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See detailOrigin and Pulsation of Hot Subdwarfs
Randall, Suzanna K; Fontaine, Gilles; Charpinet, Stéphane et al

in Proceedings of the International Astronomical Union (2014, February), 301

We briefly introduce hot subdwarfs and their evolutionary status before discussing the different types of known pulsators in more detail. Currently, at least six apparently distinct types of variable are ... [more ▼]

We briefly introduce hot subdwarfs and their evolutionary status before discussing the different types of known pulsators in more detail. Currently, at least six apparently distinct types of variable are known among hot subdwarfs, encompassing p- as well as g-mode pulsators and objects in the Galactic field as well as in globular clusters. Most of the oscillations detected can be explained in terms of an iron opacity mechanism, and quantitative asteroseismology has been very successful for some of the pulsators. In addition to helping constrain possible evolutionary scenarios, studies focussing on stellar pulsations have also been used to infer planets and characterize the rotation of the host star. [less ▲]

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See detailG-mode trapping and period spacings in hot B subdwarf stars
Charpinet, Stéphane; Van Grootel, Valérie ULg; Brassard, Pierre et al

in Proceedings of the International Astronomical Union (2014, February), 301

Hot B subdwarfs (sdB) are hot and compact helium core burning stars of nearly half a solar mass that can develop pulsational instabilities driving acoustic and/or gravity modes. These evolved stars are ... [more ▼]

Hot B subdwarfs (sdB) are hot and compact helium core burning stars of nearly half a solar mass that can develop pulsational instabilities driving acoustic and/or gravity modes. These evolved stars are expected to be chemically stratified with an almost pure hydrogen envelope surrounding a helium mantle on top of a carbon/oxygen enriched core. However, the sdB stars pulsating in g-modes show regularities in their observed period distributions that, surprisingly (at first sight), are typical of the behavior of high order g-modes in chemically homogeneous (i.e., non-stratified) stars. This led to a claim that hot B subdwarfs could be much less chemically stratified than previously thought. Here, we reinvestigate trapping effects affecting g-modes in sdB stars. We show that standard stratified models of such stars can also produce nearly constant period spacings in the low frequency range similar to those found in g-mode spectra of sdB stars monitored with Kepler. [less ▲]

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See detailPulsations in white dwarf stars
Fontaine, Gilles; Bergeron, Pierre; Brassard, Pierre et al

in Proceedings of the International Astronomical Union (2014, February), 301

We first present a brief description of the six distinct families of pulsating white dwarfs that are now known. These are all opacity-driven pulsators showing low- to mid-order, low-degree gravity modes ... [more ▼]

We first present a brief description of the six distinct families of pulsating white dwarfs that are now known. These are all opacity-driven pulsators showing low- to mid-order, low-degree gravity modes. We then discuss some recent highlights that have come up in the field of white dwarf asteroseismology. [less ▲]

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See detailSperm Motility and Lactate production at different sperm concentrations
Ponthier, Jérôme ULg; De Tullio, Pascal ULg; Blommaert, Didier ULg et al

in Journal of Equine Veterinary Science (2014, January), 34(1), 75-76

Lactate production is associated with total spermatozoa concentration. It negatively affects preservation of total and progressive motility, showing an effect of by-products of anaerobic metabolism on ... [more ▼]

Lactate production is associated with total spermatozoa concentration. It negatively affects preservation of total and progressive motility, showing an effect of by-products of anaerobic metabolism on long-term storage. Moreover, our data show that non-progressive motile spermatozoa are highly associated to lactate concentration, and thus, anaerobic glycolysis. More studies are required to determine relative contributions of aerobiosis and anaerobiosis to spermatozoa motility under different storage conditions. [less ▲]

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

in La lutte contre les discriminations au regard de l’histoire et de la mémoire coloniales : état des lieux (2014, January)

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See detailUse of automatic stapling device during castration to prevent (re)occurrence of inguinal hernia in horses with large vaginal rings.
Salciccia, Alexandra ULg; de la Rebière de Pouyade, Geoffroy ULg; Ponthier, Jérôme ULg et al

in Journal of Equine Veterinary Science (2014, January), 34(1), 99-100

(Re)ocurrence of inguinal hernia in case of very large vaginal rings may simply be prevented by closure of the vaginal tunic by TA staples during castration by inguinal approach. This method provides a ... [more ▼]

(Re)ocurrence of inguinal hernia in case of very large vaginal rings may simply be prevented by closure of the vaginal tunic by TA staples during castration by inguinal approach. This method provides a good resistance to internal pressure, appears to be safe, fast and easy to perform and may therefore be an interesting alternative to laparoscopic techniques when castration is considered. [less ▲]

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See detailEdging towards better accounting
Schumesch, Patrice ULg

in Accounting and Business Magazine of the Association of Certified Chartered Accountants (2014, January)

The ACCA's International Public Sector Conference explored the direction of public sector reporting, and rebuilding public trust through improved financial reporting. Other speakers included Carla Moordy ... [more ▼]

The ACCA's International Public Sector Conference explored the direction of public sector reporting, and rebuilding public trust through improved financial reporting. Other speakers included Carla Moordy of Monitory UK, Zinga Venner of the World Bank, and Professor Michael Parker of Henley Business School. [less ▲]

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See detailImpact of bone marrow lesion on the progression of knee osteoarthritis in the Sekoia study
Parsons, C; Edwards, MH; Bruyère, Olivier ULg et al

in Osteoporosis International (2014), 25(2), 142

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See detailSome features of bulk melt-textured high-temperature superconductors subjected to alternating magnetic fields
Vanderbemden, Philippe ULg; Molenberg, Isabel ULg; Simeonova, Pavlina et al

in Journal of Physics: Conference Series (2014), 558

Monolithic, large grain, (RE)Ba2Cu3O7 high-temperature superconductors (where RE denotes a rare-earth ion) are known to be able to trap fields in excess of several teslas and represent thus an extremely ... [more ▼]

Monolithic, large grain, (RE)Ba2Cu3O7 high-temperature superconductors (where RE denotes a rare-earth ion) are known to be able to trap fields in excess of several teslas and represent thus an extremely promising competing technology for permanent magnet in several applications, e.g. in motors and generators. In any rotating machine, however, the superconducting permanent magnet is subjected to variable (transient, or alternating) parasitic magnetic fields. These magnetic fields interact with the superconductor, which yields a reduction of the remnant magnetization. In the present work we quantify these effects by analysing selected experimental data on bulk melt-textured superconductors subjected to AC fields. Our results indicate that the non-uniformity of superconducting properties in rather large samples might lead to unusual features and need to be taken into account to analyse the experimental data. We also investigate the evolution of the DC remnant magnetization of the bulk sample when it is subjected to a large number of AC magnetic field cycles, and investigate the experimental errors that result from a misorientation of the sample or a mispositioning of the Hall probe. The time-dependence of the remnant magnetization over 100000 cycles of the AC field is shown to display distinct regimes which all differ strongly from the usual decay due to magnetic relaxation. [less ▲]

