Conclusions: The inferred radial distribution of the plasma temperatures agrees rather well with theoretical expectations. The mass-loss rate and CNO abundances corresponding to our best-fit model also agree quite well with the results of recent studies of ζ Pup in the UV and optical domain. Based on observations collected with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). [less ▲]Detailed reference viewed: 7 (0 ULg) WASP-80b: a gas giant transiting a cool dwarfTriaud, A. H. M. J.; Anderson, D. R.; Collier Cameron, A. et alin Astronomy and Astrophysics (2013), 551We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1 ... [more ▼]We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V = 11.9, K = 8.4). Our analysis shows this is a 0.55 ± 0.04 M[SUB]jup[/SUB], 0.95 ± 0.03 R[SUB]jup[/SUB] gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini[SUB]⋆[/SUB] inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening. Using WASP-South photometric observations, from Sutherland (South Africa), confirmed with the 60 cm TRAPPIST robotic telescope, EulerCam, and the CORALIE spectrograph on the Swiss 1.2 m Euler Telescope, and HARPS on the ESO 3.6 m (Prog ID 089.C-0151), all three located at La Silla Observatory, Chile.Radial velocity and photometric data are available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr(130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A80 [less ▲]Detailed reference viewed: 6 (0 ULg) The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planetsMarmier, M.; Ségransan, D.; Udry, S. et alin Astronomy and Astrophysics (2013), 551Context. Since 1998, a planet-search program around main sequence stars within 50 pc in the southern hemisphere has been carried out with the CORALIE echelle spectrograph at La Silla Observatory. Aims ... [more ▼]Context. Since 1998, a planet-search program around main sequence stars within 50 pc in the southern hemisphere has been carried out with the CORALIE echelle spectrograph at La Silla Observatory. Aims: With an observing time span of more than 14 years, the CORALIE survey is now able to unveil Jovian planets on Jupiter's period domain. This growing period-interval coverage is important for building formation and migration models since observational constraints are still weak for periods beyond the ice line. Methods: Long-term precise Doppler measurements with the CORALIE echelle spectrograph, together with a few additional observations made with the HARPS spectrograph on the ESO 3.6 m telescope, reveal radial velocity signatures of massive planetary companions on long-period orbits. Results: In this paper we present seven new planets orbiting HD 27631, HD 98649, HD 106515A, HD 166724, HD 196067, HD 219077, and HD 220689, together with the CORALIE orbital parameters for three already known planets around HD 10647, HD 30562, and HD 86226. The period range of the new planetary companions goes from 2200 to 5500 days and covers a mass domain between 1 and 10.5 MJup. Surprisingly, five of them present very high eccentricities above e > 0.57. A pumping scenario by Kozai mechanism may be invoked for HD 106515Ab and HD 196067b, which are both orbiting stars in multiple systems. Since the presence of a third massive body cannot be inferred from the data of HD 98649b, HD 166724b, and HD 219077b, the origin of the eccentricity of these systems remains unknown. Except for HD 10647b, no constraint on the upper mass of the planets is provided by Hipparcos astrometric data. Finally, the hosts of these long period planets show no metallicity excess. [less ▲]Detailed reference viewed: 6 (1 ULg) Structural equation models to estimate risk of infection and tolerance to bovine mastitis.Detilleux, Johann ; Theron, Léonard ; Duprez, Jean-Noël et alin Genetics, Selection, Evolution [=GSE] (2013)Detailed reference viewed: 9 (7 ULg) Late Holocene changes in cyanobacterial community structure in maritime Antarctic lakesFernandez-Carazo, Rafael; Verleyen, Elie; Hodgson, Dominic A et alin Journal of Paleolimnology (2013), 50Despite the dominance of cyanobacteria in polar freshwater aquatic ecosystems, little is known about their past biodiversity and response to climate and environmental changes. We explored the use of light ... [more ▼]Despite the dominance of cyanobacteria in polar freshwater aquatic ecosystems, little is known about their past biodiversity and response to climate and environmental changes. We explored the use of light microscopy of microfossils, high performance liquid chromatography of the fossil pigment composition and denaturing gradient gel electrophoresis of fossil 16S rRNA genes to study past and present-day differences in cyanobacterial community structure in response to climate changes in two adjacent maritime Antarctic lakes with contrasting depths (4 and 26 m) and light climates. Light microscopy was of limited use because of degradation of cell structures. Fossil cyanobacterial pigment concentrations were below the detection limits of our method in several sediment samples in the deep lake, but abundant and diverse inthe sediment core from the shallow pond, probably as a consequence of increased light availability and/or a more diverse and abundant benthic cyanobacterial flora. Total carotenoid and chlorophyll concentrations were highest in both lakes between ca. 2,950 and 1,800 cal yr BP, which coincides with the late Holocene climate optimum recognised elsewhere in maritime Antarctica. Cyanobacterial molecular diversity was higher in the top few centimeters of the sediments in both lakes. In deeper sediments, the taxonomic turnover of cyanobacteria appeared to be relatively small in response to past climate anomalies in both lakes, underscoring the broad tolerance of cyanobacteria to environmental variability. This, however, may in part be explained by the low taxonomic resolution obtained with the relatively conserved 16S rRNA gene and/or the preferential preservation of particular taxa. Our results highlight the potential of fossil DNA in lake sediments to study colonization and succession dynamics of lacustrine cyanobacteria and warrant further investigation of the factors that affect preservation of cyanobacterial DNA. [less ▲]Detailed reference viewed: 15 (5 ULg) Histoire orale à Matonge (Bruxelles) : un miroir postcolonialDemart, Sarah in Revue Européenne des Migrations Internationales (2013)This paper investigates the framing of memory associated with a urban district. Formerly « elite », the district of Matonge in Brussels developed at the end of the 1960s- beginning of the 1970s, when no ... [more ▼]This paper investigates the framing of memory associated with a urban district. Formerly « elite », the district of Matonge in Brussels developed at the end of the 1960s- beginning of the 1970s, when no Congolese immigration was identified in Belgium. Converting into an "African " or " multicultural" area, Matonge remains the inevitable place for Congolese meetings and festivals where "another" history can be heard. Grounding on a long-time ethnographical approach, we questioned the history of this district whose territorial frames highlight the original interweaving of Congolese geographies in Belgium and Belgian timelines in DRC (Democratic Republic of Congo, former Zaire). Besides, these narratives expand at the margins of classical circuits of history production and reveal a post-colonial face-to-face with strong continuity with the so-called “parallel development” established by the Belgian colonial order in Congo. [less ▲]Detailed reference viewed: 117 (12 ULg) Kein Ey gleicht dem anderen. Rezension zu "Im Bergwerk der Sprache"Viehöver, Vera in ReLü: Rezensionszeitschrift zur Literaturübersetzung (2013)Detailed reference viewed: 9 (0 ULg) Evaluation of a Model-Based Hemodynamic Monitoring Method in a Porcine Study of Septic ShockRevie, James; Stevenson, David; Chase, J. Geoffrey et alin Computational and Mathematical Methods in Medicine (2013)Detailed reference viewed: 12 (2 ULg) Opérations arithmétiques et symbolisations variées. Partir des démarches informelles des élèves pour donner du sens aux apprentissagesFagnant, Annick in Education et Formation (2013), e-298(01), 23-38Tout en s’appuyant sur certains apports de la psychologie cognitive, le présent article se situe dans la lignée des courants socioculturels qui défendent l’idée d’une co-construction des concepts et des ... [more ▼]Tout en s’appuyant sur certains apports de la psychologie cognitive, le présent article se situe dans la lignée des courants socioculturels qui défendent l’idée d’une co-construction des concepts et des symboles. Il s’intéresse à différents types de symbolisations informelles (comme l’utilisation de matériel manipulable, des doigts ou de représentations dessinées) ou plus formelles (comme le diagramme de Venn, le graphe fléché ou les calculs). Les résultats de deux études empiriques menées en 1ère primaire en Communauté française de Belgique montrent que l’utilisation de matériel manipulable permet aux élèves de résoudre une variété de problèmes mais qu’ils éprouvent d’importantes difficultés à utiliser un symbolisme mathématique conventionnel et à produire un calcul en lien avec les démarches de résolution développées ; l’utilisation de ces symbolisations « mal comprises » pouvant conduire au développement de stratégies superficielles de résolution de problèmes. Par ailleurs, une étude exploratoire indique qu’il est possible de travailler au départ des symbolisations informelles produites par les élèves pour les aider à développer une meilleure compréhension des concepts impliqués et pour tendre progressivement vers des symbolisations mathématiques plus conventionnelles qu’ils devraient ainsi mieux intégrer. [less ▲]Detailed reference viewed: 17 (2 ULg) Evaluation of viability and growth of Acetobacter senegalensis under different stress conditionsShafiei, Rasoul ; Thonart, Philippe ; Delvigne, Frank et alin International Journal of Food Microbiology (2013)Acetic acid bacteria (AAB) are used in production of vinegars. During acetic acid fermentation, AAB encounter various aggressive conditions which may lead to a variety of cellular disorders. Previous ... [more ▼]Acetic acid bacteria (AAB) are used in production of vinegars. During acetic acid fermentation, AAB encounter various aggressive conditions which may lead to a variety of cellular disorders. Previous researches mainly studied the influences of different carbon sources on tolerance of AAB to ethanol and acetic acid. In this study, different techniques were used comparatively to investigate the effects of preadaptation on the ability of A. senegalensis to tolerate ethanol and acetic acid. In general, the carbon sources used for preadaptation of A. senegalensis exhibited significant effects on the tolerance of cells to stressors. Flow-cytometric assessments of preadapted cells in ethanol showed that 87.3% of the cells perform respiration after exposure to a stress medium containing 5% (v/v) ethanol and 3% (w/v) acetic acid. However, 58.4% of these preadapted cells could keep their envelope integrity under the stress condition. They could also grow rapidly (μmax = 0.39/h) in the stress medium (E5A3) with a high yield (>80%). A. senegalensis grown in glucose exhibited a low tolerance to acetic acid. Analysis of their respiration capacity, membrane integrity and culturability revealed that almost all the population were dead after exposure to 5% (v/v) ethanol and 3% (w/v) acetic acid. In contrast, exposure of A. senegalensis preadapted in a mixture of glucose and acetic acid to a stress medium containing 5% (v/v) ethanol and 3% (w/v) acetic acid, exhibited an intact respiration system and cellular membrane integrity in 80.3% and 50.01% of cells, respectively. Moreover, just 24% of these cells could keep their culturability under that stress condition. [less ▲]Detailed reference viewed: 8 (3 ULg) Egg Production Performance of the Local Kabyle Hen and its Crossbreeds with ISA-Brown Strain in Semi-Intensive ConditionsMoula, Nassim ; Mamadou Tandiang, Diaw; Salhi, Abdellah et alin International Journal of Poultry Sciences (2013), 12(3), 148-152A cross between the ISA-Brown industrial strain and an Algerian local (Kabyle) breed was compared with the Algerian local (Kabyle) hen. The comparison during the egg production period was done in ... [more ▼]A cross between the ISA-Brown industrial strain and an Algerian local (Kabyle) breed was compared with the Algerian local (Kabyle) hen. The comparison during the egg production period was done in individual cages, in a ventilated henhouse without any particular isolation. The same commercial diet has been provided over three time periods (35 to 36 weeks, 50 to 51 weeks and 65 to 66 weeks of age). Egg number and body weight at first egg was significantly lower in the Kabyle local breed. Mortality was almost equal during the breeding period and the egg production periods for the two genotypes. The Kabyle hen eggs, in spite of a weight which was lower (43.70 to 53.37 g according to the age), gave yolk to albumen ratio similar to the ISAKAB cross (0.52 to 0.58 according to age). Finally, the ISAKAB cross was better in terms of egg production and egg quality than the local hen, in test conditions. [less ▲]Detailed reference viewed: 29 (10 ULg) Behaviour of bolted flange joints in tubular structures under monotonic, repeated and fatigue loadings I: Experimental testsHoang, Van Long ; Jaspart, Jean-Pierre ; Demonceau, Jean-François in Journal of Constructional Steel Research (2013), 85This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590 ... [more ▼]This paper presents a test program on bolted flange plate connections used in circular tubular structures. In the tested joints, the connected tubular elements are made of high strength steel (TS590) whilst normal steel grade (S355) is used for the flanges. The tests were performed under monotonic loadings to obtain the mechanical properties of the connections and under cyclic loadings to characterise the behaviour of these connections for low cycle and high cycle fatigue. The test results are first presented herein, including a critical analysis of the latter; then, designmethods available in literature are applied for the tested configurations