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See detailRange-dependence compensation in airborne bistatic STAP radar for partially-calibrated conformal antenna arrays
Ries, Philippe; Lapierre, Fabian D.; Lesturgie, Marc et al

Conference (2008)

Detailed reference viewed: 9 (0 ULg)
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See detailProduction of alarm pheromone by developing aphids varies in response to their social environment
Verheggen, François ULg; Mescher, Mark; Haubruge, Eric ULg et al

Conference (2008)

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to ... [more ▼]

Aphid alarm pheromone—the volatile sesquiterpene (E)-β-farnesene (Eβf) in most species—is released in response to predation and other stresses and typically causes nearby aphids who receive the signal to cease feeding, drop from their host plant, and disperse. Because aphid alarm pheromone confers apparent fitness benefits on recipients while its production and release likely entail costs for the emitting aphid, it could be adaptive for aphids to regulate their Eβf production in response to variation in the social environment. To explore this possibility we compared the production of Eβf by Acyrthosiphon pisum (Harris) individuals reared from first-instar larvae to the adult stage in isolation to that of individuals reared among conspecifics or among individuals of a different aphid species, Myzus persicae (Sulzer). Levels of EβF produced in each treatment were assayed by GC-FID quantification of EβF in volatiles collected from crushed aphids. Production of EβF by A. pisum reared in isolation (14.4ng/aphid) was significantly lower than that of aphids reared in a colony of conspecifics (49.1ng/aphid), reared in a M. persicae colony (31.5ng/aphid) or reared among conspecifics of another aaphid clone (52.7ng/aphid). Though A. pisum individuals in our experiments produced less EβF when reared among M. persicae than among conspecifics, this difference was not statistically significant. In a separate experiment we reared A. pisum individuals in isolation and exposed them to the odor of conspecifics. Under these conditions, EβF production was similar to that of aphids reared among conspecifics, suggesting that aphids use volatile cues to assess their social environment and regulate their production of alarm pheromone accordingly. [less ▲]

Detailed reference viewed: 18 (3 ULg)
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See detailBlinking to threat is no sign of consciousness
Vanhaudenhuyse, Audrey ULg

Conference (2008)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailLe genre et la diversité : enjeux et opportunités
Cornet, Annie ULg

Conference (2008)

Detailed reference viewed: 23 (5 ULg)
Peer Reviewed
See detailMechanical characterization of porous structures by the combined use of micro-CT and in-situ loading
Kerckhofs, Greet ULg; Schrooten, Jan; Elicegui, Laida et al

Conference (2008)

Detailed reference viewed: 9 (2 ULg)
See detailQuantum imaging with trapped ions
von Zanthier, J.; Thiel, C.; Bastin, Thierry ULg et al

Conference (2008)

Detailed reference viewed: 3 (0 ULg)
See detailVanadium oxide-based mesoporous films as positive electrode material in Li-ion batteries
Krins, Natacha ULg; Caes, Sébastien ULg; Arrebola, José-Carlos et al

Conference (2008)

Detailed reference viewed: 4 (0 ULg)
See detailTotal Electron Content monitoring using triple frequency GNSS data: a three-step approach
Spits, Sandrine; Warnant, René ULg

Conference (2008)

Detailed reference viewed: 16 (2 ULg)
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See detailDevonian mio-and megaspores in Western Gondwana
Steemans, Philippe ULg; Breuer, Pierre; Miller, M.

