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See detailPhysiological response of yeast to process perturbations: A mini-bioreactor approach
Lejeune, Annick ULg; Delvigne, Frank ULg; Thonart, Philippe ULg

in Cerevisia : Belgian Journal of Brewing and Biotechnology (2013), 38(1), 15-19

Large-scale production of yeast (Saccharomyces cerevisiae) is difficult to control, considering the drop of mixing and mass transfer efficiency during scale-up. The drop of hydrodynamic efficiency in ... [more ▼]

Large-scale production of yeast (Saccharomyces cerevisiae) is difficult to control, considering the drop of mixing and mass transfer efficiency during scale-up. The drop of hydrodynamic efficiency in large-scale bioreactors induces the formation of heterogeneities, i.e. mainly substrate and dissolved oxygen in process conditions. These extracellular fluctuations have several impacts at the level of the physiology of microorganisms, from metabolic shift to specific gene expression (stress response). Microbial cell responses to extracellular fluctuations are actually not fully understood. In this work, we propose to reproduce the main extracellular fluctuations at the level of a mini bioreactor platform. These mini-reactors are shake flasks equipped with dissolved oxygen probes. The cultures are realized with different fed-batch control strategies. A scale-down approach has been developed by considering slow release techniques and intermittent feeding, in order to reproduce the glucose and dissolved oxygen fluctuations experienced in large-scale reactors. The mini-reactor has been used to screen the response of several green fluorescent protein (GFP) reporter strains (adh2, tps2, pdc6 and hxt2). The GFP content of cells has been determined by flow cytometry in order to take into account population heterogeneity. In front of these results, the methodology presented in this work can be proposed as a scale-down tool. [less ▲]

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See detailHyperspectral imaging applications in agriculture and agro-food product quality and safety control: A review
Dale, Laura ULg; Thewis, André ULg; Boudry, Christelle ULg et al

in Applied Spectroscopy Reviews (2013), 48(2), 142-159

In this review, various applications of Near Infrared Hyperspectral Imaging (NIR-HSI) in agriculture and in the quality control of agro-food products are presented. NIR-HSI is an emerging technique that ... [more ▼]

In this review, various applications of Near Infrared Hyperspectral Imaging (NIR-HSI) in agriculture and in the quality control of agro-food products are presented. NIR-HSI is an emerging technique that combines classical NIR spectroscopy and imaging techniques in order to simultaneously obtain spectral and spatial information from a field or a sample. The technique is non-destructive, non-polluting, fast and relatively inexpensive per analysis. Currently, its applications in agriculture range from vegetation mapping, crop disease, stress and yield detection to component identification in plants and impurity detection. There is growing interest in HSI for the safety and quality assessment of agro-food products. The applications have been classified from the level of satellite images to the macroscopic, if not, molecular level. [less ▲]

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See detailWarm Spitzer Occultation Photometry of WASP-26b at 3.6{\mu}m and 4.5{\mu}m
Mahtani, D. P.; Maxted, P. F. L.; Anderson, D. R. et al

in Monthly Notices of the Royal Astronomical Society (2013), 432(1), 693-701

We present new warm Spitzer occultation photometry of WASP-26 at 3.6{\mu}m and 4.5{\mu}m along with new transit photometry taken in the g,r and i bands. We report the first detection of the occultation of ... [more ▼]

We present new warm Spitzer occultation photometry of WASP-26 at 3.6{\mu}m and 4.5{\mu}m along with new transit photometry taken in the g,r and i bands. We report the first detection of the occultation of WASP-26b, with occultation depths at 3.6{\mu}m and 4.5{\mu}m of 0.00126 +/- 0.00013 and 0.00149 +/- 0.00016 corresponding to brightness temperatures of 1825+/-80K and 1725+/-89K, respectively. We find that the eccentricity of the orbit is consistent with a circular orbit at the 1{\sigma} level with a 3{\sigma} upper limit of e < 0.04. According to the activity-inversion relation of Knutson et al. (2010), WASP-26b is predicted to host a thermal inversion. The brightness temperatures deduced from the eclipse depths are consistent with an isothermal atmosphere, although it is within the uncertainties that the planet may host a weak thermal inversion. The data are equally well fit by atmospheric models with or without a thermal inversion. We find that variation in activity of solar-like stars does not change enough over the time-scales of months or years to change the interpretation of the Knutson et al. (2010) activity-inversion relation, provided that the measured activity level is averaged over several nights. Further data are required to fully constrain the thermal structure of the atmosphere because the planet lies very close to the boundary between atmospheres with and without a thermal inversion. [less ▲]

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See detailNon-perturbative effect of rotation on dipolar mixed modes in red giant stars
Ouazzani, R.-M.; Goupil, M. J.; Dupret, Marc-Antoine ULg et al

in Astronomy and Astrophysics (2013), 554

Context. The space missions CoRoT and Kepler provide high-quality data that allow us to test the transport of angular momentum in stars by the seismic determination of the internal rotation profile. <BR ... [more ▼]

Context. The space missions CoRoT and Kepler provide high-quality data that allow us to test the transport of angular momentum in stars by the seismic determination of the internal rotation profile. <BR /> Aims: Our aim is to test the validity of seismic diagnostics for red giant rotation that are based on a perturbative method and to investigate the oscillation spectra when the validity does not hold. <BR /> Methods: We use a non-perturbative approach implemented in the ACOR code that accounts for the effect of rotation on pulsations and solves the pulsation eigenproblem directly for dipolar oscillation modes. <BR /> Results: We find that the limit of the perturbation to first order can be expressed in terms of the rotational splitting compared to the frequency separation between consecutive dipolar modes. Above this limit, non-perturbative computations are necessary, but only one term in the spectral expansion of modes is sufficient as long as the core rotation rate remains significantly smaller than the pulsation frequencies. Each family of modes with different azimuthal symmetry, m, has to be considered separately. In particular, in case of rapid core rotation, the density of the spectrum differs significantly from one m-family of modes to another, so that the differences between the period spacings associated with each m-family can constitute a promising guideline toward a proper seismic diagnostic for rotation. [less ▲]

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See detailSolar-like oscillations in distant stars as seen by CoRoT : the special case of HD 42618, a solar sister
Barban, C.; Deheuvels, S.; Goupil, M. J. et al

in Journal of Physics: Conference Series (2013), 440

We report the observations of a main-sequence star, HD 42618 (T[SUB]eff[/SUB] = 5765 K, G3V) by the space telescope CoRoT. This is the closest star to the Sun ever observed by CoRoT in term of its ... [more ▼]

We report the observations of a main-sequence star, HD 42618 (T[SUB]eff[/SUB] = 5765 K, G3V) by the space telescope CoRoT. This is the closest star to the Sun ever observed by CoRoT in term of its fundamental parameters. Using a preliminary version of CoRoT light curves of HD 42618, p modes are detected around 3.2 mHz associated to l = 0, 1 and 2 modes with a large spacing of 142 μHz. Various methods are then used to derive the mass and radius of this star (scaling relations from solar values as well as comparison between theoretical and observationnal frequencies) giving values in the range of (0.80 - 1.02)M[SUB]solar[/SUB] and (0.91 - 1.01)R[SUB]solar[/SUB]. A preliminary analysis of l = 0 and 1 modes allows us also to study the amount of penetrative convection at the base of the convective envelope. [less ▲]

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See detailLet the Country Grow
Maiorano, Diego ULg

in Economic and Political Weekly (2013), XLVIII(22),

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See detailPersistent Organochlorine Pollutants with Endocrine Activity and Blood Steroid Hormone Levels in Middle- Aged Men
Emeville, Elise; Giton, Frank; Giusti, Arnaud ULg et al

in PLoS ONE (2013), 8(6), 66460

Abstract Background: Studies relating long-term exposure to persistent organochlorine pollutants (POPs) with endocrine activities (endocrine disrupting chemicals) on circulating levels of steroid hormones ... [more ▼]

Abstract Background: Studies relating long-term exposure to persistent organochlorine pollutants (POPs) with endocrine activities (endocrine disrupting chemicals) on circulating levels of steroid hormones have been limited to a small number of hormones and reported conflicting results. Objective: We examined the relationship between serum concentrations of dehydroepiandrosterone, dehydroepiandrosterone sulphate, androstenedione, androstenediol, testosterone, free and bioavailable testosterone, dihydrotestosterone, estrone, estrone sulphate, estradiol, sex-hormone binding globulin, follicle-stimulating hormone, and luteinizing hormone as a function of level of exposure to three POPs known to interfere with hormone-regulated processes in different way: dichlorodiphenyl dichloroethene (DDE), polychlorinated biphenyl (PCB) congener 153, and chlordecone. Methods: We collected fasting, morning serum samples from 277 healthy, non obese, middle-aged men from the French West Indies. Steroid hormones were determined by gas chromatography-mass spectrometry, except for dehydroepiandrosterone sulphate, which was determined by immunological assay, as were the concentrations of sex-hormone binding globulin, follicle-stimulating hormone and luteinizing hormone. Associations were assessed by multiple linear regression analysis, controlling for confounding factors, in a backward elimination procedure, in multiple bootstrap samples. Results: DDE exposure was negatively associated to dihydrotestosterone level and positively associated to luteinizing hormone level. PCB 153 was positively associated to androstenedione and estrone levels. No association was found for chlordecone. Conclusions: These results suggested that the endocrine response pattern, estimated by determining blood levels of steroid hormones, varies depending on the POPs studied, possibly reflecting differences in the modes of action generally attributed to these compounds. It remains to be investigated whether this response pattern is predictive of the subsequent occurrence of disease. [less ▲]

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See detailPearls and pitfalls: Electrophysiology for primary headaches
MAGIS, Delphine ULg; Vigano, Alessandro; SAVA, Simona Liliana ULg et al

in Cephalalgia : An International Journal of Headache (2013)

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See detailLe gaspillage de l'espace wallon. Comment en sommes-nous arrivés-là et pourquoi persistons-nous ?
Halleux, Jean-Marie ULg

in Cahiers Nouveaux (Les) (2013), 85

La Belgique et la Wallonie se caractérisent par une très importante consommation d'espace pour l'urbanisation. Dans cet article, nous précisons pourquoi et comment une telle consommation de la ressource ... [more ▼]

La Belgique et la Wallonie se caractérisent par une très importante consommation d'espace pour l'urbanisation. Dans cet article, nous précisons pourquoi et comment une telle consommation de la ressource foncière est indissociable d'un aménagement permissif et de l'inexistence d'une politique foncière digne de ce nom. [less ▲]

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See detailZones d'activité économique en Wallonie : quelles retombées fiscales pour les communes ?
Xhignesse, Guillaume ULg; Bianchet, Bruno ULg; Bourgeois, Marc ULg et al

in Revue de Fiscalité Régionale et Locale (2013), 2

Les zones d'activité économique constituent, en Wallonie, un des leviers majeurs à disposition du Gouvernement pour favoriser le développement économique. Leur implantation suscite toutefois de nombreux ... [more ▼]

Les zones d'activité économique constituent, en Wallonie, un des leviers majeurs à disposition du Gouvernement pour favoriser le développement économique. Leur implantation suscite toutefois de nombreux débats au sein des élus locaux. Ces débats sont notamment alimentés par la perception que ces zones génèrent des recettes fiscales très limitées pour les communes. Cette contribution propose une analyse et une mesure des facteurs qui influencent ces recettes et, par conséquent, les choix locaux en matière d'affectation de l'espace. [less ▲]

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See detailImpaired automatic and unconscious motor processes in Parkinson's disease
D'Ostilio, Kevin ULg; CREMERS, Julien ULg; DELVAUX, Valérie ULg et al

in Scientific Reports (2013)

While it is increasingly recognized that voluntary movements are produced by an interaction between conscious and unconscious processes, the role of the latter in Parkinson’s disease has received little ... [more ▼]

While it is increasingly recognized that voluntary movements are produced by an interaction between conscious and unconscious processes, the role of the latter in Parkinson’s disease has received little attention to date. Here, we administered a subliminal masked prime task to 15 Parkinson’s disease patients and 15 age-matched healthy elderly subjects. Compatibility effects were examined by manipulating the direction of the arrows and the interstimuli interval. Analysis of the positive compatibility effect revealed performance differences between the most and the least affected hand in Parkinson’s disease patients. Additionally, patients did not show the same tendency toward a negative compatibility effect as compared to elderly controls. These novel findings provide evidence supporting the role of basal ganglia circuits in controlling the balance between automatic motor response facilitation and inhibition. [less ▲]

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See detailPrincipes de base de la télédétection et ses potentialités comme outil de caractérisation de la ressource forestière – II. LiDAR aérien
Bonnet, Stéphanie ULg; Toromanoff, François ULg; Bauwens, Sébastien ULg et al

in Forêt Wallonne (2013), (124), 28-41

La télédétection a déjà démontré, au travers de nombreuses études, son potentiel de caractérisation de la ressource forestière. En particulier, le développement du LiDAR aérien a ouvert la voie à de ... [more ▼]

La télédétection a déjà démontré, au travers de nombreuses études, son potentiel de caractérisation de la ressource forestière. En particulier, le développement du LiDAR aérien a ouvert la voie à de nouvelles perspectives. Cette technologie offre une vision tridimensionnelle de la forêt qui permet de récolter à large échelle des informations à l'intérieur même des peuplements. Après avoir présenté les grands principes de télédétection dans un premier article (Forêt Wallonne n°114), ce second volet présente quelques concepts de base pour se familiariser avec le LiDAR et illustre son intérêt pour la gestion des forêts et des milieux naturels aux travers de travaux de recherche menés sur une zone pilote constituée par le bassin versant de la Houille dans la région de Gedinne en Province de Namur. [less ▲]

