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See detailICON: The Ionospheric Connection Explorer - NASA's Next Space Physics and Aeronomy Mission
Immel, T. J.; Mende, S. B.; Heelis, R. A. et al

Conference (2013)

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See detailRole of SoxE genes in the development of the auditory portion of the inner ear
Delacroix, Laurence ULg

Conference (2013)

The transcription factors of the SoxE family, including Sox8, Sox9 and Sox10 play important roles in diverse developmental processes and particularly in the development of the auditory portion of the ... [more ▼]

The transcription factors of the SoxE family, including Sox8, Sox9 and Sox10 play important roles in diverse developmental processes and particularly in the development of the auditory portion of the inner ear, the cochlea. Among these regulatory genes, Sox9 has been shown to be important in otic vesicle formation during early embryonic development. Indeed, Sox9 expression is detected as soon as embryonic day E9, in the forming otic placode. As the organ of Corti begins to differentiate, Sox9 is progressively restricted to supporting cells and its expression is absent from hair cells, responsible for sound transduction. This expression profile prompted us to evaluate the role of this gene in cochlear cell terminal differentiation. We therefore analysed the role of Sox9 in cell specification using both gain- and loss-of function approaches. We demonstrated, by ex vivo electroporation of mouse embryonic cochlea that Sox9 strongly inhibits hair cell fate even when it is forced by ectopic expression of Atoh1, a potent inducer of hair cell differentiation. On the contrary, suppression of Sox9 in sensory progenitors did not affect cell fate. We also showed that Sox9 is upregulated by Notch activation in mouse embryonic cochlea and partially contributes to Notch inhibition of hair cell fate. Loss of Notch signaling in cells that are committed to become hair cells could thus be responsible for Sox9 suppression in these cells. In parallel, we investigated the molecular mechanisms underlying Sox9 inhibitory effect on hair cell fate in UB/OC1 cell line (derived from mouse embryonic otocyst) and more specifically its relationship with other important factors for cell specification. We observed an inhibition of Atoh1 transcriptional activity upon Sox9 overexpression, concomitant with an increase in the expression levels of Hey1 and HeyL factors. These proteins are well-known effectors of the Notch cascade and act by inhibiting Atoh1 activity. Taken together, our data suggest that Sox9 potentiates Notch pathway by upregulating its effectors Hey1 and HeyL and that Sox9 misexpression in differentiating hair cells inhibits the activity of the major hair cell fate inducer Atoh1, thereby preventing sensory cell terminal differentiation. [less ▲]

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See detailGenetic engineering of lipopeptide non-ribosomal peptide synthesis in Bacillus subtilis
Bechet, M.; Coutte, F.; Leclere, V. et al

Conference (2013)

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See detailNovel biosurfactants with biocontrol activity and low ecotoxicity
Jacques, Philippe ULg; Bechet, M.; Castera-Guy, J. et al

Conference (2013)

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See detailÀ propos de l’écologie du discours heuristique
Job, Pierre ULg; Gilot, Marguerite ULg

Conference (2013)

Detailed reference viewed: 34 (2 ULg)
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See detailMeet the Experts. External nasal valve collapse: Assessment and management algorithm.
POIRRIER, Anne-Lise ULg; Andrews, Peter

Conference (2013)

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See detailEffects of neonatal DES and BPA exposure on the timing of female sexual maturation through neuroendocrine disruption.
Franssen, Delphine ULg; Ioannou, Yannis; Alvarez-Real, Alexandra et al

Conference (2013)

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See detailOptiMIR : de nouveaux outils de management des exploitations laitières grâce au spectre moyen infra-rouge du lait
Grelet, Clément ULg; Fernandez Pierna, Juan Antonio; Dehareng, Frédéric et al

Conference (2013)

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See detailStandardisation of milk MIR spectra: a first step to create new tools of dairy farm management
Grelet, Clément ULg; Fernandez Pierna, Juan Antonio; Dehareng, Frédéric et al

Conference (2013)

Detailed reference viewed: 18 (2 ULg)
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See detailAnnual meeting of the SBN/BVN
BOUQUEGNEAU, Antoine ULg; DELANAYE, Pierre ULg; CAVALIER, Etienne ULg et al

Conference (2013)

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See detailCalcium isotope fractionations from roots to shoots
Schmitt, A.-D.; Stille, P.; Labolle, F. et al

Conference (2013)

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See detailEconomic resilience of Genocide widows of AVEGA in Eastern Province of Rwanda
Militery Ngamata, Olivier ULg; Mbonyinkebe, Deo; Lebailly, Philippe ULg

Conference (2013)

AVEGA is a non-profit making organization of Rwanda genocide widows which was established in 1995. It renders and performs its activities all over Rwanda. It is comprised of 20,312 widows and 71,478 of ... [more ▼]

AVEGA is a non-profit making organization of Rwanda genocide widows which was established in 1995. It renders and performs its activities all over Rwanda. It is comprised of 20,312 widows and 71,478 of their dependants, mainly orphans (AVEGA, Annual report, 2012).The association helps widows and their dependents escape the poverty, anguish and misery that filled their lives following the genocide of 1994. It works with others partners to improve the social economic conditions of members. This paper analyses focus on the Eastern Province Branch and examines the social economic resilience of different projects realized, among them livestock projects, handcraft projects, business projects, crop husbandry such as the pepper project, and the livelihood program, in one hand; in other hand, the association had put in place some projects which help to produce revenue for the finance himself. The establishment of these economic activities for widows (individually or cooperatives) has improved the welfare and living standards of the beneficiaries and has taught them to initiate and maintain sustainable projects rather than to be too reliant on others. This has helped to rebuild the confidence of beneficiaries, and though many still endure extreme poverty, it has helped them to make a step towards greater independence. [less ▲]

