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See detailVitamine D et Vitamin D Binding protein
VRANKEN, Laura ULiege

Conference (2017, September 28)

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See detailLe Stress Oxydant: arnaque ou biologie d'avenir?
LE GOFF, Caroline ULiege

Conference (2017, September 28)

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See detailLa critique dans l'université contemporaine. Responsabilité et complexité.
Bachelet, Jean-François ULiege

Conference (2017, September 28)

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See detailAltered antimicrobial peptide expression in HPV-related (pre)neoplastic lesions
Lebeau, Alizée ULiege

Conference (2017, September 28)

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See detailL’organisation du culte islamique en Belgique
Husson, Jean-François ULiege

Conference (2017, September 28)

This paper presents the current organisation of the Muslim community in the context of Islam as a recognised religion in Belgim. The Muslim representative body, mosques and imams and specific aspects ... [more ▼]

This paper presents the current organisation of the Muslim community in the context of Islam as a recognised religion in Belgim. The Muslim representative body, mosques and imams and specific aspects (chaplaincies, religious education,...) are also dealt with. [less ▲]

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See detailDébattre la mesure : l'engagement politique de Steve Reich
Orianne, Jean-François ULiege

Conference (2017, September 28)

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See detailProtective nature of nano-TiN coatings shaped by EPD on Ti substrates
Mendoza Gallego, Carlos ULiege; Gonzalez, Zoilo; Gordo, Elena et al

in Journal of the European Ceramic Society (2017)

The hardness and corrosion resistance of TiN coatings, processed by Electrophoretic Deposition (EPD) to cover polished and unpolished Ti substrates, have been evaluated. A deposition time of 5 min has ... [more ▼]

The hardness and corrosion resistance of TiN coatings, processed by Electrophoretic Deposition (EPD) to cover polished and unpolished Ti substrates, have been evaluated. A deposition time of 5 min has been enough to obtain a cohesive layer of 7–8 μm in thickness. The coatings were thermally treated in vacuum atmosphere at 1200 °C for 1 h with heating and cooling rates of 5 °C min−1. The surfaces have been covered homogeneously optimizing the properties of the Ti substrates. Uniform and dense TiN coatings have been obtained onto polished substrates, while on unpolished Ti the nitrogen diffuses toward the substrate, moderately dissolving TiN coating. The nanohardness values of the polished samples have been increased from 2.8–4.8 GPa up to 6.5–8.5 GPa. Besides, the corrosion current density has been reduced more than one order of magnitude obtaining a protective efficiency of 82%. These values have been compared with other works in literature where authors used complex and costly processing techniques, demonstrating the strong impact of the colloidal processing over the specific properties of the material. [less ▲]

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See detailA mathematical model of respiration under protective ventilation and extracorporeal CO2 removal therapy
Habran, Simon ULiege; Desaive, Thomas ULiege; MORIMONT, Philippe ULiege et al

Conference (2017, September 27)

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must ... [more ▼]

The aim of the present study is to build a mathematical model of the respiratory system connected to an extracorporeal CO2 removal device (ECCO2RD) to optimize the gas exchanges efficiency. The model must be simple enough to provide rapid solutions and to estimate specific parameters from available clinical data. But it also must be complex enough to be able to simulate the respiratory system when protective ventilation is used and when this system is assisted by an ECCO2RD. [less ▲]

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See detailDevelopment of nuclear SNP markers for the timber tracking of the African tree species Sapelli, Entandrophragma cylindricum
Blanc-Jolivet, Céline; Kersten, Birgit; Bourland, Nils et al

in Conservation Genetics Resources (2017)

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing ... [more ▼]

We describe the development of new nuclear SNP markers for the genetic timber tracking of the geographical origin of Sapelli, Entandrophragma cylindricum (Meliaceae). Restriction associated DNA sequencing (RADseq) of two reference individuals yielded 1131 putative SNPs. Among those, 131 were selected to design four MassARRAY multiplexes and screened at 178 individuals. Seventy-two loci were selected for further use in genetic tracking. [less ▲]

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See detailPhotosharing on flickr: a data source for assessing cultural values in urban landscapes
Ginzarly, Manal ULiege

Conference (2017, September 27)

The urban landscape is a stratification of natural, cultural, and socio-economic processes that shape it spatially and experientially over time. The different cultural values embedded in the tangible and ... [more ▼]

