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See detailHubble observations of Jupiter’s north–south conjugate ultraviolet aurora
Gérard, Jean-Claude ULg; Grodent, Denis ULg; Radioti, Aikaterini ULg et al

in Icarus (2013), 226

Comparisons of the northern and southern far ultraviolet (UV) auroral emissions of Jupiter from the Hubble Space Telescope (HST) or any other ultraviolet imager have mostly been made so far on a ... [more ▼]

Comparisons of the northern and southern far ultraviolet (UV) auroral emissions of Jupiter from the Hubble Space Telescope (HST) or any other ultraviolet imager have mostly been made so far on a statistical basis or were not obtained with high sensitivity and resolution. Such observations are important to discriminate between different mechanisms responsible for the electron acceleration of the different components of the aurora such as the satellite footprints, the «main oval» or the polar emissions. The field of view of the ACS and STIS cameras on board HST is not wide enough to provide images of the full jovian disk. We thus compare the morphology of the north and south aurora observed 55 min apart and we point out similarities and differences. On one occasion HST pointed successively the two polar regions and auroral images were seen separated by only 3 min. This makes it possible to compare the emission structure and the emitted FUV power of corresponding regions. We find that most morphological features identified in one hemisphere have a conjugate counterpart in the other hemisphere. However, the power associated with conjugate regions of the main oval, diffuse or discrete equatoward emission observed quasi-simultaneously may be different in the two hemispheres. It is not directly nor inversely proportional to the strength of the B-field as one might expect for diffuse precipitation or field-aligned acceleration with equal ionospheric electron density in both hemispheres. Finally, the lack of symmetry of some polar emissions suggests that some of them could be located on open magnetic field lines. [less ▲]

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See detailThe Reputation Effect: A Case Study of Credit Contracts in Transition Countries
Artige, Lionel ULg; Nicolini, Rosella

in SSRN Working Paper (2013)

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See detailRécit et interactivité : typologie des interactions narratives
Hurel, Pierre-Yves ULg

in Mosaïque (2013), 10

The aim of this article is to provide a first typology of structural elements of storytelling that can be used for narrative interactivy; we define it as the possibilities for the user of a interactive ... [more ▼]

The aim of this article is to provide a first typology of structural elements of storytelling that can be used for narrative interactivy; we define it as the possibilities for the user of a interactive storytelling to influence the story developments. Furthermore, we will also discuss the links between narrative interactivity and other types of interactions. Our approach is a problematic of involvment (that we oppose to the concept of participation), which allows us to stress the continuity between the reception (too often thought of as passive) and interaction itself. The typology is built on the basis of Françoise Revaz's definition of narrativity degrees. The article ends with a first application through a descriptive analysis of three video games and a web documentary. [less ▲]

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See detailLa virothérapie oncolytique médiée par le virus de la myxomatose
Krygier, David; Gillet, Laurent ULg; Marlier, Didier ULg

in Annales de Médecine Vétérinaire (2013), 157(1), 5-14

Le virus de la myxomatose est un poxvirus du genre Leporipoxvirus qui induit une pathologie spécifique, la myxomatose, chez le lapin européen (Oryctolagus cuniculus). Ce virus a la particularité d’être ... [more ▼]

Le virus de la myxomatose est un poxvirus du genre Leporipoxvirus qui induit une pathologie spécifique, la myxomatose, chez le lapin européen (Oryctolagus cuniculus). Ce virus a la particularité d’être non pathogène pour les autres espèces de vertébrés y compris l’homme. Le virus de la myxomatose (MYXV) présente aussi, de manière inattendue, un tropisme pour les cellules cancéreuses humaines in vitro ainsi qu’un potentiel oncolytique in vivo. La tolérance de ces cellules au MYXV est intimement liée au niveau intracellulaire d’Akt phosphorylée. Cette enzyme, est une serine/thréonine protéine kinase qui joue un rôle essentiel dans de nombreux processus cellulaires et fait partie de la voie de signalisation PI3k/Akt/mTOR (mammalian target of rapamycin), fréquemment amplifiée par l’oncogénèse. La protéine virale à répétitions ankyrines, M-T5, interagit avec Akt ce qui module le tropisme du MYXV pour les cellules tumorales humaines. Un régulateur de la croissance cellulaire et du métabolisme situé en aval d’Akt, mTOR, est spécifiquement inhibé par la rapamycine. Ainsi, l’utilisation de la rapamycine en combinaison avec le MYXV permet d’augmenter la concentration d’Akt phosphorylée, et par conséquent, d’amplifier l’oncolyse. Un meilleur contrôle chimique de la voie de signalisation d’Akt ou de la modification génétique de son génome constituera une étape décisive pour que le MYXV devienne l’un des nouveaux traitements des cancers chez l’homme [less ▲]

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See detailLe grand écart des Belgo-Congolais (entretien)
Demart, Sarah ULg

in Migrations Magazine (2013), 11(Autumn),

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See detailSedimentary development of a continuous Middle Devonian to Mississippian section from the fore-reef fringe of the Brilon Reef Complex (Rheinisches Scheifergebirge, germany)
Pas, Damien ULg; Da Silva, Anne-Christine ULg; Cornet, Pierre et al

in Facies (2013), 59

The Brilon-reef complex is one of the biggest Devonian carbonate buildups (~80 km²) of the Rheinisches Schiefergebirge. The Burgberg section is located in the south-eastern fore-reef area of the Brilon ... [more ▼]

The Brilon-reef complex is one of the biggest Devonian carbonate buildups (~80 km²) of the Rheinisches Schiefergebirge. The Burgberg section is located in the south-eastern fore-reef area of the Brilon reef-complex and exposes a succession of strata (117 m thick) which extend from the Middle Givetian (middle varcus conodont Zone) to the Viséan (bilineatus conodont Zone). Field and microfacies observations led to the definition of nine microfacies which are integrated into a sedimentary model divided into off-reef, intermediate fore-reef and proximal fore-reef sedimentary domains (SD). The off-reef domain (SD1) is the most distal setting observed and is characterized by fine-grained sediments, dominated by pelagic biota and the local occurrence of gravity-flow deposits. The intermediate fore-reef (SD2) is characterized by a mixture of biota and sediments coming from both, deeper-water and shallow-water sources and is influenced by storm and gravity-flow currents. In this domain Renalcis mound-like structures developed locally. Finally, the proximal fore-reef (SD3) corresponds to the most proximal setting which is strongly influenced by gravity-flow currents derived from the Brilon reef-complex. The temporal evolution of microfacies in the fore-reef setting of the Burgberg section show five main palaeoenvironmental trends influenced by the onset, general development, and demise/drowning of the Brilon reef-complex. Fore-reef to off-reef lithologies and their temporal changes are from the base to the top of the section: (U1) - fine-grained sediments with large reef debris, corresponding to the initial development of the reef building upon submarine volcanoclastic deposits during the Middle Givetian (middle varcus Zone) and first export of reef debris in the fore-reef setting; (U2) - high increase of reef-derived material in the fore-reef area, corresponding to a significant progradation of the reef from the Middle Givetian to the Early Frasnian (maximum extension of the Brilon reef-complex to the south, disparilis to the falsiovalis conodont biozones); (U3) - progressive decrease of shallow-water derived material and increase of fine-grained sediments and deep-water biota into the fore-reef setting, corresponding to the stepwise withdrawal of the reef influence; from the Middle to the Late Frasnian (jamieae conodont Zone); (U4) - development of a submarine rise characterized by nodular and cephalopod-bearing limestones extending from the Late Frasnian to the Late Famennian corresponding to the demise and drowning of the Brilon reef-complex as a result of the Late Frasnian Kellwasser events (upper rhenana and triangularis conodont biozones); (U5) - significant deepening of the Burgberg area starting in the Late Famennian, directly followed by an aggrading trend marked by pelagic shales overlying the nodular limestone deposits. [less ▲]

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See detailGAIMS: A Reliable Non-Intrusive Gait Measuring System
Pierard, Sébastien ULg; Azrour, Samir ULg; PHAN BA, Remy ULg et al

in ERCIM News (2013), 95

Gait observation and analysis can provide invaluable information about an individual [1]. Studies that have interpreted gait using traditional imaging devices have demonstrated that it is difficult to ... [more ▼]

Gait observation and analysis can provide invaluable information about an individual [1]. Studies that have interpreted gait using traditional imaging devices have demonstrated that it is difficult to make reliable measurements with colour cameras. GAIMS, our new system resulting from a multidisciplinary project born from collaboration between engineers and neurologists, aims at developing non-intrusive and reliable tools to provide quantitative measures of gait and interpretations of the acquired data. Following a current trend in imaging, it takes advantage of imaging sensors that measure distance instead of colour. While its principles are general, GAIMS is currently used for the diagnosis of multiple sclerosis (MS) and the continued evaluation of disease progression [2]. It is the first available system to fully satisfy the clinical routine and its associated constraints. [less ▲]

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See detailVertigo's Archival Impulse as Memorious Discourse
Dony, Christophe ULg

in Comics Forum (2013)

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See detailPlant defense stimulation by natural isolates of Bacillus depends on efficient surfactin production
Cawoy, Hélène ULg; Mariutto, Martin; Henry, Guillaume et al

in Molecular Plant-Microbe Interactions [=MPMI] (2013)

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See detailDynamic change of global and local information processing in Propofol-induced loss and recovery of consciousness
Monti, Martin; Lutkenoff, Evan; Rubinov, Mikail et al

in PLoS Computational Biology (2013), 9

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See detailSu Marte ci sono corride. La fantascienza spagnola durante la Restaurazione
Ceballos Viro, Alvaro ULg; Favaro, Alice

in IF. Insolito e Fantastico (2013), 14

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See detailTravail sur Soi et (dé)régulation de l'intervention sociale.
Vrancken, Didier ULg; Brahy, Rachel ULg

in RHIZOME (2013), 49-50(Octobre 2013), 28-29

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See detailStress microbien lors du processus d’extrapolation: Approche physique et biologique
Lejeune, Annick ULg; Thonart, Philippe ULg; Delvigne, Frank ULg

in Cerevisia : Belgian Journal of Brewing and Biotechnology (2013), 38(3), 89-101

Les micro-organismes sont utilisés dans de nombreux domaines (agro-alimentaire, pharmaceutique, environnemental, énergétique,…) que ce soit pour la production de biomasse ou de métabolites particuliers ... [more ▼]

Les micro-organismes sont utilisés dans de nombreux domaines (agro-alimentaire, pharmaceutique, environnemental, énergétique,…) que ce soit pour la production de biomasse ou de métabolites particuliers. Le passage de l’échelle du laboratoire à l’échelle industrielle est souvent problématique car les micro-organismes sont sensibles aux conditions environnementales développées au sein du volume réactionnel. De plus, la perte de l’efficacité d’homogénéisation des bioréacteurs industriels entraîne des perturbations au niveau du métabolisme des cellules. C’est pourquoi il est important d’étudier les conditions hydrodynamiques développées au sein du réacteur. Cet article présente des méthodes de calcul et de modélisation de ces conditions. L’impact de l’hydrodynamique sur le métabolisme microbien peut être étudié par l’utilisation de réacteurs scale-down. Les techniques nouvelles permettant de réaliser un scale-up prennent en compte des caractères physiologiques des cellules, qui estiment l’impact des conditions environnementales sur le métabolisme microbien et donc la bonne réussite du procédé. Enfin, l’étude de Saccharomyces cerevisiae, micro-organisme de grand intérêt biotechnologique, est réalisée. [less ▲]

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See detailLa discussion philosophique en classe : une pratique de l'émancipation ?
Herla, Anne ULg

in Tracés (2013), 25

This paper presents a recent pedagogical practice in the field of philosophy in school: Discussion with Democratic and Philosophical Aim (DDPA). According to the author, this practice differs from a more ... [more ▼]