with the objective to investigate the accuracy of these methods through comparisons with the experimental results. [less ▲]Detailed reference viewed: 9 (5 ULg) Diet composition of young and adult Northern Grey-headed Sparrow Passer griseus and adult Southern Red Bishop Euplectes orix in BurundiNasasagare, Régine Pacis; Ntakimazi, Gaspard; Libois, Roland in Malimbus (2013), 35(1), 1-10We studied the diet composition of Northern Grey-headed Sparrow Passer griseus and Southern Red Bishop Euplectes orix in four localities of the Rusizi Plain, northwest Burundi. We analyzed crop contents ... [more ▼]We studied the diet composition of Northern Grey-headed Sparrow Passer griseus and Southern Red Bishop Euplectes orix in four localities of the Rusizi Plain, northwest Burundi. We analyzed crop contents of 100 adults from each of the two species and the composition of food brought by parents to nestlings of the sparrow at ten nests. In all four sites, the sparrow’s diet consisted primarily of rice. The bishop also fed mostly on rice grains but also ate Lepidoptera caterpillars, some other insects and wild grass seeds such as Panicum sp. and Brachiaria sp. For adults of both bird species, there was no significant variation in diet throughout the year. However, the diet of young sparrows was much more diverse and changed from the day of hatching until fledging. On the day of hatching, chicks ate mainly caterpillars but by the tenth day, food items comprised one third caterpillars, one third Orthoptera and the rest of other insects including Odonata, Dictyoptera, Isoptera and adult Lepidoptera. After this and until fledging, the chicks were fed increasingly on rice seeds. Simultaneously, the proportion of caterpillars taken gradually decreased until none was fed to the nestlings at the end of the nestling period. The items brought by parents also varied with time of day, with caterpillars and grasshoppers in higher proportions in the morning, decreasing around mid-day and then increasing in the evening. [less ▲] Droit des biensLecocq, Pascale in Revue de Jurisprudence de Liège, Mons et Bruxelles (2013)Detailed reference viewed: 11 (1 ULg) Fifty years of contrasted residue management of an agricultural crop: impacts on the soil carbon budget and on heterotrophic respiration.Buysse, Pauline ; Roisin, Christian; Aubinet, Marc in Agriculture, Ecosystems & Environment (2013), 167Crop management exerts a strong influence on the soil carbon (C) balance. This study investigated a long-term experiment initiated in 1959 at a site in the Hesbaye region of Belgium and focused on three ... [more ▼]Crop management exerts a strong influence on the soil carbon (C) balance. This study investigated a long-term experiment initiated in 1959 at a site in the Hesbaye region of Belgium and focused on three contrasted treatments: residue export (RE), farmyard manure (FYM) addition and residue restitution (RR) after harvest. The objectives were to quantify the components of the C budget of croplands from a 50-year perspective and to identify the impact of the treatments on this budget and soil C sequestration, given the relatively low levels of esidue application. The soil C budget was calculated for each treatment on the basis of total soil organic C (SOC) content measurements and C input data collected since the experiment had begun and drawn from the literature. To evaluate the robustness of this approach, the budget-based output estimates were compared with annual heterotrophic respiration (HR) averages extrapolated from seasonal field HR measurements carried out at the same experimental site in 2010. The soil C budgetbased output estimates accorded well with field-based HR measurements and with most HR estimates in the literature, suggesting that, despite the many uncertainties affecting the soil C budget, these results were robust. The three treatments investigated in this study had different impacts on SOC stocks, mainly during the first 20 years of the experiment. RE and FYM caused significant SOC decreases (on average, −7 ± 5 g C m−2 year−1 over the 50 years) and increases (10 ± 5 g C m−2 year−1), espectively, whereas RR had no significant impact on the SOC stocks. The study also showed (i) the very large part (about twothirds of the total input) that represented the below-ground input, weeds and other left-over residues in the C budget, (ii) the important role probably played by residue quality in C sequestration and (iii) the large proportion of C lost annually rom the soil (which represents 93–98, 100 and 102–107% of the amounts of fresh residue rought to the soil each year in the FYM, RR and RE treatments, respectively). [less ▲]Detailed reference viewed: 4 (2 ULg) Héritage colonial et appropriation du pouvoir d’éduquer. Approche socio-historique du champ de l'éducation primaire en RDCAndre, Géraldine ; Poncelet, Marc in Cahiers de la recherche sur l'éducation et les savoirs (2013), 12Detailed reference viewed: 25 (5 ULg) Role of KOPAKAMA in promoting socio-economic development of coffee farmersGisaro Ca-Madeberi, Ya-Bititi ; Lebailly, Philippe ; Burny, Philippe et alin International NGO Journal (2013), 8(3), 61-67Coffee is the main source of income for a large number of households and provides major foreign currencies for the national economy. Although it covers only 6.3% of cultivated areas, coffee is produced by ... [more ▼]Coffee is the main source of income for a large number of households and provides major foreign currencies for the national economy. Although it covers only 6.3% of cultivated areas, coffee is produced by 500,000 households in Rwanda. Since its introduction in the country in 1904, coffee has always been operated by individual producers. However, after the liberalization of the coffee sector in 1998, the quantity and quality produced are steadily decreasing which affects the price and the income of coffee growers. To search for a solution, the Rwandan government has striven to consolidate coffee growing cooperatives in different parts of the country by building coffee washing stations (CWS). These stations were mainly meant to help coffee growing cooperatives produce high quality coffee which is competitive on the international markets. The goal is to produce a fully washed coffee, exportable and better valued on the international market, which can provide better income for peasant producers. Coffee washing stations are then seen as tools to produce quality coffee and are mainly run by cooperatives, which are structural elements in the rural world. Through these facilities and structures put in place, jobs are created for coffee producers, loans are granted, farmers are motivated due to the increase of income, the market is guaranteed and the prices become attractive for the members. Thus, the socio-economic welfare of coffee growers is improved, which reduces poverty among coffee growers’ households. This study focuses on the analysis of the role resulting from the structuring action of the peasants through CWS and coffee cooperative KOPAKAMA Rutsiro District, Western Province of Rwanda on the socio-economic development and technical assistance of members and the surrounding world. [less ▲]Detailed reference viewed: 18 (11 ULg) Short-term temperature impact on soil heterotrophic respiration in limed agricultural soil samplesBuysse, Pauline ; Goffin, Stéphanie ; Carnol, Monique et alin Biogeochemistry (2013), 112(1-3), 441-455This study sought to investigate the hourly and daily timescale responses of soil CO2 fluxes to temperature in a limed agricultural soil. Observations from different incubation experiments were compared ... [more ▼]This study sought to investigate the hourly and daily timescale responses of soil CO2 fluxes to temperature in a limed agricultural soil. Observations from different incubation experiments were compared with the results of a model combining biotic (heterotrophic respiration) and abiotic (carbonate weathering) components. Several samples were pre-incubated for 8-9 days at three temperatures (5, 15 and 25°C) and then submitted to short-term temperature cycles (where the temperature was increased from 5 to 35°C in 10°C stages, with each stage being 3 h long). During the temperature cycles (hourly timescale), the soil CO2 fluxes increased significantly with temperature under all pre-incubation temperature treatments. A hysteresis effect and negative fluxes during cooling phases were also systematically observed. At a given hourly timescale temperature, there was a negative relationship of the CO2 fluxes with the pre-incubation temperature. Using the combined model allowed the experimental results to be clearly described, including the negative fluxes and the hysteresis effect, showing the potentially large contribution of abiotic fluxes to total fluxes in limed soils, after short-term temperature changes. The fairly good agreement between the measured and simulated flux results also suggested that the biotic flux temperature sensitivity was probably unaffected by timescale (hourly or daily) or pre-incubation temperature. The negative relationship of the CO2 fluxes with the pre-incubation temperature probably derived from very labile soil carbon depletion, as shown in the simulations. This was not, however, confirmed by soil carbon measurements, which leaves open the possibility of adaptation within the microbial community. [less ▲]Detailed reference viewed: 54 (14 ULg) Composition chimique et test d’efficacité in vitro des huiles essentielles extraites de feuilles fraîches du basilic commun (Ocimum basilicum) et du basilic tropical (Ocimum gratissimum) sur Salmonella enterica sérotype Oakland et Salmonella enterica sérotype LegonKpodekon, MT; Boko, KC; Mainil, JG et alin Journal de société Ouest-Africaine de Chimie (2013)Detailed reference viewed: 19 (1 ULg) Compte-rendu de l'ouvrage de A. Beyaert-Geslin: Sémiotique du designDondero, Maria Giulia in Interfaces numériques (2013), Vol 1(4), 133-140Detailed reference viewed: 13 (2 ULg) Présence des Congolais à Bruxelles et postcolonialismesDemart, Sarah in Agir par la culture (2013), 33(printemps), Detailed reference viewed: 2 (0 ULg) Relationships between the P status of surface and deep horizons of agricultural soils under various cropping systems and for different soil types: a case study in BelgiumRenneson, Malorie ; Dufey, J.; Legrain, Xavier et alin Soil Use and Management (2013), 29(S1), 103--113Application of phosphorus (P) fertilizers to agricultural soils should be based on sound knowledge about soil P reserves, availability and lability to optimize conditions for plant uptake while limiting P ... [more ▼]Application of phosphorus (P) fertilizers to agricultural soils should be based on sound knowledge about soil P reserves, availability and lability to optimize conditions for plant uptake while limiting P transport to surface waters. This study investigated relationships between parent material (PM), land use and P fractions in agricultural soils at a regional scale. Surface and deep (100–120 cm) soil samples were collected from 120 agricultural sites (240 total samples) and analysed for three P forms (inorganic, organic and available) as well as for additional key properties. Land uses within the study area were continuous cropland, permanent pasture and temporary grassland. The area covered the 12 most common parent types in Wallonia. Mean total P contents were 904 and 401 mg/kg in surface and deep samples, respectively, with a 33% coefficient of variation for both horizons. The organic P fraction represented, on average, 30% of total P, while available P corresponded to 9% of total P. The influence of PM was apparent in both the surface and deep soil samples, while land use influenced only surface properties. The pattern in total P content relative to land use was pasture ≥ cropland ≥ temporary grassland. Correlation analyses highlighted significant relationships between edaphic parameters viz Alox, Feox, CEC, TOC, pH and P content, the main soil parameter being Alox which determines P sorption capacity. An enrichment factor was used to distinguish between geogenic sources and human activities in terms of topsoil P content. [less ▲]Detailed reference viewed: 15 (5 ULg) Evaluation de la diversité de l’entomofaune en cultures maraîchères dans l’est de la ChinePolo Lozano, Damien ; Bosquée, Emilie ; Chevalier Mendes Lopes, Thomas et alin Entomologie Faunistique = Faunistic Entomology (2013), 66Within the framework of research aimed at developing biological control in vegetable crops in Shandong province in China, a pest and associated auxiliary entomophagous insects monitoring was conducted to ... [more ▼]Within the framework of research aimed at developing biological control in vegetable crops in Shandong province in China, a pest and associated auxiliary entomophagous insects monitoring was conducted to determine entomological groups of agricultural interest and compare them to the situation in Belgium. The diversity and abundance of the entomofauna were assessed in potato and zucchini fields between May 9th and June 13th, 2011, using yellow traps and in situ observations on host plants. A total of 36 466 and 34 806 insects were trapped or observed on the plants in zucchini and potato fields, respectively. Ten orders and more than sixty families in each crop were identified. Aphids widely predominated in the traps and exerted a strong pressure on both crops early in the season. Other families of pests have been identified but no specific pest of these two crops and the investigated region is among the collections. [less ▲]Detailed reference viewed: 79 (26 ULg) Health Technology Assessment in Osteoporosis.Hiligsmann, Mickaël ; Kanis, John A.; Compston, Juliet et alin Calcified Tissue International (2013)We review the various aspects of health technology assessment in osteoporosis, including epidemiology and burden of disease, and assessment of the cost-effectiveness of recent advances in the treatment of ... [more ▼]We review the various aspects of health technology assessment in osteoporosis, including epidemiology and burden of disease, and assessment of the cost-effectiveness of recent advances in the treatment of osteoporosis and the prevention of fracture, in