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See detailDescription du terrain silurien du centre de la Belgique
Malaise, Constantin ULg

in Mémoires Couronnés et Mémoires des Savants Etrangers (1873), XXVII

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See detailDescription et analyse d'un modèle de respiration hétérotrophe appliqué à un sol agricole.
Buysse, Pauline ULg

Master's dissertation (2008)

This work aimed to describe a mechanistic model for soil heterotrophic respiration, to apply it to an agricultural soil and to specify its important parameters, in order to define future research fields ... [more ▼]

This work aimed to describe a mechanistic model for soil heterotrophic respiration, to apply it to an agricultural soil and to specify its important parameters, in order to define future research fields. A complete description of the model structure is given. It uses a daily time step and is derived from the CENTURY model. The model was found to be independent from the initial carbon pool contents and an exponential relationship was observed between the order of stabilisation of the different pools and their respective decomposition constants. Literature was scanned to provide a panel of biochemical parameter values (nitrogen, lignin, cellulose and hemicellulose contents) for wheat, sugar beet and potato crops. Large parameter ranges of values were noticed and a lack of information about sugar beet and potato crops drove our choice to work with wheat biochemical parameters later on. An exponential relationship between two parameters linked to the effect of temperature on microbial respiratory activity, respectively Tb and h, was highlighted. For a fixed value of Q10, the values of these two parameters varied in opposite ways. The sensitivity analysis was performed at both short and long terms, mainly on the basis of carbon pool contents. The results were very variable from one pool to another. In both analyses Tb and h appeared to be the most sensitive parameters while some differences between both time spans were noticed, notably because of pool stabilisation dynamics and crop residue types. In the end, the combination of sensitivity values with parameter ranges of values brought us to consider the parameters Tb, h, Nlit (% nitrogen in above-ground residues) and Lignlit (% lignin in above-ground residues) and the forcing variables MBR (root residues quantity) and Litfall (above-ground residues quantity) as the features about which further investigations would be needed. The integration of this mechanistic model into a more complete one, also taking account of autotrophic respiration and CO2 diffusion in soils, is a further goal to achieve. [less ▲]

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See detailDescription et commentaire de deux approches méthodologiques de la vidéo-évaluation des stages pratiques en didactique des langues germaniques à l'ULg (I)
Simons, Germain ULg

in Education-Formation (1997), (246), 43-49

La première partie de cet article (voir commentaire ci-dessous) porte sur la présentation et l'analyse d'un atelier de vidéo-évaluation des stages d'enseignement que nous proposons aux étudiants de l ... [more ▼]

La première partie de cet article (voir commentaire ci-dessous) porte sur la présentation et l'analyse d'un atelier de vidéo-évaluation des stages d'enseignement que nous proposons aux étudiants de l'Agrégation de l'Enseignement Secondaire Supérieur (AESS) en Langues et littératures germaniques à l'ULg. L'approche "confidentielle" de la vidéo-évaluation est une forme d'AUTOscopie qui repose sur cinq grandes étapes : 1. l'étudiant-stagiaire (E-S) est filmé pendant une leçon qu'il donne dans le cadre de ses stages ; 2. l'E-S exprime son ressenti par rapport à la leçon donnée (auto-évaluation "à chaud") puis visionne la vidéo (évaluation "à froid") ; 3. l'E-S est invité à identifier les différences entre son évaluation "à chaud" et "à froid" ; 4. le formateur complète cette auto-évaluation par son analyse de la leçon filmée ; 5. l'E-S. identifie les axes prioritaires sur lesquels il travaillera dans les stages suivants et le formateur fournit quelques pistes pour faciliter ce transfert dans la pratique. Les principaux avantages et inconvénients de cette approche de l'autoscopie sont abordés dans la conclusion provisoire de cet article. [less ▲]

