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See detailLe chewing-gum et la nutrition : clichés et nouveaux mots du pouvoir
Durand, Pascal ULg

Conference (2007, March 17)

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See detailLe conflit dans l'état civil : l'envers du droit chez Thomas Hobbes
Herla, Anne ULg

Conference (2007, March 15)

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See detailImpacts of vegetation changes on LGM climate
Henrot, Alexandra ULg; François, Louis ULg; Munhoven, Guy ULg

Conference (2007, March 12)

The impacts of vegetation change on the climate at the Last Glacial Maximum are investigated with the Earth System Model of Intermediate Complexity Planet Simulator and the dynamic vegetation model Caraib ... [more ▼]

The impacts of vegetation change on the climate at the Last Glacial Maximum are investigated with the Earth System Model of Intermediate Complexity Planet Simulator and the dynamic vegetation model Caraib (CARbon Assimilation in the Biosphere). [less ▲]

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See detailThe fringes of psychosis proneness: unfolding the domains of risk
Laroi, Frank ULg

Conference (2007, March 10)

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See detailLe regard des intervenants et l'éventail des parents
Absil, Gaëtan ULg; Denis, Marie-Elise

Conference (2007, March)

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See detailRigid body attitude synchronization: a consensus approach
Sarlette, Alain ULg; Sepulchre, Rodolphe ULg; Leonard, Naomi

Conference (2007, March)

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See detailLa langue et le réel. Réflexions sur la motivation iconique
Polis, Stéphane ULg

Conference (2007, February 28)

Detailed reference viewed: 9 (0 ULg)
See detailWhen Mass Spectrometry meets Spectroscopy: A Different Perspective on Ion Photodissociation
Gabelica, Valérie ULg

Conference (2007, February 27)

Photodissociation methods are more and more widely used in analytical mass spectrometry as an alternative to collision-induced dissociation. A well known example is infrared multiphoton dissociation ... [more ▼]

Photodissociation methods are more and more widely used in analytical mass spectrometry as an alternative to collision-induced dissociation. A well known example is infrared multiphoton dissociation (IRMPD) with CO2 lasers (wavelength 10.6 µm), which is often preferred to SORI-CID in FTICR mass spectrometers. IR photons are absorbed by the vibrational modes of the ion, and this vibrational energy is redistributed all over the molecule. The fragmentation channels observed are usually the same as for CID. Recently, new possibilities offered by UV lasers of fixed wavelength (i.e. 157 nm or 193 nm) for peptide fragmentation were described. On the contrary to IRMPD, irradiation at these UV wavelengths gives rise to fragmentation channels which are unprecedented in CID, suggesting that photochemical reactions take place. The prerequisite for ion photodissociation is photon absorption. In the infrared, photon absorption results in the excitation of vibrational modes. Anharmonic coupling of the excited vibrational modes with other vibrational modes of the ion results in a rapid intramolecular vibrational energy redistribution (IVR). The energy of an IR photon is too low for the ion to dissociate (0.117 eV/photon for a 10.6 µm CO2 laser). Multiple cycles of absorption and IVR are necessary for IR photodissociation to occur (hence the term multiphoton). Because the first step in photodissociation is photon absorption, the recording of the photodissociation yield as a function of the photon wavenumber gives information on the vibrational modes of the ion. This is the basic principle of infrared spectroscopy experiments inside the mass spectrometer. This technique will be illustrated by a recent example on DNA single strands and quadruplex structures. The shifting of the vibrational frequencies corresponding to guanine C=O stretch gives information on the base pairing in the DNA ion in the gas phase. The situation is somewhat different with UV photons, which may lead to either electronic excitation of the ions or direct electron ejection. Electronic excited states may evolve in different ways: (1) Internal conversion to a vibrationally excited electronic ground state. Resulting fragments would then be similar to CID and IRMPD. This process can be multiphotonic and could be coined UVMPD. (2) Electron autodetachment, leading to the formation of radicals that can be further fragmented to obtain ECD-like or EDD-like fragments. (3) Photochemical reactions giving rise to unprecedented fragmentation channels. In all three cases, product ion yield is conditioned by photon absorption by an electronic state, meaning that UV spectroscopy of gas-phase ions can be performed with a mass spectrometer. We recently explored the effects of photon absorption on multiply charged DNA anions. Depending on the photon wavelength and on the chromophores, all three situations could be observed. Electron photodetachment is the major channel observed when using wavelengths corresponding to DNA base absorption.1,2 When irradiated at proper wavelength, chromophoric DNA ligands also give rise to electron photodetachment. UV-visible spectra of the DNA duplexes and complexes were recorded and compared with solution-phase spectra. Finally, a porphyrin ligand gives rise to specific fragmentation pathways when irradiated at 450 nm, while photodetachment is observed at 260 nm. The most recent results will be presented and discussed. 1. Gabelica, V.; Tabarin, T.; Antoine, R.; Rosu, F.; Compagnon, I.; Broyer, M.; De Pauw, E.; Dugourd, P. Electron Photodetachment Dissociation of DNA Polyanions in a Quadrupole Ion Trap Mass Spectrometer. Anal. Chem. 2006, 78 (18), 6564. 2. Gabelica, V.; Rosu, F.; Tabarin, T.; Kinet, C.; Antoine, R.; Broyer, M.; De Pauw, E.; Dugourd, P. Base-Dependent Electron Photodetachment from Negatively Charged DNA Strands upon 260-nm Laser Irradiation. J. Am. Chem. Soc. 2007, accepted for publication. [less ▲]

