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See detailROOF STACKING: Learned Lessons from Architects
Amer Mahmoud, Mohamed ULg; Attia, Shady ULg

Report (2017)

Roof Stacking represents an approach to accommodate increasing population in the major cities around Europe, new agendas for urban densification emerge in response of finding sustainable solutions to use ... [more ▼]

Roof Stacking represents an approach to accommodate increasing population in the major cities around Europe, new agendas for urban densification emerge in response of finding sustainable solutions to use existing urban infrastructure in the most efficient ways. Several methods for urban densification are being proposed and seen in real life. One of those methods is roof stacking, which is defined as the added structure over the rooftop of an existing building to create one or more stories of living spaces. This report represents the results of conducted investigation on roof stacking method as a sustainable approach for urban densification. The aim of this report is to present a guideline for roof stacking construction approaches and methods and present the learned lessons through interviewing notable architects from different European countries who applied roof stacking. This report identifies the challenges and opportunities when applying roof stacking in addition to proposing recommended solution for the different obstacles that are faced when adding extensions on the rooftops. [less ▲]

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See detailAnisotropic modelling of Opalinus Clay behaviour: from triaxial tests to gallery excavation application
Bertrand, François ULg; Collin, Frédéric ULg

in Journal of Rock-Mechanics and Geotechnical Engineering (2017)

Deep repository in geological formations is the preferential solution considered by many countries to manage high-level nuclear wastes. In Switzerland, the Opalinus Clay is a candidate host rock. In this ... [more ▼]

Deep repository in geological formations is the preferential solution considered by many countries to manage high-level nuclear wastes. In Switzerland, the Opalinus Clay is a candidate host rock. In this context, in situ and laboratory tests are conducted on Opalinus Clay to demonstrate the feasibility of deep disposal in this argillaceous formation. This paper presents a constitutive model able to fit the experimental data obtained from some triaxial tests conducted by Jahns [1] on cores from bore hole Schlattingen SLA- 1. The elasto-plastic behaviour of Opalinus Clay is reproduced thanks to a Drucker-Prager model, taking into account the anisotropy behaviour of this sedimentary rock. The objective is to employ a single set of parameters representative of the material. In a second version of the model, the stress-dependency of the elastic properties and damage are taken into account. Finally, the parameters calibrated with experimental tests are used to simulate the excavation of a gallery with a second gradient approach. [less ▲]

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See detailExperimental design helps to optimize spray drying processes
Dellicour, Aline ULg; Cloots, Rudi ULg; Boschini, Frédéric ULg

Poster (2017, June)

Experimental design is necessary to identify major experimental parameters linked to a process in order to optimize it and reduce costs. It also helps to reduce the number of experiments and analyze data ... [more ▼]

Experimental design is necessary to identify major experimental parameters linked to a process in order to optimize it and reduce costs. It also helps to reduce the number of experiments and analyze data statistically. This work aims to present some possibilities of how experimental design may be applied in the field of pharmaceutical powders production by spray drying. Depending on the application, powders need particular size, morphology, purity, crystallinity or polymorphism. All these characteristics may be influenced by process parameters and should be controlled to reach pharmaceutical requirements. [less ▲]

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See detailDroit, artification et domination : Bourdieu, Duchamp et Pinoncelli
De Brogniez, Maxime ULg

Scientific conference (2017, June)

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See detailThe question of the methane increase though the retrieval of its isotopologues from FTIR ground-based observations
Bader, Whitney ULg; Strong, Kimberley; Walker, Kaley et al

Conference (2017, June)

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See detailQuantification of serum androstanediol glucuronide
LE GOFF, Caroline ULg

in Clinical Chemistry and Laboratory Medicine (2017, June)

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See detailReference interval determination for serum and urine aldosterone for healthy Belgian population
LE GOFF, Caroline ULg; Fabregat Cabello, Neus ULg; Huyghebaert, Loreen ULg et al

in Clinical Chemistry & Laboratory Medicine (2017, June)

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See detailComparison of cardiac biomarker fluctuation in runners of marathons, semi-marathons and untrained runners
LE GOFF, Caroline ULg; VRANKEN, Laura ULg; van Nueten, Jan et al

in Clinical Chemistry & Laboratory Medicine (2017, June)

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See detailLa nature, une nécessité symbolique et vitale
Lombard, David ULg

Article for general public (2017)

L’environnement est une préoccupation majeure de notre société, pourtant nombreux sont encore les indécis et trop peu nombreux sont ceux qui sont prêts à agir et à changer leurs habitudes pour améliorer ... [more ▼]