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See detailComparison of continuous background in-situ and column integrated CO2 observations at Jungfraujoch with an urban site in the city of Bern
Schibig, Michael; Leuenberger, Markus; Nyfeler, Peter et al

in Geophysical Research Abstracts (2014), 16

A six and a half year (January 2005 to May 2011) comparison of CO2 concentration observations has been performed at Jungfraujoch, Switzerland and the city of Bern using two different measurement ... [more ▼]

A six and a half year (January 2005 to May 2011) comparison of CO2 concentration observations has been performed at Jungfraujoch, Switzerland and the city of Bern using two different measurement techniques run by the University of Bern (UBE) and the University of Liege (UL). The UBE systems at Jungfraujoch and Bern are both combined systems for atmospheric oxygen and CO2 measurements. The cryogenically dried air is analysed for CO2 with a Maihak analyser based on the broad-band infrared absorption technique. The measurement frequency is every second but the final reported data are averages of six minute periods. UL is measuring the solar infrared spectrum since 1950 at Jungfraujoch. On its way through the atmosphere, the solar spectrum is modulated depending on the abundant gas species and their amount in the column. Since some gases like CO2 absorb the solar infrared radiation at particular wavelengths and the extinction is proportional to the gas concentration, it is possible to determine the gas concentration in the column above the sensor. At the conference, we will present the three observational records for the six and a half year period. The results show for all three records a distinct, but different seasonality. The seasonalities of the UL and UBE record at Jungfraujoch are lower than the seasonality in the city of Bern, i.e. 4.5 ppm per year and 9 ppm per year for the column and the in- situ record respectively, whereas the seasonality in the city of Bern is 31 ppm per year. Also the maxima and minima of the Jungfraujoch measurements are delayed by several weeks compared to the measurements in the city of Bern. The annual increase of the CO2 concentration of the UBE and UL records of Jungfraujoch are in good agreement with 1.94 ppm per year and 1.90 ppm per year, respectively. The annual increase of the CO2 concentration at the urban site is a bit higher at 2.01 ppm per year. [less ▲]

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See detailOdanacatib anti-fracture efficacy and safety in postmenopausal women with osteoporosis: results from the phase III long-term odanacatib fracture trial
McClung, MR; Langdahl, B; Papapoulos, S et al

in Arthritis and Rheumatism (2014), 66(11), 987

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See detailPrognostic factors of death among nursing homes residents followed prospectively for a period of 2 years
Buckinx, Fanny ULg; Slomian, Justine ULg; Maquet, Didier ULg et al

in Osteoporosis International (2014), 25(2), 121-122

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See detailQuality of life benefits of knee arthroplasty for osteoarthritis
NEUPREZ, Audrey ULg; François, Garance ULg; KURTH, William ULg et al

in Osteoporosis International (2014), 25(2), 40

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See detailImpact of bone marrow lesion on the progression of knee osteoarthritis in the SEKOIA study
Parsons, C; Edwards, MH; Bruyère, Olivier ULg et al

in Rheumatology (2014), 53(1), 130

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See detailBioactive Intraocular Lens – A Strategy to Control Secondary Cataract
Huang, Yi-Shiang ULg; Bertrand, Virginie ULg; Bozukova, Dimitriya et al

in IFMBE Proceedings (2014), 41

Cataract is the opacity of the lens, causing impairment of vision or even blindness. Today, a surgery is still the only available treatment. The intraocular lens (IOL) is a polymer implant designed to ... [more ▼]

Cataract is the opacity of the lens, causing impairment of vision or even blindness. Today, a surgery is still the only available treatment. The intraocular lens (IOL) is a polymer implant designed to replace the natural lens in the cataract surgery. However, the bioinert materials could not satisfy the unmet need in the secondary cataract control. Posterior capsular opacification (PCO, or Secondary Cataract), characterized by a thick and cloudy layer of lens epithelial cells (LECs), is the most common postoperative complication. In our research, a bioactive molecule is immobilized onto the conventional acrylic hydrophilic polymer pHEMA (Poly(2-hydroxyethyl methacrylate)) using oxygen plasma treatment followed by deposition. The RGD peptide sequence, being well-known for its ability to promote cellular attachment by binding to integrin receptors, is designed to stimulate the adhesion of LECs on the IOL. Our data show the peptide immobilized biomaterial not only exhibits similar optical property, but also reveals enhanced biological properties in cell adhesion and cell morphology maintenance. By means of surface functionalization of IOL to stimulate LECs adhesion, the secondary cataract could be controlled. [less ▲]

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See detailEfficient finite element assembly of high order whitney forms
Marsic, Nicolas ULg; Geuzaine, Christophe ULg

in IET Conference Proceedings (2014)

This paper presents an efficient method for the finite element assembly of high order Whitney elements. We start by reviewing the classical assembly technique and by highlighting the most time consuming ... [more ▼]

This paper presents an efficient method for the finite element assembly of high order Whitney elements. We start by reviewing the classical assembly technique and by highlighting the most time consuming part. Then, we show how this classical approach can be reformulated into a computationally efficient matrix - matrix product. We also address the problem of the basis orientation by considering more than one reference space. We conclude by presenting numerical results on a wave guide problem. [less ▲]

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See detailMultiple myeloma cells instruct myeloid-derived suppressor cells to release pro-angiogenic cytokines
Binsfeld, Marilène ULg; Heusschen, Roy ULg; Lamour, Virginie et al

in Belgian Journal of Hematology (2014)

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See detailAssociation between lean mass and hip bone mineral density
Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg; Slomian, Justine ULg et al

in Arthritis and Rheumatism (2014), 66(11), 95

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See detailLes récits numériques : de nouvelles formes narratives ?
Hurel, Pierre-Yves ULg

in L'espace de publication de Culture Numérique (2014)

Face aux discours techno-enthousiastes sur les innovations des récits numériques, des études de l’hyperfiction cherchent à définir les nouveautés réelles apportées par le média informatique. Cet article ... [more ▼]