the context of the allocation of health-care resources by decision makers in osteoporosis. This article was prepared on the basis of a symposium held by the Belgian Bone Club and the discussions surrounding that meeting and is based on a review and critical appraisal of the literature. Epidemiological studies confirm the immense burden of osteoporotic fractures for patients and society, with lifetime risks of any fracture of the hip, spine, and forearm of around 40 % for women and 13 % for men. The economic impact is also large; for example, Europe's six largest countries spent 31 billion on osteoporotic fractures in 2010. Moreover, the burden is expected to increase in the future with demographic changes and increasing life expectancy. Recent advances in the management of osteoporosis include novel treatments, better fracture-risk assessment notably via fracture risk algorithms, and improved adherence to medication. Economic evaluation can inform decision makers in health care on the cost-effectiveness of the various interventions. Cost-effectiveness analyses suggest that the recent advances in the prevention and treatment of osteoporosis may constitute an efficient basis for the allocation of scarce health-care resources. In summary, health technology assessment is increasingly used in the field of osteoporosis and could be very useful to help decision makers efficiently allocate health-care resources. [less ▲]Detailed reference viewed: 5 (2 ULg) Exploring the origin of magnetic fields in massive stars: II. New magnetic field measurements in cluster and field starsHubrig, S.; Schoeller, M.; Ilyin, I. et alin Astronomy and Astrophysics (2013), 551Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To ... [more ▼]Theories on the origin of magnetic fields in massive stars remain poorly developed, because the properties of their magnetic field as function of stellar parameters could not yet be investigated. To investigate whether magnetic fields in massive stars are ubiquitous or appear only in stars with a specific spectral classification, certain ages, or in a special environment, we acquired 67 new spectropolarimetric observations for 30 massive stars. Among the observed sample, roughly one third of the stars are probable members of clusters at different ages, whereas the remaining stars are field stars not known to belong to any cluster or association. Spectropolarimetric observations were obtained during four different nights using the low-resolution spectropolarimetric mode of FORS2 (FOcal Reducer low dispersion Spectrograph) mounted on the 8-m Antu telescope of the VLT. Furthermore, we present a number of follow-up observations carried out with the high-resolution spectropolarimeters SOFIN mounted at the Nordic Optical Telescope (NOT) and HARPS mounted at the ESO 3.6m between 2008 and 2011. To assess the membership in open clusters and associations, we used astrometric catalogues with the highest quality kinematic and photometric data currently available. The presence of a magnetic field is confirmed in nine stars previously observed with FORS1/2: HD36879, HD47839, CPD-282561, CPD-472963, HD93843, HD148937, HD149757, HD328856, and HD164794. New magnetic field detections at a significance level of at least 3sigma were achieved in five stars: HD92206c, HD93521, HD93632, CPD-468221, and HD157857. Among the stars with a detected magnetic field, five stars belong to open clusters with high membership probability. According to previous kinematic studies, five magnetic O-type stars in our sample are candidate runaway stars. [less ▲]Detailed reference viewed: 4 (2 ULg) Synovite villonodulaire pigmentée du genouSmets, Fanny; KURTH, William ; Crielaard, Jean-Michel et alin Revue Médicale de Liège (2013), 68(3), 104-109This case report is concerned with a 30 year old patient diagnosed with pigmented villonodular synovitis (PVNS) in the knee. The patient underwent an orthopedic surgical operation to remove the lesions ... [more ▼]This case report is concerned with a 30 year old patient diagnosed with pigmented villonodular synovitis (PVNS) in the knee. The patient underwent an orthopedic surgical operation to remove the lesions. PVNS is a rare proliferative disorder, mostly benign and affecting the knee; its aetiology remains unclear. It represents a medical challenge because of non-specific symptoms that delay the diagnosis with a very high rate of recurrence. MRI imaging is necessary to explore the lesions, but the final diagnosis can only be made after anatomopathologic analysis of the excised lesions. When multiple lesions are present, the treatment consists of their excision by arthrotomy, or by arthroscopy if the disease is localized. [less ▲]Detailed reference viewed: 137 (10 ULg) Evaluation of Heat Stress Effects on Production Traits and Somatic Cell Score of Holsteins in a Temperate EnvironmentHammami, Hedi ; Bormann, Jeanne; M'Hamdi, Naceur et alin Journal of Dairy Science (2013), 96(3), 1844-1855This study was aimed to evaluate the degree of thermal stress exhibited by Holsteins under a continental temperate climate. Milk, fat, protein, and somatic cell count test-day records collected between ... [more ▼]This study was aimed to evaluate the degree of thermal stress exhibited by Holsteins under a continental temperate climate. Milk, fat, protein, and somatic cell count test-day records collected between 2000 and 2011 from 23,963 cows in 604 herds were combined with meteorological data from 14 public weather stations in Luxembourg. Daily values of six different thermal indices (TI) weighted in term of temperature, relative humidity, solar radiation, and wind speed were calculated by averaging hourly TI over 24 hours. Heat stress thresholds were firstly identified by a broken-line regression model. Regression models were thereafter applied to quantify milk production losses due to heat stress. The tipping points at which milk and protein yields declined were effectively identified. For fat yield, no valid threshold was identified for any of the studied TI. Daily fat yields tended to decrease steadily with increasing values of TI. Daily somatic cell scores (SCS) pattern was marked by increased values at both lowest and highest TI ranges with a more pronounced reaction to cold stress for apparent temperature indices. Thresholds differed between TI and traits. For production traits, they ranged from 62 (TI1) to 80 (TI3) for temperature-humidity indices (THI) and from 16 (TI5) to 20 (TI6) for apparent temperature indices. Corresponding SCS thresholds were higher and ranged from 66 (TI1) to 82 (TI3) and from 20 (TI5) to 23 (TI6), respectively. The largest milk decline per unit of mild, moderate, and extreme heat stress levels of 0.164, 0.356, and 0.955 kg, respectively, was observed when using the conventional THI (TI1). The highest yearly milk, fat, and protein losses of 54, 5.7, and 4.2 kg respectively were detected by TI2, the THI index that is adjusted for wind speed and solar radiation. The latter index could be considered as the best indicator of heat stress to be used for forecast and herd management in a first step in temperate regions under anticipated climate changes. [less ▲]Detailed reference viewed: 61 (15 ULg) Sleep in the unresponsive wakefulness syndrome and minimally conscious stateCologan, Victor ; Drouot, Xavier; Parapatics, Silvia et alin Journal of Neurotrauma (2013), 30(5), 339-346The goal of our study was to investigate different aspects of sleep, namely the sleep-wake cycle and sleep stages, in the vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally ... [more ▼]The goal of our study was to investigate different aspects of sleep, namely the sleep-wake cycle and sleep stages, in the vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally conscious state (MCS). 24h polysomnography was performed in 20 patients in a UWS (n=10) or in a MCS (n=10) due to brain injury. The data were first tested for the presence of a sleep-wake cycle and the observed sleep patterns were compared to standard scoring criteria. Sleep spindles, slow waves sleep and rapid eye movement sleep were quantified and their clinical value was investigated. According to our results, an electrophysiological sleep-wake cycle was identified in 5 MCS and 3 VS/UWS patients. Sleep stages did not always match the standard scoring criteria which therefore needed to be adapted. Sleep spindles were more present in patients who clinically improved within 6 months. Slow wave sleep was present in 8 MCS and 3 VS/UWS patients but never in the ischemic etiology. Rapid eye movement sleep, and therefore dreaming which is a form of consciousness, was present in all MCS and 3 VS/UWS patients. In conclusion, the presence of alternating periods of eyes-open/eyes-closed cycles does not necessarily imply preserved electrophysiological sleep architecture in the UWS and MCS, contrary to previous definition. The investigation of sleep is a little studied yet simple and informative way to evaluate the integrity of residual brain function in patients with disorders of consciousness with possible clinical diagnostic and prognostic implications. [less ▲]Detailed reference viewed: 153 (9 ULg) Leptospira spp. prevalence in small mammal populations in Cotonou, BeninHouemenou, Gualbert ; Ahmed, A.; Libois, Roland et alin ISRN Epidemiology (2013)The aim of this study was to assess the Leptospira prevalence in small animals in Cotonou, the capital of Benin. Rodents and shrews were captured in urban and periurban settings and determined as species ... [more ▼]The aim of this study was to assess the Leptospira prevalence in small animals in Cotonou, the capital of Benin. Rodents and shrews were captured in urban and periurban settings and determined as species of the genera Rattus, Mastomys, and Crocidura. Kidney specimens of 90 animals were examined using a real-time PCR assay specific for leptospires that belong to pathogenic species. Leptospiral DNA was amplified from kidney tissues ranging from 13.3% (8/60) in Rattus rattus to 100.0% (1/1) in Crocidura spp. with an average of 18.9% (17/90) of the animals caught at 15 locations. Clade-specific Taqman PCR on 10 samples placed six of these within clade 1 comprising the species L. kirschneri, L. interrogans, L. meyeri, and L. noguchii and four within clade 2 consisting of species L. weilii, L. alexanderi, L. borgpetersenii, and L. santarosai. Phylogenetic analysis of partial sequences of the amplicons of seven samples of these 10 samples revealed that four of the clade 1 samples could equally be assigned to L. interrogans and L. kirschneri and three samples fromclade 2 belonged to L. borgpetersenii. Results presented in the paper indicate that small mammals present a major public health risk for acquiring leptospirosis in Cotonou, Benin and will contribute to a raised awareness amongst health care workers and decision makers and hence promote appropriate clinical management of cases. [less ▲]Detailed reference viewed: 31 (3 ULg) Flow-cytometric assessment of damages to Acetobacter senegalensis during freeze-drying process and storageShafiei, Rasoul ; Delvigne, Frank ; Thonart, Philippe in Acetic acid bacteria journal (2013), volume 2(2(s1)), 10Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently ... [more ▼]Downstream processes have great influences on bacterial starter production. Different modifications occur to cellular compounds during freeze-drying process and storage of bacterial starters. Consequently, viability and culturability (multiplication capacity) undergo some changes. In this study, the effects of freeze-drying process and storage conditions were examined on cell envelope integrity, respiration and culturability of Acetobacter senegalensis. Freezing of cells protected with mannitol (20% w/w) did not affect cell multiplication and respiration considerably; however, 19% of cells showed compromised cell envelope after freezing. After drying, 1.96×1011 CFU/g were enumerated, indicating that about 34% of the cells could survive and keep their culturability. Drying of the cells induced further leakage in cell envelope and finally 81% of cells appeared as injured ones; however, 87% of the dried cells maintained their respiration capacity. Storage temperature had significant effect on cell multiplication ability; higher storage temperature (35°C),caused 8.59-log reduction in cell culturability after nine-month period of storage. Collapse of cell envelop integrity and respiration wasobserved at 35°C. At lower storage temperature (4°C), the culturability decreased about one-log reduction after nine months. Cell envelope integrity was subjected to minor changes during a period of nine month-storage at 4°C whereas a heterogeneous population of cells with different respiration capacity emerged at 4°C. These results indicate that a major part of cells undergone drying process and storage entered into viable but non-culturable state. In addition, usage of different culture media didn’t improve resuscitation. Besides, it seems that sub-lethal damages to cell envelope caused uptake of propidium iodide, however these kinds of injuries could not impress cell multiplications and respiration. [less ▲]Detailed reference viewed: 1 (1 ULg) Lateral inhibition in visual cortex of migraine patients between attacksCoppola, Gianluca; Parisi, Vincenzo; Di Lorenzo, Cherubino et alin Journal of Headache & Pain (2013), 14Detailed reference viewed: 4 (0 ULg) Prix Nobel d'Economie et mathématiquesBair, Jacques ; Haesbroeck, Gentiane in Losanges (2013), 20Le Prix Nobel d'Economie 2012 a été décerné aux deux mathématiciens américains Lloyd Shapley et Alvin Roth. Cet événement nous a donné l'occasion de nous pencher quelque peu sur des prix internationaux ... [more ▼]Le Prix Nobel d'Economie 2012 a été décerné aux deux mathématiciens américains Lloyd Shapley et Alvin Roth. Cet événement nous a donné l'occasion de nous pencher quelque peu sur des prix internationaux pouvant être attribués à des mathématiciens. [less ▲]Detailed reference viewed: 2 (1 ULg) Enhanced ALE Data Transfer Strategy for Explicit and Implicit Thermomechanical Simulations of High-Speed ProcessesBoman, Romain ; Ponthot, Jean-Philippe in International Journal of Impact Engineering (2013), 