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See detailNăng suất sinh sản của các tổ hợp lai giữa lợn nái F1(Landrace x Yorkshire) với đực giống (Piétrain x Duroc) có thành phần di truyền Piétrain kháng stress khác nhau
Dao, Pham Thi; Thang, Nguyen Van; Do Duc, Luc ULg et al

in Journal of Animal Husbandry and Technics (2013), (6), 2-9

This study was carried out at 3 pig farm in Hai Duong and Hung Yen provinces from March 2012 to February 2013 to evaluate the reproduction performance of F1(Landrace x Yorkshire) - LY sows mated to three ... [more ▼]

This study was carried out at 3 pig farm in Hai Duong and Hung Yen provinces from March 2012 to February 2013 to evaluate the reproduction performance of F1(Landrace x Yorkshire) - LY sows mated to three different crossbred boars such as Duroc x ( Piétrain x Duroc) - Pi25, Piétrain x Durroc - Pi50 and Piétrain x (Piétrain x Duroc) - Pi75. Results showed that the reproduction performance of three crossbred boars was high: 10.76, 10.50 and 10.97 pigs born alive per litter; 9.90, 9.91 and 10.04 respectively for Pi25, Pi50 and Pi75. Piglet body weights at birth were 1.36, 1.58 and 1.54kg and body weight of pigs at weaning were 6.39, 6.59 and 6.41kg respectively for Pi25 x LY, Pi50 x LY and Pi75 x LY. Pi50 and Pi75 could be used as terminal sires mated to LY to obtain better reproduction performance. [less ▲]

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See detailGeen smart city zonder integraal 3D-model
Billen, Roland ULg

in GeoPlatform (2013), 2(8), 14-16

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See detailLe rapport et la réduction des donations par voie d'assurance-vie
Moreau, Pierre ULg

in Recueil Général de l'Enregistrement et du Notariat [= RGEN] (2013), (6), 231-240

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See detailAcquired auditory agnosia in childhood and normal sleep electroencephalography subsequently diagnosed as Landau-Kleffner syndrome: report of three cases.
VAN Bogaert, Patrick; King, Mary D.; Paquier, Philippe et al

in Developmental Medicine & Child Neurology (2013), 55(6), 575-9

Aim We report three cases of Landau-Kleffner syndrome (LKS) in children (two females, one male) in whom diagnosis was delayed because the sleep electroencephalography (EEG) was initially normal. Method ... [more ▼]

Aim We report three cases of Landau-Kleffner syndrome (LKS) in children (two females, one male) in whom diagnosis was delayed because the sleep electroencephalography (EEG) was initially normal. Method Case histories including EEG, positron emission tomography findings, and long-term outcome were reviewed. Results Auditory agnosia occurred between the age of 2 years and 3 years 6 months, after a period of normal language development. Initial awake and sleep EEG, recorded weeks to months after the onset of language regression, during a nap period in two cases and during a full night of sleep in the third case, was normal. Repeat EEG between 2 months and 2 years later showed epileptiform discharges during wakefulness and strongly activated by sleep, with a pattern of continuous spike-waves during slow-wave sleep in two patients. Patients were diagnosed with LKS and treated with various antiepileptic regimens, including corticosteroids. One patient in whom EEG became normal on hydrocortisone is making significant recovery. The other two patients did not exhibit a sustained response to treatment and remained severely impaired. Interpretation Sleep EEG may be normal in the early phase of acquired auditory agnosia. EEG should be repeated frequently in individuals in whom a firm clinical diagnosis is made to facilitate early treatment. [less ▲]

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See detailContinuous odour measurement from fattening pig units
Romain, Anne-Claude ULg; Nicolas, Jacques ULg; Cobut, pierre et al

in Atmospheric Environment (2013)

A study in experimental slatted-system fattening pig units was conducted with the aim of estimating the odour emission factor (in ou/s.pig), which can subsequently be used in dispersion models to assess ... [more ▼]

A study in experimental slatted-system fattening pig units was conducted with the aim of estimating the odour emission factor (in ou/s.pig), which can subsequently be used in dispersion models to assess the odour annoyance zone. Dynamic olfactometry measurements carried out at different development stages of pigs showed a logical trend of the mean predicted odour emission factor with the pig weight. However, the variation within the same weight class was much larger than variation between classes. Possible causes of such variation were identified as the evolution of ventilation rate during the day and the circadian rhythm of pig. To be able to monitor continuously the daily variation of the odour, an electronic nose was used with suitable regression model calibrated against olfactometric measurements. After appropriate validation check, the electronic nose proved to be convenient, as a complementary tool to dynamic olfactometry, to record the daily variation of the odour emission factor in the pig barn. It was demonstrated that, in the controlled conditions of the experimental pens, the daily variation of the odour emission rate could be mainly attributed to the sole influence of the circadian rhythm of pig. As a consequence, determining a representative odour emission factor in a real case cannot be based on a snapshot odour sampling. [less ▲]

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See detailIntact procedural motor sequence learning in developmental coordination disorder
Lejeune, Caroline ULg; Catale, Corinne ULg; Willems, Sylvie ULg et al

in Research in Developmental Disabilities (2013), 34(6), 1974-1981

The purpose of the present study was to explore the possibility of a procedural learning deficit among children with developmental coordination disorder (DCD). We tested 34 children aged 6–12 years with ... [more ▼]

The purpose of the present study was to explore the possibility of a procedural learning deficit among children with developmental coordination disorder (DCD). We tested 34 children aged 6–12 years with and without DCD using the serial reaction time task, in which the standard keyboard was replaced by a touch screen in order to minimize the impact of perceptuomotor coordination difficulties that characterize this disorder. The results showed that children with DCD succeed as well as control children at the procedural sequence learning task. These findings challenge the hypothesis that a procedural learning impairment underlies the difficulties of DCD children in acquiring and automatizing daily activities. We suggest that the previously reported impairment of children with DCD on the serial reaction time task is not due to a sequence learning deficit per se, but rather due to methodological factors such as the response mode used in these studies. [less ▲]

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See detailThe Role of Legitimacy in Social Enterprise-Corporate Collaboration
Huybrechts, Benjamin ULg; Nicholls, Alex

in Social Enterprise Journal (2013), 9(2), 130-146

This research examines the collaborations between social enterprises (SEs) and corporations, which have been flourishing over the last decades. These collaborations differ from both philanthropic ... [more ▼]

This research examines the collaborations between social enterprises (SEs) and corporations, which have been flourishing over the last decades. These collaborations differ from both philanthropic partnerships and classical business alliances. Unlike the former, these collaborations are centred on the joint development of a product or service which represents a business opportunity for both the SE and the corporation. Unlike the latter, these collaborations contribute at least partially to the pursuit of a social mission, which is the main driver of the SE and may motivate the corporation as well. While most work on cross-sector collaboration examines the advantages of collaboration for the different types of organizations, we take a slightly different perspective, using institutional theory to look at the implications of collaboration in terms of organizational legitimacy. As organizational legitimacy is contingent on a given institutional field in which a number of stakeholders provide legitimacy based on patterns of appropriateness, questions emerge about what happens when organizations from different fields embodying different logics and responding to various legitimating stakeholders collaborate. Surprisingly, while institutional theory has become a widely used theoretical framework, it has only little been applied to examine interorganizational collaboration, let alone cross-sector collaboration between social enterprises and corporations. This research aims to fill this gap in order to enrich both the understanding of interorganizational collaboration and its implications in terms of organizational legitimacy, and the knowledge and practice of cross-sector collaboration. [less ▲]

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See detailOperational warning for Septoria leaf blotch and leaf rust in winter wheat: Importance of fungicide dosage, formulation, and spray time
El Jarroudi, Moussa ULg; Kouadio, Louis; Beyer, Marco et al

in Phytopathology (2013), 103

Field experiments were conducted in 2010 to investigate the effect of fungicide commercial formulation, timing and dosages on the severity of these two diseases in winter wheat in Luxembourg. Different ... [more ▼]

Field experiments were conducted in 2010 to investigate the effect of fungicide commercial formulation, timing and dosages on the severity of these two diseases in winter wheat in Luxembourg. Different types of fungicides and fungicide combinations containing active ingredients such as triazoles and strobilurins were used in field trials including susceptible cultivars to Septoria leaf blotch (SLB, caused by Septoria tritici) and wheat leaf rust (WLR, caused by Puccinia triticina). The three formulations of fungicides tested were: (i) a mix of triazole and amine (Prothioconazole 250 g/l + Spiroxamine 500 g/l) associated with chlorothalonil 500 g/l, (ii) sole strobilurin (Azoxystrobine 250 g/l), and (iii) a mix of strobilurin and triazole (Epoxiconazole 125 g/l; Azoxystrobine 250 g/l). The optimum time of fungicide spray was assessed through the mechanistic model PROCULTURE and a stochastic model based on night favourable weather conditions conducive to WLR development. The results showed that for plots treated with fungicide formulation containing either a triazole or a strobilurin, the grain yield earned was not significantly different from the untreated plots (P > 0.05). Whereas single fungicide treatment involving a mixture of triazole and strobilurin at the optimum time gave an earning (on average 7 dt ha-1) compare to the control and a yield similar to that obtained with the double or triple fungicide treatments. [less ▲]

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See detailScopus et WorldCat : regards croisés sur deux outils bibliographiques
Mottet, Philippe ULg; Greco, Ninfa ULg

in Cahiers de la Documentation = Bladen voor Documentatie (2013), 67(2), 41-51

Les outils de recherche bibliographique, imprimés puis électroniques, ont longtemps été le domaine réservé de sociétés commerciales qui proposaient des produits clé sur porte, multidisciplinaires ou ... [more ▼]

Les outils de recherche bibliographique, imprimés puis électroniques, ont longtemps été le domaine réservé de sociétés commerciales qui proposaient des produits clé sur porte, multidisciplinaires ou spécialisés. Ils restent incontournables pour la plupart des institutions scientifiques par la qualité de leur contenu, la précision de leurs systèmes d’interrogation et la facilité de traiter et de sauvegarder les résultats des recherches réalisées. Ce monopole a cependant été remis en question par l’accessibilité, toujours plus grande, et gratuite, de l’information sur Internet. Parmi les nombreux outils bibliographiques actuellement disponibles, nous avons choisi de comparer un système commercial traditionnel, utilisé dans les universités de la Communauté française de Belgique : Scopus, et une solution issue du monde des bibliothèques, consultable gratuitement, du moins partiellement, sur Internet : WorldCat. La comparaison des deux produits a donné lieu à des résultats parfois inattendus. [less ▲]

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See detailComposition and orbits of language operations: finiteness and upper bounds
Charlier, Emilie ULg; Domaratzki, Michael; Harju, Tero et al

in International Journal of Computer Mathematics (2013), 90(6), 1171-1196

We consider a set of eight natural operations on formal languages (Kleene closure, positive closure, complement, prefix, suffix, factor, subword, and reversal), and compositions of them. If x and y are ... [more ▼]

We consider a set of eight natural operations on formal languages (Kleene closure, positive closure, complement, prefix, suffix, factor, subword, and reversal), and compositions of them. If x and y are compositions, we say x is equivalent to y if they have the same effect on all languages L. We prove that the number of equivalence classes of these eight operations is finite. This implies that the orbit of any language L under the elements of the monoid is finite and bounded, independently of L. This generalizes previous results about complement, Kleene closure, and positive closure. We also estimate the number of distinct languages generated by various subsets of these operations. [less ▲]

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See detailInstitutionnel: au-delà des partis et des clichés. Entretien
Dodeigne, Jérémy ULg; Reuchamps, Min; Sinardet, Dave

in Revue Nouvelle (2013), 6

Entretien réalisé par Donat Carlier et Benoît Lechat à propos de l'article "L’avenir du fédéralisme en Belgique. Visions des parlementaires fédéraux et régionaux avant l’accord sur la sixième réforme de ... [more ▼]

Entretien réalisé par Donat Carlier et Benoît Lechat à propos de l'article "L’avenir du fédéralisme en Belgique. Visions des parlementaires fédéraux et régionaux avant l’accord sur la sixième réforme de l’État" [less ▲]

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See detailPour un bon usage de "L'Homme révolté". Franco Fortini lecteur de Camus
Cavazzini, Andrea ULg

in Année Sartrienne (L') : Bulletin du Groupe d'Etudes Sartriennes (2013)

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See detailIdentification of methylenecyclopropyl acetic acid in serum of European horses with atypical myopathy
Votion, Dominique ULg; van Galen, G; Sweetan et al

in Equine Veterinary Journal (2013)

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See detailSubstrate Mode-Integrated SPR Sensor
Lenaerts, Cedric ULg; Vilcot, Jean-Pierre; Hastanin, Juriy ULg et al

in Plasmonics (2013), 8(2), 1203-1208

We present the design, implementation and characterisation of an integrated surface plasmon resonance (SPR) biosensor chip involving diffractive optical coupling elements avoiding the need of prism ... [more ▼]

