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See detailUnderwater world: the end of the myth
Parmentier, Eric ULiege

Conference (2017, October)

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See detailRecent Evolutions and Trends in the Use of Computer Aided Chemical Engineering for Educational Purposes at the University of Liège
Léonard, Grégoire ULiege; Belboom, Sandra ULiege; Toye, Dominique ULiege et al

in Computer Aided Chemical Engineering (2017)

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies ... [more ▼]

The present paper addresses the evolution and perspectives in the teaching of CAPE methods in the Department of Chemical Engineering at the University of Liège. The transition that happened in the 90ies with the arrival of commercial software is highlighted, as the learning outcomes evolved from the ability of building programs to solve chemical engineering problems towards the ability to use complex commercial software and to understand their limitations. Moreover, CAPE methods were extended to non-dedicated CAPE courses, which is illustrated here by the goals and challenges of their use in courses like “Reactor Engineering” and “Life Cycle Analysis”. It was observed that students sometimes assume that CAPE softwares provide straightforward and trustworthy solutions without the need of understanding their mathematical bases and assumptions. Thus, solutions to make students aware of these limitations are proposed, including the creation of an integrated project focussing on complex multi-disciplinary issues, evidencing the need for critical input from the operator. [less ▲]

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See detailHighlights from the Organic and Biological Analytical Chemistry Group (OBiAChem)
Focant, Jean-François ULiege

Scientific conference (2017, October)

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See detailSoil Microbial Properties and Nutrients Content Under Exotic and Native Tree Species in Southern Rwanda
Rwibasira, Peter; Naramabuye, François Xavier; Nsabimana, Donat et al

Conference (2017, October)

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See detailThe role of soil microbial diversity and activity in ecosystem functioning
Carnol, Monique ULiege

Conference (2017, October)

Soil microorganisms and soil organic matter availability regulate soil quality and fertility. Through their activity in biogeochemical cycling processes, soil microorganisms decompose soil organic matter ... [more ▼]

Soil microorganisms and soil organic matter availability regulate soil quality and fertility. Through their activity in biogeochemical cycling processes, soil microorganisms decompose soil organic matter and thus regulate nutrient availability and primary production. Landuse changes, such as a shift from forest to agricultural land, as well as a change in tree species composition, can modify microbial diversity and activity and consequently ecosystem funcitoning. Some parameters can be used as biological indicators, relating land use management to soil functioning and ecosystem services. New molecular tools allow now an in-depth investigation of the role of soil microbial diversity in ecosystem functioning. I will adress biogeochemical cycling processes and their relation to ecosystem functioning, with particular emphasis on forest ecosystems. Examples will be drawn from recent research projects investigating the links between tree species, tree species diversity, and soil microbial biomass, diversity and activity in temperate and tropical forests. [less ▲]

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See detailPrise en charge des tendinopathies en pratique générale
Sauvant, Céline; Kaux, Jean-François ULiege

in La Revue de la Médecine Générale (2017), 346

Tendinopathies can develop in several stages. Different therapeutic means are at our disposal. The continuum model, proposed by Cook and Purdam, provides an understanding of pathophysiology and adapts the ... [more ▼]

Tendinopathies can develop in several stages. Different therapeutic means are at our disposal. The continuum model, proposed by Cook and Purdam, provides an understanding of pathophysiology and adapts the therapeutic strategy to achieve optimal recovery and limitation of recurrences. [less ▲]

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See detailFish habitat selection in a large hydropeaking river: Strong individual and temporal variations revealed by telemetry
Capra, Hervé; Plichard, Laura; Bergé, Julien et al

in Science of the Total Environment (2017), 578

Modeling individual fish habitat selection in highly variable environments such as hydropeaking rivers is required for guiding efficient management decisions. We analyzed fish microhabitat selection in ... [more ▼]