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See detailAnalyse et stratégies de l’agriculture familiale dans un pays post-conflit : cas de la province de Kirundo au nord du Burundi
Minani, Bonaventure ULg; Rurema, Déo-Guide; Lebailly, Philippe ULg

Conference (2013)

Les fermiers de la province de Kirundo pratiquaient l’agriculture familiale orientée vers le marché. Aujourd’hui, cette agriculture est tournée vers l’autoconsommation. Pour bien comprendre les ... [more ▼]

Les fermiers de la province de Kirundo pratiquaient l’agriculture familiale orientée vers le marché. Aujourd’hui, cette agriculture est tournée vers l’autoconsommation. Pour bien comprendre les contraintes rencontrées par les fermiers, 355 exploitants agricoles ont été choisis aléatoirement dans toutes les communes de cette province. Les résultats issus de cette enquête montrent que l’insuffisance de la main d’oeuvre, du matériel agricole, des intrants agricoles, de protection des sols, la persistance des conflits fonciers, le manque de microcrédit, l’amenuisement des terres, etc. sont les principales contraintes entravant le développement de l’agriculture familiale dans cette région. [less ▲]

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See detailSystematic research on the selectivity of plant-material extraction processes
Bol, J B; Pfennig, Andreas ULg

Conference (2013)

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See detailRestaurer les campos rupestres, pelouses tropicales d’altitude
Le Stradic, Soizig ULg; Buisson, Elise; Fernandes, Geraldo Wilson

Conference (2013)

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See detailNouvelles recommendations K/DIGO et transplantation rénale : quelle place pour la cystatine C ?
Masson, I; Maillard, N; Alamartine, E et al

Conference (2013)

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See detailEigenproblem formulation for electromechanical microsystem pull-in voltage optimization
Lemaire, Etienne ULg; Van Miegroet, Laurent ULg; Tromme, Emmanuel ULg et al

Conference (2013)

Electrostatic actuators are often used in MEMS since they are relatively easy to manufacture and provide a short response time. Previous studies have already considered topology optimization of such micro ... [more ▼]

Electrostatic actuators are often used in MEMS since they are relatively easy to manufacture and provide a short response time. Previous studies have already considered topology optimization of such micro-actuators like the work by Raulli and Maute [1] and by Yoon and Sigmund [2]. Raulli considers maximization of the actuator output displacement for given electric potential input locations. The paper by Yoon et al. goes further by replacing the staggered modeling used by Raulli by a monolithic approach where both physical fields (electric and mechanical) are solved at once. However, electrostatic micro-actuators possess a limit input voltage called the pull-in voltage, beyond which they become unstable. If a voltage greater than the pull-in voltage is applied to the device, elastic forces of the suspension system are not able to balance electrostatic forces and electrodes stick together. In some cases, the pull-in effect can damage the device. Previous researches by the authors [3] have considered the possibility to control pull-in voltage using topology optimization. In this first approach, pull-in voltage itself was included in the optimization problem and treated as objective function. Nevertheless, in some applications, the developed pull-in voltage optimization procedure suffers from design oscillations that prevent from reaching solution. As illustrated in this paper, the issue is similar to the mode switching problem that arises in eigenvalue optimization problems. The classical solution to this issue consists in including several eigenvalues in a ‘max-min’ formulation. However as the classical pull-in voltage optimization problem is not formulated as an eigenproblem, direct application is not possible. Indeed, pull-in being a nonlinear instability phenomenon, strictly speaking, it is only possible to compute one instability mode and upcoming instability modes cannot be captured. Therefore, this paper is dedicated to the development of a linear eigenproblem approximation for the nonlinear stability problem after the work on nonlinear buckling by Lindgaard and Lund [4]. The proposed stability eigenproblem leads to an alternative optimization procedure aiming at maximizing pull-in voltage. The first eigenmode corresponds to the actual pull-in mode while higher order modes allow estimating upcoming instability modes. Using a multiobjective formulation to maximize the smallest eigenvalue of the stability problem, it is possible to circumvent oscillation issues met with pull-in voltage optimization. Moreover, numerical results show that even if the eigenproblem formulation is an approximation of the actual pull-in voltage optimization problem, eigenproblem formulation leads to significant improvement of pull-in voltage. References [1] M. Raulli and K. Maute, Topology optimization of electrostatically actuated Microsystems, Struct. & Mult. Opt., 30(5):342-359, November 2005. [2] G.H. Yoon and O. Sigmund, A monolithic approach for topology optimization of electrostatically actuated devices, Comput. Methods Appl. Mech. Engrg., 194:4062-4075, 2008. [3] E. Lemaire, V. Rochus, J.-C. Golinval, and P. Duysinx, Microbeam pull-in voltage topology optimization including material deposition constraint, Comput. Methods Appl. Mech. Engrg., 194:4040-4050, 2008. [4] E. Lindgaard and E. Lund, Nonlinear bucking optimization of composite structures, Comput. Methods Appl. Mech. Engrg., 199:37-40, 2010. [less ▲]

Detailed reference viewed: 108 (28 ULg)
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See detailWhat about treatments for patients with disorder of consciousness
Thibaut, Aurore ULg

Conference (2013)

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See detailEnforcement of rules – an empirical study of IAS 36 – impairment of assets
Yammine, Mira ULg; Olivier, Henri ULg

Conference (2013)

This study aims to determine whether there is an impact exercised by enforcement of rules on IAS 36 ‘impairment of assets’. Listed companies from 34 countries applying IFRS were selected. Different ... [more ▼]

