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See detailService operations report SENEGAL 2007
Delrue, Josefien; Barbieri, Massimo; Tychon, Bernard ULg et al

Report (2008)

GMFS (Global Monitoring for Food Security) is a GMES Service Element (GSE) project, part of the ESA contribution to the EU / ESA GMES (Global Monitoring for Environment and Security) Programme. GMFS aims ... [more ▼]

GMFS (Global Monitoring for Food Security) is a GMES Service Element (GSE) project, part of the ESA contribution to the EU / ESA GMES (Global Monitoring for Environment and Security) Programme. GMFS aims to establish an earth observation based operational service for crop monitoring to support food security decision makers and EU policy objectives. The aim of this document, as expressed in the statement of work is to: - Evaluate the operations planned versus the services agreed - Review the external infrastructure - Review issues and experiences with relation to adopted standards The aim of the document is to give a complete report of all activities executed by the service partners to deliver agricultural monitoring services to the Centre de Suivi Ecologique (CSE) in Senegal for the 2007 growing season. [less ▲]

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See detailGRB 080315: optical observations.
de Ugarte Postigo, A.; Chantry, Virginie ULg; Castro-Tirado, A. J. et al

E-print/Working paper (2008)

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See detailLes origines du métier de pharmacien
Angenot, Luc ULg

Article for general public (2008)

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See detailLe parcours linguistique antérieur des étudiants de premier BAC. Hypothèses sur les causes du malaise et présentation de quelques pistes de solution
Simons, Germain ULg

Conference (2008, March 13)

Dans cette communication, G. Simons émet différentes hypothèses susceptibles d'expliquer l'hétérogénéité croissante des niveaux de maîtrise en langue dans le secondaire et en Bac 1 à l'Université et ... [more ▼]

Dans cette communication, G. Simons émet différentes hypothèses susceptibles d'expliquer l'hétérogénéité croissante des niveaux de maîtrise en langue dans le secondaire et en Bac 1 à l'Université et propose quelques pistes de solution pour tenter de gérer celle-ci. Il se penche ensuite sur le niveau de maîtrise des élèves en langues étrangères dans le secondaire, fournit quelques éléments pouvant expliquer une "baisse de niveau", et esquisse quelques solutions pour améliorer ce niveau. La conclusion de cette communication présente une liste de mesures qui pourraient être prises pour optimiser l'enseignement des langues dans le secondaire et donc faciliter la transition des étudiants dans l'enseignement supérieur/universitaire. [less ▲]

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See detailL'insuffisance rénale et sa prise en charge
Krzesinski, Jean-Marie ULg; DELANAYE, Pierre ULg; Smelten, Nicole ULg et al

in Revue Médicale de Liège (2008, March 13)

Chronic kidney disease is a worldwide growing problem, especially nowadays due to 3 factors very often encountered together (old age, diabetes mellitus and arterial hypertension) A multidisciplinary ... [more ▼]

Chronic kidney disease is a worldwide growing problem, especially nowadays due to 3 factors very often encountered together (old age, diabetes mellitus and arterial hypertension) A multidisciplinary approach is needed to reduce this epidemic with important health implication. This needs of course well trained health partners. On the occasion of the world kidney day on March 2008, five lectures were given on the topic. The lecturers have insisted on the up to date management of chronic kidney insufficiency, a serious problem of public health. [less ▲]

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See detailC'est toujours la faute de l'autre en Belgique
Grandjean, Geoffrey ULg

Article for general public (2008)

This article aims to analyse quickly the conflict between the two big communities in Belgium. This State has been confronted to several crises. Each community considers that this is the responsability of ... [more ▼]

This article aims to analyse quickly the conflict between the two big communities in Belgium. This State has been confronted to several crises. Each community considers that this is the responsability of the other. The language has an important role to play in this situation. [less ▲]

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See detailAnalysis of hybrid hydraulic vehicles and comparison with hybrid electric vehicles using batteries or super capacitors
Louvigny, Yannick ULg; Nzisabira, Jonathan; Duysinx, Pierre ULg

Conference (2008, March 12)

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV ... [more ▼]