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See detailSecondary dispersal by dung beetles of seeds primarily dispersed by tamarins
Culot, Laurence ULg

Conference (2007, February 22)

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See detailImpact des mesures judiciaires alternatives pour les consommateurs de drogues
Fincoeur, Bertrand ULg

Conference (2007, February 21)

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See detailInternational Foundation for Research in Paraplegia
Martin, Didier ULg

Conference (2007, February 20)

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See detailL'emprunt linguistique comme marqueur de vitalité des langues
Baiwir, Esther ULg

Conference (2007, February 09)

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See detail"Ethno-évaluation" : le savoir des acteurs comme théorie de l'action
Absil, Gaëtan ULg

Conference (2007, February)

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See detail3D image analysis characterization of dried banana
Léonard, Angélique ULg; Devahastin, Sakamon; Blacher, Silvia ULg

Conference (2007, February)

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See detailTransfert d'image et hybridation post-traumatique
Hamers, Jérémy ULg

Conference (2007, February)

Detailed reference viewed: 7 (0 ULg)
See detailSuivi diachronique de l’analyse de corpus partagés
Bénel, Aurélien; Lejeune, Christophe ULg

Conference (2007, January 26)

Les anthropologues des sciences ont développé un mode d'inscription permettant le suivi de l'innovation qu'ils appellent "graphe socio-technique". Cette contribution présente les tentatives d'application ... [more ▼]

Les anthropologues des sciences ont développé un mode d'inscription permettant le suivi de l'innovation qu'ils appellent "graphe socio-technique". Cette contribution présente les tentatives d'application de ce dispositif de visualisation au suivi de l'activité sur des plateformes informatiques. Elle soulève des difficultés à la fois techniques et méthodologiques. [less ▲]

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See detailLa pression intracrânienne normale et pathologique
Martin, Didier ULg

Conference (2007, January 22)

Detailed reference viewed: 7 (2 ULg)
See detailLe néokantisme comme forme symbolique ? Merleau-Ponty et Panofsky
Cormann, Grégory ULg

Conference (2007, January 17)

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See detailLes insultes de la cour de récréation
Meunier, Deborah ULg

Conference (2007, January 12)

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See detailMonitoring an odour in the environment with an electronic nose : requirements for the signal processing
Romain, Anne-Claude ULg; Delva, Julien ULg; Nicolas, Jacques ULg

Conference (2007, January)

Artificial olfaction system (the so-called electronic nose) is a very promising tool to monitor the malodour in the field. Usual measurement techniques of odour use human olfaction or conventional ... [more ▼]

Artificial olfaction system (the so-called electronic nose) is a very promising tool to monitor the malodour in the field. Usual measurement techniques of odour use human olfaction or conventional analytical techniques. The first category represents the real odour perception but is not applicable to measure continuously bad odours in the field. The second class of techniques gives the mixture composition but not the global information representative of the odour perception. The e-nose has the potentialities to combine "the odour perception" and the "monitoring in the field". However to be able to reach that goal, the signal processing has to be adapted to work in complex environment. The research group in Arlon has more than ten years experience in the measure of environmental malodours in the field. The paper presents the minimal requirements that the group considers as essential for artificial olfaction system to become successful for this application. [less ▲]