This study aims to determine whether there is an impact exercised by enforcement of rules on IAS 36 ‘impairment of assets’. Listed companies from 34 countries applying IFRS were selected. Different regressions were performed on tangible and intangible assets. Four enforcement indexes were used following previous studies. The main results have shown a negative impact exercised by the rule of law index on impairment magnitude on tangibles and intangible assets excluding goodwill. This relation may be due to a decrease in impairments used to manage earnings. [less ▲]

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See detailDuration perception: A Developmental Semiology from 2:6 to 13 Years, General Population versus Atypical, Assessment by Parental Questionnaire
SCHOLL, Jean-Marc ULg; Philippe, Paule; Gérard, Paul ULg et al

Conference (2012, December 20)

Introduction Perception of duration has a major impact on the child’s ability to manage everyday life. Usually, the perception of time is considered in its sequential component. To our knowledge, possible ... [more ▼]

Introduction Perception of duration has a major impact on the child’s ability to manage everyday life. Usually, the perception of time is considered in its sequential component. To our knowledge, possible semiological markers for the capacity to apprehend temporal duration have not yet been explored. There are thus no existing tools either for its evaluation (in everyday life) or for the description of its development during childhood. We are thus largely in the dark about how the perception of duration develops during childhood. Hypothesis 1) It is possible to track perception of duration using semiological markers in everyday life; 2) Children with developmental disorders can be expected to develop difficulties in this domain. Method We designed a questionnaire for parents using a Likert scale. The questionnaire was administered to 2 samples from 2:6 to 13 years: 827 in a general population and 297 in a mixed-psychopathological population recruited from the Mental Health Services network. We carried out a multinomial logistic regression and used percentiles curves (P5,50,95). Results In the general population, perception of duration is gradually acquired and full competence is attained by 9 years. The apprehension of sequential time is achieved by 4 years. In the psychopathological sample, mean perception of temporal duration is delayed by 18 months and significant difficulties remain even at 13 years. The apprehension of sequential time is also delayed: even at 13 years it remains low (at percentile 95). We have found no sex-related differences. Discussion Perception of duration is an important developmental feature which has not been taken into account until now. Semiological markers can be used to differentiate typically developing children from clinical populations as to their respective capacities to perceive temporal duration. [less ▲]

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See detailEUCAST Where are we Today? What’s New? A difficult road in Belgium.
MELIN, Pierrette ULg

Conference (2012, December 19)

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See detailRisk Horizon and Equilibrium Asset Prices
Hübner, Georges ULg; Lejeune, Thomas ULg

Conference (2012, December 18)

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See detailDémarches qualité en agro-alimentaire: retour d'expérience des AOP/IGP.
Sindic, Marianne ULg

Conference (2012, December 18)

Detailed reference viewed: 10 (1 ULg)
See detailLe témoignage audiovisuel à l'ère des images digitales
Van Cauwenberge, Geneviève ULg

Conference (2012, December 14)

Detailed reference viewed: 43 (6 ULg)
See detailReprogramming of replication origin firing and checkpoint adaptation in adult T cell leukemia
Barez, Pierre-Yves ULg; Carpentier, Alexandre ULg; Willems, Luc ULg

Conference (2012, December 14)

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the ... [more ▼]

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the adult T-cell leukemia (ATL) and a neurodegenerative disorder called HAM/TSP (Human associated myelopathy/ Tropical spastic paraparesis). A key parameter of HTLV-1 pathogenesis is faster replication of provirus-carrying lymphocytes allowing clonal expansion of infected cell populations. The virally-encoded Tax oncoprotein plays an essential role in this process by interacting with DNA replication origins and accelerating S phase progression. By reprogramming the timing of origin firing, Tax also creates a replicative stress leading to DNA double strand breaks. This mechanism further triggers the DNA damage response (DDR) that induces cell cycle arrest and initiates either apoptosis or senescence. However, HTLV-1 infected cells have developed strategies to interfere with the DDR and are adapted to checkpoint control. These cells are thus able to proliferate despite occurrence of DNA damage. Based on these observations, we now propose a novel therapeutic approach based on the principle of synthetic lethality. [less ▲]

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See detailRéformes et innovations pédagogiques récentes dans le domaine de l'enseignement "traditionnel" des langues étrangères en Fédération Wallonie-Bruxelles
Simons, Germain ULg

Conference (2012, December 14)

Cette communication retrace d'abord la réforme de l'approche par compétences en langues modernes dans la Fédération Wallonie-Bruxelles. Ensuite, elle décrit et commente quelques innovations pédagogiques ... [more ▼]

Cette communication retrace d'abord la réforme de l'approche par compétences en langues modernes dans la Fédération Wallonie-Bruxelles. Ensuite, elle décrit et commente quelques innovations pédagogiques qui ont été développées dans ce domaine par le service de didactique des langues modernes de l'Université de Liège. [less ▲]

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See detailIntroduction
Henneau, Marie-Elisabeth ULg

Conference (2012, December 13)

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See detailEvaluation des fonctions visuo-perceptives et visuo-spatiales chez les enfants IMC
Schmetz, Emilie ULg; Detraux, Jean-Jacques ULg; Barisnikov, Koviljka

Conference (2012, December 13)

Detailed reference viewed: 124 (21 ULg)
See detailLes langues, encore et toujours !
Defays, Jean-Marc ULg

Conference (2012, December 12)

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See detailCritique de la Kulturkritik : le déclin d’O. Spengler
Zincq, Aurélien ULg

Conference (2012, December 12)

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See detailAteliers "L'activité un prisme multifacettes": L'institution, fin de la vie active ?
Adam, Stéphane ULg

Conference (2012, December 11)

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See detailUne sociologie de la création sans créationnisme
Saint-Amand, Denis ULg

Conference (2012, December 11)

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See detailQuel sens donner à l’activité et quel type d’activité pour nos aînés ?
Adam, Stéphane ULg