We present the design, implementation and characterisation of an integrated surface plasmon resonance (SPR) biosensor chip involving diffractive optical coupling elements avoiding the need of prism coupling. The integrated sensor chip uses the angular interrogation principle and includes two diffraction gratings and the SPR sensing zone. The theoretical design is presented as well as the fabrication process. Experimental results (response of a reference water droplet and phosphate-buffered saline/water kinetic) are presented and compared with those obtained with the classical Kretschmann prism coupling setup. We believe that this prism-free architecture is perfectly suitable for low-cost and reproducible SPR biochemical sensor chips since the sensing zone can be functionalised as any other one [less ▲]

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See detailLe vote à distance des migrants mexicains : quel impact pour la diaspora dans le champ politique du pays d'origine?
Lafleur, Jean-Michel ULg

in Politique Américaine (2013), 21

Dans cet article, je propose d’envisager en trois étapes les conséquences du droit de vote de la diaspora mexicaine au-delà de la réalité numérique limitée des deux dernières élections présidentielles ... [more ▼]

Dans cet article, je propose d’envisager en trois étapes les conséquences du droit de vote de la diaspora mexicaine au-delà de la réalité numérique limitée des deux dernières élections présidentielles. D’abord, j’aborde l’évolution du débat sur le droit de vote à distance sur la scène politique mexicaine et mets en lumière les craintes de la classe politique mexicaine à l’égard du poids politique de sa diaspora (particulièrement durant le régime du PRI avant 2000). Je montre également comment le processus de transition démocratique entamé à la fin du 20ème siècle in- fluence les relations entre État et diaspora et ouvre la voie à la réforme sur le droit de vote à distance. Ensuite, après avoir brièvement présenté les principales données concernant la participation politique de la diaspora en 2006 et 2012, j’examine deux hypothèses pouvant expliquer la faible mobilisation des Mexicains de l’étranger. D’une part, la législation sur le droit de vote à l’extérieur et sa mise en œuvre par les autorités électorales sont des barrières installées délibérément afin de limiter l’impact électoral d’une population sur laquelle les partis politiques ont peu de contrôle. D’autre part, j’émets l’hypothèse, grâce à différentes enquêtes d’opinion et à l’analyse du rôle des associations de migrants dans le processus d’enregistrement des électeurs, que l’intérêt à participer aux élections mexicaines n’est partagé que par une partie de la communauté émigrée. Cet article se termine par une discussion sur les évolutions du régime mexicain de vote à l’extérieur aux niveaux fédéral et régional. Ce faisant, je conclus que le droit de vote attribué à la diaspora mexicaine remplit une fonction principalement symbolique pour les autorités mexicaines en donnant l’illusion aux émigrés mexicains qu’ils continuent à faire partie de la communauté politique malgré leur absence du territoire national. [less ▲]

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See detailDes boucliers contre l’oubli. Visite au musée et réappropriation du patrimoine zapara
Bilhaut, Anne-Gaël ULg

in PROA: Revista de Antropologia e Arte (2013), 1(4),

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See detailStyle de vie de consommateurs de drogue conduisant à la délinquance
Born, Michel ULg; Pirenne, Chantal; Schmits, Emilie ULg et al

in Revue Internationale de Criminologie et de Police Technique et Scientifique [= RICPTS] (2013), LXVI

Par des entretiens qualitatifs qui ont pu être menés dans une dizaine de communes belges auprès de personnes ayant accepté de se prêter à un entretien, nous pouvons examiner le lien entre le style de vie ... [more ▼]

Par des entretiens qualitatifs qui ont pu être menés dans une dizaine de communes belges auprès de personnes ayant accepté de se prêter à un entretien, nous pouvons examiner le lien entre le style de vie, la consommation de drogue et la délinquance autorévélée. Par la méthode boule de neige auprès d’usagers de centres ambulatoires d’aide aux toxicomanes et par la méthode de rencontres aléatoires dans des espaces publics, un échantillon de 106 personnes reconnaissant avoir été ou être encore consommateur de drogues illicites a été rencontré. Par l’analyse qualitative, il sera possible de comprendre comment la consommation et la délinquance s’imbriquent chez certaines personnes et structurent leur temps et leur mode de vie. Contrairement aux idées reçues que les consommateurs deviennent délinquants, se marginalisent et aggravent leur toxicomanie, les entretiens permettent de mieux comprendre toutes les nuances individuelles des styles de vie et en particulier le maintien sur une période de vie assez prolongée, de consommations modérées ne conduisant pas à l’exclusion sociale. [less ▲]

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See detailLa PAC-Post 2013 : le cas de l'intégration de l'environnement
Habran, Maxime ULg

in Revue Agronomie environnement & sociétés (2013), volume 3(numéro 1),

Avec la réforme de la politique agricole commune (PAC) initiée en 2010, la politique de protection de l’environnement se trouve au centre de tous les débats. Le projet de verdissement ou greening proposé ... [more ▼]

Avec la réforme de la politique agricole commune (PAC) initiée en 2010, la politique de protection de l’environnement se trouve au centre de tous les débats. Le projet de verdissement ou greening proposé par la Commission européenne aurait dû marquer durablement les deux piliers de la PAC que sont le soutien aux marchés et le développement rural. Le Conseil des ministres de l’agriculture s’est prononcé lors de la session des 18 et 19 mars 2013 sur les quatre propositions de règlements. L’accord dégagé ne reflète pas la vision environnementale souhaitée par la Commission. Certes, le verdissement existe toujours, mais vidé de sa substance. Les négociations ne sont évidemment pas terminées. La prochaine étape sera un trilogue entre Commission européenne, Parlement européen et Conseil dans l’espoir d’aboutir à un texte final pour la fin du mois de juin et une entrée en vigueur partielle de la réforme en 2014 puis 2015. [less ▲]

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See detailCompte rendu de Frédéric DUVAL, Le Mystère de saint Clément de Metz
Henrard, Nadine ULg

in Revue de Linguistique Romane (2013), t. 77(n°305-306), 299-306

CR de l'édition par Fr. Duval du Mystère dramatique de saint Clément, premier évêque de Metz, un texte qui pose des problèmes spécifiques d'édition puisque son manuscrit est perdu. En l’absence du témoin ... [more ▼]

CR de l'édition par Fr. Duval du Mystère dramatique de saint Clément, premier évêque de Metz, un texte qui pose des problèmes spécifiques d'édition puisque son manuscrit est perdu. En l’absence du témoin principal, F.D. disposait, outre d'une ancienne édition établie par Charles Abel (1861), de trois documents : la thèse qu’un élève de Stengel, Fritz Tinius, consacra en 1909 à l’étude de la langue du drame ; un fac-similé de la main d’Abel (cette reproduction de quatre vers du ms. original suffit à laisser entrevoir les confusions auxquelle pouvaient conduire les tracés de la copie) ; quelques feuilles des dernières épreuves du mystère, avec des corrections d’Abel qui permettent de mieux saisir la manière d’opérer du savant. Au-delà du fait qu’il donne enfin à lire un texte incontestablement plus sûr que celui d’Abel, le travail de F.D. présente aussi un autre intérêt remarquable : il offre une magistrale démonstration de philologie en faisant voir comment l’on peut réaliser à frais nouveaux et sur des bases aussi fermes que possible l’édition critique d’un texte dont le manuscrit unique n’existe plus, puisqu'il a brûlé lors de la deuxième guerre mondiale. [less ▲]

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See detailLa charge vocale
Morsomme, Dominique ULg; Remacle, Angélique ULg

in Rééducation Orthophonique (2013), 254

Ce chapitre est consacré à la charge vocale, définie comme une quantité d’utilisation de la voix par unité de temps. La durée, le niveau de pression sonore et la hauteur tonale sont les trois facteurs ... [more ▼]

Ce chapitre est consacré à la charge vocale, définie comme une quantité d’utilisation de la voix par unité de temps. La durée, le niveau de pression sonore et la hauteur tonale sont les trois facteurs principaux qui l’influencent. Pour analyser son incidence sur la voix, nous devons également tenir compte de l’environnement dans lequel évolue le locuteur. Les effets de la charge vocale sur le plan laryngé sont fonction de la physiologie propre à chaque individu. Le dosimètre ou accumulateur vocal est l’outil qui vise à quantifier la charge vocale. Cette instrumentation permet d’observer les comportements vocaux des locuteurs sur de longues périodes en situation écologique. D’un point de vue clinique, la prise en compte de la charge vocale influence nos plans thérapeutiques. Outre les principes de rééducation connus, nous discutons entre autres de l’apport du micro amplificateur et de la nécessité du repos vocal. [less ▲]

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See detailSur Daniel Giovannangeli, "Figures de la facticité"
Cavazzini, Andrea ULg

in Année Sartrienne (L') : Bulletin du Groupe d'Etudes Sartriennes (2013)

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See detailL'avenir des modèles 3D urbains
Billen, Roland ULg

in GeoPlatform (2013), 2(4), 22-25

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See detailOver een toiletartikel: Hendrik van Veldekes 'Sente Servaes' en Camille Huysmans
Steyaert, Kris ULg

in Spiegel der Letteren (2013), 55(2), 189-200

In 1858 J.H. Bormans published the first edition of Hendrik van Veldeke’s legend of Saint Servatius which had only just come to light. Nearly forty years later, Camille Huysmans supplied additional ... [more ▼]

In 1858 J.H. Bormans published the first edition of Hendrik van Veldeke’s legend of Saint Servatius which had only just come to light. Nearly forty years later, Camille Huysmans supplied additional information about the work’s discovery. In a humorous letter printed in the Limburgsch jaarboek (1895-1896) he revealed how one of his former teachers, during a visit to a friend’s house, had stumbled upon the fifteenth-century manuscript in the toilet, ready to be used as toilet paper. Only recently have scholars begun to cast doubt on Huysmans’s story. A closer look at Huysmans’s student career in Liège and his involvement in the association Onze Taal (Our Language) may shed new light on the origins and veracity of his account. [less ▲]

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See detailParapet wall effect on Piano Key Weirs efficiency
Machiels, Olivier; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Journal of Irrigation & Drainage Engineering (2013), 139(6), 506-511

Piano Key Weir is a cost effective solution for rehabilitation as well as for new dam projects with a high level of constraints (limited space, high specific flood discharge, small reservoir level ... [more ▼]

Piano Key Weir is a cost effective solution for rehabilitation as well as for new dam projects with a high level of constraints (limited space, high specific flood discharge, small reservoir level variation). While the higher efficiency of the Piano Key Weir compared to standard linear weirs has already been demonstrated, its optimal geometry is still poorly defined. In order to improve the design of the complex geometry of this structure, the use of parapet walls has been tested. They consist of vertical extensions placed over the weir crest. Following a former study of the influence of the weir height on its discharge capacity, this paper presents the results of an experimental campaign dedicated to investigating the effect of parapet walls to increase weir height while reducing bottom slopes and keeping the weir height constant. These results indicate the relative influences of the alveoli bottom slopes and of the weir height on the Piano Key Weir release capacity. Comparisons with former experimental results as well as design guidelines are also provided. [less ▲]

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See detailLa rémunération du temps de garde des pompiers volontaires
Kefer, Fabienne ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2013)

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See detailLe remplissement des objets idéaux. Sur la théorie du remplissement catégorial dans la VIe Recherche logique de Husserl
Gyemant, Maria ULg

in Bulletin d'Analyse Phénoménologique (2013), IX(4),

Ce travail porte sur la question du remplissement des visées d’objets idéaux. Dans la VIe Recherche logique Husserl soulève cette question en introduisant un nouveau concept : le concept d’intuition ... [more ▼]

Ce travail porte sur la question du remplissement des visées d’objets idéaux. Dans la VIe Recherche logique Husserl soulève cette question en introduisant un nouveau concept : le concept d’intuition catégoriale. La connaissance des objets idéaux passe selon Husserl par un remplissement qui se réalise au moyen d’une intuition particulière, dans laquelle l’objet idéal se donne en personne, et qui s’oppose à l’intuition sensible. Dans quelle mesure une telle intuition est-elle possible ? Qu’est-ce qui est à proprement parler intuitionné en elle et comment cette intuition se rapporte-t-elle aux intuitions sensibles ? Telles sont les principales questions que je soulèverai dans cette étude. Ce travail me permettra ensuite de formuler un diagnostic sur les tensions qui persistent dans les Recherches logiques, et qui ne seront résolues que par la réduction transcendantale. [less ▲]

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See detailMetastability bounds on the two Higgs doublet model
Barroso, Augusto; Ferreira, Pedro; Ivanov, Igor ULg et al

in Journal of High Energy Physics [=JHEP] (2013), 1306

In the two Higgs doublet model, there is the possibility that the vacuum where the universe resides in is metastable. We present the tree-level bounds on the scalar potential parameters which have to be ... [more ▼]

In the two Higgs doublet model, there is the possibility that the vacuum where the universe resides in is metastable. We present the tree-level bounds on the scalar potential parameters which have to be obeyed to prevent that situation. Analytical expressions for those bounds are shown for the most used potential, that with a softly broken Z 2 symmetry. The impact of those bounds on the model’s phenomenology is discussed in detail, as well as the importance of the current LHC results in determining whether the vacuum we live in is or is not stable. We demonstrate how the vacuum stability bounds can be obtained for the most generic CP-conserving potential, and provide a simple method to implement them. [less ▲]