Conference (2008)

Detailed reference viewed: 17 (0 ULg)
See detailGeneration of arbitrary Dicke states in remote qubits using linear optics
Maser, A.; Thiel, C.; Schilling, U. et al

Conference (2008)

Peer Reviewed
See detailEffects of fish size on agonistic sounds in the clownfish Amphiprion akallopisos : implications for the role of the swimbladder in the sound production mechanism?
Colleye, Orphal ULg; Vandewalle, Pierre ULg; Frederich, Bruno ULg et al

Conference (2008)

Clownfishes (i.e. Amphiprion akallopisos) are territorial fishes that use sound production to defend their anemone territory. They live in social groups which display a size-based dominance hierarchy. In ... [more ▼]

Clownfishes (i.e. Amphiprion akallopisos) are territorial fishes that use sound production to defend their anemone territory. They live in social groups which display a size-based dominance hierarchy. In such a system, agonistic interactions are frequent and play an important role in the social organization. In addition, these interactions are often associated with sounds. In this study, we compared the sonic features between individuals of different sizes and in different sexual status (juvenile, male and female). The existent relationship between fish size and swimbladder size also implied to seek the swimbladder role in the sound production. Sound analyses showed that juveniles, males and females had distinct sounds in the dominant frequency and pulse duration. These differences were however not in relation to the sexual state; influence of sex on sonic features being mainly the result of a size dimorphism between sexes. Differences in calls were therefore due to the respective size of the emitter. This observation highlighted the role of the swimbladder as a resonance chamber. This role was also reinforced because the experimental filling of the swimbladder with physiological liquid significantly modified the acoustic features. In A. akallopisos, frequency and pulse duration are directly related to swimbladder size, and thus to fish size. This relationship provides strong evidence that the emitter could be identified by its calls. [less ▲]

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See detailExtraction, caractérisation et activités antimicrobiennes de quelques huiles essentielles des plantes du haut et moyen atlas du Maroc
Dahak, K.; Lakhmili, S.; Wathelet, Jean-Paul ULg et al

Conference (2008)

Notre étude a porté sur l'extraction des huiles essentielles (HE) de certaines plantes Marocaines du haut Atlas: région de Marrakech (Citrus aurantium, Lavandula dentata et Feoniculum vulgare) et du moyen ... [more ▼]

Notre étude a porté sur l'extraction des huiles essentielles (HE) de certaines plantes Marocaines du haut Atlas: région de Marrakech (Citrus aurantium, Lavandula dentata et Feoniculum vulgare) et du moyen Atlas: région d’azilal (Ouaouizerth) (Laurus nobilis et Lavandula officinalis). [less ▲]

Detailed reference viewed: 117 (2 ULg)
See detailVolatile blends and oxylipins profiles in potato leaves (Solanum tuberosum L.) exposed to insects infestations and mechanical wounding.
Gosset, V.; Göbel, Cornelia; Harmel, N. et al

Conference (2008)

Detailed reference viewed: 16 (4 ULg)
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See detailConstruction et droit de la consommation: propos introdutifs
Kohl, Benoît ULg

Conference (2008)

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See detailHeat pumping and reversible air conditioning : how to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg et al

Conference (2008)

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced ... [more ▼]

Substituting a heat pump to a boiler may save more than 50% of primary energy, if electricity is produced by a modern combined cycle power plant (and even more if a part of that electricity is produced using renewable sources). Two of the most attractive heat pumps applications consist in recovering the heat rejected by the condenser of an existing chiller and in using this chiller in reversible mode. This is the topic of the IEA-ECBCS Annex 48 project (“Heat pumping and reversible air conditioning”). An overview of the project is presented and the work of the different participants is briefly explained. Case studies are also briefly presented and more details are given on one of them. [less ▲]

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See detailFrom strokes to model: a bottom-up approach for sketching activities analysis. Workshop.
Safin, Stéphane ULg; Juchmes, Roland ULg; Elsen, Catherine ULg et al

Conference (2008)

This paper proposes a framework for sketches analysis that could be useful for sketch-based interfaces development, in the particular context of preliminary activity-centred design. We will first describe ... [more ▼]

This paper proposes a framework for sketches analysis that could be useful for sketch-based interfaces development, in the particular context of preliminary activity-centred design. We will first describe our previous works on sketch-based support tools for the preliminary design phases and the context of these researches. The next chapter declares the concrete objectives of our approach, then the methodology of sketches analysis we propose is presented with a concrete example, and finally the last section is dedicated to the expected results and specifications of a sketch-based support tool that would follow our framework. [less ▲]

