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See detailENMG et expertise
WANG, François-Charles ULg

Conference (2012, December 04)

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See detailIntroduction aux théories de la perception du paysage
Vranken, Isabelle ULg

Speech/Talk (2012)

La perception du paysage est abordée sous l'angle de l'école behavioriste, plus particulièrement les travaux de Kevin Lynch en urbanisme sur l'image de la ville. Elle part du postulat que la perception de ... [more ▼]

La perception du paysage est abordée sous l'angle de l'école behavioriste, plus particulièrement les travaux de Kevin Lynch en urbanisme sur l'image de la ville. Elle part du postulat que la perception de l'environnement influence le comportement de l'individu qui y vit (le citoyen)et modifie à son tour son environnement. Ceci sert à dégager des principes d'aménagement du territoire pour plus de bien-être. La voirie joue un rôle central dans la perception de la ville, étant donné que c'est le point d'observation principal de celle-ci par les citoyens. Selon sa forme, ses accès et ses abords, ou encore l'organisation de l'écran construit, différents effets d'ambiance urbaine peuvent être ménagés. Dans ce paysage s'implantent les éléments principaux de la structure de la ville: limites, voies, noeuds, points de repère, quartiers. Leur organisation relative fait émerger les caractéristiques globales de la ville que sont la lisibilité et l'imagibilité. Ces techniques ont été utilisées et adaptées pour l'analyse de la ville de Lubumbashi et de l'Avenue Louise à Bruxelles. [less ▲]

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See detailRelationship between milk composition estimated from mid infrared and methane emissions in dairy cows
Kandel, Purna Bhadra ULg; Vanlierde, Amélie ULg; Dehareng, F et al

Scientific conference (2012, December 03)

N/A

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

Conference (2012, December 03)

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

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

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

Conference (2012, December 03)

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See detailLa réforme du master bioingénieur en Sciences et Technologies de l’Environnement par le biais des compétences
Debouche, Charles ULg

Scientific conference (2012, December 03)

Presentation of the method adopted to elaborate the referential of competences of the Master bioingénieur in Sciences and Technologies of the Environment and to reform the program of study of it

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See detailChangement climatique 2012
Ozer, Pierre ULg

Scientific conference (2012, December 03)

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See detailTransiting exoplanets from the CoRoT space mission XXI. CoRoT-19b: A low density planet orbiting an old inactive F9V-star
Guenther, E. W.; Diaz, R. F.; Gazzano, J-C et al

in Astronomy and Astrophysics (2012), 537

Observations of transiting extrasolar planets are of key importance to our understanding of planets because their mass, radius, and mass density can be determined. The CoRoT space mission allows us to ... [more ▼]

Observations of transiting extrasolar planets are of key importance to our understanding of planets because their mass, radius, and mass density can be determined. The CoRoT space mission allows us to achieve a very high photometric accuracy. By combining CoRoT data with high-precision radial velocity measurements, we derive precise planetary radii and masses. We report the discovery of CoRoT-19b, a gas-giant planet transiting an old, inactive F9V-type star with a period of four days. After excluding alternative physical configurations mimicking a planetary transit signal, we determine the radius and mass of the planet by combining CoRoT photometry with high-resolution spectroscopy obtained with the echelle spectrographs SOPHIE, HARPS, FIES, and SANDIFORD. To improve the precision of its ephemeris and the epoch, we observed additional transits with the TRAPPIST and Euler telescopes. Using HARPS spectra obtained during the transit, we then determine the projected angle between the spin of the star and the orbit of the planet. We find that the host star of CoRoT-19b is an inactive F9V-type star close to the end of its main-sequence life. The host star has a mass M*=1.21+/-0.05 Msun and radius R*=1.65+/-0.04 Rsun. The planet has a mass of Mp=1.11+/-0.06 Mjup and radius of Rp=1.29+/-0.03 Rjup. The resulting bulk density is only rho=0.71+/-0.06 gcm-3, which is much lower than that for Jupiter. The exoplanet CoRoT-19b is an example of a giant planet of almost the same mass as Jupiter but a 30% larger radius. [less ▲]

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See detailSpring air temperature accounts for the bimodal temporal distribution of Septoria tritici epidemics in the winter wheat stands of Luxembourg
Beyer, Marco; El Jarroudi, Moussa ULg; Junk, Jürgen et al

in Crop Protection (2012), 42

Septoria tritici is the causal agent of leaf blotch in wheat and among the most damaging fungal cereal pathogens in the humid regions of central Europe. The percentage of the leaf area colonized by S ... [more ▼]

