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See detailNouvelles datations de deux ensembles aurignaciens du bassin mosan
Flas, Damien ULg

in Anthropologica et Praehistorica : Bulletin de la Société Royale Belge d'Anthropologie et de Préhistoire (2005), 116

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See detailDéfinir le patrimoine culturel immatériel... une gageure ?
Lempereur, Françoise ULg

in Rabaska : Revue d'Ethnologie de l'Amérique Française (2005), 3

In 2004, Bernard Genest and Camille Lapointe published a research paper about the intangible cultural heritage as a social and economical wealth, token of the Quebec Ministery of Culture policy. Françoise ... [more ▼]

In 2004, Bernard Genest and Camille Lapointe published a research paper about the intangible cultural heritage as a social and economical wealth, token of the Quebec Ministery of Culture policy. Françoise Lempereur shows the relevance of this document and analyses it. [less ▲]

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See detailEvaluation of the DR-CALUX screening of food and feed, according to regulation levels including DL-PCB
Scippo, Marie-Louise ULg; Rybertt, Soledad; Focant, Jean-François ULg et al

in Organohalogen Compounds (2005), 67

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See detailL'aide contrainte: contenant ouvert, mentalisation et loi
Malchair, Alain ULg

in MISSON, Francis; PONCELET, Muguette; HANNECART, Pierre (Eds.) Enfants maltraités, jeunes en danger, entre social et justice (2005)

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See detailDecalactone production by Yarrowia lipolytica under increased O2 transfer rates
Aguedo, Mario ULg; Gomes, N.; Garcia, E. E. et al

in Biotechnology Letters (2005), 27(20), 1617-1621

Yarrowia lipolytica converts methyl ricinoleate to γ-decalactone, a high-value fruity aroma compound. The highest amount of 3-hydroxy-γ- decalactone produced by the yeast (263 mg∈l-1) occurred by ... [more ▼]

Yarrowia lipolytica converts methyl ricinoleate to γ-decalactone, a high-value fruity aroma compound. The highest amount of 3-hydroxy-γ- decalactone produced by the yeast (263 mg∈l-1) occurred by increasing the k L a up to 120 h-1 at atmospheric pressure; above it, its concentration decreased, suggesting a predominance of the activity of 3-hydroxyacyl-CoA dehydrogenase. Cultures were grown under high-pressure, i.e., under increased O2 solubility, but, although growth was accelerated, γ-decalactone production decreased. However, by applying 0.5 MPa during growth and biotransformation gave increased concentrations of dec-2-en-4-olide and dec-3-en-4-olide (70 mg∈l -1). © Springer 2005. [less ▲]

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See detailSlavery Revisited through Vocal Kaleidoscopes: Polyphony in Novels by Fred D'Aguiar and Caryl Phillips
Ledent, Bénédicte ULg

in Misrahi-Barak (Ed.) Revisiting Slave Narratives / Le avatars contemporains des récits d'esclaves (2005)

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See detailSurface properties of Yarrowia lipolytica and their relevance to γ-decalactone formation from methyl ricinoleate
Aguedo, Mario ULg; Waché, Y.; Belin, J.-M. et al

in Biotechnology Letters (2005), 27(6), 417-422

The surface of the lipid-degrading yeast, Yarrowia lipolytica, was characterized by contact angle and zeta potential (ζ) measurements. The cells were mainly hydrophilic with a negative charge that was ... [more ▼]

The surface of the lipid-degrading yeast, Yarrowia lipolytica, was characterized by contact angle and zeta potential (ζ) measurements. The cells were mainly hydrophilic with a negative charge that was only affected from pH 2 to 4. To study the effects of the surface charges on the biotransformation of methyl ricinoleate into the aroma compound, γ-decalactone, the ζ values of the substrate droplets were modified by adding a cationic surfactant into the medium at concentrations that did not diminish cell viability: the adhesion of the lipid substrate to the cells was increased but not the overall performance of the process, therefore the adhesion is not the rate limiting here. Our methodology offers interesting perspectives for further applications. © Springer 2005. [less ▲]

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See detailEXploration des processus inhibiteurs dans le vieillissement normal et la maladie d'Alzheimer
Collette, Fabienne ULg; Adam, Stéphane ULg; Hogge, Michaël et al

in Revue Neurologique (2005), 161(12), 467

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See detailIntegrated Simulation and Reduced-Order Modeling of Controlled Flexible Multibody Systems
Bruls, Olivier ULg

Doctoral thesis (2005)

A mechatronic system is an assembly of technological components, such as a mechanism, sensors, actuators, and a control unit. Recently, a number of researchers and industrial manufacturers have ... [more ▼]

