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See detailMR2048151, Sergeev, Y. A. and Swailes, D. C. and Petrie, C. J. S., Stability of uniform fluidization revisited; Physica A
Rochus, Pierre ULg

in Mathematical Reviews [=MR] (2004), 335(1-2), 9--34

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See detailDevelopment of RT-PCR assays using fluorogenic 3 minor groove binder DNA probes for detection of fruit tree viruses.
Marbot, Sophie; Kummert, Jean; Vendrame, Marina et al

in Acta Horticulturae (2004), (657), 547-551

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See detailEffect Of Pig Bodyweight On Ileal Amino Acid Endogenous Losses After Ingestion Of A Protein-Free Diet Enriched In Pea Inner Fibre Isolates
Leterme, Pascal; Thewis, André ULg

in Reproduction Nutrition Development (2004), 44(5), 407-417

The present study was conducted to evaluate whether bodyweight and the micronisation of dietary fibre affect the endogenous nitrogen and amino acid losses (ENL and EAAL) in pigs. The effect of the ... [more ▼]

The present study was conducted to evaluate whether bodyweight and the micronisation of dietary fibre affect the endogenous nitrogen and amino acid losses (ENL and EAAL) in pigs. The effect of the micronising process was tested by providing pigs with 90 g DM·kg–1 BW0.75 of a N-free diet supplemented with isolated pea inner fibres, presented in native or micronised form and with a water-holding capacity of 12 and 4 g water·g–1 DM, respectively. ENL and EAAL were measured on pigs weighing 24, 62 and 105 kg. In all cases, daily ENL increased linearly (P < 0.05) with BW, for the majority of the AA and total N. As BW increased, daily ENL, total EAAL and the majority of EAAL increased linearly independently of micronisation (P < 0.05). When expressed per kg DMI, total EAAL and the majority of each EAA decreased curvilinearly and reached nadir at around 100 kg BW. For ENL expressed per kg DMI, micronisation resulted in a curvilinear decrease with increasing BW, as compared to a linear decrease for pigs fed the native pea fibre diet (non-micronised). Micronisation of pea inner fibres did not decrease ENL or EAAL daily, except for proline. When the losses were expressed as g·k–1g DMI, micronisation did not decrease ENL but decreased (P < 0.05) endogenous losses for a majority of AA as well as for total AA. The results suggest that small pigs excrete more endogenous N per kg DMI than large pigs and that pea fibre micronisation reduces EAAL but not ENL when expressed per kg DMI. [less ▲]

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See detailImprovement Of Spray Deposit Homogeneity Using A Pwm Spray Controller To Compensate Horizontal Boom Speed Variations
Lebeau, Frédéric ULg; El Bahir, L.; Destain, Marie-France ULg et al

in Computers and Electronics In Agriculture (2004), 43(2),

Longitudinal spray distribution is mainly affected by the horizontal speed variations of the nozzles. Manufacturers classically try to reduce unwanted nozzles movements using horizontal boom suspension ... [more ▼]

Longitudinal spray distribution is mainly affected by the horizontal speed variations of the nozzles. Manufacturers classically try to reduce unwanted nozzles movements using horizontal boom suspension but these methods have performance and price limitations. This paper describes a spray controller aiming to compensate the effect of the horizontal boom movements on the spray deposits homogeneity. The controller is based on three main components: a control law describing the relationship between nozzle speed, nozzle flow and spray deposit; a real time measurement of the boom horizontal speed variations using micro-machined capacitive accelerometers, and pulse width modulation (PWM) nozzle flow actuators. To assess the feasibility of such a controller, a single nozzle prototype was developed and tested in the laboratory, using a nigrosine solution. Spray coverage was measured using image analysis for field representative nozzle speed variations. The spray coverage uniformity using the controller showed about 51% compensation of the variations observed without it. [less ▲]