Face aux discours techno-enthousiastes sur les innovations des récits numériques, des études de l’hyperfiction cherchent à définir les nouveautés réelles apportées par le média informatique. Cet article s’inscrit dans ce courant en comparant les récits interactifs numériques aux non-numériques, tels que les jeux de rôle, le théâtre expérimental ou les livres dont vous êtes le héros. Cette comparaison se fait en deux temps : d’abord le rapprochement par les caractéristiques narratives, puis la distinction par les spécificités des supports. Elle nuance le caractère nouveau de l’arborescence, de l’émergence, de l’hybridation de l’avatar et de spatialité ; et cherche à déterminer des caractéristiques propres au numérique. [less ▲]

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See detailQuels facteurs sociodémographiques influencent l'attitude des médecins généralistes envers la prévention ?
Vanmeerbeek, Marc ULg; Donneau, Anne-Françoise ULg; Monseur, Christian ULg

in Revue Médicale de Bruxelles (2014), 35(3 (Suppl)), 6

Objectifs En Belgique, les mesures de prévention médicalisées restent inéquitablement distribuées dans plusieurs domaines (vaccins, dépistages, conseil cardio-vasculaire, etc.). Une recherche antérieure ... [more ▼]

Objectifs En Belgique, les mesures de prévention médicalisées restent inéquitablement distribuées dans plusieurs domaines (vaccins, dépistages, conseil cardio-vasculaire, etc.). Une recherche antérieure au moyen d’une échelle d’attitude a mis en évidence trois facteurs pouvant modeler l’attitude des médecins généralistes (MG) envers la prévention : 1. Evaluation de pratique. 2. Sentiment de responsabilité envers la santé des patients. 3. Compétences professionnelles particulières (CPP) : références scientifiques, positionnement dans le système de soins, délégation de tâches à des paramédicaux. Cette étude a cherché à établir des profils de MG par rapport à la prévention, en croisant les scores sur ces trois facteurs et les variables sociodémographiques. Méthode Les réponses des 457 MG répondants à l’échelle d’attitude ont été soumis à des analyses multivariées, en prenant comme variables dépendantes les scores obtenus sur les trois facteurs, et comme variables indépendantes l’ancienneté, le sexe, la langue, le lieu de pratique, le travail dans un centre de prévention (ONE, planning, PSE), le type de pratique (solo ou divers types d’association). Résultats Le type de pratique est le seul déterminant qui influence les 3 facteurs, avec un gradient des pratiques solo vers les maisons médicales, en passant par les associations mono- puis pluridisciplinaires. Les MG ayant moins de 20 ans de pratique ont de meilleurs scores en évaluation et CPP. Les hommes ont de meilleurs scores en évaluation, et les pratiques urbaines se distinguent en CPP. La langue influence tantôt dans un sens tantôt dans l’autre. Il n’y a pas d’influence du fait de travailler dans un centre de prévention. Conclusion Une diffusion plus large et équitable des actes préventifs passe par la prise en compte de facteurs personnels et organisationnels propres aux MG. Les associations pluridisciplinaires semblent mieux préparées pour atteindre cet objectif. [less ▲]

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See detailExploration of unitization processes in episodic memory in Alzheimer's disease
Delhaye, Emma ULg; Salmon, Eric ULg; Bastin, Christine ULg

in Frontiers in Human Neuroscience (2014)

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See detailPercentage of women achieving non-osteoporotic BMD T-scores at the spine and hip over 8 years of denosumab treatment
Ferrari, S; Libanati, C; Lin, CJF et al

in Arthritis and Rheumatism (2014), 66(11), 986-987

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See detailPhotocatalytic degradation of water pollutants with visible light-sensitized TiO2 xerogels
Tasseroul, Ludivine ULg; Pirard, Sophie ULg; Lambert, Stéphanie ULg et al

in Récents Progrès en Génie des Procédés (2014), 106

To extend its photocatalytic activity to visible light, TiO2 has been doped in situ through the cogelation sol-gel proces with two dyes : free metal tetra(4-carboxyphenyl)porphyrin and nickel tetra(4 ... [more ▼]

To extend its photocatalytic activity to visible light, TiO2 has been doped in situ through the cogelation sol-gel proces with two dyes : free metal tetra(4-carboxyphenyl)porphyrin and nickel tetra(4-carboxyphenyl)porphyrin. DR and FT-IR spectroscopies have been performed to determine the interaction between porphyrins and TiO2. Cristallinity and specific surface area have been measured by XRD and N2 adsorption. The photoactivity of the doped TiO2 xerogels has been evaluated for p-nitrophenol (a model water pollutant) degradation under visible light and a kinetic study has been performed. The samples allow the degradation of 40% of p-nitrophenol in 6 h which makes them very promising for water decontamination under natural light. A kinetic study of p-nitrophenol degradation with the Ni-doped catalyst has shown that the best kinetic model involves one type of active site corresponding to the hole h+ of electron-hole pairs created at the TiO2 surface by light. The rate determining step consists of the surface reaction between adsorbed p-nitrophenol and adsorbed OH• radicals. [less ▲]

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See detailGalectins in cancer: jacks of all trades
Heusschen, Roy ULg; Schulkens, Iris; Muller, Joséphine ULg et al

in International Journal of Molecular Medicine (2014)

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See detailEffect of denosumab treatment in postmenopausal women with osteoporosis: eight-year results from the freedom extension, phase 3 clinical trial
Lewieck, E; Papapoulos, S; Lippuner, K et al

in Endocrine Reviews (2014), 35(3), 22-1

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See detailEvaluation du nombre de résidents en maison de retraite médicalisée bénéficiant d'une supplémentation en vitamine D
Buckinx, Fanny ULg; Reginster, Jean-Yves ULg; Cavalier, Etienne ULg et al

in Cahiers de l'Année Gérontologique (Les) (2014), 2(23), 207-63

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See detailStratégies spécialisées d’acquisition de pigments rouges durant le Châtelperronien de la grotte du Renne à Arcy-sur-Cure (Yonne, France)
Salomon, Hélène ULg; Coquinot, Yvan; Beck, Lucile et al

in Paléo (2014), Special issue

Depuis une décennie, les découvertes de matériaux colorants se multiplient parmi les sites dont les occupations remontent au Paléolithique moyen et au Paléolithique supérieur ancien. L’intérêt qu’elles ... [more ▼]