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See detailThe IMA-CNMNC dominant-constituent rule revisited and extended
Hatert, Frédéric ULg; Burke, Ernst

Conference (2008)

Detailed reference viewed: 2 (0 ULg)
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See detailLong term Subjective Evaluation of the Effects of Vocal Therapy on Dysfunctional Dysphonia.
Morsomme, Dominique ULg; Faurichon de la Bardonnie, Marie; Verduykt, Ingrid et al

Conference (2008)

The goal of this study is the evaluation of the long-term efficiency of voice therapy (> to 6 months) in the treatment of dysfunctional dysphonia . Four subjective measurements were performed on 29 ... [more ▼]

The goal of this study is the evaluation of the long-term efficiency of voice therapy (> to 6 months) in the treatment of dysfunctional dysphonia . Four subjective measurements were performed on 29 patients: -A visual analogical scale (VAS) ranging from 0 (not efficient at all) to 100 (very efficient). -A question “Is the speech therapy still efficient?” Yes or no. -The G(rade), R(oughness) and B(reathiness) parameters from the GRBAS perceptual scale (evaluated by the patient measured on VAS). -The Voice Handicap Index-10 (VHI-10). The results show that 76% of the patients consider that the voice therapy is still efficient. In regard to G.R.B., we observe a high score for G (median: 77). The score for R is lower (median R: 12). G and R are significantly correlated (r Spearman=0.516, p=0.004), but the satisfaction of the vocal quality does not seem correlated to B (p=0,251, NS). The median values of VHI 10 shows a significant improvement from 15 to 10 (p=0,017). In addition, the correlations between the judgment on the treatment efficiency and vocal quality (r=0,623, p<0,001) and between VHI-10 and the length of treatment (r=0.416, p=0,035) are significant. The first correlation shows that the most satisfied patients when it comes to the vocal therapy are also the most satisfied when it comes to their vocal quality. The second correlation specifies that the longer the treatment, the higher the grade of vocal handicap. Voice therapy is efficient in the long term and is worth to be prolonged for difficult cases [less ▲]

Detailed reference viewed: 25 (0 ULg)
See detailWave-particle duality in a two atom interferometer
Schilling, U.; Thiel, C.; Bastin, Thierry ULg et al

Conference (2008)

Detailed reference viewed: 3 (1 ULg)
See detailVenus night airglow and implications for thermospheric composition and dynamics
Gérard, Jean-Claude ULg; Saglam, Adem ULg; Cox, Cédric ULg et al

Conference (2008)

Spatially resolved spectra of the NO delta and gamma ultraviolet bands have been obtained from 80 to 130 km on the Venus night side with the SPICAV instrument on board Venus Express. This NO airglow ... [more ▼]

Spatially resolved spectra of the NO delta and gamma ultraviolet bands have been obtained from 80 to 130 km on the Venus night side with the SPICAV instrument on board Venus Express. This NO airglow emission results from radiative recombination of oxygen and nitrogen atoms created on the dayside and transported by the subsolar to antisolar global circulation. Spectral images of the O2 (1 â delta g ) at 1.27 µm have also been made with the VIRTIS-M instrument both at nadir and at the limb. The O2 (1 â g ) emission is produced by three-body recombination of O atoms giving rise to an airglow layer near 96 km. The brightness of both emissions changes by over an order of magnitude. They also show variations in the altitude of the peak emission, with larger variability of the NO airglow. The characteristics of both airglows and their implications on global circulation and vertical transport on the nightside will be discussed. Concurrent observations of both limb airglows will be described. It will be shown that limb observations of the vertical and latitudinal distribution of the 1.27 µm emission make it possible to remotely determine the density of atomic oxygen in the upper mesosphere and improve current atmospheric models. One-dimensional models of the O and N distributions will be presented and global properties of the 1-D parameterization of turbulent transport will be discussed. [less ▲]

