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See detailAnalyse quantitative par spectroscopie proche infrarouge: Application au test d'unifomité de teneur des comprimés
Ginot, Y. M.; Bernard-Moulin, P.; Cinier, R. et al

Conference (2008)

La spectroscopie Proche infrarouge présente un large potentiel d'applications dans l'industrie pharmaceutique par sa capacité à transmettre des informations reliées à la fois à la structure chimique des ... [more ▼]

La spectroscopie Proche infrarouge présente un large potentiel d'applications dans l'industrie pharmaceutique par sa capacité à transmettre des informations reliées à la fois à la structure chimique des échantillons et à leur état physique. Elle peut être mise à profit pour des analyses qualitatives, telles l'identification des matières premières, et également pour des analyses quantitatives telles le dosage d'un principe actif dans un comprimé. Avec pour avantage une rapidité inégalée pour délivrer un résultat comparée aux techniques classiques en vigueur. Attrayante par ses performances, cette spectroscopie nécessite cependant une prise en main qui doit respecter une démarche minutieuse et souvent déroutante par son aspect heuristique (allers-retours) et à la mise en oeuvre d'outils d'analyse statistique multivariée. Si de nombreuses publications témoignent de la puissance de cet outil, il est apparu opportun de rassembler en un même texte la démarche de développement à suivre et les repères à connaître pour permettre son utilisation en analyse quantitative dans un contexte de libération pharmaceutique. Le travail de cette commission a été de rassembler les éléments issus de la pratique industrielle en se concentrant sur l'un des essais les plus intéressants: celui de l'uniformité de teneur des comprimés. Ce test est en effet l'une des applications où la rapidité de mise en oeuvre est le plus appréciable, tout en étant celui qui peut poser le plus de questions quant à la validité des résultats et la prise de décision pharmaceutique. [less ▲]

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See detailWATER QUALITY AND POLLUTION CONTROL IN PHNOM PENH, CAMBODIA
men, nareth; Ly, Sarann ULg; ann, vannak et al

Conference (2008)

The urban infrastructure, particularly water supply and drainage systems, have deteriorated severely in the past two decades in Phnom Penh, the capital city and the economic center of Cambodia. Water ... [more ▼]

The urban infrastructure, particularly water supply and drainage systems, have deteriorated severely in the past two decades in Phnom Penh, the capital city and the economic center of Cambodia. Water pollution caused by untreated wastewater is one of the serious problems that confront most developing countries (Kwai et al.1991). In Phnom Penh City, all kinds of wastewater are discharged to rivers, lakes and wetlands throughout the city without proper treatment causing serious surface water pollution. Water testing is an essential factor to control water pollution. However, water quality data and water quality testing systems are still poorly developed in Cambodia due to lack of facilities and technical expertise. Therefore, there is no information available on sewage water quality in Phnom Penh City. That’s why the work is aimed at collating basic information about the situation of water supply, waste water system and solid waste. The present information will provide the basis for targeting further field research. This is included the overview of sources and activities that may lead to pollution, with an appreciation of type of water pollutants involved, their magnitude and movement. Types of waste and effluent disposal including sanitation, liquid and solid waste management systems are described. After reviewing all the available, we found that the distribution of water has been well organized by the Phnom Penh Water Supply Authority while the managements of the wastewater, storm water and solid waste are poor due to the rapid urbanisation and industrialisation. [less ▲]

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See detailPoultry products market : Food safety and international trade
Duquesne, Brigitte ULg

Conference (2008)

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See detailEnglish and Spanish Size Noun-constructions, a locus of ongoing grammaticalization
Brems, Lieselotte ULg; Verveckken, Katrien

Conference (2008)

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See detailFruit microstructure evaluation using synchrotron X-ray computed tomography
Verboven, Pieter; Kerckhofs, Greet ULg; Mebatsion, Hibru K. et al

Conference (2008)

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See detailL’usage de l’archive anonyme dans la photographie contemporaine
Bawin, Julie ULg

Conference (2008)

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See detailCrystal chemistry of natural and synthetic fillowite-type phosphates
Hatert, Frédéric ULg; Keller, Paul; Grew, Ed et al

Conference (2008)

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See detailLe champ d'application de la loi Breyne
Kohl, Benoît ULg

Conference (2008)

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See detailConformal doping of FINFET's : a fabrication and metrology challenge
Vandervorst, Wilfried; Eyben, Pierre; Mody, Jay et al

Conference (2008)

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See detailOUFTI-1: The CubeSat developed at the University of Liège, Belgium
Galli, Stefania; Pisane, Jonathan ULg; Ledent, Philippe et al

Conference (2008)

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See detailDisturbed sense of agency in checking symptoms
Belayachi, Sanaa ULg

Conference (2008)

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See detailLa consécration de la Charte des droits fondamentaux
Defossez, Alexandre ULg

Conference (2008)