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV can lead to fuel savings even though smaller than HEV. Hydraulic energy recovery systems are well adapted for heavy urban vehicles with frequent starts and stops because the weight penalty of the hydraulic system can be mitigated while taking benefit of their high specific power property for power assist. This recent work investigates and compares, from an economical and technical point of view, both HHV and HEV buses using batteries or super capacitors as energy storage systems. The fuel consumption of different hybrid busses is simulated using ADVISOR on the basis of three European SORT driving cycles. The results show that HHV and HEV with super capacitors can not rival from the consumption point of view with the HEV using batteries as energy storage system. But they can be economically interesting because of their lower cost and the longer service life of their energy storage system. [less ▲]

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See detailSIGHTING FREQUENCY AND PHOTO-IDENTIFICATION OF BOTTLENOSE DOLPHINS (TURSIOPS TRUNCATUS) ALONG THE COAST OF BAHÍA SAN ANTONIO, PATAGONIA, ARGENTINA
Holsbeek, Ludo; Cammareri, Alejandro; Failla, Mauricio et al

Poster (2008, March 10)

The sighting frequency (SF), site fidelity, home-range and group composition of bottlenose dolphins (Tursiops truncatus) were assessed during a photo-identification study in 2006-2007. This study aims to ... [more ▼]

The sighting frequency (SF), site fidelity, home-range and group composition of bottlenose dolphins (Tursiops truncatus) were assessed during a photo-identification study in 2006-2007. This study aims to provide first data on this unknown austral bottlenose dolphin population to answer to their increasing conservation needs. Data and pictures were collected during 132 surveys with an average observation effort of 2.8h (SD=1.6) per survey. All clear pictures were analysed using the automatic identification systems FinEx and FinMatch (EuroPhlukes Initiative). The SF was obtained dividing the number of sightings by the amount of effort. Site-fidelity was estimated using the Capture Mark Recapture method and the degree of residency by the re-identification frequency following Culloch (2004). In total, 377.4h were spent searching for bottlenose dolphins of which 57.3h were spent in the presence of 126 dolphin groups divided in 105 sightings. The SF was 0.28/h with and average duration of 43.2min/sighting (SD=0.76). A total of 43 dolphins were classified into an identification catalogue. These recognizable dolphins were re-identified up to 10 days with 44% (n=43) showing a degree of residency (resighting frequency (RF)¿4). The average group size was 6.1 (SD=7.9) ranging from one to fifty animals. Group size increased significantly with the presence of calves and with the distance from the coast. Nevertheless, all dolphins were seen in inshore waters ¿20m deep. The most frequent group formation was loose (34.5%), variable (29.8%), disperse (20.2%) and tight (15.5%). At least 6 identified dolphins, including one mother with her calf, were photographed in the mouth of the Rio Negro 250km from the study area indicating that their home-range is far from limited to Bahia de San Antonio. Data indicate that it concerns a resident but yet unknown population of bottlenose dolphins with a high commercial potential and an urgent need of conservation measurements. [less ▲]

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See detailUtilisation des scories de la sidérurgie ancienne pour l'étude de la dynamique des rivières du massif ardennais
Houbrechts, Geoffrey ULg

Conference given outside the academic context (2008)

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See detailExtraction of ferulic acid, a natural antioxidant, for potential agro-industrial applications.
Barberousse, Hélène; Roiseux, Olivier; Deroanne, Claude et al

Poster (2008, March 05)

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See detailCoating of gold nanoparticles by thermosensitive poly(N-isopropylacrylamide) end-capped by biotin
Aqil, Abdelhafid ULg; Qiu, Hongjin; Greisch, Jean-François ULg et al

in Polymer (2008), 49(5), 1145-1153

Gold nanoparticles (NPs) were prepared by reduction of HAuCl4 in aqueous solution and stabilized by poly(N-isopropylacrylamide) (PNIPAM). PNIPAM was prepared by two distinct routes: (i) conventional free ... [more ▼]