This paper presents a recent pedagogical practice in the field of philosophy in school: Discussion with Democratic and Philosophical Aim (DDPA). According to the author, this practice differs from a more traditional conception of philosophy teaching by upsetting three key aspects of the pedagogical relationship: the relationship to knowledge, the relationship to the master, the relationship to the group. For each of these aspects, it is to show, on the one hand how authority is questioned and reworked, and secondly how the power relations relayed by the school system are revealed and transformed. More broadly, the author argues that the DDPA in its very practice questions in a new light the nature of the philosophical act and undermines the established partitions between teacher and student, philosopher and non-philosopher, scientist and ignorant. It is in this paper to highlight the concept of emancipation - inseparably intellectual and political - that underlies such a learning device of philosophy. L’article présente une pratique pédagogique récente dans le domaine de la philosophie à l’école : la Discussion à Visée Démocratique et Philosophique. D’après l’auteure, cette pratique se distingue d’une conception plus traditionnelle de l’enseignement de la philosophie en bouleversant trois aspects essentiels de la relation pédagogique : le rapport au savoir, la relation au maître, le rapport au collectif. Pour chacun de ces aspects, il s’agit de montrer, d’une part comment l’autorité est remise en question et réélaborée, et d’autre part comment les rapports de domination relayés par le système scolaire sont dévoilés et transformés. Plus largement, l’auteure avance que la DVDP, dans sa pratique même, interroge sous un angle nouveau la nature de l’acte philosophique et ébranle les partages établis entre maître et élève, philosophe et non-philosophe, savant et ignorant. Il s’agit dans cet article de mettre en lumière la conception de l’émancipation – indissociablement intellectuelle et politique – qui sous-tend un tel dispositif d’apprentissage de la philosophie. [less ▲]

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See detailTechnical and clinical evaluation of the VITROS Immunodiagnostic Products 25-OH Vitamin D Total Assay - comparison with marketed automated immunoassays and a liquid chromatography - tandem mass spectrometry method
CAVALIER, Etienne ULg; ROUSSELLE, Olivier ULg; FERRANTE, Nunzio ULg et al

in Clinical Chemistry & Laboratory Medicine (2013), 51(10), 1983-1989

Background: The study was conducted to evaluate the technical and clinical performance of the VITROS ® Immunodiagnostic Products 25-OH Vitamin D Total Assay, and compare it with the performance of five ... [more ▼]

Background: The study was conducted to evaluate the technical and clinical performance of the VITROS ® Immunodiagnostic Products 25-OH Vitamin D Total Assay, and compare it with the performance of five marketed automated assays and a liquid chromatography/mass spectrometry reference method (LC-MS/MS). Methods: Three hundred patient serum samples were used to compare the correlation of the VITROS ® 25-OH Vitamin D Total Assay with both the other immunoassays and the LC-MS/MS method, using Passing-Bablok regression and Bland-Altman analyses. Concordance of the diagnosis of vitamin D status was calculated to test the agreement between the different assays. In addition, samples containing vitamin D2 were used to test the assay ’ s ability to detect the D2 form of the vitamin. Results and conclusions: These results from the VITROS ® 5-OH Vitamin D Total Assay generally correlated well with those from most of the marketed immunoassays. Cross-reactivity of the D2 form was calculated as being close to 100%. Additionally, we found substantial variability in performance amongst the various assays, which suggests the need for optimisation and recalibration of commercial methods. [less ▲]

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See detailLe syndrome des myoclonies peribuccales avec absences: a propos de 2 cas.
Bourcy, E.; Leroy, Pascal ULg; DUBRU, Jean-Marie ULg

in Revue medicale de Liege (2013), 68(10), 537-41

Perioral myoclonia with absences (POMA) was first described in 1994 by CP Panayotopoulos who identified 6 cases that did not fit with the classical syndrome of absence epilepsy in children and whose ... [more ▼]

Perioral myoclonia with absences (POMA) was first described in 1994 by CP Panayotopoulos who identified 6 cases that did not fit with the classical syndrome of absence epilepsy in children and whose predominant symptom during the absence seizure was the occurrence of myoclonia of perioral muscles. The POMA belongs to the group of generalized idiopathic epilepsies. It begins in childhood and there is a female predominance. It may be accompanied by tonic-clonic generalized seizures as well as absence status epilepticus. It has the EEG characteristics of typical absence seizures and therefore remains currently considered as such. The clinical manifestations of POMA are often misdiagnosed as focal motor seizures. This syndrome can be pharmacoresistant and is not likely to regress spontaneously. We present two clinical observations of perioral myoclonia with absences. The first case illustrates the typical electro-clinical features of this syndrome while the second illustrates its pharmacoresistance. [less ▲]

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See detailIn Vitro Synergy of Polymyxins and Carbapenems: Systematic Review and Meta Analysis.
Zusman, Oren; Avni, Tomer; Leibovici, Leonard et al

in Antimicrobial Agents and Chemotherapy (2013), 57(10), 5104-51011

ObjectivesTo examine the evidence on in-vitro synergy of polymyxin-carbapenem combination therapy against Gram-negative bacteria (GNB)MethodsSystematic review and meta-analysis. All studies examining in ... [more ▼]

ObjectivesTo examine the evidence on in-vitro synergy of polymyxin-carbapenem combination therapy against Gram-negative bacteria (GNB)MethodsSystematic review and meta-analysis. All studies examining in-vitro interactions of antibiotic combinations consisting of any carbapenem with colistin or polymyxin B against any GNB. A broad search was conducted with no language, date or publication status restrictions. Synergy rates, defined as fractional inhibitory concentration index </=0.5 or >2log colony forming unit reduction, were pooled separately for time-kill, checkerboard, and E-test in a mixed-effects meta-analysis of rates. We examined whether synergy rate depended on testing method, type of antibiotic, bacteria and resistance to carbapenems. Pooled rates with 95% confidence intervals are shown.Results39 published studies and 15 conference proceeding were included, reporting on 246 different tests on 1054 bacterial isolates. In time-kill studies, combination therapy showed synergy rates of 77% (95% CI 64-87) for Acinetobacter baumannii, 44% (95% CI 30-59%) for Klebsiella pneumoniae and 50% (95% CI 30-69%) for Pseudomonas aeruginosa with low antagonism rates for all. Doripenem showed high synergy rates for all three bacteria. For A. baumannii, meropenem was more synergistic than imipenem, whereas for P. aeruginosa the opposite was true. Checkerboard and Etest studies generally reported lower synergy rates than time-kill. Use of combination therapy led to less resistance development in-vitro.ConclusionsThe combination of a carbapenem with a polymyxin against GNB, especially A. baumannii, is supported in-vitro by high synergy rates, with low antagonism and less resistance development. These findings should be examined in clinical studies. [less ▲]

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See detailInstitutions and Market Creation: Evidence from the Experience of Transition Countries
Artige, Lionel ULg; Nicolini, Rosella

in SSRN Working Paper (2013)

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See detailModeling the Distribution of Marketable Timber Products of Private Teak (Tectona grandis L.f.) Plantations
Fonton, Noël Houédougbé; Atindogbé, Gilbert; Akossou, Arcadius Y. et al

in Open Journal of Forestry (2013), 3(4), 115-121

Management of marketable products of private plantations will not be sustainable without class girth be-ing identifiable readily. Modeling marketable products is a key to obtain good fitness between ... [more ▼]

Management of marketable products of private plantations will not be sustainable without class girth be-ing identifiable readily. Modeling marketable products is a key to obtain good fitness between observed and theoretical girth distribution. We determine the best parameter recovery method with the Weibull function for two sylvicultural regimes (coppice and high forest). Data on stand variables were collected from 1101 sample plots. The three Weibull function parameters were estimated with three parameters re-covery methods: the maximum likelihood method, the method of moments and the method of percentiles. Stepwise regression and the simultaneously re-estimated parameter using the Seemingly Unrelated Re-gression Estimation were applied to model each parameter. The results indicated that the three methods successfully predicted girth size distributions within the sample stands. The method of moments was the best one with lowest values of Reynolds error index and Kolmogorov-Smirnov statistic however the syl-vicultural regimes. The Weibull parameter distribution model developed for each of the two sylvicultural regimes was quite reliable. [less ▲]

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See detailPerformance evaluation and X-ray dose quantification for various scanning protocols of the GE eXplore 120 micro-CT
Bretin, Florian ULg; Warnock, Geoffrey; Luxen, André ULg et al

in IEEE Transactions on Nuclear Science (2013), 60(5), 3235-3241

The aim of this study was to evaluate the performance of the General Electric eXplore 120 micro-CT regarding image quality and delivered dose of several protocols. Image quality (resolution, linearity ... [more ▼]

The aim of this study was to evaluate the performance of the General Electric eXplore 120 micro-CT regarding image quality and delivered dose of several protocols. Image quality (resolution, linearity, uniformity and geometric accuracy) was assessed using the vmCT phantom developed for the GE eXplore Ultra, the QRM low contrast and the QRM Bar Pattern Phantom. All dose measurements were performed using a mobileMOSFET dose verification system and the CTDI100 and the MSAD were determined with a custom built PMMA phantom. Additionally, in vivo scans in sacrificed rats with different weights were acquired to assess dose, contrast and resolution variation due to X-ray absorption in surrounding tissue. The spatial resolution was determined as between 95 and 138 μm with a geometric accuracy of 0.1%. The system has a highly linear response to the iodine concentrations (0.937 to 30 mg/ml) for all protocols. The calculated CTDI100 ranged from 20.15 to 56.79 mGy and the MSAD from 27.98 to 77.45 mGy. The results were confirmed by in vivo scans in rats with different weights and no impact of body weight on delivered dose could be observed. However, body weight had a slight impact on image contrast and resolution. [less ▲]

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See detailStudy of the sorption behavior of Hibscus sabdariffa anthocyanins on a macroporous resin
Beye, Cheikh ULg; Souk Tounkara, Lat; Destain, Jacqueline ULg et al

in Journal of Food Process Engineering (2013), 36(5), 579-590

The adsorption of Hibiscus sabdariffa sp. anthocyanins onto a macroporous resin was studied in laboratory experiments. The anthocyanin aqueous extracts obtained from the calyces were used in agitated ... [more ▼]

The adsorption of Hibiscus sabdariffa sp. anthocyanins onto a macroporous resin was studied in laboratory experiments. The anthocyanin aqueous extracts obtained from the calyces were used in agitated batch experiments with a macroporous resin. The adsorption kinetics and isotherms of H. sabdariffa anthocyanins on a selected macroporous resin was studied to determine the parameters that have to be optimized to recover the anthocyanins from aqueous extracts of the calyces. The adsorption kinetic experimental data were fit into a pseudo second order kinetic model, which was then used to determine several parameters such as the contact time necessary to reach equilibrium as well as the maximum adsorption capacity. The best fit for the equilibrium adsorption isotherm experimental data was obtained with the Langmuir isotherm model. Based on qualitative and quantitative interpretation of the experimental data, the resin that was tested here appeared to have good adsorption capacity for the anthocyanins even though the necessary time to reach equilibrium was particularly long. Three aspects of the desorption of anthocyanins from the resin were studied: the speed of release of the anthocyanins (desorption kinetics), the extent of the anthocyanin desorption depending on the adsorption contact time and finally, the influence of the mobile phase's characteristics [less ▲]

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See detailLa politique étrangère de l’Italie face aux débuts de la crise congolaise. Pour une histoire des intérêts italiens au Congo dans les années 1960
Genin, Vincent ULg

in Forum Romanum Belgicum. E-Revue de l’Institut Historique Belge de Rome (successeur du Bulletin de L’Institut Historique Belge de Rome) (2013)

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See detailIL-4Ralpha-associated antigen processing by B cells promotes immunity in Nippostrongylus brasiliensis infection.
Horsnell, William G. C.; Darby, Matthew G.; Hoving, Jennifer C. et al

in PLoS pathogens (2013), 9(10), 1003662

In this study, B cell function in protective T(H)2 immunity against N. brasiliensis infection was investigated. Protection against secondary infection depended on IL-4Ralpha and IL-13; but not IL-4 ... [more ▼]

