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See detailMagnetization of 2-G Coils and Artificial Bulks
Coombs, Tim; Fagnard, Jean-François ULg; Matsuda, Koichi

in IEEE Transactions on Applied Superconductivity (2014), 24(5), 8201005

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See detailIsocinétisme et muscles rotateurs d'épaule
Forthomme, Bénédicte ULg; Crielaard, Jean-Michel ULg; Kaux, Jean-François ULg et al

in Innovations technologiques et préhension (2014, October)

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See detailLa relation extraction-structure-propriétés des polysaccharides : cas des galactomannanes et des alginates
Gillet, Sébastien ULg; Richel, Aurore ULg

Learning material (2014)

Polysaccharides are usually composed of various monosaccharides linked with different glucosidic bonds. Some polysaccharides have hyperbranched structures. Moreover, polysaccharides often have high ... [more ▼]

Polysaccharides are usually composed of various monosaccharides linked with different glucosidic bonds. Some polysaccharides have hyperbranched structures. Moreover, polysaccharides often have high molecular weights, and tend to form aggregates in solution that can mask the behavior of individual macromolecules. In consequence, to characterize the chemical structures, chain conformations and physical properties of polysaccharides is not an easy task. [less ▲]

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See detailEtiology in Parthenius of Nicaea
Vandersmissen, Marc ULg

in Euphrosyne (2014), 42

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See detailDissociation Pathways of Benzylpyridinium “Thermometer” Ions Depend on the Activation Regime: An IRMPD Spectroscopy Study
Morsa, Denis ULg; Gabelica, Valérie ULg; Rosu, Frédéric et al

in Journal of Physical Chemistry Letters (2014), 5

The dissociation of benzylpyridinium “thermometer” ions is widely used to calibrate the internal energy of ions produced in mass spectrometry. The fragmentation mechanism is usually believed to yield a ... [more ▼]

The dissociation of benzylpyridinium “thermometer” ions is widely used to calibrate the internal energy of ions produced in mass spectrometry. The fragmentation mechanism is usually believed to yield a benzylium cation, although recent studies suggest the possibility of a rearrangement leading to the tropylium isomer, which would compromise the accuracy of energy calibrations. In this study, we used IRMPD spectroscopy to probe the dissociation pathways of the p-(tert-butyl)- benzylpyridinium ion. Our results show that the formation of both benzylium and tropylium products is feasible depending on the activation regime and on the reaction time scale. Varying the trapping delays in the hexapole gives insight into a rearrangement mechanism occurring through consecutive reactions with an isomerization from benzylium to tropylium. Our work provides experimental validations for the established calibration procedure and highlights the adequacy of IRMPD spectroscopy to qualitatively resolve gas-phase rearrangement kinetics. [less ▲]

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See detailMathematical Modeling of HIV Dynamics After Antiretroviral Therapy Initiation: A Review
Rivadeneira, Pablo; Moog, Claude; Stan, Guy-Bart et al

in BioResearch Open Acces (2014), 3(5), 233-241

This review shows the potential ground-breaking impact that mathematical tools may have in the analysis and the understanding of the HIV dynamics. In the first part, early diagnosis of immunological ... [more ▼]

This review shows the potential ground-breaking impact that mathematical tools may have in the analysis and the understanding of the HIV dynamics. In the first part, early diagnosis of immunological failure is inferred from the estimation of certain parameters of a mathematical model of the HIV infection dynamics. This method is supported by clinical research results from an original clinical trial: data just after 1 month following therapy initiation are used to carry out the model identification. The diagnosis is shown to be consistent with results from monitoring of the patients after 6 months. In the second part of this review, prospective research results are given for the design of individual anti-HIV treatments optimizing the recovery of the immune system and minimizing side effects. In this respect, two methods are discussed. The first one combines HIV population dynamics with pharmacokinetics and pharmacodynamics models to generate drug treatments using impulsive control systems. The second one is based on optimal control theory and uses a recently published differential equation to model the side effects produced by highly active antiretroviral therapy therapies. The main advantage of these revisited methods is that the drug treatment is computed directly in amounts of drugs, which is easier to interpret by physicians and patients. [less ▲]

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See detailWP2: Drivers of change at sub-global and local scales
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Boulaud, Anne-Laure et al

Conference (2014, October)