A mechatronic system is an assembly of technological components, such as a mechanism, sensors, actuators, and a control unit. Recently, a number of researchers and industrial manufacturers have highlighted the potential advantages of lightweight parallel mechanisms with respect to the accuracy, dynamic performances, construction cost, and transportability issues. The design of a mechatronic system with such a mechanism, requires a multidisciplinary approach, where the mechanical deformations have to be considered. This thesis proposes two original contributions in this framework. First, a modular and systematic method is developed for the integrated simulation of mechatronic systems, which accounts for the strongly coupled dynamics of the mechanical and non-mechanical components. The equations of motion are formulated using the nonlinear Finite Element approach for the mechanism, and the block diagram language for the control system. The time integration algorithm relies on the generalized-alpha method, known in structural dynamics. Hence, well-defined concepts from mechanics and from system dynamics are combined in a unified formulation, with guaranteed convergence and stability properties. Several applications are treated in the fields of robotics and vehicle dynamics. Usual methods in flexible multibody dynamics lead to complex nonlinear models, not really suitable for control design. Therefore, a systematic nonlinear model reduction technique is presented, which transforms an initial high-order Finite Element model into a low-order and explicit model. The order reduction is obtained using the original concept of Global Modal Parameterization: the motion of the assembled mechanism is described in terms of rigid and flexible modes, which have a global physical interpretation in the configuration space. The reduction procedure involves the component-mode technique and an approximation strategy in the configuration space. Two examples are presented: a four-bar mechanism, and a parallel kinematic machine-tool. Finally, both simulation and modeling tools are exploited for the dynamic analysis and the control design of an experimental lightweight manipulator with hydraulic actuators. A Finite Element model is first constructed and validated with experimental data. A reduced model is derived, and an active vibration controller is designed on this basis. The simulation of the closed-loop mechatronic system predicts remarkable performances. The model-based controller is also implemented on the test-bed, and the experimental results agree with the simulation results. The performances and the other advantages of the control strategy demonstrate the relevance of our developments in mechatronics. [less ▲]

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See detailGrey level intercepts distributions and grain size estimation
Lebichot, Sophie; Dislaire, Godefroid; Pirard, Eric ULg et al

in Proceedings 8th European Congress for Stereology and Image Analysis (2005)

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See detailThe Historical Inscription on Queen Hatshepsut's Chapelle Rouge
Gillen, Todd Jonathan ULg

in Bulletin of the Australian Centre for Egyptology (2005), 16

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See detailDu matérialisme historique au post-matérialisme
Jacquemain, Marc ULg

E-print/Working paper (2005)

Le matérialisme historique s'appuie sur le postulat fondamental que le moteur de l'histoire, ce qui "met les choses en mouvement" est à rechercher dans l'organisation concrète de la vie matérielle. Et en ... [more ▼]

Le matérialisme historique s'appuie sur le postulat fondamental que le moteur de l'histoire, ce qui "met les choses en mouvement" est à rechercher dans l'organisation concrète de la vie matérielle. Et en particulier, les idées et valeurs d'une époque reflètent fondamentalement les conditions de production de l'époque en question. Le politologue américain Ronald Inglehart, dans sa théorie du "postmatérialisme" ne dit finalement rien d'autre, alors qu'il est très loin par ailleurs d'être un marxiste. Mais il y a joute une solide nuance : l'explication matérialiste est "vouée à la loi des rendements décroissants". Autrement dit, les différences de condition matérielle expliquent beaucoup de chose lorsque les sociétés n'ont pas encore "décollé" mais elles expliquent de moins en moins à mesure que les sociétés deviennent plus riches. Lorsqu'un certain seuil de confort matériel est atteint, le lien se casse entre développement économique et évolution des valeurs. [less ▲]

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See detailDoes cardiac surgery in newborn infants compromise blood cell reactivity to endotoxin?
Schumacher, Katharina; Korr, Stefanie; Vazquez-Jimenez, Jaime F et al

in Critical Care (2005), 9(5), 549-55

INTRODUCTION: Neonatal cardiac surgery is associated with a systemic inflammatory reaction that might compromise the reactivity of blood cells against an inflammatory stimulus. Our prospective study was ... [more ▼]

INTRODUCTION: Neonatal cardiac surgery is associated with a systemic inflammatory reaction that might compromise the reactivity of blood cells against an inflammatory stimulus. Our prospective study was aimed at testing this hypothesis. METHODS: We investigated 17 newborn infants with transposition of the great arteries undergoing arterial switch operation. Ex vivo production of the pro-inflammatory cytokine tumor necrosis factor-alpha (TNF-alpha), of the regulator of the acute-phase response IL-6, and of the natural anti-inflammatory cytokine IL-10 were measured by enzyme-linked immunosorbent assay in the cell culture supernatant after whole blood stimulation by the endotoxin lipopolysaccharide before, 5 and 10 days after the operation. Results were analyzed with respect to postoperative morbidity. RESULTS: The ex vivo production of TNF-alpha and IL-6 was significantly decreased (P < 0.001 and P < 0.002, respectively), whereas ex vivo production of IL-10 tended to be lower 5 days after the operation in comparison with preoperative values (P < 0.1). Ex vivo production of all cytokines reached preoperative values 10 days after cardiac surgery. Preoperative ex vivo production of IL-6 was inversely correlated with the postoperative oxygenation index 4 hours and 24 hours after the operation (P < 0.02). In contrast, postoperative ex vivo production of cytokines did not correlate with postoperative morbidity. CONCLUSION: Our results show that cardiac surgery in newborn infants is associated with a transient but significant decrease in the ex vivo production of the pro-inflammatory cytokines TNF-alpha and IL-6 together with a less pronounced decrease in IL-10 production. This might indicate a transient postoperative anti-inflammatory shift of the cytokine balance in this age group. Our results suggest that higher preoperative ex vivo production of IL-6 is associated with a higher risk for postoperative pulmonary dysfunction. [less ▲]

