Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailDroit et philosophie du langage ordinaire
Pieret, Denis ULg

in Dissensus (2009), 3

Detailed reference viewed: 27 (1 ULg)
Full Text
Peer Reviewed
See detailAnthropologie et migrations africaines : une généalogie des recherches
Kuczynski; Razy, Elodie ULg

in Revue Européenne des Migrations Internationales (2009), 25(3), 79-100

Detailed reference viewed: 82 (17 ULg)
Full Text
Peer Reviewed
See detailInsuline detemir (Levemir) dans l'etude predictive: resultats obtenus chez les patients diabetiques de type 1 de la cohorte belge.
Philips, Jean-Christophe ULg; Scheen, André ULg

in Revue Médicale de Liège (2009), 64(3), 124-30

Insulin detemir (Levemir) is a soluble human insulin analogue acylated with a 14-carbon fatty acid, which reversibly binds to albumin, thereby providing a more prolonged metabolic effect with lower ... [more ▼]

Insulin detemir (Levemir) is a soluble human insulin analogue acylated with a 14-carbon fatty acid, which reversibly binds to albumin, thereby providing a more prolonged metabolic effect with lower variability as compared to NPH insulin taken as reference. Thanks to this pharmacokinetic and pharmacodynamic profile, insulin detemir is essentially used within a basal-bolus regimen. We report the results obtained in 232 type 1 diabetic patients recruited in Belgium in the frame of the international observational, open, prospective PREDICTIVE study. In patients initially treated with either NPH insulin or glargine, followed for 26 weeks, the shift to insulin detemir did not change HbA1c levels, but significantly reduced both the mean and the variability of fasting blood glucose levels while diminishing the risk of hypoglycaemic episodes, especially at night. Therefore, insulin detemir was associated with significantly improved quality of life. These changes were obtained with a slight increase in daily insulin doses but without weight gain. [less ▲]

Detailed reference viewed: 134 (1 ULg)
Full Text
Peer Reviewed
See detailEnhancing temporal correlations in EOF expansions for the reconstruction of missing data using DINEOF
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Sirjacobs, Damien ULg et al

in Ocean Science (2009), 5(4), 475-485

DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique for the reconstruction of missing data in geophysical fields, such as those produced by clouds in sea surface ... [more ▼]

DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique for the reconstruction of missing data in geophysical fields, such as those produced by clouds in sea surface temperature satellite images. A technique to reduce spurious time variability in DINEOF reconstructions is presented. The reconstruction of these images within a long time series using DINEOF can lead to large discontinuities in the reconstruction. Filtering the temporal covariance matrix allows to reduce this spurious variability and therefore more realistic reconstructions are obtained. The approach is tested in a three years sea surface temperature data set over the Black Sea. The effect of the filter in the temporal EOFs is presented, as well as some examples of the improvement achieved with the filtering in the SST reconstruction, both compared to the DINEOF approach without filtering. [less ▲]

Detailed reference viewed: 305 (28 ULg)
Full Text
Peer Reviewed
See detailAppropriate myocardial revascularization: a joint viewpoint from an interventional cardiologist and a cardiac surgeon.
Wijns, William; Kolh, Philippe ULg

in European Heart Journal (2009), 30(18), 2182-5

Detailed reference viewed: 15 (2 ULg)
Full Text
Peer Reviewed
See detailNumerical modelling of timber connections under fire loading using a component model
Cachim, Paulo B.; Franssen, Jean-Marc ULg

in Fire Safety Journal (2009), 44

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The ... [more ▼]

This paper describes a component model for dowelled timber connections under fire loading. The component model of the dowelled connection is first developed and calibrated for room temperature. The constitutive relations for dowel–timber interaction are detailed and compared with experimental results. In the fire situation, a two-step approach is used: first, three-dimensional (3D) thermal analysis of the connection is performed using a conductive model with timber properties defined in Eurocode 5 in order to calculate the temperatures in the fasteners and timber; afterwards, the mechanical analysis using a component model is carried out using mechanical properties of the steel dowel and of timber adjusted to the temperatures obtained by the thermal analyses. These properties are reduced according to Eurocode 3 and Eurocode 5, respectively. Numerical simulations are presented that allow evaluation of the model behaviour and performance. Obtained results show good agreement with available experimental data, indicating that regardless of its simplicity, the component model has the capability to accurately model timber connections under fire loading [less ▲]

