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See detailOscar Orban est-il l'Albert Dicey du plat pays?
Bouhon, Frédéric ULiege

Conference (2017, September 20)

L'exposé porte sur la personnalité d'Oscar Orban, professeur de droit public à l'Université de Liège au début du 20e siècle. Elle se focalise sur son oeuvre majeure, "Le droit constitutionnel de la ... [more ▼]

L'exposé porte sur la personnalité d'Oscar Orban, professeur de droit public à l'Université de Liège au début du 20e siècle. Elle se focalise sur son oeuvre majeure, "Le droit constitutionnel de la Belgique", publiée en trois volumes entre 1906 et 1911. [less ▲]

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See detailLegitimating innovation by foreign traditions: the case of the Roman Republican divination
Berthelet, Yann ULiege

Conference (2017, September 20)

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See detailWP1 - A summary
Sanchez, Christelle ULiege

Conference (2017, September 20)

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See detailLéon Graulich (1887-1966)
Desseilles, François ULiege

Scientific conference (2017, September 20)

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See detailIntégration système et simulation
Hennaut, Samuel ULiege; Davin, Elisabeth ULiege; Baiwir, Romain ULiege et al

Scientific conference (2017, September 20)

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Peer Reviewed
See detailÉmile de LAVELEYE (1822-1892) et le « bon » gouvernement
Grandjean, Geoffrey ULiege

Conference (2017, September 20)

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See detailStochastic multiscale modeling of MEMS stiction failure
Hoang Truong, Vinh ULiege

Doctoral thesis (2017)

In the context of microelectromechanical systems, due to their reduced size, the surface phenomena, e.g. adhesion contact, play an important role in the reliability of the devices. Indeed, the adhesive ... [more ▼]

In the context of microelectromechanical systems, due to their reduced size, the surface phenomena, e.g. adhesion contact, play an important role in the reliability of the devices. Indeed, the adhesive forces, e.g. capillary and van der Waal forces, can lead to the stiction failure for which the two contacting surfaces can accidentally be stuck together permanently. This is a common failure of MEMS. Because of the comparability between the roughness of the contacting surfaces and the ranges of adhesive stress, the interaction area can be much smaller than the apparent one. Since the contact zone is reduced and becomes comparable with the characteristic length scale of the surface roughness, the behaviors of micro structures subjected to adhesion suffer from a scatter, i.e. while some devices are unstuck, the others with an identical design are stuck. The objective of this work is to predict in a probabilistic way the adhesion behaviors of MEMS by accounting for the randomness of the contacting surfaces. The straightforward solution toward this end consists in constructing a numerical model, e.g. using finite element method, and in performing a Monte-Carlo simulation (MCS) directly on that model. Because the problem spans multiple scales, including the nanometers range of adhesive stress and the micrometers length scale of MEMS, that method demands a huge computational cost and becomes unpractical. In this work, a stochastic model-based multiscale method is developed to fulfill the predefined objective while remaining efficient in terms of computational cost. In this model, MCS is also per- formed, however, in a scale-by-scale way. With this method, the model is executed with acceptable computational cost. To verify the proposed model, a comparison in terms of the numerical predictions obtained from two approaches, direct MCS and stochastic model-based method, is performed. Furthermore, the model is applied to simulate the stiction tests reported in the literature, and also on the experimental surfaces fabri- cated by our partner at IMT-Bucharest lab 1 (without stiction test). By comparing the numerical predictions with the experimental results, the model is then validated. The model is used to broaden our knowledge in stiction phenomenon by considering the effects of the following aspects on the adhesion energies: the roughness of surfaces, the non-Gaussianity in the probability distribution of surface heights, and the humidity of the environment conditions. Furthermore, the comparison between different sources of uncertainty, e.g. due to the surfaces roughness and in the geometry dimensions of the devices, is performed. [less ▲]

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See detailDenitrification, anaerobic ammonium oxidation, and dissimilatory nitrate reduction to ammonium in an East African Great Lake (Lake Kivu)
Roland, Fleur ULiege; Darchambeau, François; Borges, Alberto ULiege et al

in Limnology and Oceanography (2017)

We investigated anaerobic nitrogen (N) cycling in the water column of Lake Kivu, a deep meromictic tropical lake in East Africa. Data were collected at one station in the Northern Basin and one in the ... [more ▼]

We investigated anaerobic nitrogen (N) cycling in the water column of Lake Kivu, a deep meromictic tropical lake in East Africa. Data were collected at one station in the Northern Basin and one in the Southern Basin, during two sampling campaigns (June 2011—dry season, and February 2012—rainy season). Short-term incubations of sulfide-free water with 15N-labeled substrates revealed high potential denitrification and dissimilatory nitrate reduction to ammonium (DNRA) rates (up to 350 and 36 nmol N produced L−1 h−1, respectively), while anaerobic ammonium oxidation (anammox) was lower (up to 3.3 nmol N produced L−1 h−1). However, anammox rates were 15 nmol N produced L−1 h−1 when 15 NH4+ was added at depths where NH4+ concentrations were very low (< 1 μmol L−1). With the addition of 5 μmol L−1 of 15 NO3− and 10 μmol L−1 of H2S, denitrification and anammox were stimulated in the Northern Basin, while the increase of DNRA rates was less notable. In the Southern Basin, the addition of H2S decreased denitrification rates, probably because of competition with DNRA, which increased, while no effect was observed on anammox. This study puts into evidence the co-occurrence of denitrification, anammox and DNRA, for the first time in a great tropical lake, and underlines the spatial heterogeneity of these processes. Contrary to numerous reports in literature, we show that anammox can significantly occur in presence of H2S, suggesting that the contribution of anammox in the N cycle may be underestimated. [less ▲]

