affected by the presence of voids or cracks-like defects. The modelling of such behaviour is classically performed by considering purely ... [more ▼]

The mechanical behaviours of geomaterials are significantly affected by the presence of voids or cracks-like defects. The modelling of such behaviour is classically performed by considering purely macroscopic or micromechanically-based damage models. In the perspective of applications in civil engineering or in geomechanics, we propose in this paper to evaluate a homogenization approach, based on Mori-Tanaka scheme, applied to microcracked materials. In order to provide an appropriate interpretation of the nonlinear behaviour at macro-scale, the crack-induced damage is coupled to friction phenomena on closed cracks lips. The predictions of the coupled model are first analysed on laboratory tests performed on Callovo-Oxfordian Clay. Then, they are extended to a numerical analysis of excavation damaged zones around tunnels. [less ▲]

Detailed reference viewed: 58 (1 ULiège)
Full Text
Peer Reviewed
See detailExtracting Meronymy Relationships from Domain-Specific, Textual Corporate Databases
Ittoo, Ashwin ULiege; Bouma, Gosse; Maruster, Laura et al

in Lecture Notes in Computer Science (2010)

Detailed reference viewed: 41 (0 ULiège)
Full Text
Peer Reviewed
See detailApproaches for assessing potential impacts of thyroid hormone disrupting chemicals in wild sea bass (Dicentrarchus labrax)
Schnitzler, Joseph ULiege; Klaren, Peter; Thomé, Jean-Pierre ULiege et al

Poster (2010)

Organic compounds such as pesticides and polychlorobiphenyls (PCBs) are well described endocrine disrupters; of particular interest are effects on thyroid function. To assess the ability of occurring ... [more ▼]

Organic compounds such as pesticides and polychlorobiphenyls (PCBs) are well described endocrine disrupters; of particular interest are effects on thyroid function. To assess the ability of occurring pollutants in European coastal areas to disrupt the thyroid system in sea bass, a field study in the major European estuaries, namely, the Scheldt, the Seine, the Loire, the Charente and the Garonne has been conducted. Several thyroid endpoints were simultaneously examined. Diameter of follicles and the epithelial cell heights give an indication on the production and secretion activity of the thyroid gland. The activity of enzymes involved in the metabolism (deiodination, glucuronidation and sulfatation) of thyroid hormones was analyzed. Finally thyroxine (T4) and triiodothyronine (T3) concentrations were analyzed in muscle by radioimmunoassay. The combined use of all those endpoints gives us an overview of the complex thyroid hormone system. PCB concentration in wild fish varied from 10 to 100 ng g-1 wet weight (ww) depending on length and location. Each region has its own contamination levels and profiles reflecting the contribution of pollutants from rivers. The contamination levels were as follows: the highest concentrations were measured in individuals collected from the coastal region near the Scheldt > Seine > Loire > Charente and the lowest levels were observed in sea bass from coastal regions near the Garonne. Measurements of metabolic activity revealed an altered hepatic T4 outer ring deiodinase whereas T4 sulfatation and T4 glucuronidation were not affected. Owing to the extensive autoregulatory feedback at both central and peripheral levels, the thyroid hormone concentrations were preserved despite the PCB induced changes in thyroid hormone dynamics. [less ▲]

Detailed reference viewed: 37 (6 ULiège)
Full Text
Peer Reviewed
See detailAgroécologie: Le chainon manquant. Rôle de consommateurs et d'ONG dans les processus émergeants d'apprentissage
Stassart, Pierre M ULiege; Claes, Chris

in Anonyme (Ed.) Proceeding ISDA 2010 Innovation Sustainable Development of Agriculture (2010)

Abstract — Academic texts on agro-ecology are often too limited to production systems. When notions of food systems and food value chains are described they introduce the consumer as a choice taker ... [more ▼]

Abstract — Academic texts on agro-ecology are often too limited to production systems. When notions of food systems and food value chains are described they introduce the consumer as a choice taker, reflecting neoclassical economic theory. The study of the emergence of two agro-ecological chains in Benin and Belgium explains how consumer demands are key learning resources for chain co-creation. In the case of the fair trade rice chain an NGO stimulates the co-creation process while in the beef chain in Gaume consumers who are directly involved in a deliberative process bring about this questioning. [less ▲]

Detailed reference viewed: 139 (9 ULiège)
Full Text
See detailDE LA CULTURE ITINERANTE SUR BRULIS AUX JACHERES ENRICHIES PRODUCTRICES DE CHARBON DE BOIS, EN R. D. DU CONGO
Peltier, Régis; Bisiaux, Franck; Dubiez, Emilien et al

Conference (2010)

—From slash-and-burn to slash-and-charcoal in R.D. Congo Kinshasa, the capital of the Democratic Republic of the Congo, has some 8 million inhabitants and is mainly surrounded by savanna and patches of ... [more ▼]

—From slash-and-burn to slash-and-charcoal in R.D. Congo Kinshasa, the capital of the Democratic Republic of the Congo, has some 8 million inhabitants and is mainly surrounded by savanna and patches of degraded forest. Estimated fuelwood consumption is in the range of 3 to 6 million tones of fuelwood equivalent per year (representing 0.6 to 1.2 MT of charcoal per year if all the wood were charcoaled). The Mampu project was designed as the pilot phase of a reforestation project covering 100 000 hectares of sandy soil on the Bateke plateau and aiming to remedy wood and charcoal scarcities. Despite the conflicts, about 8000 hectares of Acacia auriculiformis were planted, mainly from 1987 to 1993. From about 1994, the Mampu plantation was divided into 25 hectare plots for 320 farming families. Cultivation mainly follows the agroforestry pattern based on improved fallows, which draws on traditional slash-and-burn farming. Total charcoal production from the plantation varies from 8 000 to 12 000 tonnes per year, in addition to 10 000 T/year of cassava, 1 200 T/year of maize and 6 T/year of honey. The success of the project is an incentive to apply the model to the savanna lands on the Bateke plateaus, taking traditional land rights into consideration and continuing activities to diversify and process production locally. This will help to cover a larger share of urban needs for renewable energy while also creating rural employment. However, other agroforestry systems deserve to be tested or developed for different ecological and social or economic conditions across the country, such as management of the natural regrowth of local multiple-use species as applied with the traditional system of fallow enrichment (Nkunku) in the Lower Congo. [less ▲]

Detailed reference viewed: 102 (27 ULiège)