The urban landscape is a stratification of natural, cultural, and socio-economic processes that shape it spatially and experientially over time. The different cultural values embedded in the tangible and intangible attributes of the urban landscape are essential to its unique sense of place, and cultural identity. In the era of globalization, rapid urbanization, and unsustainable urban development, cultural heritage has been recognized as an enabler for sustainable development that adapts, and evolves through time with the changes occurring in the city, and at the same time maintains its identity, integrity, and continuity. In this context, UNESCO recommended the application of the Historic Urban Landscape (HUL) approach to the management of thoughtful change and the conservation of cultural heritage. According to the HUL approach cultural values should be taken as a starting point in urban management and development. It is important that decision makers and experts are aware of the potential and variety of cultural values present within exceptional, ordinary, and even deteriorated urban landscapes. In recent years we have witnessed rapid advances in social networking and photo-sharing communities that are generating big data including geographic information, photos, and commentaries. Our assumption is that the phenomenon of user-generated data from social media offers awareness about the dynamic social interactions within places, and express moments, experiences, practices, and identities contributing to the understanding of cultural values associated with the urban landscape. Accordingly, this paper extracts, analyses, and visualizes photos metadata of Tripoli, Lebanon published on Flickr for the application to the fields of urban management and conservation. [less ▲]

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See detailPoetics of Digital Comics
Crucifix, Benoît ULiege; Dozo, Björn-Olav ULiege; Rommens, Aarnoud

in The Comics Grid: Journal of Comics Scholarship (2017)

This special collection follows up on the transdisciplinary conference Poetics of the Algorithm held at the University of Liège (Belgium) in June 2016. Narrative today is undergoing a radical change in ... [more ▼]

This special collection follows up on the transdisciplinary conference Poetics of the Algorithm held at the University of Liège (Belgium) in June 2016. Narrative today is undergoing a radical change in its ‘source code’ as new technologies are changing the way texts are produced, distributed, viewed and read. Even though comics have originally been resistant to a sweeping digital translation, weary of a technological utopianism that did not bode well for its own specificities, cartoonists have increasingly adapted to this new media ecology, using it to reinvent their approach to comics making. A poetics of digital comics would aim at mapping out how comics respond to the deep technological change of the digital in complex ways, avoiding the pitfall of a new vs. old dichotomy and thus accounting for both its innovative forays into digital creation as well as its paradoxes, resistances, residues and returns. By bringing Francophone voices into English, this collection, under the editorial direction of Benoît Crucifix, Björn-Olav Dozo, Aarnoud Rommens and Ernesto Priego for The Comics Grid: Journal of Comics Scholarship, seeks to encourage international scholarship spanning from the cutting-edge of a ‘French comics theory’ that, in recent years, has paid increasing attention to digital comics. [less ▲]

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See detailLes expériences de mort imminente: le point de vue des neurosciences
Martial, Charlotte ULiege

Conference (2017, September 27)

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See detailA comparative study between sampling methods for soil litter arthropods in conserved tree plots and banana crop plantations in Rwanda
Nsengimana, Venuste ULiege; Kaplin, A. Beth; Frederic, Francis et al

in International Journal of Development and Sustainability (2017), 6(8), 900-913

The aim of this study was to compare trapping efficiency between Berlese-Tullgren funnels, pitfall traps and hand sorting sampling methods for soil litter arthropods. The study was carried out at the ... [more ▼]

The aim of this study was to compare trapping efficiency between Berlese-Tullgren funnels, pitfall traps and hand sorting sampling methods for soil litter arthropods. The study was carried out at the Arboretum of Ruhande and Rubona agricultural research station, in southern Rwanda. Biological indices indicated that pitfall traps collect a wide range of soil litter arthropod diversity, and chi-square test indicated the dependence between Berlese-Tullgren funnels and pitfall traps, and between pitfall traps and hand sorting. Z-test and univariate comparison indicated differences in means between tested sampling methods. The analysis of variance revealed that pitfall traps are less time consuming and the principal component analysis indicated that Formicidae is likely to be collected by pitfall traps and Berlese-Tullgren funnels, while Julidae, Porcellionidae and Geophilidae are likely to be collected by hand sorting. Research concluded that pitfall traps are more efficient than other studied sampling methods, but further studies should be conducted in other ecological zones, and different land uses in order to generate general information of these findings. [less ▲]

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See detailAbundance determination in massive stars: challenges for mixing processes
Cazorla, Constantin ULiege

Doctoral thesis (2017)

Massive stars, the most luminous stars, are the true “cosmic engines” of our Universe. They eject large quantity of material throughout their life, which strongly influences their evolutionary path as ... [more ▼]

