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See detailElectrode materials for Li/Na-ion batteries: Improving electrochemical performance through carbon addition during synthesis
Mahmoud, Abdelfattah ULiege; Karegeya, Claude; Eshraghi, Nicolas ULiege et al

Poster (2017, October 12)

Lithium-ion batteries have been widely applied as a power source for portable and stationary energy storage systems. Na-ion batteries are considered to be an alternative to Li-ion batteries owing to the ... [more ▼]

Lithium-ion batteries have been widely applied as a power source for portable and stationary energy storage systems. Na-ion batteries are considered to be an alternative to Li-ion batteries owing to the natural abundance of sodium. New electrode materials are required to increase the energy density of Li/Na-ion batteries. In this study, we show that the addition of the carbon sources during the synthesis leads to control the particles size and morphology and improve their conductivity properties that enhance the electrochemical performance [1-5]. In order to study the effect of the carbon on the structural, morphological and electrochemical properties of the prepared materials by a spray-drying [1-3] or hydrothermal methods [4, 5]. The crystal and local structure were analyzed by XRD and Mössbauer spectroscopy. The morphological properties were characterized by SEM and TEM. The carbon content was determined by TG/TDA and carbon analyzer. The electrochemical properties were studied by impedance spectroscopy and galvanostatic cycling in lithium cells. Finally, the reaction mechanism during cycling was investigated using operando XRD technique. 1- A. Mahmoud, S. Caes, M. Brisbois, R.P. Hermann, L. Berardo, A. Schrijnemakers, C. Malherbe, G. Eppe, R. Cloots, B. Vertruyen, F. Boschini, Spray-drying as a tool to disperse conductive carbon inside Na2FePO4F particles by addition of carbon black or carbon nanotubes to the precursor solution, J. Solid State Electrochem. (2017) 1–10. 2- N. Eshraghi, S. Caes, A. Mahmoud, R. Cloots, B. Vertruyen, F. Boschini, Sodium vanadium (III) fluorophosphate/carbon nanotubes composite (NVPF/CNT) prepared by spray-drying: good electrochemical performance thanks to well-dispersed CNT network within NVPF particles, Electrochim. Acta, 228 (2017) 319–324. 3- M. Brisbois, S. Caes, M-T. Sougrati, B. Vertruyen, A. Schrijnemakers, R. Cloots, N. Eshraghi, R-P. Hermann, A. Mahmoud, F. Boschini, Na2FePO4 F/multi-walled carbon nanotubes for lithium-ion batteries: Operando Mössbauer study of spray-dried composites, Solar Energy Materials & Solar Cells 148 (2016) 67-72. 4- C. Karegeya, A. Mahmoud, B. Vertruyen, F. Hatert, R.P. Hermann, R. Cloots, F. Boschini, One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries, J. Solid State Chem.253 (2017) 389–397. 5- C. Karegeya, A. Mahmoud, R. Cloots, B. Vertruyen, F. Boschini, Hydrothermal synthesis in presence of carbon black: Particle-size reduction of iron hydroxyl phosphate hydrate for Li-ion battery, Electrochimica Acta. Electrochim. Acta 250 (2017) 49–58. [less ▲]

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See detailAux frontières du réel : immersion et jeu vidéo
Dozo, Björn-Olav ULiege; Barnabé, Fanny ULiege; Delbouille, Julie ULiege et al

Conference given outside the academic context (2017)

« Etre immergé dans le jeu », « être plongé au coeur de l'histoire », « on s’y croirait » : autant d’expressions qui désignent ce moment où la frontière entre réel et virtuel semble s’effacer. Dans le ... [more ▼]

« Etre immergé dans le jeu », « être plongé au coeur de l'histoire », « on s’y croirait » : autant d’expressions qui désignent ce moment où la frontière entre réel et virtuel semble s’effacer. Dans le contexte du jeu vidéo, le terme « immersion » est très souvent employé (que ce soit par les joueurs, par les développeurs mais aussi par les scientifiques), mais que signifie-t-il exactement ? Le jeu nous coupe-t-il vraiment de la réalité ? Cette conférence reviendra sur les différentes façons de concevoir l'immersion, et sur leurs implications sur notre compréhension de la relation entre le joueur et le jeu. [less ▲]