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See detailModelling The Dynamic Distribution Of Spray Deposits
Lebeau, Frédéric ULg

in Biosystems Engineering (2004), 89(3),

A mathematical model to estimate the spray distribution of phytopharmaceutical deposits under a spray boom is proposed. It focuses on the need to take account of the dynamic effects of the forward ... [more ▼]

A mathematical model to estimate the spray distribution of phytopharmaceutical deposits under a spray boom is proposed. It focuses on the need to take account of the dynamic effects of the forward movement of the boom. These are related both to the horizontal and vertical boom movement and to the influence of aerodynamic factors on the nozzle spray distribution. The distribution of the spray deposits is computed by multiplying the nozzle spray pattern by the time needed to move from one position to the next. Mathematically, this is expressed by a convolution of the trajectory function with the nozzle spray pattern function. The model is validated through a dynamic test bench to reproduce the boom movements observed in the field. The chosen method to measure the distribution of the spray deposits is a chemical dosage of the sprayed potassium chloride (KCl) solution collected in Petri dishes. A pulse-width modulation (PWM) nozzle body fitted on the test bench is used to generate a dynamic distribution of spray deposits from which the dynamic two-dimensional nozzle spray pattern is reconstructed. This dynamic nozzle spray pattern introduced in the model allows a far better estimation of the spray deposit distribution to be made than the one obtained using the static nozzle spray pattern which was computed using filtered back-projection. [less ▲]

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See detailLe bilan azoté dans les exploitations porcines wallonnes : entre contraintes environnementales et qualité différenciée.
Degre, Aurore ULg; Verheve, Didier; Debouche, Charles ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2004), 8(2), 119-124

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See detailLe verrat, la truie: Aspects techniques de la reproduction
Feller, Didier; Thilmant, Pierre; Wavreille, José et al

Book published by FPW - Edition 2004 (2004)

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See detailDes socles de compétences à la mise en place d'une démarche expérimentale à l'école primaire : intervention en formation initiale des enseignants
Hindryckx, Marie-Noëlle ULg; Stegen, Pierre; Graftiau, Marie-Christine et al

in Herphelin, Martine (Ed.) Actes du troisième congrès des chercheurs en éducation : (re)trouver le plaisir d'enseigner et d 'apprendre; construire savoirs et compétences (2004)

Dans le cadre de ce projet de recherche-action, une collaboration étroite entre deux services universitaires de Liège (Service de Didactique générale , faculté de Psychopédagogie et service de Chimie ... [more ▼]

Dans le cadre de ce projet de recherche-action, une collaboration étroite entre deux services universitaires de Liège (Service de Didactique générale , faculté de Psychopédagogie et service de Chimie organique - faculté des Sciences) et la Haute École Charlemagne (Liège et Huy) s’est mise en place pendant trois ans. La question centrale qui a guidé le travail durant ces trois années est : « Comment incorporer, dans le curriculum de formation des futurs instituteurs, des mises en situation favorisant le développement de leur capacité à construire des activités d’apprentissages faisant intervenir des démarches expérimentales telles que présentées dans le document « Socles de compétences » ? ». L’objet de la collaboration entre les différents partenaires concernés a été la construction d’un outil de formation prenant place dans les ateliers de formation professionnelle (AFP) des futurs enseignants. Cet outil de formation a pris la forme d’un module qui s’est articulé sur une démarche en trois temps : • Faire vivre aux futurs enseignants une démarche de recherche expérimentale concrète, au départ d’une énigme scientifique à leur niveau ; • Prendre du recul face au vécu pour faire identifier par les stagiaires les fondements didactiques de la démarche de formation et prolonger cette réflexion métacognitive par des moments de théorisation sur les contenus visés ; • Construire ensemble des séquences de leçons mettant en place une démarche expérimentale et les tester dans des classes du primaire Ce dispositif a été testé à cinq reprises, dans des situations différentes, à la Haute École Charlemagne dans les implantations de Liège et de Huy. Un document en cinq volumes constitue le rapport final qui clôture les trois années de recherche pour l’AGERS. Il est construit comme un outil destiné aux enseignants des Hautes Ecoles (psychopédagogues et/ou professeur de sciences) ainsi qu’aux maîtres de formation pratique. [less ▲]