In this study, B cell function in protective T(H)2 immunity against N. brasiliensis infection was investigated. Protection against secondary infection depended on IL-4Ralpha and IL-13; but not IL-4. Protection did not associate with parasite specific antibody responses. Re-infection of B cell-specific IL-4Ralpha(-)/(-) mice resulted in increased worm burdens compared to control mice, despite their equivalent capacity to control primary infection. Impaired protection correlated with reduced lymphocyte IL-13 production and B cell MHC class II and CD86 surface expression. Adoptive transfer of in vivo N. brasiliensis primed IL-4Ralpha expressing B cells into naive BALB/c mice, but not IL-4Ralpha or IL-13 deficient B cells, conferred protection against primary N. brasiliensis infection. This protection required MHC class II compatibility on B cells suggesting cognate interactions by B cells with CD4(+) T cells were important to co-ordinate immunity. Furthermore, the rapid nature of these protective effects by B cells suggested non-BCR mediated mechanisms, such as via Toll Like Receptors, was involved, and this was supported by transfer experiments using antigen pulsed Myd88(-)/(-) B cells. These data suggest TLR dependent antigen processing by IL-4Ralpha-responsive B cells producing IL-13 contribute significantly to CD4(+) T cell-mediated protective immunity against N. brasiliensis infection. [less ▲]

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See detailDesign, Construction and Validation of a Guarded Hot Plate Apparatus for Thermal Conductivity Measurement of High Thickness Crop-Based Specimens
Dubois, Samuel ULg; Lebeau, Frédéric ULg

in Materials and Structures (2013)

The search for sustainability achievement in the building sector led to the use of crop-based insulation materials. Among these, raw products like plant straws bales can present elementary representative ... [more ▼]

The search for sustainability achievement in the building sector led to the use of crop-based insulation materials. Among these, raw products like plant straws bales can present elementary representative volumes (REVs) in the size order of several square centimeters. Fibers orientation may play an important role on material thermal behavior. Measuring their thermal conductivities with standard steady-state equipment can thus lead to some inaccuracies due to the necessity of resetting lower thickness samples. This paper presents a Guarded Hot Plate (GHP) apparatus designed to test high thickness samples, up to 40cm, with an accuracy of 2%. The different parts of the machine are described in details along with design process and challenges encountered. Temperature and heat flux measurements in the device represent critical design stages where optimal accuracy is needed in order to optimize the resulting global error. Regarding this, necessary numerical and experimental analyzes were conducted emphasizing on intrinsic systematic error assessment. To complete the study, some validations tests are performed on a reference material and other widely-spread polystyrene slabs. These tests take into account the optimal computation parameters resulting from the numerical analysis and the apparatus proved to be in accordance with accuracy requirements. [less ▲]

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See detailMobile speckle interferometer in the long-wave infrared for aeronautical nondestructive testing in field conditions
Vandenrijt, Jean-François ULg; Thizy, Cédric ULg; Alexeenko, Igor et al

in Optical Engineering : The Journal of the Society of Photo-Optical Instrumentation Engineers (2013), 52(10),

Abstract We present the development of a speckle interferometer based on CO2 laser and using a thermal infrared camera based on uncooled microbolometer array. It is intended to be used for monitoring ... [more ▼]

Abstract We present the development of a speckle interferometer based on CO2 laser and using a thermal infrared camera based on uncooled microbolometer array. It is intended to be used for monitoring deformations as well as flaw detection in aeronautical composites, with a smaller sensitivity to displacement compared to equivalent system using visible lasers. Moreover the long wavelength allows working with such interferometer under out-of-laboratory conditions. A mobile system has been developed on the basis of previous laboratory developments. Then it is validated in a variety of industrial nondestructive testing applications under field working conditions. [less ▲]

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See detailLes mécanismes de coordination des finances publiques en Belgique dans le cadre e la nouvelle gouvernance budgétaire européenne
Uhoda, Maxime ULg; Bourgeois, Marc ULg; Bayenet, Benoît

in Revue de Fiscalité Régionale et Locale (2013), 3(2013), 206-226

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See detailTransformation of the mitochondrial genome.
Larosa, Véronique ULg; Remacle, Claire ULg

in International Journal of Developmental Biology (2013), 57

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See detailIDS iSYS automated intact procollagen-1-Nterminus pro-peptide assay: method evaluation and reference intervals in adults and children
Morovat, Alireza; Catchpole, Anthony; MEURISSE, Angélique ULg et al

in Clinical Chemistry & Laboratory Medicine (2013), 51(10), 2009-2018

Background: We carried out a technical evaluation of the Immunodiagnostic Systems (IDS) automated intact procollagen- I N-terminus propeptide (PINP) assay on the iSYS platform, and established reference ... [more ▼]

Background: We carried out a technical evaluation of the Immunodiagnostic Systems (IDS) automated intact procollagen- I N-terminus propeptide (PINP) assay on the iSYS platform, and established reference intervals for PINP in both adults and children. Methods: Assay imprecision, recovery and interference were studied. Serum and plasma values were compared, and PINP stability was assessed. Using 828 specimens, IDS iSYS intact PINP and Roche E170 total PINP values were compared. Specimens from 597 adults and 485 children and adolescents were used to establish reference intervals for intact PINP. Results: The method demonstrated good recovery and acceptable imprecision. The assay was unaffected by icterus and lipaemia, but haemolysis decreased measured PINP. Serum and plasma values were comparable. There was a non-linear relation between IDS intact and Roche total PINP values. Pre- and post-menopausal women had comparable PINP values, but there was a difference between women of different age groups. Serum PINP in men showed a decline in young age up to 45 years, but remained steady thereafter. Separate reference intervals were established for four age groups in women and for two age groups in men. Data for children were partitioned into four-year age groups, and these showed PINP to be high with no major gender differences until 12 years of age. Thereafter, values in females decreased in 13–16 years age groups and further in 17–20 years age groups, whereas PINP increased in boys of 13–16 years of age with a subsequent decline at 17–20 years. Conclusions: The IDS iSYS PINP intact assay appears to be reliable. We have established gender- and age-related reference intervals for children and adults based on a relatively large healthy North European population. [less ▲]

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See detailNo serologic evidence for emerging Schmallenberg virus infection in dogs (Canis domesticus)
Garigliany, Mutien-Marie ULg; Desmecht, Daniel ULg; Bayrou, Calixte ULg et al

in Vector Borne & Zoonotic Diseases (2013), 13(11), 1-4

Schmallenberg virus, a novel orthobunyavirus, is spreading among ruminants, especially sheep and cattle throughout Europe. To determine the risk for domestic dog infection, we conducted a survey among ... [more ▼]

Schmallenberg virus, a novel orthobunyavirus, is spreading among ruminants, especially sheep and cattle throughout Europe. To determine the risk for domestic dog infection, we conducted a survey among cases referred to the university Companion Animal Clinic to assess possible seroconversion. No evidence of transmission to dogs was detected. [less ▲]

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See detail« Quoi de neuf pour la prise en charge de l’hypertension artérielle en 2013 ? » Nouvelles directives des Sociétés Européennes d’Hypertension et de Cardiologie.
XHIGNESSE, Patricia ULg; Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2013), 68(10), 511-520

The 2013 guidelines for arterial hypertension have just been released by the European Societies of Cardiology and Hypertension. As already discussed in earlier versions, the decision to treat must be ... [more ▼]

The 2013 guidelines for arterial hypertension have just been released by the European Societies of Cardiology and Hypertension. As already discussed in earlier versions, the decision to treat must be based on the assessment of the cardiovascular risk. The value of out-of-the office blood pressure measurements to confirm the diagnosis of hypertension is underlined and the authors stress the need for a close follow up of non pharmacological therapeutic measures. A novelty, however, consists in the simplification of the blood pressure target under treatment, which must be < 140/90 mmHg in the vast majority of patients, except for octogenerians whose systolic blood pressure target should be < 150 mmHg. For resistant hypertension, renal denervation and carotid baroreceptor stimulation are proposed as new invasive modes of therapy; their clinical values, however, remain to be confirmed. [less ▲]

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See detailA fatal case of Perthes syndrome
JOBE, Jérôme ULg; Ghuysen, Alexandre ULg; Hartstein, Gary ULg et al

in Journal of Emergencies, Trauma and Shock (2013), 6(4), 296-297

Perthes syndrome, or traumatic asphyxia, is a clinical syndrome associating cervicofacial cyanosis with cutaneous petechial haemorrhages and subconjonctival bleeding resulting from severe sudden ... [more ▼]

Perthes syndrome, or traumatic asphyxia, is a clinical syndrome associating cervicofacial cyanosis with cutaneous petechial haemorrhages and subconjonctival bleeding resulting from severe sudden compressive chest trauma. Deep inspiration and a Valsalva maneuver just prior to rapid and severe chest compression, are responsible for the development of this syndrome. Current treatment is symptomatic: urgent relief of chest compression and cardiopulmonary resuscitation if needed. Outcome may be satisfactory depending on the duration and severity of compression. Prolonged thoracic compression may sometimes lead to cerebral anoxia, irreversible neurologic damage and death. We report a fatal case of Perthes syndrome resulting from an industrial accident. [less ▲]

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See detailEmotional intelligence and self-efficacy among physical education teachers
Mouton, Alexandre ULg; Hansenne, Michel ULg; Delcour, Romy et al

in Journal of Teaching in Physical Education (2013), 32(4), 342-354

Research has documented a positive association between Emotional Intelligence (EI) and well-being, performance and self-efficacy. The purpose of the current study was to examine potential associations ... [more ▼]

Research has documented a positive association between Emotional Intelligence (EI) and well-being, performance and self-efficacy. The purpose of the current study was to examine potential associations between EI and self-efficacy among physical education teachers. The Trait Emotional Intelligence Questionnaire (TEIQue) and the Teacher Sense of Efficacy Scale (TSES) were administered to a sample of 119 physical education teachers. The main results show a positive association between EI and self-efficacy, and more particularly that the sociability factor of EI predicted the TSES total score. Moreover, neither age nor teaching time experience was related to EI or self-efficacy scores. These results both confirm and extend previous findings on the association between EI and self-efficacy. Suggestions are provided for specific EI training for physical education teachers. [less ▲]

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See detailA rich internet application for remote visualization and collaborative annotation of digital slide images in histology and cytology
Marée, Raphaël ULg; Stevens, Benjamin ULg; Rollus, Loïc ULg et al

in Diagnostic Pathology (2013), 8(S1), 26

This work proposes a new web-based tool to ease collaborative projects in digital histology and cytology.

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See detailAerial surveys using an Unmanned Aerial System (UAS): comparison of different methods for estimating the surface area of sampling strips
Lisein, Jonathan ULg; Linchant, Julie ULg; Lejeune, Philippe ULg et al

in Tropical Conservation Science (2013), 6(4), 506-520

Conservation of natural ecosystems requires regular monitoring of biodiversity, including the estimation of wildlife density. Recently, unmanned aerial systems (UAS) have become more available for ... [more ▼]

Conservation of natural ecosystems requires regular monitoring of biodiversity, including the estimation of wildlife density. Recently, unmanned aerial systems (UAS) have become more available for numerous civilian applications. The use of small drones for wildlife surveys as a surrogate for manned aerial surveys is becoming increasingly attractive and has already been implemented with some success. This raises the question of how to process UAS imagery in order to determine the surface area of sampling strips within an acceptable confidence level. For the purpose of wildlife surveys, the estimation of sampling strip surface area needs to be both accurate and quick, and easy to implement. As GPS and an inertial measurement units are commonly integrated within unmanned aircraft platforms, two methods of direct georeferencing were compared here. On the one hand, we used the image footprint projection (IFP) method, which utilizes collinearity equations on each image individually. On the other hand, the Structure from Motion (SfM) technique was used for block orientation and georeferencing. These two methods were compared on eight sampling strips. An absolute orientation of the strip was determined by indirect georeferencing using ground control points. This absolute orientation was considered as the reference and was used for validating the other two methods. The IFP method was demonstrated to be the most accurate and the easiest to implement. It was also found to be less demanding in terms of image quality and overlap. However, even though a flat landscape is the type most widely encountered in wildlife surveys in Africa, we recommend estimating IFP sensitivity at an accentuation of the relief. [less ▲]

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See detailMicro-crédit, Augmentation du pouvoir d’achat et Amélioration des conditions de vie des populations précaires en milieu urbain africain : Résultats d’une expérience menée dans la zone de santé de Bandalungwa à Kinshasa, Congo.
Manzambi Kuwekita, Joseph ULg; Gosset, Christiane ULg; Guillaume, Michèle ULg et al

in Psychologie et Société Nouvelle (2013), XII(3), 3-14

Purchasing power increase, improvement of living conditions and health funding of vulnerable people in African urban areas: the case of the health zone of Bandalungwa, Kinshasa (Congo) Through a survey ... [more ▼]