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See detailAn integration of external information for foreign stallions into the Belgian genetic evaluation for jumping horses
Vandenplas, Jérémie ULg; Janssens, Steven; Buys, Nadine et al

in Journal of Animal Breeding & Genetics (2013), 130(3), 209-217

The aim of this study was to test the integration of external information, i.e. foreign estimated breeding values (EBV) and the associated reliabilities (REL), for stallions into the Belgian genetic ... [more ▼]

The aim of this study was to test the integration of external information, i.e. foreign estimated breeding values (EBV) and the associated reliabilities (REL), for stallions into the Belgian genetic evaluation for jumping horses. The Belgian model is a bivariate repeatability Best Linear Unbiased Prediction animal model only based on Belgian performances while Belgian breeders import horses from neighbouring countries. Thereby, use of external information is needed as prior to achieve more accurate EBV. Pedigree and performance data contained 101,382 horses and 712,212 performances, respectively. After conversion to the Belgian trait, external information of 98 French and 67 Dutch stallions were integrated into the Belgian evaluation. Resulting Belgian rankings of the foreign stallions were more similar to foreign rankings according to the increase of the rank correlations of at least 12%. REL of their EBV were improved of at least 2% on average. External information was partially to totally equivalent to 4 years of contemporary horses’ performances or to all the stallions’ own performances. All these results showed the interest to integrate external information into the Belgian evaluation. [less ▲]

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See detailTechno-economic survey of Organic Rankine Cycle (ORC) systems
Quoilin, Sylvain ULg; van den Broeck, Martijn; Declaye, Sébastien ULg et al

in Renewable & Sustainable Energy Reviews (2013), 22

New heat conversion technologies need to be developed and improved to take advantage of the necessary increase in the supply of renewable energy. The Organic Rankine Cycle is well suited for these ... [more ▼]

New heat conversion technologies need to be developed and improved to take advantage of the necessary increase in the supply of renewable energy. The Organic Rankine Cycle is well suited for these applications, mainly because of its ability to recover low-grade heat and the possibility to be implemented in decentralized lower-capacity power plants. In This paper, an overview of the different ORC applications is presented. A market review is proposed including cost figures for several commercial ORC modules and manufacturers. An in-depth analysis of the technical challenges related to the technology, such as working fluid selection and expansion machine issues is then reported. Technological constraints and optimization methods are extensively described and discussed. Finally, the current trends in research and development for the next generation of Organic Rankine Cycles are presented. [less ▲]

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See detailHow to define responders in osteoarthritis
Cooper, Cyrus; Adachi, Jonathan D; Bardin, Thomas et al

in Current Medical Research & Opinion (2013), 29(6), 719-29

Background: Osteoarthritis is a clinical syndrome of failure of the joint accompanied by varying degrees of joint pain, functional limitation, and reduced quality of life due to deterioration of articular ... [more ▼]

Background: Osteoarthritis is a clinical syndrome of failure of the joint accompanied by varying degrees of joint pain, functional limitation, and reduced quality of life due to deterioration of articular cartilage and involvement of other joint structures. Scope: Regulatory agencies require relevant clinical benefit on symptoms and structure modification for registration of a new therapy as a disease-modifying osteoarthritis drug (DMOAD). An international Working Group of the European Society on Clinical and Economic Aspects of Osteoporosis and Osteoarthritis (ESCEO) and International Osteoporosis Foundation was convened to explore the current burden of osteoarthritis, review current regulatory guidelines for the conduct of clinical trials, and examine the concept of responder analyses for improving drug evaluation in osteoarthritis. Findings: The ESCEO considers that the major challenges in DMOAD development are the absence of a precise definition of the disease, particularly in the early stages, and the lack of consensus on how to detect structural changes and link them to clinically meaningful endpoints. Responder criteria should help identify progression of disease and be clinically meaningful. The ideal criterion should be sensitive to change over time and should predict disease progression and outcomes such as joint replacement. Conclusion: The ESCEO considers that, for knee osteoarthritis, clinical trial data indicate that radiographic joint space narrowing40.5mm over 2 or 3 years might be a reliable surrogate measure for total joint replacement. On-going research using techniques such as magnetic resonance imaging and biochemical markers may allow the identification of these patients earlier in the disease process [less ▲]

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See detailParlementsleden over het Belgische federalisme
Sinardet, Dave; Dodeigne, Jérémy ULg; Reuchamps, Min

in Samenleving en Politiek : Tijdschrift voor een Democratisch Socialisme (2013), 20(6), 4-20

Tijdens de 541 dagen dat België geen volwaardige federale regering had en in een politieke crisis verkeerde, waren het vooral de partijtoppen die het politieke toneel beheersten en in de media aan bod ... [more ▼]

Tijdens de 541 dagen dat België geen volwaardige federale regering had en in een politieke crisis verkeerde, waren het vooral de partijtoppen die het politieke toneel beheersten en in de media aan bod kwamen. Intussen zijn de federale parlementsleden aan zet. Zij moeten de wetgeving stemmen die de zesde staatshervorming uitvoert. Toch verhindert de partijdiscipline heel vaak dat zij zich ongeremd uitlaten over hun visie op het federalisme in België, zeker als er een akkoord is bereikt. Dit onderzoek, dat in de zomer van 2011 werd verricht, dus voor het akkoord over de staatshervorming tot stand kwam, had precies de bedoeling om de parlementsleden te vragen naar hun perceptie van het federalisme in België. We hebben niet enkel de federale parlementsleden ondervraagd maar ook hun collega’s uit de regionale parlementen. In dit artikel bespreken we kort enkele resultaten van dit onderzoek [less ▲]

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See detailNew Insights Into Aortic Diseases A Report From the Third International Meeting on Aortic Diseases (IMAD3)
KUIVANIEMI, Helena; SAKALIHASAN, Natzi ULg; LEDERLE, Franck et al

in AORTA (2013), 1

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See detailThe effect of fiber morphology on the tensile strength of natural fibers
Alves Fidelis, Maria Ernestina; Vitorino Castro Pereira, Thatiana; Da Fonseca Martins Gomes, Otavio ULg et al

in Journal of Materials Research and Technology (2013), 2(2), 149-157

In the present work the morphology of natural fibers was correlated with their mechanical properties via image analysis. Jute, sisal, curaua, coir and piassava fibers were tested under direct tension in a ... [more ▼]

In the present work the morphology of natural fibers was correlated with their mechanical properties via image analysis. Jute, sisal, curaua, coir and piassava fibers were tested under direct tension in a universal testing machine and the cross-sectional areas of the fibers were calculated using images obtained in a scanning electron microscopy. For the jute fiber the tests were performed for several gage lengths in order to investigate its influence on the tensile strength and to compute the machine compliance. For sisal, jute and curaua fibers the amount of fiber-cells, the size of the cell walls and the real area of the fibers were measured and their correlation with the tensile strength addressed. The curaua fiber presented the highest mechanical performance with tensile strength and Young's modulus of 543 MPa and 63.7 GPa, respectively. Weibull statistical analysis was used to quantify the variability of fiber strength. The sisal fibers presented the highest Weibull modulus (3.70), whereas the curaua presented the lowest one (m = 2.2), which means that the sisal had the lowest variability and curaua the highest. [less ▲]

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See detailEnjeux techniques, symboliques et politiques de la mesure de la diversité dans les entreprises et les organisations?
ZANNAD, Hedia; STONE Pete ,, Pete; Cornet, Annie ULg

in Management International = International Management = Gestión Internacional (2013)

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See detailA Pathway closely related to the D-tagatose pathway of Gram-Negative Enterobacteria Identified in the Gram-Positive Bacterium Bacillus licheniformis
Van Der Heiden, Edwige ULg; Delmarcelle, Michaël ULg; Lebrun, Sarah ULg et al

in Applied and Environmental microbiology (2013), 79(11), 3511-3515

We report the first identification of a gene cluster involved in d-tagatose catabolism in Bacillus licheniformis. The pathway is closely related to the d-tagatose pathway of the Gram-negative bacterium ... [more ▼]

We report the first identification of a gene cluster involved in d-tagatose catabolism in Bacillus licheniformis. The pathway is closely related to the d-tagatose pathway of the Gram-negative bacterium Klebsiella oxytoca, in contrast to the d-tagatose 6-phosphate pathway described in the Gram-positive bacterium Staphylococcus aureus. [less ▲]

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See detailPrincipes du traitement pharmacologique de l'addiction
Saadan, Myriam; Scuvée, Jacqueline ULg; Seutin, Vincent ULg

in Revue Médicale de Liège (2013), 68(5-6), 245-251

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See detailIs Contact Between Conspecifics Involved in the Cohesion of Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) Aggregations?
Durieux, Delphine ULg; Fassotte, Bérénice ULg; Fischer, Christophe ULg et al

in Journal of Insect Behavior (2013)

The multicolored Asian ladybeetle, Harmonia axyridis (Pallas), exhibits a gregarious behavior during unfavorable winter conditions. Although this behavior is currently described as a phenomenon occurring ... [more ▼]

The multicolored Asian ladybeetle, Harmonia axyridis (Pallas), exhibits a gregarious behavior during unfavorable winter conditions. Although this behavior is currently described as a phenomenon occurring only during winter, aggregations can also be observed outside overwintering conditions. However, the substrate markings previously highlighted as being involved in the wintry aggregation of this exotic species do not seem to be used by non-overwintering individuals to aggregate. This fact suggests then that other cues are responsible for the induction of this behavior. In this work, we have tested the hypothesis that direct contact between non-overwintering individuals stimulates the establishment of clusters. Binary choice experiments highlighted the involvement of elytral cuticular compounds in this phenomenon. Chromatographic analyses showed that the active extracts contained mainly hydrocarbons, including saturated, mono-unsaturated, and di-unsaturated homologues. Physical contact also seems to be involved in the non-overwintering aggregative behavior of H. axyridis, but to a lesser extent than these natural compounds. These findings could eventually be used to develop new control methods of these pest populations and so, reduce the adverse impacts it causes on biodiversity. [less ▲]

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See detailDe futurs maitres face aux copies des lycéens. L'évaluation de la qualité de la langue dans la correction de travaux écrits
Van Beveren, Julien ULg; Dumortier, Jean-Louis ULg; Dispy, Micheline ULg

in Français Aujourd'Hui (Le) (2013), 181

Notre contribution contient quelques-uns des constats que nous avons dressés en analysant un corpus de corrections, par de futurs maitres, de travaux écrits par des lycéens. Nous avons abordé, dans cet ... [more ▼]

Notre contribution contient quelques-uns des constats que nous avons dressés en analysant un corpus de corrections, par de futurs maitres, de travaux écrits par des lycéens. Nous avons abordé, dans cet article, la question du recours à certains signes pour annoter les copies, celle de la « surcorrection », celle des corrections maladroites ou erronées et celle du non-repérage de certaines erreurs commises par les lycéens. Cette analyse nous porte à conclure que, spontanément, la plupart des futurs enseignants de français que nous formons n’envisagent pas leur intervention sur les copies dans le cadre d’une interaction d’enseignement-apprentissage finalisée par le développement de compétences d’écriture. [less ▲]

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See detailL'avenir du fédéralisme en Belgique. Visions des parlementaires fédéraux et régionaux avant l'accord sur la sixième réforme de l’État
Dodeigne, Jérémy ULg; Reuchamps, Min; Sinardet, Dave

in Revue Nouvelle (2013), 6

La crise politique belge a mis à l'avant plan de la scène médiatique et politique les états-majors des partis durant la période de 541 jours sans gouvernement. Ce sont désormais les parlementaires qui ... [more ▼]

La crise politique belge a mis à l'avant plan de la scène médiatique et politique les états-majors des partis durant la période de 541 jours sans gouvernement. Ce sont désormais les parlementaires qui doivent voter les lois mettant en œuvre la sixième réforme de l’État. Toutefois, la discipline des partis empêche bien souvent ceux-ci d’exprimer en toute liberté leur vision du fédéralisme belge, surtout après qu’un accord est intervenu. Cette enquête menée auprès de tous les parlementaires du pays durant l’été 2011, soit un peu avant l’accord sur la réforme de l’État, visait précisément à questionner l’opinion des parlementaires sur leur perception de l'avenir du fédéralisme en Belgique. Dans cet article, nous présentons brièvement les résultats de cette enquête. [less ▲]

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See detailMeans, Motive, and Opportunity: SDH Mutations Are Suspects in Pituitary Tumors.
BECKERS, Albert ULg

in Journal of Clinical Endocrinology and Metabolism (2013), 98(6), 2274-6

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See detailCon: Should we abandon the use of the MDRD equation in favour of the CKD-EPI equation?
DELANAYE, Pierre ULg; Pottel, Hans; Botev, Rossini

in Nephrology Dialysis Transplantation (2013), 28(6), 1396-1403

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See detailMultiplier l’acquisition de bases de données bibliographiques pour enrichir la recherche documentaire : mythe ou réalité ?
Decoster, Sara ULg; Simon, Stéphanie ULg; Van Ruymbeke, Muriel ULg

in Cahiers de la Documentation = Bladen voor Documentatie (2013), 67(2), 28-40

Cet article propose une analyse approfondie de quatre bases de données bibliographiques sous abonnement disponibles à l’Université de Liège, sur deux plateformes différentes, dans le domaine des études ... [more ▼]