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See detailImproved spectral fitting of nitrogen dioxide from OMI in the 405-465 nm window
van Geffen, J H G M; Boersma, K F; Van Roozendael, M et al

in Atmospheric Measurement Techniques. Papers in Open Discussion (2014), 7

An improved nitrogen dioxide (NO2) slant column density retrieval for the Ozone Monitoring Instrument (OMI) in the 405–465 nm spectral region is presented. Since the launch of OMI on board NASA's EOS-Aura ... [more ▼]

An improved nitrogen dioxide (NO2) slant column density retrieval for the Ozone Monitoring Instrument (OMI) in the 405–465 nm spectral region is presented. Since the launch of OMI on board NASA's EOS-Aura satellite in 2004, DOAS retrievals of NO2 slant column densities have been the starting point for the KNMI DOMINO (v2.0) and NASA SP (v2.1) retrievals. However, recent intercomparisons between NO2 retrievals from OMI and other UV/Vis and limb spectrometers, as well as ground-based measurements, clearly suggested that OMI stratospheric NO2 is biased high. This study revises the OMI NO2 retrieval in detail. The representation of the OMI slit function to convolve high-resolution reference spectra onto the relevant spectral grid is improved. The window used for the wavelength calibration is optimised, leading to much-reduced fitting errors. Ozone and water vapour spectra used in the fit are updated, reflecting the recently improved knowledge on their absorption cross section as documented in the literature. The improved spectral fit also accounts for absorption by the O2–O2 collision complex and by liquid water over clear-water areas. The main changes in the improved spectral fitting result from the updates related to the wavelength calibration: the RMS error of the fit is reduced by 23% and the NO2 slant column by 0.85 × 1015 molec cm-2, independent of latitude, solar zenith angle and NO2 value. Including O2–O2 and liquid water absorption and updating the O3 and water vapour cross-section spectra further reduces NO2 slant columns on average by 0.35 × 1015 molec cm-2, accompanied with a further 9% reduction in the RMS error of the fit. The improved OMI NO2 slant columns are consistent with independent NO2 retrievals to within a range that can be explained by photo-chemically driven diurnal increases in stratospheric NO2 and by small differences in fitting window and fitting approach. The revisions indicate that current OMI NO2 slant columns suffered mostly from an additive, positive offset that is removed by the improved wavelength calibration and representation of the OMI slit function. It is therefore anticipated that the improved NO2 slant columns are most important to retrievals of spatially homogeneous stratospheric NO2 rather than to heterogeneous tropospheric NO2. [less ▲]

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See detailInvestigation on Convective Drying of Mixtures of Sewage Sludge and Sawdust in a Fixed Bed
Li, Jie ULg; Fraikin, Laurent ULg; Salmon, Thierry ULg et al

in Drying Technology (2014)

This work is a part of a project aiming at developing a renewable fuel for gasification purposes, through convective drying of sludge/wood mixtures. The first step consists of characterizing the behavior ... [more ▼]

This work is a part of a project aiming at developing a renewable fuel for gasification purposes, through convective drying of sludge/wood mixtures. The first step consists of characterizing the behavior of sawdust/sludge mixtures during the application of convective drying. The influence of the mixing step (no mixing against 30 s at 40 rpm), as well as the sawdust/sludge ratio (1/9, 2/8, 3/7 and 4/6 on a dry basis) and the effect of the drying temperature (50 °C, 80 °C and 110 °C) have been investigated. In this study, X-ray tomography, a non-invasive imaging technique, is used to assess changes in the volume, void and exchange surface at the beginning and the end of the drying process. Results first confirm the importance of the mixing step on the drying behavior: the drying rate of the mixed sludge is lower than that of the original sludge. Nevertheless the addition of sawdust is shown to have a positive impact on the drying process from a mass ratio of 2/8, with drying rates higher than that of the original sludge. With increasing amount of sawdust, the initial and final bed volumes, initial and final total exchange surfaces, and initial void fraction increase linearly, but the bed volume shrinkage and final void fraction decrease linearly. [less ▲]

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See detailThe effect of deforestation rate on land tenure in Central AFrica
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Feintrenie, Laurène

Poster (2014, October)

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See detailImpact of vocal load on breathiness: Perceptual evaluation
Remacle, Angélique ULg; Schoentgen, Jean; FINCK, Camille ULg et al

in Logopedics, Phoniatrics, Vocology (2014), 39(3), 139-146

Objectives: To evaluate the impact on voice of 2 hours of continuous oral reading. Methods: Fifty normophonic women underwent two sessions of voice loading in which the required intensity level varied: 60 ... [more ▼]

