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See detailDetermination of air‐sea ice transfer coefficient for CO2: Significant contribution of gas bubble transport during sea ice growth
Kotovitch, Marie ULg; Moreau, S.; Zhou, Jiayun et al

Poster (2015, September)

Air‐ice CO2 fluxes were measured continuously from the freezing of a young sea‐ice cover until its decay. Cooling seawater was as a sink for atmospheric CO2 but asthe ice crystalsformed,sea ice shifted to ... [more ▼]

Air‐ice CO2 fluxes were measured continuously from the freezing of a young sea‐ice cover until its decay. Cooling seawater was as a sink for atmospheric CO2 but asthe ice crystalsformed,sea ice shifted to a source releasing CO2 to the atmosphere throughout the whole ice growth. Atmospheric warming initiated the decay, re‐shifting sea‐ice to a CO2 sink. Combining these CO2 fluxes with the partial pressure of CO2 within sea ice, we determined gas transfer coefficients for CO2 at air‐ice interface for growth and decay. We hypothesize that this difference originates from the transport of gas bubbles during ice growth, while only diffusion occurs during ice melt. In parallel, we used a 1D biogeochemical model to mimic the observed CO2 fluxes. The formation of gas bubbles was crucial to reproduce fluxes during ice growth where gas bubbles may account for up to 92 % of the upward CO2 fluxes. [less ▲]

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See detailDroit d'auteur et compétence internationale : de la territorialité à la mode de la Cour de justice
Wautelet, Patrick ULg

in LAMBRECHT, Maxime; Fossoul, Virginie; Delforge, Véronique (Eds.) et al 20 ans de la loi sur le droit d'auteur (2015)

Ce texte fait le point sur la jurisprudence de la Cour de justice relative au contentieux de la contrefaçon du droit d'auteur. Il s'intéresse en particulier à l'application de l'article 7(2) du Règlement ... [more ▼]

Ce texte fait le point sur la jurisprudence de la Cour de justice relative au contentieux de la contrefaçon du droit d'auteur. Il s'intéresse en particulier à l'application de l'article 7(2) du Règlement Bruxelles IIbis à ce contentieux [less ▲]

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See detailRegional occurence of greenhouses gases in groundwater: Initial results in shallow Belgian aquifers.
Hakoun, Vivien ULg; Gesels, Julie ULg; Tseng, Jean Hsiao-Chun et al

Poster (2015, September)

Currently, the lack of robust, context-distributed subsurface greenhouses gases (GHG) concentrations data is a key bottleneck to reduce the uncertainty range of GHG groundwater input to continental ... [more ▼]

Currently, the lack of robust, context-distributed subsurface greenhouses gases (GHG) concentrations data is a key bottleneck to reduce the uncertainty range of GHG groundwater input to continental surface water bodies such as rivers or lakes estimates. Carbon dioxyde (CO2), methane (CH4) and nitrous oxyde (N2O) are likely to be indirectly transferred to the atmosphere through groundwater discharge into continental surface water bodies. We aim to extend regional-scale estimates of indirect GHG emissions by screening, in numerous hydrogeological (such as alluvial, sandstone, chalk and limestone aquifers) and land use contexts (such as industrial and agricultural), the occurence of these gases. Here, we report and discuss CO2, CH4 and N2O concentrations from an initial survey conducted over selected sites (n= 40) within shallow (0-100 m depth) aquifers in Wallonia (Belgium) for the first time. The preliminary results obtained in this study show that the range of GHG concentrations varies between 5160 and 47544 ppm, 0 and 1064 nmol.L-1, as well as 1 and 5637 nmol.L-1 for the partial pressure of CO2, CH4 and N2O respectively. This new and unique regional dataset provides a first step in developping a refined understanding of favorable contexts for GHG occurence in groundwater which may be used to reduce the uncertainties related to indirect emissions of GHG through groundwater-surface water transfers. [less ▲]