Massive stars, the most luminous stars, are the true “cosmic engines” of our Universe. They eject large quantity of material throughout their life, which strongly influences their evolutionary path as well as their environment. An important feature of massive stars is their high rotational velocities that are either acquired at birth or due to the influence of a companion. Rotation is believed to transport nitrogen-rich and carbon/oxygen-poor material generated in the stellar core through the CNO cycle, to the surface. A way to test the e ciency of rotational mixing is to study the chemical composition at the surface of stars, in particular the fastest rotators. The incentive for this study was the discovery, in the context of the VLT- FLAMES Survey of Massive Stars, of fast rotators exhibiting an unenriched nitrogen composition at their surface, contrary to predictions from single-star evolutionary models including rotation. However, their multiplicity may a ect this conclusion, since both rotation and abundances can change as a result of binary interactions. In this work, we combined, for the first time, a detailed surface abundance analysis with a radial-velocity study to quantify the importance of binary e ects. This work was conducted for a sample of 40 bright, OB fast rotators in our Galaxy. Statistical tests and period-search techniques revealed that ≥ 40% of our targets whose multiplicity status can be probed, are binary or binary candidates. We derived the projected rotational velocity of our targets and model atmosphere codes were then used to derive stellar parameters and surface abundances of all sample stars. This abundance study revealed a correlation between the helium and nitrogen abundances of our targets, which is predicted by the rotational mixing theory. Finally, we compared our results to predictions of single-star evolutionary models. We found that 10 – 20% of our 40 targets exhibit no enhancement of the [N/O] abundance ratio, in line with results of the VLT-FLAMES Survey of Massive Stars. The properties of only half of our sample are explained by such models, and surprisingly we also uncovered a quite common large abundance of helium at the surface of our targets. Modifying the di usion coe cient in single-star models and models of non-rotating mergers did not reproduce simultaneously both the observed helium abundances and the [N/O] abundance ratios. Binary models considering a mass-transfer episode can, however, reproduce the [N/O] values of the majority of our targets and even the helium abundances of some of the most helium-enriched targets, but they cannot explain stars displaying little helium enrichment but high [N/O] values. In conclusion, we found that not every feature of massive stars can be explained by models, suggesting that they lack a physical ingredient and thus require further improvements. The second part of this thesis aimed at improving our knowledge of the X-ray emission of early B-type stars. We studied 11 such stars at high resolution thanks to two X-ray facilities, XMM-Newton and Chandra, doubling the number of B-stars analysed at high resolution. In many aspects, our study confirmed previous ones: early B-stars display rather narrow and unshifted lines arising from a warm (of typically 0.2 – 0.6 keV) plasma located at a few stellar radii over the stellar surface. We also found that abundances derived in the X-ray domain are in fair agreement with photospheric ones derived in the optical domain. Furthermore, most early B-stars are moderately bright X-ray emitters – though we also unexpectedly found that this X-ray emission varies, on short and/or long timescales, for half of our sample. A few stars display peculiar features: the presence of a very hot (1.6 – 4.4 keV) component and strong variations. These features suggest that the recorded X-ray emission may not be entirely linked to the B-stars, but could be contaminated by emission from a companion or an interaction with it. Indeed, in one case, HD 79351, a flare was detected, of a luminosity compatible with those from PMS stars, and which could be associated to its companion. Finally, the data used also led to the discovery of the second case of X-ray pulsations associated to beta Cephei activity. [less ▲]

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See detailHollow Nanoparticles for Low Cost, High Activity and Durability for the Oxygen Reduction Reaction for Fuel Cell Applications
Asset, Tristan ULiege

Doctoral thesis (2017)

This Ph.D. thesis investigates the mechanisms driving the formation, the enhanced activity for the oxygen reduction reaction (ORR) and the durability of porous hollow PtM/C nanoparticles (NPs) for proton ... [more ▼]

This Ph.D. thesis investigates the mechanisms driving the formation, the enhanced activity for the oxygen reduction reaction (ORR) and the durability of porous hollow PtM/C nanoparticles (NPs) for proton ex-change membrane fuel cell (PEMFC) applications. The formation and growth of the NPs, synthesized by a ‘one-pot’ process, were discussed in the light of microscopic, operando X-ray and electron-based tech-niques, unveiling the different intermediate steps of the synthesis. The synthe-sis process was extended to different non-noble metals (M = Ni, Co, Cu, Zn and Fe) and to different carbon supports. The enhanced activity for the ORR resulted from (i) the contraction of the lattice pa-rameter by the non-noble metal (the final NPs contains ca. 15 – 20 at. % of M), (ii) the open porosity and (iii) the density of structural defects at the surface of the NPs, which was semi-quantitativey estimated by COads stripping measurements and Rietveld analysis of wide-angle X-ray scattering patterns. The non-noble metal was found to be annealed (dissolved) faster than the structural defects during the accelerated stress tests. [less ▲]

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See detailDe la R&D à la mise sur le marché de produits industriels, évolutions de la recherche au service des entreprises
Blecker, Christophe ULiege

Conference (2017, September 26)

Ce séminaire retrace par des exemples concrets de développement de produits l'évolution des interactions entre le secteur alimentaire et la recherche fondamentale et appliquée. L'objectif est de mettre en ... [more ▼]

Ce séminaire retrace par des exemples concrets de développement de produits l'évolution des interactions entre le secteur alimentaire et la recherche fondamentale et appliquée. L'objectif est de mettre en avant l'apport de certaines méthodes de travail pour obtenir un partenariat entreprises-centres de recherche optimal. Pour conclure, il présente les principaux résultats de recherche dont son domaine dont les entreprises pourraient trouver un intérêt. [less ▲]

Detailed reference viewed: 34 (3 ULiège)