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See detailParturition Induction in the mare. Why and when? Case Report
Ponthier, Jérôme ULg; Salciccia, Alexandra ULg; Sandersen, Charlotte ULg et al

Conference (2007, January)

INTRODUCTION Some conditions require induction of parturition: colic, severe hyperlipemia, prepubian tendon rupture, premature placental separation, hydroallantoïd, and foetal distress2,4,5. Prolonged ... [more ▼]

INTRODUCTION Some conditions require induction of parturition: colic, severe hyperlipemia, prepubian tendon rupture, premature placental separation, hydroallantoïd, and foetal distress2,4,5. Prolonged gestation is not a good indication1,4. Protocols using oxytocin, prostaglandins or corticosteroids can induce parturition2,3,4,5. Most induction protocols use low doses of oxytocin2,3,5. OBJECTIVE On the basis of a clinical case, this poster will discuss the indications, the methods and the risks of parturition induction in the mare. CLINICAL CASE A pony mare at day 310 of pregnancy is presented for colic with poor prognosis. The foetal parameters are good and the cervix begins to open. There is no milk in the udder. The decision to save the foal is taken and parturition is induced by one oxytocin bolus (20 I.U./IV) followed by an oxytocin infusion (100 I.U. in 1000ml saline). After assisted foaling, the foal rises and sucks commercial colostrum within 30 minutes. Soon, the foal becomes depressed and, despite treatment with commercial plasma, tube feeding and antibiotics, dies at day 2. DISCUSSION This case required immediate induction of foaling, which was achieved by administration of high doses of oxytocin. Commonly, high doses of oxytocin induce dystocia because the foal has no time to move to correct (dorso-sacral) presentation1,2,5. The risks for the foal include absence of colostrum and foetal immaturity1,2,3,4,5. Even after day 300, the prognosis is poor1,2,3,4. A good prognostic indicator of the foal’s maturity (lung, and other systems) is the electrolytes concentration in the mother’s milk2,4. These protocols should be used when foetal maturity is ascertained or as last resort1,2,3,4. CONCLUSIONS Foaling induction is risky for dystocia and foal outcome. It should be reserved to cases where foal’s maturity can be assessed. [less ▲]

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See detailAbstract numeration systems and recognizability
Charlier, Emilie ULg

Conference (2007, January)

In this talk, I will present some results concerning multiplication by a constant in an abstract numeration system built on a bounded language. More precisely, we will show that this operation does not ... [more ▼]

In this talk, I will present some results concerning multiplication by a constant in an abstract numeration system built on a bounded language. More precisely, we will show that this operation does not preserve regularity, and therefore cannot be computed by a finite automaton. [less ▲]

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See detailCutting planes from lattice-point-free polyhedra
Louveaux, Quentin ULg

Conference (2007, January)

In this talk, we generalize the concept of a split (that leads to split cuts) to any lattice-point-free polyhedron. We show how we can generate cutting planes for a polyhedron from these objects ... [more ▼]

In this talk, we generalize the concept of a split (that leads to split cuts) to any lattice-point-free polyhedron. We show how we can generate cutting planes for a polyhedron from these objects. Associated to any lattice-point-free polyhedron, we define a "split-dimension" (which is equal to 1 in the case of a split in the usual sense). We then consider the operation of adding to a polyhedron all cutting planes that we can obtain from considering all the lattice-point-free polyhedra with a split-dimension lower or equal to d. We call the obtained object the "d-dimensional split closure" of the initial polyhedron. We discuss whether this object is again a polyhedron or not. As an important illustration, we focus on objects of split-dimension equal to 1 or 2. [less ▲]

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See detailInterest of DOC in the study of consciousness
Vanhaudenhuyse, Audrey ULg

Conference (2007)

Detailed reference viewed: 4 (0 ULg)
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See detailPhysiopathologie des troubles psychosomatiques du nourrisson
Battisti, Oreste ULg

Conference (2007)

Une mère rencontre son enfant, les intervenants se rencontrent. Les aspects suivants sont abordés: la santé pré et post-natale; évaluation des défaillanes précoces; les besoins des services judiciaires ... [more ▼]

