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See detailDe la littérature industrielle au poème populaire moderne. Filtrages médiatiques et littéraires de la culture de masse au XIXe siècle
Durand, Pascal ULg

in Mollie, Jean-Yves; Sirinelli, Jean-François (Eds.) Culture de masse et culture médiatique en Europe et dans les Amériques (1860-1940) (2006)

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See detailCompaction of granular materials: experiments and contact dynamics simulations
Lumay, Geoffroy ULg; Ludewig, François ULg; Vandewalle, Nicolas ULg

in Journal of Physics: Conference Series (2006), 40

We present an original experimental study of the slow compaction dynamics for two- dimensional isotropic granular systems. Compaction dynamics is measured at three different scales : the macroscopic scale ... [more ▼]

We present an original experimental study of the slow compaction dynamics for two- dimensional isotropic granular systems. Compaction dynamics is measured at three different scales : the macroscopic scale through the normalized packing fraction ˜ ρ, the mesoscopic scale through the normalized fraction ˜ φ of domains ideally ordered in the system, and the microscopic scale through the grain mobility μ. The domains ideally ordered are found to obey a growth process dominated by the displacement of domain boundaries. We present also preliminary results of three-dimensional simulations with a model of contact dynamics. These results allow to discuss the difference between the two-dimensional and the three-dimensional cases. [less ▲]

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See detailA Principal-Agent Theory Approach to Public Expenditure Management Systems in Developing Countries
Leruth, Luc ULg; Paul, Elisabeth ULg

in IMF Working Paper (2006), 06/204

A well-functioning public expenditure management (PEM) system is considered a critical pillar of government efficiency, on par with a low-distortion tax system and efficient tax administration. The paper ... [more ▼]

A well-functioning public expenditure management (PEM) system is considered a critical pillar of government efficiency, on par with a low-distortion tax system and efficient tax administration. The paper discusses PEM systems in developing countries using an analytical framework based on principal-agent theory. This simple model can be applied to various PEM systems, and allows for comparisons between institutional settings. To illustrate this, we analyze the benefits derived from the use by the Ministry of Finance (MoF) of two control instruments; ex post audits and ex ante controls, and assess their value in terms of their ability to deter cheating. We derive a set of possible “control regimes” which can be used by the MoF. Although we illustrate the use of the model using developing countries, it is also relevant to developed economies. [less ▲]

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See detailMatériel et méthode de la constitution des valeurs de référence
WANG, François-Charles ULg

in Neurophysiologie Clinique = Clinical Neurophysiology (2006)

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See detailNumerical study of the fatigue crack in welded beam-to-column connection using cohesive zone model
Lequesne, Cédric ULg; Plumier, André ULg; Degée, Hervé ULg et al

in Proceedings of the International Conference on Fracture and Damage Mechanics V (2006)

The fatigue behaviour of the welded beam-to-column connections of steel moment resisting frame in seismic area must be evaluated. The cohesive zone model is an efficient solution to study such connections ... [more ▼]

The fatigue behaviour of the welded beam-to-column connections of steel moment resisting frame in seismic area must be evaluated. The cohesive zone model is an efficient solution to study such connections by finite elements. It respects the energetic conservation and avoids numerical issues. A three-dimensional cohesive zone model element has been implemented in the home made finite element code Lagamine [1]. It is coupled with the fatigue continuum damage model of Lemaître and Chaboche [2]. The cohesive parameters are identified by the inverse method applied on a three points bending test modelling. [less ▲]

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See detailA fourth level of Frasnian carbonate mounds along the south side of the Dinant Synclinorium (Belgium)
Boulvain, Frédéric ULg; Coen-Aubert, M.

in Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre (2006), 76

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium ... [more ▼]

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium. It occurs between the Arche and Lion Members belonging respectively to the Moulin Liénaux and Grands Breux Formations, in the middle part of the stage. The new name of La Boverie Member is introduced at the top of the Moulin Liénaux Formation, for the deposits lying between the Arche and Bieumont Members; the latter is the basement of the Lion mound. The same succession has been observed in the sections of Moulin Bayot close to Vodelée, in the southeastern part of the Philippeville Anticlinorium. The La Boverie Member starts with rather deep bioclastic sediments, after the collapse of the carbonate factory at the top of the Arche mound. In the upper part of the lithostratigraphic unit, there is a thin buildup characterized by relatively shallow facies. The solitary rugose corals Macgeea boveriensis n. sp., M. socialis SOSHKINA, 1939 and Sinodisphyllum posterum (IVANIA, 1965) collected in the lower part of the La Boverie Member are described in detail whereas the revision of S. kielcense (ROZKOWSKA, 1979) occurring in the Bieumont Member is also provided. [less ▲]