Detailed reference viewed: 120 (3 ULg)
Full Text
Peer Reviewed
See detailReinforcement learning versus model predictive control: a comparison on a power system problem
Ernst, Damien ULg; Glavic, Mevludin; Capitanescu, Florin ULg et al

in IEEE Transactions on Systems, Man & Cybernetics : Part B (2009), 33(2), 517-519

This paper compares reinforcement learning (RL) with model predictive control (MPC) in a unified framework and reports experimental results of their application to the synthesis of a controller for a ... [more ▼]

This paper compares reinforcement learning (RL) with model predictive control (MPC) in a unified framework and reports experimental results of their application to the synthesis of a controller for a nonlinear and deterministic electrical power oscillations damping problem. Both families of methods are based on the formulation of the control problem as a discrete-time optimal control problem. The considered MPC approach exploits an analytical model of the system dynamics and cost function and computes open-loop policies by applying an interior-point solver to a minimization problem in which the system dynamics are represented by equality constraints. The considered RL approach infers in a model-free way closed-loop policies from a set of system trajectories and instantaneous cost values by solving a sequence of batch-mode supervised learning problems. The results obtained provide insight into the pros and cons of the two approaches and show that RL may certainly be competitive with MPC even in contexts where a good deterministic system model is available. [less ▲]

Detailed reference viewed: 128 (14 ULg)
Full Text
See detailL-band and C-band studies of African volcanic areas
Wauthier, Christelle ULg; Oyen, A.; Marinkovic, P. et al

in Proc. of Geoscience and Remote Sensing Symposium, 2009 IEEE International, IGARSS 2009 , July 13-17 2009, Cape Town, Africa (2009)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailLes prix littéraires : construire la littérature, soulager le public
Spinoy, Erik ULg

Article for general public (2009)

Literary prizes are an increasingly important tool for the construction of literature, in an era where more traditional literary institutions are subject to erosion. In contributing to constructing ... [more ▼]

Literary prizes are an increasingly important tool for the construction of literature, in an era where more traditional literary institutions are subject to erosion. In contributing to constructing literature, they relieve the public of the anxiety it feels when it is confronted with the pluriformity of the literary 'Real', by choosing 'for it'. [less ▲]

Detailed reference viewed: 51 (9 ULg)
Full Text
Peer Reviewed
See detailContribution of a Dense Population of the Brittle Star Acrocnida brachiata (Montagu) to the Biogeochemical Fluxes of CO2 in a Temperate Coastal Ecosystem
Davoult, D.; Harlay, Jérôme ULg; Gentil, F.

in Estuaries and Coasts (2009), 32(6), 1103-1110

The production of organic matter and calcium carbonate by a dense population of the brittle star Acrocnida brachiata (Echinodermata) was calculated using demographic structure, population density, and ... [more ▼]

The production of organic matter and calcium carbonate by a dense population of the brittle star Acrocnida brachiata (Echinodermata) was calculated using demographic structure, population density, and relations between the size (disk diameter) and the ash-free dry weight (AFDW) or the calcimass. During a 2-year survey in the Bay of Seine (Eastern English Channel, France), organic production varied from 29 to 50 g(AFDW) m(-2) year(-1) and CaCO3 production from 69 to 104 g(CaCO3) m(-2) year(-1). Respiration was estimated between 1.7 and 2.0 mol(CO2) m(-2) year(-1). Using the molar ratio (psi) of CO2 released: CaCO3 precipitated, this biogenic precipitation of calcium carbonate would result in an additional release between 0.5 and 0.7 mol(CO2) m(-2) year(-1) that represented 23% and 26% of total CO2 fluxes (sum of calcification and respiration). The results of the present study suggest that calcification in temperate shallow environments should be considered as a significant source of CO2 to seawater and thus a potential source of CO2 to the atmosphere, emphasizing the important role of the biomineralization (estimated here) and dissolution (endoskeletons of dead individuals) in the carbon budget of temperate coastal ecosystems. [less ▲]