Cet article propose une analyse approfondie de quatre bases de données bibliographiques sous abonnement disponibles à l’Université de Liège, sur deux plateformes différentes, dans le domaine des études linguistiques et littéraires. Les outils concernés offrent une couverture générale du domaine, au sens où ils ne sont pas spécialisés dans une période chronologique ou une langue particulière. Les quatre bases de données analysées sont MLA International Bibliography et Communication & Mass Media Complete (CMMC), accessibles via Ebsco, ainsi que Francis et Linguistics and Language Behavior Abstracts (LLBA) sur la plateforme ProQuest. L’objectif de l’article est d’évaluer le bénéfice que l’utilisateur peut tirer de ces produits. Afin d’y parvenir, l’analyse suit des axes centrés sur le contenu et la complémentarité des ressources ainsi que sur les fonctionnalités proposées. Les résultats de ce travail peuvent alimenter une réflexion sur l’évolution de la bibliothéconomie et sa place dans le monde de la recherche et de l’enseignement. [less ▲]

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See detailLes médecins généralistes belges francophones peuvent-ils améliorer leurs performances en prévention ? Une étude qualitative
Vanmeerbeek, Marc ULg; Belche, Jean-Luc ULg; Lemaître, Anne-Françoise ULg et al

in Exercer (2013), 107

Background In French-speaking Belgium, success in implementing preventive care remains below expectations, with a socioeconomic gradient. Could GPs contribute to reduce these differences? Objectives The ... [more ▼]

Background In French-speaking Belgium, success in implementing preventive care remains below expectations, with a socioeconomic gradient. Could GPs contribute to reduce these differences? Objectives The study aims at knowing the representations of French-speaking GPs towards their preventive healthcare. The results will be used in a survey assessing the determinants of their involvement in a more systematic and equitable preventive healthcare delivery. Methods We conducted semi-directed interviews with French-speaking GPs. The content was analyzed in a thematic way with reference to the Walsh & McPhee systems model of clinical preventive care to retrieve the predisposing, reinforcing, and enabling factors. Results Preventive healthcare was limited by GPs’ specific interests and psychology. Some clinical and relational skills were sometimes lacking. The information sources were sometimes of poor quality. The lack of organizational skills hindered collective management or systematization towards equity. Media and pharmaceuticals influenced preventive healthcare. GPs wished a specific funding; possibly by “Pay for Quality”. Self assessment was too rare to be a reinforcement factor. Preventive processes were often introduced in an opportunistic way, due to the lack of time. Data circulation and coordination between the various providers was poor. A primary care focused healthcare delivery was suggested. Conclusions Conditions to tackle health inequalities towards preventive healthcare don’t seem to be present at now. To achieve this goal, GPs should be more proactive and develop their practice in a more community-oriented way. However, more research is needed to assess their personal motivation for change. Health authorities should determine a delimitation of competencies and responsibilities and provide organisational support. [less ▲]

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See detailElectrophysiological and behavioural responses of Thanatophilus sinuatus F. (Coleoptera: Silphidae) to selected cadaveric volatile organic compounds
Dekeirsschieter, Jessica ULg; Frederickx, Christine ULg; Lognay, Georges ULg et al

in Journal of Forensic Sciences (2013)

Soon after death, carcasses release volatile chemicals that attract carrion insects including Silphidae. Nevertheless, it is not known which chemical cues are involved in the attractiveness of the carcass ... [more ▼]

Soon after death, carcasses release volatile chemicals that attract carrion insects including Silphidae. Nevertheless, it is not known which chemical cues are involved in the attractiveness of the carcass. So far, little information is available on the chemical ecology of carrion beetles, particularly concerning the subfamily of Silphinae. The biological role of selected cadaveric volatile organic compounds including: dimethyldisulfide (DMDS), butan-1-ol, n-butanoic acid, indole, phenol, p-cresol, putrescine, and cadaverine on the silphine species, Thanatophilus sinuatus Fabricius, was investigated by using both electrophysiological and behavioural techniques. Among the tested cadaveric compounds, butan-1-ol and DMDS elicited the strongest EAG from both T. sinuatus male and female antennae. In a two-arm olfactometer, males and females were significantly attracted to dimethyldisulfide (DMDS) for both tested doses, whereas only males were attracted to p-cresol at 100 ng. Putrescine was repellent to males at the dose of 1 µg [less ▲]

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See detailLes venins animaux sont-ils les pharmaciens du futur?
Quinton, Loïc ULg

in Chimie Nouvelle (2013)

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See detailProteomic analyses of serous and endometrioid epithelial ovarian cancers - cases studies - molecular insights of a possible histological etiology of serous ovarian cancer.
Longuespée, Rémi ULg; Gagnon, Hugo; Boyon, Charlotte et al

in Proteomics. Clinical Applications (2013), 7(5-6), 337-54

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See detailQuelles perspectives pour les énergies renouvelables en Wallonie ?
Ernst, Damien ULg

in LiègeU (2013), Eté 2013

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See detailLa Belgique face au traité de l'Élysée (1962-1963). Axe Paris-Bonn ou influence de Bruxelles ?
Genin, Vincent ULg

in Revue d'Allemagne et des Pays de Langue Allemande (2013), 45(1), 185-201

The French-German rapprochement, the outcome of which takes shape by the signature of the Elysee treaty, on January 22nd 1963, represents an important moment on the international scene. That’s why it is ... [more ▼]

The French-German rapprochement, the outcome of which takes shape by the signature of the Elysee treaty, on January 22nd 1963, represents an important moment on the international scene. That’s why it is stimulating to study the way one of the « small countries » of the Common Market, Belgium, considered it, from the angle of its foreign policy. How will react to it Brussels, the diplomacy of which is led by Paul-Henri Spaak, supporter of the integration, one year after its rejection of the Plan Fouchet (April 1962) ? We try to answer this question by means of three angles of approach. 1. The evolution of the fear of seeing appearing an « axis » Paris-Bonn, imposing his hegemony on « small countries ». In that case, which place for Belgium ? 2. A study of the information sources of the Belgian diplomacy. 3. The impact of the Elysee Treaty on some diplomatic corps. [less ▲]

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See detailThe variable parameters T2 chart with run rules
Faraz, Alireza ULg; Celano, Giovanni; Heuchenne, Cédric ULg et al

in Statistical Papers (2013)

The Hotelling’s T2 control chart with variable parameters (VP T2) has been shown to have better statistical performance than other adaptive control schemes in detecting small to moderate process mean ... [more ▼]

The Hotelling’s T2 control chart with variable parameters (VP T2) has been shown to have better statistical performance than other adaptive control schemes in detecting small to moderate process mean shifts. In this paper, we investigate the statistical performance of the VP T2 control chart coupled with run rules. We consider two well-known run rules schemes. Statistical performance is evaluated by using a Markov chain modeling the random shock mechanism of the monitored process. The in-control time interval of the process is assumed to follow an exponential distribution. A Genetic Algorithm has been designed to select the optimal chart design parameters. We provide an extensive numerical analysis indicating that the VP T2 control chart with run rules outperforms other charts for small sizes of the mean shift expressed through the Mahalanobis distance. [less ▲]

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See detailImpacts of logging and hunting on western lowland gorilla (Gorilla gorilla gorilla) populations and consequences for forest regeneration. A review
Haurez, Barbara ULg; Petre, Charles-Albert ULg; Doucet, Jean-Louis ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2013), 17(2), 364-317

Timber exploitation is rapidly expanding throughout the Congo Basin. Forest areas assigned to timber harvesting have sharply expanded over the decades and logging concessions now largely overlap with the ... [more ▼]

Timber exploitation is rapidly expanding throughout the Congo Basin. Forest areas assigned to timber harvesting have sharply expanded over the decades and logging concessions now largely overlap with the range of western lowland gorilla (Gorilla gorilla gorilla Savage & Wyman, 1847). However this species, which is considered as critically endangered by IUCN, could play an essential role in maintaining the structure and composition of tropical rainforest notably through seed dispersal services. This is likely due to its frugivorous diet, high stomach capacity and ability to swallow seeds of variable sizes. Moreover gorillas have a long gut retention time of ingested food, travel long daily distances and deposit most ingested seeds in suitable habitats for plant development (such as logging gaps). Consequently, the preservation of the role of gorilla in forest regeneration is essential in the context of logged forest ecosystems. Timber harvesting has two major opposing impacts on gorilla populations: on the one hand, gorillas benefit from growth of herbaceous vegetation (e.g. Marantaceae and Zingiberaceae) following forest canopy opening, as such herbs provide both staple food and nest-building materials; on the other hand, gorilla populations suffer with the rise in hunting associated with logging activity, especially with road network installation. Considering the potential negative knock-on effects of logging concessions on the ecological function of western lowland gorilla, the implementation of timber harvesting methods that preserve gorilla populations is a considerable challenge for forest sustainability, as well as for gorilla’s conservation. [less ▲]

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See detailEffet du Système Public d'Information sur les Marchés (SPIM) sur les prix reçus par les producteurs de maïs au Bénin
Kpenavoun Chogou, Sylvain; Gandonou, Esaïe

in Bulletin de la Recherche Agronomique du Bénin (2013), 73

Public Market Information System (PMIS) is implemented in Benin to collect food prices and their flows which are largely disseminated mainly through national or community radio stations in all regions ... [more ▼]

Public Market Information System (PMIS) is implemented in Benin to collect food prices and their flows which are largely disseminated mainly through national or community radio stations in all regions. This intervention is expected to deliver significant positive impacts on food producers. However, little empirical and systematic analysis has been carried out to evaluate them, particularly the effects on farm gate prices. This article analyses how the reception of improved agricultural market information affects the maize farm gate prices. A distinction has made between access to market information and use of market information. A closer follow-up over each maize transaction during one year was implemented among a stratified sample of 124 maize surplus producers. We find evidence suggesting that better-informed farmers by PMIS managed to bargain for higher prices irrespectively to the transaction modes (selling under contract, selling on distant market, selling at the farm gate without contract). The average price difference per kilogram of maize sold between households with and without PMIS (also referred to as an SPIM premium or PMIS rent) is 23%. The data showed that a farmer who sells under contract with an itinerant trader (contract accompanied by an offer of credit) received the lower prices but they received a higher price when they have access to and use PMIS data. The study confirmed that PMIS is a useful intervention which together with improved access to credit will allow smallholders to better exploit market opportunities. [less ▲]

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See detailVestiges et prestige de l’intellectuel. Recension de Jean-François LOUETTE, Traces de Sartre (ELLUG, 2009)
Stienon, Valérie ULg

in Année Sartrienne (L') : Bulletin du Groupe d'Etudes Sartriennes (2013), 27

Si les bibliothèques ne sont guère que cimetières une fois passée la première réception des œuvres qu’elles amassent, il convient parfois d’en exhumer de beaux restes. Dans la suite de son « Silences de ... [more ▼]

Si les bibliothèques ne sont guère que cimetières une fois passée la première réception des œuvres qu’elles amassent, il convient parfois d’en exhumer de beaux restes. Dans la suite de son « Silences de Sartre » (1995), Jean-François Louette emboîte à nouveau le pas de l’intellectuel. La « trace » multiple dont l’auteur fait ici son fil rouge doit s’entendre au double sens révérencieux (se placer dans le sillage de) et heuristique (reconstituer la partie évanescente). C’est assez dire que l’ouvrage se bâtit sur le constat d’un estompement contemporain de la figure patrimoniale de Sartre, qu’il convient en conséquence de réhabiliter en vertu d’un héritage particulièrement riche. Pour ce faire, Louette prend le parti et le point de vue de l’« amateur », envisageant même, avec une ambitieuse modestie qu’on appréciera, de toucher les « amateurs de Sartre en particulier, et les amateurs de littérature en général » (p. 5). Rassemblant à nouveaux frais des études parues antérieurement, le volume offre un parcours qui s’ordonne selon la chronologie des publications des textes sartriens, logique à laquelle viennent se surimposer d’autres dynamiques d’agrégation. L’ensemble qui en résulte compose une synthèse diffractée, stimulante et efficace, qui va au-delà de la seule considération des genres d’écriture et des conjectures de l’Histoire pour privilégier la complexité de tout un parcours intellectuel. [less ▲]

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See detailObésité et carences préopératoires
DE FLINES, Jenny ULg; BRUWIER, Laurent; DE ROOVER, Arnaud ULg et al

in Nutrition Clinique et Metabolisme (2013), 27(2), 82-86

It is a common belief that nutritional deficiencies are rare in the Western world due to a wide variety of food supply. However, obese people usually consume dense-energy food but of poor nutritional ... [more ▼]

It is a common belief that nutritional deficiencies are rare in the Western world due to a wide variety of food supply. However, obese people usually consume dense-energy food but of poor nutritional value that lacks proteins, vitamins, minerals and fiber; consequently, a high prevalence of micronutrient deficiencies in obese subjects has been reported. Moreover, bariatric surgery has been proven the most effective treatment of morbid obesity, but micronutrient deficiency following bariatric surgery is a major concern, worsening pre-operative nutritional deficiencies. In this article, we reviewed the litterature and highlighted the prevalence of nutritional deficiencies in the morbidly obese population prior to bariatric surgery, clinical consequences of these deficiencies and practical recommendations for these subjects. [less ▲]

