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See detailLa théorie de l'attachement
Degraux, Christine ULg

Conference (2010, February 25)

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See detailÉvolution(1979-2008)des services d'hospitalisation en Belgique. Quel(s) liens avec la hiérarchie urbaine?
Trotta, Marie ULg

Conference (2010, February 24)

L'organisation de l'offre hospitalière ainsi que sa planification se voient aujourd'hui bouleversées par les logiques de marché ou d'efficience progressivement introduites dans le système hospitalier en ... [more ▼]

L'organisation de l'offre hospitalière ainsi que sa planification se voient aujourd'hui bouleversées par les logiques de marché ou d'efficience progressivement introduites dans le système hospitalier en Belgique comme dans les pays voisins. Ce bouleversement n’est pas sans impact sur l’organisation spatiale des services de soins. Toutefois, si certains auteurs y voient un renforcement de la relation à la hiérarchie urbaine, d’autres soutiennent l’hypothèse de l’émergence d’un tout autre modèle organisationnel : le réseau. L’objectif de cette recherche était de comparer l'organisation spatiale des services d’hospitalisation juste avant l’introduction d’un moratoire stoppant la croissance hospitalière (année 1979) avec la situation actuelle (année 2008) au travers de leur relation à la hiérarchie urbaine sur le territoire belge afin de soutenir l’une ou l’autre hypothèse. Si un renforcement de la relation n’apparaît que très légèrement, on a surtout pu démontrer un comportement différencié selon le type de services analysés et leur place dans la pyramide des soins. Promoteur du Mémoire : Bernadette Mérenne-Schoumaker. [less ▲]

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See detailPrécision du positionnement par satellites: influence de la géométrie de la constellation
Lonchay, Matthieu ULg

Conference (2010, February 24)

De nombreux facteurs sont susceptibles d’influencer la précision des systèmes globaux de positionnement et de navigation par satellites (GNSS, Global Navigation Satellite System), dont la géométrie de la ... [more ▼]

De nombreux facteurs sont susceptibles d’influencer la précision des systèmes globaux de positionnement et de navigation par satellites (GNSS, Global Navigation Satellite System), dont la géométrie de la constellation. La qualité de la géométrie de la constellation s’évalue au moyen d’un indicateur : le DOP (Dilution Of Precision). Certaines formes très particulières de la géométrie de la constellation nuisent de manière importante à la précision du positionnement par satellites. C’est le cas de la constellation de forme conique. Ces situations particulières se caractérisent par un état singulier de la matrice normale et de hautes valeurs du DOP. [less ▲]

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See detailLes flux de CO2 en grandes cultures
Dufranne, Delphine ULg; Jerome, Elisabeth ULg; Moureaux, Christine ULg et al

Conference (2010, February 24)

Detailed reference viewed: 35 (13 ULg)
Peer Reviewed
See detailPragmatic inferencing and the rise of the go-future in Egyptian
Grossman, Eitan; Polis, Stéphane ULg

Conference (2010, February 24)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailCloud-free satellite data for operational applications using DINEOF
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Sirjacobs, Damien ULg et al

Conference (2010, February 24)

DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique to reconstruct missing data in satellite data sets, such as gaps created by the presence of clouds. It is parameter ... [more ▼]

DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique to reconstruct missing data in satellite data sets, such as gaps created by the presence of clouds. It is parameter-free, meaning that no a priori information is needed (such as signal to noise ratio, or correlation length) to calculate the missing data: this information is extracted from the data through the EOF decomposition. In addition, computational time is lower than for other frequently used techniques to reconstruct missing data in satellites, such as optimal interpolation. Multivariate reconstructions can be also done, using extended EOFs. These characteristics make DINEOF very suitable for operational reconstruction of satellite data. Recently added to DINEOF is a technique to filter the temporal covariance matrix which allows to reduce spurious variability in the temporal EOFs, and therefore leads to improved reconstructions. We will present a general description of the technology, with examples of applications to different variables. We will also give an example of a near real time reconstruction of sea surface temperature in the western Mediterranean Sea. Conceived as a demonstration product for DINEOF, it is hosted at http://gher-diva.phys.ulg.ac.be/DINEOF/dineof.html and it is automatically updated daily, presenting the cloud-free sea surface temperature for the last ten days, as well as the original data, outliers and error fields. [less ▲]