Gold nanoparticles (NPs) were prepared by reduction of HAuCl4 in aqueous solution and stabilized by poly(N-isopropylacrylamide) (PNIPAM). PNIPAM was prepared by two distinct routes: (i) conventional free-radical polymerization leading to polymer without any reactive end-group, and (ii) Reversible Addition–Fragmentation chain Transfer (RAFT) polymerization with 2-dodecylsulfanylthiocarbonylsulfanyl-2-methyl propionic acid (DMP) as a RAFT agent. PNIPAM with low polydispersity was then end-capped by an α-carboxylic acid and an ω-trithiocarbonate that was converted into an ω-thiol upon hydrolysis. This hetero-telechelic polymer was analyzed by mass spectroscopy, size exclusion chromatography (SEC) and 1H NMR. Even without thiol end-group, known for chemisorption onto gold, PNIPAM was effective in stabilizing gold NPs (1–5 nm). The thermosensitivity of PNIPAM at the surface of gold NPs was, however, dependent on the molecular weight of the chains. Finally, the α-carboxyl end-group of PNIPAM was used to anchor biotin, which is indeed known for complexation with avidin, which is a possible strategy for the coated gold NPs to be involved as building blocks in supramolecular assemblies. TEM and UV–vis spectroscopy were used to characterize the gold nanoparticles. [less ▲]

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See detailPatrocles: a database of polymorphic miRNA-mediated gene regulation
Hiard, Samuel ULg; Baurain, Denis ULg; Coppieters, Wouter ULg et al

Conference (2008, March 03)

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See detailGenetic variability of fatty acids in bovine milk
Soyeurt, Hélène ULg; Gengler, Nicolas ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2008), 12(2), 203-210

Fatty acids composition of bovine milk influences the technological properties of butterfat and also presents some potential benefits for human health. Impact of feeding on fat composition is well ... [more ▼]

Fatty acids composition of bovine milk influences the technological properties of butterfat and also presents some potential benefits for human health. Impact of feeding on fat composition is well described in the literature; less information is available about the impact of genetics. Based on few studies, essentially conducted to isolate some feeding effect, the breed seemed to influence the fatty acids composition. The variation in the activity of δ-9 desaturase, key enzyme in the production of monounsaturated fatty acids and conjugated linoleic acids in milk, could explain these differences. Very few studies have been focussing on the estimation of genetic parameters of fatty acids composition. However, the moderate heritability estimates observed by these studies for the major fatty acids could suggest a potential genetic effect. [less ▲]

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See detailOn the observability of resonant structures in planetesimal disks due to planetary migration
Reche, R.; Beust, H.; Augereau, J.-C. et al

in Astronomy and Astrophysics (2008), 480

Context: The observed clumpy structures in debris disks are commonly interpreted as particles trapped in mean-motion resonances with an unseen exo-planet. Populating the resonances requires a migrating ... [more ▼]

Context: The observed clumpy structures in debris disks are commonly interpreted as particles trapped in mean-motion resonances with an unseen exo-planet. Populating the resonances requires a migrating process of either the particles (spiraling inward due to drag forces) or the planet (moving outward). Because the drag time-scale in resolved debris disks is generally long compared to the collisional time-scale, the planet migration scenario might be more likely, but this model has so far only been investigated for planets on circular orbits. Aims: We present a thorough study of the impact of a migrating planet on a planetesimal disk, by exploring a broad range of masses and eccentricities for the planet. We discuss the sensitivity of the structures generated in debris disks to the basic planet parameters. Methods: We perform many N-body numerical simulations, using the symplectic integrator SWIFT, taking into account the gravitational influence of the star and the planet on massless test particles. A constant migration rate is assumed for the planet. Results: The effect of planetary migration on the trapping of particles in mean motion resonances is found to be very sensitive to the initial eccentricity of the planet and of the planetesimals. A planetary eccentricity as low as 0.05 is enough to smear out all the resonant structures, except for the most massive planets. The planetesimals also initially have to be on orbits with a mean eccentricity of less than than 0.1 in order to keep the resonant clumps visible. Conclusions: This numerical work extends previous analytical studies and provides a collection of disk images that may help in interpreting the observations of structures in debris disks. Overall, it shows that stringent conditions must be fulfilled to obtain observable resonant structures in debris disks. Theoretical models of the origin of planetary migration will therefore have to explain how planetary systems remain in a suitable configuration to reproduce the observed structures. [less ▲]