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See detailTurbulent flows in straight compound open-channel with a transverse embankment on the floodplain
Peltier, Yann ULg; Proust, S.; Rivière, N. et al

in Journal of Hydraulic Research (2013), 51(4), 446-458

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See detailCompte-rendu de l'ouvrage de A. Beyaert-Geslin: Sémiotique du design
Dondero, Maria Giulia ULg

in Questions de Communication (2013), 23

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See detailNouveaux regards sur de Gaulle, la période gaullienne et la Belgique
Lanneau, Catherine ULg

in Grandeur. Revue trimestrielle du Cercle d'Etudes Charles de Gaulle (2013), 129

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See detailTerm extraction from sparse, ungrammatical domain-specific documents
Ittoo, Ashwin ULg; Bouma, Gosse

in Expert Systems with Applications (2013), 40(7), 2530-2540

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See detailInfluence de la communication d’informations sur le comportement des analystes financiers en France
Ajina, Aymen ULg; Habib, Aymen; Laouiti, Mhamed

in La Revue du FINANCIER (2013), 35

This article aims to study the influence of the disclosure on the behavior of financial analysts. The literature demonstrates first the significant influence of analysts on the behavior of investors and ... [more ▼]

This article aims to study the influence of the disclosure on the behavior of financial analysts. The literature demonstrates first the significant influence of analysts on the behavior of investors and second, the perception by analysts as leader’s actor affecting the stock price of the company. Thus, financial analysts are important intermediates information in financial markets. Our sample includes 189 French companies during the period 2007 to 2011. The results reveal a positive relationship between the extent of disclosure and the number of financial analysts firms in the sample. Thus, the transparency of the French market must go through the introduction of more specific constraints to the characteristics of financial analysts. [less ▲]

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See detailProfitability of using warning system for foliar disease of wheat in the Grand-Duchy of Luxembourg
El Jarroudi, Moussa ULg; Kouadio, Louis; Beyer, Marco et al

in Phytopathology (2013), 103

Although small grain cereals (i.e. winter wheat) are routinely protected with two or three foliar treatments in the Grand-Duchy of Luxembourg (GDL), environmental concerns and changes in the cost-benefit ... [more ▼]

Although small grain cereals (i.e. winter wheat) are routinely protected with two or three foliar treatments in the Grand-Duchy of Luxembourg (GDL), environmental concerns and changes in the cost-benefit ratio are likely to increase the demand for more accurate identification of spraying needs. A Vol. 103 (Supplement 2), No. 6, 2013 S2.39 warning system assessing in real time the risk of progression of fungal diseases on winter wheat (Triticum aestivum L.) was tested in the GDL over the 2009-2012 period in four-replicated field experiments located in three representative villages of the different agro-climatological zones. The fungicide treatments recommended by the warning system during this period have ensured economic profitability equivalent to or even better than double and triple treatments. In 2010 and 2011, weather conditions impeded fungal infections of wheat and no warning was issued, reducing fungicide use. The study also highlighted that multiple fungicide applications were not better than a single application. In 2009 and 2012, although the weather conditions were very favourable for fungal wheat diseases, the single recommended fungicide application resulted in an additional yield of 30% compared to untreated plots. This study shows the importance of the positioning of fungicide treatment in such a warning system and in strategies aiming at reducing the spread fungicide molecules in the environment. [less ▲]

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See detailThe risk factors for the rupture of the anterior cruciate ligament of the knee: the neuromuscular state
Kaux, Jean-François ULg; Delvaux, François ULg; Forthomme, Bénédicte ULg et al

in OA Sports Medicine (2013), 1(1), 95

Multiple factors act conjointly to influence the risk of injury of the anterior cruciate ligament of the knee. An understanding of neuromuscular factors remains necessary, although this does not guarantee ... [more ▼]

Multiple factors act conjointly to influence the risk of injury of the anterior cruciate ligament of the knee. An understanding of neuromuscular factors remains necessary, although this does not guarantee a complete analysis of the risks of injury to the anterior cruciate ligament. Women have a greater risk of injury to the anterior cruciate ligament in comparison to men. This can be explained by an increase in the internal rotation of the hip, coupled with an increase in the external rotation of the tibia and increased muscular activation of the quadriceps (with a concomitant decrease in hamstring activity) during landing or pivotal movements. In addition, muscular fatigue of the hamstrings and a weak hamstring/quadriceps ratio could contribute to the risk of injury to the anterior cruciate ligament. Finally, a lack of relative joint laxity can also constitute a risk factor of injury to the anterior cruciate ligament in women. Other potential neuromuscular risk factors could also be highlighted. Screening for these risk factors, for example, by means of a functional jump-landing test, together with an isokinetic test, could help to recommend new prevention protocols. The aim of this review was to discuss the risk factors for the rupture of the anterior cruciate ligament of the knee. In conclusion, thanks to an overall knowledge of all the possible risk factors (intrinsic and extrinsic, modifiable or not), sports people who are predisposed to a recurrence of rupture of the anterior cruciate ligament could be identified. However, the hypothetical neuromuscular factors reported till date (Table 1) do not offer a complete understanding of this risk. [less ▲]

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See detailCompte rendu de Heinich (Nathalie), De la visibilité. Excellence et singularité en régime médiatique
Duchesne, Caroline ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2013)

"De la visibilité. Excellence et singularité en régime médiatique" interroge l’ascension de l’élite sociale nouvelle que composent, depuis le début du XXe siècle et avec l’appui du système médiatique ... [more ▼]

"De la visibilité. Excellence et singularité en régime médiatique" interroge l’ascension de l’élite sociale nouvelle que composent, depuis le début du XXe siècle et avec l’appui du système médiatique, ceux que l’on rassemble sous l’appellation de people. Très charpenté, l’ouvrage ici présenté a la forme et l’envergure d’un fort volume distribué en six parties allant de la définition de la « visibilité » (sous forme de capital social spécifique) aux valeurs morales qui s’y rattachent. [less ▲]

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See detailThe role of Bergmann glial cells in cerebellar development
Leprince, Pierre ULg

in Cancer & Metabolism (2013), 1

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See detailDiversification of the pectoral fin shape in damselfishes (Perciformes, Pomacentridae) of the Eastern Pacific
Aguilar-Medrano, Rosalia; Frederich, Bruno ULg; Balart, Eduardo F. et al

in Zoomorphology (2013)

Fin shape strongly influences performance of locomotion across all swimming styles. In this study, we focused on the diversity of the pectoral fin morphology in damselfishes of the Eastern Pacific ... [more ▼]

Fin shape strongly influences performance of locomotion across all swimming styles. In this study, we focused on the diversity of the pectoral fin morphology in damselfishes of the Eastern Pacific. Underwater observations and a review of literature allowed the characterization of ten behavioral groups. Territorial and non-territorial species were discriminated easily with traditional morphometrics. Five ecomorphological groups were recognized by geometric morphometric analyses. Geometric data segregated the outgroup from the damselfishes and allowed the distinction of mean morphologies from extreme ones within territorial and non-territorial species. Additionally, geometric morphometric data split Abudefduf into two groups: (1) A. troschelii is similar to C. atrilobata and (2) A. concolor and A. declivifrons are close to Stegastes. Solitary territorial species (e.g., Stegastes) show rounded and high fins whereas non-territorial species living in groups (e.g., Chromis) present long and curved pectoral fins. In the range of morphological variation, the morphologies of Microspathodon (elongate with highly curved hydrodynamic trailing edge) and Azurina (long, slender and angular) represent the extreme morphologies within territorial and non-territorial species, respectively. Our study revealed a strong relationship between the pectoral fin shape and the behavioral diversification in damselfishes. [less ▲]

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See detailAdult Bone Marrow Neural Crest Stem Cells and Mesenchymal Stem Cells are not able to Replace Lost Neurons in Acute MPTP-lesioned Mice
Neirinckx, Virginie ULg; Marquet, Alice ULg; Coste, Cécile ULg et al

in PLoS ONE (2013), 8(5),

Adult bone marrow stroma contains multipotent stem cells (BMSC) that are a mixed population of mesenchymal and neural-crest derived stem cells. Both cells are endowed with in vitro multi-lineage ... [more ▼]

Adult bone marrow stroma contains multipotent stem cells (BMSC) that are a mixed population of mesenchymal and neural-crest derived stem cells. Both cells are endowed with in vitro multi-lineage differentiation abilities, then constituting an attractive and easy-available source of material for cell therapy in neurological disorders. Whereas the in vivo integration and differentiation of BMSC in neurons into the central nervous system is currently matter of debate, we report here that once injected into the striatum of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated mice, pure populations of either bone marrow neural crest stem cells (NCSC) or mesenchymal stem cells (MSC) survived only transiently into the lesioned brain. Moreover, they do not migrate through the brain tissue, neither modify their initial phenotype, while no recovery of the dopaminergic system integrity was observed. Consequently, we tend to conclude that MSC/NCSC are not able to replace lost neurons in acute MPTP-lesioned dopaminergic system through a suitable integration and/or differentiation process. Altogether with recent data, it appears that neuroprotective, neurotrophic and anti-inflammatory features characterizing BMSC are of greater interest as regards CNS lesions management. [less ▲]

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See detailEnhanced pinning in superconducting thin films with graded pinning landscapes
Motta, M.; Colauto, F.; Ortiz, W.A. et al

in Applied Physics Letters (2013), 102

A graded distribution of antidots in superconducting a-Mo79Ge21 thin films has been investigated by magnetization and magneto-optical imaging measurements. The pinning landscape has maximum density at the ... [more ▼]

A graded distribution of antidots in superconducting a-Mo79Ge21 thin films has been investigated by magnetization and magneto-optical imaging measurements. The pinning landscape has maximum density at the sample border, decreasing linearly towards the center. Its overall performance is noticeably superior than that for a sample with uniformly distributed antidots: For high temperatures and low fields, the critical current is enhanced, whereas the region of thermomagnetic instabilities in the field-temperature diagram is significantly suppressed. These findings confirm the relevance of graded landscapes on the enhancement of pinning efficiency, as recently predicted by Misko and Nori [Phys. Rev. B 85, 184506 (2012)]. [less ▲]

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See detailA cultivation-independent approach for the genetic and cyanotoxin characterization of colonial cyanobacteria
Lara, Yannick ULg; Lambion, Alexandre ULg; Menzel, Diana et al

in Aquatic Microbial Ecology (2013), 69

To bypass the constraint of cyanobacterial strain isolation and cultivation, a combination of whole genome amplification (WGA) and enzyme-linked immunoassay (ELISA) for microcystin toxins (MCs) was tested ... [more ▼]

To bypass the constraint of cyanobacterial strain isolation and cultivation, a combination of whole genome amplification (WGA) and enzyme-linked immunoassay (ELISA) for microcystin toxins (MCs) was tested on individual colonies of Microcystis and Woronichinia, taken directly from aquatic environments. Genomic DNA of boiled cells was amplified by multiple strand displacement amplification (MDA), followed by several specific PCR reactions to characterize the genotype of each colony. Sequences of 3 different housekeeping genes (ftsZ, gltX, and recA), of 3 MC biosynthesis genes (mcyA, mcyB, and mcyE), and the Internal Transcribed Spacer (ITS) were analyzed for 11 colonies of Microcystis. MCs were detected and quantified by ELISA in 7 of the 11 Microcystis colonies tested, in agreement with the detection of mcy genes. Sequence types (ST) based on the concatenated sequences of housekeeping genes from cyanobacterial colonies from Belgian water bodies appeared to be endemic when compared to those of strains described in the literature. One colony appeared to belong to a yet undiscovered lineage. A similar protocol was used for 6 colonies of the genus Woronichinia, a taxon that is very difficult to cultivate in the laboratory. The 16S rRNA sequences of 2 colonies were obtained and were quasi identical to that of W. naegeliana 0LE35S01. For one Woronichinia colony, the mcyE PCR gave a non-specific PCR product. The corresponding amino acid sequence was 50% identical to a Microcystis ketoacyl carrier protein transferase. This approach for the simultaneous detection and quantification of MCs with mcy genotyping, at single colony level, offers potential for the ecotoxicological characterization of environmental populations of cyanobacteria without the need for strain isolation and culture. [less ▲]

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See detailMDRD Versus CKD_EPI equation to estimate glomerular filtration rate in kidney transplant recipients
masson, Ingrid; Flamant, Martin; Maillard, Nicolas et al

in Transplantation (2013), 95(10),

Background. The new Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) creatinine-based equation was developed to address the systematic underestimation of the glomerular filtration rate (GFR) by ... [more ▼]

Background. The new Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) creatinine-based equation was developed to address the systematic underestimation of the glomerular filtration rate (GFR) by the Modification of Diet in Renal Disease (MDRD) Study equation in patients with a relatively well-preserved kidney function. The performance of the new equation for kidney transplant recipients is discussed. Methods. We analyzed the performances of the CKD-EPI equation in comparison with the MDRD Study equation in 825 stable kidney transplant recipients. Bias, precision, and accuracy within 30% of true GFR were determined. GFR was measured by urinary clearance of inulin (n=488) and plasma clearance of 51Cr-EDTA (n=337). Results. Mean measured GFR (mGFR) was 50T19 mL/min/1.73 m2. On the whole cohort, bias was significantly lower for MDRD Study equation compared with CKD-EPI creatinine. This superiority translates into a better accuracy (80% and 74% for the MDRD and CKD-EPI creatinine, respectively). The best performance of the MDRD Study equation is confirmed both in the subgroups of patients with mGFR G60 mL/min/1.73 m2 and between 60 and 90 mL/min/1.73 m2. For mGFR 990 mL/min/1.73 m2, there were no significant differences between the two equations in terms of performance. Conclusions. The CKD-EPI creatinine equation does not offer a better GFR prediction in renal transplant patients compared with the MDRD Study equation, even in the earlier CKD stages. [less ▲]