Purchasing power increase, improvement of living conditions and health funding of vulnerable people in African urban areas: the case of the health zone of Bandalungwa, Kinshasa (Congo) Through a survey, the study analyses the living improvement possibilities for microentrepreneurs, by the improvement of their purchasing power through microcredits provided by the Programme National d’Appui à la Protection Sociale (PNPS), in the health zone of Bandalungwa (Kinshasa). The credits were affected to wheat flour, starches, fresh food, fruits and vegetables, small restoration, smoked fish, clothing, electronic devices. Main results suggest that 68% of the microentrepreneurs financed by the program have declared improved living conditions. This improvement was associated to access to health care, children schooling, household’s access to food, loan reimbursement, and rent payment. The bivariate analysis has shown that those who had invested the whole credit in the funded activity experienced living improvement. To help vulnerable people in increasing their purchasing power, the loans should be linked to projects that are helpful to the households, and avoid that households use the credit in unsuitable ways, which could maintain them in a high level of debt. [less ▲]

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See detailCatalogue of particle-accelerating colliding-wind binaries
De Becker, Michaël ULg; Raucq, Françoise ULg

in Astronomy and Astrophysics (2013), 558

Massive systems made of two or more stars are known to be the site for interesting physical processes -- including at least in some cases -- particle acceleration. Over the past decade, this topic ... [more ▼]

Massive systems made of two or more stars are known to be the site for interesting physical processes -- including at least in some cases -- particle acceleration. Over the past decade, this topic motivated a particular effort to unveil the properties of these systems and characterize the circumstances responsible for the acceleration of particles and the potential role of pre-supernova massive stars in the production of high energy particles in our Galaxy. Although previous studies on this topic were mostly devoted to processes in general, or to a few individual objects in particular, a unified target-oriented census of particle-accelerating colliding-wind binaries (hereafter PACWBs) does not exist yet. This paper aims at making a general and unified census of these systems, emphasizing their main properties. A general discussion includes energetic considerations along with wind properties in relation with non-thermal emission processes that are likely at work in colliding-wind binaries. Finally, some guidelines for future observational and theoretical studies are drawn. [less ▲]

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See detailBaker's yeast behavior during vacuum agitated contact drying
Bennamoun, Lyes ULg; Afzal, Muhammad; Léonard, Angélique ULg

in Chemical Engineering and Technology (2013), 36(10), 1795-1800

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See detailA Comparison of Two Spelling Brain-Computer Interfaces Based on Visual P3 and SSVEP in Locked-In Syndrome
Combaz, Adrien; Chatelle, Camille ULg; Robben, Arne et al

in PLoS ONE (2013), 8(9), 73691

Objectives: We study the applicability of a visual P3-based and a Steady State Visually Evoked Potentials (SSVEP)-based Brain-Computer Interfaces (BCIs) for mental text spelling on a cohort of patients ... [more ▼]

Objectives: We study the applicability of a visual P3-based and a Steady State Visually Evoked Potentials (SSVEP)-based Brain-Computer Interfaces (BCIs) for mental text spelling on a cohort of patients with incomplete Locked-In Syndrome (LIS). Methods: Seven patients performed repeated sessions with each BCI. We assessed BCI performance, mental workload and overall satisfaction for both systems. We also investigated the effect of the quality of life and level of motor impairment on the performance. Results: All seven patients were able to achieve an accuracy of 70% or more with the SSVEP-based BCI, compared to 3 patients with the P3-based BCI, showing a better performance with the SSVEP BCI than with the P3 BCI in the studied cohort. Moreover, the better performance of the SSVEP-based BCI was accompanied by a lower mental workload and a higher overall satisfaction. No relationship was found between BCI performance and level of motor impairment or quality of life. Conclusion:Our results show a better usability of the SSVEP-based BCI than the P3-based one for the sessions performed by the tested population of locked-in patients with respect to all the criteria considered. The study shows the advantage of developing alternative BCIs with respect to the traditional matrix-based P3 speller using different designs and signal modalities such as SSVEPs to build a faster, more accurate, less mentally demanding and more satisfying BCI by testing both types of BCIs on a convenience sample of LIS patients. [less ▲]

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See detailThe role of wrist actigraphy in the evaluation and safety of patients in psychogeriatric ward
GILLAIN, Daniel ULg; Schyns, Edwin ULg; LEJEUNE, Christophe ULg et al

in European Geriatric Medicine (2013), 4(S1),

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See detailOptimization of Shipyard Space Allocation and Scheduling using Heuristic Algorithm
Caprace, Jean-David ULg; Petcu, Cristian ULg; Velarde, Marco et al

in Journal of Marine Science & Technology (2013), 18(3), 404-417

In this paper we describe the development of a tool that allows planners to efficiently and effectively plan space within valuable areas of a shipyard. Traditionally, space is considered as resource ... [more ▼]

In this paper we describe the development of a tool that allows planners to efficiently and effectively plan space within valuable areas of a shipyard. Traditionally, space is considered as resource; however, it is difficult to accurately account for and plan its consumption with the current planning software tools available. The spatial scheduling tool described in this paper can be used by planners to manually or automatically reserve space within the shipyard for construction of large blocks over the entire ship erection period. The software is coupled with a heuristic optimization solver which is inspired by an algorithm used for "3D bin-packing problems". The result is the ability to efficiently generate and compare multiple space allocation alternatives in a reduced time with the ultimate goal of maintaining the critical ship erection schedule. Better solution than manual or semi-automatic allocation of blocks can be obtained through the optimization module. [less ▲]

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See detailNatural spatial variability of algal endosymbiont density in the coral Acropora globiceps: a small-scale approach along environmental gradients around Moorea (French Polynesia)
Ladrière, Ophélie ULg; Penin, Lucie; Van Lierde, Elodie et al

in Journal of the Marine Biological Association of the United Kingdom (2013)

This study provides a baseline describing natural small scale variability of Symbiodinium density in the sentinel coral Acropora globiceps during the summer, under non-bleaching conditions. Spatial scales ... [more ▼]

This study provides a baseline describing natural small scale variability of Symbiodinium density in the sentinel coral Acropora globiceps during the summer, under non-bleaching conditions. Spatial scales investigated range from the colony scale (1–10 cm, i.e. among branches of the same colony) to the reef scale (1–10 km, i.e. among stations distributed over several locations and depths), at Moorea Island, French Polynesia. The coral–Symbiodinium symbiosis is a key process in scleractinian coral physiology, and Symbiodinium density provides an easy-to-measure and inexpensive biomarker of this symbiosis health. Spatial variability of three major environmental factors: light intensity, sedimentation and water motion was also assessed to evaluate their potential link with Symbiodinium density. Density of Symbiodinium did not significantly differ within colonies or among colonies within a station. However, a marked depth gradient was observed, showing increasing density with increasing depth and decreasing light intensity. These observations provide an interesting reference for forthcoming comparisons with disturbed conditions, such as bleaching events. [less ▲]

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See detailNumerical simulation of the Roll forming of thin-walled sections and evaluation of corner strength enhancement
Rossi, Barbara ULg; Degée, Hervé ULg; Boman, Romain ULg

in Finite Elements in Analysis & Design (2013), 72

Cold roll forming modifies the mechanical properties of thin-walled profiles by strain hardening. The understanding of this phenomenon, which is rather good for profiles made of traditional construction ... [more ▼]

Cold roll forming modifies the mechanical properties of thin-walled profiles by strain hardening. The understanding of this phenomenon, which is rather good for profiles made of traditional construction steel, is mandatory for assessing the member resistance. Less information is however available for profiles made of materials exhibiting a pronounced degree of nonlinearity of the stress-strain curve such as high-strength and stainless steels. Current codes generally encounter difficulties for modelling this fabrication process because of the size of industrial mills. Indeed, accurate modelling of the continuous cold roll forming process using finite elements requires a huge number of elements leading to excessive CPU times. Therefore, modellers usually reduce the geometry of the formed sheet or increase the size of the finite elements, inducing a loss of accuracy in the results. In this work, the finite element software METAFOR is used to model cold roll forming of channel profiles made of high-strength and stainless steels. The numerical results, expressed in terms of corner strength enhancement versus radius–to–thickness ratio, are compared against an existing predictive model. [less ▲]

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See detailSilver nanowire networks: Physical properties and potential integration in solar cells
Langley, Daniel ULg; Giusti, Gael; Lagrange, Mélanie et al

in Solar Energy Materials & Solar Cells (2013)

With the growing interest in flexible electronics and the increased utilization of Indium Tin Oxide electrodes for display and photovoltaic applications the need for new materials is emerging. In this ... [more ▼]

With the growing interest in flexible electronics and the increased utilization of Indium Tin Oxide electrodes for display and photovoltaic applications the need for new materials is emerging. In this work we present the electro-optical properties of Ag nanowire networks as an alternative transparent conductive material. A comparison of different film deposition techniques is made and indicates that the properties of the network are independent of the fabrication method. Analysis of the electrical behavior as a function of nanowire density is made and compared with theoretical results as well as Monte Carlo simulations. Thermal annealing is shown to reduce the sheet resistance from 1000 Ω/sq to 8 Ω/sq; this reduction is achieved by local sintering of the nanowire junctions. Experimental optimization of Ag nanowire electrodes was undertaken and a peak in the electro-optical properties is observed at approximately 100 mg/m². Finally a discussion of the potential integration of Ag nanowire networks into solar cells is undertaken; we observe that these electrodes show promise as an emerging transparent conductive material, especially for flexible applications. [less ▲]

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See detailHeight competition between Quercus petraea and Fagus sylvatica natural regeneration in mixed and uneven-aged stands
Ligot, Gauthier ULg; Balandier, Philippe; Fayolle, Adeline ULg et al

in Forest Ecology & Management (2013), 304

We monitored in situ natural regeneration in 23 uneven-aged stands. We modelled height growth in the regeneration of Quercus petraea and Fagus sylvatica. Beech saplings grew faster than oak saplings at ... [more ▼]

We monitored in situ natural regeneration in 23 uneven-aged stands. We modelled height growth in the regeneration of Quercus petraea and Fagus sylvatica. Beech saplings grew faster than oak saplings at all light levels. Oak gained greater benefit from direct radiation than did beech. Canopy opening is insufficient to promote oak over beech regeneration. [less ▲]

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See detailLarge-scale pattern of genetic differentiation within African rainforest trees: insights on the roles of ecological gradients and past climate changes on the evolution of Erythrophleum spp (Fabaceae)
Duminil, Jérôme; Brown, Richard P.; Ewédjè, Eben-Ezer BK. et al

in BMC Evolutionary Biology (2013), 13

Background: The evolutionary events that have shaped biodiversity patterns in the African rainforests are still poorly documented. Past forest fragmentation and ecological gradients have been advocated as ... [more ▼]

Background: The evolutionary events that have shaped biodiversity patterns in the African rainforests are still poorly documented. Past forest fragmentation and ecological gradients have been advocated as important drivers of genetic differentiation but their respective roles remain unclear. Using nuclear microsatellites (nSSRs) and chloroplast non-coding sequences (pDNA), we characterised the spatial genetic structure of Erythrophleum (Fabaceae) forest trees in West and Central Africa (Guinea Region, GR). This widespread genus displays a wide ecological amplitude and taxonomists recognize two forest tree species, E. ivorense and E. suaveolens, which are difficult to distinguish in the field and often confused. Results: Bayesian-clustering applied on nSSRs of a blind sample of 648 specimens identified three major gene pools showing no or very limited introgression. They present parapatric distributions correlated to rainfall gradients and forest types. One gene pool is restricted to coastal evergreen forests and corresponds to E. ivorense; a second one is found in gallery forests from the dry forest zone of West Africa and North-West Cameroon and corresponds to West-African E. suaveolens; the third gene pool occurs in semi-evergreen forests and corresponds to Central African E. suaveolens. These gene pools have mostly unique pDNA haplotypes but they do not form reciprocally monophyletic clades. Nevertheless, pDNA molecular dating indicates that the divergence between E. ivorense and Central African E. suaveolens predates the Pleistocene. Further Bayesian-clustering applied within each major gene pool identified diffuse genetic discontinuities (minor gene pools displaying substantial introgression) at a latitude between 0 and 2°N in Central Africa for both species, and at a longitude between 5° and 8°E for E. ivorense. Moreover, we detected evidence of past population declines which are consistent with historical habitat fragmentation induced by Pleistocene climate changes. Conclusions: Overall, deep genetic differentiation (major gene pools) follows ecological gradients that may be at the origin of speciation, while diffuse differentiation (minor gene pools) are tentatively interpreted as the signature of past forest fragmentation induced by past climate changes. [less ▲]