Conference (2012, December 11)

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See detailInnovative Surface Plasmon Resonance biosensing architectures
Desfours, Caroline; Piron, Pierre ULg; Habraken, Serge ULg et al

Conference (2012, December 11)

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological ... [more ▼]

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological molecules with a two-wavelength sensor and a SPR Coupler-Disperser spectroscopic sensor. [less ▲]

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See detailEffects of tributyltin (TBT) and triphenyltin (TPT) on the reproduction of the freshwater snail Lymnaea stagnalis
Lagadic, Laurent; Giusti, Arnaud ULg; Barsi, Alpar et al

Conference (2012, December 10)

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See detailPolarization Holography with liquid crystals polymers and applications
Piron, Pierre ULg; Blain, Pascal ULg; Habraken, Serge ULg et al

Conference (2012, December 10)

Liquid Crystals Polymers are birefringent molecules locally orientable. By recording the polarization pattern due to the overlap of differently polarized beams on LCP, space-variant retarders are realized ... [more ▼]

Liquid Crystals Polymers are birefringent molecules locally orientable. By recording the polarization pattern due to the overlap of differently polarized beams on LCP, space-variant retarders are realized. We present two applications polarization holography and coronagraphy [less ▲]

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See detailArthrose et hernie discale lombaire : bilan neurophysiologique
WANG, François-Charles ULg

Conference (2012, December 08)

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See detailDynamique du Karst dans le synclinal de Sprimont de 1898 à 2012
Peeters, Alexandre ULg; Ek, Camille ULg; Labarbe, Philippe et al

Conference (2012, December 08)

1. Une prospection dans le synclinal de Sprimont en 1898 C’est dans un synclinal calcaire de 12 km de long et 1,2 km de large que se situe Sprimont. Le synclinal, qui s’allonge d’est en ouest, est coupé ... [more ▼]

1. Une prospection dans le synclinal de Sprimont en 1898 C’est dans un synclinal calcaire de 12 km de long et 1,2 km de large que se situe Sprimont. Le synclinal, qui s’allonge d’est en ouest, est coupé en deux par la vallée de l’Ourthe. Le présent travail concerne la partie orientale de ce pli. Vers 1898, E. Van den Broeck, E. Martel et E. Rahir parcouraient ce synclinal et cartographiaient ses phénomènes karstiques (Van den Broeck, Martel & Rahir, 1910, vol. ll). 2. Révisions de la cartographie de 1971 à 2000 Raymond Michel entreprit en 1970-71 une révision de la cartographie et constata que beaucoup de pertes s’étaient déplacées, presque toutes vers l’amont, et sur une distance moyenne de 270 m ! Des levés ultérieurs par divers géographes confirmèrent l’extrème mobilité des pertes du vallon et furent consignées dans des cartographies de la CWEPSS et de la DGATLP. À ces mises à jour participèrent notamment D. Closson, A. Jaspar, V. Mousny, M. Salmon, J.-C. Schyns et A. Peeters. 3. Un nouveau levé en 2012 Une nouvelle révision fut entreprise en 2012 par deux équipes qui passèrent chacune trois journées pleines sur le terrain. La prospection s’appuya sur des photos aériennes et les phénomènes furent « géolocalisés » à l’aide d’un petit GPS de terrain (précision env. 10 m). Les pertes karstiques se déplacent au fil du temps, et avec parfois une spectaculaire rapidité. Par exemple, la perte du champ de maïs, au bord de la route N 678 (de Sprimont à Chanxhe) a été localisée en 1995 à 300 m en amont de sa localisation en 1971 ; en 1971, elle était déjà à 350 m en amont de sa situation en 1898. Et en 1999, un autre déplacement de la même perte avait provoqué un effondrement de la route N 678. 4. Conclusions Les phénomènes karstiques du synclinal de Sprimont présentent une dynamique fort active et, dans certains cas, dangereuse pour les travaux des hommes. Les déplacements des points d'enfouissement peuvent poser des problèmes de stabilité des bâtiments et des routes, canalisations, etc., mais aussi des problèmes de pollution. C'est pourquoi il est important de suivre attentivement l'évolution de l'hydrologie karstique. Ceci explique les décisions du Service public de Wallonie de mettre périodiquement à jour la cartographie des phénomènes, et de réglementer les implantations de constructions dans les zones karstiques. [less ▲]

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See detailNon-destructive measurement of volume magnetic properties of large, bulk superconductors
Vanderbemden, Philippe ULg; Dennis, T.; Shi, Y. H. et al

Conference (2012, December 07)

The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in ... [more ▼]

The development of large, single grain bulk superconductors by melt processing techniques has generated a need to characterize samples magnetically over large dimensions, exceeding typically 20 mm in diameter. The usual magnetic characterization gives relies on miniature Hall probe mapping and gives information about the field distribution above the sample surface. If volume properties are required (e.g. magnetization hysteresis loops), the sample needs to be cut in smaller pieces, since the DC magnetic characterization systems for measurements at cryogenic temperatures generally accommodate samples of relatively small size (typically < 5-10 mm diameter). In this work we describe how the hysteresis B(H) loops of large bulk superconducting samples exceeding 10 mm diameter can be determined using home-made sensing coils, either in liquid nitrogen or within the experimental chamber of a Quantum Design Physical Property Measurement System (PPMS). Magnetic properties are measured and compared to those given by several Hall probes attached to both faces of sample. The system is used successfully to measure the DC hysteresis loops of entire (RE)BCO bulk superconducting domains. A careful data acquisition and numerical integration of pick-up coil voltage enables the sweep rate of the magnetic field to be varied from 0.5 to 10 mT/s while keeping an excellent signal/noise ratio. A simple model based on demagnetizing field approach is used to emphasize how the hysteresis loops determined by this technique differ from “true” magnetization loops derived from classical magnetic moment measurements (e.g. SQUID or VSM). These differences are supported with numerical modelling of the average magnetization of the bulk sample using the Brandt method. [less ▲]

