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See detailPartenariats transrégionaux, technologies numériques et culture : de la convergence numérique aux divergences normatives
Vlassis, Antonios ULiege

in Deblock, Chrstian; Levesque, Céline; Paquin, Stephane (Eds.) et al Les partenariats commerciaux à l'ére de l'interconnexion (2018)

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See detailEnergy harvesting from different aeroelastic instabilities of a square cylinder
Andrianne, Thomas ULiege; Aryoputro, Renar; Laurent, Philippe ULiege et al

in Journal of Wind Engineering & Industrial Aerodynamics (2018), 172

This paper presents an experimental and numerical investigation of the power extraction from the oscillations of a square beam due to aeroelastic instabilities. The energy harvesting is performed using a ... [more ▼]

This paper presents an experimental and numerical investigation of the power extraction from the oscillations of a square beam due to aeroelastic instabilities. The energy harvesting is performed using a coil-magnet arrangement connected to a variable resistance load with the target objective to auto-power a remote sensor. Two aeroelastic phenomena are investigated: Vortex Induced Vibration (VIV) and cross-flow galloping. The first instability (VIV) is analyzed on a free-standing vertical structure. A second experimental set-up is developed on a horizontal square cylinder supported by springs, free to oscillate vertically as a rigid body. In this case, both galloping and VIV interact, leading to interesting characteristics in order to harvest energy from the wind. The behavior of each electro-mechanical aeroelastic system is investigated for different reduced wind speeds and load resistances in a wind tunnel. Observed efficiencies are rather low, but large enough to power a remote sensor with an adapted measuring strategy. Both harvesting systems are then studied numerically using a wake oscillator model (for VIV) coupled to a quasi-steady model (for galloping) and an electric model (for the harvester). This mathematical model is used to extend the parametric space and to highlight the effectiveness of the high stable branch of the VIV-galloping curve to harvest energy. [less ▲]

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See detailHeterogeneous incidence and propagation of spreading depolarizations
Kaufmann, D; SCHOENEN, Jean ULiege

in Journal of Cerebral Blood Flow & Metabolism (2018)

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See detailHow does STICS crop model simulate crop growth and productivity under shade conditions?
Artru, Sidonie ULiege; Dumont, Benjamin ULiege; Ruget, Francois et al

in Field Crops Research (2018), 215

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See detailDroit matériel européen 2017-2018 - Agenda et plan du cours
Van Cleynenbreugel, Pieter ULiege

Learning material (2018)

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See detailDroit matériel européen 2017-2018 - Recueil de documentation
Van Cleynenbreugel, Pieter ULiege

Learning material (2018)

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See detailOccurrence of greenhouse gases in the aquifers of the Walloon Region (Belgium)
Jurado Elices, Anna ULiege; Borges, Alberto ULiege; Pujades, Estanislao ULiege et al

in Science of the Total Environment (2018)

This work aims to (1) identify the most conductive conditions for the generation of greenhouses gases (GHGs) in groundwater (e.g., hydrogeological contexts and geochemical processes) and (2) evaluate the ... [more ▼]

This work aims to (1) identify the most conductive conditions for the generation of greenhouses gases (GHGs) in groundwater (e.g., hydrogeological contexts and geochemical processes) and (2) evaluate the indirect emissions of GHGs from groundwater at a regional scale in Wallonia (Belgium). To this end, nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) concentrations and the stable isotopes of nitrate (NO3−) and sulphate were monitored in 12 aquifers of the Walloon Region (Belgium). The concentrations of GHGs range from 0.05 µg/L to 1631.2 µg/L for N2O, 0 µg/L to 17.1 µg/L for CH4, and 1769 to 100,514 ppm for the partial pressure of CO2 (pCO2). The highest average concentrations of N2O and pCO2 are found in a chalky aquifer. The coupled use of statistical techniques and stable isotopes is a useful approach to identify the geochemical conditions that control the occurrence of GHGs in the aquifers of the Walloon Region. The accumulation of N2O is most likely due to nitrification (high concentrations of dissolved oxygen and NO3− and null concentrations of ammonium) and, to a lesser extent, initial denitrification in a few sampling locations (medium concentrations of dissolved oxygen and NO3−). The oxic character found in groundwater is not prone to the accumulation of CH4 in Walloon aquifers. Nevertheless, groundwater is oversaturated with GHGs with respect to atmospheric equilibrium (especially for N2O and pCO2); the fluxes of N2O (0.32 kg N2O-N Ha-1 y-1) and CO2 (27 kg CO2 Ha-1 y-1) from groundwater are much lower than the direct emissions of N2O from agricultural soils and fossil-fuel-related CO2 emissions. Thus, indirect GHG emissions from the aquifers of the Walloon Region are likely to be a minor contributor to atmospheric GHG emissions, but their quantification would help to better constrain the nitrogen and carbon budgets. [less ▲]

