Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailComputed Tomography and Magnetic Resonance Findings in Athletes at Risk for Sudden Cardiac Death
Ghekiere, Olivier; Nchimi Longang, Alain ULg; Bijnens, Eric et al

in Journal of the Belgian Society of Radiology (2016, February), 1

Detailed reference viewed: 21 (1 ULg)
Full Text
Peer Reviewed
See detailNumerical modeling of the long term behavior of Municipal Solid Waste in a bioreactor landfill
Hubert, Julien ULg; Xianfeng, Liu; Collin, Frédéric ULg

in Computers and Geotechnics (2016), 72

This paper presents a thermo-hydro–biochemo-mechanical model for simulating the long term behavior of Municipal Solid Waste (MSW) in a bioreactor landfill, in which the multi-physics coupling mechanism ... [more ▼]

This paper presents a thermo-hydro–biochemo-mechanical model for simulating the long term behavior of Municipal Solid Waste (MSW) in a bioreactor landfill, in which the multi-physics coupling mechanism plays a dominant role. In the model, a two-stage anaerobic biochemical model based on McDougall’s formulation is incorporated into a fully coupled thermo-hydro-mechanical models originally developed for unsaturated porous medium. The mechanical model is a modified Camclay model allowing for biochemical hardening/softening, while the thermal model is described by a classical energy balance equation with a source term accounting for the heat generation from the biodegradation of organic matter. The hydraulic model is an unsaturated flow model using Richard’s equation. The derived coupled model is implemented into an in-house built multi-physics finite element code. Finally, numerical simulations were performed to illustrate the capability of the proposed model for estimating long-term settlement of a bioreactor landfill and its aptitude as a landfill management tool for optimizing the landfill operation [less ▲]

Detailed reference viewed: 36 (9 ULg)
Peer Reviewed
See detailTransformational Leadership, Role Conflict and the Moderating Role of Uncertainty Avoidance
Selzer, Veronika Luisa; Schumann, Jan Hendrik; Büttgen, Marion et al

Conference (2016, February)

Detailed reference viewed: 27 (1 ULg)
Full Text
See detailLa diversité des expressions culturelles au tourbillon du numérique
Vlassis, Antonios ULg

E-print/Working paper (2016)

Detailed reference viewed: 29 (2 ULg)
See detailGeschichtsvereine und Geschichtsbewusstsein in der DG (2. Teil)
Brüll, Christoph ULg

Article for general public (2016)

Detailed reference viewed: 24 (1 ULg)
Full Text
Peer Reviewed
See detailUse of dual carbon-chlorine isotope analysis to assess the degradation pathways of 1,1,1-trichloroethane in groundwater
Palau, Jordi; Jamin, Pierre ULg; Badin, Alice et al

in Water Research (2016)

Compound-specific isotope analysis (CSIA) is a powerful tool to track contaminant fate in groundwater. However, the application of CSIA to chlorinated ethanes has received little attention so far. These ... [more ▼]

Compound-specific isotope analysis (CSIA) is a powerful tool to track contaminant fate in groundwater. However, the application of CSIA to chlorinated ethanes has received little attention so far. These compounds are toxic and prevalent groundwater contaminants of environmental concern. The high susceptibility of chlorinated ethanes like 1,1,1-trichloroethane (1,1,1-TCA) to be transformed via different competing pathways (biotic and abiotic) complicates the assessment of their fate in the subsurface. In this study, the use of a dual C-Cl isotope approach to identify the active degradation pathways of 1,1,1-TCA is evaluated for the first time in an aerobic aquifer impacted by 1,1,1-TCA and trichloroethylene (TCE) with concentrations of up to 20 mg/L and 3.4 mg/L, respectively. The reaction-specific dual carbon-chlorine (C-Cl) isotope trends determined in a recent laboratory study illustrated the potential of a dual isotope approach to identify contaminant degradation pathways of 1,1,1-TCA. Compared to the dual isotope slopes (Δδ13C/Δδ37Cl) previously determined in the laboratory for dehydrohalogenation / hydrolysis (DH/HY, 0.33 ± 0.04) and oxidation by persulfate (∞), the slope determined from field samples (0.6 ± 0.2, r2 = 0.75) is closer to the one observed for DH/HY, pointing to DH/HY as the predominant degradation pathway of 1,1,1-TCA in the aquifer. The observed deviation could be explained by a minor contribution of additional degradation processes. This result, along with the little degradation of TCE determined from isotope measurements, confirmed that 1,1,1-TCA is the main source of the 1,1-dichlorethylene (1,1-DCE) detected in the aquifer with concentrations of up to 10 mg/L. This study demonstrates that a dual C-Cl isotope approach can strongly improve the qualitative and quantitative assessment of 1,1,1-TCA degradation processes in the field. [less ▲]