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See detailDescription et commentaire de deux approches méthodologiques de la vidéo-évaluation des stages pratiques en didactique des langues germaniques à l'ULg (II)
Simons, Germain ULg

in Education-Formation (1997), (247), 1-8

Dans cette deuxième partie (voir commentaire ci-dessous), nous décrivons une approche particulière de l'HETEROscopie de la pratique enseignante. Outre le formateur, cet atelier d'évaluation assistée par ... [more ▼]

Dans cette deuxième partie (voir commentaire ci-dessous), nous décrivons une approche particulière de l'HETEROscopie de la pratique enseignante. Outre le formateur, cet atelier d'évaluation assistée par la vidéo regroupe seize personnes : deux enseignants-stagiaires (E-S) qui ont accepté d'être filmés dans le cadre de leurs stages, leurs deux maîtres de stages, et douze E-S. Ces derniers sont amenés à observer, à analyser, à évaluer, sous différents angles, les leçons données par leurs deux collègues. Les deux E-S qui ont été filmés contextualisent le montage-vidéo (max. 20') de leur leçon et précisent les objectifs qu'ils poursuivaient. Les douze E-S sont répartis en quatre groupes de trois. Chaque groupe reçoit la grille d'évaluation utilisée dans le cadre des stages et choisit un foyer d'évaluation spécifique. A l'intérieur des quatre groupes, chaque étudiant a la responsabilité d'un sous-foyer d'évaluation particulier. Une synthèse de l'évaluation est ensuite proposée par un rapporteur de chaque groupe. Pour la deuxième leçon, les trois groupes changent de foyer d'évaluation. Des suggestions prioritaires sont finalement formulées par le formateur, les maîtres de stages et, éventuellement, les collègues E-E. L'article se clôture en examinant l'intégration de ces deux ateliers de vidéo-évaluation (voir commentaire ci-dessous) dans la macro-structure méthodologique de la formation initiale en didactique des langues germaniques à l'ULg. [less ▲]

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See detailDescription et interprétation stratigraphique de quatre sondages dans le Secondaire de la Gaume (Neulimont, Aubange, Saint-Mard et Toernich)
Boulvain, Frédéric ULg; Delsate, D.; Maubeuge, P. L.

in Professional Paper Belgian Geological Survey (1995), 277

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See detailDescription et modélisation de la croissance et du développement du pommier (Malus x domestica Borkh.) : I. Structure la plus probable de l'arbre jeune
Planchon, Viviane; Claustriaux, Jean-Jacques ULg; Crabbé, Jacques

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2003), 7(1), 37-49

Growth and development of young apple trees are described and modeled from four years of observations.

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See detailDescription et modélisation de la croissance et du développement du pommier (Malus x domestica Borkh.) : II. Caractéristiques et distribution spatiale et temporelle des sites de floraison.
Planchon, Viviane; Claustriaux, Jean-Jacques ULg; Crabbé, Jacques

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2003), 7(2), 99-110

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See detailDescription et olfaction de l’art contemporain : les mutations de la critique d’art
Wicky, Erika ULg; Bouchard, Karine

in Marges : Revue d'art contemporain (2014)

Currently, the art criticism encounters changes that come from the transformation of its objects and of its broadcast mediums in the digital age. To understand these changes and to evaluate the issues, we ... [more ▼]

Currently, the art criticism encounters changes that come from the transformation of its objects and of its broadcast mediums in the digital age. To understand these changes and to evaluate the issues, we will examine the art criticism through the lense of olfactory art to show how this very specific art brings out the subjectivity, the perceptual habitus as well as the scientific and industrial limits of the art criticism. [less ▲]

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See detailDescription lithostratigraphique et pétrographie du sondage 221E87 de Villers-devant-Orval (Trias, Lias de la Gaume, Belgique)
Boulvain, Frédéric ULg; Delsate, D.; Gulinck, M. et al

in Professional Paper Belgian Geological Survey (1996), 281

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See detailDescription of a Lightweight Bartering Grid Architecture
Briquet, Cyril ULg; de Marneffe, Pierre-Arnoul ULg

in Bubak, Marian; Turala, Michal; Wiatr, Kazimierz (Eds.) CGW'06 Proceedings (2006, October 18)