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See detailComment favoriser l'apprentissage et la formation des adultes ?
Faulx, Daniel ULg; Danse, Cédric ULg

Book published by De Boeck (2015)

Comment aider les autres à apprendre et se développer ? Telle est la question centrale de cet ouvrage qui vise non seulement les formateurs, animateurs et enseignants pour adultes et adolescents mais ... [more ▼]

Comment aider les autres à apprendre et se développer ? Telle est la question centrale de cet ouvrage qui vise non seulement les formateurs, animateurs et enseignants pour adultes et adolescents mais aussi toute personne engagée dans une action de développement des autres. Ce livre propose un ensemble de théories et de concepts éclairants pour la pratique formative ainsi que des méthodologies et outils applicables en situation, le tout illustré par des exemples concrets puisés dans des formations aux thématiques psychosociales, techniques, linguistiques, artistiques ou sportives. Il est structuré en quatre parties et présente en fin de volume un ensemble de fiches-outils. 
• Partie 1. Les quatre dimensions d’une formation. Cette partie décrit les quatre gammes d'effets induits par une formation et comment le formateur peut penser son action en conséquence. 
• Partie 2. Les grands déterminants de l’action pédagogique. Ce modèle conceptuel, constitué de six paramètres, balise l’ensemble des ressources qui sont à la disposition d’un formateur pour générer les effets souhaités.
 • Partie 3. Rendre les apprenants actifs lors d’un exposé. Cette partie traite de l’art et la manière de réaliser un discours pédagogique susceptible de stimuler les auditeurs et de leur permettre d’apprendre. 
• Partie 4. L’apprentissage par expérience. Cette dernière partie porte sur les stratégies d’animation de groupe qui peuvent être déployées dans le cadre des pédagogies expérientielles (ou pédagogies fondées sur l’action). [less ▲]

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See detailCrossoads
Sacré, Robert ULg

Diverse speeche and writing (2015)

Programme de radio hebdomadaire sur Equinoxe FM 100.1 ; streaming on line www.equinoxefm.be ; podcasts www.mixcloud.com/robertsacre9 ; infos www.facebook.com/robert.sacre.9

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See detailInsolvabilité européenne et procédures secondaires
Wautelet, Patrick ULg

in Brulard, Yves (Ed.) Règlement 2015/848 relatif aux procédures d'insolvabilité - premier commentaire (2015)

Ce texte tente d'éclairer la portée des dispositions du Règlement N° 2015/848 du 20 mai 2015 relatives aux procédures secondaires : après un bilan sommaire de l'application des dispositions du Règlement ... [more ▼]

Ce texte tente d'éclairer la portée des dispositions du Règlement N° 2015/848 du 20 mai 2015 relatives aux procédures secondaires : après un bilan sommaire de l'application des dispositions du Règlement 1346/2000 relatives aux procédures secondaires, qui s'appuie principalement sur la jurisprudence de la Cour de justice, le texte commente les principales innovations du Règlement révisé. Une attention particulière est accordée à la technique de l'engagement par laquelle le syndic de la procédure principale peut éviter l'ouverture d'une procédure secondaire. [less ▲]

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Peer Reviewed
See detailOne injection of platelet-rich plasma associated to a submaximal eccentric protocol to treat chronic jumper's knee
Kaux, Jean-François ULg; Croisier, Jean-Louis ULg; Bruyère, Olivier ULg et al

in The Journal of sports medicine and physical fitness (2015), 55(9), 953-61

INTRODUCTION: Jumper's knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons ... [more ▼]