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See detailUse of response surface methodology for the optimization of the lipase-catalyzed synthesis of mannosyl myristate in pure ionic liquid
Galonde, Nadine ULg; Brostaux, Yves ULg; Richard, Gaetan ULg et al

in Process Biochemistry (2013), 48(11), 1914-1920

The purpose of the present study is to find the conditions allowing to reach the highest 24 h-yield(24 h- ) for the synthesis of mannosyl myristate catalyzed by the immobilized lipase B from Candida ... [more ▼]

The purpose of the present study is to find the conditions allowing to reach the highest 24 h-yield(24 h- ) for the synthesis of mannosyl myristate catalyzed by the immobilized lipase B from Candida antarctica (Novozym®435) in the ionic liquid (IL) [Bmpyrr][TFO] (1-butyl-1-methylpyrrolidinium tri-fluoromethanesulfonate). A full factorial design (FFD) was used in order to study the influence of three variables (temperature, mannose/vinyl myristate ratio and total substrate quantity) on the 24 h- . This design led to a model based on a second order polynomial response function. The resulting predicted con-tour plots have shown that the highest 24 h- should be obtained with high temperatures, low sugar/vinylester molar ratio and intermediate total substrate quantities (mmol). The model has been successfully verified and experimentally confirmed at the optimal conditions of 80◦C, substrate molar ratio of 1/10and total substrate quantity of 0.26 mmol leading to the highest predicted 24 h- of 72.2%. [less ▲]

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See detailMilli-interacting dark matter
Wallemacq, Quentin ULg

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2013), 88(6),

We present a dark matter model reproducing well the results from DAMA/LIBRA and CoGeNT and having no contradiction with the negative results from XENON100 and CDMS-II/Ge. Two new species of fermions F and ... [more ▼]

We present a dark matter model reproducing well the results from DAMA/LIBRA and CoGeNT and having no contradiction with the negative results from XENON100 and CDMS-II/Ge. Two new species of fermions F and G form hydrogenlike atoms with standard atomic size through a dark U(1) gauge interaction carried out by a dark massless photon. A Yukawa coupling between the nuclei F and neutral scalar particles S induces an attractive shorter-range interaction. This dark sector interacts with our standard particles because of the presence of two mixings, a kinetic photon–dark photon mixing, and a mass σ-S mixing. The dark atoms from the halo diffuse elastically in terrestrial matter until they thermalize and then reach underground detectors with thermal energies, where they form bound states with nuclei by radiative capture. This causes the emission of photons that produce the signals observed by direct-search experiments. [less ▲]

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See detailCLINICAL AND FUNCTIONAL CHARACTERISTICS OF NONAGENARIANS HOSPITALIZED IN A GERIATRIC UNIT: A DESCRIPTIVE STUDY
Petermans, Jean ULg; Mathieu, Sandrine; ALLEPAERTS, Sophie ULg et al

in Journal of Aging Research and Clinical Practice (2013), 2(3), 303-309

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See detailThe Anti-Tumor Effect of HDAC Inhibition in a Human Pancreas Cancer Model Is Significantly Improved by the Simultaneous Inhibition of Cyclooxygenase 2
Peulen, Olivier ULg; Gonzalez, Arnaud; Peixoto, Paul ULg et al

in PLoS ONE (2013), 8(9), 75102

Pancreatic ductal adenocarcinoma is the fourth leading cause of cancer death worldwide, with no satisfactory treatment to date. In this study, we tested whether the combined inhibition of cyclooxygenase-2 ... [more ▼]

Pancreatic ductal adenocarcinoma is the fourth leading cause of cancer death worldwide, with no satisfactory treatment to date. In this study, we tested whether the combined inhibition of cyclooxygenase-2 (COX-2) and class I histone deacetylase (HDAC) may results in a better control of pancreatic ductal adenocarcinoma. The impact of the concomitant HDAC and COX-2 inhibition on cell growth, apoptosis and cell cycle was assessed first in vitro on human pancreas BxPC-3, PANC-1 or CFPAC-1 cells treated with chemical inhibitors (SAHA, MS-275 and celecoxib) or HDAC1/2/3/7 siRNA. To test the potential antitumoral activity of this combination in vivo, we have developed and characterized, a refined chick chorioallantoic membrane tumor model that histologically and proteomically mimics human pancreatic ductal adenocarcinoma. The combination of HDAC1/3 and COX-2 inhibition significantly impaired proliferation of BxPC-3 cells in vitro and stalled entirely the BxPC-3 cells tumor growth onto the chorioallantoic membrane in vivo. The combination was more effective than either drug used alone. Consistently, we showed that both HDAC1 and HDAC3 inhibition induced the expression of COX-2 via the NF-kB pathway. Our data demonstrate, for the first time in a Pancreatic Ductal Adenocarcinoma (PDAC) model, a significant action of HDAC and COX-2 inhibitors on cancer cell growth, which sets the basis for the development of potentially effective new combinatory therapies for pancreatic ductal adenocarcinoma patients. [less ▲]

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See detailExperimental techniques for ballistic pressure measurements and recent development in means of calibration
Elkarous, Lamine ULg; Coghe, Frederik; Pirlot, Marc et al

in Journal of Physics: Conference Series (2013), 459

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See detailSéjours en dystopie, ou l’anticipation à la française. Recension de Natacha VAS-DEYRES, Ces Français qui ont écrit demain. Utopie, anticipation et science-fiction au XXe siècle
Stienon, Valérie ULg

in Acta Fabula : Revue des Parutions en Théorie Littéraire (2013), 14(6),

La science‑fiction, parce qu’elle est particulièrement centrée sur les questions sociales et les rapports sociopolitiques, serait devenue au xxe siècle le creuset des utopies. Les textes variés qui la ... [more ▼]

La science‑fiction, parce qu’elle est particulièrement centrée sur les questions sociales et les rapports sociopolitiques, serait devenue au xxe siècle le creuset des utopies. Les textes variés qui la composent, désormais axés non plus sur la description d’un idéal mais sur la confrontation au réel, épouseraient les scansions de l’Histoire dans laquelle ils sont engagés et pourraient être considérés à l’aune d’une représentation réaliste. C’est en s’appuyant sur ce double constat que Natacha Vas‑Deyres étudie la « littérature utopique » en mêlant à dessein les sous‑genres et en donnant la prédilection à son ancrage historique. [less ▲]

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See detailPump and probe of ultrafast charge reorganization in small peptides: A computational study through sudden ionizations
Kus, Tomasz ULg; Mignolet, Benoît ULg; Levine, R. D. et al

in Journal of Physical Chemistry A (2013), 117(40), 10513-10525

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See detailDiversity and endemism of Murinae rodents in Thai limestone karsts
Latinne, Alice ULg; Waengsothorn, Surachit; Rojanadilok, Prateep et al

in Systematics and Biodiversity (2013), 11(3), 323-344

This study aims to investigate the species diversity of rodents living in karst ecosystems of Thailand. A survey has been conducted throughout Thailand, 122 karsts sampled and 477 Murinae rodents live ... [more ▼]

This study aims to investigate the species diversity of rodents living in karst ecosystems of Thailand. A survey has been conducted throughout Thailand, 122 karsts sampled and 477 Murinae rodents live-trapped. Phylogenetic reconstructions were carried out using two mitochondrial markers (cytb, COI). A sequence-based species delimitation method completed by the analysis of the level of genetic divergence was then applied to define species boundaries within our dataset. The phylogenetic position of Niviventer hinpoon was also investigated and sequences obtained from the holotype specimen of this species were used to reliably identify samples of N. hinpoon. A total of 12 described Murinae species, corresponding to 17 deeply divergent genetic lineages, were encountered in limestone karsts of Thailand. Our study revealed an important genetic diversity within the traditionally recognized species Maxomys surifer (four highly divergent genetic lineages), Leopoldamys neilli (two highly divergent genetic lineages) and Berylmys bowersi (two highly divergent genetic lineages). These species could be considered as species complex and require further taxonomic work. This study also provides valuable information on the distribution of the two rodent species endemic to limestone karsts of Thailand, L. neilli and N. hinpoon. Leopoldamys neilli was the most abundant species encountered in Thai karsts during our survey. However, L. neilli specimens from western Thailand are genetically highly divergent from the remaining populations of L. neilli and could represent a separate species. Niviventer hinpoon, phylogenetically closely related to N. fulvescens, is much rarer and its distribution limited to central Thailand. Most of the other captured species are typically associated with forest ecosystems. This study suggests that limestone karsts play a key role in the preservation of the rodent species endemic to such habitat, but they would also provide refuges for the forest-dwelling Murinae rodents in deforested regions. [less ▲]

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See detailUse of lipases for the kinetic resolution of lactic acid esters in heptane or in a solvent free system
Richard, Gaetan ULg; Nott, Katherine ULg; Nicks, François et al

in Journal of Molecular Catalysis B : Enzymatic (2013), 97

tKinetic resolution of d,l-ethyl lactate (d,l-LA-Et) and d,l-butyl lactate (d,l-LA-Bu) was accomplished inthe presence of lipases. Transesterification of the lactate esters with alcohols was shown to be ... [more ▼]

tKinetic resolution of d,l-ethyl lactate (d,l-LA-Et) and d,l-butyl lactate (d,l-LA-Bu) was accomplished inthe presence of lipases. Transesterification of the lactate esters with alcohols was shown to be poorlyenantioselective, with a very low preference toward the l enantiomer. However, esterification of the freehydroxyl function of the lactate esters was much more enantioselective, with an opposite preferencetoward the d form. Among the 200 combinations screened (substrates and lipases), only two reactionsfulfilled the required criteria for an efficient resolution (fast reaction, enantioselectivity ratio higherthan 100). The best resolution was obtained by esterification of d,l-LA-Bu with butyric anhydride inthe presence of lipase B from Candida antarctica (CAL-B) in heptane (at 30◦C): LA-Bu was resolved in6 h with an initial esterification rate of d-LA-BU of 1.5 g L−1h−1g−1EZ, an enantioselectivity ratio higherthan 100, a l substrate consumption lower than 1%, and a final substrate enantiomeric excess superiorto 99%. After having demonstrated that neither LA-Bu nor BuAn were inhibitors of CAL-B, the reactionwas further improved by carrying it out in a solvent free system, at an elevated temperature (60◦C), andat a higher lipase concentration. LA-Bu was resolved in 6 h with an initial rate of 7.6 g L−1h−1g−1EZ, anenantioselectivity ratio higher than 100, and a final substrate enantiomeric excess of 95%. [less ▲]

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See detailClassification and environmental properties of X-ray selected point-like sources in the XMM-LSS field
Melnyk, Olga ULg; Plionis, M.; Elyiv, Andrii ULg et al

in Astronomy and Astrophysics (2013), 557(A81),

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See detailEvading death by vacuum
Barroso, Augusto; Ferreira, Pedro; Ivanov, Igor ULg et al

in European Physical Journal C -- Particles & Fields (2013), 73

In the Standard Model, the Higgs potential allows only one minimum at tree level. But the open possibility that there might be two scalar doublets enriches the vacuum structure, allowing for the risk that ... [more ▼]

In the Standard Model, the Higgs potential allows only one minimum at tree level. But the open possibility that there might be two scalar doublets enriches the vacuum structure, allowing for the risk that we might now be in a metastable state, which we dub the panic vacuum. Current experiments at the LHC are probing the Higgs particle predicted as a result of the spontaneous symmetry breaking. Remarkably, in the two Higgs model with a softly broken U(1) symmetry, the LHC experiments already allow to exclude many panic vacuum solutions. [less ▲]