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See detailYBa2Cu3O7-x thick films on silver tubes for magnetic shielding applications
Namburi, Devendra Kumar ULg; Closset, Raphaël ULg; Fagnard, Jean-François ULg et al

Conference (2012, December 07)

YBa2Cu3O7-x (YBCO) thick films are investigated for magnetic shielding applications at low frequencies (< 1 kHz). This requires deposition of YBCO on curved substrates such as tubes, half-tubes or even ... [more ▼]

YBa2Cu3O7-x (YBCO) thick films are investigated for magnetic shielding applications at low frequencies (< 1 kHz). This requires deposition of YBCO on curved substrates such as tubes, half-tubes or even more complex shapes. Electrophoretic Deposition (EPD) is an efficient method to achieve this goal: positively-charged YBCO particles suspended in a non aqueous medium drift towards the substrate, used as negative electrode for the application of the electric field. A crucial point is then to optimize the heat treatment of the as-deposited layers in order to achieve suitable superconducting properties. In the present work, we have developed a new suspension formulation in butanol, using a suitable surfactant to stabilize the suspension of YBCO powder (grain size < 2 µm). The EPD parameters (deposition voltage, deposition time, number of layers,...) have been selected to provide uniform layers of YBCO on silver substrates of various shapes. In the proposed communication, we shall discuss in detail the optimization of the heat treatments to achieve densification, peritectic recombination and oxygenation of the YBCO thick films deposited on silver. Scanning electron microscopy coupled with energy dispersive analysis was extensively used to characterize the (i) density / porosity, (ii) presence of macro-cracks, (iii) thickness uniformity, (iv) secondary phase content. We shall then present the characterization of the superconducting properties of the best films. Typically, a uniformly coated 55μm-thick YBCO film on a curved Ag substrate shows a magnetic Tc onset at 92.2 K and sharp resistive transition (< 1K). [less ▲]

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See detailPiezocision-assisted orthodontic treatment in adult patient: A case report
CHARAVET, Carole ULg; LAMBERT, France ULg; LECLOUX, Geoffrey ULg et al

Conference (2012, December 07)

The duration of orthodontic treatments in adult patient remains a barrier for some patients. The recent scientific reports describing piezocision technique involving minimally invasive corticotomies, seem ... [more ▼]

The duration of orthodontic treatments in adult patient remains a barrier for some patients. The recent scientific reports describing piezocision technique involving minimally invasive corticotomies, seem to be of interest for these particular cases. The present communication describes the clinical case of a 20-year-old patient presenting a class I bilateral, an overcrowding of front areas with the superior canine in mesio-infraclusion and a deviated lower median line. An excellent multidisciplinary approach is mandatory for the planification of such cases. Under local anesthesia, the surgical technique involves vertical minimal incision around the teeth that need to be moved. Trough the minimal incisions, 5mm vertical alveolar osteotomies are performed using ultrasonic surgical device. No suture is necessary. The orthodontic activation is applied 1 week before the surgical procedure and the patient is recalled every 15 days to activate the orthodontic appliance. In this case self-ligating brackets were used to reduce the friction. Post-operative outcomes were painless for the patient and the complete orthodontic procedure took 7 months. The overall treatment appeared to be faster than a conventional orthodontic treatment. However, even if animal studies seem to confirm the clinical feeling described in this case report, further clinical studies including randomized controlled trials are needed to validate this treatment approach. [less ▲]

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See detailLes trois premiers miliards d’années d’évolution de la vie
Javaux, Emmanuelle ULg

Conference (2012, December 07)

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See detailNorovirus: "new" enteropathogen agents
HUYNEN, Pascale ULg

Conference (2012, December 07)

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See detailLe "basileion", les reines et Actium
Veymiers, Richard ULg

Conference (2012, December 07)

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See detailUnderstanding the 3D morphology of the Jovian aurora using Juno-UVS observations: simulations and tomographic reconstruction
Bonfond, Bertrand ULg; Gladstone, Randy

Conference (2012, December 06)

The aurora at Jupiter is a spectacular signature of the many processes taking place in the Jovian magnetosphere, such as magnetic reconnection, large scale electric currents, moon-magnetosphere ... [more ▼]

The aurora at Jupiter is a spectacular signature of the many processes taking place in the Jovian magnetosphere, such as magnetic reconnection, large scale electric currents, moon-magnetosphere interactions, etc. As a consequence, this aurora is extremely complex and dynamic, powered by a variety of phenomena that we have only begun to unravel. The 3D morphology of the aurora can provide a way to untangle the different processes at play. As a polar orbiter, Juno will provide unprecedented global and close-up views of Jupiter’s auroral emissions. As it flies at low altitude over auroral curtains, spots and patches, it will provide views of these features from multiple points, allowing the retrieval of their 3D structure. The ultraviolet spectrograph on board Juno (Juno-UVS) is designed to observe auroral emissions in the 68 to 210 nm range. It is equipped with a scan mirror targeting up to +/-30 degrees off axis of the spacecraft rotation plane. We have built a planning tool to determine which auroral targets of interest, such as a satellite footprint for example, is observable by the instrument at any time during the mission. We have also built a simulation tool that allows us to generate realistic views of the Jovian aurora as observed by Juno-UVS. The purpose of this tool is to 1) fine-tune the selection algorithm to identify the most valuable data in the harsh radiation environment encountered around Jupiter, and 2) serve as a test bed for adapting tomographic algorithms to the Juno-UVS dataset. Tomographic reconstruction will allow estimation of the position and horizontal extent of the auroral regions of interest, as well as their vertical emission structure, which may be used to characterize the energy distribution of the precipitating particles responsible for the features. [less ▲]