Detailed reference viewed: 29 (1 ULg)
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See detailEvolution de l’économie rurale en Hainaut
Duquesne, Brigitte ULg

Conference (2008)

Detailed reference viewed: 10 (1 ULg)
Peer Reviewed
See detailImpact of Prosthesis-Patient Mismatch on Short-term Mortality Following Mitral Valve Replacement.
Magne, Julien ULg; Mathieu, P; Dumesnil, JG et al

Conference (2008)

Detailed reference viewed: 4 (0 ULg)
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See detailImprovement of He ion induced SiGe layer relaxation by a thin Si:C layer
Buca, D.; Trinkaus, H.; Holländer, B. et al

Conference (2008)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailPraktijkgerelateerd contrastief onderzoek naar vreemdetaalverwerving
Hiligsmann, Philippe; Baelen, Mélanie; Leloup, Anne-Lore et al

Conference (2008)

Detailed reference viewed: 20 (0 ULg)
See detailForesterie communautaire : les silences de la loi gabonaise
Vermeulen, Cédric ULg

Conference (2008)

Detailed reference viewed: 12 (2 ULg)
Peer Reviewed
See detailThermo-hydro-mechanical simulation of Atlas in situ large-scale test in Boom clay
François, Bertrand ULg; Laloui, Lyesse

Conference (2008)

Detailed reference viewed: 11 (0 ULg)
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See detailLe champ d'application de la loi Breyne
Kohl, Benoît ULg

Conference (2008)

Detailed reference viewed: 4 (0 ULg)
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See detailOUFTI-1: The CubeSat developed at the University of Liège, Belgium
Galli, S.; Pisane, Jonathan ULg; Ledent, P. et al

Conference (2008)

Detailed reference viewed: 151 (23 ULg)
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See detailProsody in second language acquisition: production and perception
Rasier, Laurent ULg

Conference (2008)

Detailed reference viewed: 12 (0 ULg)
Peer Reviewed
See detailDisturbed sense of agency in checking symptoms
Belayachi, Sanaa ULg

Conference (2008)

Detailed reference viewed: 14 (0 ULg)
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See detailLa mondialisation multiple des musiques populaires
Pirenne, Christophe ULg

Conference (2008)

Detailed reference viewed: 22 (1 ULg)
See detailDownscaling of the global HYCOM to the Cariaco basin (Venezuela) using ROMS
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Weisberg, R. H.

Conference (2008)

A high-resolution (1/60 degree), three-dimensional numerical circulation model of the Cariaco basin (Venezuela) is constructed by nesting the Regional Ocean Modeling System (ROMS) in the 1/12 degree ... [more ▼]

A high-resolution (1/60 degree), three-dimensional numerical circulation model of the Cariaco basin (Venezuela) is constructed by nesting the Regional Ocean Modeling System (ROMS) in the 1/12 degree global Hybrid Coordinate Ocean Model (HYCOM). The Cariaco basin is a semi-enclosed trench located along the coast of Venezuela. Its maximum depth is about 1400 m, and it is connected to the open ocean by two shallow passages: the Centinela channel in the northwest (146 m depth) and the Tortuga channel in the northeast (135 m depth). The main objective of this work is to improve our knowledge of the Cariaco basin dynamics, and to understand how the basin is influenced by the Caribbean Sea. The nesting of the Cariaco model in HYCOM is therefore crucial for these analyses. First, the annual cycle of the basin is described, using the results from a 2004 hindcast. Then, two modes of interaction between the basin and the open ocean are studied: (i) the meanders and eddies that travel westward with the Caribbean Current, and (ii) a subsurface eastward current that flows along the South America north coast. The ventilation of the basin through its channels is analyzed by studying the annual variations of the thermocline depth in the basin channels. In addition to the improved knowledge of the Cariaco basin circulation, which can help to better understand the climate of the past through paleoceanographic studies, this work is also an example of the feasibility of one of the objectives of GODAE: downscaling from a large-scale model to a regional model. In particular, the nesting ratio of 5 used in this work (from 9 km down to 1.82 km) demonstrates that a high-resolution model can be successfully nested in HYCOM. [less ▲]