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See detailRestorative detention in Belgium: policy and organizational processes
Dubois, Christophe ULg

Conference (2010, February 23)

Detailed reference viewed: 36 (3 ULg)
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See detailEffects of edaphic factors and agricultural practices on phosphorus availability
Renneson, Malorie ULg; Dufey, Joseph; Bock, Laurent ULg et al

Conference (2010, February 23)

Detailed reference viewed: 33 (7 ULg)
See detailRoxolid a new implant material
LAMBERT, France ULg; ROMPEN, Eric ULg

Conference (2010, February 23)

Detailed reference viewed: 17 (3 ULg)
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See detailParticle counting - Coulter Multisizer
Grandfils, Christian ULg

Conference (2010, February 22)

Detailed reference viewed: 15 (0 ULg)
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See detailParticle size analysis in pharmaceutical industry: specific requirements
Grandfils, Christian ULg

Conference (2010, February 22)

Detailed reference viewed: 12 (1 ULg)
Peer Reviewed
See detailIntrospection et perception interne: Brentano et l’école de Würzburg
Boccaccini, Federico ULg

Conference (2010, February 19)

Detailed reference viewed: 13 (0 ULg)
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See detailLa Forfaitarisation des Spécialités Pharmaceutiques en milieu hospitalier
Van Hees, Thierry ULg

Conference (2010, February 13)

Detailed reference viewed: 25 (6 ULg)
See detailLe rôle de l'espace frontalier dans la réconciliation belgo-allemande après 1945
Brüll, Christoph ULg

Conference (2010, February 12)

Detailed reference viewed: 28 (3 ULg)
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See detailLes outils de programmation pour les collectivités locales en Belgique
Husson, Jean-François ULg

Conference (2010, February 12)

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See detailSport et Biologie Clinique
Le Goff, Caroline ULg; Kaux, Jean-François ULg

Conference (2010, February 11)

Detailed reference viewed: 286 (15 ULg)
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See detailIntuition et description (Carnap, Schlick, Bolzano)
Dewalque, Arnaud ULg

Conference (2010, February 10)

Je voudrais tâcher de donner au problème de la référence singulière une certaine épaisseur philosophique en le resituant, au moins en un premier temps, dans un projet philosophique déterminé : celui du ... [more ▼]

Je voudrais tâcher de donner au problème de la référence singulière une certaine épaisseur philosophique en le resituant, au moins en un premier temps, dans un projet philosophique déterminé : celui du réductionnisme défendu par Carnap dans l’Aufbau (1928). L’un des enjeux d’une théorie de la référence singulière y apparaît là, me semble-t-il, dans toute sa netteté : assurer un ancrage empirique à nos théories, à travers un partage de l’indexical et du descriptif qui fait droit à l’exigence d’objectivité de la connaissance. Il en résulte un traitement différencié de l’indexical et du descriptif que l’on peut retrouver chez des auteurs comme Schlick et Bolzano, et dont l’idée directrice peut être formulée comme suit : alors que nous pouvons très bien capturer un objet singulier indexicalement, sans l’aide de descriptions concomitantes (qui seraient plutôt redondantes), nous ne pouvons utiliser cette référence objectivement, à des fins cognitives ou scientifiques, qu’au moyen de descriptions. [less ▲]

Detailed reference viewed: 25 (2 ULg)
See detailConcepts d'invidus et objets intentionnels
Leclercq, Bruno ULg

Conference (2010, February 10)

Detailed reference viewed: 14 (1 ULg)
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See detailAntibiotiques et forfaits hospitaliers
Van Hees, Thierry ULg

Conference (2010, February 09)

Detailed reference viewed: 23 (8 ULg)
See detailLa mesure de la pression artérielle
Saint-Remy, Annie ULg

Conference (2010, February 09)

Detailed reference viewed: 10 (1 ULg)
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Peer Reviewed
See detailActualités dans la mesure de la pression artérielle
Saint-Remy, Annie ULg

Conference (2010, February 09)

Intérêt et limites de l'automesure à domicile et du monitoring sur 24 heures.