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See detailHow the debate on the protection of IDPs could inform the debate on the protection of environmental migrations
Gemenne, François ULg; Brücker, Pauline

Conference (2012, December 06)

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See detailLe partenariat CITET - CWBI : 10 années de collaboration scientifique et transfert technologique sur la valorisation énergétique des biomasses
Hiligsmann, Serge ULg; Sayahi, Lamia; Tangour, Douha et al

Conference (2012, December 05)

Les procédés de biométhanisation sont bien connus de par le monde et applicables à presque toute matière organique, même résiduaire. Ils possèdent des rendements et spécificités qui les rendent ... [more ▼]

Les procédés de biométhanisation sont bien connus de par le monde et applicables à presque toute matière organique, même résiduaire. Ils possèdent des rendements et spécificités qui les rendent intéressants pour des applications à petite comme à grande échelle. Du point de vue technologique, le concept de la biométhanisation, est relativement proche de celui des procédés agro-alimentaires. Ce processus de valorisation des déchets organiques est donc plus facilement intégrable dans un procédé agroalimentaire que les autres procédés de valorisation (gazification, pyrolyse, etc,..). La biométhanisation offre aussi l'avantage de pouvoir s'appliquer à des rejets liquides, semi-solides et solides. Par ailleurs, les procédés agro-alimentaires sont nombreux en Tunisie, leurs rejets peuvent contenir de la matière organique de relativement bonne qualité pour la biométhanisation. Toutefois, les conditions de mise en œuvre de la biométhanisation mais aussi de la cogénération en aval doivent être définies au cas par cas afin de conduire à une valorisation efficace des matières et une utilisation rentable du biogaz produit. Depuis plus de 10 ans, des axes de recherche et développement privilégiés ont été définis par les partenaires du CITET et du CWBI (Université de Liège, Belgique) en vue de promouvoir la valorisation des déchets organiques issus du secteur agro-alimentaire et des déchets ménagers. Les premiers travaux s’étaient focalisés sur l’étude de l’impact environnemental et la modélisation de la production de méthane au sein des centres d'enfouissement technique pour déchets ménagers. Forts de cette expérience et d’une compréhension mutuelle, concrétisées par plusieurs publications internationales, les deux centres ont pu aborder de réels transferts technologiques avec assistance technique et programmes de formation&training sur la biométhanisation des déchets organiques du secteur agro-alimentaire : technologie présentant des avantages importants sur le plan environnemental, économique et énergétique. Les travaux portent sur la caractérisation et la codigestion de matières organiques résiduaires liquides et/ou solides provenant des industries agroalimentaires, abattoirs, marchés, restaurants, épiceries, déchets des ménages, … Ils sont complétés par des stages de formation sur le dimensionnement des installations ; missions à l’étranger ; contacts avec des administrations de contrôle et/ou aide à l’investissement; visites et/ou suivis de bioréacteurs pilotes ou industriels. [less ▲]

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See detailCoronary heart disease: the MONICA-BELLUX Register
JeanJean, Michel; Krzesinski, Jean-Marie ULg; Wunsch, Guillaume

Conference (2012, December 05)

Background : Cardiovascular diseases contribute to 42% of overall mortality in the European Union. Over a third of deaths from CVD are from coronary heart disease and just over a quarter are from ... [more ▼]

Background : Cardiovascular diseases contribute to 42% of overall mortality in the European Union. Over a third of deaths from CVD are from coronary heart disease and just over a quarter are from cerebrovascular disease (stroke). Standardized death rates for heart disease have fallen dramatically in the last 25 years in Western Europe, both for men and for women. Multinational MONItoring of trends and determinants in CArdiovascular disease The MONICA Project : A major source of information on cardiovascular diseases established in the early 1980s under the auspices of WHO, to monitor trends in cardiovascular diseases and to relate these to risk factor changes over a ten year period. There were a total of 37 MONICA Collaborating Centres in 21 countries (including 29 populations in 16 European countries). The ten year data collection was completed in the late 1990s, though several Centres are still active today. Conclusions : CVD registers remain nevertheless an invaluable source for monitoring levels and trends in incidence and case fatality. Trends in incidence rates and in case fatality rates can significantly differ from one another. This situation requires better detection of individuals at risk. The intervention component of the BELLUX register is well-suited for this task. [less ▲]

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See detailDes controverses souterraines et silencieuses ? Les vers de terre (lombricidés), l’agronomie et l’agriculture : d’une « non-histoire » à leur délicate mobilisation dans la conception et l’évaluation de formes contemporaines d’agricultures « durables »
Dannevoye, Bastien ULg

Conference (2012, December 05)

This communication investigates the recent and marginal scientific and agronomic interest in earthworms (or "lumbricids"), which paradoxically accounts for the first animal biomass of the globe. After ... [more ▼]

This communication investigates the recent and marginal scientific and agronomic interest in earthworms (or "lumbricids"), which paradoxically accounts for the first animal biomass of the globe. After giving some historical points of reference about earthworms' quite recent scientific knowledge-building - thanks to soil scientists and biologists' works -, we present the manner in which the earthworms and their agricultural and ecological functions are valued today amongst groups of farmers linked to "conservation agriculture practices". This second part is built on sociological observation and interviews amongst those "conservation farmers", at work as well as communicating on their soil conservation practices (no-till, direct drilling, etc.). By doing that, we aim at describing how the earthworms, conceived as "intermediary objects" and "spokesperson" of the much larger soil biology, allows for those practicians to make strongly hold together production and environmental challenges in the agriculture they're developing... instead of opposing those stakes as it's usually the case. [less ▲]