INTRODUCTION: Jumper's knee is a frequent chronic overuse syndrome of the upper part of the patellar tendon. Platelets contain lots of growth factors which could enhance the healing process of tendons. METHODS: Twenty patients with chronic upper patellar tendinopathy were enrolled. Assessments were made before infiltration of PRP, and 6 weeks and 3 months after the infiltration, using a 10--point Visual Analogic Scale, clinical examinations with a pressure algometer, algofunctional scores (IKDC and VISA--P), functional assessments (isokinetic and optojump evaluations) and imagery (ultrasounds and MRI). The PRP was obtained with an apheresis system (COM.TEC, Fresenius). Six millilitres of PRP were injected without local anaesthetic. One week after infiltration, patients started a standardised sub--maximal eccentric reeducation. RESULTS: Pain during daily activities significantly decreased with time. During functional evaluation, it decreased as well, but without significant functional improvement. No improvements in the imagery measurements were observed. Younger patients seemed to be more susceptible to have an improvement of pain by the PRP infiltration. CONCLUSION: This study demonstrates that a local infiltration of PRP associated with a submaximal eccentric protocol can improve symptoms of chronic jumper's knee in patients non--responsive to classical conservative treatments. [less ▲]

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See detailUncertainty in biology: a computational modeling approach
Geris, Liesbet ULg; Gomez-Cabrero, David

Book published by Springer (2015)

Computational modeling of biomedical processes is gaining more and more weight in the current research into the etiology of biomedical problems and potential treatment strategies. Computational modeling ... [more ▼]

Computational modeling of biomedical processes is gaining more and more weight in the current research into the etiology of biomedical problems and potential treatment strategies. Computational modeling allows to reduce, refine and replace animal experimentation as well as to translate findings obtained in these experiments to the human background. However these biomedical problems are inherently complex with a myriad of influencing factors, which strongly complicates the model building and validation process. This book wants to address four main issues related to the building and validation of computational models of biomedical processes: 1. Modeling establishment under uncertainty 2. Model selection and parameter fitting 3. Sensitivity analysis and model adaptation 4. Model predictions under uncertainty In each of the abovementioned areas, the book discusses a number of key-techniques by means of a general theoretical description followed by one or more practical examples. This book is intended for graduate students and researchers active in the field of computational modeling of biomedical processes who seek to acquaint themselves with the different ways in which to study the parameter space of their model as well as its overall behavior. [less ▲]

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See detailIUVS observations of Nitric Oxide nightglow
Stiepen, Arnaud ULg; The IUVS team

Conference (2015, September)

Detailed reference viewed: 23 (4 ULg)
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See detailContribution of the Finite Volume Point Dilution Method for measurement of groundwater fluxes in a fractured aquifer
Jamin, Pierre ULg; Goderniaux, Pascal; Bour, Olivier et al

Conference (2015, September)

The measurement of groundwater fluxes is the basis of all hydrogeological studies. Groundwater flux calculation with Darcy’s law from piezometric gradient measurements and estimation of hydraulic ... [more ▼]

The measurement of groundwater fluxes is the basis of all hydrogeological studies. Groundwater flux calculation with Darcy’s law from piezometric gradient measurements and estimation of hydraulic conductivity with pumping/slug tests may lead to cumulated errors on spatial variability, in particular in heterogeneous contexts such as fractured aquifers. Alternative methods, such as point dilution tracer tests to obtain a direct measurement of local groundwater fluxes, are promising. In this study classical Point Dilution Method (PDM) and Finite Volume Point Dilution Method (FVPDM) are compared on the fractured crystalline aquifer of Ploemeur, France. The manipulation includes the first use of the FVPDM in a fractured aquifer using a double packer. This configuration limits the vertical extent of the tested zone to target a precise fracture zone of the aquifer. The result of this experiment wasa continuous monitoring of groundwater flux that lasted more than 4 days. Measurements of groundwater flow rate in the fracture (Qt) by PDM only provide good estimates if the mixing volume (Vw) (volume of water in which the tracer is mixed) is known precisely. Conversely, FVPDM allows for an independent estimation of Vw and Qt, leading to better precision in case of complex experimental setup such as this one. The precision of PDM does not depend upon the duration of the experiment while FVPDM may require long experimental duration to guarantee a precise result. Classical PDM should be used to rapidly estimate the groundwater flux using a simple experimental setup. However, FVPDM is a more precise method with great potential for development but it may require a longer experiment duration to achieve high precision if the groundwater flux investigated islow and/or the mixing volume is large. [less ▲]