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See detailPlanetary missions in the STAR institute
Palmaerts, Benjamin ULiege

Scientific conference (2017, September 15)

Quick overview of all the current and future planetary missions in which the STAR institute is involved.

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See detailOf trees and men: new insights into man-environment relationships in the moist forests of central Africa during the late Holocene
Morin, Julie ULiege

Doctoral thesis (2017)

In central Africa, vegetation history has been documented by paleoenvironmental studies (especially palynology), which mainly concerned the way climate has shaped the forest landscapes. Human impacts in ... [more ▼]

In central Africa, vegetation history has been documented by paleoenvironmental studies (especially palynology), which mainly concerned the way climate has shaped the forest landscapes. Human impacts in this region have hardly been studied so far, especially at local scale. The main objective of this PhD is to propose an approach based on archaeology and the use of charred botanical remains found in soils, either wood charcoal or seeds, in order to document the Holocene anthropogenic impacts on the forest structure and composition. When coupled with the diachronic analysis of human activities, these land-use biomarkers can allow a better understanding of the relationship between man and his environment in central Africa during this period. Thereby, the first part of this PhD introduces the conceptual framework and the materials and methods used during the research. Then, the second part constitutes the core of the work, and presents the chronology of human activities in the northern Congo Basin, the use of biomarkers to discrimate between these activities, either domestic or agricultural, and the effect of the recent anthropogenic activities in the dynamic of several light-demanding tree populations. Finally, the third part draws the main recommendations of the work, and formulates potential for additional research. [less ▲]

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See detailDroit constitutionnel belge - Plan général du cours (année 2017-2018)
Behrendt, Christian ULiege

Learning material (2017)

Le document constitue le Plan général de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en 2e année de bachelier en droit.

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See detailIntroduction au droit public - Plan général du cours (année 2017-2018)
Behrendt, Christian ULiege

Learning material (2017)

Le document constitue le Plan général de l'enseignement d'Introduction au Droit public dispensé à l'Université de Liège en 1ère année de bachelier en droit.

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See detailPhysics at the Ultra-high Energies
Bhattacharya, Atri ULiege

Scientific conference (2017, September 15)

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See detailThe Einstein Telescope
Cudell, Jean-René ULiege

Speech/Talk (2017)

Brief description of the Einstein Telescope project.

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See detailDark matter
Laletin, Maxim ULiege

Scientific conference (2017, September 15)

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Peer Reviewed
See detailSharing good practices in physical education to promote physical activity, wellness and health
Bonni, Jérémy ULiege; Cloes, Marc ULiege

Poster (2017, September 15)

The Wallonia-Brussels Federation is about to overhaul its education system, which will directly affect teacher training. Under the “Pact for Excellence in Education”, a group of experts – the Consortium ... [more ▼]

The Wallonia-Brussels Federation is about to overhaul its education system, which will directly affect teacher training. Under the “Pact for Excellence in Education”, a group of experts – the Consortium “Physical Activities, Well-Being and Health” – drawn from the 12 French-speaking institutions training PE teachers (universities and colleges) has been mandated by the Ministry of Education to design devices and tools aiming at implementing the new common core curriculum that is under construction. Good practices have been identified then described in information sheets common to the different consortiums of the PEE and listed in a table that cross-references the 6 dimensions of physical activity at school (Snyers et al., 2014) and the 20 objects of teaching-learning in health education (Turcotte et al., 2011). These good practices are meant to be shared later within a community of practice. This paper provides a description of one of these information sheets in order to illustrate the methodology applied in this project. [less ▲]

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See detailCoronagraphy and Interferometry: Imaging the sky at high contrast and high-angular resolution
Defrere, Denis ULiege; Absil, Olivier ULiege

Scientific conference (2017, September 15)

Short overview of the main activities related to exoplanet imaging at the STAR Institute

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See detailPresentation of thermo-mechanical laboratory of CSL
Plesseria, Jean-Yves ULiege

Scientific conference (2017, September 15)

Presentation of the Thermo-machanical group of CSL

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See detailExoplanetary Transits
Gillon, Michaël ULiege

Scientific conference (2017, September 15)

Exoplanetary Transits

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See detailPresentation of CSL's Laboratory of Electronics at the First STAR Workshop on 15/09/2017
Graas, Estelle ULiege

Scientific conference (2017, September 15)

Presentation of CSL's Laboratory of Electronics at the First STAR Workshop on 15/09/2017

Detailed reference viewed: 23 (10 ULiège)