Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailDust formation by the colliding wind WC5+O9 binary WR19 at periastron passage
Williams, P. M.; Rauw, Grégor ULg; van der Hucht, K. A.

in Monthly Notices of the Royal Astronomical Society (2009), 395

We present infrared photometry of the episodic dust-making Wolf-Rayet system WR19 (LS3), tracking its fading from a third observed dust formation episode in 2007 and strengthening the view that these ... [more ▼]

We present infrared photometry of the episodic dust-making Wolf-Rayet system WR19 (LS3), tracking its fading from a third observed dust formation episode in 2007 and strengthening the view that these episodes are periodic (P = 10.1 +/- 0.1y). Radial velocities (RVs) of the O9 component observed between 2001 and 2008 show RV variations consistent with WR19 being a spectroscopic binary of high eccentricity (e = 0.8), having periastron passage in 2007.14, shortly before the phase of dust formation. In this respect, WR19 resembles the archetypical episodic dust-making colliding wind binary system WR140. Based on observations collected at the European Southern Observatory, La Silla, Chile, in allocations 67.D-0043, 70.D-0266, 72.D-0070, 73.D-0027, 74.D-0116, 76.D-0029, 78.D-0001, 79.D-0092 and 80.D-0198. E-mail: pmw@roe.ac.uk [less ▲]

Detailed reference viewed: 54 (0 ULg)
Full Text
See detailEco-efficiency methodology of Hybrid Electric Vehicle based on multidisciplinary multi-objective optimization
Nzisabira, Jonathan; Louvigny, Yannick ULg; Christiaens, Sébastien et al

in Proceeding of the 8th World Congress on Structural and Multidisciplinary Optimization (2009, June 01)

The eco-efficiency concept of clean propulsion vehicles aims at is simultaneously reducing the fuel consumption and environment pollutants impact (Eco-score) without decreasing the vehicle performances ... [more ▼]

The eco-efficiency concept of clean propulsion vehicles aims at is simultaneously reducing the fuel consumption and environment pollutants impact (Eco-score) without decreasing the vehicle performances and other user satisfaction criteria. Based on a simulation model in ADVISOR, one can evaluate the performances, the emissions and then the Ecoscore and the User Satisfaction for different driving scenarios. To establish a rationale methodology for conducting the eco-efficiency design of electric and hybrid vehicles, we adopt a multidisciplinary optimization approach while minimizing / maximizing both Ecoscore and User satisfaction objective functions. The proposed approach is then illustrated on the case study of the comparison of different mild parallel hybrid buses (hybrid electric vehicle (HEV) and hybrid hydraulic vehicle (HHV) by highlighting the effect of different energy storage systems (batteries, ultra capacitors, hydraulic system), mechanical and electric components sizes upon the optimized hybrid design. The optimization results show that the hybrid electric buses using ultra capacitors have almost the same performances as those using batteries, while the HHV technology can compete with HEV because of the hydraulic components low cost and recyclability if possibly using of water as motor/pump fluid. [less ▲]

Detailed reference viewed: 182 (19 ULg)
Full Text
Peer Reviewed
See detailThe Low Density Transiting Exoplanet WASP-15b
West, R. G.; Anderson, D. R.; Gillon, Michaël ULg et al

in Astronomical Journal (The) (2009), 137

We report the discovery of a low-density exoplanet transiting an 11th magnitude star in the Southern hemisphere. WASP-15b, which orbits its host star with a period P = 3.7520656 ± 0.0000028 d, has a mass ... [more ▼]

We report the discovery of a low-density exoplanet transiting an 11th magnitude star in the Southern hemisphere. WASP-15b, which orbits its host star with a period P = 3.7520656 ± 0.0000028 d, has a mass M [SUB]p[/SUB] = 0.542 ± 0.050 M [SUB]J[/SUB] and radius R [SUB]p[/SUB] = 1.428 ± 0.077 R [SUB]J[/SUB], and is therefore one of the least dense transiting exoplanets so far discovered (rho[SUB]p[/SUB] = 0.247 ± 0.035 g cm[SUP]--3[/SUP]). An analysis of the spectrum of the host star shows it to be of spectral type around F5, with an effective temperature T [SUB]eff[/SUB] = 6300 ± 100 K and [Fe/H] = --0.17 ± 0.11. [less ▲]