Objectives: To evaluate the impact on voice of 2 hours of continuous oral reading. Methods: Fifty normophonic women underwent two sessions of voice loading in which the required intensity level varied: 60-65 dB(A) for the first session, and 70-75 dB(A) for the second session. Ten expert judges evaluated the breathiness of one sentence recorded before and after each loading session. Pairs of stimuli were presented randomly to the judges, who were asked to designate the breathiest sample. Results: A significant decrease in breathiness was observed following both sessions, suggesting an improvement of voice subsequent to loading. When comparing the two intensity levels, no difference was found for breathiness after vocal loading. [less ▲]

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See detailWilderness et Western. L'Ouest fictionnel chez Gustave Aimard et Emilio Salgari
Di Gregorio, Luca ULg

Book published by Presses Universitaires de Liège (2014)

Cet ouvrage pose deux questions relatives aux « matières de l’Ouest » : (1) S’est-il façonné en Europe une imagination propre des Grands Espaces et, si oui, quelles en furent les principales options ... [more ▼]

Cet ouvrage pose deux questions relatives aux « matières de l’Ouest » : (1) S’est-il façonné en Europe une imagination propre des Grands Espaces et, si oui, quelles en furent les principales options éthiques, esthétiques et narratives ? (2) Qu’est-ce qui singularise les thèmes, les intrigues et les personnages privilégiés de cette écriture européenne par rapport à l’imagerie — surexploitée depuis Hollywood — impliquant le cow-boy, le shérif, ou encore les squatters et settlers de la Conquête de l’Ouest ? Le couple wilderness/western — mobilisé ici à des fins dialectiques et non dualistes — débroussaille quelques-unes des pistes herméneutiques d’une production romanesque méconnue. En s’appuyant sur un sous-genre pour ainsi dire oublié du récit aventureux du xixe siècle, l’auteur explore les visages d’un Ouest fictionnel qui, grâce au recul européen, a su se parer d’intéressants lieux d’indépendance et de dynamiques insoupçonnées. Dans l’intervalle entre le wilderness, univers agrégeant l’hygiénisme libertin des Lumières et le spiritualisme romantique, et le western, imaginaire de l’allant national, modelé par et pour l’autonomisation culturelle des USA, mais aussi sous l’effet d’un tiraillement souterrain entre l’exemple colonial français et la Conquête pionnière de l’Ouest, ce sont des oppositions, des débats et des mélanges du plus haut intérêt qui se firent jour dans la France et l’Italie de 1858-1910. Les romans de Gustave Aimard et Emilio Salgari interviennent dans ce contexte, quoiqu’à des titres très différents (l’un grand consolidateur générique, l’autre compositeur original et articulateur d’imaginaires), comme les jalons d’une histoire des formes appropriatives de l’espace-réceptacle ouestien. À bien des égards, un tel parcours ajoute ses sinuosités et ses enjeux spécifiques à l’historiographie strictement américaine : il y apparaît en effet que l’Europe, relativement à l’Ouest, parvint à se faire successivement laboratoire et carrefour imaginaires. [less ▲]

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See detail« Quand l’Etat échoue à ramener l’ordre. Conflits d’héritage et conscience du droit à Cotonou »
Andreetta, Sophie ULg

Conference (2014, October)

Ces dernières années, le nombre de conflits d’héritage gérés par le tribunal de première instance de Cotonou a considérablement augmenté. Si nombreux sont ceux qui « saisissent l’Etat » pour « rétablir ... [more ▼]

Ces dernières années, le nombre de conflits d’héritage gérés par le tribunal de première instance de Cotonou a considérablement augmenté. Si nombreux sont ceux qui « saisissent l’Etat » pour « rétablir l’ordre » dans leur famille, les institutions judiciaires parviennent-elles à remplir leur mission ? Je m’intéresserai tout particulièrement à l’exécution des décisions de justice. Que se passe-t-il une fois la décision rendue ? Comment le processus d’exécution est-il approprié par les professionnels du droit et par les familles ? [less ▲]

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See detailDesigning large-scale CO2 capture units with assessment of solvent degradation
Léonard, Grégoire ULg; Crosset, Cyril; Dumont, Marie-Noëlle ULg et al

Poster (2014, October)

Solvent degradation is a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. In the present work, we refine a ... [more ▼]

Solvent degradation is a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. In the present work, we refine a previous kinetic model for describing solvent oxidative and thermal degradation based on experimental results. The CO2 capture process is then modeled in Aspen Plus with assessment of solvent degradation. As a result, this work provides a useful tool for the identification of optimal operating conditions that minimize both the energy and environmental impacts of the process. [less ▲]

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