Detailed reference viewed: 6 (0 ULg)
See detailEUCAST et stratégie antibiotique
MELIN, Pierrette ULg

Conference (2010, February 09)

Detailed reference viewed: 10 (1 ULg)
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See detailActualité du droit des pratiques unilatérales
Sibony, Anne-Lise ULg

Conference (2010, February 08)

Detailed reference viewed: 28 (5 ULg)
See detailNos postes de garde en Médecine Générale, pour qui ? et pourquoi ?
Burette, Philippe ULg

Conference (2010, February 07)

Detailed reference viewed: 45 (6 ULg)
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See detailAu plus bas au mieux?
Krzesinski, Jean-Marie ULg

Conference (2010, February 06)

Réunion éducative annuelle 2010 organisée par le GNFB. Sont passées en revue les principales nouveautés concernant l'hypertension artérielle,en tenant compte de la mise à jour des recommandations de la ... [more ▼]

Réunion éducative annuelle 2010 organisée par le GNFB. Sont passées en revue les principales nouveautés concernant l'hypertension artérielle,en tenant compte de la mise à jour des recommandations de la Société Européenne d'Hypertension parue en octobre 2009.L'hypertension est-elle rare chez l'enfant? Comment la diagnostiquer et la prendre en charge? Quelles sont les causes et les particularités de son traitement? A l'autre extrême, faut-il traiter l'hypertension de la personne âgée, voire très âgée et avec quel objectif? L'adage "the lower ... the better" est-il toujours d'actualité ou faut-il craindre des tensions artérielles trop basses? La courbe en J existe-t-elle et faut-il en tenir compte? Quels sont les progrès récents dans la thérapeutique? Est-il logique d'initier le traitement par une association de 2 molécules chez certains patients? Certaines associations sont-elles préférables à d'autres? Que va nous apporter l'inhibition directe de la rénine? Doit-on s'orienter vers des thérapeutiques non médicamenteuses pour juguler certains cas d'hypertension réfractaire? Enfin, que penser des mesures ambulatoires de PA mais aussi de la rigidité artérielles proposés en première ligne, dès aujourd'hui pour les unes, demain pour les autres. Ces techniques sont-elles suffisamment validées pour être intégrées à notre pratique clinique? Quelle est leur valeur ajoutée pour le patient individuel? Les appareils fournis sont-ils tous fiables? Et la télémétrie? Telles sont quelques-unes des questions auxquelles cette réunion s'efforcera de répondre, tout en laissant une large place à l'interactivité, au partage de nos expériences respectives et aux questions posées. [less ▲]

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See detailLe droit de la concurrence devant les juges : questions choisies
Sibony, Anne-Lise ULg

Conference (2010, February 05)

Detailed reference viewed: 40 (4 ULg)
See detail« Différenciation sémiologique entre les troubles de l'attention avec ou sans hyperactivité et la bipolarité dans la petite enfance »
Scholl, Jean-Marc ULg

Conference (2010, February 05)

Différenciation sémiologique entre les troubles de l'attention avec ou sans hyperactivité et la bipolarité dans la petite enfance. Le diagnostic de bipolarité reste peu connu des pédopsychiatres. Après ... [more ▼]