Modeling individual fish habitat selection in highly variable environments such as hydropeaking rivers is required for guiding efficient management decisions. We analyzed fish microhabitat selection in the heterogeneous hydraulic and thermal conditions (modeled in two-dimensions) of a reach of the large hydropeaking Rhône River locally warmed by the cooling system of a nuclear power plant. We used modern fixed acoustic telemetry techniques to survey 18 fish individuals (five barbels, six catfishes, seven chubs) signaling their position every 3 s over a three-month period. Fish habitat selection depended on combinations of current microhabitat hydraulics (e.g. velocity, depth), past microhabitat hydraulics (e.g. dewatering risk or maximum velocities during the past 15 days) and to a lesser extent substrate and temperature. Mixed-effects habitat selection models indicated that individual effects were often stronger than specific effects. In the Rhône, fish individuals appear to memorize spatial and temporal environmental changes and to adopt a “least constraining” habitat selection. Avoiding fast-flowing midstream habitats, fish generally live along the banks in areas where the dewatering risk is high. When discharge decreases, however, they select higher velocities but avoid both dewatering areas and very fast-flowing midstream habitats. Although consistent with the available knowledge on static fish habitat selection, our quantitative results demonstrate temporal variations in habitat selection, depending on individual behavior and environmental history. Their generality could be further tested using comparative experiments in different environmental configurations. [less ▲]

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See detailThe influence of environmental factors on the upstream movements of rheophilic cyprinids according to their position in a river basin
Benitez, Jean-Philippe ULiege; Ovidio, Michaël ULiege

in Ecology of Freshwater Fish (2017)

Throughout their lives, fish accomplish frequent movements between functional habitats that are often triggered by environmental signals. We aimed to determine if rheophilic cyprinids (barbel, Barbus ... [more ▼]

Throughout their lives, fish accomplish frequent movements between functional habitats that are often triggered by environmental signals. We aimed to determine if rheophilic cyprinids (barbel, Barbus barbus and chub Squalius cephalus), living in different places of the same river basin, may develop similar movement periodicities and react identically to environmental cues to carry out their spawning migration. We used the capture data of three modern fish passes that were monitored continuously during three consecutive years (2010 to 2012) in three rivers of the Meuse basin in Belgium. We captured 418 individuals at adult stage, and the capture number per species was greater (80%) in spring (during the spawning migration period). The spawning migration of the barbel occurred earlier (median = 122nd day of the year) and at lower temperatures (median = 14.5°C) in the lowland rivers compared to the upland river (140th day of the year and 18.4°C). For the barbel, migration initiation differed depending on the river but finished under similar environmental conditions. In contrast, for the chub, no significant difference between rivers was observed regarding spawning migration periodicity and environmental cues. Within the same river basin, rheophilic cyprinids demonstrate flexibility in their responses to environmental variables and may optimise the start date of migration to spawning grounds depending on their local environment and individual experiences. This phenomenon was more pronounced in the barbel, which has more specific ecological requirements. [less ▲]

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See detailA Simulator to Explore Tarification Designs for Distribution Networks
Manuel de Villena Millan, Miguel ULiege; Gautier, Axel ULiege; Fonteneau, Raphaël ULiege et al

E-print/Working paper (2017)

This paper introduces a computational tool to help assess the impact of regulation policies within distribution net- works in the deployment of distributed renewable electricity generation. This tool is a ... [more ▼]

This paper introduces a computational tool to help assess the impact of regulation policies within distribution net- works in the deployment of distributed renewable electricity generation. This tool is a comprehensive multi-agent simulator capable of handling the interaction between the users of a distribution network and their distribution system operator. With this simulator, it is possible to address the different regulatory constraints encountered by distribution system operators, for any regulation policy. In the simulator, we model individual electricity consumers as rational agents, who may invest in optimised distributed renewable energy installations, if they are cost-efficient compared to the network tariff. By modelling the cost recovery scheme of the distribution system operator, the simulator then computes the evolution of the network tariff in response to a change in the consumption and generation of the consumers in the distribution network, due to the deployment of distributed generation. The simulator is illustrated with various regulation policies. [less ▲]

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See detailNew low electron flux facility in the 0 to 3.5 MeV range for the study of induced signal in JUICE instruments: UVS and MAJIS measurements
Carapelle, Alain ULiege; Grodent, Denis ULiege; Langevin, Yves et al