53The Arbitrary Lagrangian Eulerian (ALE) formalism, which allows the computational grid to move regardless of thematerial deformation, is a convenient way to avoid distortedmeshes in finite element ... [more ▼]The Arbitrary Lagrangian Eulerian (ALE) formalism, which allows the computational grid to move regardless of thematerial deformation, is a convenient way to avoid distortedmeshes in finite element simulations. One crucial step of the ALE algorithm is the data transfer between the Lagrangian and the Eulerian meshes. In this paper, an enhanced transfer method is presented. It can handle complex finite elements which are integrated with more than one Gauss point. This method can thus be used either with an explicit or with an implicit time integration scheme. Choosing the adequate order of accuracy and the most appropriate number of physical fields to be transferred is always a compromise between the speed and the precision of the model. For example, some variables may be sometimes ignored during the transfer in order to decrease the CPU time. Therefore, the most effective way to use such an algorithm is demonstrated in this work by revisiting a classical ALE benchmark, the Taylor impact. An implicit thermomechanical ALE simulation of a high-speed tensile test is also presented and is compared to experimental results from the literature. [less ▲]Detailed reference viewed: 20 (6 ULg) L’isolement social chez les personnes de 65 ans et plus en Belgique : sa prévalence et ses déterminantsMaggi, Patrick ; Delye, Samuel ; Vermeulen, Bram et alin Observatoire : Revue d'Action Sociale & Médico-Sociale (2013)L’isolement social en Belgique touche aujourd’hui 23% des 65 ans et plus. Ce phénomène, contrairement à certaines croyances, ne semble pas s’aggraver, mais le vieillissement rapide de notre population ... [more ▼]L’isolement social en Belgique touche aujourd’hui 23% des 65 ans et plus. Ce phénomène, contrairement à certaines croyances, ne semble pas s’aggraver, mais le vieillissement rapide de notre population laisse présager une augmentation de la prévalence des personnes âgées isolées dans les années à venir. Cet article vise à établir la prévalence de l’isolement social en Belgique en 2011, identifier ses déterminants et analyser l’évolution temporelle de la solitude, la forme subjective de l’isolement social. [less ▲]Detailed reference viewed: 17 (3 ULg) Influence of particle shape on size distribution measurements by 3D and 2D image analyses and laser diffractionCalifice, Arnaud ; Michel, Frédéric ; Dislaire, Godefroid et alin Powder Technology (2013), 237This paper highlights the fact that particle size distribution (PSD) is not unique for the same product, and is dependent on the chosen measurement technique, especially for asymmetric shapes. Laser ... [more ▼]This paper highlights the fact that particle size distribution (PSD) is not unique for the same product, and is dependent on the chosen measurement technique, especially for asymmetric shapes. Laser diffraction and 2D image analysis are commonly used PSD measurement techniques. However, the resultsmay not be representative of the true physical dimensions of the particles. The influence of particle shape on PSD results obtained from 2D/3D image analysis and laser diffraction was investigated. Two metallic powders presenting extreme shape properties (round and elongated particles) were analyzed, as well as a blend of the two pure products. 2D image analysis and laser diffraction results were compared to 3D image analysis (measuring the true particle size). This paper compares the PSD results obtained from the three methods. Some commonly used size parameters in image analysis software did not give meaningful results in regard of the true physical dimensions of the particles. The existence of the two populations (products with extremely different shape and size characteristics) could not be identified with such size parameters, and laser diffraction also performed poorly. The PSD obtained from more precise size parameters (image analysis) better corresponded to the true dimensions of the particles. This study highlights the strengths and weaknesses of particle size analysis techniques when studying products presenting diverse particle shapes, and points out that caution is required in the choice of the size parameters, and in the interpretation of PSD results. [less ▲]Detailed reference viewed: 27 (3 ULg) Un regard sur le vaccination, outil de prévention des maladies infectieusesMiermans, Marie-Christine in Santé pour tous (2013), (10), 8-10Detailed reference viewed: 8 (3 ULg) Schmallenberg virus circulation in Belgium in 2012Bayrou, Calixte ; Garigliany, Mutien-Marie ; Cassart, Dominique et alin Veterinary Record : Journal of the British Veterinary Association (2013), 172Field and laboratory observations suggest that Schmallenberg virus was circulating in Belgium during the summer 2012 despite a very high herd immunity. Further studies will be conducted to determine ... [more ▼]Field and laboratory observations suggest that Schmallenberg virus was circulating in Belgium during the summer 2012 despite a very high herd immunity. Further studies will be conducted to determine whether we are observing the last cases of this epizootic or if the above calves announce a transition to endemicity. [less ▲]Detailed reference viewed: 25 (3 ULg) The University of Liège Libraries (Belgium)Renaville, François in Informed Librarian Online (2013)Short description of the University of Liège Libraries: brief history, collections, e-resources, Open Access projects...Detailed reference viewed: 82 (11 ULg) Neuartige Management Tools für Milchviehbetrieb mittels SpektralanalytikArnould, Valérie ; Reding, Romain; Bormann, Jeanne et alin de lëtzebuerger ziichter (2013), 30In den letzten Jahrzenten wurde die Milch- und Fleischproduktion mehr und mehr mit generellen Nachhaltigkeitsfragen in Verbindung gebracht. Sehr oft wird eine bessere Produktionsnachhaltigkeit auch mit ... [more ▼]In den letzten Jahrzenten wurde die Milch- und Fleischproduktion mehr und mehr mit generellen Nachhaltigkeitsfragen in Verbindung gebracht. Sehr oft wird eine bessere Produktionsnachhaltigkeit auch mit ökonomischen Aspekten verbunden. In der Tat liegt die Kunst der modernen Milchproduktion scheinbar vor allem darin, die Produktion (egal ob tier- oder betriebsindividuell) stetig bei möglichst gleichbleibenden oder gar noch geringeren Kosten zu erhöhen. Daneben ist zu bedenken, dass Konsumenten heutzutage neben preislichen Aspekten sehr oft zusätzlich Gesundheitsaspekte ins Spiel bringen, so dass es für Milchbetriebe nicht unwesentlich ist, die Produktion in gewisser Weise diesen Ansprüchen nach zu gestalten. Glücklicherweise können entscheidende Inhaltsstoffe wie der Milchfettgehalt oder das Fettsäuremuster der Milch durch Managementfaktoren wie Zucht, Selektion, Fütterung und Haltungsbedingungen zum Positiven beeinflusst werden und den Anforderungen der Nachfrageseite besser angepasst werden. Genau bei dieser Problematik liegen die Ansatzpunkte der verschiedenen CONVIS Projekte (QuaM, ManageMILK und OptiMIR) im Bereich Spektralanalysen der Milch. [less ▲]Detailed reference viewed: 29 (9 ULg) Clinical Utility of an Epigenetic Assay to Detect Occult Prostate Cancer in Histopathologically Negative Biopsies: Results of the MATLOC Study.Stewart, Grant D.; Van Neste, Leander; DELVENNE, Philippe et alin Journal of Urology (The) (2013), 189(3), 1110-1116PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1 ... [more ▼]PURPOSE: Concern over possible false negative histopathology of prostate biopsies often leads to re-biopsy. A quantitative methylation-specific PCR (QMSP) assay panel, including GSTP1,APC and RASSF1, could serve to increase the sensitivity to detect cancer over pathologic review alone, leading towards a high negative predictive value (NPV) and a decrease of unnecessary repeat biopsies. MATERIALS AND METHODS: The MATLOC (Methylation Analysis To Locate Occult Cancer) study blindly tested archived prostate biopsy needle core tissue samples of 498 subjects from the UK and Belgium with histopathologically negative prostate biopsies followed by either a positive (cases) or negative (controls) repeat biopsy within 30 months. The clinical performance of the epigenetic marker panel, emphasizing NPV, was assessed and cross-validated. Multivariate logistic regression was used to evaluate all risk factors. RESULTS: The epigenetic assay performed on the first, negative biopsies from this retrospective review cohort resulted in an NPV of 90% (95% CI, 87-93%). In a multivariate model, correcting for age, PSA, DRE and histopathological characteristics of the first biopsy, the epigenetic assay proved to be a significant, independent predictor of patient outcome with an odds ratio of 3.17 (95% CI, 1.81-5.53). CONCLUSIONS: A multiplex QMSP assay determining the methylation status of GSTP1,APC and RASSF1is strongly associated with the outcome of a repeat biopsy up to 30 months after an initial negative biopsy in men with suspicion of prostate cancer. The addition of this epigenetic assay could improve the prostate cancer diagnostic process and reduce unnecessary repeat biopsies. [less ▲]Detailed reference viewed: 10 (9 ULg) A dual strategy to cope with high light in Chlamydomonas reinhardtiiAllorent, G; Tokutsu, R; Roach, T et alin Plant Cell (2013), 25(2), 545-557Absorption of light in excess of the capacity for photosynthetic electron transport is damaging to photosynthetic organisms. Several mechanisms exist to avoid photodamage, which are collectively referred ... [more ▼]Absorption of light in excess of the capacity for photosynthetic electron transport is damaging to photosynthetic organisms. Several mechanisms exist to avoid photodamage, which are collectively referred to as nonphotochemical quenching. This term comprises at least two major processes. State transitions (qT) represent changes in the relative antenna sizes of photosystems II and I. High energy quenching (qE) is the increased thermal dissipation of light energy triggered by lumen acidification. To investigate the respective roles of qE and qT in photoprotection, a mutant (npq4 stt7-9) was generated in Chlamydomonas reinhardtii by crossing the state transition–deficient mutant (stt7-9) with a strain having a largely reduced qE capacity (npq4). The comparative phenotypic analysis of the wild type, single mutants, and double mutants reveals that both state transitions and qE are induced by high light. Moreover, the double mutant exhibits an increased photosensitivity with respect to the single mutants and the wild type. Therefore, we suggest that besides qE, state transitions also play a photoprotective role during high light acclimation of the cells, most likely by decreasing hydrogen peroxide production. These results are discussed in terms of the relative photoprotective benefit related to thermal dissipation of excess light and/or to the physical displacement of antennas from photosystem II. [less ▲] La mosaïque pentecôtisteDemart, Sarah in Politique : Revue de Débats (2013)La transformation du paysage religieux de nos villes est une forme de la multiculturalité en acte. Mais celle-ci ne se réduit pas à l’islam qui mobilise la plupart des controverses. Le renouveau religieux ... [more ▼]La transformation du paysage religieux de nos villes est une forme de la multiculturalité en acte. Mais celle-ci ne se réduit pas à l’islam qui mobilise la plupart des controverses. Le renouveau religieux qui se manifeste à l’intérieur des communautés congolaises mérite également l’intérêt. [less ▲]Detailed reference viewed: 1 (0 ULg) Impact of bone marrow-derived mesenchymal stromal cells on experimental xenogeneic graft-versus-host diseaseBruck, France; Belle, Ludovic ; LECHANTEUR, Chantal et alin Cytotherapy (2013), 15(3), 267-279Background aims. Graft-versus-host disease (GVHD) is a life-threatening complication of allogeneic hematopoietic cell transplantation caused by donor T cells reacting against host tissues. Previous ... [more ▼]Background aims. Graft-versus-host disease (GVHD) is a life-threatening complication of allogeneic hematopoietic cell transplantation caused by donor T cells reacting against host tissues. Previous studies have suggested that mesenchymal stromal cells (MSCs) could exert potent immunosuppressive effects. Methods. The ability of human bone marrow derived MSCs to prevent xenogeneic GVHD in non-obese diabetic/severe combined immunodeficient (NOD/SCID) mice and in NOD/SCID/interleukin-2Rg(null) (NSG) mice transplanted with human peripheral blood mononuclear cells (PBMCs) was assessed. Results. Injection of 200 106 human PBMCs intraperitoneally (IP) into sub-lethally (3.0 Gy) irradiated NOD/SCID mice also given anti-asialo GM1 antibodies IP 1 day prior and 8 days after transplantation induced lethal xenogeneic GVHD in all tested mice. Co-injection of 2 106 MSCs IP on day 0 did not prevent lethal xenogeneic GVHD induced by injection of human PBMCs. Similarly, injection of 30 106 human PBMCs IP into sub-lethally (2.5 Gy) irradiated NSG mice induced a lethal xenogeneic GVHD in all tested mice. Injection of 3 106 MSCs IP on days 0, 7, 14 and 21 did not prevent lethal xenogeneic GVHD induced by injection of human PBMCs. Conclusions. Injection of MSCs did not prevent xenogeneic GVHD in these two humanized mice models. [less ▲]Detailed reference viewed: 18 (10 ULg) Le langage olfactif des insectes: un atout pour la lutte biologiqueVerheggen, François in Biofutur (2013), 341Detailed reference viewed: 15 (1 ULg) High-precision CoRoT space photometry and fundamental parameter determination of the B2.5V star HD 48977Thoul, Anne ; Degroote, Pieter; Catala, Claude et alin Astronomy and Astrophysics (2013), 551We present the CoRoT light curve of the bright B2.5V star HD 48977 observed during a short run of the mission in 2008, as well as a high-resolution spectrum gathered with the HERMES spectrograph at the ... [more ▼]We present the CoRoT light curve of the bright B2.5V star HD 48977 observed during a short run of the mission in 2008, as well as a high-resolution spectrum gathered with the HERMES spectrograph at the Mercator telescope. We use several time series analysis tools