L’environnement est une préoccupation majeure de notre société, pourtant nombreux sont encore les indécis et trop peu nombreux sont ceux qui sont prêts à agir et à changer leurs habitudes pour améliorer la situation critique actuelle. Dans le présent article, j’aborderai, en utilisant le modèle nord-américain comme principale référence, l’évolution d’une représentation de la nature. D’abord vue comme nécessaire car symbolisant à la fois un nouveau continent et une nouvelle identité ensuite vue comme consommable, artificielle et enfin vue comme facultative. Afin de pallier cette dernière conception, parfois inconsciente, de la nature comme « accessoire », dont on pourrait se passer, et favoriser un mode de vie et une consommation écologiquement responsables, je terminerai par donner une série de pistes d’action exerçables aux niveaux individuel, collectif et sur les pouvoirs publics. [less ▲]

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See detailA Model Reduction Approach for Simulation of Long-term Voltage and Frequency Dynamics
Weckesser, Johannes ULg; Franz, Valeri; Grebe, Eckhard et al

in 12th IEEE PES PowerTech Conference 2017 (2017, June)

This paper presents a novel approach, which identifies a buffer zone around a given study system and replaces the external system with an equivalent. The aim is to obtain a reduced system, which is ... [more ▼]

This paper presents a novel approach, which identifies a buffer zone around a given study system and replaces the external system with an equivalent. The aim is to obtain a reduced system, which is suitable for assessment of long-term voltage and frequency dynamics in the study system. First, the proposed methodology ensures that all components, which are impacting the voltage profile of the study system, are included in the buffer zone. For that purpose, the propagation of reactive power changes from the boundary of the study system into the external system are used in a modified depth-first search algorithm to identify the buffer zone. Second, the external system is replaced with equivalents accounting for inertia and primary frequency control effects. The proposed method was successfully tested on a modified version of the ENTSO-E Dynamic Study Model. [less ▲]

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See detailGeant4 code for gamma spectrometry measurement: a toolkit for Nuclear, Medical, Astronomical and High Energy Physics
Guembou Shouop, Cébastien Joel ULg; Ndontchueng Moyo, Maurice; Nguelem Mekongtso, Eric J. et al

Scientific conference (2017, June)

In the Monte Carlo method, quantities of interest for the application are calculated through statistical sampling of interaction processes. Gamma spectroscopy is a widely used technique, well-illustrated ... [more ▼]

In the Monte Carlo method, quantities of interest for the application are calculated through statistical sampling of interaction processes. Gamma spectroscopy is a widely used technique, well-illustrated by the following list of examples: Environmental Radioactivity Monitoring, nuclear industry, geochemical investigation, and astrophysics. Most radioactive sources produce gamma rays, which are of various energies and intensities. Geant4 (for GEometry ANd Tracking) is a platform for the simulation of the passage of particles through matter, using Monte Carlo methods. The GEANT4 toolkit allows the simulation of the following physical processes: the photo-electrical effect, the Compton Effect, the electron-positron pairs generation and the Rayleigh diffusion. Our study shows the combination of gamma spectrometry, development of related Monte Carlo equation and the presentation of the Geant4 toolkit for gamma spectrometry simulation (simulation of the interaction of gamma photon through matter). It is clearly found, at the end of this study, that Monte-Carlo simulation is a useful, inexpensive alternative that also provides greater flexibility and gained time when determining the detector response and efficiency during an environmental monitoring. [less ▲]

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See detailEnhancing the sweetener erythritol productivity in Yarrowia lipolytica using metabolic engineering
Carly, Frédéric; Vandermies, Marie ULg; Nicaud, Jean-Marc et al

Conference (2017, June)

Erythritol (1,2,3,4-butanetetrol) is a four-carbon sugar alcohol used as sweeteners in food and beverage industry. It is most commonly generated from glucose via fermentation using osmophilic yeasts ... [more ▼]

Erythritol (1,2,3,4-butanetetrol) is a four-carbon sugar alcohol used as sweeteners in food and beverage industry. It is most commonly generated from glucose via fermentation using osmophilic yeasts. Yarrowia lipolytica is highly proficient at producing erythritol and can use raw glycerol instead of glucose as its main carbon source. Raw glycerol is a byproduct of the biodiesel industry, and it is a cheaper and more efficient carbon source than glucose when it comes to producing erythritol. To date, most studies seeking to improve erythritol production have used wild type strains or randomly generated mutants and have focused on optimizing the culture medium or culturing conditions. In this study, we demonstrated that metabolic engineering can be used to enhance the production of erythritol from glycerol. To this end, we constructed a set of eleven strains that overexpressed genes encoding key enzymes of either glycerol catabolism and erythritol synthesis pathway. For the best of our engineered strains, erythritol productivity in bioreactor was increased 78% relative to the wild type strain and maximum concentrations were obtained in 40% less time. [less ▲]