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See detailPrévention et résolution des conflits
Caprasse, Olivier ULiege; Léonard, Laura ULiege

in Caprasse, Olivier (Ed.) Joint Ventures : Questions choisies de droit belge et international (2017, October 12)

Detailed reference viewed: 32 (2 ULiège)
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See detailSize and Value Matter But Not the Way You Thought
Lambert, Marie ULiege

Conference (2017, October 12)

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See detailMOOC et formation professionnelle : une approche par les capacités
Orianne, Jean-François ULiege

Conference (2017, October 12)

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Peer Reviewed
See detailL’auto-évaluation dans l’application des exceptions en droit économique de l’UE : plusieurs acteurs, nouveaux risques ?
Van Cleynenbreugel, Pieter ULiege

Conference (2017, October 12)

In this presentation, I will analyse the role of self-evaluation techniques in EU internal market and competition law.

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See detailIntramolecular continuous-flow strategy towards methylphenidate (Ritalin) hydrochloride
Gerardy, Romaric ULiege; Winter, Marc; Vizza, Alessandra et al

Poster (2017, October 12)

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See detailImpact des pesticides et autres intrants illégaux et contrefaits sur l'économie du secteur horticole des pays ACP
Schiffers, Bruno ULiege

Conference given outside the academic context (2017)

Detailed reference viewed: 31 (0 ULiège)
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See detailAdvanced porosity-based models to assess the influence of urban layouts on inundation flows and impact of urban evolution on flood damage
Bruwier, Martin ULiege

Doctoral thesis (2017)

Worldwide, flood risk is expected to increase over the 21st century due to the combined effect of climate and land use changes. However, while the impact of climate change on future flood risk was ... [more ▼]

Worldwide, flood risk is expected to increase over the 21st century due to the combined effect of climate and land use changes. However, while the impact of climate change on future flood risk was extensively studied, the effects of urbanization remain unclear. The goal of this PhD thesis is to contribute to a better understanding of the influence of future urban development on changes in inundation flows as well as on the related damage. First, an original porosity-based model was developed, which enables efficient computation of urban flooding. It uses anisotropic porosity parameters to reproduce the influence of subgrid-scale obstacles on the flow. An original merging technique was implemented to optimize the computational efficiency in the presence of low values of the storage porosity parameter. Compared to a standard inundation model, the developed model enables speedup factors of the order of 100, while keeping the error on the flow variables at a few percent. Second, we systematically investigated how the layout of buildings located in floodplains influences the inundation characteristics for a long-duration flood scenario. The anisotropic porosity-based model was used to compute the flow variables for 2,000 alternative urban patterns. Correlations between the computed water depths and the urban characteristics reveal which features of the layout of buildings influences most the severity of urban flooding. In particular, the results suggest how the hydraulic effect of new urban development can be effectively mitigated by a suitable location of the buildings preserving a higher flow conveyance at the district-scale. This result provides guidance for more flood-proof urban developments. Finally, we evaluated the evolution of future flood damage as a result of urbanization along all the main rivers in the Walloon region, Belgium. The study was conducted at the regional level using detailed hydraulic results (resolution of 2 to 5 m). Despite high uncertainties in the considered urbanization scenarios, involving both urban expansion and densification, robust conclusions could be drawn, such as the overwhelming influence of banning new developments in flood-prone areas compared to the other tested facets of urban planning policy. [less ▲]

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See detailRelationship between brain activity and ocular movements during wakefulness and drowsiness
François, Clémentine; Wertz, Jérôme; Verly, Jacques ULiege

Poster (2017, October 11)

Detailed reference viewed: 25 (7 ULiège)
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See detailDusp3 deletion in mice promotes experimental lung tumour metastasis in a macrophage dependent manner
Vandereyken, Maud; Jacques, Sophie; Van Overmeire, Eva et al

in PLoS ONE (2017)