Depuis une décennie, les découvertes de matériaux colorants se multiplient parmi les sites dont les occupations remontent au Paléolithique moyen et au Paléolithique supérieur ancien. L’intérêt qu’elles suscitent tient à ce qu’elles sont susceptibles de révéler des pratiques techniques diverses et complexes, mais il tient aussi à leur forte potentialité à traduire des pratiques symboliques du fait de leur pouvoir colorant intense et des couleurs exploitées : le rouge et le noir. C’est sur le gisement châtelperronien de la grotte du Renne à Arcy-sur-Cure (Yonne), fouillé de 1949 à 1963 par André Leroi-Gourhan, qu'environ 2000 matières colorantes découvertes ont conduit à échafauder des théories concernant leurs transformations et leurs utilisations qui méritaient d’être éprouvées. Il est supposé, depuis leur découverte, qu’elles ont fait l’objet d’un chauffage contrôlé qui visait à en modifier la couleur, le chauffage permettant de transformer les matières colorantes jaunes (hydroxydes de fer) en orangé, en rouge et en violacé (oxydes de fer). De cette hypothèse découle la théorie selon laquelle les Néandertaliens ont exploité les matières colorantes en tant que pigment pour des réalisations symboliques, voire d’ordre esthétique, ce qui n’a pas encore pu être prouvé. La présente étude, fondée sur le croisement des données issues des analyses de la nature physico-chimique et pétrographique des assemblages de matières colorantes, mais aussi sur leur intégration dans le gisement, en association avec des structures d’habitat dont la conservation est exceptionnelle, et sur une série d’expérimentations visant à caractériser les poudres obtenues par différents moyens a permis de définir les choix techniques qui ont présidé à l’approvisionnement en matières colorantes dans tous les niveaux d’occupation châtelperroniens de la grotte du Renne. Il a ainsi été possible de démontrer qu’aucune des matières colorantes, rouges ou noires, n’a fait l’objet d’un chauffage préalablement à son utilisation, bien au contraire de ce qui avait été supposé jusqu’ici. Ces matières colorantes ont fait l’objet d’un approvisionnement raisonné auprès de formations géologiques affleurant ponctuellement. L’exploitation de ces gîtes de matières premières colorantes a été la même durant toute la séquence châtelperronienne et s’est orientée préférentiellement vers des matériaux que l’on peut aisément réduire en poudre. L’assemblage des matières colorantes de la grotte du Renne révèle à la fois une permanence des pratiques techniques et culturelles qui ont trait à l’emploi de matières colorantes et un profond ancrage des connaissances et de la compréhension des multiples propriétés et qualités de ces matériaux intensément mises à profit dans des activités diverses, domestiques, artisanales et manifestement aussi d’ordre symbolique, de telle sorte que le gisement châtelperronien était tout de rouge et noir. [less ▲]

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See detailEconomic evaluation of an osteoporosis screening campaign: using FRAX as a prescreening tool
Hiligsmann, Mickaël ULg; Ben Sedrine, Wafa ULg; Bruyère, Olivier ULg et al

in Osteoporosis International (2014), 25(2), 38-39

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See detailDEM time series of an agricultural watershed
Pineux, Nathalie ULg; Lisein, Jonathan ULg; Swerts, Gilles ULg et al

in Geophysical Research Abstracts (2014), 16

the field data come from plot scale studies, the watershed scale seems to be more appropriate to understand them. Currently, small unmanned aircraft systems and images treatments are improving. In this ... [more ▼]

the field data come from plot scale studies, the watershed scale seems to be more appropriate to understand them. Currently, small unmanned aircraft systems and images treatments are improving. In this way, 3D models are built from multiple covering shots. When techniques for large areas would be to expensive for a watershed level study or techniques for small areas would be too time consumer, the unmanned aerial system seems to be a promising solution to quantify the erosion and deposition patterns. The increasing technical improvements in this growth field allow us to obtain a really good quality of data and a very high spatial resolution with a high Z accuracy. In the center of Belgium, we equipped an agricultural watershed of 124 ha. For three years (2011-2013), we have been monitoring weather (including rainfall erosivity using a spectropluviograph), discharge at three different locations, sediment in runoff water, and watershed microtopography through unmanned airborne imagery (Gatewing X100). We also collected all available historical data to try to capture the “long-term” changes in watershed morphology during the last decades: old topography maps, soil historical descriptions, etc. An erosion model (LANDSOIL) is also used to assess the evolution of the relief. Short-term evolution of the surface are now observed through flights done at 200m height. The pictures are taken with a side overlap equal to 80%. To precisely georeference the DEM produced, ground control points are placed on the study site and surveyed using a Leica GPS1200 (accuracy of 1cm for x and y coordinates and 1.5cm for the z coordinate). Flights are done each year in December to have an as bare as possible ground surface. Specific treatments are developed to counteract vegetation effect because it is know as key sources of error in the DEM produced by small unmanned aircraft systems. The poster will present the older and more recent changes of relief in this intensely exploited watershed and notably show how unmanned airborne imagery might be of help in DEM dynamic modelling to support soil conservation research. [less ▲]

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See detailMicropaleontology and chemostratigraphy of the Neoproterozoic Mbuji-Mayi Supergroup, Democratic Republic of Congo.
Kabamba Baludikay, Blaise ULg; Bekker, Andrey; Baudet, Daniel et al

in Geophysical Research Abstracts (2014), 16(EGU2014),

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See detailModeling the hot subdwarf PB 8783 by asteroseismology
Van Grootel, Valérie ULg; Charpinet, Stephane; Fontaine, Gilles et al

in Astronomical Society of the Pacific Conference Series (2014), 481

We present the preliminary seismic modeling of one of the hottest and most compact subdwarf pulsators, PB 8783 (EO Ceti). This is a well observed hot subdwarf star, including a 78 d campaign in white ... [more ▼]

We present the preliminary seismic modeling of one of the hottest and most compact subdwarf pulsators, PB 8783 (EO Ceti). This is a well observed hot subdwarf star, including a 78 d campaign in white light photometry that we carried out at Mount Bigelow, Arizona, during the fall 2007. PB 8783 has also been observed at length in spectroscopy, revealing a spectrum highly contaminated by a main sequence companion. It is extremely difficult to disentangle the contribution of the two components and, as a consequence of this, the exact nature of the hot subdwarf (sdB or sdO star) is undetermined. We propose here to test the two hypotheses by asteroseismology. Although the sdB possibility cannot be excluded, the pulsation modes observed in PB 8783 are much better accommodated in the case of an sdO star. [less ▲]

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See detailEight years of denosumab treatment in postmenopausal women with osteoporosis: results from the first five years of the freedom extension
Papapoulos, S; Lippuner, K; Roux, C et al

in Osteoporosis International (2014), 25(2), 46-47

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See detailPrevalence of sarcopenia according to different diagnostic tools
Beaudart, Charlotte ULg; Buckinx, Fanny ULg; Slomian, Justine ULg et al

in Journal of Frailty & Aging (2014), 3(1), 43

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See detailBiochemical composition of cartilage with naturally occurring defects in the ovine femora-tibial joint
Matagne, A; Clegg, P; Tew, S et al

in Osteoporosis International (2014), 25(S2), 173

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See detailEvaluation de la prévalence de la sarcopénie selon différents outils de diagnostic
Beaudart, Charlotte ULg; SLANGEN, Catherine ULg; Buckinx, Fanny ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 42