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See detailSniffing out the hypoxia volatile metabolic signature of Aspergillus fumigatus
Rees, Christiaan A; Stefanuto, Pierre-Hugues ULg; Beattie, Sarah R et al

in Journal of Breath Research (2017), 036003

Invasive aspergillosis (IA) is a life-threatening infectious disease caused by fungi from the genus Aspergillus, with an associated mortality as high as 90% in certain populations. IA-associated pulmonary ... [more ▼]

Invasive aspergillosis (IA) is a life-threatening infectious disease caused by fungi from the genus Aspergillus, with an associated mortality as high as 90% in certain populations. IA-associated pulmonary lesions are characteristically depleted in oxygen relative to normal lung tissue, and it has been shown that the most common causal agent of IA, Aspergillus fumigatus, must respond to lowoxygen environments for pathogenesis and disease progression. Previous studies have demonstrated marked alterations to the Aspergillus fumigatus transcriptome in response to low-oxygen environments that induce a ‘hypoxia response’. Consequently, we hypothesized that these transcriptomic changes would alter the volatile metabolome and generate a volatile hypoxia signature. In the present study, we analyzed the volatile molecules produced by A. fumigatus in both oxygen replete (normoxia) and depleted (hypoxia) environments via headspace solid-phase micro-extraction coupled to twodimensional gas chromatography-time-of-flight mass spectrometry. Using the machine learning algorithm random forest, we identified 19 volatile molecules that were discriminatory between the four growth conditions assessed in this study (i.e., early hypoxia (1 h), late hypoxia (8 h), early normoxia (1 h), and late normoxia (8 h)), as well as a set of 19 that were discriminatory between late hypoxia cultures and all other growth conditions in aggregate. Nine molecules were common to both comparisons, while the remaining 20 were specific to only one of two.Weassigned putative identifications to 13 molecules, of which six were most highly abundant in late hypoxia cultures. Previously acquired transcriptomic data identified putative biochemical pathways induced in hypoxia conditions that plausibly account for the production of a subset of these molecules, including 2,3-butanedione and 3-hydroxy-2-butanone. These two molecules may represent a novel hypoxia fitness pathway in A. fumigatus, and could be useful in the detection of hypoxia-associated A. fumigatus lesions that develop in established IA infections. [less ▲]

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See detailBusiness Models for Smart City – a means to achieve sustainability?
Bleus, Hélène ULg; Crutzen, Nathalie ULg

Scientific conference (2017, June)

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See detailUn trivial sport‐santé
Lombard, Gilles ULg; Cloes, Marc ULg

in Revue EP&S (2017), 375

L’évolution de la société est telle que la sédentarité et le nombre de personnes en surpoids ne font qu’augmenter. En touchant la quasi-totalité des jeunes, l’éducation physique se trouve en première ... [more ▼]

L’évolution de la société est telle que la sédentarité et le nombre de personnes en surpoids ne font qu’augmenter. En touchant la quasi-totalité des jeunes, l’éducation physique se trouve en première ligne pour agir. Toutefois, le temps hebdomadaire qui lui est imparti et le temps d’activité effectif dans une leçon ne peuvent être suffisants pour exercer un effet décisif sur leur santé. Il peut alors être intéressant que le professeur d’éducation physique endosse un rôle supplémentaire d’éducateur à la santé. Le principe est de faire acquérir les compétences (motrices, techniques, tactiques, etc.) prévues par le programme mais aussi et surtout, d’apporter aux élèves des informations importantes pour leur vie de citoyen, des idées, des astuces, des mises en garde qu’ils pourraient retenir et appliquer au quotidien. Ainsi la physical literacy (l’éducation de l’élève par le mouvement) et l’accountability (le fait d’amener un élément nouveau supplémentaire à l’élève lors de chaque cours) deviennent prioritaires donnant réellement à l’éducation physique l’ambition d’une formation de citoyens physiquement éduqués. Cela nécessite de faire évoluer les pratiques des enseignants et de faire que la dimension santé constitue un fil rouge tout au long de la scolarité des élèves. En effet, les approches liant santé et EPS reposent très souvent sur la motivation extrinsèque des élèves (points, sanction, évaluation certificative…) en contradiction avec l’ambition éducative visant « l’implication spontanée » des jeunes et le concept d’ancrage sociétal qui est actuellement privilégié dans certaines structures de formation. Nous avons donc envisagé un dispositif visant l’acquisition de connaissances théoriques en situation, avant, pendant ou après chaque leçon, au bénéfice de l’implication des élèves. [less ▲]

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See detail[18F]BPAM121: An AMPAR Modulator with Potential as a PET Probe
Manos-Turvey, Alexandra ULg; Lemaire, Christian ULg; Deverdenne, François et al

Poster (2017, June)

Detailed reference viewed: 20 (3 ULg)