Automated resource exchange and negotiation between participants of a Virtual Organization, or Peers of a Peer-to-Peer Grid, is an important feature of Grid computing because it enables scalable ... [more ▼]

Automated resource exchange and negotiation between participants of a Virtual Organization, or Peers of a Peer-to-Peer Grid, is an important feature of Grid computing because it enables scalable cooperation between entities under separate administrative control. Automated negotiation and accounting of resource consumption have been studied, and market-based resource exchange methods have been proposed. However, there currently exist few simulators of resource exchange accounting or actual Grid middlewares supporting negotiation with automated resource usage accounting between separate entities. We propose a Lightweight Bartering Grid (LBG) architecture suitable to the development of Peer-to-Peer Grids based on bartering (i.e. automated and accounted resource exchange), where Peers model their environment. We present the LBG architecture as well as a simulator and a middleware under development that both instantiate it. [less ▲]

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See detailDescription of a Modelica-based thermal building model integrating multi-zone airflows calculation
Ransy, Frédéric ULg; Gendebien, Samuel ULg; Lemort, Vincent ULg

Conference (2016, May 23)

Nowadays, in newly built housings, energy losses due to the ventilation can represent up to 50 % of the total building energy consumption. As a result, heat recovery ventilation units are widely used in ... [more ▼]

Nowadays, in newly built housings, energy losses due to the ventilation can represent up to 50 % of the total building energy consumption. As a result, heat recovery ventilation units are widely used in order to save primary energy and different control strategies for ventilation systems are investigated. For instance, demand control ventilation sounds like a promising solution to decrease the energy impact of the ventilation system in the residential sector. An accurate building model integrating the influence of ventilation (so called thermo-aeraulic building model) is necessary in order to investigate the control and the impact of the ventilation system on a yearly basis. The aim of the present paper consists in a description of a combined multi-zone airflow network model and thermal building model implemented in the Modelica language. The thermal model is a simplified dynamic model using equivalent thermal resistance and capacity. The airflow network is based on the traditional electrical circuit analogy. The model can be used for ventilation systems design, infiltration rate calculation, inside air quality calculation, energy consumption calculation, etc. The first part of the paper details the multi-zone thermal building model. The results obtained from the model are compared to experimental in situ results collected in the typical single family house test facilities. Those experimental results have been obtained in the frame of the IEA-EBC Annex 58. The second part of the paper introduces the multi-zone airflow network building model. Obtained model results are compared with the results provided by a typical multizone airflow analysis software, for a simple three zones test case. The third part of the paper describes the coupling between both thermal and airflow models. The different numerical problems encountered are described and solutions are discussed. [less ▲]

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See detailDescription of a new procedure to estimate the carbon stocks of all forest pools and impact assessment of methodological choices on the estimates
Latte, Nicolas ULg; Colinet, Gilles ULg; Fayolle, Adeline ULg et al

in European Journal of Forest Research (2013), 132

Forest ecosystems play a major role in atmospheric carbon sequestration and emission. Comparable organic carbon stock estimates at temporal and spatial scales for all forest pools are needed for ... [more ▼]

Forest ecosystems play a major role in atmospheric carbon sequestration and emission. Comparable organic carbon stock estimates at temporal and spatial scales for all forest pools are needed for scientific investigations and political purposes. Therefore, we developed a new carbon stock (CS) estimation procedure that combines forest inventory and soil and litter geodatabases at a regional scale (southern Belgium). This procedure can be implemented in other regions and countries on condition that available external carbon soil and litter data can be linked to forest inventory plots. The presented procedure includes a specific CS estimation method for each of the following forest pools and subpools (in brackets): living biomass (aboveground and belowground), deadwood (dead trees and snags, coarse woody debris and stumps), litter, and soil. The total CS of the forest was estimated at 86 Tg (185 Mg ha-1). Soil up to 0.2 m depth, living biomass, litter, and deadwood CSs account, respectively, for 48, 47, 4, and 1 % of the total CS. The analysis of the CS variation within the pools across ecoregions and forest types revealed in particular that: (1) the living biomass CS of broadleaved forests exceeds that of coniferous forests, (2) the soil and litter CSs of coniferous forest exceed those of broadleaved forests, and (3) beech stands come at the top in carbon stocking capacity. Because our estimates differ sometimes significantly from the previous studies, we compared different methods and their impacts on the estimates. We demonstrated that estimates may vary highly, from -16 to ?12 %, depending on the selected methods. Methodological choices are thus essential especially for estimating CO2 fluxes by the stock change approach. The sources of error and the accuracy of the estimates were discussed extensively. [less ▲]