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See detailOdanacatib anti-fracture efficacy and safety in postmenopausal women with osteoporosis: results from the phase III long-term odanacatib fracture trial
McClung, MR; Langdahl, B; Papapoulos, S et al

in Osteoporosis International (2014), 25(5), 573-575

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See detailOn Interpreting g-Mode Period Spacings in sdB Stars
Charpinet, Stéphane; Brassard, Pierre; Van Grootel, Valérie ULg et al

in Astronomical Society of the Pacific Conference Series (2014), 481

Long period B subdwarf (sdB) pulsators, when observed from space with the satellites CoRoT and Kepler, show particularly rich g-mode oscillation spectra with often hundreds of frequencies. In many of ... [more ▼]

Long period B subdwarf (sdB) pulsators, when observed from space with the satellites CoRoT and Kepler, show particularly rich g-mode oscillation spectra with often hundreds of frequencies. In many of these pulsation spectra, regularities in the observed period distributions typical of high order g-modes in chemically homogeneous stars have been reported. This led to a claim that sdB stars could be much less chemically stratified than previously thought. In this paper, we show that such an interpretation is unfounded. We reinvestigate trapping effects on g-modes in sdB stars in view of current observations and show that ”standard” stratified models can also produce nearly quasi-constant period spacings in the low frequency range which are comparable to those observed in the g-mode spectra of these stars. [less ▲]

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See detailImpact of components of the metabolic syndrome on progression of knee osteoarthritis in the Sekoia study
Parsons, C; Edwards, MH; Eymard, F et al

in Osteoporosis International (2014), 25(2), 230

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See detailEncapsulation of nanoparticles for catalysis applications : Ni-Cu/SiO2 cogelled xerogel catalysts for selective hydrodechlorination of 1,2-dichloroethane into ethylene
Lambert, Stéphanie ULg

in Proceedings du “17th Microencapsulation Industrial Convention”, Bruxelles, Belgique, 25 avril 2014 (2014)

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See detailPrévalence de la sarcopénie : impact de l'utilisation de différentes valeurs seuils de diagnostic
Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg; Slomian, Justine ULg et al

in Cahiers de l'Année Gérontologique (Les) (2014), 2(23), 513-75

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See detailReaching the 1% accuracy level on stellar mass and radius determinations from asteroseismology
Van Grootel, Valérie ULg; Charpinet, Stephane; Fontaine, Gilles et al

in Proceedings of the International Astronomical Union (2014), 301

Asteroseismic modeling of subdwarf B (sdB) stars provides measurements of their fundamental parameters with a very good precision; in particular, the masses and radii deter- mined from asteroseismology ... [more ▼]

Asteroseismic modeling of subdwarf B (sdB) stars provides measurements of their fundamental parameters with a very good precision; in particular, the masses and radii deter- mined from asteroseismology are found to typically reach a precision of 1% containing various uncertainties associated with their inner structure and the underlying microphysics (composition and transition zones profiles, nuclear reaction rates, etc.). Therefore, the question of the accuracy of the stellar parameters derived by asteroseismology is legitimate. We present here the seismic modeling of the pulsating sdB star in the eclipsing binary PG 1336-018, for which the mass and the radius are independently and precisely known from the modeling of the reflection/irradiation effect and the eclipses observed in the light curve. This allows us to quantitatively evaluate the reliability of the seismic method and test the impact of uncertainties in our stellar models on the derived parameters. We conclude that the sdB star parameters inferred from asteroseismology are precise, accurate, and robust against model uncertainties. [less ▲]

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See detailEfficient combination of pairwise feature networks
Bellot, Pau; Meyer, Patrick ULg

in JMLR: Workshop and Conference Proceedings (2014)

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See detailLes facteurs qui favorisent l’implication des médecins généralistes belges dans la gestion des abus de substances. Une étude qualitative basée sur le I-Change Model
Ketterer, Frédéric ULg; Symons, Linda; Lambrechts, Marie-Claire et al

in Revue Médicale de Bruxelles (2014), 35(3),

Objectifs Les médecins généralistes (MG) jouent un rôle majeur dans la détection et la gestion des abus de substances. L’étude présentée ici investiguait les facteurs qui influencent leur implication ... [more ▼]

Objectifs Les médecins généralistes (MG) jouent un rôle majeur dans la détection et la gestion des abus de substances. L’étude présentée ici investiguait les facteurs qui influencent leur implication concernant la gestion des abus d’alcool, des drogues illégales, des hypnotiques et des anxiolytiques dans la population belge des 18-65 ans. Méthodes 20 MG ont été interrogés par entretiens semi-directifs dans les régions de Liège et d’Anvers. Le I-Change Model de de Vries a été utilisé pour construire le guide d’entretien et analyser les données récoltées. Résultats Parmi les principaux résultats de l’étude, il ressortait que les MG étaient fortement influencés dans leur approche par leurs propres représentations de l’abus, qui oscillait leurs responsabilités professionnelles envers ces patients et la responsabilité de ces derniers quant à la gestion de leur santé, avec l’idée de faute morale en substrat. En ce sens, l’abus de substance était perçu sur un continuum entre l’abus comme forme de maladie chronique d’une part, et la faute morale d’autre part. L’alcool et le cannabis étaient néanmoins mieux acceptés socialement que les autres substances. Les propres expériences personnelles des MG concernant les abus avaient aussi une incidence sur leur volonté de s’investir avec ces patients. Pour autant, les pratiques multidisciplinaires (notamment au forfait) et l’expérience étaient évoqués comme des facteurs importants quant à l’engagement dans la gestion. Les contraintes temporelles et l’investissement demandé étaient, en revanche, considérés comme des barrières. Conclusion Les facteurs motivationnels apparaissaient centraux dans la décision de s’investir dans la gestion des abus de substances, bien davantage que les connaissances théoriques et les formations qui semblaient plus secondaires. La peur du burn-out s’exprimait donc en substrat. La formation des MG devrait tenir compte de ce souhait de se protéger, afin de favoriser simultanément une approche centrée sur le patient. [less ▲]

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See detailValidation des paramètres de marche par un système accélérométrique (Locométrix) à l’aide d’un système opto-électronique 3D (Coda Motion)
GILLAIN, Sophie ULg; Schwartz, C; Dramé, M et al

in Cahiers de l'Année Gérontologique (Les) (2014), 2(23), 724-73

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See detailEvolution over two years of functional and motor abilities among nursing home residents
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Journal of Frailty & Aging (2014), 3(1), 45