Detailed reference viewed: 49 (3 ULg)
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See detailTransfer in interlanguage phonology: the case of prosody
Rasier, Laurent ULg

Conference (2008)

Detailed reference viewed: 41 (0 ULg)
See detailIonospheric Products and Services from the Regional Warning Centers of the International Space Environment Service (ISES) for GNSS Users
Kunches, J.; Terkildsen, M.; Stanislawska, I. et al

Conference (2008)

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See detailEvolution de l’économie agricole en Province de Liège
Duquesne, Brigitte ULg

Conference (2008)

Detailed reference viewed: 18 (9 ULg)
See detailOperational monitoring of multi-qubit entanglement classes via tuning of local operations
Bastin, Thierry ULg; Thiel, C.; von Zanthier, J. et al

Conference (2008)

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See detailRisk-aware decision making and dynamic programming
Defourny, Boris ULg; Ernst, Damien ULg; Wehenkel, Louis ULg

Conference (2008)

This paper considers sequential decision making problems under uncertainty, the tradeoff between the expected return and the risk of high loss, and methods that use dynamic programming to find optimal ... [more ▼]

This paper considers sequential decision making problems under uncertainty, the tradeoff between the expected return and the risk of high loss, and methods that use dynamic programming to find optimal policies. It is argued that using Bellman's Principle determines how risk considerations on the return can be incorporated. The discussion centers around returns generated by Markov Decision Processes and conclusions concern a large class of methods in Reinforcement Learning. [less ▲]

Detailed reference viewed: 112 (14 ULg)
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See detailEnglish and Spanish Size Noun-constructions, a locus of ongoing grammaticalization
Brems, Lieselotte ULg; Verveckken, Katrien

Conference (2008)

Detailed reference viewed: 8 (5 ULg)
See detailLes marqueurs de l'alcoolisme
Charlier, Corinne ULg

Conference (2008)

Detailed reference viewed: 17 (1 ULg)
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See detailLarge scale network and restoration of peatbogs and wetlands in Southern Belgium
Dufrêne, Marc ULg; Dierstein, Axelle; Frankard, Philippe et al

Conference (2008)

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See detailMultidisciplinary approach to study of design cognitive process: the case of human errors in architectural preliminary design
Safin, Stéphane ULg; Leclercq, Pierre ULg; Blavier, Adelaïde ULg

Conference (2008)

This contribution aims to show a multidisciplinary method to understand and formalize design process, from a cognitive point of view, in the particular case of human errors in architectural preliminary ... [more ▼]

This contribution aims to show a multidisciplinary method to understand and formalize design process, from a cognitive point of view, in the particular case of human errors in architectural preliminary design process. We first emphasize the importance of error detection and recovery in the sketching phase in architecture. After the description of our methodology, we explain the general theory and model on human error, the short study we made and our proposition of a model on hu- man error in architectural design. We finally conclude by giving some first re- quirements from this model in order to improve to the development of sketch- based CAD tools. [less ▲]

Detailed reference viewed: 46 (2 ULg)
See detailThermocline characterization on modeled and observed temperature profiles: a technique for model error evaluation
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg

Conference (2008)

The thermocline position in the water column is an important variable in hydrodynamic modeling. Its characterization allows to verify the model accuracy, and analyze the parameter choice made by the ... [more ▼]