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See detailEffects of agricultural land use on fluvial carbon dioxide, methane and nitrous oxide concentrations in a large European river, the Meuse (Belgium)
Borges, Alberto ULiege; Darchambeau, F.; Lambert, T et al

in Science of the Total Environment (2018), 610–611

We report a data-set of CO2, CH4, and N2O concentrations in the surface waters of the Meuse river network in Belgium, obtained during four surveys covering 50 stations (summer 2013 and late winter 2013 ... [more ▼]

We report a data-set of CO2, CH4, and N2O concentrations in the surface waters of the Meuse river network in Belgium, obtained during four surveys covering 50 stations (summer 2013 and late winter 2013, 2014 and 2015), from yearly cycles in four rivers of variable size and catchment land cover, and from 111 groundwater samples. Surface waters of the Meuse river network were over-saturated in CO2, CH4, N2O with respect to atmospheric equilibrium, acting as sources of these greenhouse gases to the atmosphere, although the dissolved gases also showed marked seasonal and spatial variations. Seasonal variations were related to changes in freshwater discharge following the hydrological cycle, with highest concentrations of CO2, CH4, N2O during low water owing to a longer water residence time and lower currents (i.e. lower gas transfer velocities), both contributing to the accumulation of gases in the water column, combined with higher temperatures favourable to microbial processes. Inter-annual differences of discharge also led to differences in CH4 and N2O that were higher in years with prolonged low water periods. Spatial variations were mostly due to differences in land cover over the catchments, with systems dominated by agriculture (croplands and pastures) having higher CO2, CH4, N2O levels than forested systems. This seemed to be related to higher levels of dissolved and particulate organic matter, as well as dissolved inorganic nitrogen in agriculture dominated systems compared to forested ones. Groundwater had very low CH4 concentrations in the shallow and unconfined aquifers (mostly fractured limestones) of the Meuse basin, hence, should not contribute significantly to the high CH4 levels in surface riverine waters. Owing to high dissolved concentrations, groundwater could potentially transfer important quantities of CO2 and N2O to surface waters of the Meuse basin, although this hypothesis remains to be tested. [less ▲]

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See detailUnderstanding urban development types and drivers in Wallonia. A multi-density approach
El Saeid Mustafa, Ahmed Mohamed ULiege; Saadi, Ismaïl ULiege; Cools, Mario ULiege et al

in International Journal of Business Intelligence and Data Mining (2018), 13(Nos. 1/2/3), 309330

In this study, urban development process in the Walloon region (Belgium) has been analysed. Two main aspects of development are quantitatively measured: the development type and the definition of the main ... [more ▼]

In this study, urban development process in the Walloon region (Belgium) has been analysed. Two main aspects of development are quantitatively measured: the development type and the definition of the main drivers of the urbanisation process. Unlike most existing studies that consider the urban development as a binary process, this research considers the urban development as a continuous process, characterised by different levels of urban density. Eight urban classes are defined based on the Belgian cadastral data for years 2000 and 2010. A multinomial logistic regression model is employed to examine the main driving forces of the different densities. Sixteen drivers were selected, including accessibility, geo-physical features, policies and socio-economic factors. Finally, the changes from the non-urban to one of the urban density classes are detected and classified into different development types. The results indicate that zoning status (political factor), slope, distance to roads, population densities and mean land price, respectively, have impact on the urbanisation process whatever maybe the density. The results also show that the impact of these factors highly varies from one density to another. [less ▲]

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See detailThe role of market-oriented institutions in the deployment of renewable energies: evidences from Europe
Jacqmin, Julien ULiege

in Applied Economics (2018), 50(2), 202-215

Focusing on European countries, this article investigates the link between market-oriented institutions, as measured by the Economic Freedom Index, and the production of energy from renewable sources. A ... [more ▼]

Focusing on European countries, this article investigates the link between market-oriented institutions, as measured by the Economic Freedom Index, and the production of energy from renewable sources. A dynamic panel approach shows that this correlation is positive and significant while the subcomponents of the Economic Freedom Index reveal that not all market-oriented institutions have a similar impact. Indeed, long-term price stability and freedom to trade boost the reliance on renewable energies whereas the importance given to markets rather than governments has no significant impact. [less ▲]