Différenciation sémiologique entre les troubles de l'attention avec ou sans hyperactivité et la bipolarité dans la petite enfance. Le diagnostic de bipolarité reste peu connu des pédopsychiatres. Après les premiers symptômes il faut en moyenne 10 ans et 3 à 5 médecins avant qu'un diagnostic correct ne soit posé. Notre étude, se rapportant à 170 enfants de 18 mois à 10 ans, met en évidence une sémiologie nuancée qui permet un diagnostic rapide et précoce d'un "tempérament maniaque bipolaire" comportant sept axes sémiologiques : 1. une forme "super-énergétique", 2. la clinique du sommeil, 3. un "mal-être en situation d'être seul", 4. des couleurs affectives expressives, 5. une tendance à l'excitabilité-désinhibition-appétence, 6. la prépondérance de l'attention divergente sur l'attention convergente, 7. la tendance à l'hyperactivité. Nous évoquons pour ces sept axes leur évolution développementale jusqu'à la vie adulte. La mise en évidence d'une clinique du "mal-être en situation d'être seul" est l'élément le plus original de notre recherche, il correspond à un déficit de la capacité à demeurer seul avec soi-même au calme. Ce mal-être est à distinguer de l'angoisse de séparation, même s'il peut y avoir un continuum ; il n'est pas pathognomonique de la bipolarité mais semble en faire systématiquement partie. Dans l'ADHD (déficit d'attention avec ou sans hyperactivité) on ne retrouve que les points 1, 6 et 7, par contre les points 2, 3, 4, 5 sont spécifiques de la bipolarité. Nous proposons 4 sous-groupes sémiologiques des états bipolaires et unipolaire dans l'enfance. Différentes comorbidités possibles pourront s'ajouter, ce qui apportera d'autres accentuations cliniques. Selon le temps imparti, nous pouvons également évoquer : des métaphores explicatives et thérapeutiques ; des réflexions neurophysiologiques jointes à cette sémiologie; le pronostic qui peut radicalement changer avec une prise en charge précoce. [less ▲]

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See detailLaboratoire et allergologie : nouvelles applications
Gadisseur, Romy ULg; Cavalier, Etienne ULg

Conference (2010, February 04)

Detailed reference viewed: 21 (2 ULg)
See detailLa nouvelle vague de l'entrepreneuriat social: éléments pour une analyse critique
Defourny, Jacques ULg

Conference (2010, February 04)

Detailed reference viewed: 56 (3 ULg)
See detailLe développement de l'enfant
Degraux, Christine ULg

Conference (2010, February 04)

Detailed reference viewed: 18 (8 ULg)
See detailComment penser la GRH à l’échelle d’un territoire ?
Pichault, François ULg

Conference (2010, February 04)

Detailed reference viewed: 21 (1 ULg)
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See detailLe droit romain après les Romains
Gerkens, Jean-François ULg

Conference (2010, February 02)

Detailed reference viewed: 63 (7 ULg)
Peer Reviewed
See detailUne ébauche d'analyse coûts-bénéfices d'un service civil en Belgique
Defourny, Jacques ULg; Mahiels, Gaëlle ULg

Conference (2010, February 01)

Detailed reference viewed: 33 (13 ULg)
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See detailPrinciples of TiO2 based photocatalysis
Lambert, Stéphanie ULg

Conference (2010, February 01)

Detailed reference viewed: 11 (0 ULg)
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Peer Reviewed
See detailPolitique fiscale : quelles perspectives à moyen terme?
Jousten, Alain ULg

Conference (2010, February)

Detailed reference viewed: 22 (12 ULg)
See detailRésidus de médicaments dans les eaux de rivière
Theunis, Laetitia ULg

Conference (2010, February)

Detailed reference viewed: 50 (8 ULg)
Peer Reviewed
See detailStudy of the specific lipid binding properties of Abêta 11-22 fragment at endosomal pH
Ravault, Stéphanie; Milon, Alain; Brasseur, Robert ULg et al

Conference (2010, February)

Detailed reference viewed: 6 (1 ULg)
Peer Reviewed
See detailRelease and innate detection of hot cell DNA mediates the adjuvant effects of aluminium salts on adaptive responses.
Marichal, Thomas ULg; Ohata, Keichii; Bedoret, Denis et al

Conference (2010, February)