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See detailDiscovery of Diffure Aurora on Mars
Stiepen, Arnaud ULg; Schneider; Jain et al

Conference (2015, September)

The Imaging Ultraviolet Spectrograph (IUVS, McClintock et al., 2014) onboard the MAVEN spacecraft has discovered diffuse aurora in Mars’ northern hemisphere spanning a wide range of geographic latitudes ... [more ▼]

The Imaging Ultraviolet Spectrograph (IUVS, McClintock et al., 2014) onboard the MAVEN spacecraft has discovered diffuse aurora in Mars’ northern hemisphere spanning a wide range of geographic latitudes and longitudes (Figure 1). This widespread aurora differs from the small auroral patches discovered by the SPICAM instrument onboard the Mars Express spacecraft (Bertaux et al., 2005; Leblanc et al., 2008; Gérard et al., submitted; Soret et al., submitted) restricted to regions of crustal magnetic fields in the southern hemisphere. Furthermore, the northern diffuse aurora appears to peak at altitudes below 100 km, while the crustal field aurora peaked around 120 km. [less ▲]

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See detailFirst Results From MAVEN’s Imaging UV Spectrograph
Schneider; McClintock; Stewart et al

Conference (2015, September)

We report the first results from The Imaging Ultraviolet Spectrograph (IUVS) aboard the Mars Atmosphere and Volatile and EvolutioN (MAVEN) spacecraft orbiting Mars. The instrument is accomplishing its ... [more ▼]

We report the first results from The Imaging Ultraviolet Spectrograph (IUVS) aboard the Mars Atmosphere and Volatile and EvolutioN (MAVEN) spacecraft orbiting Mars. The instrument is accomplishing its goals of characterizing the atmospheric composition and structure, enabling studies of atmospheric escape that will contribute to our understanding of Mars’ atmospheric evolution. In addition, the instrument has made unexpected discoveries concerning meteor showers, aurora and nightglow on Mars. [less ▲]

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See detailThe use of the Vadose Zone Experimental Setup as an innovative in situ characterization method for the vadose zone: a case study at an industrial contaminated site in Belgium
Fernandez de Vera, Natalia ULg; Beaujean, Jean ULg; Jamin, Pierre ULg et al

Conference (2015, September)

The development of protection and remediation plans for contaminated soil and groundwater require a detailed understanding of the transport of pollutants in the subsurface. However, such understanding is ... [more ▼]

The development of protection and remediation plans for contaminated soil and groundwater require a detailed understanding of the transport of pollutants in the subsurface. However, such understanding is affected by the lack of spatial and temporal coverage provided by the current in situ characterization technologies. A new system has been developed in order to overcome such limitations. The vadose zone experimental setup is a new development combining cross-hole geophysics and the Vadose Zone Monitoring System (VMS). In cross-hole geophysics, an injection of an electrical current using electrodes installed in vertical boreholes is triggered. From measured potential differences, spatial patterns related with subsurface heterogeneities, water content and solute concentrations are inferred. The VMS allows continuous measurements of water content at different depths of the vadose zone, as well as water sampling. The system is formed by a flexible sleeve containing monitoring units along its depth which is installed in a slanted borehole. The system was installed at a former industrial site in Belgium, where soil and groundwater are contaminated with BTEX, PAH, and heavy metals. Two VMS were installed in two slanted boreholes on site, together with four vertical boreholes containing electrodes for geophysical measurements. The site was initially monitored under natural recharge conditions. Water content sensors located along the VMS registered fast wetting and draining reactions to rainfall events followed by the activation of water transport through fractures. Results from soil water samples show continuous evolution of water chemistry with depth, due to disequilibrium between infiltrated water and the hydrochemical conditions in the unsaturated zone. Subsequently, a saline tracer was injected in the surface. The transport of the tracer in the subsurface was monitored via cross-hole and surface geophysics. Results from imaging reflect the evolution of a plume through vertical and lateral transport and dilution. [less ▲]