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See detailStatus and causes of decline in heterochronic newts from Europe
Denoël, Mathieu ULg; Dzukic, Georg; Ficetola, Gentile et al

Conference (2008)

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See detailIntegrating soil and plant knowledge at different scales to better understand the dynamics of water in SPAC.
Lobet, Guillaume ULg; Chaumont, F.; Javaux, M. et al

Conference (2008)

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See detailPraktijkgerelateerd contrastief onderzoek naar vreemdetaalverwerving
Hiligsmann, Philippe; Baelen, Mélanie; Leloup, Anne-Lore et al

Conference (2008)

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See detailHolocene Records of Aerosols in Continental Environments (HoRACE)
Le Roux; De Vleeschouwer, F.; Cherbukin et al

Conference (2008)

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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)

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See detail3D Probabilistic Representations for Vision and Action
Piater, Justus ULg; Detry, Renaud ULg

Conference (2008)

Detailed reference viewed: 21 (3 ULg)
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See detailNon-native prosody: production and perception of accent
Rasier, Laurent ULg; Caspers, Johanneke; Van Heuven, Vincent

Conference (2008)

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See detailLe genre et la diversité : enjeux et opportunités
Cornet, Annie ULg

Conference (2008)

Detailed reference viewed: 23 (5 ULg)
See detailLa démarche RAI et le domicile
Gosset, Christiane ULg

Conference (2008)

Detailed reference viewed: 6 (0 ULg)
See detailL'économie céréalière : aspects prospectifs
Burny, Philippe ULg

Conference (2008)

Detailed reference viewed: 3 (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 ▲]

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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)

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See detailOn the complementarity of contrastive linguistics and interlanguage studies
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2008)

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See detailVariable selection for dynamic treatment regimes: a reinforcement learning approach
Fonteneau, Raphaël ULg; Wehenkel, Louis ULg; Ernst, Damien ULg

Conference (2008)

Dynamic treatment regimes (DTRs) can be inferred from data collected through some randomized clinical trials by using reinforcement learning algorithms. During these clinical trials, a large set of ... [more ▼]

Dynamic treatment regimes (DTRs) can be inferred from data collected through some randomized clinical trials by using reinforcement learning algorithms. During these clinical trials, a large set of clinical indicators are usually monitored. However, it is often more convenient for clinicians to have DTRs which are only defined on a small set of indicators rather than on the original full set. To address this problem, we analyse the approximation architecture of the state-action value functions computed by the fitted Q iteration algorithm - a RL algorithm - using tree-based regressors in order to identify a small subset of relevant ones. The RL algorithm is then rerun by considering only as state variables these most relevant indicators to have DTRs defined on a small set of indicators. The approach is validated on benchmark problems inspired from the classical ‘car on the hill’ problem and the results obtained are positive. [less ▲]

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See detailA distinctive marginal marine palynological assemblage from the Pridoli of Northwestern Saudi Arabia
Al-Hajri, S.; Verniers, J.; Paris, F. et al

Conference (2008)

This paper describes a rare occurrence of a rich and diverse palynological assemblage from a controversial stratigraphic unit in well EW8 in northwestern Saudi Arabia. The composition of this assemblage ... [more ▼]

This paper describes a rare occurrence of a rich and diverse palynological assemblage from a controversial stratigraphic unit in well EW8 in northwestern Saudi Arabia. The composition of this assemblage strongly suggests a Pridoli age and therefore it is referred here to the Tawil Formation. The assemblage encountered contains very characteristic chitinozoans, acritarchs, tasmanities, scolecodontsm, eurypterid cuticle and common land-derived miospores and hilate cryptospores. Chitinozoans such as Margachitina elegans, Ancyrochitina fragilis brevis, Ancyrochitina fragilis, Sphaerochitina sphaerocephala, Urnochitina urna, Pseudochlathrochitina carmenchui and Lagenochitina brevicollis confer the Pridoli age assignment. This assemblage of chitinozoans correlates very well with Assemblage D from the Alternances Gréso-Argileuses Formation of the A1-61 well in northwestern Libya. Among the acritarchs present are: Cymbosphaeridium pilar, Leoniella carminae,Diexallophasis spp., Tunisphaeridium cf caudatum, Leiofusa estrecha and Eupoikilofusa striatifera. <br /> <br />Furthermore, the join occurrence of U. urna, P. carmenchui and M. elegans is clearly indicative of the middle part of the Pridoli as in the Libyan well A1-61, and in many wells in Algeria. This corresponds to what is considered to be a transgressive mid Pridoli event in the Algerian Sahara, with non marine intervals bracketing this brief marine sea level rise. This event is likely to have extended into all of north Gondwana including Arabia. [less ▲]

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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 ▲]

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See detailEvolution de l’économie rurale en Hainaut
Duquesne, Brigitte ULg

Conference (2008)

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See detailForesterie communautaire : les silences de la loi gabonaise
Vermeulen, Cédric ULg

Conference (2008)