to explore the nature of the variations present in the light curve. We perform a detailed analysis of the spectrum of the star to determine its fundamental parameters and its element abundances. We find a large number of high-order g-modes, and one rotationally induced frequency. We find stable low-amplitude frequencies in the p-mode regime as well. We conclude that HD 48977 is a new Slowly Pulsating B star with fundamental parameters found to be Teff = 20000 $\pm$ 1000 K and log(g)=4.2 $/pm$ 0.1. The element abundances are similar to those found for other B stars in the solar neighbourhood. HD 48977 was observed during a short run of the CoRoT satellite implying that the frequency precision is insufficient to perform asteroseismic modelling of the star. Nevertheless, we show that a longer time series of this star would be promising for such modelling. Our present study contributes to a detailed mapping of the instability strips of B stars in view of the dominance of g-mode pulsations in the star, several of which occur in the gravito-inertial regime. [less ▲]Detailed reference viewed: 15 (7 ULg) Numerical simulation of a pyramid steel sheet formed by single point incremental forming using solid-shell finite elementsDuchene, Laurent ; Guzmán Inostroza, Carlos Felipe ; Behera, Amar Kumar et alin Key Engineering Materials [=KEM] (2013)Single Point Incremental Forming (SPIF) is an interesting manufacturing process due to its dieless nature and its increased formability compared to conventional forming processes. Nevertheless, the ... [more ▼]Single Point Incremental Forming (SPIF) is an interesting manufacturing process due to its dieless nature and its increased formability compared to conventional forming processes. Nevertheless, the process suffers from large geometric deviations when compared to the original CAD profile. One particular example arises when analyzing a truncated two-slope pyramid. In this paper, a finite element simulation of this geometry is carried out using a newly implemented solid-shell element, which is based on the Enhanced Assumed Strain (EAS) and the Assumed Natural Strain (ANS) techniques. The model predicts the shape of the pyramid very well, correctly representing the springback and the through thickness shear (TTS). Besides, the effects of the finite element mesh refinement, the EAS and ANS techniques on the numerical prediction are presented. It is shown that the EAS modes included in the model have a significant influence on the accuracy of the results. [less ▲]Detailed reference viewed: 42 (16 ULg) New Surface-Enhanced Raman Scattering Platforms: Composite Calcium Carbonate Microspheres Coated with Astralen and Silver NanoparticlesStetciura, Inna Y.; Markin, Alexey V.; Ponomarev, Andrei N. et alin Langmuir (2013)Detailed reference viewed: 22 (1 ULg) Trois cas cliniques d'atteinte de la coiffe des rotateurs : interaction entre l'activité professionnelle et la taille du patient.Pirenne, Danièle ; Mairiaux, Philippe in Presse Médicale (2013)Detailed reference viewed: 5 (2 ULg) Effect of uncertainty in surface mass balance–elevation feedback on projections of the future sea level contribution of the Greenland ice sheet – Part 1: ParameterisationEdwards, T.; Fettweis, Xavier ; Gagliardini, O. et alin Cryosphere Discussions (The) (2013), 7We present a new parameterisation that relates surface mass balance (SMB: the sum of surface accumulation and surface ablation) to changes in surface elevation of the Greenland ice sheet (GrIS) for the ... [more ▼]We present a new parameterisation that relates surface mass balance (SMB: the sum of surface accumulation and surface ablation) to changes in surface elevation of the Greenland ice sheet (GrIS) for the MAR regional climate model. The motivation is to dynamically adjust SMB as the GrIS evolves, allowing us to force ice sheet models with SMB simulated by MAR while incorporating the SMB–elevation feedback, without the substantial technical challenges of coupling the two models. This also allows us to assess the effect of elevation feedback uncertainty on the GrIS contribution to sea level, using multiple global climate and ice sheet models, without the need for additional, expensive MAR simulations. We estimate this relationship separately below and above the equilibrium line altitude (ELA, separating negative and positive SMB) and for regions north and south of 77° N, from a set of MAR simulations in which we alter the ice sheet surface elevation. These give four "SMB lapse rates", gradients that relate SMB changes to elevation changes. We assess uncertainties within a Bayesian framework, estimating probability distributions for each gradient from which we present best estimates and credibility intervals (CIs) that bound 95% of the probability. Below the ELA our gradient estimates are mostly positive, because SMB usually increases with elevation: 0.54 (95% CI: −0.22 to 1.34) kg m−3 a−1 for the north, and 1.89 (1.03 to 2.61) kg m−3 a−1 for the south. Above the ELA the gradients are much smaller: 0.09 (−0.03 to 0.22) kg m−3 a−1 in the north, and 0.06 (−0.07 to 0.56) kg m−3 a−1 in the south, because SMB can either increase or decrease in response to increased elevation. Our statistically based approach allows us to make probabilistic assessments for the effect of elevation feedback uncertainty on sea level projections. In a companion paper we use the best estimates and upper and lower CI bounds in five ice sheet models, and the full probability distributions in another, to adjust simulated SMB from MAR forced by two global climate models for the SRES A1B scenario (Edwards et al., 2013). [less ▲]Detailed reference viewed: 33 (2 ULg) Effect of uncertainty in surface mass balance elevation feedback on projections of the future sea level contribution of the Greenland ice sheet – Part 2: ProjectionsEdwards, T.; Fettweis, Xavier ; Gagliardini, O. et alin Cryosphere Discussions (The) (2013), 7We apply a new parameterisation of the Greenland ice sheet (GrIS) feedback between surface mass balance (SMB: the sum of surface accumulation and surface ablation) and surface elevation in the MAR ... [more ▼]We apply a new parameterisation of the Greenland ice sheet (GrIS) feedback between surface mass balance (SMB: the sum of surface accumulation and surface ablation) and surface elevation in the MAR regional climate model (Edwards et al., 2013) to projections of future climate change using five ice sheet models (ISMs). The MAR climate projections are for 2000–2199, forced by the ECHAM5 and HadCM3 global climate models (GCMs) under the SRES A1B emissions scenario. The additional sea level contribution due to the SMB-elevation feedback averaged over five ISM projections for ECHAM5 and three for HadCM3 is 4.3% (best estimate; 95% credibility interval 1.8–6.9%) at 2100, and 9.6% (best estimate; 95% credibility interval 3.6–16.0%) at 2200. In all results the elevation feedback is significantly positive, amplifying the GrIS sea level contribution relative to the MAR projections in which the ice sheet topography is fixed: the lower bounds of our 95% credibility intervals (CIs) for sea level contributions are larger than the "no feedback" case for all ISMs and GCMs. Our method is novel in sea level projections because we propagate three types of modelling uncertainty – GCM and ISM structural uncertainties, and elevation feedback parameterisation uncertainty – along the causal chain, from SRES scenario to sea level, within a coherent experimental design and statistical framework. The relative contributions to uncertainty depend on the timescale of interest. At 2100, the GCM uncertainty is largest, but by 2200 both the ISM and parameterisation uncertainties are larger. We also perform a~perturbed parameter ensemble with one ISM to estimate the shape of the projected sea level probability distribution; our results indicates that the probability density is slightly skewed towards higher sea level contributions. [less ▲]Detailed reference viewed: 30 (1 ULg) Collisions entre véhicules et animaux en liberté : état des lieux à partir d'une enquête au sein de la policeLehaire, François ; Morelle, Kevin ; Lejeune, Philippe in Forêt Wallonne (2013), 122Les accidents de la route impliquant des animaux sauvages sont de plus en plus nombreux. En se basant sur les données recueillies par les zones de police en Wallonie, il est possible d’avoir une vision ... [more ▼]Les accidents de la route impliquant des animaux sauvages sont de plus en plus nombreux. En se basant sur les données recueillies par les zones de police en Wallonie, il est possible d’avoir une vision plus claire de la problématique. Dans le cas du cerf et du sanglier, il apparaît clairement que la hausse des accidents est liée à l’augmentation de leurs populations. [less ▲]Detailed reference viewed: 34 (24 ULg) Interplay between KLF4 and ZEB2/SIP1 in the regulation of E-cadherin expression.Koopmansch, Benjamin ; Berx, Geert; Foidart, Jean-Michel et alin Biochemical and Biophysical Research Communications (2013), 431(4), 652E-cadherin expression is repressed by ZEB2/SIP1 while it is induced by KLF4. Independent data from the literature indicate that these two transcription factors could bind close to each other in the ... [more ▼]E-cadherin expression is repressed by ZEB2/SIP1 while it is induced by KLF4. Independent data from the literature indicate that these two transcription factors could bind close to each other in the proximal region of the E-cadherin gene promoter. We have here explored a potential competition between ZEB2 and KLF4 for the binding to the E-cadherin promoter. We show an inverse correlation between ZEB2 expression levels and KLF4 recruitment on the E-cadherin promoter in three breast cancer cell lines and in A431/HA.ZEB2 cells in which ZEB2 expression is induced by doxycycline (DOX). We identified a region of the E-cadherin promoter bound by KLF4 which is necessary for the activation of the E-cadherin promoter activity after KLF4 overexpression. This region is localized between positions -28 and -10 and thus overlaps with one of the ZEB2 binding sites. Deleting the bipartite ZEB2 binding site results in increased KLF4 induced E-cadherin promoter activity. Taken together, our results suggest that E-cadherin expression in cancer cells is controlled by a balance between ZEB2 and KLF4 expression levels. [less ▲]Detailed reference viewed: 46 (19 ULg) Le droit à l'assistance d'un avocat est-il un principe général énoncé par la Convention européenne des droits de l'homme ?Michiels, Olivier in Revue de Jurisprudence de Liège, Mons et Bruxelles (2013), (2013/7), 465-471L'article envisage, sous l'angle de l'article 5 de la Convention européenne des droits de l'homme, si l'équité de la procédure pénale est affectée par l'impossibilité légale, pour une personne privée de ... [more ▼]L'article envisage, sous l'angle de l'article 5 de la Convention européenne des droits de l'homme, si l'équité de la procédure pénale est affectée par l'impossibilité légale, pour une personne privée de liberté, d'être assisté d'un avocat. [less ▲]Detailed reference viewed: 24 (3 ULg) Group size of a permanent large group of agile mangabeys (Cercocebus agilis) at Bai Hokou, Central African RepublicDevreese, Lieven; Huynen, Marie-Claude ; Stevens, Jeroen et alin Folia Primatologica : International Journal of Primatology = Internationale Zeitschrift für Primatologie = Journal international de Primatologie (2013), 84Detailed reference viewed: 35 (3 ULg) A cross-sectional study to assess knowledge about HIV/AIDS transmission and prevention measures in company workers in EcuadorCabezas Guerra, Maria del Carmen ; Fornasini, Marco; Dardenne, Nadia et alin BMC Public Health (2013), 13Background: HIV/AIDS was first reported in Ecuador in 1984 and its prevalence has been increasing ever since. In 2009, the National AIDS Program reported 21,810 HIV/AIDS cases and confirmed that the ... [more ▼]Background: HIV/AIDS was first reported in Ecuador in 1984 and its prevalence has been increasing ever since. In 2009, the National AIDS Program reported 21,810 HIV/AIDS cases and confirmed that the worker population was amongst the most affected groups. The objective of this study was to assess knowledge about HIV transmission and prevention measures in company workers in Ecuador. Methods: A cross-sectional survey based on a random sample of 115 companies (1,732 workers), stratified by three large provinces and working sectors (commerce, manufacturing and real estate) was conducted. A validated instrument developed by Family Health International was used to evaluate HIV prevention knowledge and common local misconceptions about HIV transmission. Descriptive statistics, chi square test and logistic regression analysis were performed using SAS. Results: Incorrect knowledge about HIV/AIDS transmission were found in 49.1% (95% CI: 46.6-51.6) of subjects. Incorrect knowledge was higher among males (OR=1.73 [1.39 –2.15]), older subjects (OR=1.35 [1.02 – 1.77]), subjects with lower education (OR=3.72 [2.44 – 5.65]), manual labor workers (OR=2.93 [1.82 – 4.73]) and subjects without previous exposure to HIV intervention programs (OR=2.26 [1.79 – 2.86]). Incorrect knowledge about preventive measures was found among 32.9% (95%CI: 30.6-35.2) of respondents. This proportion was higher among subjects with lower education (OR=2.28 [1.52 – 3.43]), married subjects (OR=1.34 [1.07 – 1.68]), manual labor workers (OR=1.80 [1.34 – 2.42]), and subjects not previously exposed to HIV intervention programs (OR=1.44 [1.14 – 1.83]). Conclusions: HIV intervention programs targeting company workers are urgently needed to improve knowledge and reduce HIV transmission in Ecuador. [less ▲]Detailed reference viewed: 8 (4 ULg) Fluxes of the greenhouse gases (CO2, CH4 and N2O) above a short-rotation poplar plantation after conversion from agricultural landZona, Donatella; Janssens, I.A.; Aubinet, Marc et alin Agricultural and Forest Meteorology (2013), 169The increasing demand for renewable energy may lead to the conversion of millions of hectares into bioenergy plantations with a possible substantial transitory carbon (C) loss. In this study we report on ... [more ▼]The increasing demand for renewable energy may lead to the