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See detailAn analysis on energy efficiency initiatives in the building stock of Liege, Belgium
Singh, Manoj Kumar ULg; Mahapatra, Sadhan; Teller, Jacques ULg

in Energy Policy (2013), http://dx.doi.org/10.1016/j.enpol.2013.07.138

Built environment is responsible for 60% of total energy consumption in European countries and 128 million BOE of primary energy in Belgium. The average energy consumption in the residential buildings of ... [more ▼]

Built environment is responsible for 60% of total energy consumption in European countries and 128 million BOE of primary energy in Belgium. The average energy consumption in the residential buildings of Belgium is 70% higher than the EU average and stands at 348 kWh/m2/year. Energy Performance Building Directive (EPBD) provides guidelines for energy performance analysis of buildings in Belgium. In this study, a holistic approach has been adopted to analyse the building stock of Liege, Belgium. This analysis is based on ‘General Socio-economic survey 2001’ and ‘Housing quality survey 2006 in Walloon region’databases. It considers parameters such as buildings age, built-up area, type of heating system, type of fuel used, adjacency, insulation of roofs and walls and energy consumption etc. for an in depth analysis. This study concludes that about 69% of buildings which are constructed before 1945 needs serious renovation towards the improvement of roof and external wall insulation level. It then successfully identifies specific areas which need detailed study to evaluate the comfort status in the existing building stock, improvement of insulation level and its effect on heating energy consumption as well as the economic analysis on energy efficiency measurements. [less ▲]

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See detailL’envoi par Taxipost secur et l’exigence d’un courrier recommandé à la poste en droit du travail
Coenegrachts, Olivier ULg

in Revue de la Faculté de Droit de l'Université de Liège (2013), 2

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See detailDiscovery of a magnetic field in the CoRoT hybrid B-type pulsator HD 43317
Briquet, Maryline ULg; Neiner, C.; Leroy, B. et al

in Astronomy and Astrophysics (2013), 557

Context. A promising way of testing the impact of a magnetic field on internal mixing (core overshooting, internal rotation) in main-sequence B-type stars is to perform asteroseismic studies of a sample ... [more ▼]

Context. A promising way of testing the impact of a magnetic field on internal mixing (core overshooting, internal rotation) in main-sequence B-type stars is to perform asteroseismic studies of a sample of magnetic pulsators. <BR /> Aims: The CoRoT satellite revealed that the B3IV star HD 43317 is a hybrid SPB/β Cep-type pulsator that has a wealth of pulsational constraints on which one can perform a seismic modelling, in particular, probing the extent of its convective core and mixing processes. Moreover, indirect indicators of a magnetic field in the star were observed: rotational modulation due to chemical or temperature spots and X-ray emission. Our goal was to directly investigate the field in HD 43317 and, if it is magnetic, to characterise it. <BR /> Methods: We collected data with the Narval spectropolarimeter installed at Télescope Bernard Lyot (TBL, Pic du Midi, France) and applied the least-squares deconvolution technique to measure the circular polarisation of the light emitted from HD 43317. We modelled the longitudinal field measurements directly with a dipole. <BR /> Results: Zeeman signatures in the Stokes V profiles of HD 43317 are clearly detected and rotationally modulated, which proves that this star exhibits an oblique magnetic field. The modulation with the rotation period deduced from the CoRoT light curve is also confirmed, and we found a field strength at the poles of about 1 kG. Our result must be taken into account in future seismic modelling work of this star. Based on observations obtained using the Narval spectropolarimeter at the Observatoire du Pic du Midi (France), which is operated by the Institut National des Sciences de l'Univers (INSU). [less ▲]

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See detailA Herschel Study of D/H in Water in the Jupiter-family Comet 45P/Honda-Mrkos-Pajdušáková and Prospects for D/H Measurements with CCAT
Lis, D. C.; Biver, N.; Bockelée-Morvan, D. et al

in Astrophysical Journal Letters (2013), 774

We present Herschel observations of water isotopologues in the atmosphere of the Jupiter-family comet 45P/Honda-Mrkos-Pajdušáková. No HDO emission is detected, with a 3σ upper limit of 2.0 × 10[SUP]–4 ... [more ▼]

We present Herschel observations of water isotopologues in the atmosphere of the Jupiter-family comet 45P/Honda-Mrkos-Pajdušáková. No HDO emission is detected, with a 3σ upper limit of 2.0 × 10[SUP]–4[/SUP] for the D/H ratio. This value is consistent with the earlier Herschel measurement in the Jupiter-family comet 103P/Hartley 2. The canonical value of 3 × 10[SUP]–4[/SUP] measured pre-Herschel in a sample of Oort-cloud comets can be excluded at a 4.5σ level. The observations presented here further confirm that a diversity of D/H ratios exists in the comet population and emphasize the need for additional measurements with future ground-based facilities, such as CCAT, in the post-Herschel era. [less ▲]

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See detailA detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry
Arellano Ferro, A.; Bramich, D. M.; Figuera Jaimes, R. et al

in Monthly Notices of the Royal Astronomical Society (2013), 434

We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for ... [more ▼]

We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than V ˜ 19.0 mag, even in the crowded central regions of the cluster. The high photometric precision has resulted in the discovery of two new RRc stars, three eclipsing binaries, seven long-term variables and one field RRab star behind the cluster. A detailed identification chart and equatorial coordinates are given for all the variable stars in the field of our images of the cluster. Our data together with the literature V-data obtained in 1994 and 1995 allowed us to refine considerably the periods for all RR Lyrae stars. The nature of the new variables is discussed. We argue that variable V12 is a cluster member and an Anomalous Cepheid. Secular period variations, double-mode pulsations and/or the Blazhko-like modulations in some RRc variables are addressed. Through the light-curve Fourier decomposition of 12 RR Lyrae stars we have calculated a mean metallicity of [Fe/H][SUB]ZW[/SUB] = -1.70 ± 0.01(statistical) ± 0.14(systematic) or [Fe/H]_{text{UVES}}=-1.67 ± 0.01(statistical) ± 0.19(systematic). Absolute magnitudes, radii and masses are also estimated for the RR Lyrae stars. A detailed search for SX Phe stars in the Blue Straggler region was conducted but none were discovered. If SX Phe exist in the cluster then their amplitudes must be smaller than the detection limit of our photometry. The colour-magnitude diagram has been corrected for heavy differential reddening using the detailed extinction map of the cluster of Alonso-García et al. This has allowed us to set the mean cluster distance from two independent estimates; from the RRab and RRc absolute magnitudes, we find 8.04 ± 0.19 and 7.88 ± 0.30 kpc, respectively. [less ▲]

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See detailAtmospheric parameters of 169 F-, G-, K- and M-type stars in the Kepler field
Molenda-Żakowicz, J.; Sousa, S. G.; Frasca, A. et al

in Monthly Notices of the Royal Astronomical Society (2013), 434

The asteroseismic and planetary studies, like all research related to stars, need precise and accurate stellar atmospheric parameters as input. We aim at deriving the effective temperature (T[SUB]eff[/SUB ... [more ▼]

The asteroseismic and planetary studies, like all research related to stars, need precise and accurate stellar atmospheric parameters as input. We aim at deriving the effective temperature (T[SUB]eff[/SUB]), the surface gravity (log g), the metallicity ([Fe/H]), the projected rotational velocity (v sin i) and the MK type for 169 F-, G-, K- and M-type Kepler targets which were observed spectroscopically from the ground with five different instruments. We use two different spectroscopic methods to analyse 189 high-resolution, high-signal-to-noise spectra acquired for the 169 stars. For 67 stars, the spectroscopic atmospheric parameters are derived for the first time. KIC 9693187 and 11179629 are discovered to be double-lined spectroscopic binary systems. The results obtained for those stars for which independent determinations of the atmospheric parameters are available in the literature are used for a comparative analysis. As a result, we show that for solar-type stars the accuracy of present determinations of atmospheric parameters is ±150 K in T[SUB]eff[/SUB], ±0.15 dex in [Fe/H] and ±0.3 dex in log g. Finally, we confirm that the curve-of-growth analysis and the method of spectral synthesis yield systematically different atmospheric parameters when they are applied to stars hotter than 6000 K. [less ▲]

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See detailLow-amplitude rotational modulation rather than pulsations in the CoRoT B-type supergiant HD 46769
Aerts, C.; Simón-Díaz, S.; Catala, C. et al

in Astronomy and Astrophysics (2013), 557

<BR /> Aims: We aim to detect and interpret photometric and spectroscopic variability of the bright CoRoT B-type supergiant target HD 46769 (V = 5.79). We also attempt to detect a magnetic field in the ... [more ▼]

<BR /> Aims: We aim to detect and interpret photometric and spectroscopic variability of the bright CoRoT B-type supergiant target HD 46769 (V = 5.79). We also attempt to detect a magnetic field in the target. <BR /> Methods: We analyse a 23-day oversampled CoRoT light curve after detrending and spectroscopic follow-up data using standard Fourier analysis and phase dispersion minimization methods. We determine the fundamental parameters of the star, as well as its abundances from the most prominent spectral lines. We perform a Monte Carlo analysis of spectropolarimetric data to obtain an upper limit of the polar magnetic field, assuming a dipole field. <BR /> Results: In the CoRoT data, we detect a dominant period of 4.84 d with an amplitude of 87 ppm and some of its (sub-)multiples. Given the shape of the phase-folded light curve and the absence of binary motion, we interpret the dominant variability in terms of rotational modulation, with a rotation period of 9.69 d. Subtraction of the rotational modulation signal does not reveal any sign of pulsations. Our results are consistent with the absence of variability in the Hipparcos light curve. The spectroscopy leads to a projected rotational velocity of 72 ± 2 km s[SUP]-1[/SUP] and does not reveal periodic variability or the need to invoke macroturbulent line broadening. No signature of a magnetic field is detected in our data. A field stronger than ~500 G at the poles can be excluded, unless the possible non-detected field were more complex than dipolar. <BR /> Conclusions: The absence of pulsations and macroturbulence of this evolved B-type supergiant is placed into the context of instability computations and of observed variability of evolved B-type stars. Based on CoRoT space-based photometric data; the CoRoT space mission was developed and operated by the French space agency CNES, with the participation of ESA's RSSD and Science Programmes, Austria, Belgium, Brazil, Germany, and Spain. Based on observations collected at La Silla Observatory, ESO (Chile) with the HARPS spectrograph at the 3.6 m telescope, under programme LP185.D-0056. Based on observations obtained with the HERMES spectrograph attached to the 1.2 m Mercator telescope, which is supported by the Fund for Scientific Research of Flanders (FWO), Belgium, the Research Council of KU Leuven, Belgium, the Fonds National de la Recherche Scientific (FNRS), Belgium, the Royal Observatory of Belgium, the Observatoire de Genève, Switzerland, and the Thüringer Landessternwarte Tautenburg, Germany. Based on observations obtained with the Narval spectropolarimeter at the Observatoire du Pic du Midi (France), which is operated by the Institut National des Sciences de l'Univers (INSU). [less ▲]

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See detailImpact des périodes d'attente et de reproduction sur la fécondité de la vache laitière
Chapaux, Philippe; Glorieux, Géry; Hanzen, Christian ULg

in Wallonie Elevages (2013)

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See detailCharacterization of clay deposits of Nanga-Eboko (Central Cameroon): Suitability in the production of building materials
Nzeukou Nzeugang, A.; Medjo Eko, R.; Fagel, Nathalie ULg et al

in Clay Minerals (2013), 48(4), 655-662

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See detailHigh-precision photometry by telescope defocusing - V. WASP-15 and WASP-16
Southworth, John; Mancini, L.; Browne, P. et al

in Monthly Notices of the Royal Astronomical Society (2013), 434

We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers ... [more ▼]

We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers. Our new data for WASP-15 comprise observations of one transit simultaneously in four optical passbands using GROND on the MPG/European Southern Observatory (ESO) 2.2 m telescope, plus coverage of half a transit from DFOSC on the Danish 1.54 m telescope, both at ESO La Silla. For WASP-16 we present observations of four complete transits, all from the Danish telescope. We use these new data to refine the measured physical properties and orbital ephemerides of the two systems. Whilst our results are close to the originally determined values for WASP-15, we find that the star and planet in the WASP-16 system are both larger and less massive than previously thought. [less ▲]