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See detailNeural Correlates of Envisioning Emotional Events in the near and Far Future
D'Argembeau, Arnaud ULg; Xue, Gui; Lu, Zhong-Lin et al

in NeuroImage (2008), 40(1), 398-407

Being able to envision emotional events that might happen in the future has a clear adaptive value. This study addressed the functional neuroanatomy of this process and investigated whether it is ... [more ▼]

Being able to envision emotional events that might happen in the future has a clear adaptive value. This study addressed the functional neuroanatomy of this process and investigated whether it is modulated by temporal distance. Participants imagined positive and negative events pertaining to the near future or far future while their brain activity was measured with fMRI. The results demonstrate that the anterior part of the ventromedial prefrontal cortex (vmPFC) was more active in envisioning emotional events in the far future than in the near future, whereas the caudate nucleus was engaged in envisioning emotional (especially positive) situations in the near future. We argue that the anterior part of the vmPFC might assign emotional values to mental representations of future events that pertain to long-term goals. On the other hand, the caudate might support more concrete simulations of action plans to achieve rewarding situations in the near future. [less ▲]

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See detailWASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere
Wilson, D. M.; Gillon, Michaël ULg; Hellier, C. et al

in Astrophysical Journal (2008), 675

We report the discovery of WASP-4b, a large transiting gas-giant planet with an orbital period of 1.34 days. This is the first planet to be discovered by the SuperWASP-South observatory and CORALIE ... [more ▼]

We report the discovery of WASP-4b, a large transiting gas-giant planet with an orbital period of 1.34 days. This is the first planet to be discovered by the SuperWASP-South observatory and CORALIE collaboration and the first planet orbiting a star brighter than 16th magnitude to be discovered in the southern hemisphere. A simultaneous fit to high-quality light curves and precision radial velocity measurements leads to a planetary mass of 1.22[SUP]+0.09[/SUP][SUB]-0.08[/SUB] M[SUB]Jup[/SUB] and a planetary radius of 1.42[SUP]+0.07[/SUP][SUB]-0.04[/SUB] R[SUB]Jup[/SUB]. The host star is USNO-B1.0 0479-0948995, a G7 V star of visual magnitude 12.5. As a result of the short orbital period, the predicted surface temperature of the planet is 1761 K, making it an ideal candidate for detections of the secondary eclipse at infrared wavelengths. [less ▲]

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See detailLupus-TR-3b: A Low-Mass Transiting Hot Jupiter in the Galactic Plane?
Weldrake, David T F; Bayliss, Daniel D R; Sackett, Penny D et al

in Astrophysical Journal (2008), 675

We present a strong case for a transiting hot Jupiter planet identified during a single-field transit survey toward the Lupus Galactic plane. The object, Lupus-TR-3b, transits a V=17.4 K1 V host star ... [more ▼]

We present a strong case for a transiting hot Jupiter planet identified during a single-field transit survey toward the Lupus Galactic plane. The object, Lupus-TR-3b, transits a V=17.4 K1 V host star every 3.91405 days. Spectroscopy and stellar colors indicate a host star with effective temperature 5000 +/- 150 K, with a stellar mass and radius of 0.87 +/- 0.04 M[SUB]solar[/SUB] and 0.82 +/- 0.05 R[SUB]solar[/SUB], respectively. Limb-darkened transit fitting yields a companion radius of 0.89+/-0.07 R[SUB]J[/SUB] and an orbital inclination of 88.3[SUP]+1.3[/SUP][SUB]-0.8[/SUB] deg. Magellan 6.5 m MIKE radial velocity measurements reveal a 2.4 sigma K = 114 +/- 25 m s[SUP]-1[/SUP] sinusoidal variation in phase with the transit ephemeris. The resulting mass is 0.81 +/- 0.18 M[SUB]J[/SUB] and density 1.4 +/- 0.4 g cm[SUP]-3[/SUP]. Y-band PANIC image deconvolution reveals a V>=21 red neighbor 0.4[SUP]''[/SUP] away which, although highly unlikely, we cannot conclusively rule out as a blended binary with current data. However, blend simulations show that only the most unusual binary system can reproduce our observations. This object is very likely a planet, detected from a highly efficient observational strategy. Lupus-TR-3b constitutes the faintest ground-based detection to date, and one of the lowest mass hot Jupiters known. [less ▲]

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