Une mère rencontre son enfant, les intervenants se rencontrent. Les aspects suivants sont abordés: la santé pré et post-natale; évaluation des défaillanes précoces; les besoins des services judiciaires; manifestations somatiques d'une triade en souffrance; attents et besoins de gynécologues et des pédiatres. [less ▲]

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See detailLe tétras lyre dans les Hautes-Fagnes : quarante ans de suivis - dix ans d'actions.
Poncin, Pascal ULg; Keulen, Christine; Loneux, Michèle ULg et al

Conference (2007)

Detailed reference viewed: 8 (0 ULg)
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See detailRegulation by androgens of the expression of the EGF receptor family members in prostate cancer cells
Pignon, Jean-Christophe; Delacroix, Laurence; Nolens, Grégory et al

Conference (2007)

Detailed reference viewed: 8 (0 ULg)
See detailUitspraakonderwijs en communicatieve aanpak: nog steeds een onmogelijke liefde?
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2007)

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See detailL’évolution du peuplement herpétologique en Région wallonne (Belgique)
Jacob, Jean-Paul; Percsy, Christiane; De Wavrin, Hellin et al

Conference (2007)

Detailed reference viewed: 24 (0 ULg)
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See detailLate Recurrence of Ischemic Mitral Regurgitation after Restrictive Annuloplasty: Is LV Remodeling the Sole Mechanism?
Sénéchal, M; Magne, Julien ULg; Dumesnil, JG et al

Conference (2007)

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See detailProsody and foreign language learning
Rasier, Laurent ULg

Conference (2007)

Detailed reference viewed: 6 (0 ULg)
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See detailCathéter épicutanéo-cave double voie versus simple voie: une étude randomisée chez le nouveau-né prémature
Marion, W.; Battisti, Oreste ULg; Anthopoulou, N. et al

Conference (2007)

Detailed reference viewed: 82 (6 ULg)
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See detailNavigation neurochirurgicale basée sur des modèles biomécaniques
Vigneron; Boman, Romain C.; Ponthot, Jean-Philippe et al

Conference (2007)

Detailed reference viewed: 8 (1 ULg)
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See detailComparison of ENFA and GLM modelling for summer habitat suitability of the sperm whale in the northwestern Mediterranean Sea
Praca, Emilie; Gannier, Alexandre; Das, Krishna ULg et al

Conference (2007)

Detailed reference viewed: 18 (2 ULg)
See detailA West Florida Shelf ROMS Nested into HYCOM: Ensemble-based Assimilation of HF-Radar Surface Currents and a 2005 Red Tide Case Study with Simulated Drifters
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Weisberg, R. H.

Conference (2007)

A West Florida Shelf (WFS) model is constructed by nesting the Regional Ocean Model System (ROMS) in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) to include both local and deep-ocean forcing ... [more ▼]

A West Florida Shelf (WFS) model is constructed by nesting the Regional Ocean Model System (ROMS) in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) to include both local and deep-ocean forcing, particularly the Gulf of Mexico Loop Current (LC). Hindcast experiments from 2004 to 2006 are presented and compared to observed temperature (moorings and BSOP profiling floats), ADCP velocity time series and HF-Radar surface currents. Two different mixing schemes (Mellor Yamada level 2.5 and K-Profile Parameterization, KPP) are tested and the importance of the vertical resolution for mixing is addressed. The model results of those different configurations are compared to temperature observations on the shelf. Results obtained with the Mellor Yamada scheme are closer to observations during winter (negative buoyancy flux and strong winds) while in summer (positive buoyancy flux and in general weaker wind) the KPP scheme produces more realistic results. Given the present HYCOM configuration we assessed the benefit of nesting ROMS in HYCOM compared to nesting ROMS in climatology. The model solutions on the shelf were compared to various in situ data. The model performed best when using the HYCOM boundary values. Simulated trajectories for drifters deployed off Tampa Bay and Sarasota were used to address the evolution of Karenia brevis concentrations during the 2005 red tide. Near surface drifters were advected offshore, whereas drifters deployed in the bottom Ekman layer matched the subsequently observed Karenia brevis distributions, showing the importance of the 3D structure of coastal ocean currents for red tide on the WFS. As a first attempt at assimilating CODAR surface currents we used an ensemble simulation carried out under different wind forcings to estimate the error covariance of the model state vector and the covariance between the ocean currents and the wind. Improvements were obtained for the modeled currents, not only at the surface, but also at depth. [less ▲]