Detailed reference viewed: 23 (3 ULg)
Full Text
Peer Reviewed
See detailOrganic surface coating on Coccolithophores - Emiliania huxleyi: Its determination and implication in the marine carbon cycle
Godoi, R. H. M.; Aerts, K.; Harlay, Jérôme ULg et al

in Microchemical Journal (2009), 91(2), 266-271

Most of the marine precipitation of CaCO3 is due to the biological activities of planktonic and benthic organisms in waters largely oversaturated with respect to calcium carbonates. This saturation state ... [more ▼]

Most of the marine precipitation of CaCO3 is due to the biological activities of planktonic and benthic organisms in waters largely oversaturated with respect to calcium carbonates. This saturation state is expected to decrease as CO2 increases in seawater. A conventional view in oceanography suggests that calcium carbonates organisms are preserved in oversaturated waters and dissolve only below the lysocline. However. it has be postulated that a fraction of the CaCO3 precipitated biogenically could dissolve in oversaturated waters due to the formation of microenvironments in which respired CO2 decreases the saturation state of seawater (Omega) in the vicinity of CaCO3 crystals. In the present study, cells of the coccolithophore Emiliania huxleyi obtained from laboratory cultures and field samples collected in the Gulf of Biscay, were examined using "variable-energy" electron-probe microanalysis. to determine the presence and thickness of their organic coating. In addition, a new approach for transferring micrometer-sized particles from a filter onto transmission electron microscope grids using manipulators was used to investigate individual coccolithophores. The dry thickness of an organic coating over the coccolithophore surface was found to range between 280 and 350 nm. The resemblance of this coating to the carbohydrates produced and released by the cell is discussed as well as their potential for constituting a microenvironment that hosts bacteria. The properties of this organic coating and its role in the preservation/dissolution and export of biogenic carbonates in the water column are one of the major issues of carbonate geochemistry. (C) 2009 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 40 (1 ULg)
Full Text
See detailMeasuring home-range quality in the frugivorous gibbon (Hylobates lar)
Hambuckers, Alain ULg; Huynen, Marie-Claude ULg; Savini, Tommaso

Conference (2009)

Detailed reference viewed: 66 (12 ULg)
Full Text
Peer Reviewed
See detailPlace des fibrates dans le traitement de patients avec une dyslipidemie atherogene.
Ducobu, J.; Scheen, André ULg; Legat, P. et al

in Revue Médicale de Liège (2009), 64(10), 512-8

The demography of dyslipidemia has changed towards a more complex atherogenic dyslipidemia involving increased levels of LDL cholesterol, in particular highly atherogenic small dense particles ... [more ▼]

The demography of dyslipidemia has changed towards a more complex atherogenic dyslipidemia involving increased levels of LDL cholesterol, in particular highly atherogenic small dense particles, hypertriglyceridemia and low HDL cholesterol, together with increased levels of markers of inflammation, thrombogenesis and endothelial dysfunction. Statins were shown to significantly lower cardiovascular morbidity and mortality, but treated patients are still left with a high residual risk, in particular for those with metabolic syndrome, type 2 diabetes, or low HDL cholesterol levels. Fibrates have been shown to reduce plasma triglycerides and increase HDL cholesterol, while improving inflammation, thrombogenesis and endothelial dysfunction. Clinical trials with fibrates have demonstrated their potential to reduce cardiovascular morbidity and mortality too, often through other mechanisms than those of statins. Combination trials of statins with fibrates have shown a more complete improvement of lipid profile and risk markers than each class separately. In contrast with gemfibrozil, fenofibrate does not interact significantly with the pharmacokinetics of statins, and its combination with statins has been shown to have a low risk of muscular side-effects or liver toxicity. The ACCORD outcome trial is exploring possible benefits of the combination of fenofibrate with statins on morbidity and mortality of patients with type 2 diabetes. [less ▲]