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See detailAssociation entre la masse musculaire totale et la densité minérale osseuse de la hanche
Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg; Slomian, Justine ULg et al

in Cahiers de l'Année Gérontologique (Les) (2014), 2(23), 513-74

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See detailEvolution sur deux ans des capacités fonctionnelles et motrices de sujets âgés résidant en maison de repos
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 57-58

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See detailHemolytic crisis induced by rasburicase administration revealing G-6-PD deficiency.
SID, Sélim ULg; Dugauquier, D.; DE PRIJCK, Bernard ULg et al

in Belgian Journal of Hematology (2014)

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See detailMiddle Miocene climate and vegetation model reconstructions and their validation with the NECLIME database
François, Louis ULg; Henrot, Alexandra-Jane ULg; Utescher, Torsten et al

in Geophys. Res. Abstracts (2014), 16

The NECLIME database gathers data of the fossil flora recorded at many localities around the world at different times of the Miocene. François et al. (Palaeogeography, Palaeoclimatology, Palaeoecology ... [more ▼]

The NECLIME database gathers data of the fossil flora recorded at many localities around the world at different times of the Miocene. François et al. (Palaeogeography, Palaeoclimatology, Palaeoecology, 304, 359–378, 2011) have presented a new method for evaluating palaeoclimate model simulations from such fossil floras. In this method, palaeovegetation is simulated from climate model outputs, using a dynamic vegetation model. Model vegetation reconstruction is then compared to the vegetation cover indicated by the fossil flora record at the various localities, using a common classification of plant functional types (PFTs) in the data and the model. Here, we apply this method to test several published Middle Miocene climate simulations conducted with General Circulation Models of different complexity: (a) Planet Simulator, (b) FOAM-LMDZ4, (c) MPI-ESM, (d) CCSM3.0 and (4) CESM1.0. Corresponding palaeovegetation distributions are simulated with the CARAIB dynamic vegetation model, in which an upgraded vegetation classification involving 26 PFTs has been imple- mented. The NECLIME palaeoflora data from 154 localities distributed worldwide have been translated in terms of the presence/absence of these PFTs. A comparison of models and data is then undertaken globally and in selected regions of the world, using all available localities. The level of agreement varies among models, among PFTs and among regions. For instance, some models are able to produce tropical and subtropical PFTs in Europe consistently with the data, but the agreement for these PFTs may be much poorer in other parts of the world, such as in northeastern Eurasia. [less ▲]

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See detailAnalyse non destructive des pigments préhistoriques : du laboratoire à la grotte
Beck, Lucile; Lebon, Matthieu; Lahlil, Sophia et al

in Paléo (2014), special issue

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See detailAlgorithm for the symptomatic and structural treatment of osteoarthritis
Reginster, Jean-Yves ULg

in Osteoporosis International (2014), 25(5), 564

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See detailSafety and tolerability of odanacatib therapy in postmenopausal women with osteoporosis: results from the phase III long-term odanacatib fracture trial
Papapoulos, S; McClung, MR; Langdahl, B et al

in Osteoporosis International (2014), 25(5), 604-605

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See detailAcceleration of Affine Hybrid Transformations
Boigelot, Bernard ULg; Herbreteau, Frédéric; Mainz, Isabelle ULg

in Lecture Notes in Computer Science (2014), 8837

This work addresses the computation of the set of reachable configurations of linear hybrid automata. The approach relies on symbolic state-space exploration, using acceleration in order to speed up the ... [more ▼]

This work addresses the computation of the set of reachable configurations of linear hybrid automata. The approach relies on symbolic state-space exploration, using acceleration in order to speed up the computation and to make it terminate for a broad class of systems. Our contribution is an original method for accelerating the control cycles of linear hybrid automata, i.e., to compute their unbounded repeated effect. The idea consists in analyzing the data transformations that label these cycles, by reasoning about the geometrical features of the corresponding system of linear constraints. This approach is complete over Multiple Counters Systems (MCS), and is able to accelerate hybrid transformations that are out of scope of existing techniques. [less ▲]

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See detailNitrogen fertilisation recommendations : could they be improved using stochastically generated climates in conjunction with crop models ?
Dumont, Benjamin ULg; Basso, Bruno; Meza Morales, Walter ULg et al

in Proceedings of the 12th ICPA (2014)

Accurate determination of optimal Nitrogen (N) recommendations which ensure maximization of farmer's revenue while minimizing the environmental constraint is maybe among the major challenges in ... [more ▼]

Accurate determination of optimal Nitrogen (N) recommendations which ensure maximization of farmer's revenue while minimizing the environmental constraint is maybe among the major challenges in agriculture. Crop models have the potential to deal with such aspects and could thus be used to develop decision support systems. However unknown future weather conditions remains the key point of accurate yield forecast. This paper presents the results of a preliminary study that aims to supply the unknown future with stochastically generated climatic conditions. Coupling the methodology with appropriate decision rules led to a generic decision support system able to guide the N management practices. [less ▲]

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See detailImpact of components of the metabolic syndrome on progression of knee osteoarthritis in the SEKOIA study
Edwards, MH; Parsons, C; Eymard, F et al

in Rheumatology (2014), 53(1), 31

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See detailEffects of a commercial formulation of a plant resistance elicitor on non-target organisms
Jansen, Jean-Pierre; Buenotesta, Raphaël; Schiffers, Bruno ULg

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2014), 103

The toxicity of Fyto11, a plant resistance elicitor commercial formulation used to increase the natural resistance of Cucurbitaceae (cucumber, zucchini and melon) and Solanaceae (tomato and sweet pepper ... [more ▼]

The toxicity of Fyto11, a plant resistance elicitor commercial formulation used to increase the natural resistance of Cucurbitaceae (cucumber, zucchini and melon) and Solanaceae (tomato and sweet pepper) against powdery mildew under greenhouse conditions, has been assessed on several beneficial arthropods: the honeybee Apis mellifera, the predatory miteTyphlodromus pyri, the aphid parasitic wasp Aphidius rhopalosiphi and the aphid predator Episyrphus balteatus. Tested at 0.5% and 1.0% spray dilution on plants, Fyto11 did not lead to significant corrected mortalities for E. balteatus larvae and adult wasps of A. rhopalosiphi, with a maximum of 5.4% mortality. No effects on reproduction capacity of the parasitic wasps were observed. The exposure of T. pyri protonymphs to Fyto11 on glass plates lead to corrected mortalities of 1.1% and 32.6% at 0.5% and 1.0% and to a reduction of female fertility of 9.0% and 25.4%, compared to the control performance. When assessed on the honeybee by contact and oral exposure, Fyto11 did not lead to significant effects, with LD50 estimated as > 10 μg a.i./bee (oral) and 12.5 μg a.i./bee (contact), leading to HQ ratio < 50 and classifying the product at no or low risk for honeybees. These results showed that the product was harmless for all beneficials at the proposed commercial rate, except for T. pyri at 1.0% on glass plates, where the product was rated as slightly harmful. Even if all the beneficial species’ diversity has not been assessed with this product, negative effects on non-target organisms are not expected in field conditions and Fyto11 can be considered as compatible with IPM programs. [less ▲]