Detailed reference viewed: 22 (1 ULg)
Full Text
See detailSpin-orbit misalignement for the transiting planet HD 80606b
Gillon, Michaël ULg

Report (2009)

A global Markov Chain Monte Carlo analysis of published eclipse photometry and radial velocities is presented for the transiting planet HD 80606b. Despite the lack of a complete transit light curve, the ... [more ▼]

A global Markov Chain Monte Carlo analysis of published eclipse photometry and radial velocities is presented for the transiting planet HD 80606b. Despite the lack of a complete transit light curve, the size of the planet is measured with a good level of precision (R_p = 1.04 +0.05-0.09 R_Jup), while the orbital parameters are refined. This global analysis reveals that the orbital axis of the planet is significatively inclined relative to the spin axis of the host star (Beta = -59 +18-28 deg), providing a compelling evidence that HD 80606b owes its peculiar orbit to the Kozai migration mechanism. [less ▲]

Detailed reference viewed: 21 (1 ULg)
Full Text
Peer Reviewed
See detailEvidence for a role of sleep in forgetting of irrelevant information
Collette, Fabienne ULg; Rauchs, Géraldine; Landeau, Brigitte et al

in NeuroImage (2009, June), 47(Suppl 1), 328-

Detailed reference viewed: 22 (1 ULg)
Full Text
Peer Reviewed
See detailStroop-related cerebral activity is modulated by time of day and chronotype
Schmidt, Christina; Peigneux, Philippe ULg; Leclerq, Yves et al

in NeuroImage (2009, June), 47(Suppl 1), 12-

Detailed reference viewed: 29 (4 ULg)
Full Text
See detailMeasuring air-ice CO2 fluxes in the Arctic
Heinesch, Bernard ULg; Yernaux, Michel; Aubinet, Marc ULg et al

in FluxLetter: the Newsletter of FLUXNET (2009), 2(2), 9-10

Detailed reference viewed: 56 (17 ULg)
Full Text
See detailThermal Design of the OUFTI-1 nanosatellite
Jacques, Lionel ULg

Master's dissertation (2009)

OUFTI-1 is the first nanosatellite developed at the University of Liège and even the first one ever made in Belgium. This student project takes place within the framework of a long-term goal program ... [more ▼]

OUFTI-1 is the first nanosatellite developed at the University of Liège and even the first one ever made in Belgium. This student project takes place within the framework of a long-term goal program called LEODIUM (Liège in Latin). The goal of this program is to provide hands-on experience to engineering students through the development of a series of nanosatellite for scientific experiments in cooperation with space industries of the region of Liège. OUFTI-1 will be the first satellite ever equipped with one of the latest digital amateur radio communication protocol : the D-STAR protocol. This technology represents one of the three payload of OUFTI-1, since one target of the mission is to test this new protocol in space. The two other payloads are high efficiency solar cells provided by Azur Space and an innovative electrical power system developed with Thales Alenia Space ETCA. OUFTI-1 will hopefully be launched on the new European launcher Vega with eight other student nanosatellites. This present thesis focuses on the thermal design of OUFTI-1 whose goal is to guarantee all components are functioning within their allowable temperature range. With this in mind, different thermal model of increasing complexity are developed within both Matlab/Simulink and ESATAN/ESARAD environments. based on their results, proper measures will be taken to ensure all the components works indeed in their allowable range of temperatures. [less ▲]

Detailed reference viewed: 368 (24 ULg)
Full Text
Peer Reviewed
See detailEndocrine-disrupting chemicals : an Endocrine Society scientific statement
Diamanti-Kandarakis, Evanthia; Bourguignon, Jean-Pierre ULg; Giudice, Linda C. et al

in Endocrine Reviews (2009), 30(4), 293-342

There is growing interest in the possible health threat posed by endocrine-disrupting chemicals (EDCs), which are substances in our environment, food, and consumer products that interfere with hormone ... [more ▼]