Detailed reference viewed: 13 (0 ULg)
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See detailDCD in liver transplantation
Detry, Olivier ULg

Conference (2010, January 29)

Detailed reference viewed: 25 (2 ULg)
See detail"Gaz" de gouttes sur une surface liquide vibrée verticalement
Bronfort, Ariane ULg

Conference (2010, January 29)

Detailed reference viewed: 13 (6 ULg)
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See detailVehicle loading optimization with stochastic supply
Amand, Guillaume ULg; Arda, Yasemin ULg; Crama, Yves ULg et al

Conference (2010, January 29)

Detailed reference viewed: 21 (5 ULg)
See detailCes animaux qui déménagent
Strivay, Lucienne ULg; Mougenot, Catherine ULg

Conference (2010, January 29)

Detailed reference viewed: 37 (10 ULg)
Peer Reviewed
See detailTravailler le soi dans une société du travail sur Soi
Vrancken, Didier ULg

Conference (2010, January 28)

Detailed reference viewed: 50 (10 ULg)
See detailPrésidence
Bourgeois, Marc ULg

Conference (2010, January 28)

Detailed reference viewed: 2 (0 ULg)
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See detailA capacity game in transportation planning
Amand, Guillaume ULg; Arda, Yasemin ULg

Conference (2010, January 28)

Emerging concerns about competitiveness induce a growing number of firms to outsource their outbound transportation operations to third-party logistics providers. The resulting increase in the number of ... [more ▼]

Emerging concerns about competitiveness induce a growing number of firms to outsource their outbound transportation operations to third-party logistics providers. The resulting increase in the number of actors often leads to sub-optimal supply chain actions due to the antagonistic nature of the economic objectives of the partners. With the aim of determining possible deviations from the optimal system performance in such supply chains, this study analyzes the contractual relation between a retailer and a third-party logistics provider (carrier) using game theoretical approaches. The partners of the studied supply chain play a Stackelberg game in which the retailer is the leader and the carrier is the follower. The retailer faces an uncertain demand and needs to supply his store from his warehouse. he has the option of not meeting all the demand but must satisfy at least a minimum proportion of the fi nall demand. On the other hand, the carrier has to determine the number of trucks needed to satisfy this demand before uncertainty is resolved. Once demand is realized, if the reserved transportation capacity is insufficient, the carrier also has the possibility to requisition trucks at a higher price. We modelise the problem and propose a contract having two parameters : the quantity of transported items and the number of truck used. In our settings, the retailer is the one that submits the contract and the carrier decides if he accepts it or not. We compare this situation with a centralized model where a single decision maker takes all the decisions. [less ▲]

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See detailDouble émulsion rebondissante
Terwagne, Denis ULg; Gilet, Tristan ULg; Vandewalle, Nicolas ULg et al

Conference (2010, January 28)

Detailed reference viewed: 25 (13 ULg)
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See detailUn portail cartographique pour un échantillonnage et un diagnostic agronomique personnalisés
Genot, Valérie ULg; Colinet, Gilles ULg; Buffet, Dominique et al

Conference (2010, January 27)

Detailed reference viewed: 49 (17 ULg)
Peer Reviewed
See detailInternational Foundation for Research in Paraplegia
Martin, Didier ULg

Conference (2010, January 26)

Detailed reference viewed: 7 (2 ULg)
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See detailLe syndrome cardio-rénal
Krzesinski, Jean-Marie ULg

Conference (2010, January 26)

L’insuffisance cardiaque (IC) et celle frappant les reins (IR) constituent deux pathologies au sommet d’un iceberg, cachant un grand nombre de candidats à ces complications redoutables. Souvent, trois ... [more ▼]

L’insuffisance cardiaque (IC) et celle frappant les reins (IR) constituent deux pathologies au sommet d’un iceberg, cachant un grand nombre de candidats à ces complications redoutables. Souvent, trois facteurs de risque sont retrouvés très précocement dans l’histoire de ces patients, à savoir l’hypertension artérielle, le diabète sucré et le vieillissement. [less ▲]