Poster (2017, October)

We designed and built a new test facility to investigate signal induced by electrons in the 0-3.5 MeV in the JUICE UVS and MAJIS instruments. The facility uses radioisotopes sources to produce low flux of ... [more ▼]

We designed and built a new test facility to investigate signal induced by electrons in the 0-3.5 MeV in the JUICE UVS and MAJIS instruments. The facility uses radioisotopes sources to produce low flux of electrons (< 6000 electrons/cm².s). We present the facility, its capabilities and the results of measurements on UVS and MAJIS. [less ▲]

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See detailNANO-STORE RETAILERS’ DISTRIBUTION SYSTEM MANAGEMENT IN EMERGING COUNTRIES
Sabiri, Asmaa; Riane, Fouad; Limbourg, Sabine ULiege

Scientific conference (2017, October)

Emerging megacities are still abounded with traditional distribution channels. These retail formats need to be visited and supplied very frequently, which turns to be costly and time consuming. In this ... [more ▼]

Emerging megacities are still abounded with traditional distribution channels. These retail formats need to be visited and supplied very frequently, which turns to be costly and time consuming. In this paper, we address an optimization problem for supplying nanostores (or high frequency stores), while combining districting problem and an altered traveling salesman problem. We present a reallife case study where a company tries to build an effective strategy to cover and supply its nanostores’ network. The problem of concern is modeled as an assignment problem, combined with side constraints regarding disruption of pre-assignments and profit potential balance. The results show that the objective function gives better solution when it’s a combination of both profit and workload balance. [less ▲]

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See detailDrainage vaginal spontané d'un abcès appendiculaire chez une fillette de 7 mois.
BRICHANT, Géraldine ULiege; FRERE, Julie ULiege; El Hachemi, Mounia et al

Poster (2017, October)

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See detailThe Paleoproterozoic fossil record: Implications for the evolution of the biosphere during Earth's middle-age
Javaux, Emmanuelle ULiege; lepot, kevin

in Earth-Science Reviews (2017)

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See detailOn the phase behaviour of oxetane-CO2 and propargylic alcohols-CO2 binary mixtures by in situ infrared micro-spectrometry
Zaky, Mohamed; Boyaval, Amélie ULiege; Grignard, Bruno ULiege et al

in Journal of Supercritical Fluids (2017), 128

The phase behaviour of carbon dioxide/propargylic alcohols and carbon dioxide/oxetanes mixtures has been investigated using in-situ FTIR microspectrometry that allows us determining the evolution of the ... [more ▼]

The phase behaviour of carbon dioxide/propargylic alcohols and carbon dioxide/oxetanes mixtures has been investigated using in-situ FTIR microspectrometry that allows us determining the evolution of the concentration of each component in the liquid phase as a function of temperature and pressure. It was at the same time possible to look inside the cell and to visualize the expansion of the liquid phase during the increase of the pressure. The measurements were performed at three different temperatures (40, 70 and 100◦C) for pressures ranging between 0.1 and 15 MPa. Propargylic alcohol (PA), 2-methyl-3-butyn-2-ol (MBOL), 3-butyn-1-ol (BOL) and trimethylene oxide (TMO) were selected as these molecules are used in the synthesis of cyclic or polycarbonates by coupling with CO2. Thus, we determined the CO2 sorption and the concentration of the substrate in the liquid phase. Thanks to these measurements, we established the pressure-composition phase diagram for the liquid phase of these substrate/CO2 binary mixtures. [less ▲]

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See detailDu trou de ver au trou de serrure...
Gernay, Delphine; Moukhaiber, Sophie; Maenhout, Marine et al

in Revue des Hôpitaux de Jour Psychiatriques et des Thérapies Institutionnelles (2017), 19

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See detailSans titre (postface)
Dejasse, Erwin ULiege

in Muñoz, José; Sampayo, Carlos (Eds.) Le Bar à Joe (édition intégrale) (2017)