There is growing interest in the possible health threat posed by endocrine-disrupting chemicals (EDCs), which are substances in our environment, food, and consumer products that interfere with hormone biosynthesis, metabolism, or action resulting in a deviation from normal homeostatic control or reproduction. In this first Scientific Statement of The Endocrine Society, we present the evidence that endocrine disruptors have effects on male and female reproduction, breast development and cancer, prostate cancer, neuroendocrinology, thyroid, metabolism and obesity, and cardiovascular endocrinology. Results from animal models, human clinical observations, and epidemiological studies converge to implicate EDCs as a significant concern to public health. The mechanisms of EDCs involve divergent pathways including (but not limited to) estrogenic, antiandrogenic, thyroid, peroxisome proliferator-activated receptor gamma, retinoid, and actions through other nuclear receptors; steroidogenic enzymes; neurotransmitter receptors and systems; and many other pathways that are highly conserved in wildlife and humans, and which can be modeled in laboratory in vitro and in vivo models. Furthermore, EDCs represent a broad class of molecules such as organochlorinated pesticides and industrial chemicals, plastics and plasticizers, fuels, and many other chemicals that are present in the environment or are in widespread use. We make a number of recommendations to increase understanding of effects of EDCs, including enhancing increased basic and clinical research, invoking the precautionary principle, and advocating involvement of individual and scientific society stakeholders in communicating and implementing changes in public policy and awareness. [less ▲]

Detailed reference viewed: 48 (4 ULg)
Full Text
See detailWeyrich, un QG en Ardenne
Habrand, Tanguy ULg

Article for general public (2009)

Detailed reference viewed: 31 (4 ULg)
Full Text
Peer Reviewed
See detailL'extension des droits politiques aux citoyens vivant à l'extérieur du territoire national à l'ère de la migration transnationale
Lafleur, Jean-Michel ULg

in EUI Working Papers (2009), (28), 1-21

Pourquoi un nombre croissant d'états décident-ils de permettre à leurs citoyens vivant à l'étranger de participer aux élections depuis l'extérieur du territoire national? Dans cet article, nous replaçons ... [more ▼]

Pourquoi un nombre croissant d'états décident-ils de permettre à leurs citoyens vivant à l'étranger de participer aux élections depuis l'extérieur du territoire national? Dans cet article, nous replaçons cette question dans le cadre de la modification des relations entre pays d'origine et émigré à l'heure de la migration transnationale. Toutefois, en questionnant le rôle des remises d'épargne et d'autres facteurs traditionnellement avancés pour expliquer l'évolution de ces relations, nous insistons également sur la dynamique politique interne des états d'origine pour comprendre le développement du droit de vote à l'extérieur. Ce papier, basé sur un travail de terrain au Mexique, en Italie et en Belgique, conclut en soulignant trois défis auxquels les états d'origine sont confrontés lors de l'extension des droits politiques à leurs citoyens émigrés. [less ▲]

Detailed reference viewed: 351 (43 ULg)
Full Text
See detailL’évaluation de la morphosyntaxe chez des enfants d’âge scolaire (7-12 ans) : les épreuves issues de la batterie L2MA-2
Chevrie-Muller, Claude; Maillart, Christelle ULg

in Rééducation Orthophonique (2009), 238

The L2MA2 Battery for the evaluation of “Oral language, Written language, Memory and Attentional skills” in French-speaking children between the ages of 8 1/2 and 10 1/2 was published in 1997. Over ten ... [more ▼]

The L2MA2 Battery for the evaluation of “Oral language, Written language, Memory and Attentional skills” in French-speaking children between the ages of 8 1/2 and 10 1/2 was published in 1997. Over ten years after its initial publication, the battery was revised and significantly modified. It was then standardized on a population of French-speaking children (French and Belgian) between the ages of 7 1/2 and 11 1/2. Among its new features, the evaluation is administered in two steps (first and second levels). The first level of the L2MA-2 battery comprises 11 fixed tests which give a preliminary representation of the patient’s resources and difficulties. Depending on obtained results, the clinician can chose, among 19 complementary tests that are available on an optional basis, tests that can yield a more specific diagnosis. This article deals more specifically with 9 tests which can provide a comprehensive evaluation of the child’s morphosyntactic skills, dealing with expressive or receptive skills, with oral or written skills, in a targeted or integrated manner. [less ▲]