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See detailBiodegradable microparticles loaded with thrombin receptor agonist peptide for gastric ulcer treatment in rats
Markvicheva, E.; Stashevskaya, K.; Strukova, S. et al

in Journal of Drug Delivery Science and Technology (2006), 16(4, JUL-AUG), 321-325

The aim of the current paper was to elaborate an immobilization method of thrombin receptor agonist peptide (TRAP-6) in biodegradable biocompatible poly(d,l)-lactide-co-glycolide (PLGA) inicroparticles ... [more ▼]

The aim of the current paper was to elaborate an immobilization method of thrombin receptor agonist peptide (TRAP-6) in biodegradable biocompatible poly(d,l)-lactide-co-glycolide (PLGA) inicroparticles and to demonstrate the effect of the entrapped peptide for tissue repair, namely,for a gastric ulcer treatment in rats. TRAP-6 was entrapped in polymer using w/o/w double emulsion-evaporation technique. The morphology of empty and TRAP-6 loaded microparticles was evaluated by light and scanning electron microscopy (SEM). In vitro release kinetics profile of TRAP-6 from microparticles was studied by HPLC. To investigate gastric mucosal protection effect in vivo, TRAP-6-loaded microparticles were administered in a rat stomach after a previous mucosal injury (a gastric ulcer). Microparticles with entrapped TRAP-6 were found to reduce both an inflammation and proliferation phases of wound healing, and thus accelerated tissue repair in rats. [less ▲]

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See detailExercise and pharmacological echocardiography stress in healthy horses
Sandersen, Charlotte ULg; Detilleux, Johann ULg; Art, Tatiana ULg et al

in Proceedings of the 7th ICEEP (Equine veterinary supplement 206, 36:159-162) (2006)

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See detailRapid changes in production and behavioral action of estrogens.
Balthazart, Jacques ULg; Cornil, Charlotte ULg; Taziaux, Mélanie ULg et al

in Neuroscience (2006), 138(3), 783-91

It is well established that sex steroid hormones bind to nuclear receptors, which then act as transcription factors to control brain sexual differentiation and the activation of sexual behaviors ... [more ▼]

It is well established that sex steroid hormones bind to nuclear receptors, which then act as transcription factors to control brain sexual differentiation and the activation of sexual behaviors. Estrogens locally produced in the brain exert their behavioral effects in this way but mounting evidence indicates that estrogens also can influence brain functioning more rapidly via non-genomic mechanisms. We recently reported that, in Japanese quail, the activity of preoptic estrogen synthase (aromatase) can be modulated quite rapidly (within minutes) by non-genomic mechanisms, including calcium-dependent phosphorylations. Behavioral studies further demonstrated that rapid changes in estrogen bioavailability, resulting either from a single injection of a high dose of estradiol or from the acute inhibition of aromatase activity, significantly affect the expression of both appetitive and consummatory aspects of male sexual behavior with latencies ranging between 15 and 30 min. Together these data indicate that the bioavailability of estrogens in the brain can change on different time-scales (long- and short-term) that match well with the genomic and non-genomic actions of this steroid and underlie two complementary mechanisms through which estrogens modulate behavior. Estrogens produced locally in the brain should therefore be considered not only as neuroactive steroids but they also display many (if not all) functional characteristics of neuromodulators and perhaps neurotransmitters. [less ▲]

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See detailMathematical modeling of bone regeneration including the angiogenic process
Geris, Liesbet ULg; Vander Sloten, Jos; Van Oosterwyck, Hans

in Journal of Biomechanics (2006), 39(S1), 411-412

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See detailAnalytical validation of potentiometric method for cetirizinium ion
Rachidi, Mohamed ULg; Digua, K.; Hubert, Philippe ULg et al

in Analytical Letters (2006), 39(8), 1699-1708

Accuracy and reliability of the analytical results are crucial for ensuring quality, safety, and efficacy of pharmaceutical products. However, to ensure these criteria, analytical validation is required ... [more ▼]

Accuracy and reliability of the analytical results are crucial for ensuring quality, safety, and efficacy of pharmaceutical products. However, to ensure these criteria, analytical validation is required. In this matter, many official documents describing the criteria of validation are available. However, these concern mainly chromatography analysis and bio-analytical methods of pharmaceutical products, but they do not propose any experimental protocol for direct potentiometric methods using ion-selective electrodes applied in pharmaceutical analysis. In this work, we are proposing a validation strategy based on the normative and regulatory guidelines applied to a potentiometric method with a polymeric membrane selective to cetirizine dihydrochloride. The statistical analysis obtained from raw data is described for all steps of this protocol. Also this validated method was successfully applied to the determination of cetirizine in pharmaceutical preparations using direct potentiometry with a mean relative standard deviation of 0.57% and a mean recovery of 99.63%. [less ▲]