Septoria tritici is the causal agent of leaf blotch in wheat and among the most damaging fungal cereal pathogens in the humid regions of central Europe. The percentage of the leaf area colonized by S. tritici was recorded weekly between April and July every season between 2004 and 2010. A total of 11 cultivars with moderate susceptibility [ratings of 4e6 on a 1 (resistant) to 9 (susceptible) scale] were included. The disease level was assessed on the upper three leaf layers at 2 locations between 2004 and 2006 and at 3 locations between 2007 and 2010. The period between sowing and the point of time, when 50% of the leaf area was necrotized due to colonization by S. tritici (T50) was estimated for each year, site, cultivar and leaf layer by non-linear regression. T50 values followed a bimodal distribution with one maximum at 245 days after sowing (DAS; early epidemics) and one maximum at 270 DAS (late epidemics). Early epidemics were preceded by almost constant daily average temperatures of 13.2 0.8 C between 181 and 210 DAS. Late epidemics were preceded by an approximately linear increase in temperature from 8.7 0.9 to 12.1 0.9 C during the same period of time. Based on these differences, it seems possible to predict whether an early or a late epidemic can be expected at least 35 days before the epidemic outbreak. Temperature sums calculated with a base temperature of 6.6 C starting at sowing and ending when T50 was reached were not significantly different between early and late epidemics (P ¼ 0.73) and averaged 1721 49 days. Fungicide applications, which resulted into a delay of the epidemic development similar to the difference between early and late epidemics, resulted in a yield increase between 11.7 and 12.6%.Septoria tritici is the causal agent of leaf blotch in wheat and among the most damaging fungal cereal pathogens in the humid regions of central Europe. The percentage of the leaf area colonized by S. tritici was recorded weekly between April and July every season between 2004 and 2010. A total of 11 cultivars with moderate susceptibility [ratings of 4e6 on a 1 (resistant) to 9 (susceptible) scale] were included. The disease level was assessed on the upper three leaf layers at 2 locations between 2004 and 2006 and at 3 locations between 2007 and 2010. The period between sowing and the point of time, when 50% of the leaf area was necrotized due to colonization by S. tritici (T50) was estimated for each year, site, cultivar and leaf layer by non-linear regression. T50 values followed a bimodal distribution with one maximum at 245 days after sowing (DAS; early epidemics) and one maximum at 270 DAS (late epidemics). Early epidemics were preceded by almost constant daily average temperatures of 13.2 0.8 C between 181 and 210 DAS. Late epidemics were preceded by an approximately linear increase in temperature from 8.7 0.9 to 12.1 0.9 C during the same period of time. Based on these differences, it seems possible to predict whether an early or a late epidemic can be expected at least 35 days before the epidemic outbreak. Temperature sums calculated with a base temperature of 6.6 C starting at sowing and ending when T50 was reached were not significantly different between early and late epidemics (P ¼ 0.73) and averaged 1721 49 days. Fungicide applications, which resulted into a delay of the epidemic development similar to the difference between early and late epidemics, resulted in a yield increase between 11.7 and 12.6%. [less ▲]

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See detailL'Empowerment au coeur des bouleversements induits par les TIC dans la gestion des ressources humaines
Blavier, André ULg

in RH Publica (2012), (4), 12-15

Observer l’influence des TIC (Technologies de l’Information et de la Communication” sur les ressources humaines à la lumière du seul débat “pour ou contre les réseaux sociaux dans l’entreprise ou ... [more ▼]

Observer l’influence des TIC (Technologies de l’Information et de la Communication” sur les ressources humaines à la lumière du seul débat “pour ou contre les réseaux sociaux dans l’entreprise ou l’organisation ?” est une approche bien trop restrictive. Les défis relatifs à l’évolution des ressources humaines s’inscrivent dans une perspective plus large, celle d’un environnement numérique global. Comme l’a souligné le rapport “Digital Economy Rankings 2010” d’IBM en collaboration avec l’Economist Intelligence Unit (The Economist): “Simply put, there are no alternatives but to become more digital with whatever assets are available”. Parmi ces “assets”, et contrairement à ce qu’un niveau d’automatisation toujours plus important pourrait laisser penser, les ressources humaines vont occuper une place absolument déterminante pour la compétitivité des territoires. [less ▲]

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See detailSome misunderstood or unknown LaTeX tricks (VI)
Merciadri, Luca ULg

E-print/Working paper (2012)

Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the ... [more ▼]

Customizing a document class is important in the LaTeX world. We will consider two examples of this using the lettre document class. Next, we will consider a small fraction of a bigger LaTeX problem: the details of character encoding. [less ▲]

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See detailMicrolensing Binaries with Candidate Brown Dwarf Companions
Shin, I.-G.; Han, C.; Gould, A. et al

in Astrophysical Journal (2012), 760

Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the ... [more ▼]

Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q < 0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 ± 0.01 M [SUB]&sun;[/SUB] and 0.019 ± 0.002 M [SUB]&sun;[/SUB] for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches. [less ▲]