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See detailToward redesigning the relationship between farming systems and biodiversity conservation
Brédart, David ULg; Denayer, Dorothée ULg; Mormont, Marc ULg

in Proceedings of the 11th European IFSA Symposium. Farming systems facing global challenges: capacities and strategies. (2014)

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See detailWhat does multiplication of tidemarks mean in the ovine femora-tibial joint ?
Pirson, R; Matagne, A; Nisolle, JF et al

in Osteoporosis International (2014), 25(S2), 172

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See detailFacteurs de risque de chute chez des sujets résidant en maison de repos : étude prospective d'une durée de 2 ans
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 164-165

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See detailEstablishment of a murine graft-versus-myeloma model using allogeneic stem cell transplantation.
Binsfeld, Marilène ULg; BEGUIN, Yves ULg; Belle, Ludovic et al

in Belgian Journal of Hematology (2014)

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See detailThe neural bases of proactive and reactive control processes in normal aging
Manard, Marine ULg; François, Sarah ULg; Salmon, Eric ULg et al

in Frontiers in Human Neuroscience (2014)

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See detailFacteurs pronostiques de décès chez des sujets résidant en maison de repos suivis d'une manière prospective pendant une période de 2 ans
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 73-74

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See detailWhich measurement strategies to improve spatial erosion and deposition patterns modelling?
Pineux, Nathalie ULg; Maugnard, Alexandre; Swerts, Gilles ULg et al

in Geophysical Research Abstracts (2014), 16

Validation of the erosion models requires field data. To date, many authors continue to highlight the paucity of accurate field observations and long-term enough studies. The fields observations are often ... [more ▼]

Validation of the erosion models requires field data. To date, many authors continue to highlight the paucity of accurate field observations and long-term enough studies. The fields observations are often put aside because these measures are difficult to obtain: weighty experimental devices, climatic dependence, . . . Hence the models are evolving and propose refined calculation procedures including for instance the calculation of landscape evolution. The need of field data therefore increases and new measuring strategies should arise. In the centre of Belgium we choose an agricultural watershed quite representative of the local context. It covers 124 ha of loamy soil with more than 90% of arable land and a weak proportion of forest and artificial lands. The slope ranges between 0 and 9%. Instrumentation on the watershed includes meteorological observations and discharge measurement coupled with water sampling at different outlets. The weather data (radiation, temperature, wind velocity, relative humidity and rainfall) and discharge measurement (comparison between Doppler and pressure sensors) will allow us to model the hydrological behaviour of the catchment. Rainfall readings (tipping buckets) are completed with erosivity readings (disdrometer). Erosivity, together with soil data, land use and agricultural practices observations on field, will be used as entry in the Landsoil model. The sediment samplings at 3 points in the catchment will give an insight of the sediment delivery of 3 subcatchments. The Landsoil model calculates the evolution of the DTM through time. This cannot be compared to measurements at the outlet and requires further data collection. Older elevation data and/or archaeological data are a possible source of information even if their precision remains scarce in our context. 1950’s soil surveys are on the contrary really informative since they detail the horizons depth in a spatial way and can be compared to new observation across the watershed. Coupled with unmanned aerial system, they should allow us to test the model performances and improve our knowledge of the spatial patterns of erosion and deposition. [less ▲]

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See detailA volatile sex pheromone in the invasive ladybeetle Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)
Fassotte, Bérénice ULg; Fischer, Christophe ULg; Durieux, Delphine ULg et al

in Communications in Agricultural and Applied Biological Sciences (2014), 79(1), 79-81

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See detailImpact of components of the metabolic syndrome on knee osteoarthritis progression in the SEKOIA study
Eymard, F; Edwards, M; Parsons, C et al

in Osteoarthritis and Cartilage (2014), 22(1), 376

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See detailPrevalence of vitamin D inadequacy in european women aged over 80 years
Bruyère, Olivier ULg; Slomian, Justine ULg; Beaudart, Charlotte ULg et al

in Osteoporosis International (2014), 25(2), 196

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See detailRecent increases in Stratospheric HCl: Stratospheric Dynamics versus the Montreal Protocol
Chipperfield, M.P.; Mahieu, Emmanuel ULg; Notholt, J. et al

in Geophysical Research Abstracts (2014), 16

Long-lived chlorine-containing source gases, such as chlorofluorocarbons (CFCs), are transported into the stratosphere where they decompose and cause ozone depletion. Increases in chlorine during the ... [more ▼]

Long-lived chlorine-containing source gases, such as chlorofluorocarbons (CFCs), are transported into the stratosphere where they decompose and cause ozone depletion. Increases in chlorine during the 1970s-1990s resulted in long-term ozone decreases, especially in the polar regions. Following the implementation of the Montreal Protocol, the near-surface chlorine loading was observed to peak in 1993 and, since then, to decrease in line with expectations. After release from source gases in the stratosphere, chlorine mainly forms the reservoir HCl, providing an alternative method for monitoring the progress of the Montreal Protocol. A maximum in stratospheric HCl was observed around 1996, followed by decay at a rate close to 1%/year, consistent with the tropospheric chlorine peak and known transport timescales. However, we will present total column observations from ground-based FTIR instruments which show an unexpected and significant upturn in stratospheric HCl around 2007 in the northern hemisphere. Height-resolved observations from satellite instruments (HALOE, MLS, ACE) confirm this increase and show that it occurs in the lower stratosphere. These observations contrast with the ongoing monotonic decrease of near-surface chlorine source gases. Using 3-D model simulations (TOMCAT/SLIMCAT and KASIMA) we attribute this trend anomaly to a slowdown in the NH atmospheric circulation, causing air in the lower stratosphere to become more aged with a larger relative conversion of source gases to HCl. An important conclusion is that the Montreal Protocol is still on track and will still lead to long-term decreases in stratospheric chlorine. This dynamical variability could also significantly affect the evolution of stratospheric ozone and must be accounted for when searching for signs of ozone recovery. [less ▲]