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See detailBridges across Chasms: Towards a Transcultural Future in Caribbean Literature
Ledent, Bénédicte ULg

Book published by L3 (Liège Language and Literature) (2004)

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See detailGenetic structuralism, psychological sociology and pragmatic social actor theory, Proposals for a convergence of French sociologies
Frère, Bruno ULg

in Theory, Culture & Society (2004), 21(3), 85-99

This paper would like to show that Wittgenstein and Freud have exerted a considerable - though narrow - influence on Bourdieu's sociology. But they also pervade the theoretical development of two other ... [more ▼]

This paper would like to show that Wittgenstein and Freud have exerted a considerable - though narrow - influence on Bourdieu's sociology. But they also pervade the theoretical development of two other currents, which have emerged in French Sociology in the last few years, and were developed by L. Boltanski and L. Thevenot, on the one hand, and B. Lahire, on the other. Although they do not make it explicit, the advocates of these two currents have nevertheless been influenced by Wittgenstein and Freud. Thus Boltanski has drawn on Wittgenstein to develop a sociology which gives primacy to the social actor's interpretation of his or her situation through lay theorising. Lahire's work clearly pays a debt to Freud with his psychological sociology. It would therefore be interesting, in the first instance, to tease out how Wittgenstein and Freud, respectively, have influenced these two systems to demonstrate that they can indeed be used to generate new sociological currents, other than Bourdieu's own. This would then allow us to explore how they could be used to fill any gaps in Bourdieu's work, thus giving the latter renewed relevance and staunching its stagnating tendencies. But, ultimately, this analysis aims to show how Wittgenstein’s and Freud's theoretical influences can lead the way towards a theoretical synthesis between Bourdieu's critical sociology, Boltanski's social actor theory and Lahire's psychological sociology. Currently, these three currents operate independently of each other, without any kind of dialogue. And yet, far from being incompatible, these sociologies offer opportunities for exploring how they might complement each other and for mutual enrichment. [less ▲]

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See detailPhénoménologie et personnalisme. Remarques sur le formalisme en éthique de Max Scheler.
Frère, Bruno ULg

in Archives de Philosophie (2004), 67(3), 445-464

Scheler, remarque Gurvitch, "est arrivé à des résultats qui nous semblent présenter de véritables acquisitions, acquisitions très importantes pour la philosophie contemporaine. Ainsi en est-il de sa ... [more ▼]

Scheler, remarque Gurvitch, "est arrivé à des résultats qui nous semblent présenter de véritables acquisitions, acquisitions très importantes pour la philosophie contemporaine. Ainsi en est-il de sa critique du formalisme kantien et de son analyse phénoménologique de l'intentionnalité émotionnelle". Celles-ci, poursuit-il, sont toutes deux "d’une importance et d’une valeur primordiales". En effet , au coeur d’une époque où l’Allemagne philosophique est plus que jamais féconde, la pensée schelerienne apparaît à beaucoup comme l’une des premières à avoir véritablement "fait ombre à la gloire de Kant" tout en restant sur son terrain. Sans pour autant souscrire à la philosophie du soupçon, il s’écartera définitivement du schéma rationaliste en vigueur depuis l’avènement du cogito cartésien, dont l'auteur des trois critiques compte "parmi les héritiers" et qu’il n’hésite pas à tenir — bien qu'il en reconnaisse la puissance — pour un véritable "tissu d’erreurs du point de vue de son contenu philosophique". Nous voudrions montrer dans cet article que c'est, en Allemagne, une telle critique du cogito qui a permi à Scheler d'ouvrir les voies d'une sociologie phénoménologique, bien avant Schütz. Et même peut-être les voies de la sociologie tout court. [less ▲]