Detailed reference viewed: 181 (10 ULg)
Full Text
Peer Reviewed
See detailEvaluation of network equivalents for voltage optimization in multi-area power systems
Phulpin, Yannick; Miroslav, Begovic; Petit, Marc et al

in IEEE Transactions on Power Systems (2009), 24(2), 729-743

The paper addresses the problem of decentralized optimization for a power system partitioned into several areas controlled by different transmission system operators (TSOs). The optimization variables are ... [more ▼]

The paper addresses the problem of decentralized optimization for a power system partitioned into several areas controlled by different transmission system operators (TSOs). The optimization variables are the settings for taps, generators’ voltages and compensators’, and the objective function is either based on the minimization of reactive power support, the minimization of active power losses, or a combination of both criteria. We suppose that each TSO assumes an external network equivalent for its neighboring areas and optimizes without concern for the neighboring systems’ objectives its own optimization function. We study, in the context where every TSO adopts the same type of objective function, the performance of an iterative scheme, where every TSO refreshes at each iteration the parameters of its external network equivalents depending on its past internal observations, solves its local optimization problem, and then, applies its “optimal actions” to the power system. In the context of voltage optimization, we find out that this decentralized control scheme can converge to nearly optimal global performance for relatively simple equivalents and simple procedures for fitting their parameters. [less ▲]

Detailed reference viewed: 76 (16 ULg)
Full Text
Peer Reviewed
See detailNumerical Evaluation of Load induced Thermal Strain in restraint Structures compared with an Experimental Study on reinforced Concrete Columns
Schneider, Ulrich; Schneider, Martin; Franssen, Jean-Marc ULg

in Conference Proceedings Fire and Materials 2009 (2009)

Detailed reference viewed: 95 (9 ULg)
Full Text
Peer Reviewed
See detailComparison between the charring rate model and the conductive model of Eurocode 5
Cachim, Paulo B.; Franssen, Jean-Marc ULg

in Fire & Materials (2009), 33

Eurocode 5, Part 1-2, presents several models for the calculation of fire resistance of timber structures. These models are based on the hypothesis that for temperatures above 300°C, wood is no longer ... [more ▼]

Eurocode 5, Part 1-2, presents several models for the calculation of fire resistance of timber structures. These models are based on the hypothesis that for temperatures above 300°C, wood is no longer able to sustain any stress, which makes the determination of the location of the 300°C isotherm decisive for the result provided by the models. In this paper, the charring rate model and the conductive model presented in Eurocode 5, part 1-2 are compared regarding the determination of the location of 300°C isotherm. The main wood parameters investigated are density, moisture content and anisotropy. the almost complete independence of the charring rate model from these parameters leads to some inconsistencies between the models. To reduce thse inconsistencies some proposals to improve the conductive and the charring rate models are presented. [less ▲]

Detailed reference viewed: 103 (3 ULg)
Full Text
Peer Reviewed
See detailShape and amount of the Quaternary uplift of the western Rhenish shield and the Ardennes (western Europe)
Demoulin, Alain ULg; Hallot, Eric ULg

in Tectonophysics (2009), 474

A good evaluation of the Quaternary uplift of the Rhenish shield is a key element for the understanding of the Cenozoic geodynamics of the western European platform in front of the alpine arc. Previous ... [more ▼]