Detailed reference viewed: 238 (1 ULg)
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See detailStatistical analysis of chamber VOCs emission data
Romain, Anne-Claude ULg; Degrave, Christophe; Nicolas, Jacques ULg

Conference (2010, January 21)

Detailed reference viewed: 30 (14 ULg)
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See detailRelation between emission and olfactory tests
Degrave, Christophe; Romain, Anne-Claude ULg; Nicolas, Jacques ULg

Conference (2010, January 21)

At present, sensory evaluation is not yet integrated in all labels and standards. After comparison and interpretation of the weaknesses and the strengths of the several existing methods, a methodology has ... [more ▼]

At present, sensory evaluation is not yet integrated in all labels and standards. After comparison and interpretation of the weaknesses and the strengths of the several existing methods, a methodology has been elaborated. Previous experience in off-odour measurements for environmental field investigations help us to propose a methodology based on the assessment of odour intensity and hedonic tone. Various floor covering materials were tested in the lab with a self-made instrument. The sampling procedure is based on a "Field and Laboratory Emission Cell" (FLEC). The odour of the material is compared to a 8-level butanol intensity scale generated through a vaporization chamber and 8 stainless steel capillaries distributing the diluted n-butanol to 8 sniffing ports. First results shows generally a correlation between bad hedonic tone and odour intensity. On the contrary, there are no systematic relations between VOC levels and odour perception. The less odorous materials (PVC) are also the ones with the higher level of total VOC and the linoleum had a strong odour with a low level of total VOC. The explanation lies in the chemical family composition of the emission. The PVC emission contains mainly alkanes compounds (non odorous family) whereas the linoleum contains also odorous chemical families like carboxylic acids and aldehydes. [less ▲]

Detailed reference viewed: 75 (14 ULg)
See detailSurgical and Prosthodontic considerations for the Bone Level Implant
LAMBERT, France ULg

Conference (2010, January 21)

Detailed reference viewed: 6 (0 ULg)
See detailUn contexte normatif dans les Recherches philosophiques de Wittgenstein
Gauvry, Charlotte ULg

Conference (2010, January 16)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailFootball et tensions communautaires en Belgique
Fincoeur, Bertrand ULg

Conference (2010, January 15)

Detailed reference viewed: 10 (0 ULg)
See detailObject existence and presence a core issue in spatio-temporal modelling
Hallot, Pierre ULg

Conference (2010, January 14)

Detailed reference viewed: 38 (2 ULg)
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See detailImitation et prise de position. À propos de quelques collectifs fumistes
Saint-Amand, Denis ULg

Conference (2010, January 14)

Detailed reference viewed: 9 (1 ULg)
See detailThe ecology of Lake Kivu: a puzzle solved?
Darchambeau, François ULg; Sarmento, Hugo; Isumbisho, Mwapu et al

Conference (2010, January 14)

Detailed reference viewed: 6 (1 ULg)
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See detailTEST AND EVALUATION OF TWO PROCESS CONTROL STRATEGIES FOR ADAPTING DIRECT INJECTION PESTICIDE APPLICATION TO SMALL SCALE FARMS
El Aissaoui, Abdellah ULg; Lebeau, Frédéric ULg; Destain, Marie-France ULg et al

Conference (2010, January 13)

Small scale farmers, in developing and in some developed countries, are faced to actual difficulties of applying pesticides accurately and safely on vegetables crops. They mainly use hand operated ... [more ▼]