conversion of millions of hectares into bioenergy plantations with a possible substantial transitory carbon (C) loss. In this study we report on the greenhouse gas fluxes (CO2, CH4, and N2O) measured using eddy covariance of a short-rotation bioenergy poplar plantation converted from agricultural fields. During the first six months after the establishment of the plantation (June–December 2010) there were substantial CO2, CH4, and N2O emissions (a total of 5.36 ± 0.52 Mg CO2eq ha−1 in terms of CO2 equivalents). Nitrous oxide loss mostly occurred during a week-long peak emission after an unusually large rainfall. This week-long N2O emission represented 52% of the entire N2O loss during one and an half years of measurements. As most of the N2O loss occurred in just this week-long period, accurately capturing these emission events are critical to accurate estimates of the GHG balance of bioenergy. While initial establishment (June–December 2010) of the plantation resulted in a net CO2 loss into the atmosphere (2.76 ± 0.16 Mg CO2eq ha−1), in the second year (2011) there was substantial net CO2 uptake (−3.51 ± 0.56 Mg CO2eq ha−1). During the entire measurement period, CH4 was a source to the atmosphere (0.63 ± 0.05 Mg CO2eq ha−1 in 2010, and 0.49 ± 0.05 Mg CO2eq ha−1 in 2011), and was controlled by water table depth. Importantly, over the entire measurement period, the sum of the CH4 and N2O losses was much higher (3.51 ± 0.52 Mg CO2eq ha−1) than the net CO2 uptake (−0.76 ± 0.58 Mg CO2eq ha−1). As water vailability was an important control on the GHG emission of the plantation, expected climate change and altered rainfall pattern could increase the negative environmental impacts of bioenergy. [less ▲]Detailed reference viewed: 13 (0 ULg) Development of an analytical method to detect metabolites of nitrofurans. Application to the study of furazolidone elimination in Vietnamese black tiger shrimp (Penaeus monodon)Douny, Caroline ; Widart, Joëlle ; De Pauw, Edwin et alin Aquaculture (2013), 376-379Nitrofurans, banned antibiotics in European Union (EU), have often been found in imported aquaculture products in the past and are still found nowadays according to the Rapid Alert System for Feed and ... [more ▼]Nitrofurans, banned antibiotics in European Union (EU), have often been found in imported aquaculture products in the past and are still found nowadays according to the Rapid Alert System for Feed and Food (RASFF) of the European Commission. A quantitative method based on liquid chromatography coupled to isotopic dilution tandem mass spectrometry (LC–IDMS/MS) was developed for the determination of the residues of four nitrofuran antibiotic residues in shrimps. The experimental protocol consisted of an acid-catalysed release of protein-bound metabolites, followed by derivatisation with 2-nitrobenzaldehyde (NBA). Then, a double liquid–liquid extraction with ethyl acetate was performed before LC–IDMS/MS analysis by positive electrospray ionisation (ES+) with multiple reaction monitoring (MRM) of two transitions per compound. An “in-house” validation of the method for shrimp analysis was conducted according to the EU criteria for the analysis of veterinary drug residues in foods. The decision limits (CCalpha) were 0.08–0.36 µg kg -1 and the detection capabilities (CCbeta) were 0.12–0.61 µg kg-1, which are both below the minimum required performance limit (MRPL) set at 1 µg kg -1 by the EU. The developed method was applied to evaluate the elimination of furazolidone residues in shrimp muscles after a contamination experiment. After 28 days of decontamination, a concentration of 115 µg kg-1 of furazolidone metabolite 3-amino-2-oxazolidinone (AOZ) was still measured in shrimp muscle. [less ▲]Detailed reference viewed: 21 (3 ULg) Comment on Freemantle et al. : Results of indirect and mixed treatment comparison of fracture efficacy for osteoporosis treatementsBrandi, ML; Reginster, Jean-Yves ; Rizzoli, R et alin Osteoporosis International (2013)Detailed reference viewed: 11 (2 ULg) Light absorption in conical silicon particlesBogdanowicz, J; Gilbert, M; Innocenti, N et alin Optics Express (2013), 21(3), 3891The problem of the absorption of light by a nanoscale dielectric cone is discussed. A simplified solution based on the analytical Mie theory of scattering and absorption by cylindrical objects is proposed ... [more ▼]The problem of the absorption of light by a nanoscale dielectric cone is discussed. A simplified solution based on the analytical Mie theory of scattering and absorption by cylindrical objects is proposed and supported by the experimental observation of sharply localized holes in conical silicon tips after high-fluence irradiation. This study reveals that light couples with tapered objects dominantly at specific locations, where the local radius corresponds to one of the resonant radii of a cylindrical object, as predicted by Mie theory. [less ▲]Detailed reference viewed: 14 (2 ULg) Picturing TranscendanceDondero, Maria Giulia in Image and Narrative. (2013), 13(4), 1-14This paper will examine how two different media, painting and photography, respond inrepresenting the same theme: the theme of religion and transcendence. Four different culturalobjects will be studied in ... [more ▼]This paper will examine how two different media, painting and photography, respond inrepresenting the same theme: the theme of religion and transcendence. Four different culturalobjects will be studied in this light: 1) religious painting, 2) artistic photography with a religioustheme, 3) devotional photography that is transformed into holy images, and 4) the Russian icon. Wewill analyse the filtering effect of these two media in the representation of religious themes. We willseek to explain why the religious theme in painting has been able to assume a sacred dimensionwhich, by contrast, seems unachievable in contemporary artistic photography. [less ▲]Detailed reference viewed: 14 (0 ULg) Important role of the mid-tropospheric atmospheric circulation in the recent surface melt increase over the Greenland ice sheetFettweis, Xavier ; Hanna, Edward; Lang, Charlotte et alin Cryosphere (The) (2013), 7Since 2007, there has been a series of surface melt records over the Greenland ice sheet (GrIS), continuing the trend towards increased melt observed since the end of the 1990's. The last two decades are ... [more ▼]Since 2007, there has been a series of surface melt records over the Greenland ice sheet (GrIS), continuing the trend towards increased melt observed since the end of the 1990's. The last two decades are characterized by an increase of negative phases of the North Atlantic Oscillation (NAO) favouring warmer and drier summers than normal over GrIS. In this context, we use a circulation type classification based on daily 500 hPa geopotential height to evaluate the role of atmospheric dynamics in this surface melt acceleration for the last two decades. Due to the lack of direct observations, the interannual melt variability is gauged here by the summer (June–July–August) mean temperature from reanalyses at 700 hPa over Greenland; analogous atmospheric circulations in the past show that ~70% of the 1993–2012 warming at 700 hPa over Greenland has been driven by changes in the atmospheric flow frequencies. Indeed, the occurrence of anticyclones centred over the GrIS at the surface and at 500 hPa has doubled since the end of 1990's, which induces more frequent southerly warm air advection along the western Greenland coast and over the neighbouring Canadian Arctic Archipelago (CAA). These changes in the NAO modes explain also why no significant warming has been observed these last summers over Svalbard, where northerly atmospheric flows are twice as frequent as before. Therefore, the recent warmer summers over GrIS and CAA cannot be considered as a long-term climate warming but are more a consequence of NAO variability affecting atmospheric heat transport. Although no global model from the CMIP5 database projects subsequent significant changes in NAO through this century, we cannot exclude the possibility that the observed NAO changes are due to global warming. [less ▲]Detailed reference viewed: 43 (3 ULg) Migraine prevention with a supraorbital transcutaneous stimulator. A randomized controlled trial.Schoenen, Jean ; Vandersmissen, Bart; Jeangette, Sandrine et alin Neurology (2013), 80Detailed reference viewed: 48 (1 ULg) Current crowding effects in superconducting corner-shaped Al microstripsAdami, Obaïd-Allah ; Cerbu, Dorin; Cabosart, Damien et alin Applied Physics Letters (2013)The superconducting critical current of corner-shaped Al superconducting microstrips has been investigated. We demonstrate that the sharp turns lead to asymmetric vortex dynamics, allowing for easier ... [more ▼]The superconducting critical current of corner-shaped Al superconducting microstrips has been investigated. We demonstrate that the sharp turns lead to asymmetric vortex dynamics, allowing for easier penetration from the inner concave angle than from the outer convex angle. This effect is evidenced by a rectification of the voltage signal otherwise absent in straight superconducting strips. At low magnetic fields, an enhancement of the critical current with increasing magnetic field is observed for a particular combination of field and current polarity, confirming a theoretically predicted competing interplay of superconducting screening currents and applied currents at the inner side of the turn. [less ▲]Detailed reference viewed: 64 (49 ULg) Compte rendu de Boschetti (Anna) (dir.), L’espace culturel transnational.Bertrand, Charlotte in COnTEXTES : Revue de Sociologie de la Littérature (2013)Detailed reference viewed: 28 (4 ULg) TIC et innovation dans les pratiques enseignantes au CamerounBeche, Emmanuel in Frantice.net (2013), (6), 5-21Cet article étudie l’innovation technologique dans les pratiques enseignantes au Cameroun. Il rend ainsi compte des pratiques techno-pédagogiques, à partir de l’examen d’une série de 84 entrevues menées ... [more ▼]Cet article étudie l’innovation technologique dans les pratiques enseignantes au Cameroun. Il rend ainsi compte des pratiques techno-pédagogiques, à partir de l’examen d’une série de 84 entrevues menées avec des enseignants issus de sept établissements pilotes d’intégration pédagogique des TIC. Dans ce contexte, l’innovation s’intègre davantage dans la recherche documentaire et la préparation des cours. Les autres tâches techno-pédagogiques apparaissent alors minoritaires. De façon générale, considérées comme outils pédagogiques, les TIC n’occupent pas encore une place centrale en enseignement-apprentissage dans ce contexte. Cela pose alors la question de l’équipement technologique des écoles et de la formation techno-pédagogique des enseignants dans une perspective qui allie à la fois diffusion, adoption et appropriation des technologies. [less ▲]Detailed reference viewed: 45 (4 ULg) Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant starsMiglio, A.; Chiappini, C.; Morel, Thierry et alin Monthly Notices of the Royal Astronomical Society (2013), 429Our understanding of how the Galaxy was formed and evolves is severely hampered by the lack of precise constraints on basic stellar properties such as distances, masses and ages. Here, we show that solar ... [more ▼]Our understanding of how the Galaxy was formed and evolves is severely hampered by the lack of precise constraints on basic stellar properties such as distances, masses and ages. Here, we show that solar-like pulsating red giants represent a well-populated class of accurate distance indicators, spanning a large age range, which can be used to map and date the Galactic disc in the regions probed by observations made by the CoRoT and Kepler space telescopes. When combined with photometric constraints, the pulsation spectra of such evolved stars not only reveal their radii, and hence distances, but also provide well-constrained estimates of their masses, which are reliable proxies for the ages of the stars. As a first application, we consider red giants observed by CoRoT in two different parts of the Milky Way, and determine precise distances for ˜2000 stars spread across nearly 15 000 pc of the Galactic disc, exploring regions which are a long way from the solar neighbourhood. We find significant differences in the mass distributions of these two samples which, by comparison with predictions of synthetic models of the Milky Way, we interpret as mainly due to the vertical gradient in the distribution of stellar masses (hence ages) in the disc. In the future, the availability of spectroscopic constraints for this sample of stars will not only improve the age determination, but also provide crucial constraints on age-velocity and age-metallicity relations at different Galactocentric radii and heights from the plane. [less ▲]Detailed reference viewed: 18 (2 ULg) Cost-effectiveness of strontium ranelate in the treatment of male osteoporosis.Hiligsmann, Mickaël ; Ben Sedrine, Wafa ; Bruyère, Olivier et alin Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA (2013)The results of this study suggest that, under the assumption of same relative risk reduction of fractures in men as for women, strontium ranelate could be considered a cost-effective strategy compared ... [more ▼]The results of this study suggest that, under the assumption of same relative risk reduction of fractures in men as for women, strontium ranelate could be considered a cost-effective strategy compared with no treatment for the treatment of osteoporotic men from a Belgian healthcare payer perspective. INTRODUCTION: This study was conducted to estimate the cost-effectiveness of strontium ranelate in the treatment of osteoporotic men. METHODS: A previously validated Markov microsimulation model was adapted to estimate the cost (2,010) per quality-adjusted life-year (QALY) gained of strontium ranelate compared with no treatment. Similar efficacy data on lumbar spine and femoral neck bone mineral density (BMD) between men with osteoporosis at high risk of fracture (MALEO Trial) and postmenopausal osteoporotic women (pivotal SOTI, TROPOS trials) supports the assumption, in the base-case analysis, of the same relative risk reduction of