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See detailDurabilité de lots de bois de peuplier modifié thermiquement
Jourez, Benoît ULg; Verheyen, Cécile

Conference (2012, December 05)

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See detailENMG et expertise
WANG, François-Charles ULg

Conference (2012, December 04)

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See detailLiquidity Shocks and Global Imbalances
Artige, Lionel ULg

Conference (2012, December 04)

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See detailSurvival analysis: finding relevant epistatic SNP pairs using Model- Based Multifactor Dimensionality Reduction
Van Lishout, François ULg; Vens, Céline; Urrea, Victor et al

Conference (2012, December 03)

Analyzing the combined effects of genes (and/or environmental factors) on the development of complex diseases is quite challenging, both from the statistical and computational perspective, even using a ... [more ▼]

Analyzing the combined effects of genes (and/or environmental factors) on the development of complex diseases is quite challenging, both from the statistical and computational perspective, even using a relatively small number of genetic and non-genetic exposures. Several data-mining methods have been proposed for interaction analysis, among them, the Multifactor Dimensionality Reduction Method (MDR). Model-Based Multifactor Dimensionality Reduction (MB-MDR), a relatively new dimensionality reduction technique, is able to unify the best of both nonparametric and parametric worlds, and has proven its utility in a variety of theoretical and practical settings. Until now, MB-MDR software has only accommodated traits that are measured on a binary or interval scale. Time-to-event data could therefore not be analyzed with the MB-MDR methodology. MB-MDR-3.0.0 overcomes this shortcoming of earlier versions. We show the added value of MB-MDR for censored traits by comparing the implemented strategies with more classical methods such as those based on a parametric regression paradigm. The simulation results are supplemented with an application to real-life data. [less ▲]

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See detailLa maladie périnéale chez l'enfant porteur d'une MICI
COIMBRA MARQUES, Carla ULg

Conference (2012, December 03)

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See detailThe social dimension of animal health surveillance system: an interdisciplinary approach of social pressure in the process of disease reporting in Northern Thailand.
Binot, Aurélie; Valeix, Sophie; Kovitvadhi, Attawit et al

Conference (2012, December)

In the framework of the CIRAD REVASIA research program, aimed at the improvement of methods for the evaluation of animal health surveillance systems, a interdisciplinary approach has been designed for ... [more ▼]

In the framework of the CIRAD REVASIA research program, aimed at the improvement of methods for the evaluation of animal health surveillance systems, a interdisciplinary approach has been designed for addressing surveillance‘s social factors at local level. To that purpose, methodological inputs from epidemiology, economics and anthropology have been merged together in order to provide an innovative methodological pathway for the assessment and quantification of these factors at community level. Regarding the onset of the desired interdisciplinary approach, the first step was to bring the researchers into several brainstorming sessions aimed at defining a shared scientific and operational objective for this study. It was decided to settle two field sites in two different political, economical and social contexts: one in Vietnam and one in Thailand. Then, the next step was to bring all the concerned researchers into a common workshop dealing with participatory approaches applied to epidemiology. One of the main outcomes was to allow for the handling by the investigators of basic participatory investigation and visualization tools (mapping, diagrams, proportional piling, etc.) and qualitative data gathering. Then, the two field inquiry’s protocols were designed on the economical process at play in the field of livestock and animal health and the social and socio-­‐political dynamics at the community level. This communication will focus on the Thailand study, showing how an anthropology-­‐based study of the social, economical and political process in the community can highlight behavior rules in the context of animal diseases reporting. Indeed, the decision-­‐making process for reporting or not reporting a disease has been considered beyond the individual, as the result of a body of community influences referring to social factors. Thus, we have gone through a better understanding of (1) the community’s functioning patterns, (2) power relationships at play and social stakeholders’ networks and interactions (economical stakes, land tenure issues, political control etc.). In parallel, we showed some trends for health management practices and knowledge. The outputs of this study were an analysis of the social pressure that the stakeholders are subjected to in the framework of animal health management, a better understanding of the animal health information spreading scheme, and a typology of social stakeholders regarding surveillance. The research process, even if focusing on social and anthropological dynamics at play was interdisciplinary from the very beginning, merging together qualitative participatory investigation methods from sociology and economics, modeling and computer sciences, and epidemiology. Thus, pathways of individual motivation for reporting, based on social types, have been provided in order to highlight behavior rules associated to animal health surveillance systems. [less ▲]

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See detailMartian thermospheric temperatures retrieved from CO2 + SPICAM dayglow measurements
Stiepen, Arnaud ULg; Gérard, Jean-Claude ULg; Bougher, S. et al

Conference (2012, December)

A large dataset of dayside grazing limb CO2+ observations performed by the SPICAM (Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars) instrument on board Mars Express is analyzed ... [more ▼]

A large dataset of dayside grazing limb CO2+ observations performed by the SPICAM (Spectroscopy for Investigation of Characteristics of the Atmosphere of Mars) instrument on board Mars Express is analyzed to retrieve Martian thermospheric temperature, as well as its variation with solar activity, season and latitude. The method permits to retrieve the temperature from the scale height of the CO2+ emission. We also present puzzling features such as limb profiles exhibiting multiple peaks and their characteristics. We furthermore study the behavior of the main emission peak of the CO2+ vertical emission profiles. The CO2+ emission at 289 nm arises from the relaxation of the CO2+* molecule in the B2Σ+ state to the X2Π state. CO2+* molecules are mainly produced in the Martian dayside through photoionisation and photoelectron impact. The CO2+ emission exhibits features that constrain the temperature and density vertical profiles of CO2. Comparisons of retrieved temperatures are made with corresponding simulations from the coupled MGCM-MTGCM. We also use a Monte-Carlo code to model the observed intensity limb profiles. [less ▲]