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See detailThe description of a new species reveals underestimated diversity in the lichen genus Bulbothrix (Parmeliaceae) in Africa
Masson, Didier; Benatti, Michel; Sérusiaux, Emmanuël ULg

in Lichenologist (2015), 47

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See detailDescription of a new species, Bifidobacterium crudilactis sp. nov., isolated from raw milk and raw milk cheeses.
Delcenserie, Véronique ULg; Gavini, Françoise; Beerens, Henri et al

in Systematic & Applied Microbiology (2007), 30(5), 381-9

A new Bifidobacterium species is described based on the study of ten Gram-positive strains with fructose-6-phosphate phosphoketolase activity. They are part of a phenotypic group comprising 141 strains ... [more ▼]

A new Bifidobacterium species is described based on the study of ten Gram-positive strains with fructose-6-phosphate phosphoketolase activity. They are part of a phenotypic group comprising 141 strains isolated from raw milk and raw milk cheeses in French raw milk cheese factories. This group was separated by a numerical analysis based on API 50CH, API 32A tests and growth at 46 degrees C. A strong similarity of 16S rRNA sequences (99.8%) was shown between strain FR62/b/3(T) and Bifidobacterium psychraerophilum LMG 21775(T). However, low DNA-DNA relatedness was observed between their DNAs (31%). The new isolates are able to grow at low temperatures (all ten strains up to 5 degrees C) and strain FR62/b/3(T) grows under aerobic conditions, as does B. psychraerophilum. However, contrary to B. psychraerophilum, they do not ferment L-arabinose, D-xylose, arbutin or melezitose, but they do acidify lactose. The DNA G+C content of FR62/b/3(T) is 56.4mol%. Therefore, the name Bifidobacterium crudilactis sp. nov. is proposed, with its type strain being FR62/b/3(T) (=LMG 23609(T)=CNCM I-3342(T)). [less ▲]

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See detailDescription of a standardized rehabilitation program based on sub-maximal eccentric following a platelet-rich plasma infiltration for jumper’s knee.
Kaux, Jean-François ULg; Forthomme, Bénédicte ULg; NAMUROIS, Marie-Hélène ULg et al

in Muscles, Ligaments and Tendons Journal (2014), 4(1 (eCollection 2014 Jan)), 85-89

Introduction: Different series emphasized the necessity of rehabilitation program after infiltration of platelet-rich plasma (PRP) in case of tendinopathy. However, most of them describe only briefly the ... [more ▼]

Introduction: Different series emphasized the necessity of rehabilitation program after infiltration of platelet-rich plasma (PRP) in case of tendinopathy. However, most of them describe only briefly the reeducation protocol and these programs vary. Our aim was to extensively describe a specific standardized rehabilitation program. Methods: After a review of literature of post-PRP infiltration protocols, we had developed a standardized rehabilitation protocol. This protocol was evaluated by 30 subjects with chronic jumper’s knee who. A a standardised progressive sub-maximal eccentric program supervised by a physical therapist for 6 weeks was started 1 week post-infiltration. The patient benefited also from electromyostimulation, isometric strengthening and stretching of the quadriceps, cycloergometer and cryotherapy. After the supervised program, the patient had to make an auto-reeducation added to the reathletisation protocol for 6 more weeks which was followed by maintenance exercises up to 1 year. The assessments were made using a VAS, IKDC and VISA-P scores. Results: The VAS , IKDC and VISA-P scores decreased very significantly with time. The compliance to auto-reeducation was good. Conclusion: We proposed a simple and efficient protocol based on sub-maximal eccentric reeducation to add to PRP infiltrations in case of patellar tendinopathy. [less ▲]