Detailed reference viewed: 985 (35 ULg)
Full Text
See detailMicrobiological state of the art of walloon farm raw milk butter (2006 – 2009).
Godrie, Thérèse ULg; Di Tanna, Sybille ULg; Helleputte, Murielle ULg et al

in Fourteenth conference on food microbiology (2009, June)

For several years, Walloon Region has been supporting financially a project to help farmers: la Cellule Qualité Produits Fermiers (CQPF). This project aims to accompany farmers in their diversification ... [more ▼]

For several years, Walloon Region has been supporting financially a project to help farmers: la Cellule Qualité Produits Fermiers (CQPF). This project aims to accompany farmers in their diversification activities. In this context, Agricultural University of Gembloux, Department of Food Technology and “Centre d’Expertise pour la Qualité” have ensured and are ensuring autocontrol system implementation based on the HACCP principles, together with the application of good hygiene practice. In this context, microbiological analyses on farm raw milk butter have been performed. Results collected during the period from September 2006 to April 2009 are presented below. [less ▲]

Detailed reference viewed: 45 (13 ULg)
Full Text
Peer Reviewed
See detail“ARCHITECT FRIENDLY”: A COMPARISON OF TEN DIFFERENT BUILDING PERFORMANCE SIMULATION TOOLS
Attia, Shady ULg; Beltrán, Liliana; De Herde, André et al

in Proceedings of 11th International Building Performance Simulation Association Conference and Exhibition (2009, June)

A wide range of scientifically validated Building Performance Simulation tools BPS is available internationally. The users of those tools are mainly researchers, physicists and experts who value empirical ... [more ▼]

A wide range of scientifically validated Building Performance Simulation tools BPS is available internationally. The users of those tools are mainly researchers, physicists and experts who value empirical validation, analytical verification and calibration of uncertainty as defined by e.g. BESTEST. However, literature and comparative surveys indicate that most architects who use BPS tools in design practice are much more concerned with the (1) Usability and Information Management (UIM) of interface and (2) the Integration of Intelligent design Knowledge-Base (IIKB). Those two issues are the main factors for identifying a building simulation program as “Architect Friendly”. Now, with the advancement of BPS tools and the recent announcements of direct links between BIM or non-BIM modeling tools and BPS tools it is important to compare the existing programs. Based on an online survey, this paper presents the results of comparing ten major BPS tools. The following programs are compared: ECOTECT, HEED, Energy 10, Design Builder, eQUEST, DOE-2, Green Building Studio, IES VE, Energy Plus and Energy Plus-SketchUp Plugin (OpenStudio). With 249 valid responses, the survey ranked the tools in three classes and revealed that architects seek the IIKB above the UIM of the interface. Finally, the paper summarizes the key findings and underlines the major requirements for future improvement and development of BPS tools, mainly from an architectural perspective. [less ▲]

Detailed reference viewed: 300 (5 ULg)
Full Text
See detail'Wat er hollandsch is moet stil zijn, zoet en stil gelijk een muis': literatuuronderwijs in de Zuidelijke provincies onder koning Willem I (1814-1830)
Steyaert, Kris ULg

in e-meesterwerk (2009)

When King William I decreed that Dutch would be the only ‘national language’ of the United Kingdom of the Netherlands (1814-1830), he expected teachers in the Southern provinces of the realm to promote ... [more ▼]

When King William I decreed that Dutch would be the only ‘national language’ of the United Kingdom of the Netherlands (1814-1830), he expected teachers in the Southern provinces of the realm to promote Dutch among the French-speaking population. This led to the production of an enormous number of Dutch grammars, pronunciation guides, phrase books, and dictionaries. Since reading Dutch authors was part of the curriculum, this vast body of textbooks also included literary histories and (bilingual) anthologies. An analysis of the literary textbooks aimed at Francophone learners of Dutch and published from the first few years of William I’s reign up to Belgium’s independence in 1830 reveals that they served a dual purpose, functioning to demonstrate the existence of a well-established Dutch literary tradition rivalling that of the major European languages, while providing practical tools in the language acquisition process. The authors of these materials varied in their methodological approach and selection criteria, but they were all working towards a common goal: to transform the French-speaking inhabitants of the country into proper, patriotic Dutchmen, often in the face of local opposition and hostility. [less ▲]