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See detailDifferent approaches to measure environmental odours emitted by landfill areas
Romain, Anne-Claude ULg; Delva, Julien ULg; Nicolas, Jacques ULg

Conference (2007)

This paper presents different methods to assess the odour emission and the odour annoyance in the surroundings. It is shown, on the example of landfill areas and composting facilities, that chemical ... [more ▼]

This paper presents different methods to assess the odour emission and the odour annoyance in the surroundings. It is shown, on the example of landfill areas and composting facilities, that chemical analyses are helpful to identify key compounds of the odour release, and to set up the specification of a monitoring instrument. Sensitive methods, like dynamic olfactometry or sniffing team investigation, are mainly applicable to provide a global odour plume or an average annoyance zone. And the electronic nose can supply a warning signal to the plant manager or a real time estimation of the annoyance zone. [less ▲]

Detailed reference viewed: 33 (13 ULg)
See detailTowards a carbon balance at the Lonzée crop site
Moureaux, Christine ULg; Debacq, Alain ULg; Suleau, Marie ULg et al

Conference (2007)

Detailed reference viewed: 12 (4 ULg)
See detailDetecting awareness in impaired states of consciousness
Vanhaudenhuyse, Audrey ULg

Conference (2007)

Detailed reference viewed: 2 (1 ULg)
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See detailComparative pharmacokinetics of two intravenous dosage rates of tiludronate in healthy adult horses
Delguste, Catherine ULg; Amory, Hélène ULg; Guyonnet, Jérôme et al

Conference (2007)

Plasma and urine pharmacokinetics of tiludronate administered once daily as an intravenous bolus of 0.1 mg/kg for ten consecutive days (group 1, n=6) was compared to a single slow infusion of 1 mg/kg ... [more ▼]

Plasma and urine pharmacokinetics of tiludronate administered once daily as an intravenous bolus of 0.1 mg/kg for ten consecutive days (group 1, n=6) was compared to a single slow infusion of 1 mg/kg (group 2, n=6) in healthy adult horses. Plasma samples were collected at regular intervals for a period of 16 and 7 days in groups 1 and 2 respectively. Continuous urine collection for determination of cumulative urinary excretion of tiludronate was performed during 16 and 7 days in groups 1 and 2 respectively, and over 24-hour periods every 10 days until 60 days after the last tiludronate administration in both groups. Tiludronate concentrations were obtained in all plasma and urine samples using HPLC with UV detection. Plasma pharmacokinetic parameters were determined using a noncompartmental approach. Group 1 mean (± SD) AUCss was 3.76 (±0.698) mg.h.L-1 and group 2 mean (± SD) AUCtot was 39.07 (±3.699) mg.h.L-1. Mean (± SD) clearance (Cl) was 0.027 (±0.0042) and 0.026 (±0.0022) L.h-1.kg-1 in groups 1 and 2, respectively. Neither the dose corrected AUC (p=0.724) nor the Cl (p=0.528) were statistically different between groups. Relative plasma bioavailability (infusion versus bolus) was 103%. Cumulative urine tiludronic acid excretion could not be compared between groups due to analytical limitations (LOQ of 0.025 mg.L-1), which led to numerous missing data particularly in group 1, and an inability to conduct appropriate statistical and pharmacokinetic analyses. In conclusion, both dosage rates of tiludronate were considered bioequivalent with regards to plasma pharmacokinetics. [less ▲]

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See detailEcological Impacts of Invasive Plant Species
Vanderhoeven, Sonia ULg

Conference (2007)

Detailed reference viewed: 9 (0 ULg)
See detailMeasurement-induced spatial modulation of spontaneous decay and photon arrival times
von Zanthier, J.; Bastin, Thierry ULg; Agarwal, G. S.