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See detailFunctional connectivity and recognition of familiar faces in Alzheimer’s disease
Kurth, Sophie ULg; Bahri, Mohamed Ali ULg; Moyse, Evelyne ULg et al

in Frontiers in Human Neuroscience (2014)

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See detailFurther reduction in nonvertebral fracture rate is observed following 3 years of denosumab treatment: results with up to 7 years in the freedom extension
Ferrari, S; Adachi, JD; Lippuner, K et al

in Osteoporosis International (2014), 25(2), 56

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See detailMicrostructures and Mechanical Properties of Stainless Steel AISI 316L Processed by Selective Laser Melting
Mertens, Anne ULg; Reginster, Sylvie ULg; Contrepois, Quentin et al

in Materials Science Forum (2014), 783-786 (2014)

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The ... [more ▼]

In this study, samples of stainless steel AISI 316L have been processed by selective laser melting, a layer-by-layer near-net-shape process allowing for an economic production of complex parts. The resulting microstructures have been characterised in details in order to reach a better understanding of the solidification and consolidation processes. The influence of the processing parameters on the mechanical properties was investigated by means of uniaxial tensile testing performed on samples produced with different main orientations with respect to the building direction. A strong anisotropy of the mechanical behaviour was thus interpreted in relation with the microstructures and the processing conditions. [less ▲]

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See detailObservational Asteroseismology of Hot Subdwarf Stars with the Mont4K/Kuiper Combination at the Steward Observatory Mount Bigelow Station
Fontaine, Gilles; Green, Elizabeth M.; Charpinet, Stéphane et al

in Astronomical Society of the Pacific Conference Series (2014), 481

In the last few years, we have carried out several extensive observational campaigns on pulsating hot subdwarf stars using the Mont4K CCD camera attached to the 1.55 m Kuiper Telescope on Mount Bigelow ... [more ▼]

In the last few years, we have carried out several extensive observational campaigns on pulsating hot subdwarf stars using the Mont4K CCD camera attached to the 1.55 m Kuiper Telescope on Mount Bigelow. The Mont4K is a joint partnership between the University of Arizona and Universite ́ de Montre ́al. It was designed and built at Steward Observatory. Using the Mont4K/Kuiper combination, we have so far, and among others, gathered high-sensitivity broadband light curves for PG 1219+534, PB8783, HS 0702+6043, and Feige 48. We report very briefly on some of the most interesting observational results that came out of these campaigns. [less ▲]

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See detailGalectin expression in the multiple myeloma microenvironment
Muller, Joséphine ULg; CAERS, Jo ULg; Binsfeld, Marilène ULg et al

in Belgian Journal of Hematology (2014)

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See detailStrontium ranelate decreases the number of rapid radiological progressors from the first year in SEKOIA study
Chevalier, X; Richette, P; Bruyère, Olivier ULg et al

in Osteoarthritis and Cartilage (2014), 22(1), 461

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See detailCould internet use be promising in health prevention and promotion in menopausal women ? A preliminary report
Slomian, Justine ULg; Streel, Sylvie ULg; Appleboom, G et al

in Osteoporosis International (2014), 25(2), 309

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See detailChallenges for the development of bone forming agents in Europe: introduction
Kanis, JA; Rizzoli, R; Cooper, C et al

in Osteoporosis International (2014), 25(2), 66-67

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See detailVitamine D et sujet âgé
Bruyère, Olivier ULg; Reginster, Jean-Yves ULg

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2014), 12(1), 5-6

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See detailMode Identification in Subdwarf B Stars from Multi-Wavelength Observations
Randall, Suzanna K; Fontaine, Gilles; Brassard, Pierre et al

in Astronomical Society of the Pacific Conference Series (2014), 481

We present several examples of partial mode identification for rapidly pulsating subdwarf B stars on the basis of multi-colour observations. Three targets (V391 Per, Balloon 090100001, and EC 11583−2708 ... [more ▼]

We present several examples of partial mode identification for rapidly pulsating subdwarf B stars on the basis of multi-colour observations. Three targets (V391 Per, Balloon 090100001, and EC 11583−2708) were analysed from multi-colour photometry, while studies were conducted from time-series spectrophotometry for two further stars (EC 20338−1925 and EC 01541−1409). In all cases, periodicities strongly dominating the frequency spectrum are associated with radial modes, indicating a clear hierarchy according to visibility when integrating over the visible disk of the star. [less ▲]

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See detailEvolution over two years of functional and motor abilities among nursing home residents
Buckinx, Fanny ULg; Beaudart, Charlotte ULg; Slomian, Justine ULg et al

in Osteoporosis International (2014), 25(2), 121

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See detailPrecision and Accuracy of Asteroseismology Applied to sdB stars Using the Forward Modeling Method
Charpinet, Stéphane; Van Grootel, Valérie ULg; Brassard, Pierre et al

in Astronomical Society of the Pacific Conference Series (2014), 481

Detailed seismic studies of hot B subdwarf (sdB) stars using the forward modeling approach provide measurements of their fundamental parameters at very interesting precisions. For instance, masses, radii ... [more ▼]

Detailed seismic studies of hot B subdwarf (sdB) stars using the forward modeling approach provide measurements of their fundamental parameters at very interesting precisions. For instance, masses, radii, and log g values derived this way are typically claimed at ∼ 1 − 2%, ∼ 0.5%, and ∼ 0.1 % precision, respectively. However, this method relies on still imperfect stellar models that contains various uncertainties associated with their inner structure and the underlying microphysics. A signature of these imperfections is the inability of current best-fit seismic models to reproduce all the observed oscillation frequencies at the precision of the observations. Therefore, the question of the accuracy (as opposed to the precision) of the derived parameters obtained from this approach is legitimate. Here, we revisit the question of precision and accuracy based on new, third generation, complete static models of sdB stars developed for asteroseismology and applied to the case of the eclipsing system PG 1336-018. This allows us to evaluate the reliability of the method and quantify the impact of various uncertainties in the stellar models on the derived stellar parameters. Finally, we discuss the intrinsic potential of asteroseismology for precise measurements of stellar parameters and show that we are far from having fully exploited this technique in terms of precision that can, in principle, be achieved. [less ▲]

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See detailYearly Follow-up of Methane Turbulent Exchange Over an Intensively Grazed Pasture in Belgium
Dumortier, Pierre ULg; Aubinet, Marc ULg; Beckers, Yves ULg et al

in Communications in Agricultural and Applied Biological Sciences (2014), 79(1), 91-96

Detailed reference viewed: 40 (12 ULg)