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See detailNudge and the Law: A European Perspective
Sibony, Anne-Lise ULg; Alemanno, Alberto

Book published by Hart Publishing (2015)

Behavioural sciences provide a better understanding of human decision-making. Increasingly, governments around the world are keen to rely on these insights for reshaping public interventions in a wide ... [more ▼]

Behavioural sciences provide a better understanding of human decision-making. Increasingly, governments around the world are keen to rely on these insights for reshaping public interventions in a wide range of policy areas such as energy, health, financial services and data protection. When policy-making meets behavioural sciences, effective, low- cost and choice preserving regulations can emerge in the form of default rules, smart disclosure and simplification requirements. While behaviourally-informed regulation has a huge potential, it also attracts legitimacy and practicability concerns. Nudge and the Law explores the legal implications of the emergent phenomenon of behavioural regulation by focusing on the challenges and opportunities it may offer to EU policy-making and beyond [less ▲]

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See detailControlling factors and occurrence of inorganic and organic compounds in groundwater of urban and industrial areas
Gesels, Julie ULg; Dollé, Fabien ULg; Leclercq, Julie et al

Conference (2015, September)

A relatively extensive survey of groundwater contaminants is performed in urban and industrial contexts, at the regional scale (Walloon Region of Belgium), outside spots of contamination related to ... [more ▼]

A relatively extensive survey of groundwater contaminants is performed in urban and industrial contexts, at the regional scale (Walloon Region of Belgium), outside spots of contamination related to contaminated sites. More specifically, the most detected inorganic trace elements and organic contaminants are identified and their levels of occurrence are described statistically. Mechanisms that can explain their occurrence in groundwater are discussed. From a more pragmatic point of view, the data set has been also used to derive upper limits of pollutant background concentrations to be used in decision-making related to the management of contaminated groundwater in urban and industrial environments. The results presented are based on 243 samples from 8 sectors located in different geological contexts and different urban and industrial contexts. Each groundwater sample was analyzed for 19 inorganic trace elements, 61 organic micro-pollutants and 10 major and minor elements. Five physico-chemical parameters were measured in the field, at the time of sampling to determine the environmental conditions prevailing in groundwater. For comparison, existing groundwater analyses in natural context, available for the entire Walloon Region, were compiled from several databases. Cumulative distribution function plots allow comparing the distributions of inorganic trace elements in urban and industrial sectors to those obtained at the scale of the entire Walloon region. Cumulative distribution function plots are also used to compare the distribution of the inorganic trace elements in the different lithologies, in urban and industrial contexts. The composition of groundwater is altered in urban and industrial sectors with increased concentrations for most inorganic trace elements and organic contaminants. Anthropogenic influence is not limited to inputs of pollutants but also to alterations of subsurface environmental conditions, in particular redox conditions, resulting in the mobilization of pollutants. The influence of lithology is also marked in the data set. [less ▲]

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Peer Reviewed
See detailCell-based description of ventricular contraction in a model of the human cardiovascular system
Kosta, Sarah ULg; Negroni, Jorge; Lascano, Elena et al

in Preprints of the 9th IFAC Symposium on Biological and Medical Systems (2015, September)

A multiscale model of the cardiovascular system (CVS) is presented. Hemodynamics is described by a lumped parameter model, while heart contraction is described at the cellular scale. An ... [more ▼]

A multiscale model of the cardiovascular system (CVS) is presented. Hemodynamics is described by a lumped parameter model, while heart contraction is described at the cellular scale. An electrophysiological model and a mechanical model were coupled and adjusted so that the pressure and volume of both ventricles are linked to the force and length of a half-sarcomere. Particular attention was paid to the extremal values of the sarcomere length, which must keep physiological values. This model is able to reproduce healthy behavior, preload variations experiments, and ventricular failure. [less ▲]