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See detailFully automated method for the liquid chromatographic-tandem mass spectrometric determination of cyproterone acetate in human plasma using restricted access material for on-line sample clean-up.
Christians, Benoit; Fillet, Marianne ULg; Chiap, Patrice ULg et al

in Journal of Chromatography. A (2004), 1056(1-2), 105-10

A new automated method for the quantitative analysis of cyproterone acetate (CPA) in human plasma has been developed using on-line solid phase extraction (SPE) prior to the LC-MS/MS determination. The ... [more ▼]

A new automated method for the quantitative analysis of cyproterone acetate (CPA) in human plasma has been developed using on-line solid phase extraction (SPE) prior to the LC-MS/MS determination. The method was based on the use of a pre-column packed with internal-surface reversed-phase material (LiChrospher RP-4 ADS, 25 mm x 2 mm) for sample clean-up coupled to LC separation on an octadecyl silica stationary phase by means of a column switching system. A 30 microl plasma sample volume was injected directly onto the pre-column using a mixture of water, acetonitrile and formic acid (90:10:0.1 (v/v/v)) adjusted to pH 4.0 with diluted ammonia as washing liquid. The analyte was then eluted in the back-flush mode with the LC mobile phase consisting of water, methanol and formic acid (10:90:0.1 (v/v/v)). The dispensing flow rates of the washing liquid and the LC mobile phase were 300 microl min(-1). Medroxyprogesterone acetate (MPA) was used as internal standard. The MS ionization of the analytes was achieved using electrospray (ESI) in the positive ion mode. The pseudomolecular ionic species of CPA and MPA (417.4 and 387.5) were selected to generate daughter ions at 357.4 and 327.5, respectively. Finally, the developed method was validated according to a new approach using accuracy profiles as a decision tool. Very good results with respect to accuracy, detectability, repeatability, intermediate precision and selectivity were obtained. The LOQ of cyproterone acetate was 300 pg ml(-1). [less ▲]

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See detailEffect of non-steroidal anti-inflammatory drugs on amyloid-beta formation and macrophage activation after platelet phagocytosis.
Jans, Dominique ULg; Martinet, Wim; Fillet, Marianne ULg et al

in Journal of Cardiovascular Pharmacology (2004), 43(3), 462-70

Recently, we showed that platelet phagocytosis occurs in human atherosclerotic plaques and leads to foam cell formation. Platelet phagocytosis, resulting in macrophage activation and iNOS induction, was ... [more ▼]

Recently, we showed that platelet phagocytosis occurs in human atherosclerotic plaques and leads to foam cell formation. Platelet phagocytosis, resulting in macrophage activation and iNOS induction, was associated with the formation of amyloid-beta peptide (Abeta) via proteolytic cleavage of platelet-derived amyloid precursor protein (APP), possibly by secretases. To test the involvement of gamma-secretase in this process, we used indomethacin, ibuprofen, and sulindac sulfide, non-steroidal anti-inflammatory drugs (NSAIDs) known to alter the gamma-secretase cleaving site of APP, on their ability to inhibit macrophage activation evoked by platelet phagocytosis. J774 macrophages were incubated with human platelets or lipopolysaccharide (LPS) with or without NSAIDs. Nitrite was quantified as a measure for inducible nitric oxide synthase (iNOS) activity. Indomethacin, ibuprofen, sulindac sulfide, and meloxicam concentration-dependently reduced nitrite production by macrophages incubated with platelets, but did not alter LPS-induced iNOS activity or platelet uptake. However, acetylsalicylic acid and naproxen, two NSAIDs without effect on the gamma-secretase cleaving site of APP, did not affect nitrite production in either platelet- or LPS-stimulated macrophages. Surface-enhanced laser desorption/ionization time-of-flight mass-spectrometry demonstrated time-dependent formation of Abeta-containing peptides after platelet phagocytosis, which could be inhibited by indomethacin. In conclusion, these results point to the involvement of gamma-secretase in macrophage activation following platelet phagocytosis. [less ▲]