Small scale farmers, in developing and in some developed countries, are faced to actual difficulties of applying pesticides accurately and safely on vegetables crops. They mainly use hand operated sprayers. As an issue, a small direct injection system based on a five meter's parallel boom layout was designed to improve chemical application. The boom layout was optimised to obtain the same minimal lag time response for the ten nozzles. The dynamic of the system was modelled using SimulinkTM as first order model with delay. Two control strategies were implemented using PID feedback control loops to monitor tracer injection (fluorescing) proportionally to simulated forward speed (from 0.6 to 1.2 m/s) and to control the constant operating pressure (constant carrier flow strategy) or the variable operating pressure proportionally to the injected chemical amount (variable total flow strategy). Different forward speed changes were induced using steps up and down, ramps, sine waves and sweeps solicitations to evaluate the control feedback. The system stability was tested for its ability to maintain the expected concentration and application rate. The results show that the lag time remains less than 3 s (dead time < 2s , time constant < 1s) and the system keeps stable for the maximal speed variation and acceleration tested (∆V=200%, a= 0.48 m/s2) which induce less than 10% variation of application rate. [less ▲]

Detailed reference viewed: 94 (3 ULg)
See detailQuelle quantité minimale de tissu rénal nécessaire?
Krzesinski, Jean-Marie ULg

Conference (2010, January 11)

Detailed reference viewed: 2 (0 ULg)
See detailAnalysis of mortality and morbidity data
Brichant, Jean-François ULg

Conference (2010, January 08)

Detailed reference viewed: 4 (0 ULg)
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See detailLaboratoire et allergologie : nouvelles applications
Gadisseur, Romy ULg; Cavalier, Etienne ULg

Conference (2010, January 07)

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Peer Reviewed
See detailMulti-scale modelling of sediment transport
Dewals, Benjamin ULg

Conference (2010, January 07)

Detailed reference viewed: 23 (2 ULg)
See detailTélémédecine en Néphrologie
Krzesinski, Jean-Marie ULg

Conference (2010, January 05)

Detailed reference viewed: 12 (0 ULg)
See detailAuroral processes at the outer planets
Gérard, Jean-Claude ULg

Conference (2010, January 04)

The mean electron energy may be significantly different in different auroral zones. The Io tail CR is remarkably low in comparison with the high-latitude aurora and independent of its brightness (<E> ~ 50 ... [more ▼]

The mean electron energy may be significantly different in different auroral zones. The Io tail CR is remarkably low in comparison with the high-latitude aurora and independent of its brightness (<E> ~ 50 keV or less). This is consistent with a model where the tail corresponds to an upward field aligned current closing the magnetospheric circuit in Jupiter’s ionosphere. The CR in the main oval is associated with electron energies from ~50 to several 100 keV. It is statistically positively correlated with the intensity. Brightness increase in the main oval is accompanied by hardening of the electron energy spectrum. This result is consistent with acceleration by potential drops accompanying upward field-aligned currents which carry a nearly constant particle number flux. The electron mean energy is also variable in the polar spots but it is not correlated with the main oval brightness nor its own intensity, suggesting different, uncorrelated mechanisms. Polar brightenings (duration ~ 50-100 sec, rise time ~30 sec) have been observed. They are not necessarily associated with an increase of the mean electron energy. The mean electron energy can even decrease during the intensification. No correlation is observed between changes in main oval and high latitude (polar cap) features. [less ▲]

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See detailPolitique fiscale: Quelles perspectives?
Jousten, Alain ULg

Conference (2010, January)

Detailed reference viewed: 12 (7 ULg)
See detailLe developpement des methodes de lutte biologique en agriculture et horticulture
Jijakli, Haissam ULg

Conference (2010, January)

Detailed reference viewed: 21 (2 ULg)
See detailPenser le nationalisme
Nachi, Mohamed ULg

Conference (2010, January)

Le nationalisme arabe, ses origines, son développement et son déclin

Detailed reference viewed: 2 (1 ULg)
See detailLa lutte biologique et les terrains de sport et des espaces verts
Jijakli, Haissam ULg

Conference (2010, January)

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See detailWheat yield and PAI decreasing shape curve
Kouadio, Amani Louis ULg; Tychon, Bernard ULg

Conference (2010, January)

Estimation of cereal-crop production is considered as a priority in most crop research programmes due to the relevance of food grain to world agricultural production. Today, a large number of ... [more ▼]