fractures in men as for women. Analyses were conducted, from a Belgian healthcare payer perspective, in the population from the MALEO Trial who is a men population with a mean age of 73 years, and BMD T-score 49,798 and 25,584 per QALY gained using efficacy data from the intent-to-treat analysis and the per-protocol analysis including only adherent patients, respectively. In men with a BMD T-score 45,000 and 25,000 per QALY gained based on efficacy data from the entire population of the clinical trial and from the per-protocol analyses, respectively. CONCLUSIONS: The results of this study suggest that, under the assumption of same relative risk reduction of fractures in men as for women, strontium ranelate could be considered cost-effective compared with no treatment for male osteoporosis. [less ▲]Detailed reference viewed: 4 (1 ULg) The 2.35 year itch of Cyg OB2 #9. II. Radio monitoringBlomme, R.; Nazé, Yaël ; Volpi, D. et alin Astronomy and Astrophysics (2013), 550Cyg OB2 #9 is one of a small set of non-thermal radio emitting massive O-star binaries. The non-thermal radiation is due to synchrotron emission in the colliding-wind region. Cyg OB2 #9 was only recently ... [more ▼]Cyg OB2 #9 is one of a small set of non-thermal radio emitting massive O-star binaries. The non-thermal radiation is due to synchrotron emission in the colliding-wind region. Cyg OB2 #9 was only recently discovered to be a binary system and a multiwavelength campaign was organized to study its 2011 periastron passage. We want to better determine the parameters of this system and model the wind-wind collision. This will lead to a better understanding of the Fermi mechanism that accelerates electrons up to relativistic speeds in shocks, and its occurrence in colliding-wind binaries. We report here on the results of the radio observations obtained in the monitoring campaign and present a simple model to interpret the data. We used the Expanded Very Large Array (EVLA) radio interferometer to obtain 6 and 20 cm continuum fluxes during the Cyg OB2 #9 periastron passage in 2011. We introduce a simple model to solve the radiative transfer in the stellar winds and the colliding-wind region, and thus determine the expected behaviour of the radio light curve. The observed radio light curve shows a steep drop in flux sometime before periastron. The fluxes drop to a level that is comparable to the expected free-free emission from the stellar winds, suggesting that the non-thermal emitting region is completely hidden at that time. After periastron passage, the fluxes slowly increase. We use the asymmetry of the light curve to show that the primary has the stronger wind. This is somewhat unexpected if we use the astrophysical parameters based on theoretical calibrations. But it becomes entirely feasible if we take into account that a given spectral type – luminosity class combination covers a range of astrophysical parameters. The colliding-wind region also contributes to the free-free emission, which can help to explain the high values of the spectral index seen after periastron passage. Combining our data with older Very Large Array (VLA) data allows us to derive a period P = 860:0 3:7 days for this system. With this period, we update the orbital parameters that were derived in the first paper of this series. A simple model introduced to explain only the radio data already allows some constraints to be put on the parameters of this binary system. Future, more sophisticated, modelling that will also include optical, X-ray and interferometric information will provide even better constraints. [less ▲]Detailed reference viewed: 11 (4 ULg) MOA-2010-BLG-523: "Failed Planet" = RS CVn StarGould, A.; Yee, J. C.; Bond, I. A. et alin Astrophysical Journal (2013), 763The Galactic bulge source MOA-2010-BLG-523S exhibited short-term deviations from a standard microlensing light curve near the peak of an A [SUB]max[/SUB] ~ 265 high-magnification microlensing event. The ... [more ▼]The Galactic bulge source MOA-2010-BLG-523S exhibited short-term deviations from a standard microlensing light curve near the peak of an A [SUB]max[/SUB] ~ 265 high-magnification microlensing event. The deviations originally seemed consistent with expectations for a planetary companion to the principal lens. We combine long-term photometric monitoring with a previously published high-resolution spectrum taken near peak to demonstrate that this is an RS CVn variable, so that planetary microlensing is not required to explain the light-curve deviations. This is the first spectroscopically confirmed RS CVn star discovered in the Galactic bulge. Based on observations made with the European Southern Observatory telescopes, Program ID 85.B-0399(I). [less ▲]Detailed reference viewed: 11 (4 ULg) An interferometric study of the Fomalhaut inner debris disk II. Keck Nuller mid-infrared observationsMennesson, B.; Absil, Olivier ; Lebreton, J. et alin Astrophysical Journal (2013), 763We report on high contrast mid-infrared observations of Fomalhaut obtained with the Keck Interferometer Nuller (KIN) showing a small resolved excess over the level expected from the stellar photosphere ... [more ▼]We report on high contrast mid-infrared observations of Fomalhaut obtained with the Keck Interferometer Nuller (KIN) showing a small resolved excess over the level expected from the stellar photosphere. The measured null excess has a mean value of 0.35% +/- 0.10% between 8 and 11 microns and increases from 8 to 13 microns. Given the small field of view of the instrument, the source of this marginal excess must be contained within 2AU of Fomalhaut. This result is reminiscent of previous VLTI K-band observations, which implied the presence of a ~ 0.88% excess, and argued that thermal emission from hot dusty grains located within 6 AU from Fomalhaut was the most plausible explanation. Using a parametric 2D radiative transfer code and a Bayesian analysis, we examine different dust disk structures to reproduce both the near and mid-infrared data simultaneously. While not a definitive explanation of the hot excess of Fomalhaut, our model suggests that the most likely inner few AU disk geometry consists of a two-component structure, with two different and spatially distinct grain populations. The 2 to 11 microns data are consistent with an inner hot ring of very small (~ 10 to 300 nm) carbon-rich grains concentrating around 0.1AU. The second dust population consists of larger grains (size of a few microns to a few tens of microns) located further out in a colder region where regular astronomical silicates could survive, with an inner edge around 1AU. From a dynamical point of view, the presence of the inner concentration of sub-micron sized grains is surprising, as such grains should be expelled from the inner planetary system by radiation pressure within only a few years. This could either point to some inordinate replenishment rates (e.g. many grazing comets coming from an outer reservoir) or to the existence of some braking mechanism preventing the grains from moving out. [less ▲]Detailed reference viewed: 24 (3 ULg) A Detailed X-Ray Investigation of ζ Puppis. II. The Variability on Short and Long TimescalesNazé, Yaël ; Oskinova, Lidia M.; Gosset, Eric in The Astrophysical Journal (2013), 763Stellar winds are a crucial component of massive stars, but their exact properties still remain uncertain. To shed some light on this subject, we have analyzed an exceptional set of X-ray observations of ... [more ▼]Stellar winds are a crucial component of massive stars, but their exact properties still remain uncertain. To shed some light on this subject, we have analyzed an exceptional set of X-ray observations of ζ Puppis, one of the closest and brightest massive stars. The sensitive light curves that were derived reveal two major results. On the one hand, a slow modulation of the X-ray flux (with a relative amplitude of up to 15% over 16 hr in the 0.3-4.0 keV band) is detected. Its characteristic timescale cannot be determined with precision, but amounts from one to several days. It could be related to corotating interaction regions, known to exist in ζ Puppis from UV observations. Hour-long changes, linked to flares or to the pulsation activity, are not observed in the last decade covered by the XMM observations; the 17 hr tentative period, previously reported in a ROSAT analysis, is not confirmed either and is thus transient, at best. On the other hand, short-term changes are surprisingly small (<1% relative amplitude for the total energy band). In fact, they are compatible solely with the presence of Poisson noise in the data. This surprisingly low level of short-term variability, in view of the embedded wind-shock origin, requires a very high fragmentation of the stellar wind, for both absorbing and emitting features (>10[SUP]5[/SUP] parcels, comparing with a two-dimensional wind model). This is the first time that constraints have been placed on the number of clumps in an O-type star wind and from X-ray observations. Based on observations collected with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). [less ▲]Detailed reference viewed: 12 (0 ULg) Flux and color variations of the doubly imaged quasar UM673Ricci, Davide ; Elyiv, Andrii ; Finet, François et alin Astronomy and Astrophysics (2013)With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multi-epoch and multi-band ... [more ▼]With the aim of characterizing the flux and color variations of the multiple components of the gravitationally lensed quasar UM673 as a function of time, we have performed multi-epoch and multi-band photometric observations with the Danish 1.54m telescope at the La Silla Observatory. The observations were carried out in the VRi spectral bands during four seasons (2008--2011). We reduced the data using the PSF (Point Spread Function) photometric technique as well as aperture photometry. Our results show for the brightest lensed component some significant decrease in flux between the first two seasons (+0.09/+0.11/+0.05 mag) and a subsequent increase during the following ones (-0.11/-0.11/-0.10 mag) in the V/R/i spectral bands, respectively. Comparing our results with previous studies, we find smaller color variations between these seasons as compared with previous ones. We also separate the contribution of the lensing galaxy from that of the fainter and close lensed component. [less ▲]Detailed reference viewed: 21 (11 ULg) Accurate spectroscopic parameters of WASP planet host starsDoyle, Amanda P.; Smalley, B.; Maxted, P. F. L. et alin Monthly Notices of the Royal Astronomical Society (2013), 428(4), 3164-3172We have made a detailed spectral analysis of eleven Wide Angle Search for Planets (WASP) planet host stars using high signal-to-noise (S/N) HARPS spectra. Our line list was carefully selected from the ... [more ▼]We have made a detailed spectral analysis of eleven Wide Angle Search for Planets (WASP) planet host stars using high signal-to-noise (S/N) HARPS spectra. Our line list was carefully selected from the spectra of the Sun and Procyon, and we made a critical evaluation of the atomic data. The spectral lines were measured using equivalent widths. The procedures were tested on the Sun and Procyon prior to be being used on the WASP stars. The effective temperature, surface gravity, microturbulent velocity and metallicity were determined for all the stars. We show that abundances derived from high S/N spectra are likely to be higher than those obtained from low S/N spectra, as noise can cause the equivalent width to be underestimated. We also show that there is a limit to the accuracy of stellar parameters that can be achieved, despite using high S/N spectra, and the average uncertainty in effective temperature, surface gravity, microturbulent velocity and metallicity is 83 K, 0.11 dex, 0.11 km/s and 0.10 dex respectively. [less ▲]Detailed reference viewed: 11 (0 ULg) La politique étrangère d'Obama: changement dans la continuitéSantander, Sébastian in Revue Nouvelle (2013), 12Le présent article propose une réflexion autour de la politique étrangère menée par la première administration Obama. La question qui guide cette recherche est la suivante: la politique étrangère d'Obama ... [more ▼]Le présent article propose une réflexion autour de la politique étrangère menée par la première administration Obama. La question qui guide cette recherche est la suivante: la politique étrangère d'Obama se distancie t-elle de celle menée sous l'administration Bush? L’hypothèse soutenue est que la politique étrangère d’Obama se distingue par le prolongement voire l’accentuation des politiques antérieures. Afin de vérifier cette hypothèse, l'article revient sur la doctrine Obama (smart power) et la confronte à la réalité en analysant la stratégie de lutte contre le terrorisme, la politique au Proche-Orient (dossier israélo-Palestinien), les rapports avec les puissances émergentes (Russie, Chine-Asie) ainsi qu'avec l'Europe, l'Amérique latine et l'Afrique. [less ▲]Detailed reference viewed: 48 (17 ULg) Naar een ethisch verantwoorde nanotechnologie? Over de plaats van ethiek in het huidige wetenschapsbeleidLaurent, Brice; Van Oudheusden, Michiel in Ethiek & Maatschappij (2013), 14(4), In this article, the authors describe how transhumanist ideas influence science nanotechnology policy in the United States. Subsequently, they distinguish different ways in which policymakers and ... [more ▼]In this article, the authors describe how transhumanist ideas influence science nanotechnology policy in the United States. Subsequently, they distinguish different ways in which policymakers and scientists, both in the US and in Europe, address social and ethical implications of nanotechnology research and development. They discern two dominant approaches to responsible technology development: a rationalist approach, which separates scientific issues from ethical questions, and a procedural approach, which adheres to guiding moral principles for responsible technology development. They add to this classification an experimental approach, which directly intervenes in scientific practice. By indicating how concerned actors ethicize nanotechnology in different ways, the authors seek to clarify what is