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See detailDescription of a ‘soft tissue friendly’ protocol for immediate loading in the esthetic zone: 1 year result of 13 consecutive patients
COMPEYRON, Yoann ULg; LECLOUX, Geoffrey ULg; ROMPEN, Eric ULg et al

Poster (2012, June)

Objectives: Repeted abutment connection and disconnections compromize the connective and epithelial sealing around implant components, leading to peri-implant bone remodeling (Abrahamsson, 1997). Placing ... [more ▼]

Objectives: Repeted abutment connection and disconnections compromize the connective and epithelial sealing around implant components, leading to peri-implant bone remodeling (Abrahamsson, 1997). Placing the definitive abutment at the time of implant placement might be a treatment option to minimize this biological rupture. The aim of this study was to evaluate the effectiveness of pre-shaped zirconium abutments for immediate implant loading in the anterior maxilla. Materials and methods: A total of 13 patients needing the placement of one or several implant in the esthetic zone were treated with Regular Crossfit Bone Level (Straumann) implants. Implants were placed and immediately restored with a pre-shaped zirconium abutments and provisional resin crowns if the primary stability reached at least 20 N/cm2. Implant survival rate, biological and prosthodontic complications as well as peri-implant tissue status (papilla index) were recorded during a follow-up period of 1 year. Results: A total of 14 implants (8 incisors, 1 canines, 5 premolars) placed in 11 patients (4 men / 7 women) aged from 22 to 60 years old (48,5 +/- 11,5) could be assessed for the entire follow-up period. 2 patients dropped out. All implants reached an adequate primary stability (> 20N/cm2) to perform an immediate implant restoration. Straight pre-shaped Zirconium abutment was used in each case. Six implants were placed in socket preservation sites and five implants were placed simultaneously with a GBR. After a follow-up period of 1 year, all implants fulfilled survival criteria for dental implants with regard to osteointegration, including the absence of peri-implant radiolucency, implant mobility, suppuration, and pain. One abutment screw loosening was observed during the provisional period and no abutment fracture occurred. Definitive full ceramic-cemented restorations were successfully performed on each implant after a mean period of 6 months and no further complications occurred. In 11 out of 14 implants, an improvement of the papilla index was observed from baseline to 1 year follow-up whereas 3 implants showed a decrease of this index. Conclusion: The results from this prospective case series suggest that immediately restored implants using a final pre-shaped zirconium abutment in esthetic zone display favorable implant and prosthodontic outcomes and seems to allow an adequate papilla index improvement in most of the cases. [less ▲]

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See detailDescription of cropland CO2 exchange : a comparison of empirical and physiologically based estimates of Reco, GPP and NEE
Tenhunen, J.; Li, Y.-L.; Dinh, N. Q. et al

in CarboEurope-IP meeting 2008 (2008)

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See detailDescription of diffractive optical elements with self-Fourier transform functions
Stijns, Erik; Roose, Stéphane ULg

in Nowak, J.; Zajac, M. (Eds.) Proceedigs of International colloqium on non-conventional optical imaging elements NOIE'93 (1993)

In (synthetic) holography and diffractive optics, the optical field is often decomposed in a set of spherical or plane waves. This gives sometimes some problems in calculating the Fourier transform ... [more ▼]

In (synthetic) holography and diffractive optics, the optical field is often decomposed in a set of spherical or plane waves. This gives sometimes some problems in calculating the Fourier transform. Because Gaussian beams are their own Fourier transform, it seems to be more natural to use Gaussian beams as basis functions. However, because Gaussian functions are no complete set of basis functions, it is necessary to extend the idea and to use rather Gaussian-Hermite wave functions as an orthonormal basis set. Those ideas can also be applied to general Self-Fourier Transform functions. [less ▲]

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