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See detailPROMPT New means to PROMote Pedestrian Traffic in cities
Rauhala, Kari; Martincigh, Lucia; Hüsler, Willi et al

Report (2005)

The main objective of the PROMPT project was to develop new innovative tools and solutions to improve the conditions of walking in cities. Their scope ranges from the urban level to the detailed street ... [more ▼]

The main objective of the PROMPT project was to develop new innovative tools and solutions to improve the conditions of walking in cities. Their scope ranges from the urban level to the detailed street level. They are aimed at problem identification, design and planning as well as at the implementation of considered measures in widely different situations. [less ▲]

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See detailInfluence of zooplankton stoichiometry on nutrient sedimentation in a lake system
Darchambeau, François ULg; Thys, I.; Leporcq, B. et al

in Limnology & Oceanography (2005), 50(3), 905-913

We explored rates and stoichiometry (C: N: P ratios) of sinking particles in a temperate reservoir during a 2-yr period. Plankton was sampled weekly, and a sediment trap placed below the metalimnion ... [more ▼]

We explored rates and stoichiometry (C: N: P ratios) of sinking particles in a temperate reservoir during a 2-yr period. Plankton was sampled weekly, and a sediment trap placed below the metalimnion collected sinking particles. There were no significant relationships between the stoichiometry of entrapped material and seston or zooplankton stoichiometry. However the differences in the entrapped C: P and N: P ratios between consecutive trap samplings were negatively correlated with the time variations of the zooplankton C: P and N: P ratios. Zooplankton C: P and N: P ratios were positively correlated with the percentage of copepod biomass in total zooplankton biomass > 250 mu m and negatively correlated with the percentage of cladocerans. Zooplankton biomass > 250 mu m reduced the fraction of N and P primary production lost to sinking (export ratio). The residuals of the N export ratio versus zooplankton biomass relationship were negatively correlated with the zooplankton N: P ratio, whereas there was a positive relationship with the residuals of the P export ratio relationship. These observations support the hypothesis that the regulation of elemental homeostasis in the herbivorous zooplankton consumers occurs at least partly at the assimilation/egestion level. Elements ingested in excess-P for the herbivorous copepods and N for many cladocerans-are concentrated into sinking feces, whereas the deficient elements are captured into biomass. [less ▲]

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See detailCompte-rendu de l'ouvrage de J.M. Klinkenberg : Petites mythologies belges
Curreri, Luciano ULg

in Textyles : Revue des Lettres Belges de Langue Française (2005), 26-27

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See detailDé-transposition et décalage interdisciplinaire : l'exemple de l'élasticité de la demande
Henry, Valérie ULg

in Repères : Revue des Instituts de Recherche sur l'Enseignement des Mathématiques (2005), 141

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See detailL'impact des changements vécus par les travailleurs sur le bien-être au travail : Analyse de la base de données Flexihealth.
Hansez, Isabelle ULg; Grisard, Anne; De Keyser, Véronique ULg et al

in Battistelli, A.; Depolo, M.; Fraccaroli, F. (Eds.) La qualité de vie au travail dans les années 2000. (2005)

La recherche ‘Flexihealth’, portant sur 4961 travailleurs belges, vise à établir un lien entre les changements majeurs, la perception des modifications des conditions de travail qu’ils impliquent et le ... [more ▼]

La recherche ‘Flexihealth’, portant sur 4961 travailleurs belges, vise à établir un lien entre les changements majeurs, la perception des modifications des conditions de travail qu’ils impliquent et le bien-être des travailleurs. Les résultats montrent que les changements vécus ont un impact négatif significatif non seulement sur les conditions de travail mais aussi sur le bien-être des travailleurs. Ce résultat doit toutefois être nuancé selon le type de changement vécu. En ce sens, le changement de supérieur et le changement de tâches sont davantage préjudiciables pour les travailleurs. L’âge et la catégorie professionnelle des travailleurs sont également des variables considérées pour nuancer ces résultats. Ainsi, les travailleurs âgés de 46 à 55 ans ainsi que les ouvriers constituent des groupes à risques. [less ▲]

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