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See detailSignatures of rotation in oscillation spectra
Reese, Daniel ULg; Prat, V.; Barban, C. et al

in Boissier, S.; de Laverny, P.; Nardetto, N. (Eds.) et al SF2A-2012: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics (2012, December 01)

Rotation makes oscillation spectra of rapidly rotating stars much more complicated. Hence, new strategies need to be developed in order to interpret such spectra. In what follows, we describe how multi ... [more ▼]

Rotation makes oscillation spectra of rapidly rotating stars much more complicated. Hence, new strategies need to be developed in order to interpret such spectra. In what follows, we describe how multi-colour photometric mode visibilities can be generalised to rapidly rotating stars, while fully taking into account centrifugal deformation and gravity darkening. We then go on to describe some first results as well as a strategy for constraining mode identification. [less ▲]

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See detailComment installer et utiliser Endnote Web pour réaliser une bibliographie automatique dans MS Word
Denis, Antoine ULg

Learning material (2012)

Ce petit document vous apprendra en 20 minutes à installer et utiliser le logiciel libre « Endnote Web » qui permet de : a) Créer une base de données bibliographique personnelle et en ligne; b) Insérer et ... [more ▼]

Ce petit document vous apprendra en 20 minutes à installer et utiliser le logiciel libre « Endnote Web » qui permet de : a) Créer une base de données bibliographique personnelle et en ligne; b) Insérer et formater automatiquement une bibliographie dans un document Microsoft Word (Office) [less ▲]

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See detailCassini UVIS observations of Titan nightglow spectra
Ajello, Joseph M.; West, Robert A.; Gustin, Jacques ULg et al

in Journal of Geophysical Research. Space Physics (2012), 117

In this paper we present the first nightside EUV and FUV airglow limb spectra of Titan showing molecular emissions. The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed photon emissions of Titan's ... [more ▼]

In this paper we present the first nightside EUV and FUV airglow limb spectra of Titan showing molecular emissions. The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed photon emissions of Titan's day and night limb-airglow and disk-airglow on multiple occasions, including during an eclipse observation. The 71 airglow observations analyzed in this paper show EUV (600-1150 Å) and FUV (1150-1900 Å) atomic multiplet lines and band emissions arising from either photoelectron induced fluorescence and solar photo-fragmentation of molecular nitrogen (N[SUB]2[/SUB]) or excitation by magnetosphere plasma. The altitude of the peak UV emissions on the limb during daylight occurred inside the thermosphere at the altitude of the topside ionosphere (near 1000 km altitude). However, at night on the limb, a subset of emission features, much weaker in intensity, arise in the atmosphere with two different geometries. First, there is a twilight photoelectron-excited glow that persists with solar depression angle up to 25-30 degrees past the terminator, until the solar XUV shadow height passes the altitude of the topside ionosphere (1000-1200 km). The UV twilight glow spectrum is similar to the dayglow but weaker in intensity. Second, beyond 120° solar zenith angle, when the upper atmosphere of Titan is in total XUV darkness, there is indication of weak and sporadic nightside UV airglow emissions excited by magnetosphere plasma collisions with ambient thermosphere gas, with similar N[SUB]2[/SUB] excited features as above in the daylight or twilight glow over an extended altitude range. [less ▲]

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See detailCONTRIBUTION OF THE NEW TECHNOLOGIES TO THE REHABILITATION OF THE OLD FALLERS : A PILOT STUDY
ELBOUZ, LEILA; GILLAIN, Sophie ULg; BENDAVID, D et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2012), 10(4), 383-390

Purpose of the study: to verify the interest of vibrosphère™ in the rehabilitation of geriatric fallers Material and method: 24 persons aged 85.5 hospitalized in geriatric wards for a fall during the last ... [more ▼]

Purpose of the study: to verify the interest of vibrosphère™ in the rehabilitation of geriatric fallers Material and method: 24 persons aged 85.5 hospitalized in geriatric wards for a fall during the last 6 months are divided in 2 groups. The group one has performed a classical revalidation and the group 2 a rehabilitation with the technics of vibrosphère™, both during 9 days. The assessment is realized on Day 0 and day 10. It consists in a walking test with Locometrix, a postural assessment a time get up and go and the fall efficacity scale. A control group of 20 non faller subjects aged 79,9 is constituted. Results: in the second population a gain (p< 0.05) is obtained for speed of gait, and also a tendancy in a better frequency, length, symmetry and regularity of step. Postural status is better at the end of the 9 days in the grouped using vibrosphère™. The 2 ways of rehabilitation have similar effects on the gait and balance parameters. Conclusion: our study confirms efficiency of rehabilitation program for 9 days which is rather short. The improvements show that vibrosphère™ is a well adapted tool to revalidate geriatric fallers. Its effect on balance should explain the benefit observed in the gait parameters. This technique seems to be complementary with classical rehabilitation in old geriatric hospitalized patients. [less ▲]

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