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See detailThree-dimensional orbits of the triple-O stellar system HD 150136
Sana, H.; Le Bouquin, J.-B.; Mahy, Laurent et al

in Astronomy and Astrophysics (2013), 553

Context. HD 150136 is a triple hierarchical system and a non-thermal radio emitter. It is formed by an O3-3.5 V + O5.5-6 V close binary and a more distant O6.5-7 V tertiary. So far, only the inner orbital ... [more ▼]

Context. HD 150136 is a triple hierarchical system and a non-thermal radio emitter. It is formed by an O3-3.5 V + O5.5-6 V close binary and a more distant O6.5-7 V tertiary. So far, only the inner orbital properties have been reliably constrained. Aims. To quantitatively understand the non-thermal emission process, accurate knowledge of the physical and orbital properties of the object is crucial. Here, we aim to investigate the orbital properties of the wide system and to constrain the inclinations of the inner and outer binaries, and with these the absolute masses of the system components. Methods. We used the PIONIER combiner at the Very Large Telescope Interferometer to obtain the very first interferometric measurements of HD 150136. We combined the interferometric observations with new and existing high resolution spectroscopic data to derive the orbital solution of the outer companion in the three-dimensional space. Results. The wide system is clearly resolved by PIONIER, with a projected separation on the plane of the sky of about 9 milli-arcsec. The best-fit orbital period, eccentricity, and inclination are 8.2 yr, 0.73 and 108 degr. We constrain the masses of the three stars of the system to 63 +/- 10, 40 +/- 6, and 33 +/- 12 Msun for the O3-3.5 V, O5.5-6 V and O6.5-7 V components. Conclusions. The dynamical masses agree within errors with the evolutionary masses of the components. Future interferometric and spectroscopic monitoring of HD 150136 should allow one to reduce the uncertainties to a few per cent only and to accurately constrain the distance to the system. This makes HD 150136 an ideal system to quantitatively test evolutionary models of high-mass stars as well as the physics of non-thermal processes occurring in O-type systems. [less ▲]

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See detailRapid loss of firn pore space accelerates 21st century Greenland mass loss
van Angelen, J.; Lenaerts, J.; van den Broeke, M. et al

in Geophysical Research Letters (2013), 40

Mass loss from the two major ice sheets and their contribution to global sea level rise is accelerating. In Antarctica, mass loss is dominated by increased flow velocities of outlet glaciers, following ... [more ▼]

Mass loss from the two major ice sheets and their contribution to global sea level rise is accelerating. In Antarctica, mass loss is dominated by increased flow velocities of outlet glaciers, following the thinning or disintegration of coastal ice shelves into which they flow. In contrast, ∼55% of post‒1992 Greenland ice sheet (GrIS) mass loss is accounted for by surface processes, notably increased meltwater runoff. A subtle process in the surface mass balance of the GrIS is the retention and refreezing of meltwater, currently preventing ∼40% of the meltwater to reach the ocean. Here we force a high‒resolution atmosphere/snow model with a mid‒range warming scenario (RCP4.5, 1970–2100), to show that rapid loss of firn pore space, by >50% at the end of the 21st century, quickly reduces this refreezing buffer. As a result, GrIS surface mass loss accelerates throughout the 21st century and its contribution to global sea level rise increases to 1.7 ±0.5 mm yr−1, more than four times the current value. [less ▲]

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See detailFunction of the Chloroplast Hydrogenase in the Microalga Chlamydomonas: The Role of Hydrogenase and State Transitions during Photosynthetic Activation in Anaerobiosis
Ghysels, Bart ULg; Godaux, Damien ULg; Matagne, René-Fernand ULg et al

in PLoS ONE (2013), 8(5), 64161

Like a majority of photosynthetic microorganisms, the green unicellular alga Chlamydomonas reinhardtii may encounter O2 deprived conditions on a regular basis. In response to anaerobiosis or in a ... [more ▼]

Like a majority of photosynthetic microorganisms, the green unicellular alga Chlamydomonas reinhardtii may encounter O2 deprived conditions on a regular basis. In response to anaerobiosis or in a respiration defective context, the photosynthetic electron transport chain of Chlamydomonas is remodeled by a state transition process to a conformation that favours the photoproduction of ATP at the expense of reductant synthesis. In some unicellular green algae including Chlamydomonas, anoxia also triggers the induction of a chloroplast-located, oxygen sensitive hydrogenase, which accepts electrons from reduced ferredoxin to convert protons into molecular hydrogen. Although microalgal hydrogen evolution has received much interest for its biotechnological potential, its physiological role remains unclear. By using specific Chlamydomonas mutants, we demonstrate that the state transition ability and the hydrogenase function are both critical for induction of photosynthesis in anoxia. These two processes are thus important for survival of the cells when they are transiently placed in an anaerobic environment. [less ▲]

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See detailCOSMOGRAIL XIII: Time delays and 9-yr optical monitoring of the lensed quasar RX J1131-1231
Tewes, M.; Courbin, F.; Meylan, G. et al

in Astronomy and Astrophysics (2013)

We present the results from 9 years of optically monitoring the gravitationally lensed z=0.658 quasar RX J1131-1231. The R band light curves of the 4 individual images of the quasar are obtained using ... [more ▼]

We present the results from 9 years of optically monitoring the gravitationally lensed z=0.658 quasar RX J1131-1231. The R band light curves of the 4 individual images of the quasar are obtained using deconvolution photometry, for a total of 707 epochs. Several sharp quasar variability features strongly constrain the time delays between the quasar images. Using three different numerical techniques, we measure these delays for all possible pairs of quasar images, while always processing the 4 light curves simultaneously. For all three methods, the delays between the 3 close images A, B and C are compatible with being 0, while we measure the delay of image D to be 91 days, with a fractional uncertainty of 1.5% (1 sigma), including systematic errors. Our analysis of random and systematic errors accounts in a realistic way for the observed quasar variability, fluctuating microlensing magnification over a broad range of temporal scales, noise properties, and seasonal gaps. Finally, we find that our time delay measurement methods yield compatible results when applied to subsets of the data. [less ▲]

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See detailCOSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses: XII. Time delays of the doubly lensed quasars SDSS~J1206+4332 and HS~2209+1914
Eulaers, Eva ULg; Tewes, Malte; Magain, Pierre ULg et al

in Astronomy and Astrophysics (2013)

Aims. Within the framework of the COSMOGRAIL collaboration we present 7- and 8.5-year-long light curves and time-delay esti- mates for two gravitationally lensed quasars: SDSS J1206+4332 and HS 2209+1914 ... [more ▼]

Aims. Within the framework of the COSMOGRAIL collaboration we present 7- and 8.5-year-long light curves and time-delay esti- mates for two gravitationally lensed quasars: SDSS J1206+4332 and HS 2209+1914. Methods. We monitored these doubly lensed quasars in the R-band using four telescopes: the Mercator, Maidanak, Himalayan Chandra, and Euler Telescopes, together spanning a period of 7 to 8.5 observing seasons from mid-2004 to mid-2011. The pho- tometry of the quasar images was obtained through simultaneous deconvolution of these data. The time delays were determined from these resulting light curves using four very different techniques: a dispersion method, a spline fit, a regression difference technique, and a numerical model fit. This minimizes the bias that might be introduced by the use of a single method. Results. The time delay for SDSS J1206+4332 is ∆tAB = 111.3 ± 3 days with A leading B, confirming a previously published result within the error bars. For HS 2209+1914 we present a new time delay of ∆tBA = 20.0 ± 5 days with B leading A. Conclusions. The combination of data from up to four telescopes have led to well-sampled and nearly 9-season-long light curves, which were necessary to obtain these results, especially for the compact doubly lensed quasar HS 2209+1914. [less ▲]

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See detailMOA-2010-BLG-311: A planetary candidate below the threshold of reliable detection
Yee, J. C.; Hung, L.-W.; Bond, I. A. et al

in Astrophysical Journal (2013), 769(1), 77

We analyze MOA-2010-BLG-311, a high magnification (A_max>600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a ... [more ▼]

We analyze MOA-2010-BLG-311, a high magnification (A_max>600) microlensing event with complete data coverage over the peak, making it very sensitive to planetary signals. We fit this event with both a point lens and a 2-body lens model and find that the 2-body lens model is a better fit but with only Delta chi^2~140. The preferred mass ratio between the lens star and its companion is $q=10^(-3.7+/-0.1), placing the candidate companion in the planetary regime. Despite the formal significance of the planet, we show that because of systematics in the data the evidence for a planetary companion to the lens is too tenuous to claim a secure detection. When combined with analyses of other high-magnification events, this event helps empirically define the threshold for reliable planet detection in high-magnification events, which remains an open question. [less ▲]

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See detailThe "Pragmatic Collective Interest" as the Product of Civic Deliberation: The Case of Pesticide Management in Belgium
Melard, François ULg; Mormont, Marc ULg

in Sustainability (2013), 5(5), 2233-2251

Through the issue of pesticide management in Belgium, this article offers an empirical and conceptual grasp on what Ulrich Beck called the second-order reflexive modernity; that which is exercised among ... [more ▼]

Through the issue of pesticide management in Belgium, this article offers an empirical and conceptual grasp on what Ulrich Beck called the second-order reflexive modernity; that which is exercised among citizens when they are confronted with threatening and uncertain situations. To achieve this, we use two case studies of two public policy instruments, which we offer to the public for discussion: food product labelling, and the modelling of toxic effects linked to pesticide use. To this end, we organised two focus groups designed to encourage discussion, composed of citizens/practitioners. The results obtained plead in favour of a collective deconstruction-reconstruction of these tools and can lead to what we propose calling a “pragmatic collective interest.” This “pragmatic collective interest” can take the form of a new set-up or new associations that enable the coexistence of conflicting propositions and points of view, and a suspension of efforts to hierarchize causes and required solutions. [less ▲]

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See detailLaboratory demonstration of a mid-infrared AGPM vector vortex coronagraph
Delacroix, Christian ULg; Absil, Olivier ULg; Forsberg, Pontus et al

in Astronomy and Astrophysics (2013), 553

Coronagraphy is a powerful technique to achieve high contrast imaging and hence to image faint companions around bright targets. Various concepts have been used in the visible and near-infrared regimes ... [more ▼]

Coronagraphy is a powerful technique to achieve high contrast imaging and hence to image faint companions around bright targets. Various concepts have been used in the visible and near-infrared regimes, while coronagraphic applications in the mid-infrared remain nowadays largely unexplored. Vector vortex phase masks based on concentric subwavelength gratings show great promise for such applications. We aim at producing and validating the first high-performance broadband focal plane phase mask coronagraphs for applications in the mid-infrared regime, and in particular the L band with a fractional bandwidth of ~16% (3.5-4.1 \mu m). Based on rigorous coupled wave analysis, we designed an annular groove phase mask (AGPM) producing a vortex effect in the L band, and etched it onto a series of diamond substrates. The grating parameters were measured by means of scanning electron microscopy. The resulting components were then tested on a mid-infrared coronagraphic test bench. A broadband raw null depth of 2 x 10^{-3} was obtained for our best L-band AGPM after only a few iterations between design and manufacturing. This corresponds to a raw contrast of about 6 x 10^{-5} (10.5 mag) at 2\lambda/D. This result is fully in line with our projections based on rigorous coupled wave analysis modeling, using the measured grating parameters. The sensitivity to tilt and focus has also been evaluated. After years of technological developments, mid-infrared vector vortex coronagraphs finally become a reality and live up to our expectations. Based on their measured performance, our L-band AGPMs are now ready to open a new parameter space in exoplanet imaging at major ground-based observatories. [less ▲]

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See detailA basal thunnosaurian from Iraq reveals disparate phylogenetic origins for Cretaceous ichthyosaurs
Fischer, Valentin ULg; Appleby, Robert; Naish, Darren et al

in Biology Letters (2013), 9(20130021), 1-6

Cretaceous ichthyosaurs have typically been considered a small, homogeneous assemblage sharing a common Late Jurassic ancestor. Their low diversity and disparity have been interpreted as indicative of a ... [more ▼]

Cretaceous ichthyosaurs have typically been considered a small, homogeneous assemblage sharing a common Late Jurassic ancestor. Their low diversity and disparity have been interpreted as indicative of a decline leading to their Cenomanian extinction. We describe the first post-Triassic ichthyosaur from the Middle East, Malawania anachronus gen. et sp. nov. from the Early Cretaceous of Iraq, and re-evaluate the evolutionary history of parvipelvian ichthyosaurs via phylogenetic and cladogenesis rate analyses. Malawania represents a basal grade in thunnosaurian evolution that arose during a major Late Triassic radiation event and was previously thought to have gone extinct during the Early Jurassic. Its pectoral morphology appears surprisingly archaic, retaining a forefin architecture similar to that of its Early Jurassic relatives. After the initial latest Triassic radiation of early thunnosaurians, two subsequent large radiations produced lineages with Cretaceous representatives, but the radiation events themselves are pre-Cretaceous. Cretaceous ichthyosaurs therefore include distantly related lineages, with contrasting evolutionary histories, and appear more diverse and disparate than previously supposed. [less ▲]