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See detailComets C/2012 V2 (LINEAR) and C/2013 R1 (Lovejoy)
Opitom, Cyrielle ULg; Jehin, Emmanuel ULg; Manfroid, Jean ULg et al

in Central Bureau Electronic Telegrams (2013), 3659

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See detailCOSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses: XIV. Time delay of the doubly lensed quasar SDSS~J1001+5027
Rathna Kumar, S.; Tewes, M.; Stalin, C.S. et al

in Astronomy and Astrophysics (2013), 557

This paper presents optical R-band light curves and the time delay of the doubly imaged gravitationally lensed quasar SDSS J1001+5027 at a redshift of 1.838. We have observed this target for more than six ... [more ▼]

This paper presents optical R-band light curves and the time delay of the doubly imaged gravitationally lensed quasar SDSS J1001+5027 at a redshift of 1.838. We have observed this target for more than six years, between March 2005 and July 2011, using the 1.2-m Mercator Telescope, the 1.5-m telescope of the Maidanak Observatory and the 2-m Himalayan Chandra Telescope. Our resulting light curves are composed of 443 independent epochs, and show strong intrinsic quasar variability, with an amplitude of the order of 0.2 magnitudes. From this data, we measure the time delay using five different methods, all relying on distinct approaches. One of these techniques is a new development presented in this paper. All our time-delay measurements are perfectly compatible. By combining them, we conclude that image A is leading B by 119.3 ± 3.3 days (1σ, 2.8%), including systematic errors. It has been shown recently that such accurate time-delay measurements offer a highly complementary probe of dark energy and spatial curvature, as they independently constrain the Hubble constant. The next mandatory step towards using SDSS J1001+5027 in this context will be the measurement of the redshift of the lensing galaxy, in combination with deep HST imaging. [less ▲]

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See detailActualités et perspectives du warrant
Vrancken, Martin ULg

in Revue de la Faculté de Droit de l'Université de Liège (2013), (2), 185-235

Le présent entend présenter la figure du warrant dans le paysage des sûretés réelles mobilières en droit belge. Il tient compte de la récente réforme du régime des sûretés réelles mobilières, survenue en ... [more ▼]

Le présent entend présenter la figure du warrant dans le paysage des sûretés réelles mobilières en droit belge. Il tient compte de la récente réforme du régime des sûretés réelles mobilières, survenue en 2013. [less ▲]

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See detailA two-scale model predicting the mechanical behavior of nanocrystalline solids
Péron-Lührs, Vincent ULg; Jérusalem, Antoine; Sansoz, Frédéric et al

in Journal of the Mechanics & Physics of Solids (2013), 61(9), 1895-1914

Polycrystalline materials, with nanosized grains (<100 nm), exhibit superior strength exceeding those of their coarse-grained counterparts. With such small grains, the deformation mechanisms taking place ... [more ▼]

Polycrystalline materials, with nanosized grains (<100 nm), exhibit superior strength exceeding those of their coarse-grained counterparts. With such small grains, the deformation mechanisms taking place at grain boundaries (GBs) become dominant compared to the intragranular crystal plasticity. Recent studies have revealed that the deformation mechanisms are influenced by the GB network. For instance, a high yield stress in nanostructured metals can be obtained by choosing the relevant grain boundary character distribution (GBCD). In this paper we present an original numerical multiscale approach to predict the mechanical behavior of nanostructured metals according to their GBCD composed of either high angle (HA) GBs (HAB) or low angle (LA) GBs (LAB). Molecular simulations using the quasicontinuum method (QC) are performed to obtain the mechanical response at the nanoscale of GB undergoing simple shear (GB sliding behavior) and tensile loads (GB opening behavior). To simulate the grain behavior, a mechanical model of dislocation motions through a forest dislocation is calibrated using a nanoindentation simulation performed with QC. These QC results are then used in a finite element code (direct numerical simulation-DNS) as a GB constitutive model and as a grain constitutive model. This two-scale framework does not suffer from length scale limitations conventionally encountered when considering the two scales separately. [less ▲]

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See detailLa production des campagnes médiatiques de santé publique : une dialectique entre normalisation des comportements collectifs et appel à la responsabilisation individuelle
Ketterer, Frédéric ULg

in Socio-Logos (2013), 8

Since the seventies, communication campaigns in public health have become systematic. Today they are considered as full political actions. We analyzed their production based on data of three monographs of ... [more ▼]

Since the seventies, communication campaigns in public health have become systematic. Today they are considered as full political actions. We analyzed their production based on data of three monographs of French campaigns – two concerning mental health and a third one on AIDS. This analysis highlighted the existence of an interweaving of collective and individual dimensions of the considered health facts. The collective dimension appeared through the "social construction of public health" (Fassin, 2005). It comprises a phase of medicalization of social facts (transcription of a pathology in the social language), and another of giving a political dimension to it, which implies multiplying the actors linked to the topic. Both phases require the demonstration of the collective nature of the disease, using ad hoc tools - epidemiology, economic consequences, etc. However the production process of these campaigns is then marked by a shift to the individual dimension of health behaviours. How one considers communication reflects the current governmentality. Delivered messages attempt to empower targets in adapting their behaviour. This individual responsibility hides then the existence of risk groups; the social determinants of behaviours give way to the psychologising of social that reduces behaviour to the only individual responsibility. The produced media messages will then try to avoid associating a disease to a particular group, in order to reach as many people as possible, but also not to blame or stigmatize a particular part of the population. Therefore, inspired by the collective dimension of disease, public health messages, however, choose individual media process of health behaviours. [less ▲]

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See detailContribution of land use changes to future flood damage along the river Meuse in the Walloon region
Beckers, Arnaud ULg; Dewals, Benjamin ULg; Erpicum, Sébastien ULg et al

in Natural Hazards & Earth System Sciences (2013), 13

Managing flood risk in Europe is a critical issue because climate change is expected to increase flood hazard in many european countries. Beside climate change, land use evolution is also a key factor ... [more ▼]

Managing flood risk in Europe is a critical issue because climate change is expected to increase flood hazard in many european countries. Beside climate change, land use evolution is also a key factor influencing future flood risk. The core contribution of this paper is a new methodology to model residential land use evolution. Based on two climate scenarios (“dry” and “wet”), the method is applied to study the evolution of flood damage by 2100 along the river Meuse. Nine urbanization scenarios were developed: three of them assume a “current trend” land use evolution, leading to a significant urban sprawl, while six others assume a dense urban development, characterized by a higher density and a higher diversity of urban functions in the urbanized areas. Using damage curves, the damage estimation was performed by combining inundation maps for the present and future 100 yr flood with present and future land use maps and specific prices. According to the dry scenario, the flood discharge is expected not to increase. In this case, land use changes increase flood damages by 1–40 %, to EUR 334–462 million in 2100. In the wet scenario, the relative increase in flood damage is 540–630 %, corresponding to total damages of EUR 2.1–2.4 billion. In this extreme scenario, the influence of climate on the overall damage is 3–8 times higher than the effect of land use change. However, for seven municipalities along the river Meuse, these two factors have a comparable influence. Consequently, in the “wet” scenario and at the level of the whole Meuse valley in the Walloon region, careful spatial planning would reduce the increase in flood damage by no more than 11–23 %; but, at the level of several municipalities, more sustainable spatial planning would reduce future flood damage to a much greater degree. [less ▲]

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See detailL’insuffisance mitrale chez le cheval : revue de la littérature et comparaison avec la pathologie chez l’homme et chez le chien
Al Haidar, Ali; Leroux, Aurélia ULg; Amory, Hélène ULg

in Annales de Médecine Vétérinaire (2013), 157(1), 52-68

Abstract Mitral regurgitation (MR) is a one of the most common cardiac disease in the equine species. Furthermore, it is the valvular disease that presents the higher risk to be associated with reduced ... [more ▼]

Abstract Mitral regurgitation (MR) is a one of the most common cardiac disease in the equine species. Furthermore, it is the valvular disease that presents the higher risk to be associated with reduced athletic performance, to evolve into congestive heart failure and to become life threatening. The clinical diagnosis of MR depends mainly on the expertise of the veterinarian in cardiology and is above all based on cardiac auscultation. In all of the cases, the definitive diagnosis and the evaluation of the disease severity require performing a Doppler echocardiographic examination. Signs of left ventricular and/or left atrial overload, large regurgitation jet, pulmonary arterial hypertension or significant arrhythmias are negative prognosis factors. Clinical signs of congestive heart failure make the prognosis worse. Other echocardiographic parameters are used in human and dogs in order to determine the severity of the MR, but have been not validated in horses. Treatment of mitral regurgitation in the equine species is symptomatic and directed against the development of a congestive heart failure. A lot of drugs that are used in human or dogs are of limited value in horses for financial reasons and/or lack of pharmacokinetics and pharmacologic data in equine species. [less ▲]

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See detailCharacterization of clay deposits of Nanga-Eboko (Central Cameroon): Suitability in the production of building materials
Mache, Jacques Richard ULg

in Clay Minerals (2013), 48

Clayey deposits of Nanga-Eboko (Central Cameroon) were studied to assess their potential as building materials. Characterization was performed using XRD, IR, XRF, DTA/DTG and firing. Clays appear as ... [more ▼]

Clayey deposits of Nanga-Eboko (Central Cameroon) were studied to assess their potential as building materials. Characterization was performed using XRD, IR, XRF, DTA/DTG and firing. Clays appear as discontinuous pockets with the same organizational characteristics in three villages located on both sides of the Sanaga River. The average thickness of exploitable layer is about 3m. The estimated tonnage ~7-17x105 m3 can supply an industry of great importance. SiO2 (~70%), Al2O3 (~15%) and Fe2O3 (~4%) are the predominant oxides of the natural clays. Quartz (~55%), kaolinite (~33%), illite (~5%) and K-feldspar (~4%) are major minerals. Clays are not suitable for building construction due to their fine-grained size and high plasticity properties. Firing properties of bricks (950 and 1050°C) are good despite the high shrinkage values. Therefore the addition of "degreasers' is recommended to control shaping and drying. [less ▲]

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See detailEfficiency of inventory plot patterns in quantitative analysis of vegetation : a case study of tropical woodland and dense forest in Benin
Salako, Valère K.; Glele Kakai, Romain L.; Assogbadjo, Achille E. et al

in Southern Forests : a Journal of Forest Science (2013), 75(3), 137-143

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See detailComparative analysis of airglow emissions in terrestrial planets, observed with VIRTIS-M instruments on board Rosetta and Venus Express
Migliorini, A.; Piccioni, G.; Capaccioni, F. et al

in Icarus (2013), 226

Airglow emissions are optimal processes to investigate the chemistry and dynamics in planetary atmospheres. In this study, we focus on the O2 and OH airglow emissions in Venus, Earth, and Mars atmospheres ... [more ▼]

Airglow emissions are optimal processes to investigate the chemistry and dynamics in planetary atmospheres. In this study, we focus on the O2 and OH airglow emissions in Venus, Earth, and Mars atmospheres, which are controlled by chemical reactions common to the three planets. By studying these phenomena on Venus, Earth, and Mars using similar instruments, we are able to derive information about their photochemistry and the physical conditions of the atmospheres, but also to constrain the dynamics responsible for transport of atomic oxygen, ozone and other minor species. After a review of the nightglow emissions observed in the Venus atmosphere, we analyze the O2 and OH airglow emissions in the Earth's atmosphere observed during the 3 swing-bys of our planet by the Rosetta spacecraft. We also report the detection of the O2 nightglow emission in the Mars atmosphere, observed in February 2007 during the Rosetta fly-by of the planet. The airglow characteristics are in agreement with the measurements obtained from sensors on board Mars Express. [less ▲]