The thermocline position in the water column is an important variable in hydrodynamic modeling. Its characterization allows to verify the model accuracy, and analyze the parameter choice made by the modeler, such as the choice of the turbulence closure. A correct representation of the surface ocean boundary layer is also very important in order to correctly represent the air-sea exchanges. Moreover, coupled physicalbiological models require a good representation of the thermocline position, in order to correctly represent the population dynamics at the surface layers. We present a technique to calculate the parameters of the thermocline: depth, width and temperature. These are calculated by a least-squares fitting of individual temperature profiles (from model and observations) to a sigmoid function. The residual is also obtained, giving an estimate of the goodness of the fit. The parameters calculated allow for a comparison of the model thermocline to observations. Our approach consists in comparing the model thermocline depth, width and temperature to observations. By examining separately the accuracy of the model thermocline depth and temperature, we gain insight in the processes that need correction in the model. For example, if the model thermocline is too deep compared to observations, or the width of the thermocline is incorrect, mixing parameters and surface momentum fluxes should be revised. However, if the depth is well represented but the temperature is incorrect, the surface heat fluxes may be the source of the error. By simply comparing model and observed temperature profiles we are not able to differentiate between error sources. The technique presented here stands therefore as a useful method for model evaluation. [less ▲]

Detailed reference viewed: 46 (3 ULg)
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See detail3-D gas exchange pathways in pome fruit characterised by synchrotron X-ray computed tomography
Verboven, Pieter; Kerckhofs, Greet ULg; Mebatsion, Hibru K. et al

Conference (2008)

Detailed reference viewed: 6 (1 ULg)
See detailAperture imaging beyond the classical resolution limit by using incoherent photons
Thiel, C.; Bastin, Thierry ULg; von Zanthier et al

Conference (2008)

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See detailMarine and fresh water palynomorphs from the Jauf Formation, Northwest Saudi Arabia
Miller, A.; Breuer, P.; Al-Ghazi, A. et al

Conference (2008)

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See detailA FIRST STEP TOWARD A CLOSE PROXIMITY NOISE MAP
Bueno, M.; Vinuela, U.; Teran, F. et al

Conference (2008)

Detailed reference viewed: 6 (0 ULg)
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See detailAssessment of stress level in horses (Equus caballus): behavioural and physiological measurements in hospital.
Peeters, Marie ULg; Péters, F.; Sulon, J. et al

Conference (2008)

Detailed reference viewed: 41 (7 ULg)
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See detailEnglish and Spanish Size Noun-constructions, a locus of ongoing grammaticalization
Brems, Lieselotte ULg; Verveckken, Katrien

Conference (2008)

Detailed reference viewed: 6 (1 ULg)
See detailCoupling of N Qubits to Any Dicke State via Projective Measurements
Thiel, C.; Maser, A.; Bastin, Thierry ULg et al

Conference (2008)

Detailed reference viewed: 7 (0 ULg)
See detailLa démarche RAI et le domicile
Gosset, Christiane ULg

Conference (2008)

Detailed reference viewed: 6 (0 ULg)
See detailQuantum imaging with uncorrelated single photon sources
Bastin, Thierry ULg; Thiel, C.; Solano, E. et al

Conference (2008)

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See detailHistoires parallèles de la sculpture moderne
Bawin, Julie ULg

Conference (2008)

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See detailHealthy and safe food for everybody
Jijakli, Haissam ULg

Conference (2008)

Detailed reference viewed: 3 (1 ULg)
See detail(Inter)subjectification in the Middle English Passive construction
Petré, Peter ULg

Conference (2008)

Detailed reference viewed: 6 (0 ULg)
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See detailArchaeometry at the Centre Européen d’Archéométrie-Université de Liège
Calvo Del Castillo, Helena ULg; Mathis, François ULg; Garcia Moreno, Renata et al

Conference (2008)

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See detailRecent palynological data in the Hautes-Fagnes, Belgium
Streel, Maurice ULg; Damblon, Freddy ULg

Conference (2008)

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See detailArchaeometry at the Centre Européen d'Archéométrie
Calvo Del Castillo, Helena ULg

Conference (2008)

Detailed reference viewed: 5 (0 ULg)