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See detailParticipatory approaches for evaluating surveillance systems: insights from a training- related study from Vietnam
Antoine-Moussiaux, Nicolas ULg; Vu, M.Q. Giao; Delabouglise, Alexis et al

Conference (2012, December)

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See detailStainless steel in structures in view of sustainability
Rossi, Barbara ULg

Conference (2012, December)

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See detailLight as a modulator of cognitive brain functions
Vandewalle, Gilles ULg

Conference (2012, December)

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See detailLa bone sialoproteine: un facteur clé dans la pathogénie de l'arthrose
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Delcour, Jean-Pierre et al

Conference (2012, December)

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See detailAssociation entre l'hypertrophie du chondrocyte et l'angiogenèse du cartilage dans l'arthrose
Pesesse, Laurence ULg; Sanchez, Christelle ULg; Delcour, Jean-Pierre et al

Conference (2012, December)

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See detailAutomatic X-ray fluorescence scanning mobile system for 2D chemical analysis
Strivay, David ULg; Hocquet, François-Philippe; Dister, Hervé et al

Conference (2012, December)

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See detailMigrations congolaises (RDC) en Belgique et postcolonialismes
Demart, Sarah ULg

Conference (2012, December)

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See detailTHREE-DIMENSIONAL RECONSTRUCTION OF LIQUID PHASES CONFINED IN DISORDERED POROUS MEDIA: AN IN SITU SYNCHROTRON SAS ANALYSIS
Gommes, Cédric ULg; Hermida Merino, Daniel

Conference (2012, December)

We use Synchrotron Small-Angle X-ray Scattering to investigate temperature-induced morphological changes in binary hexane/nitrobenzene solutions confined in the pores of disordered mesoporous solids. The ... [more ▼]

We use Synchrotron Small-Angle X-ray Scattering to investigate temperature-induced morphological changes in binary hexane/nitrobenzene solutions confined in the pores of disordered mesoporous solids. The scattering data is analyzed with a plurigaussian model, which enables us to reconstruct the 3D morphology of the phases with a nanometer resolution. The reconstructions bring to light wetting transitions whereby the morphology of the nitrobenzene passes from a nanometer-thin layer that uniformly covers the solid surface to plugs that locally occlude the pore space. Our analysis enables us to quantitatively analyze the SAS data in terms of changing interface areas and wetting angles. The present contribution offers unprecedented insight into nanometer-scale wetting transitions. It also presents a novel SAS data analysis methodology that is applicable to a host of experimental situations involving disordered mesoporous materials. [less ▲]

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See detailSeasonal change of Lymnaeid snails intermediate host of Fasciola gigantica in North and Central Vietnam
Bui Thi, Dung ULg; Dang Tat, The; Pham Ngoc, Doanh et al

Conference (2012, December)

Objective: The present study was undertaken to investigate the population dynamics of the intermediate hosts of Fasciola gigantica and the levels of infection in the snails. This would allow identifying ... [more ▼]

Objective: The present study was undertaken to investigate the population dynamics of the intermediate hosts of Fasciola gigantica and the levels of infection in the snails. This would allow identifying the most important transmission periods and suggesting optimal snail control for the area. Methods: Lymnaeid snails were monthly collected by hand picking in Ha Noi (Northern Vietnam) during the period from March 2010 to December 2011 and in Binh Dinh province (Central Vietnam) during the period May and September 2012. Collected snails from different sites were identified based on morphology and the partial 16S rDNA sequence and ITS-2 sequence. Snails were examined for the presence of Fasciola larval by the crushing method and confirmation by multiplex PCR analyses with PCR primer for Fasciola gigantica cathepsin L in parallel with the snail rDNA species specific primer. Result: The density of Lymnaeid populations underwent great changes in relation to the geographical locations and seasons. In Central Vietnam, the Lymnaeid populations reached the peak in the dry/rainy season (May) and decreased sharply in rainy/dry season (September). In contrast, in Hanoi, it reached the peaks in 2 periods (February to April and August to November) of rice cultivation or early stage of growing of rice, and greatly deceased when the rice becomes fully developed. Transmission of fascioliasis in Ha Noi were high when rice cultivation is performed, while the permanent transmission can takes place through the year in Binh Dinh with peak transmission during the dry season. [less ▲]

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See detailComplexité k-abélienne du mot de Thue-Morse
Vandomme, Elise ULg

Conference (2012, December)

Soit k un entier. Deux mots u et v de même longueur sont équivalents k-abéliennement s'ils ont le même préfixe (resp. suffixe) de longueur k-1 et si, pour tous les mots x de longueur k, les nombres d ... [more ▼]

Soit k un entier. Deux mots u et v de même longueur sont équivalents k-abéliennement s'ils ont le même préfixe (resp. suffixe) de longueur k-1 et si, pour tous les mots x de longueur k, les nombres d'occurrences de x dans et dans v coïncident. Cette notion a suscité récemment beaucoup d'intérêt (consulter par exemple les travaux de Karhumäki et al.) La complexité k-abélienne d'un mot infini w associe à un entier n le nombre de classes d'équivalence k-abélienne partitionnant l'ensemble des facteurs de longueur n de w. Le mot de Thue-Morse est une suite 2-automatique célèbre et très étudiée. Il est triviallement abéliennement périodique et sa complexité (1-)abélienne ne prend que deux valeurs. Le but de cet exposé est de calculer la complexité 2-abélienne du mot de Thue-Morse à l'aide de matrices. En particulier, nous montrerons que cette complexité n'est pas bornée. De plus, nous conjecturons que cette complexité est 2-regulière au sens d'Allouche et Shallit. [less ▲]

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