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See detailIdée et perception. Une recherche épistémologique à partir de Descartes
Twardowski, Kasimir; Dewalque, Arnaud ULiege

in Twardowski, Kasimir; Fisette, Denis (Eds.) TBA (recueil de textes de K. Twardowski) (2018)

La dissertation doctorale de Twardowski, originellement publiée à Vienne en 1892, est ici traduite en français pour la première fois. L'auteur y offre une exégèse des expressions "clara et distincta ... [more ▼]

La dissertation doctorale de Twardowski, originellement publiée à Vienne en 1892, est ici traduite en français pour la première fois. L'auteur y offre une exégèse des expressions "clara et distincta perceptio" et "clara et distincta idea" chez Descartes, en assignant à la perception et à l'idée le rôle qui leur revient dans la théorie cartésienne de la connaissance. [less ▲]

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See detailPsychopathologie du sens commun
Englebert, Jérôme ULiege; Recchia, Fabio ULiege

Book published by Cercle Herméneutique (Le) (2018)

Traduction en français et présentation de "Psicopatologia del senso commune" de Giovanni Stanghellini.

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See detailFrom Ontology to Psychoanalysis. Benussi and Musatti on the Concept of Mental Reality
Boccaccini, Federico ULiege

in Meinong Studies / Meinong Studien (2018), 9

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See detailUnravelling the ‘ingredients’ of energy consumption: Exploring home-related practices in Belgium
Maréchal, Kevin ULiege; Holzemer, Laurence

in Energy Research & Social Science (2018), 39(May 2018), 19-28

To look at energy consumption through a different lens, we have developed the conceptual framework of habitual practices. The objective of the present paper is to propose an empirical application of this ... [more ▼]

To look at energy consumption through a different lens, we have developed the conceptual framework of habitual practices. The objective of the present paper is to propose an empirical application of this framework, with the aim of unravelling the constitutive ‘ingredients’ of energy-consuming practices. Therefore, we investigate whether discussing the relationship of people with their homes could help circumventing the methodological difficulties that inevitably arise when trying to approach less tangible (albeit crucial) elements such as norms and attached meanings. The empirical material comes from group conversations where participants discussed the extent to which a home has to be practical, comfortable and convivial in connection with a series of elements. The results confirm that this methodological setting generated useful insights for a finer understanding of energy-consuming practices and their underlying drivers. A related crucial finding is the role of key appliances – those with more contrasted use and attached meanings – which appear to mediate the interplay between comfort, conviviality, and practicality. A promising avenue for future research would thus be to further investigate the role of those key appliances as potential markers of wider tendencies in energy consumption and useful for designing segmentation strategies. [less ▲]

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See detailL'Oeil de la mouche d'André-Joseph Dubois
Dechene, Antoine ULiege

in Deux siècles au service des sciences humains: contributions de l'Université de Liège (1817-2017) (2018)

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See detailUn Laboratoire belge du droit international (1869-1940). Théories, pratiques et incarnations
Genin, Vincent ULiege

Book published by Bruylant (2018)

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See detailGalien et les supports d’écriture : à propos d’un passage du Commentaire à Hippocrate, Officine du médecin (Préface, XVIII 2.630.12-16 Kühn)
Marganne, Marie-Hélène ULiege

in Hernández Muñoz, Felipe G.; Martínez Manzano, Teresa (Eds.) Del manuscrito antiguo a la edición crítica de textos griegos. Homenaje a la Profª Elsa García Novo (2018)

Based on a comparative analysis of manuscripts Parisinus gr. 1849 and Marcianus gr. Z. 279 (coll. 0705), and of parallel passages in Galen's works, the present study suggests an emendation to a passage of ... [more ▼]

Based on a comparative analysis of manuscripts Parisinus gr. 1849 and Marcianus gr. Z. 279 (coll. 0705), and of parallel passages in Galen's works, the present study suggests an emendation to a passage of the In Hippocratis De Officina Medici Commentarii (Preface, XVIII 2.630.12-16 Kühn), which deals with ancient works by Hippocrates that, at Galen's time, actually existed in the form of papyrus or parchment bookrolls. [less ▲]

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See detailLes systèmes électoraux de la Belgique. 2e édition
Bouhon, Frédéric ULiege; Reuchamps, Min

Book published by Bruylant (2018)

Il s'agit de la seconde édition d'un ouvrage collectif publié pour la première fois en 2012 qui propose une étude multidisciplinaire des élections en Belgique.

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See detailDeux siècles au service des Sciences humaines. L’Université de Liège dans l’arène scientifique internationale (1817-2017)
Genin, Vincent ULiege

Book published by Presses Universitaires de Liège (2018)

Detailed reference viewed: 35 (2 ULiège)