Vaccinia-H1 Related (VHR) dual-specificity phosphatase, or DUSP3, plays an important role in cell cycle regulation and its expression is altered in several human cancers. In mouse model, DUSP3 deletion ... [more ▼]

Vaccinia-H1 Related (VHR) dual-specificity phosphatase, or DUSP3, plays an important role in cell cycle regulation and its expression is altered in several human cancers. In mouse model, DUSP3 deletion prevents neo-angiogenesis and b-FGF-induced microvessel out- growth. Considering the importance of angiogenesis in metastasis formation, our study aimed to investigate the role of DUSP3 in tumour cell dissemination. Using a Lewis Lung carcinoma (LLC) experimental metastasis model, we observed that DUSP3-/- mice devel- oped larger lung metastases than littermate controls. DUSP3-/- bone marrow transfer to lethally irradiated DUSP3+/+ mice was sufficient to transfer the phenotype to DUSP3+/+ mice, indicating that hematopoietic cells compartment was involved in the increased tumour cell dissemination to lung tissues. Interestingly, we found a higher percentage of tumour- promoting Ly6Cint macrophages in DUSP3-/- LLC-bearing lung homogenates that was at least partially due to a better recruitment of these cells. This was confirmed by 1) the pres- ence of higher number of the Ly6Bhi macrophages in DUSP3-/- lung homogenates and by 2) the better migration of DUSP3-/- bone marrow sorted monocytes, peritoneal macrophages and bone marrow derived macrophages (BMDMs), compared to DUSP3+/+ monocytes, macrophages and BMDMs, in response to LLC-conditioned medium. Our study demon- strates that DUSP3 phosphatase plays a key role in metastatic growth through a mechanism involving the recruitment of macrophages towards LLC-bearing lungs. [less ▲]

Detailed reference viewed: 29 (11 ULiège)
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See detailDevelopment of functionalized materials through sol-gel route for applications in catalysis and surface protection
Léonard, Géraldine ULiege

Doctoral thesis (2017)

In this work, materials have been produced by sol-gel route. This synthesis way has been used for immobilization on a support of a function focused on green chemistry. The different functions are related ... [more ▼]

In this work, materials have been produced by sol-gel route. This synthesis way has been used for immobilization on a support of a function focused on green chemistry. The different functions are related with different applications that allow to illustrate the versatility and the flexibility of this sol-gel process. The two applications are: - Photocatalysis: Synthesis of material with photocatalytic property or with an additional property - Cyclocarbonation: Synthesis of an immobilized catalyst for polyurethane production through a green process The first application concerns the use of a photocatalyst that allows to degrade volatile organic compounds (VOC). The main photocatalyst is TiO2. It has been studied as a powder or as a film deposited on a support. A comparison of these two shapes has shown that an identical photocatalyst can have different performances depending on the final shape. A catalyst must be considered in its totality and with its environment rather than as a chemical composition only. To increase the photocatalyst performances, modifications have been added as the Zn doping to increase the photocatalytic activity and the superhydrophilicity. These new photocatalysts have been compared with pure ZnO and bilayer films composed of TiO2 and of ZnO. Different photocatalytic tests have been performed and depending on the test the best photocatalyst was different. Then, to increase the economic interest, some dopant have been used. In addition of the improvement of the photocatalytic activity and superhydrophilicity, theses dopants add a new property such as electrical conductivity and anticorrosion. First, metallic silver has been incorporated to add antistatic property and to increase the photocatalytic activity. The photocatalytic property has been improved, superhydrophilicity has been kept but no antistatic property was observed. Multiwall carbon nanotubes (MWCNTs) have been tested with TiO2 to increase the electrical conductivity. This doping is efficient because MWCNTs increase the conductivity, the photocatalytic activity and maintain the superhydrophilicity. In addition, anticorrosive property has been observed on stainless steel in a preliminary study with the MWCNTs incorporation. The second study is focused on the heterogeneous cyclocarbonation catalyst synthesis to produce, in fine, polyurethane. The catalyst was immobilized on different matrices that are inert from catalytic point of view but that have a potential activator effect. First, with the preselected catalyst, different supports have been investigated. The comparison between the supports has highlighted the activator effect and the texture influence (accessibility of the active sites) on cyclocarbonation yields. Then, with the optimal matrix, different catalysts from a same family have been grafted to choose the best catalyst. Therefore, it has been possible to define the best catalyst and the best support. With this combination, a kinetic study has been performed to determine the best experimental conditions to produce cyclocarbonates. [less ▲]