Detailed reference viewed: 95 (14 ULg)
Full Text
Peer Reviewed
See detailPlanning flood risk reducing measures based on combined hydraulic and socio-economic impact modelling at a micro-scale
Ernst, Julien ULg; Coninx, Ingrid; Dewals, Benjamin ULg et al

in Christodoulou, S. E. (Ed.) Proc. 7th Int. Conf. on Water Resources Conservancy and Risk Reduction Under Climatic Uncertainty (2009, June)

Risk management is currently shifting from the full protection against flooding towards the management of the consequences of flooding. To reduce these consequences, micro-scale analysis is compelled. In ... [more ▼]

Risk management is currently shifting from the full protection against flooding towards the management of the consequences of flooding. To reduce these consequences, micro-scale analysis is compelled. In addition to the hydraulic modelling of the inundation flow, nearby land use and vulnerability of elements-at-risk are taken into consideration. This new approach requests an interdisciplinary collaboration of scientists from hydraulic and social science, as is the case for this paper. The research teams have developed a methodology to evaluate socio-economic consequences of flooding based on the analysis at the micro-scale of the flood characteristics, the exposure and the vulnerability of elements-at-risk and the adaptive capacity of society. The hydrodynamic simulations are conducted by means of 2D flow modelling run on a highly accurate Digital Surface Model - DSM with a resolution of 2 by 2 meters. The two-dimensional modelling provides high resolution flood maps detailing the distribution of water depth and flow velocity field in the floodplains, which constitute key inputs for the subsequent flood risk analysis. The methodology will be illustrated for a case study along River Ourthe, which is the main tributary of River Meuse in Belgium, for selecting and designing flood protection measure. The geographic data in this area are available at a resolution consistent with the conducted micro-scale risk analysis. They include data on social vulnerability coming from the most recent socio-economic national survey (NIS). [less ▲]

Detailed reference viewed: 45 (5 ULg)
Full Text
See detailLes difficultés morphosyntaxiques des enfants présentant des troubles spécifiques du langage oral: une approche constructiviste
Leroy, Sandrine ULg; Parisse, Christophe; Maillart, Christelle ULg

in Rééducation Orthophonique (2009), 238

The Construction and Usage-based Theory (CUT) combines two main approaches drawn from cognitive linguistics: construction grammar and usage-based theory. The CUT emphasizes the fact that language ... [more ▼]

The Construction and Usage-based Theory (CUT) combines two main approaches drawn from cognitive linguistics: construction grammar and usage-based theory. The CUT emphasizes the fact that language structures progressively emerge through the use of general cognitive processes. Most new forms produced by a child are built upon his/her own previous productions that he/she complexifies and generalizes to construct more abstract forms. These hypotheses have been tested with normally-developing children but have not yet been tested on children with specific language impairment (SLI). In this paper, we put forward several hypotheses drawn from constructivistic approaches to explain morphosyntactic difficulties displayed by children with SLI. Their goal is to create a theoretical framework for future behavioral studies. [less ▲]

Detailed reference viewed: 540 (73 ULg)
Full Text
Peer Reviewed
See detailPredictors and correlates of changes in residents' burnout level: Influence of person- and work-related variables
Bragard, Isabelle ULg; Etienne, Anne-Marie ULg; Libert, Yves et al

in Psycho-oncology (2009, June), 18 (Suppl. 2)

Detailed reference viewed: 31 (5 ULg)
Full Text
Peer Reviewed
See detailCommunication skills training: A study of residents' psychosocial and physiological variables which facilitate or inhibit the learning of assessment skills
Hasoppe, Jennifer; Merckaert, Isabelle; Libert, Yves et al

in Psycho-oncology (2009, June)

Detailed reference viewed: 29 (5 ULg)