Detailed reference viewed: 40 (7 ULg)
Full Text
Peer Reviewed
See detailNew perspectives for the design of sustainable bioprocesses for phosphorus recovery from waste
Tarayre, Cédric ULg; De Clercq, Lies; Charlier, Raphaëlle et al

in Bioresource Technology (2016), 206

Phosphate rock has long been used for the production of phosphorus based chemicals. However, considering the depletion of the reservoirs and the decrease of the quality of phosphate rocks, a potential ... [more ▼]

Phosphate rock has long been used for the production of phosphorus based chemicals. However, considering the depletion of the reservoirs and the decrease of the quality of phosphate rocks, a potential market is now emerging for the recovery of phosphate from waste and its reuse for different applications. Notably, phosphate recovery from wastewater could be included in a circular economy approach. This review focuses on the use of microbial systems for phosphorus accumulation and recovery, by considering the actual range of analytical techniques available for the monitoring of phosphorus accumulating organisms, as well as the actual biochemical and metabolic engineering toolbox available for the optimization of bioprocesses. In this context, knowledge gathered from process, system and synthetic biology could potentially lead to innovative process design. [less ▲]

Detailed reference viewed: 27 (2 ULg)
Full Text
Peer Reviewed
See detailDoes biobased polymer achieve better environmental impacts than fossil polymer? Comparison of fossil HDPE and biobased HDPE produced from sugar beet and wheat
Belboom, Sandra ULg; Léonard, Angélique ULg

in Biomass & Bioenergy (2016), 85

Polymers are one of the most used materials and the majority of their production is based on fossil fuels. Due to the decrease of oil resources and concerns about climate change, alternatives are needed ... [more ▼]

Polymers are one of the most used materials and the majority of their production is based on fossil fuels. Due to the decrease of oil resources and concerns about climate change, alternatives are needed, the transformation of biobased ethanol into biobased polymer being one of them. This paper undertakes an environmental evaluation of the production of biobased polymer produced from two different feedstock cultivated in Belgium: sugar beet and wheat. Both crops cultivation are studied as well as their transformation into biobased ethanol, first, and then to biobased ethylene, focusing on high-density polyethylene (HDPE) as final product. These scenarios are analyzed and compared with the production of conventional polymer using the life-cycle assessment (LCA) methodology with reference to relevant environmental impact categories. This study shows a reduction of impact of around 60% for both climate change and fossil fuel depletion categories when using biobased HDPE instead of its fossil counterpart. For all other impact categories, fossil HDPE achieves better results than the biobased product. [less ▲]

Detailed reference viewed: 54 (6 ULg)
Full Text
See detailLet’s work together
Chatelus, Renaud ULg; Sevini, Filippo

in WorldECR (2016), issue 47

Export control systems are complex by nature. They involve many national stakeholders. A typical national export controlapparatus requires the cooperation of between seven and 15 governmental ministries ... [more ▼]