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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)

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See detailPhotodegradation of bacteria on TiO2 thin films produced by sol-gel method
Tasseroul, Ludivine ULg; Braconnier, Benoît; Nonet, Stéphane et al

Conference (2008)

Detailed reference viewed: 12 (3 ULg)
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See detailThermo-hydro-mechanical simulation of Atlas in situ large-scale test in Boom clay
François, Bertrand ULg; Laloui, Lyesse

Conference (2008)

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See detailAspects fiscaux du droit de la famille
Bourgeois, Marc ULg

Conference (2008)

Detailed reference viewed: 4 (1 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: 147 (23 ULg)
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See detailLa mondialisation multiple des musiques populaires
Pirenne, Christophe ULg

Conference (2008)

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See detailDevonian mio-and megaspores in Western Gondwana
Steemans, Philippe ULg; Breuer, Pierre; Miller, M.

Conference (2008)

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See detailVision as Inference in a Hierarchical Markov Network
Piater, Justus ULg; Scalzo, Fabien; Detry, Renaud ULg

Conference (2008)

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See detailMutualisme pucerons-fourmis : étude des bénéfices retirés par les colonies d’Aphis fabae en milieu extérieur
Verheggen, François ULg; Detrain, Claire; Diez, Lise et al

Conference (2008)

Aphid-Ant relationships are common examples of mutualism. Aphids are indeed submitted to predation and therefore require protection, while ants are continuously looking for new sugar sources. The present ... [more ▼]

Aphid-Ant relationships are common examples of mutualism. Aphids are indeed submitted to predation and therefore require protection, while ants are continuously looking for new sugar sources. The present work aimed to study the benefits that a mutualistic relationship with Lasius niger (Hymenoptera : Formicidae) could bring to the black bean aphid Aphis fabae (Homoptera, Aphididae). Several parameters were observed in the field, on broad bean plants infested with an initial amount of 100 A. fabae and in presence or not of a L. niger colony. More aphids were observed on plants being visited by ants as well as a higher proportion of winged individuals. One explanation is that fewer predators were observed on plants being visited by ants, demonstrating their protective role. However, the number of parasitized aphids was not reduced in presence of L. niger. On the other hand, fewer different aphid species were present on plants foraged by ants, what suggests that they could exert a predation on unattended aphids. Our observations do not allow to conclude on any impact of L. niger on the fitness of the aphid host plant, although fewer exuvia and honeydew spots were observed when they were present. All these results confirm that L. niger increase the fitness of A. fabae colonies mainly by decreasing the number of predators and by reducing competition from aphid species unattended by ants. [less ▲]

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See detailProduire une exposition sous forte contrainte
Jaminon, Martine ULg

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)

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See detailLes marqueurs de l'alcoolisme
Charlier, Corinne ULg

Conference (2008)

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See detailImagerie fonctionnelle et coma: implications pronostiques
Vanhaudenhuyse, Audrey ULg

Conference (2008)

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

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 ▲]

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See detailA Nested Model of the West Florida Shelf: Assimilation of High-Frequency Radar Currents and study of Loop Current generated flow
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Zheng, L. et al

Conference (2008)

High-Frequency Radar Currents are assimilated in a West Florida Shelf (WFS) model based on the Regional Ocean Model System (ROMS) which is nested in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) to ... [more ▼]

High-Frequency Radar Currents are assimilated in a West Florida Shelf (WFS) model based on the Regional Ocean Model System (ROMS) which is nested in the Atlantic Hybrid Coordinate Ocean Model (HYCOM) to include both local and deep-ocean forcing, particularly the Gulf of Mexico Loop Current (LC). An ensemble simulation of the WFS ROMS model is carried out under different wind forcings in order to estimate the error covariance of the model state vector and the covariance between ocean currents and winds. Radial currents measured by HF-Radar antennas near St. Petersburg and Venice, FL, are assimilated using this ensemble-based error covariance. Different assimilation techniques using a time-average ensemble, a filter to reduce surface-gravity waves and an extended state vector including wind stress were tested. Results of WFS ROMS model assimilating surface currents show an improvement of the model currents not only at the surface but also at depth. The LC is a highly unstable current which generates large anticyclones traveling to the West but also a series of smaller anticyclones and filaments moving to the East and affecting the West Florida shelf. An additional tracer is included in the model simulation to track the presence of LC water. With this tracer, the total amount of LC water reaching the shelf and its mechanism is studied. [less ▲]

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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 detailProsthesis-Patient Mismatch is an independent Predictor of Short-term Mortality Following Mitral Valve Replacement.
Magne, Julien ULg; Mathieu, P; Dumesnil, JG et al

Conference (2008)

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See detailProbable microfossils in 3.2 Ga-old shallow-water siliciclastic deposits
Javaux, Emmanuelle ULg; Marshall, Craig; Bekker, Andrey

Conference (2008)

Detailed reference viewed: 4 (0 ULg)