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See detailPraxis et anti-praxis des revues intellectuelles de l’immédiat après-guerre
Franck, Thomas ULiege

in Argumentation et Analyse du Discours (2017), 19

The sociodiscursive analysis of post-war intellectual reviews’ editorials, especially Socialisme ou Barbarie, gives rise to rhetorical and argumentative interpretations determined by the socio-historical ... [more ▼]

The sociodiscursive analysis of post-war intellectual reviews’ editorials, especially Socialisme ou Barbarie, gives rise to rhetorical and argumentative interpretations determined by the socio-historical context, by reviews’ editorial features and by the Marxist discursive formation. On the one hand the polemic dimension of these discourses (structured by a logic of ideological dispute), the reproduction of the fixed formula “marxisme véritable” and the use of ironical “îlots textuels” (parts of discourse that quote words of the opponent to discredit him) are all rhetorical examples of the influence of an intellectual discourse’s instituted state. On the other hand the militant ethos developed by Socialisme ou Barbarie and the presupposition of the link between Stalinism and State capitalism are parts of a discursive innovation. This dialectical logic between a discursive determination and a power of innovation has to be studied from a materialist point of view. Thus the dialectical movement between a discursive creation – for example the militant activism of Socialisme ou Barbarie – and a discourse’s instituted state – for example the Marxist dogmatism – must be understood on the basis of different materialist notions. Also the notion of “group praxis” allows to overpass this movement between determination and innovation. Consequently the possibility arises to think the rhetorical particularities and the critical process of intellectual reviews. [less ▲]

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See detailClinical classification criteria for radicular pain caused by lumbar disc herniation: the radicular pain caused by disc herniation (RAPIDH) criteria
Genevay, Stéphane; Courvoisier, Delphine; Konstantinou, Kika et al

in Spine Journal (2017), 17(10), 1464-1471

BACKGROUND CONTEXT: Classification criteria are recommended for diseases that lack specific biomarkers to improve homogeneity in clinical research studies. Because imaging evidence of lumbar disc ... [more ▼]

BACKGROUND CONTEXT: Classification criteria are recommended for diseases that lack specific biomarkers to improve homogeneity in clinical research studies. Because imaging evidence of lumbar disc herniations (LDHs) may not be associated with symptoms, clinical classification criteria based on patient symptoms and physical examination findings are required. PURPOSE: This study aimed to produce clinical classification criteria to identify patients with radicular pain caused by LDH. STUDY DESIGN: The study design was a two-stage process. Phase 1 included a Delphi process and Phase 2 included a cohort study. PATIENT SAMPLE: The patient sample included outpatients recruited from spine clinics in five countries. OUTCOME MEASURES: The outcome measures were items from history and physical examination. MATERIALS AND METHODS: In Phase 1, 17 spine experts participated in a Delphi process to select symptoms and signs suggesting radicular pain caused by LDH. In Phase 2, 19 different clinical experts identified patients they confidently classified as presenting with (1) radicular pain caused by LDH, (2) neurogenic claudication (NC) caused by lumbar spinal stenosis, or (3) non-specific low back pain (NSLBP) with referred leg pain. Patients completed survey items and specialists documented examination signs. A score to predict radicular pain caused by LDH was developed based on the coefficients of the multivariate model. An unrestricted grant of less than US$15,000 was received from MSD: It was used to support the conception of the Delphi, data management, and statistical analysis. No fees were allocated to participating spine specialists. RESULTS: Phase 1 generated a final list of 74 potential symptoms and signs. In Phase 2, 209 patients with pain caused by LDH (89), NC (63), or NSLBP (57) were included. Items predicting radicular pain caused by LDH (p<.05) were monoradicular leg pain distribution, patient-reported unilateral leg pain, positive straight leg raise test <60° (or femoral stretch test), unilateral motor weakness, and asymmetric ankle reflex. The score had an AUC of 0.91. An easy-to-use weighted set of criteria with similar psychometric characteristics is proposed (specificity 90.4%, sensitivity 70.6%). CONCLUSIONS: Classification criteria for identifying patients with radicular pain caused by LDH are proposed. Their use could improve the homogeneity of patients enrolled in clinical research studies. [less ▲]

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