Estimation of cereal-crop production is considered as a priority in most crop research programmes due to the relevance of food grain to world agricultural production. Today, a large number of agrometeorological models for crop yield assessment are available with various levels of complexity and empiricism. A preliminary study was performed with simulated data of wheat yield and LAI derived from the WOFOST/CGMS agrometeorological model. The main hypothesis underlying this study is that it’s possible to improve wheat yield estimates from metrics stretched from LAI decreasing curves. This preliminary study showed that wheat yield can be estimated by metrics stretched from simulated LAI curve-fitting done by a modified Gompertz function [G =A*exp (-exp(-k(t-m)))] and a logistic function [G = A / 1+exp(-k(t-m)); where G is the green LAI (gLAI), A the initial percentage of LAI, m the position of the inflexion point in the decreasing part of the LAI curve and k the relative senescence rate. In 2009 a large field campaign in the Grand-Duchy of Luxembourg and France was done to check the validity of such approach with field data. Hemispheric images were taken on 18 winter wheat fields during the crop cycle, preferentially from inflorescence emergence to maturity. The variable of interest, green PAI (Plant Area Index), was retrieved after analyses of images by the CAN-EYE software (v. 6.1). Data used as input to establish the model of wheat yield estimate are the value of observed PAImax, and metrics k and m, stretched from observed PAI curves fitted by Gompertz and logistic functions. The model obtained by multilinear regression with these variables reveals that wheat yield can be estimated, at the scale of the plot, with a r² ≈ 0.70 and a RMSE = 0.87 t/ha (RRMSE = 9%). The validation of such approach at the scale of an agricultural zone or region will be performed in the next step of our study, by using remote sensing data (air temperature, PAI or LAI) and phenology data as input. Such simple models may be considered as a first yield estimates that may be completed, if justified, by other agrometeorological models in order to provide a better integrated yield assessment. [less ▲]

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See detailTNFL–Induced p100 processing (TIPP) relies on the internalization of the cognate TNFR
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Conference (2010, January)

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Peer Reviewed
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Stienon, Valérie ULg

Conference (2010, January)

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FINCK, Camille ULg

Conference (2010, January)

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QUATRESOOZ, Pascale ULg

Conference (2010)

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See detailMorphemes in the mind: Are there graded effects of semantic similarity on morphological processing in children?
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Conference (2010)

Detailed reference viewed: 15 (0 ULg)
See detailExtinction debt and colonization credit: When both phenomena are integrated
Piqueray, Julien ULg; Cristofoli, Sara; Bisteau, Emmanuelle et al

Conference (2010)

Calcareous grasslands are among the most species-rich ecosystems in temperate countries. These ecosystems suffered a high fragmentation process during the last century. Fragmentation can lead to the ... [more ▼]

Calcareous grasslands are among the most species-rich ecosystems in temperate countries. These ecosystems suffered a high fragmentation process during the last century. Fragmentation can lead to the creation of an extinction debt in remaining habitat patches. In our study site, it was shown in a previous study that Fragmented habitat patches (area loss since 1965 >80%) exhibited an extinction debt in comparison to Stable habitat patches (area loss since 1965 <80%). However, human activities also created new habitat patches in the landscape and provided therefore opportunities for calcareous grassland plant species to colonize new sites. They also provide opportunities for studying species colonization abilities in the context of habitat restoration. We analyzed species richness in these new patches in comparison to old patches in order to detect colonization credit. When taking as reference Fragmented patches (that exhibit an extinction debt) or all old patches (Fragmented and Stable), we concluded to the occurrence of a colonization credit in New patches. However, when the reference is Stable patches (the less likely to exhibit an extinction debt) alone, no colonization credit could be detected. Moreover, correspondence analysis revealed that New patches were similar to old patches in term of species composition. These results are encouraging for restoration programs. They also showed that the presence of an extinction debt in reference habitats can lead to mistaken conclusion in restoration monitoring. Extinction debt occurrence should be taken into account in the choice of reference habitats for evaluation of restoration success. [less ▲]

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