Export control systems are complex by nature. They involve many national stakeholders. A typical national export controlapparatus requires the cooperation of between seven and 15 governmental ministries, services and agencies, each having its own mandate, constraints and work culture. But export control cannot be seen from a purely national perspective. Export control’s ultimate purpose, overall efficacy, and legal basis are genuinely international. International instruments and bodies, such as Resolution 1540 and its committee, or the various multilateral export control regimes, provide some guidance and opportunities for cooperation. It is, however, far from sufficient for addressing all the cooperation challenges at the national and international levels. Recognising this important need for cooperation, the Nuclear Security Unit of the European Joint Research Centre in Ispra, Italy, organised in March 2015, a three-day innovative EU export control simulation exercise with operatives of 11 Member States, involving standard work processes as well as specific fraud patterns. [less ▲]

Detailed reference viewed: 10 (1 ULg)
See detailResponses to Death, Care and Family Relations in Urban Senegal
Evans, Ruth; McCarthy, Jane Ribbens; Bowlby, Sophie et al

Report (2016)

Detailed reference viewed: 13 (3 ULg)
Full Text
See detailContextualisation de la pensée d'Albert Demaret et réflexion autour du déni anorexique
Mormont, Christian ULg

in Englebert, Jérôme; Follet, Valérie (Eds.) Adaptation. Essai collectif à partir des paradigmes éthologiques et évolutionnistes. (2016, February)

Contextualization of thoughts and works of Albert Demaret in the field of psychiatry and ethology. About the disavowal in anorectic female.

Detailed reference viewed: 36 (2 ULg)
Full Text
See detailPEGASE : DESCRIPTION DES PARAMÈTRES DU MODÈLE PEGASE
Everbecq, Etienne ULg; Grard, Aline ULg; MAGERMANS, POL ULg et al

Report (2016)

Le logiciel PegOpera est un outil scientifique et opérationnel utilisé entre autres par les gestionnaires de l’eau dans les champs d’applications de la Gestion Intégrée des Ressources en Eau. Développé à ... [more ▼]

Le logiciel PegOpera est un outil scientifique et opérationnel utilisé entre autres par les gestionnaires de l’eau dans les champs d’applications de la Gestion Intégrée des Ressources en Eau. Développé à l’Aquapôle de l’université de Liège, il est composé : - du modèle Pegase (Planification Et Gestion de l’ASsainissement des Eaux), un modèle intégré bassins hydrographiques/rivières qui permet de calculer de façon déterministe et prévisionnelle la qualité des eaux des rivières - d’une interface utilisateurs conviviale permettant son utilisation aisée Le modèle Pegase (Planification Et Gestion de l’ASsainissement des Eaux) est un modèle intégré bassins hydrographiques/rivières qui permet de calculer de façon déterministe et prévisionnelle la qualité des eaux des rivières en fonction des rejets et apports de pollution (relation pression-impact). Développé depuis la fin des années 1980 à l’université de Liège, il permet d'orienter les choix des opérateurs publics et privés en matière de gestion des eaux de surface à l'échelle des petits et grands bassins versants. Le modèle et le logiciel sont développés en permanence. En juillet 2014, 4 Agences de l’eau Françaises ont décidé de continuer à supporter les développements du modèle et du Logiciel avec comme objectifs principaux d’apporter des améliorations scientifiques afin d’améliorer la connaissance du fonctionnement écologique des cours d’eau, ainsi que de maintenir l’outil performant, de haut niveau technologique, en adéquation avec les besoins des opérateurs. Ce programme triennal (2014-2016), appelé PEGASE OPERA 2, s’articule sur 3 axes principaux : • Axe 1 : Développements scientifiques du modèle PEGASE (modélisation des processus) ; • Axe 2 : Modularité et Interopérabilité du logiciel PEGOPERA ; • Axe 3 : Amélioration des fonctionnalités du logiciel PEGOPERA. Ce rapport technique (destiné aux utilisateurs avertis du logiciel PegOpera) reprend une description des principaux paramètres du sous-modèle écologique de Pegase - signification des paramètres - valeurs de références des paramètres - pour certains paramètres importants, informations sur la manière dont les valeurs numériques des paramètres ont été calibrées et/ou validées - rappel de certains processus modélisés dans Pegase Plus spécifiquement, il reprend une description des sous-modèles matières en suspension / sédiments / micropolluants à prochainement intégrer dans le modèle [less ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailProspects of a new dynamic simulation software for real-time applications on the Hydro-Québec system
Aristidou, Petros; Lebeau, Simon; Loud, Lester et al