Conference (2007)

Detailed reference viewed: 1 (0 ULg)
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See detailSynthèse de chélateurs bifonctionnels en vue du développement d’agents de contraste pour l’IRM
Thonon, David ULg; Paris, Jérôme; Jacques, Vincent et al

Conference (2007)

Detailed reference viewed: 6 (1 ULg)
See detailHybrid Model for Kp prediction, combining solar wind and magnetometer data
Kutiev, Ivan; Andonov, B.; Muhtarov, P. et al

Conference (2007)

Detailed reference viewed: 18 (0 ULg)
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See detailLe rôle de l’ingénieur en imagerie médicale
Verly, Jacques ULg; Vigneron, Lara M.; Boman, Romain C. et al

Conference (2007)

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See detailA new interpretation of the Io UV footprint morphology
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2007)

The electromagnetic interaction between Io and the jovian magnetic field leads to an auroral UV footprint consisting of single or multiple UV spots in both jovian hemi- spheres. According to current ... [more ▼]

The electromagnetic interaction between Io and the jovian magnetic field leads to an auroral UV footprint consisting of single or multiple UV spots in both jovian hemi- spheres. According to current theories, the perturbation induced by the motion of Io in the plasma torus propagates along the field lines in the form of Alfvén waves and finally causes electron precipitation in the jovian ionosphere. The occurrence and mul- tiplicity of the secondary spots appear to be related to the position of Io in the plasma torus and have been attributed to partial reflections of the Alfvén waves on the torus boundaries. Nevertheless, the discrepancies between the predicted inter-spot distances and the measurements were found difficult to explain. Additionally, some crucial con- figurations of Io in the torus had never been observed. Our recent HST/ACS observations of the footprint in so far unexplored Io-plasma torus configurations lead to the finding of a new feature in the footprint: a faint spot upstream of the main spot. The observations of this precursor emission, together with the inconsistencies related to the inter-spot distances, suggest a new interpretation of the footprint morphology. We propose that the precursor and the first secondary spot stem from the same mechanism and we interpret them as the counterparts of the main spot occurring in the opposite hemisphere. [less ▲]

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See detailClimatic differentiation of the invasive alien plant Senecio inaequidens (Asteraceae) during invasion
Monty, Arnaud ULg; Mahy, Grégory ULg

Conference (2007)

Despite the problems they cause, biological invasions represent a great opportunity to study large-scale plant evolution, e.g. in response to changing climate. Senecio inaequidens DC. is an herbaceous ... [more ▼]

Despite the problems they cause, biological invasions represent a great opportunity to study large-scale plant evolution, e.g. in response to changing climate. Senecio inaequidens DC. is an herbaceous perennial originating from South Africa. It was introduced as a wool alien in a few precise locations about one century ago and after a lag phase of several decades, started to spread rapidly throughout Europe and its contrasted climate. Our study uses common garden experiments to assess the differentiation of the species along both altitudinal and climatic gradients. Life history traits are measured and linked to climatic conditions of source populations. Results show that the species evolved along a climatic gradient from the Mediterranean to the high Pyrenean. This along-invasion differentiation can be linked to mean temperature evolution along the gradient and shows how an introduced species can potentially develop adaptations to new encountered thermic conditions in a length of time of several decades. How understanding the adaptive response of a plant to new climatic conditions will help anticipating the potential response of the flora to climate change is discussed. [less ▲]

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See detailOptimization of drug-cyclodextrin complexation reaction by a static supercritical carbon dioxide method
Brion, Michael; Nizet, Dominique; Piel, Géraldine ULg et al

Conference (2007)

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See detailA New Discontinuous Galerkin Formulation for Kirchhoff-Love Shells
Noels, Ludovic ULg; Radovitzky, Raul

Conference (2007)

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See detailPARTICIPATION OF ULG STUDENTS TO THE SSETI MICROSATELLITE PROGRAMME USING SAMCEF
Bolland, M.; COLLIGNON, G.; VANDENPLAS, X. et al

Conference (2007)

The objective of this presentation is to discuss the participation of students at the University of Liège to the educational spacecraft project SSETI-ESEO proposed by the European Space Agency. SSETI ... [more ▼]

The objective of this presentation is to discuss the participation of students at the University of Liège to the educational spacecraft project SSETI-ESEO proposed by the European Space Agency. SSETI students are now mainly involved in the ESEO satellite for which the University of Liège is in charge of the MECH work package. The students have to propose a design for the structure of the solar panels (including the geometry and materials) and their deployment and pointing mechanisms (including electrical circuits, motors, hinges and actuators). Through detailed finite element computations in the SAMCEF software, they have to verify the structural integrity of the panels during the launch phase and to guarantee a safe deployment once on-orbit. Another task is to ensure an appropriate orientation of the solar panels to collect the maximum power from the sun. An industrial partner specialized in the development of computer-aided engineering solutions, SAMTECH, and a research center, Liège Space Center (CSL), also bring their expertise to the project. [less ▲]