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Peer Reviewed
See detailAlkali injuries may lead to errors of diagnosis and mistreatment (161)
JACQUEMIN, Denise ULg

Conference (2015, September)

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Peer Reviewed
See detailNon-invasive vagus nerve stimulation for PREVention and Acute treatment of chronic cluster headache (PREVA): A randomised controlled study.
Gaul, Charly; Diener, Hans-Christoph; Silver, Nicholas et al

in Cephalalgia : An International Journal of Headache (2015)

Background: Chronic cluster headache (CH) is a debilitating disorder for which few well-controlled studies demonstrate effectiveness of available therapies. Non-invasive vagus nerve stimulation (nVNS) was ... [more ▼]

Background: Chronic cluster headache (CH) is a debilitating disorder for which few well-controlled studies demonstrate effectiveness of available therapies. Non-invasive vagus nerve stimulation (nVNS) was examined as adjunctive prophylactic treatment of chronic CH. Methods: PREVA was a prospective, open-label, randomised study that compared adjunctive prophylactic nVNS (n=48) with standard of care (SoC) alone (control (n=49)). A two-week baseline phase was followed by a four-week randomised phase (SoC plus nVNS vs control) and a four-week extension phase (SoC plus nVNS). The primary end point was the reduction in the mean number of CH attacks per week. Response rate, abortive medication use and safety tolerability were also assessed. Results: During the randomised phase, individuals in the intent-to-treat population treated with SoC plus nVNS (n=45) had a significantly greater reduction in the number of attacks per week vs controls (n=48) (-5.9 vs -2.1, respectively) for a mean therapeutic gain of 3.9 fewer attacks per week (95% CI: 0.5, 7.2; p=0.02). Higher #50% response rates were also observed with SoC plus nVNS (40% (18/45)) vs controls (8.3% (4/48); p<0.001). No serious treatment-related adverse events occurred. Conclusion: Adjunctive prophylactic nVNS is a well-tolerated novel treatment for chronic CH, offering clinical benefits beyond those with SoC. [less ▲]

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Peer Reviewed
See detailChallenges for the restoration of dry calcareous grasslands in quarries: does nature need help?
Pitz, Carline ULg; Piqueray, Julien; Harzé, Mélanie ULg et al

Conference (2015, August 26)

In order to maximize the biodiversity potential of dry calcareous grasslands in former quarries two options are available to managers: (i) allow species to spontaneously recolonize the site, (ii ... [more ▼]

In order to maximize the biodiversity potential of dry calcareous grasslands in former quarries two options are available to managers: (i) allow species to spontaneously recolonize the site, (ii) implement technical support for ecosystem restoration. This study aimed at characterizing the spontaneous communities established in dry area of unexploited quarries and at comparing communities encountered to the succession panel of dry grasslands. To evaluate the ecological succession in quarries, three successional stages where defined: (i) less than three years; (ii) three to 20 years; and (iii) more than 20 years after exploitation. For each successional stage, six parcels were selected and 20 1m2 plots were randomly marked in each parcel. All selected parcels presented dry grasslands abiotic conditions: filtering and stony soils and south orientation. During the 2014 vegetation period, percentage cover of higher plant species was recorded in each plot. Explaining environmental variables including coordinates, altitude, slope (degrees), soil depth, exposure, maximum vegetation height, bare ground cover, moss cover, and shrub cover (%) were measured. Our main results showed that, over decades of time, the ecological succession in dry area of unexploited quarries does not approach a typical formation of dry calcareous grassland. Most recolonizations tended to form meadows communities, except for three sites belonging to a specific landscape context. Potential implications for future quarries restoration will be discussed. [less ▲]

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See detailGeophysical Investigation of the Pb-Zn deposit of Lontzen-Popplsberg, Belgium
Evrard, Maxime ULg

Conference (2015, August 26)

Detailed reference viewed: 37 (4 ULg)