A good evaluation of the Quaternary uplift of the Rhenish shield is a key element for the understanding of the Cenozoic geodynamics of the western European platform in front of the alpine arc. Previous maps of the massif uplift relied on fluvial incision data since the time of the rivers' Younger Main Terrace to infer a maximum post-0.73 Ma uplift of ~290 m in the SE Eifel. Here, we propose a new interpretation of the incision data of the intra-massif streams, where anomalies in the terrace profiles would result from knickpoint retreat in the tributaries of the main rivers rather than from tectonic deformation. We also use additional geomorphological data referring to (1) deformed Tertiary planation surfaces, (2) the history of stream piracy that severely affected the Meuse basin in the last 1 Ma, and (3) incision data outside the Rhenish shield. A new map of the post-0.73 Ma uplift of the Rhenish shield is drawn on the basis of this enlarged dataset. It reduces the maximum amount of tectonic uplift in the SE Eifel to ~140 m and modifies the general shape of the uplift, namely straightening its E–W profile. It is also suggested that an uplift wave migrated across the massif, starting from its southern margin in the early Pleistocene and currently showing the highest intensity of uplift in the northern Ardennes and Eifel. These features seem to favour an uplift mechanism chiefly related to lithospheric folding and minimize the impact on the topography of a more local Eifel plume. [less ▲]

Detailed reference viewed: 63 (12 ULg)
Full Text
Peer Reviewed
See detailDoes Imidacloprid Seed-Treated Maize Have an Impact on Honey Bee Mortality?
Nguyen, Bach Kim ULg; Saegerman, Claude ULg; PIRARD, Catherine ULg et al

in Journal of Economic Entomology (2009), 102(2), 616-623

Beekeepers suspected maize. Zea mays L., treated with imidacloprid to result in substantial loss of honey bee (Hymenoptera: Apidae) colonies in Belgium. The objective of this study was to investigate the ... [more ▼]

Beekeepers suspected maize. Zea mays L., treated with imidacloprid to result in substantial loss of honey bee (Hymenoptera: Apidae) colonies in Belgium. The objective of this study was to investigate the potential impact of maize grown from imidacloprid-treated seeds on honey bee mortality. A survey of 16 apiaries was carried out, and all maize fields treated or not with imidacloprid were located within a radius of 3,000 m around the observed apiaries. Samples of honey, beeswax, and bees were collected in three colonies per apiary and analyzed for pesticide contain by liquid chromatography-tandem mass spectrometry and gas chromatography-tandem mass spectrometry. We first found significant correlation between the number of colonies per apiary and the mortality rates in an apiary. In addition, this mortality rate was inversely correlated with the surface of maize fields treated and not with imidacloprid, suggesting that this pesticide do not interact with bees fitness. Moreover, a very large number of our samples contained acarcides either prohibited or ineffective against varroa destructor (Anderson & Trueman) (Acari: Varroidae), suggesting that the treatment method used by the beekeepers to be inadequate for mite control. Our results support the hypothesis that imidacloprid seed-treated maize has no negative impact on honey bees. [less ▲]

Detailed reference viewed: 454 (53 ULg)
Full Text
Peer Reviewed
See detailNegociation and Transaction in the Context of Restructuring: Ethics, Trust and Social Responsability
Robert, Jocelyne ULg

in Harrisson, Denis; Szell, György; Bourque, Reynald (Eds.) Social Innovation,the Social Economy and World Economic Development (2009)

Detailed reference viewed: 66 (35 ULg)
Full Text
See detailLe travail au féminin
Cornet, Annie ULg

in Tilquin, Thierry (Ed.) Pourquoi travailler encore? Sens, non-sens, décence du travail et non-travail (2009)

Le travail féminin a bien entendu ses particularités. Mais nos sociétés sont-elles attentives à leurs implications ? Et les pratiques d’aujourd’hui témoignent-elles de changements significatifs sur leplan ... [more ▼]

Le travail féminin a bien entendu ses particularités. Mais nos sociétés sont-elles attentives à leurs implications ? Et les pratiques d’aujourd’hui témoignent-elles de changements significatifs sur leplan d’un « plus » d’égalité entre femmes et hommes ? Que révèlent les situations, les évolutions et les tendances actuelles ? Ces questions sont rencontrées par Annie Cornet. Il se trouve que l’approche attentive au « genre » - the gender - est déterminante pour donner à voir et à comprendre les évolutions en cours. Le « genre » et les stéréotypes culturels, de type sexiste, interviennent dans une multiplicité de domaines qui influencent l’emploi au féminin. [less ▲]

Detailed reference viewed: 68 (13 ULg)