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See detailSurface activity of a fluorinated carbohydrate ester in water/carbon dioxide emulsions
Favrelle, Audrey; Boyère, Cédric ULg; Tran, Kien My et al

in Journal of Colloid & Interface Science (2013), 398

The water/carbon dioxide (W/CO2) interfacial activity and emulsifying capacity of hydrocarbon and fluorinated carbohydrate esters are investigated of the first time and compared to the performance of ... [more ▼]

The water/carbon dioxide (W/CO2) interfacial activity and emulsifying capacity of hydrocarbon and fluorinated carbohydrate esters are investigated of the first time and compared to the performance of sodium-bis(2-ethylhexyl)sulfosuccinate (AOT). The reduction of the W/CO2 interfacial tension was measured using a pendant drop tensiometer equipped with a cell view pressurized with CO2 at 80 bar and 45 °C. It was found that the interface stabilization improved in the order AOT < 6-O-myristoyl mannose < 6-O-(2H,2H,3H,3H-perfluoroundecanoyl)-D-mannose. In the latter case, a drastic reduction of the W/CO2 interfacial tension was observed (85% reduction, interfacial tension at the equilibrium = 3.6 mN/m), which emphasizes the advantage of using a fluorinated CO2-philic tail and the potential of sugars as hydrophilic head. The formulation of stable W/CO2 emulsions was also achieved using the fluorinated mannose derivative. This study paves the way to the design of a novel class of competitive surface active agents for W/CO2 emulsions. [less ▲]

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See detailNonimaging achromatic shaped Fresnel lenses for ultrahigh solar concentration
Languy, Fabian ULg; Habraken, Serge ULg

in Optics Letters (2013), 38(10), 1730-1732

The maximum concentration ratio achievable with a solar concentrator made of a single refractive primary optics is much more limited by the chromatic aberration than by any other aberration. Therefore ... [more ▼]

The maximum concentration ratio achievable with a solar concentrator made of a single refractive primary optics is much more limited by the chromatic aberration than by any other aberration. Therefore achromatic doublets made with poly(methyl methacrylate) and polycarbonate are of great interest to enhance the concentration ratio and to achieve a spectrally uniform flux on the receiver. In this Letter, shaped achromatic Fresnel lenses are investigated. One lossless design is of high interest since it provides spectrally and spatially uniform flux without being affected by soiling problems. With this design an optical concentration ratio of about 8500× can be achieved. [less ▲]

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See detailDesign of a small-scale organic Rankine cycle engine used in a solar power plant
Georges, Emeline ULg; Declaye, Sébastien ULg; Dumont, Olivier ULg et al

in International Journal of Low Carbon Technologies (2013)

Under the economic and political pressure due to the depletion of fossil fuels and global warming concerns, it is necessary to develop more sustainable techniques to provide electrical power. In this ... [more ▼]

Under the economic and political pressure due to the depletion of fossil fuels and global warming concerns, it is necessary to develop more sustainable techniques to provide electrical power. In this context, the present study aims at designing, building and testing a small-scale organic Rankine cycle (ORC) solar power plant ( 3 kWe) in order to define and optimize control strategies that could be applied to larger systems. This paper presents a first step of the design of the solar power plant and focuses more specifically on the ORC engine. This design is defined on the basis of simulation models of the ORC engine and takes into account some technical limitations such as the allowed operating ranges and the technical maturity of the components. The final configuration includes a diaphragm pump, two plate heat exchangers for the regenerator and the evaporator, an air-cooled condenser, two hermetic scroll expanders in series and R245fa as the working fluid. Simulations indicate that an efficiency close to 12% for the ORC engine can be reached for evaporating and condensing temperatures of 140 and 358C, respectively. [less ▲]

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See detailParasitic interference in nulling interferometry
Matter, A.; Defrère, D.; Danchi, W. C. et al

in Monthly Notices of the Royal Astronomical Society (2013), 431(2), 1286-1295

Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line of sight so that the stellar flux is rejected, while the ... [more ▼]

Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line of sight so that the stellar flux is rejected, while the flux of the off-axis source can be transmitted. In practice, various instrumental perturbations can degrade the nulling performance. Any imperfection in phase, amplitude or polarization produces a spurious flux that leaks to the interferometer output and corrupts the transmitted off-axis flux. One of these instrumental perturbations is the crosstalk phenomenon, which occurs because of multiple parasitic reflections inside transmitting optics, and/or diffraction effects related to beam propagation along finite size optics. It can include a crosstalk of a beam with itself, and a mutual crosstalk between different beams. This can create a parasitic interference pattern, which degrades the intrinsic transmission map - or intensity response - of the interferometer. In this context, we describe how this instrumental effect impairs the performance of a Bracewell interferometer. A simple formalism is developed to derive the corresponding modified intensity response of the interferometer, as a function of the two parameters of interest: the crosstalk level (or contamination rate) and the phase shift between the primary and secondary - parasitic - beams. We then apply our mathematical approach to a few scientific cases, both analytically and using the GENIESIM simulation software, adapted to handle coherent crosstalk. Our results show that a coherent crosstalk level of about 1 per cent implies a 20 per cent drop of the signal-to-noise ratio at most. Careful attention should thus be paid to reduce the crosstalk level inside an interferometric instrument and ensure an instrumental stability that provides the necessary sensitivity through calibration procedures. [less ▲]

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See detailUse of Front-Face Fluorescence Spectroscopy to Differentiate Sheep Milks from Different Genotypes and Feeding Systems
Hammami, Moncef; Dridi, sami; Zaïdi, Fethi et al

in International Journal of Food Properties (2013), 16(Issue 6),

The objective of the present study was to assess the potential of front-face fluorescence spectroscopy coupled with chemometric tools for the evaluation of the quality of milk samples according to the ... [more ▼]

The objective of the present study was to assess the potential of front-face fluorescence spectroscopy coupled with chemometric tools for the evaluation of the quality of milk samples according to the feeding system and genotype. Fifty (n = 50) ewe's milk samples were scanned after excitation set at 250, 290, 322, and 380 nm and emission set at 410 nm. Thirty out of the 50 samples composed the first trial and were obtained from two different genotypes (i.e., Comisana versus Sicilo-Sarde); the second trial was composed of 20 samples obtained from the Sicilo-Sarde genotype with two different feeding systems in pen (soybean versus scotch bean). Milk samples were divided into four groups named Sicilo-Sarde with pasture feeding (Spas), Comisana with pasture feeding (Cpas), Sicilo-Sarde feeding on scotch bean (Ssco), and Sicilo-Sarde feeding on soybean (Ssoy). The factorial discriminant analysis was applied to the: (i) four groups (i.e., Spas, Ssco, Ssoy, and Cpas) and (ii) three groups composed only of Sicilo-Sarde genotype (i.e., Spas, Ssco, and Ssoy). Considering the four groups, the best result was obtained with the excitation vitamin A spectra since correct classification amounting to 76% was observed. When the factorial discriminant analysis was performed with the three groups belonging to the Sicilo-Sarde genotype, the best result was obtained again with vitamin A spectra (i.e., emission and excitation spectra) since 88.6% of correct classification was observed. Concatenation technique applied to the five fluorescence spectra improved the rate of classification between the four groups since 44 out of 50 samples were correctly classified. No misclassification was observed between milk samples collected from ewes with pasture feeding from the pen feeding. It was concluded from the obtained results that fluorescence spectroscopy could be considered as a powerful tool for differentiating between raw milks according to both genotype and feeding system. [less ▲]

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See detailPreclinical radiation dosimetry for the novel SV2A radiotracer [18F]UCB-H
Bretin, Florian ULg; Warnock, Geoffrey; Bahri, Mohamed Ali ULg et al

in European Journal of Nuclear Medicine and Molecular Imaging Research (2013), 3(1), 35

Background: [18F]UCB-H was developed as a novel radiotracer with a high affinity for synaptic vesicle protein 2A, the binding site for the antiepileptic levetiracetam. The objectives of this study were to ... [more ▼]

Background: [18F]UCB-H was developed as a novel radiotracer with a high affinity for synaptic vesicle protein 2A, the binding site for the antiepileptic levetiracetam. The objectives of this study were to evaluate the radiation dosimetry of [18F]UCB-H in a preclinical trial and to determine the maximum injectable dose according to guidelines for human biomedical research. The radiation dosimetry was derived by organ harvesting and dynamic micro positron emission tomography (PET) imaging in mice, and the results of both methods were compared. Methods: Twenty-four male C57BL-6 mice were injected with 6.96 ± 0.81 MBq of [18F]UCB-H, and the biodistribution was determined by organ harvesting at 2, 5, 10, 30, 60, and 120 min (n = 4 for each time point). Dynamic microPET imaging was performed on five male C57BL-6 mice after the injection of 9.19 ± 3.40 MBq of [18F]UCB-H. A theoretical dynamic bladder model was applied to simulate urinary excretion. Human radiation dose estimates were derived from animal data using the International Commission on Radiological Protection 103 tissue weighting factors. Results: Based on organ harvesting, the urinary bladder wall, liver and brain received the highest radiation dose with a resulting effective dose of 1.88E-02 mSv/MBq. Based on dynamic imaging an effective dose of 1.86E-02 mSv/MBq was calculated, with the urinary bladder wall and liver (brain was not in the imaging field of view) receiving the highest radiation. Conclusions: This first preclinical dosimetry study of [18F]UCB-H showed that the tracer meets the standard criteria for radiation exposure in clinical studies. The dose-limiting organ based on US Food and Drug Administration (FDA) and European guidelines was the urinary bladder wall for FDA and the effective dose for Europe with a maximum injectable single dose of approximately 325 MBq was calculated. Although microPET imaging showed significant deviations from organ harvesting, the Pearson’s correlation coefficient between radiation dosimetry derived by either method was 0.9666. [less ▲]

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See detailInfluence of swimming strategy on microorganism separation by asymmetric obstacles
Berdakin, I; Jeyaram, Y.; Moshchalkov, V.V. et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2013), 87

It has been shown that a nanoliter chamber separated by a wall of asymmetric obstacles can lead to an inhomogeneous distribution of self-propelled microorganisms. Although it is well established that this ... [more ▼]

It has been shown that a nanoliter chamber separated by a wall of asymmetric obstacles can lead to an inhomogeneous distribution of self-propelled microorganisms. Although it is well established that this rectification effect arises from the interaction between the swimmers and the noncentrosymmetric pillars, here we demonstrate numerically that its efficiency is strongly dependent on the detailed dynamics of the individual microorganism. In particular, for the case of run-and-tumble dynamics, the distribution of run lengths, the rotational diffusion, and the partial preservation of run orientation memory through a tumble are important factors when computing the rectification efficiency. In addition, we optimize the geometrical dimensions of the asymmetric pillars in order to maximize the swimmer concentration and we illustrate how it can be used for sorting by swimming strategy in a long array of parallel obstacles. [less ▲]

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See detailIn vitro micropropagation of Jatropha curcas L. from bud aggregates
Medza Mve, Samson Daudet ULg; Mergeai, Guy ULg; Druart, Phillipe et al

in Journal of Technology Innovations in Renewable Energy (2013), 2

Entire plants were regenerated from nodes explants of Jatropha curcas L. following a procedure of bud aggregate induction on MS (Murashige and Skoog) medium supplemented with 25 mg.l-1 citric acid, 12.2 ... [more ▼]

Entire plants were regenerated from nodes explants of Jatropha curcas L. following a procedure of bud aggregate induction on MS (Murashige and Skoog) medium supplemented with 25 mg.l-1 citric acid, 12.2 mg.l-1 adenine sulfate, 15 mg.l-1 L-arginine, 2.46 µM IBA (indole-3-butyric acid), 30 g.l-1 sucrose and 7 g.l-1 of agar, and enriched with different balances of BA (benzyladenine) and L glutamine. The histological studies performed on aggregates showed that the buds result from both the development of axillary buds and adventitious budding starting from underlying tissues of the explant. The culture medium containing 6.65 µM BA and 25 mg.l 1 L-glutamine gave the best results with an average of 64 buds per aggregate after three weeks for all accessions tested. The buds developed into shoots when placed in a MS medium supplemented with 2.21 µM BA, 5.70 µM IAA (indole-3-acetic acid) and 15 mg.l-1 L arginine. These shoots were isolated and then rooted in MS containing 2.46 µM of IBA, 2% sucrose and 0.7% agar. The entire process took 13 weeks with a 98% survival rate in terms of plantlets acclimatization. We obtained a multiplication rate of 13 buds per explant and per subculture which is the double of those obtained in other recent works based on the micropropagation of J. curcas from node explants. This protocol is economically more profitable. [less ▲]

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See detailEMCCD photometry reveals two new variable stars in the crowded central region of the globular cluster NGC 6981
Skottfelt, J.; Bramich, D. M.; Figuera Jaimes, R. et al

in Astronomy and Astrophysics (2013), 553

Two previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the ... [more ▼]

Two previously unknown variable stars in the crowded central region of the globular cluster NGC 6981 are presented. The observations were made using the electron multiplying CCD (EMCCD) camera at the Danish 1.54 m Telescope at La Silla, Chile. The two variableswere not previously detected by conventional CCD imaging because of their proximity to a bright star. This discovery demonstrates that EMCCDs are a powerful tool for performing high-precision time-series photometry in crowded fields and near bright stars, especially when combined with difference image analysis. Based on data collected by MiNDSTEp with the Danish 1.54 m telescope. [less ▲]

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