in CIGRE Science and Engineering (2016), 4

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging system dynamics. Presently, off-line calculated security limits are combined with an on-line ... [more ▼]

Hydro-Québec has a long interest in on-line Dynamic Security Assessment (DSA) driven by its challenging system dynamics. Presently, off-line calculated security limits are combined with an on-line monitoring system. However, new developments in dynamic simulation enable real-time or near-real-time DSA calculations and transfer limits determination. In this paper, the domain-decomposition-based algorithm implemented in the simulator RAMSES is presented, along with techniques to accelerate its sequential and parallel executions. RAMSES exploits the localized response to disturbances and the timescale decomposition of dynamic phenomena to provide sequential acceleration when the simulation is performed on a single processing unit. Additionally, when more units are available, the parallelization potential of domain-decomposition methods is exploited for further acceleration. The algorithm and techniques have been tested on a realistic model of the Hydro-Québec system to evaluate the accuracy of dynamic responses and the sequential and parallel performances. Finally, the real-time capabilities have been assessed using a shared-memory parallel processing platform. [less ▲]

Detailed reference viewed: 30 (2 ULg)
Full Text
Peer Reviewed
See detailEmployee Emotional Competence: Construct Conceptualization and Validation of a Customer-Based Measure
Delcourt, Cécile ULg; Gremler, Dwayne; van Riel, Allard et al

in Journal of Service Research (2016), 19(1), 72-87

Customers often experience intense emotions during service encounters. Their perceptions of how well contact employees demonstrate emotional competence in emotionally charged service encounters can affect ... [more ▼]

Customers often experience intense emotions during service encounters. Their perceptions of how well contact employees demonstrate emotional competence in emotionally charged service encounters can affect their service evaluations and loyalty intentions. Previous studies examining employees’ potential to behave in emotionally competent ways (i.e., employee emotional intelligence [EEI]) have used self- or supervisor-reported scales to predict customer outcomes, presenting EEI as stable and independent of the context. However, service firms should be more concerned with the actual display of emotionally competent behaviors by employees (employee emotional competence [EEC]), because employee behaviors vary across encounters. Moreover, a customer perspective of EEC is useful as customer perceptions of employee performance are crucial predictors of satisfaction and loyalty. Therefore, this study proposes a conceptualization and operationalization of EEC in a service encounter context. On the basis of a comprehensive literature review and in-depth interviews, the authors develop a scale to capture customer-perceived EEC, defined as an employee’s competence in perceiving, understanding, and regulating customer emotions during a discrete service encounter. The scale achieves good reliability and validity. Researchers can use it to explore the role of EEC in service contexts; managers can employ the scale to diagnose EEC and improve customers’ service encounter experiences. [less ▲]

Detailed reference viewed: 110 (11 ULg)
Peer Reviewed
See detailThe Devonian palynology of the Iberian Península: current state and future goals
Rial, Gonzalo; Diez, José B.; Cascales-Miñana, Borja ULg

Poster (2016, February)

Detailed reference viewed: 10 (0 ULg)
Peer Reviewed
See detailNew insights into the fossil record of the mangrove palm Nypa: a taphonomic study from the Iberian Peninsula
Moreno-Dominguez, Rafael; Cascales-Miñana, Borja ULg; Ferrer, Javier et al

Poster (2016, February)

Detailed reference viewed: 19 (0 ULg)