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See detailFrasnian carbonate mounds of the Frasnes area, Belgium
Boulvain, Frédéric ULg

in IAS Newsletters (2004), 191

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See detailATP Augments von Willebrand Factor-dependent Shear-induced Platelet Aggregation through Ca2+-Calmodulin and Myosin Light Chain Kinase Activation
Oury, Cécile ULg; Sticker, Elsie; Cornelissen, Heidi et al

in Journal of Biological Chemistry (2004)

Shear stress triggers von Willebrand factor (VWF) binding to platelet glycoprotein Ibalpha and subsequent integrin alpha(IIb)beta(3)-dependent platelet aggregation. Concomitantly, nucleotides are released ... [more ▼]

Shear stress triggers von Willebrand factor (VWF) binding to platelet glycoprotein Ibalpha and subsequent integrin alpha(IIb)beta(3)-dependent platelet aggregation. Concomitantly, nucleotides are released from plateletdense granules, and ADP is known to contribute to shear-induced platelet aggregation (SIPA). This study shows that ATP also contributes to SIPA. The ATP-gated P2X(1) ion channel induces MLC-mediated cytoskeletal rearrangements that increases platelet degranulation during VWF-triggered platelet activation. [less ▲]

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See detailValorisation industrielle de la pomme de terre.
Delaplace, Pierre ULg; Fauconnier, Marie-Laure ULg

in Troupeaux et Cultures des Tropiques (2004)

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See detailAN INTRODUCTION TO ROBOTICS: MECHANICAL ASPECTS
Géradin, Michel ULg; Duysinx, Pierre ULg

Learning material (2004)

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See detailLeçon inaugurale : entre mythes et défis, la forêt en devenir
Rondeux, Jacques ULg

in Bulletin d'Information (Association Royale des Ingénieurs Issus de la Fusagx - Aigx) (2004), (5), 9-15

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See detailLa forêt privée wallonne et sa gestion : des chiffres qui parlent
Colson, Vincent ULg; Puissant, T.; Hebert, Jacques ULg et al

Book (2004)

An investigation relative to Walloon private forest owners was carried out in order to characterise their properties and the management undergone in each one of them, as well as to identify the main ... [more ▼]

An investigation relative to Walloon private forest owners was carried out in order to characterise their properties and the management undergone in each one of them, as well as to identify the main problems the owners encounter. The results of this study emphasise on the existence of multiple aspects of owners and of their properties. The majority of the Walloon private properties represent above all an important inheritance along with a strong sentimental attachment in regards to the owner. A high proportion of owners manage their forest themselves by devoting a lot of time, but without necessarily planning management. This study clearly shows that a large number of owners wish to be more informed and guided. [less ▲]

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See detailInventaire forestier de gestion : proposition d'un cadre méthodologique et technique
Lejeune, Philippe ULg; Rondeux, Jacques ULg

in Forêt Wallonne (2004), (73), 22-29

Confronté à des sollicitations de plus en plus nombreuses envers la forêt, le gestionnaire forestier doit pouvoir disposer d’informations adaptées à la complexité des analyses qu’il est amené à réaliser ... [more ▼]

Confronté à des sollicitations de plus en plus nombreuses envers la forêt, le gestionnaire forestier doit pouvoir disposer d’informations adaptées à la complexité des analyses qu’il est amené à réaliser. Les progrès récents en matière de cartographie donnent accès à une information très précieuse. L’inventaire forestier reste cependant l’outil le plus adapté pour une description, tant qualitative que quantitative, des peuplements et de leurs diverses composantes. Ces inventaires ne peuvent cependant plus se limiter au simple recensement du matériel sur pied présent au sein des différentes parcelles d’une propriété. [less ▲]

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