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See detailLEODIUM project and student space activities at the University of Liege
Vandenrijt, Jean-François ULg; Rochus, Pierre ULg; Kerschen, Gaëtan ULg et al

Conference (2007)

the origin of the LEODIUM project which stands for Low Earth Orbit Demonstration of Innovations in University Mode. This project aims to create student pico- or nano-satellites. There is a strong ... [more ▼]

the origin of the LEODIUM project which stands for Low Earth Orbit Demonstration of Innovations in University Mode. This project aims to create student pico- or nano-satellites. There is a strong motivation coming from the students and from the academic members to promote space. Being unexperienced in complete satellite design, as a first step in this direction, we started working with the ESA funded SSETI association. At the moment, two teams of students are working on SSETI satellites. One is working as the MECH team which is in charge of the design of the sun-pointing solar panels of the European Student Earth Orbiter (ESEO) satellite mechanisms, the other team is working on the phase-A studies of the Narrow Angle Camera (NAC) which will be the core payload of the European Student Moon Orbiter (ESMO) satellite, both in collaboration with local industrials. The students are mainly working on ESEO and ESMO as part of their master thesis. In addition to that, two PhD students are in charge of the coordination of the teams (one for the ESEO team and another for the ESMO team). They will also be the link between previous and new students every times an overlap will occur and ensure that information is not lost during the transition. In this paper, we will describe the current design and the achievements on the ESEO solar panels and the ESMO NAC camera. Explanation will also be given on how the collaboration between the local student and the SSETI association is managed. Finally, we will briefly introduce the prospective for the LEODIUM project. [less ▲]

Detailed reference viewed: 63 (7 ULg)
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See detailNew methodology for generating realistic data for evaluation of performance of radar STAP algorithms
Ries, Philippe; Tey, Shuwen; Verly, Jacques ULg et al

Conference (2007)

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See detailPhase I/IIclinical trial of local GM-CSF application in patients with cervical HPV-associated low grade squamous intraepithelial lesions
Hubert, Pascale ULg; Doyen, Jean ULg; Chapelle, X. et al

Conference (2007)

Background: Quantitative and functional alterations of professional antigen-presenting cells (APC) in SIL suggest that these lesions may have a diminished capacity to capture viral antigens. Moreover, GM ... [more ▼]

Background: Quantitative and functional alterations of professional antigen-presenting cells (APC) in SIL suggest that these lesions may have a diminished capacity to capture viral antigens. Moreover, GM-CSF (whose production is decreased in HPV-transformed keratinocytes) is an essential factor for the migration of APC in cervical (pre)neoplastic lesions formed in vitro and transplanted in vivo on mouse. In this study we performed a phase I/II clinical trial in order to determine whether a local application of GM-CSF on cervical low-grade squamous intraepithelial lesions (LSIL) might increase the recruitment of APC into the epithelium and indirectly the viral antigen presentation to the immune system. Methods: Fifteen patients with LSIL (10 GM-CSF and 5 placebo) were enrolled in this study. Patients received 4 GM-CSF applications (or placebo gel) and were followed during 6-7 months. APC infiltration was quantified by immunostaining with anti-CD1a mAb. Cellular immune response was evaluated by using an IFN-gamma intracellular staining on PBMC stimulated in vitro with the E7 HPV16 protein and L1 HPV16 Virus-like particles (VLP). Hybrid capture was performed to semi-quantify the viral DNA in cervical brush specimens. Results: GM-CSF applications were well tolerated in all patients. No difference in the cytological/histological and viral parameters assessed at 2 and 6 months after the last application was observed between the GM-CSF and the placebo group. An increased number of CD1a+ APC was observed in 6/10 patients treated by GM-CSF compared to 1/5 patient in the placebo group. There was an increased immune response against HPV in the GM-CSF group showed by NK and T cells producing IFN-gamma. [less ▲]

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See detailLong term behaviour of the Boom Clay: influence of viscosity on the pore pressure distribution
Coll, Cécile; Charlier, Robert ULg; Li, Xiang Ling et al

Conference (2007)

Detailed reference viewed: 38 (6 ULg)