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See detailUV-targeted dinucleotides are not depleted in light-exposed prokaryotic genomes
Palmeira, Leonor ULg; Gueguen, Laurent; Lobry, Jean R

in Molecular Biology and Evolution (2006), 23(11), 2214--2219

We have investigated the hypothesis that pyrimidine dinucleotides are avoided in light-exposed genomes as the result of selective pressure due to high ultraviolet (UV) exposure. The main damage to DNA ... [more ▼]

We have investigated the hypothesis that pyrimidine dinucleotides are avoided in light-exposed genomes as the result of selective pressure due to high ultraviolet (UV) exposure. The main damage to DNA produced by UV radiation is known to be the formation of pyrimidine photoproducts: it is estimated that about 10 dimers per minute are formed in an Escherichia coli chromosome exposed to the UV light in direct overhead sunlight at sea level. It is also known that on an E. coli chromosome exposed to UVb wavelengths (290-320 nm), pyrimidine photoproducts are formed in the following proportions: 59 TpT, 7 CpC, and 34 CpT plus TpC. We have analyzed all available complete prokaryotic genomes and the model organism Prochlorococcus marinus and have found that pyrimidine dinucleotides are not systematically avoided. This suggests that prokaryotes must have sufficiently effective protection and repair systems for UV exposure to not affect their dinucleotide composition. [less ▲]

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See detailComparative assessment of old and new suboptimal control schemes on three example processes
Journee, Michel ULg; Schweickhardt, T.; Allgöwer, Frank

in Proceedings of the 13th IFAC Workshop on Control Applications of Optimisation, Paris (2006)

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See detailComputation of the sensitivity matrix used for Elasto-plastic material parameter identification by inverse methods
Cooreman, Steven; Bouffioux, Chantal ULg; Lecompte, David et al

in Congress on theoretical and applied Mechanics, Mons, Belgium, May 2006 (2006)

Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which ... [more ▼]

Inverse methods offer a powerful tool for the determination of the elasto-plastic material properties. Contrary to standard tests, these methods can deal with heterogeneous stress and strain-fields which have a larger information contents and hence allow the simultaneous identification of several material parameters. Moreover, it is expected that the obtained material parameters are more accurate, since these heterogeneous deformation fields are much closer to those occurring in real (metal) forming operations. The principle of the inverse method for the identification of material parameters presented in this paper is to compare an experimentally measured strain field to that computed by a Finite Element (FE) model. The material parameters in the FE model are iteratively tuned in such a way that both strain fields match each other as closely as possible. One of the building blocks in this identification procedure is the updating algorithm for the material parameters in the FE model. The key problem of this updating algorithm is the determination of the sensitivity matrix, which expresses the sensitivities of the strains with respect to the material parameters. This paper presents an analytical method for the calculation of this sensitivity matrix in case of simple tensile tests. [less ▲]

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See detailSound production mechanism in Amphiprion clarkii (Teleostei: Pomacentridae)
Colleye, Orphal ULg; Herrel, Anthony; Vandewalle, Pierre ULg et al

Poster (2006)

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social ... [more ▼]

In the family Pomacentridae, six genera were reported as sound producers: Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf and Plectroglyphidodon. The anemonefishes (Amphiprioninae) live in social group in association with sea anemones, which protect them from predators. Their sound emissions seem involved in courtship and territorial defense, contributing to both survival and reproductive success. However, the mechanism of sound production is unresolved. It has been hypothesized that it involves swimbladder or the action of the pharyngeal jaws amplified by swimbladder. The aim of this study was to understand the sonic mechanism involved in the agonistic sounds in Amphiprion clarkii. The approach consists in high-speed cineradiography and functional morphology. During agonistic sounds (pops), fishes perform different movements such as skull elevation, pectoral girdle retraction, hyoid lowering and mouth closing. Pops are produced when the hyoid is completely lowered and the mouth closed. The simultaneous realization of these movements was never observed in teleost. In Amphiprion sp., it is possible due to an additional ligament inserted on the hyoid bar and on the inner lower jaw. The hyoid lowering combined to the closing (and thus the elevation) of the mandible could generate a tension of the ligament, provoking its vibration [less ▲]

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See detailExposé des faits entourant la procédure relative aux projets d’autoroute : le cas du tracé d’une voie à grand gabarit au Sud de Charleroi (entre Charleroi et Somzée) et le cas du contournement de Couvin et son prolongement par la liaison Couvin-Bruly
Hanson, Sophie ULg

in Spannowsky (Ed.) Planification et autorisation des autoroutes - Comparaison des systèmes d'aménagement du territoire dans la Grande Région "Sarre, Lorraine, Grand-Duché de Luxembourg, Région wallonne et Rhénanie-Palatinat (2006)

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See detailLes clauses d'un contrat de vie commune d'un couple non marié
Dehalleux, Virginie ULg

in Leleu, Yves-Henri (Ed.) Aspects actuels de la programmation patrimoniale dans la famille (2006)

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