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See detailDéserts, poussières et migrations
Ozer, Pierre ULiege

Article for general public (2006)

Chaque année, le Sahara injecte près d'un milliard de tonnes de poussières dans l'atmosphère. Plus de 100 millions de tonnes de ces poussières prennent la direction de l'Europe. Beaucoup d'entre elles se ... [more ▼]

Chaque année, le Sahara injecte près d'un milliard de tonnes de poussières dans l'atmosphère. Plus de 100 millions de tonnes de ces poussières prennent la direction de l'Europe. Beaucoup d'entre elles se perdent dans la Méditerranée avant d'atteindre le Vieux Continent. D'autres retombent au gré des pluies et recouvrent périodiquement nos véhicules. Elles constituent un véritable problème de santé publique dans le sud de l'Europe, comme en Espagne, car l'importante concentration de ces fines particules dégrade la qualité de l'air que nous respirons. Certes, ce phénomène a toujours existé. Mais il a très fortement augmenté depuis les années 1980, depuis que les zones péridésertiques sont sujettes aux processus de plus en plus pressants de désertification. La végétation ayant disparu sur des centaines de millions d'hectares, de nouveaux sols ont été emportés par le vent. [...] [less ▲]

Detailed reference viewed: 525 (54 ULiège)
Peer Reviewed
See detailDeserving EU citizenship: The case of undocumented Italian migrants in Belgium
Lafleur, Jean-Michel ULiege; Mescoli, Elsa ULiege

Conference (2017)

Stemmed from a research conducted in Belgium, this paper aims at exploring the notion of deservingness through the analysis of a specific case study. The increased removal of residence permits from ... [more ▼]

Stemmed from a research conducted in Belgium, this paper aims at exploring the notion of deservingness through the analysis of a specific case study. The increased removal of residence permits from European citizens claiming social security benefits shows that the right of freedom within EU is questioned. We consider in particular Italians migrants who moved to Belgium during the economic crisis that started in 2008. The study of this case lets us highlight that the restriction of the mobility of the poor in general shapes here in terms of “undeserving” the right to freedom of movement and determines further stratifications among migrants. Moreover, migrants finding themselves becoming illegal as result of contextual process, in spite of their non-deportability, need to provide “evidence of deservingness” to re-establish their residence rights. Strategies are developed to this aim within an emerging discourse of a “moral economy of deservingness” and they respond to the individuals’ precarious statuses. Through ethnographic examples, we will analyse these dynamics and propose a conceptualization of citizenship whose actualization is conditioned by further socio-economic issues. [less ▲]

Detailed reference viewed: 26 (1 ULiège)
See detailLe désherbage mécanique, une technique d'avenir
Dardenne, J.; Dewez, G.; Vandersmissen, P. et al

in Revue de l’Agriculture = Landbouwtijdschrift (1992), 45(6), 1193-1200

Detailed reference viewed: 29 (1 ULiège)
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See detailDesiccation cracks formation in clay-barrier for nuclear waste disposal
Hubert, Julien ULiege; Prime, Noémie; Plougonven, Erwan ULiege et al

Conference (2016, February 16)

In geotechnical engineering, the desiccation cracking of soil is commonly observed. This phenomenon is detrimental to the behavior of earth material and earth structure. Desiccation cracks can lead to the ... [more ▼]

In geotechnical engineering, the desiccation cracking of soil is commonly observed. This phenomenon is detrimental to the behavior of earth material and earth structure. Desiccation cracks can lead to the overall failure of many geotechnical structures: • They can affect the slope stability of earth dams or embankments; • They can initiate internal erosion of embankments due to water flow through the cracks; • They can compromise the efficiency of soil barriers such as landfill liners and top covers. Nowadays, the storage of nuclear waste in deep impermeable geological layers is considered. These storages are based on the multi-barrier principle, the last of which being the host rock, typically a clayey material. In this context, maintaining the very low hydraulic conductivity of the host rock is crucial. Unfortunately, the ventilation of excavated galleries causes convective drying of the host material and can lead to crack formation. This work aims to understand in which conditions exactly, during convective drying, does cracking occur in clayey materials. An experimental campaign has been carried out to characterize the drying behavior of Boom clay which is the host rock at the underground research facility in Mol (Belgium). X-Ray micro-tomography has been used to analyze crack development as well as shrinkage. The experiments are used to calibrate the transfer parameters of a convective drying law based on the limit layer model. This calibration is based on agreement of the drying kinetics. A numerical study is then performed and aims at reproducing the behavior observed during the experiments. A thermo-hydro-mechanical coupled model is used to determine the stress distribution during the drying and a tensile failure criterion is suggested to predict crack genesis. Simulations are performed using the in-house built FEM code LAGAMINE. [less ▲]

Detailed reference viewed: 139 (13 ULiège)
See detailDesiccation-tolerance : an advantage for the biotechnological applications of bacteria
Weekers, F.; Jacques, Philippe ULiege; Springael, D. et al

Poster (1999, July)

Detailed reference viewed: 29 (1 ULiège)
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Peer Reviewed
See detailDesign aids for the design of steel moment connections
Jaspart, Jean-Pierre ULiege

in Proceedings of the 5th International Colloquium on Stability of Metal Structures (1996)