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See detailReturn to play after groin injury
Kaux, Jean-François ULiege; Delvaux, François ULiege; LEHANCE, Cédric ULiege et al

Conference (2017, October 10)

Detailed reference viewed: 26 (3 ULiège)
See detailL'Intelligibilité de la pratique. Althusser, Foucault, Sartre
Oulc'hen, Hervé ULiege

Book published by Presses Universitaires de Liège (2017)

L’« Homme » ou la « structure », la « philosophie du sujet » ou la « philosophie du concept » : ces oppositions balisées dans le cadre de la « querelle de l’humanisme » ont la dent dure. Elles contribuent ... [more ▼]

L’« Homme » ou la « structure », la « philosophie du sujet » ou la « philosophie du concept » : ces oppositions balisées dans le cadre de la « querelle de l’humanisme » ont la dent dure. Elles contribuent à surdéterminer la manière dont nous héritons, aujourd’hui encore, de la vie intellectuelle des années soixante. Ce livre se situe délibérément après cette querelle : à rebours des polémiques convenues et des dialogues de sourds, il propose une reconstruction dialogique du problème de la pratique et de son primat supposé sur la théorie, comme enjeu commun à trois auteurs réputés incompatibles : Althusser, Foucault et Sartre. Privilégiant le caractère intempestif des thèses à la systématicité des œuvres, l’ouvrage suit le fil conducteur des rapports entre pratique et structure, prenant la forme d’une « théorie des ensembles pratiques ». Le dialogue ainsi reconstruit accorde une importance toute particulière à la critique par Althusser des philosophies de la praxis constituante – parmi lesquelles la Critique de la raison dialectique de Sartre occupe une place majeure – au profit d’une analyse structurale des pratiques constituées. Ce geste althussérien a un coût, qui consiste à écarter l’ancrage historique et empirique des pratiques au profit d’une théorie de l’histoire comme « procès sans sujet ». Foucault et Sartre se démarquent nettement du traitement althussérien de l’intelligibilité des pratiques. Il s’agit pour eux de sonder l’intelligibilité des pratiques à même le concret : celui des archives de pratiques passées chez Foucault, celui de la dialectique comme logique de l’action en cours chez Sartre. Contre l’idée galvaudée d’un Sartre vieillissant parmi ses contemporains, s’ouvre alors la possibilité d’un véritable dialogue entre Foucault, Sartre, et les sciences sociales sur la question d’une histoire politique de la vérité, qui contribue à remanier en profondeur les rapports entre théorie et pratique. [less ▲]

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See detailLa remédiation numérique des savoirs critiques : enjeux formels et heuristiques
Provenzano, François ULiege; Lapointe, Olivier; Mayeur, Ingrid ULiege

Conference (2017, October 10)

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See detailOpen Geodata
Minet, Julien ULiege

Scientific conference (2017, October 10)

Detailed reference viewed: 19 (7 ULiège)
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See detailSCENIC: single-cell regulatory network inference and clustering
Aibar, Sara; González-Blas, Carmen Bravo; Moerman, Thomas et al

in Nature Methods (2017), 14

We present SCENIC, a computational method for simultaneous gene regulatory network reconstruction and cell-state identification from single-cell RNA-seq data (http://scenic.aertslab.org). On a compendium ... [more ▼]

We present SCENIC, a computational method for simultaneous gene regulatory network reconstruction and cell-state identification from single-cell RNA-seq data (http://scenic.aertslab.org). On a compendium of single-cell data from tumors and brain, we demonstrate that cis-regulatory analysis can be exploited to guide the identification of transcription factors and cell states. SCENIC provides critical biological insights into the mechanisms driving cellular heterogeneity. [less ▲]

Detailed reference viewed: 18 (5 ULiège)