meant by ethics in nanotechnology development and incite reflection on the interconnectedness of ethics and new technologies. [less ▲]Detailed reference viewed: 30 (6 ULg) Il coro del re, tra Clitarco e Apollonio Rodio. Considerazioni sul rapporto fra capo e comprimari nella storiografia e nell’epos fra IV e III secolo a.C.Caneva, Stefano in Quaderni di Storia (2013), 77The paper investigates court thiasoi and banquet scenes as well as the general councils of the Macedonian army in the historiography on Alexander and the Successors and in Apollonius’ Argonautica in order ... [more ▼]The paper investigates court thiasoi and banquet scenes as well as the general councils of the Macedonian army in the historiography on Alexander and the Successors and in Apollonius’ Argonautica in order to show parallels in the representation of the relations between the king and his entourage. The studied cases (Alexander in Asia; Ptolemy in Memphis; Jason in the Argonauts’ councils) allow a reappraisal of the work of the historian Cleitarchus and the poet Apollonius Rhodius and show a common portrait of the leader as primus inter pares. In epic as in historiography, the leader is chosen by the hetairoi on the ground of his outstanding leading skills and his role as a religious chief makes him play a function similar to that of a priest in a thiasos. [less ▲]Detailed reference viewed: 31 (4 ULg) Adolescents' self-control. Which impact os Societal Vulnerability and Violent Values ? A gender comparison.Gavray, Claire ; Vettenburg, Nicole; Pauwels, Lieven et alin Journal of Contemporary Criminal Justice (2013), 29(1), 13-31The present study contributes to the study of self-control among adolescents by testing how self-control is affected by societal vulnerability and violent values and by investigating how (in)variant this ... [more ▼]The present study contributes to the study of self-control among adolescents by testing how self-control is affected by societal vulnerability and violent values and by investigating how (in)variant this relationship is for boys and girls. The Belgian International Self-Report Delinquency Study (ISRD-2) data were used to assess to what extent positive attitudes toward violence can be seen as mediators in the relationship between societal vulnerability and self-control. The findings suggest that violent values mediate the relationship between societal vulnerability and self-control. Despite results indicating higher self-control among females, when conducting the analyses separately by gender, we found that the relationship between societal vulnerability and self-control was very similar for boys and girls. It is concluded that societally vulnerable boys and girls are equally affected by the intermediate mechanism of violent values. [less ▲]Detailed reference viewed: 25 (0 ULg) Satellitenbasiertes KollisionsvermeidungssystemChristen, Fréderic ; Eckstein, Lutz; Katriniok, Alexander et alin ATZelektronik (2013), 01/2013Gegenwärtig entwickelt die RWTH Aachen University im Rahmen des Projekts „Galileo above“ (Anwendungszentrum für bodengebundenen Verkehr) ein Kollisionsvermeidungssystem (Collision Avoidance System, CAS ... [more ▼]Gegenwärtig entwickelt die RWTH Aachen University im Rahmen des Projekts „Galileo above“ (Anwendungszentrum für bodengebundenen Verkehr) ein Kollisionsvermeidungssystem (Collision Avoidance System, CAS) unter Einbeziehung von Galileo-Daten. Die hierfür benötigten Galileo-Signale werden von den im automotiveGATE errichteten Pseudoliten (Pseudo-Satelliten) ausgestrahlt. Das Vorhaben wird von der Raumfahrt-Agentur des Deutschen Zentrums für Luft­ und Raumfahrt e. V. mit Mitteln des Bundeministeriums für Wirtschaft und Technologie (Förderkennzeichen 50 NA 0902) gefördert. Im Rahmen dieses Beitrags werden Erläuterungen zu Perzeption und Sensorfusion, Deeskalationsstrategie und Eingriffsentscheidung sowie zu ersten Testergebnisse bei Auffahrsituationen des CAS gege-ben. [less ▲]Detailed reference viewed: 12 (0 ULg) ObservationsLecocq, Pascale in Journal des Juges de Paix = Tijdschrift van de Vrederecters (2013)Detailed reference viewed: 1 (0 ULg) Platelet-rich plasma application in the management of chronic tendinopathiesKaux, Jean-François ; Crielaard, Jean-Michel in Acta Orthopaedica Belgica (2013), 79(1), 10-15Platelet-rich plasma (PRP) may represent a new therapeutic option for chronic tendinopathies. Platelets release various cytokines and growth factors which promote angiogenesis, tissue remodeling, and ... [more ▼]Platelet-rich plasma (PRP) may represent a new therapeutic option for chronic tendinopathies. Platelets release various cytokines and growth factors which promote angiogenesis, tissue remodeling, and wound healing. We made an exhaustive review of the use of PRP in chronic tendinopathies: epicondylitis, rotator cuff, patellar and calcaneal tendinopathies, and plantar fasciitis. Medline, Embase and Google Scholar were used (until July 31, 2012). Clinical studies about PRP and tendinopathies (in English and French language peer-reviewed journals) were included. Articles with a high level of evidence were considered preferentially. Despite the proven efficacy of PRP on tissue regeneration in experimental studies, there is currently scanty tangible clinical evidence with respect to chronic tendon disorders. The few studies that have been performed appear unlikely to be comparable. Randomized controlled studies with appropriate placebo groups are needed to determine the real effectiveness of PRP for treating chronic musculoskeletal injuries. [less ▲]Detailed reference viewed: 62 (8 ULg) PRoNTo: Pattern Recognition for Neuroimaging ToolboxSchrouff, Jessica ; Rosa, Maria Joao; Rondina, Jane et alin Neuroinformatics (2013)In the past years, mass univariate statistical analyses of neuroimaging data have been complemented by the use of multivariate pattern analyses, especially based on machine learning models. While these ... [more ▼]In the past years, mass univariate statistical analyses of neuroimaging data have been complemented by the use of multivariate pattern analyses, especially based on machine learning models. While these allow an increased sensitivity for the detection of spatially distributed effects compared to univariate techniques, they lack an established and accessible software framework. The goal of this work was to build a toolbox comprising all the necessary functionalities formultivariate analyses of neuroimaging data, based on machine learning models. The “Pattern Recognition for Neuroimaging Toolbox” (PRoNTo) is open-source, cross-platform, MATLAB-based and SPM compatible, therefore being suitable for both cognitive and clinical neuroscience research. In addition, it is designed to facilitate novel contributions from developers, aiming to improve the interaction between the neuroimaging and machine learning communities. Here, we introduce PRoNTo by presenting examples of possible research questions that can be addressed with the machine learning framework implemented in PRoNTo, and cannot be easily investigated with mass univariate statistical analysis. [less ▲]Detailed reference viewed: 115 (36 ULg) ObservationsLecocq, Pascale in Journal des Juges de Paix = Tijdschrift van de Vrederecters (2013)Detailed reference viewed: 9 (2 ULg) Validation methodologies of near infrared spectroscopy methods in pharmaceutical applicationsChavez, Pierre-François ; De Bleye, Charlotte ; Sacre, Pierre-Yves et alin European Pharmaceutical Review (2013), 18(1), 3-6As any analytical methods, a mandatory step at the end of the development of a near infrared spectroscopy (NIRS) method is the validation. This step enables to give enough guarantees that each future ... [more ▼]As any analytical methods, a mandatory step at the end of the development of a near infrared spectroscopy (NIRS) method is the validation. This step enables to give enough guarantees that each future results coming from the application of the method in routine will be closed enough to the true value. However, from the literature, a minority of NIRS methods are thoroughly validated despite of the guidelines published by different group and regulatory authorities to help analyst to adequately decide if his method can be considered as valid. In this context, the aim of this review is to offer a critical overview of the different validation methodologies applied to assess the validity of quantitative methods using near infrared spectroscopy used in the field of pharmacy. [less ▲]Detailed reference viewed: 60 (9 ULg) Experimental investigation of passive/active oxidation behavior of SiC based ceramic thermal protection materials exposed to high enthalpy plasmaSakraker, Isil ; Asma, Cem Ozanin Journal of the European Ceramic Society (2013), 33(2), 351-359The passive/active oxidation behavior of a CVD-SiC coated C/C-SiC thermal protection material of the hypersonic SpaceLiner vehicle is investigated experimentally. For the safety of spacecraft and its ... [more ▼]The passive/active oxidation behavior of a CVD-SiC coated C/C-SiC thermal protection material of the hypersonic SpaceLiner vehicle is investigated experimentally. For the safety of spacecraft and its passengers, it is important to know whether the thermal protection system will experience passive/active oxidation during the vehicle’s entry into Earth’s atmosphere. Active oxidation can promote material loss whereas passive oxidation forms a protective ﬁlm. The high enthalpy ﬂight conditions of SpaceLiner vehicle are duplicated in VKI Plasmatron, where the samples are exposed to high enthalpy plasma and the surface temperatures increase up to 2800 K at various total pressure (2–20 kPa) conditions. Surface temperature proﬁles, visual characteristics, mass changes, emissivity, spectrometer and SEM/EDX data are examined to identify the oxidation transition border of the tested material. A temperature jump is observed in all active oxidation regimes. The experimental results are found to be in good agreement with correlations from the literature. [less ▲]Detailed reference viewed: 7 (1 ULg) Characterization of three new carboxylic ester hydrolases isolated by functional screening of a forest-soil metagenomic libraryBiver, Sophie ; Vandenbol, Micheline in Journal of Industrial Microbiology & Biotechnology (2013), 40(2), 191-200Detailed reference viewed: 30 (11 ULg) Development of a performant method for glucocapparin determination in Boscia senegalensis Lam ex. Poir. : A study of the variabilityGueye, Momar Talla; Seck, Dogo; Diallo, Abdoulaye et alin American Journal of Analytical Chemistry (2013), 4This study describes a glucocapparin determination method. Based on rapeseed determination of glucosinolate (GSL), the equation of the average straight regression line is Y = 100.42X − 0.03 (R2 = 0.9998 ... [more ▼]This study describes a glucocapparin determination method. Based on rapeseed determination of glucosinolate (GSL), the equation of the average straight regression line is Y = 100.42X − 0.03 (R2 = 0.9998). Enzymatic hydrolysis of glucocapparin extracted from leaves and fruits of B. senegalensis, analyzed by SPME-GC-MS confirmed the presence of methylisothiocyanate as the main hydrolysis glucocapparin product. Monitoring glucocapparin contents in B. senegalensis leaves and fruits collected in 4 localities in Senegal showed differences between organs according localities and periods of harvest. Glucocapparin content was very high in dry season particularly in January and the lowest rates were recorded during the rainy period between August and November. [less ▲]Detailed reference viewed: 19 (3 ULg) Classification performance resulting from of 2-meansRuwet, Christel ; Haesbroeck, Gentiane in Journal of Statistical Planning & Inference (2013), 143(2), 408-418The k-means procedure is probably one of the most common nonhierachical clustering techniques. From a theoretical point of view, it is related to the search for the k principal points of the underlying ... [more ▼]The k-means procedure is probably one of the most common nonhierachical clustering techniques. From a theoretical point of view, it is related to the search for the k principal points of the underlying distribution. In this paper, the classification resulting from that procedure for k=2 is shown to be optimal under a balanced mixture of two spherically symmetric and homoscedastic distributions. Then, the classification efficiency of the 2-means rule is assessed using the second order influence function and compared to the classification efficiencies of the Fisher and logistic discriminations. Influence functions are also considered here to compare the robustness to infinitesimal contamination of the 2-means method w.r.t. the generalized 2-means technique. [less ▲]Detailed reference viewed: 54 (10 ULg) A novel mutation in the CUB sequence of matriptase-2 (TMPRSS6) is implicated in iron-resistant iron deficiency anaemia (IRIDA).JASPERS, Aurélie ; CAERS, Jo ; LE GAC, Gerald et alin British Journal of Haematology (2013), 160(4), 564-565Detailed reference viewed: 9 (1 ULg) Geometric minimization of highly symmetric potentialsDegée, Audrey ; Ivanov, Igor ; Keus, Venus in Journal of High Energy Physics [=JHEP] (2013), 2013In non-minimal Higgs mechanisms, one often needs to minimize highly symmetric Higgs potentials. Here we propose a geometric way of doing it, which, surprisingly, is often much more efficient than the ... [more ▼]In non-minimal Higgs mechanisms, one often needs to minimize highly symmetric Higgs potentials. Here we propose a geometric way of doing it, which, surprisingly, is often much more efficient than the usual method. By construction, it gives the global minimum for any set of free parameters of the potential, thus offering an intuitive understanding of how they affect the vacuum expectation values. For illustration, we apply this method to the S_4 and A_4-symmetric three-Higgs-doublet models. We find that at least three recent phenomenological analyses of the A_4-symmetric model used a local, not the global minimum. We discuss coexistence of minima of different types, and comment on the mathematical origin of geometrical CP-violation and on a new symmetry linking different minima. [less ▲]Detailed reference viewed: 15 (1 ULg)