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See detailDesign and analysis of an SOI MEMS voltage step-up converter
Gleeson, R.; Kraft, Michaël ULiege; White, N. M.

in Journal of Micromechanics and Microengineering (2013), 23(11), 114017

Detailed reference viewed: 21 (1 ULiège)
Peer Reviewed
See detailDesign and analysis of MEMS step up voltage converters
Gleeson, R.; Kraft, Michaël ULiege; White, Neil

in IEEE Sensors 2012 (2012, November)

This paper presents a comprehensive analysis of voltage step-up converters for energy harvesting and other low-power applications. The step-up operation is based on isolating the charge of a mechanically ... [more ▼]

This paper presents a comprehensive analysis of voltage step-up converters for energy harvesting and other low-power applications. The step-up operation is based on isolating the charge of a mechanically variable capacitor and varying the gap between the electrodes by an appropriate method of providing an actuation force i.e. electrostatic or physical. Two devices are presented; a bi-stable device and a resonant device, specifically designed for solar and vibration energy harvesting respectively. The bi-stable device introduces a separate electrostatic actuator element to manipulate the variable capacitor electrodes, whereas, in the case of the resonant device, ambient vibrations provide the necessary actuation force. System-level Multisim models have been developed and verified using 3D FEM Coventorware and MEMS+ simulations. The devices were then fabricated using a dicing-free Silicon-on-Insulator (SOI) process developed at the Southampton Nanofabrication Centre. [less ▲]

Detailed reference viewed: 46 (1 ULiège)
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See detailDesign and analysis of SOI MEMS voltage step up converters
Gleeson, R.; Kraft, Michaël ULiege; White, N. M.

in Proceedings PowerMEMS 2012 (2012, December)

Detailed reference viewed: 16 (2 ULiège)
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See detailDesign and analysis of two types of MEMS DC-DC step up voltage converters
Gleeson, R.; White, N. M.; Kraft, Michaël ULiege

in MME 2011: Proceedings (2011)

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See detailDesign and calibration of a two-camera (VNIR and SWIR) hyperspectral acquisition system for the characterization of metallic alloys from the recycling industry
Barnabé, Pierre ULiege; Dislaire, Godefroid ULiege; Leroy, Sophie ULiege et al

in Journal of Electronic Imaging (2015), 24(6),

The conception of a prototype combining two hyperspectral cameras, one ranging from visible to near-infrared and the other covering short-wave infrared, is presented. The prototype aims at the ... [more ▼]

The conception of a prototype combining two hyperspectral cameras, one ranging from visible to near-infrared and the other covering short-wave infrared, is presented. The prototype aims at the characterization of millimeter-sized metallic alloys particles, originating from end-of-life vehicles and waste electrical and electronic equipment recycling. This paper is meant to serve as a support for a similar project by presenting difficulties encountered and available solutions. The calibration steps necessary to obtain quality reflectance data are also described. Classification results obtained on 100 metallic fragments dataset are finally presented. [less ▲]

Detailed reference viewed: 23 (4 ULiège)
Peer Reviewed
See detailDesign and characterization of novel forms of human 16K prolactin, an antiangiogenic factor
Mainfroid, Véronique; Struman, Ingrid ULiege; Weiner, Richard I. et al

Poster (1998, January)

Detailed reference viewed: 13 (1 ULiège)
Peer Reviewed
See detailDesign and develoment of a digital transducer
Lewis, CP; Kraft, Michael ULiege; Hesketh, TG

in Proc. AEROTECH 95 (1995)

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See detailDesign and development of new polyamides by ring-opening polymerization for high performance composite materials
Tunc, Deniz; Carlotti, Stéphane; Lecomte, Philippe ULiege et al

Poster (2013, May 16)

Detailed reference viewed: 80 (11 ULiège)
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See detailDesign and dimensioning of hydrogen transmission pipeline networks
de Wolf, Daniel ULiege

in European Journal of Operational Research (2013), 229(1), 239-251

Detailed reference viewed: 15 (1 ULiège)
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See detailDesign and Evaluation of a High-Density Energy Storage Route with CO2 Re-Use, Water Electrolysis and Methanol Synthesis
Léonard, Grégoire ULiege; Giulini, Davide; Villarreal-Singer, Diego

in Computer Aided Chemical Engineering (2016), 38

The energy transition corresponding to more electricity generation from variable and decentralized renewable energy sources requires the development of electricity storage technologies ranging from ... [more ▼]

The energy transition corresponding to more electricity generation from variable and decentralized renewable energy sources requires the development of electricity storage technologies ranging from seconds to seasons. The power-to-fuel process provides a way to store electricity as a liquid energy vector, leading to high energy density and cheap long-term storage at ambient conditions. In the present work, we study the powerto- methanol process combining CO2 capture, water/CO2 co-electrolysis and methanol synthesis. An Aspen Plus model focussing on the electrolysis and methanol synthesis sub-processes is presented. The energy conversion efficiency is improved from 40.1 to 53.0 % thanks to heat integration using the pinch method. Further works include the experimental demonstration of this technology as well as the development of control strategies for its regulation. [less ▲]

Detailed reference viewed: 89 (4 ULiège)