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See detailLa fratrie face au "coming-out"
Haxhe, Stéphanie ULg; D'Amore, Salvatore ULg

in Thérapie Familiale (2013), 34(2), 215-230

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See detailGiulio Massimilla (ed.), Callimaco, Aitia. Libro terzo e quarto, «Biblioteca di studi antichi» 92, Pisa/Roma, Fabrizio Serra editore, 2010.
Caneva, Stefano ULg

in Athenaeum : Studii Periodici di Letteratura e Storia (2013), 101.I-II

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See detailGéographies religieuses et migrations postcoloniales: déclinaisons kimbanguistes, pentecôtistes, olangistes en Belgique
Demart, Sarah ULg; Meiers, Bénédicte ULg; Melice, Anne ULg

in African Diaspora : a Journal of Transnational Africa in a Global World (2013), 6(1), 122-149

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See detailPSDC et prise de risque : telle est la question
Dumoulin, André ULg

in revue de défense nationale (2013), (3),

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See detailProposal of a simplified analytical approach for the characterisation of the end-plate component in circular tube connection
Hoang, Van Long ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in Journal of Constructional Steel Research (2013), 90

This paper presents a study realised at Liège University on the behaviour of the rectangular end-plate in bending and the bolt in tension components met in circular tube-to- circular tube connections and ... [more ▼]

This paper presents a study realised at Liège University on the behaviour of the rectangular end-plate in bending and the bolt in tension components met in circular tube-to- circular tube connections and in circular tubular column bases. Analytical formulas for the mentioned components are firstly proposed considering different yield line patterns for the end-plate. Then the results predicted through the proposed analytical approach are validated through comparisons to experimental and finite element results. Finally, the application of the proposed approach for the prediction of the strength of tube-to-tube joints and also for the prediction of the bolt force of column bases is demonstrated. [less ▲]

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See detailImpact of sensor and measurement timing errors on model-based insulin sensitivity
Pretty, Christopher ULg; Signal, Matthew; Fisk, Liam et al

in Computer Methods & Programs in Biomedicine (2013)

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See detailNew 5-Aryl-1H-imidazoles display in vitro antitumor activity against apoptosis-resistant cancer models, including melanomas, through mitochondrial targeting.
Mathieu, Véronique; Van Den Brege, E; Ceusters, Justine ULg et al

in Journal of Medicinal Chemistry (2013), 56(17), 6626-6637

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See detailResponse of Black African patients with hepatitis C virus genotype 4 to treatment with peg-interferon and ribavirin
Nkuize, M; Mulkay, JP; Adler, M et al

in Acta Gastro-Enterologica Belgica (2013), 76

Aim : To compare responses to therapy of Black African (BA) and non-Black African (non- BA) patients with hepatitis C virus genotype 4 (HCV-4) residing in Belgium. Methods : In this retrospective ... [more ▼]

Aim : To compare responses to therapy of Black African (BA) and non-Black African (non- BA) patients with hepatitis C virus genotype 4 (HCV-4) residing in Belgium. Methods : In this retrospective multicenter study, 473 patients with HCV-4 were selected from databases at 7 Belgian centers ; 209 treatment-naïve patients (154 BA) had received treatment with peg-interferon (peg-IFN) plus ribavirin (RBV) and were included in the study. Results : There was a greater percentage of female patients in the BA group than in the non- BA group ; BA patients were also older, had a greater body mass index, and more frequently had abnormal glucose metabolism. The route of contamination was more frequently unknown in BA than in non-BA patients and BA patients had more HCV-4 subtypes. There were no differences in other demographic factors between the groups. Sustained viral response (SVR) and complete early viral response rates were significantly lower and relapse rates significantly higher in BA than in non-BA patients. There were no differences between groups in rates of dose modification or in drug tolerance. Conclusion : In our cohort, treatment-naïve BA patients with HCV-4 who were treated with peg-IFN and ribavirin had a much lower SVR rate than treatment-naïve non-BA patients with HCV- 4 who were treated with peg-IFN and ribavirin, and a higher relapse rate, possibly related to a weaker response to interferonbased therapy. Treatment may need to be adapted in this population. [less ▲]

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See detailThe susceptibility of the knee extensors to eccentric exercise-induced muscle damage is not affected by leg dominance but by exercise order .
Hody, Stéphanie ULg; Rogister, Bernard ULg; Leprince, Pierre ULg et al

in Clinical Physiology & Functional Imaging (2013), 33(5), 373-380

The aims of this study were first to compare the response of dominant and non-dominant legs to eccentric exercise and second, to examine whether there is an effect of exercise order on the magnitude of ... [more ▼]

The aims of this study were first to compare the response of dominant and non-dominant legs to eccentric exercise and second, to examine whether there is an effect of exercise order on the magnitude of symptoms associated with intense eccentric protocols. Eighteen young men performed 3 sets of 30 maximal eccentric isokinetic (60°.sec-1) contractions of the knee extensors (range of motion, ROM: 0°-100°, 0=full extension) using either dominant or nondominant leg. They repeated a similar eccentric bout using the contralateral leg six weeks later. The sequence of leg’s use was allocated to create equally balanced groups. Four indirect markers of muscle damage including subjective pain intensity, maximal isometric strength, muscle stiffness and plasma CK activity were measured before and 24 hours after exercise. All markers changed significantly following the eccentric bout performed either by dominant or non-dominant legs but no significant difference was observed between legs. Interestingly, the comparison between the first and second eccentric bouts revealed that muscle soreness (-42%, p<0.001), CK activity (-62%, p<0.05) and strength loss (-54%, p<0.01) were significantly lower after the second bout. This study suggests that leg dominance does not influence the magnitude of exercise-induced muscle damage and supports for the first time the existence of a contralateral protection against exercise-induced muscle damage in the lower limbs. [less ▲]

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See detail28th CHICAGO GOSPEL MUSIC FESTIVAL
Sacré, Robert ULg

in Blues & Rhythm - The Gospel Truth (2013), (282),

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See detailLa dynastie belge et la science d’Albert Ier à la Commission nationale des sciences (1909-1959)
Pirot, Pascal ULg

in Bulletin d’information de l’Association belge d’histoire contemporaine (2013)

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See detailBlues on the Fox 2013
Sacré, Robert ULg

in Blues & Rhythm - The Gospel Truth (2013), (282),

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See detailBatch mode reinforcement learning based on the synthesis of artificial trajectories
Fonteneau, Raphaël ULg; Murphy, Susan A.; Wehenkel, Louis ULg et al

in Annals of Operations Research (2013), 208(1), 383-416

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See detailPerformance assessment of the FAO AquaCrop model for irrigated cabbage on farmer plots in a semi-arid environment
Wellens, Joost; Raes, Dirk; Traore, Farid et al

in Agricultural Water Management (2013), 127

Small-scale irrigation initiatives are expanding rapidly in Burkina Faso. However, in many cases optimal yields are not being obtained despite the available water and the required nutrient applications ... [more ▼]

Small-scale irrigation initiatives are expanding rapidly in Burkina Faso. However, in many cases optimal yields are not being obtained despite the available water and the required nutrient applications. Local stakeholders need an easy-to-use decision-support tool to assess irrigation water use and its impact on yield. In this study, a water-driven crop model, AquaCrop, developed by FAO, was adapted for cabbage (Brassica oleracea L.) using a limited dataset and leave-one-out cross-validation (LOOCV). The experiment was conducted in south-western Burkina Faso on small irrigated farmer plots, where optimal managerial conditions could not always be guaranteed. Statistical indicators – normalized root mean square error (nRMSE) and index of agreement (d) – suggested that the model is very reliable for simulating cabbage biomass yield and soil water content (low nRMSE and d-index near 1). The relationship between observed and simulated yield produced a d-index of 0.99 and an nRMSE of 1.39% (or 0.59 ton/ha). The comparison between observed and modeled soil water content gave a d-index of 0.90 and an nRMSE of 4.38% (or 9.13 mm). Also of interest was the indirect link between plant density and yield via maximum canopy cover, which can considerably simplify yield estimation. It was concluded that AquaCrop was a very useful tool for enabling local end-users to evaluate and optimize cabbage yield and irrigation water use. [less ▲]

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See detailBordetella pertussis seroprevalence in Belgian adults aged 20–39 years, 2012
Huygen, K; Rodeghiero, C; Govaerts, Daniele et al

in Epidemiology & Infection (2013)

The last report on pertussis seroprevalence in Belgium concerned samples collected during 1993–1994. In the context of the Eupert-Labnet WP6 seroprevalence study (comparing sera from 16 European member ... [more ▼]

The last report on pertussis seroprevalence in Belgium concerned samples collected during 1993–1994. In the context of the Eupert-Labnet WP6 seroprevalence study (comparing sera from 16 European member states), 1500 anonymized leftover diagnostic samples were collected randomly during the second semester of 2012 by the clinical chemistry laboratories of six participating Belgian centres, distributed equally between Flanders, Wallonia and Brussels Capital Region. As suggested by the WP6 organizers, a total of 750 samples (125/centre) were selected from subjects in the 20–29 years age group and 750 samples (125/centre) from subjects in the 30–39 years age group. Anti-PT IgG levels were measured using Virion-Serion ELISA and analysed using predefined cut-off levels. Sixty-one (4%) sera were indicative of an infection in the past 2 years (between 50 and 100 IU/ml) and another 61 (4%) sera had anti-PT IgG antibodies reflecting acute infection (>100 IU/ml). These results highlight the presence of a Bordetella pertussis reservoir in the adult ‘healthy’ Belgian population [less ▲]

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See detailThe applicability of eGFR equations to different populations
DELANAYE, Pierre ULg; Mariat, Christophe

in Nature Reviews Nephrology (2013), 9

The Cockcroft–Gault equation for estimating glomerular filtration rate has been learnt by every generation of medical students over the decades. Since the publication of the Modification of Diet in Renal ... [more ▼]

The Cockcroft–Gault equation for estimating glomerular filtration rate has been learnt by every generation of medical students over the decades. Since the publication of the Modification of Diet in Renal Disease (MDRD) study equation in 1999, however, the supremacy of the Cockcroft–Gault equation has been relentlessly disputed. More recently, the Chronic Kidney Disease Epidemiology (CKD-EPI) consortium has proposed a group of novel equations for estimating glomerular filtration rate (GFR). The MDRD and CKD-EPI equations were developed following a rigorous process, are expressed in a way in which they can be used with standardized biomarkers of GFR (serum creatinine and/or serum cystatin C) and have been evaluated in different populations of patients. Today, the MDRD Study equation and the CKD-EPI equation based on serum creatinine level have supplanted the Cockcroft–Gault equation. In many regards, these equations are superior to the Cockcroft–Gault equation and are now specifically recommended by international guidelines. With their generalized use, however, it has become apparent that those equations are not infallible and that they fail to provide an accurate estimate of GFR in certain situations frequently encountered in clinical practice. After describing the processes that led to the development of the new GFR-estimating equations, this Review discusses the clinical situations in which the applicability of these equations is questioned. [less ▲]

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See detailProteomic Investigation of Aphid Honeydew Reveals an Unexpected Diversity of Proteins
Sabri, Ahmed; Vandermoten, Sophie ULg; Leroy, Pascal et al

in PLoS ONE (2013), 8(9),

Aphids feed on the phloem sap of plants, and are the most common honeydew-producing insects. While aphid honeydew is primarily considered to comprise sugars and amino acids, its protein diversity has yet ... [more ▼]

Aphids feed on the phloem sap of plants, and are the most common honeydew-producing insects. While aphid honeydew is primarily considered to comprise sugars and amino acids, its protein diversity has yet to be documented. Here, we report on the investigation of the honeydew proteome from the pea aphid Acyrthosiphon pisum. Using a two-Dimensional Differential in-Gel Electrophoresis (2D-Dige) approach, more than 140 spots were isolated, demonstrating that aphid honeydew also represents a diverse source of proteins. About 66% of the isolated spots were identified through mass spectrometry analysis, revealing that the protein diversity of aphid honeydew originates from several organisms (i.e. the host aphid and its microbiota, including endosymbiotic bacteria and gut flora). Interestingly, our experiments also allowed to identify some proteins like chaperonin, GroEL and Dnak chaperones, elongation factor Tu (EF-Tu), and flagellin that might act as mediators in the plant-aphid interaction. In addition to providing the first aphid honeydew proteome analysis, we propose to reconsider the importance of this substance, mainly acknowledged to be a waste product, from the aphid ecology perspective. [less ▲]

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