Future surface mass balance contribution of the Antarctic ice-sheet to sea level rise

Scientific conference (2012, December 04)

Most of the IPCC-AR4 global circulation models predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. High-resolution modeling ... [more ▼]

Most of the IPCC-AR4 global circulation models predict an increase of the Antarctic Surface Mass Balance (SMB) during the 21st century that would mitigate global sea level rise. High-resolution modeling is necessary to adequately capture the Antarctic SMB, that is why we present here a downscaling method leading to 15-km SMB resolution for century time-scales over Antarctica. Our first results show that a higher resolution induce at the same time more run-off but a significantly higher mitigation of sea level rise for the next centuries. [less ▲]

La réforme du master bioingénieur en Sciences et Technologies de l’Environnement par le biais des compétences

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

Relationship between milk composition estimated from mid infrared and methane emissions in dairy cows

Scientific conference (2012, December 03)

N/A

Tailor-made degradable copolymers for the design of advanced drug delivery systems

Conference (2012, December 03)

Cassini UVIS observations of Titan nightglow spectra

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 ▲]

CONTRIBUTION OF THE NEW TECHNOLOGIES TO THE REHABILITATION OF THE OLD FALLERS : A PILOT STUDY

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 ▲]

Signatures of rotation in oscillation spectra

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 ▲]

A Photometric Study of the Hot Exoplanet WASP-19b

E-print/Working paper (2012)

Context: When the planet transits its host star, it is possible to measure the planetary radius and (with radial velocity data) the planet mass. For the study of planetary atmospheres, it is essential to ... [more ▼]

Context: When the planet transits its host star, it is possible to measure the planetary radius and (with radial velocity data) the planet mass. For the study of planetary atmospheres, it is essential to obtain transit and occultation measurements at multiple wavelengths. Aims: We aim to characterize the transiting hot Jupiter WASP-19b by deriving accurate and precise planetary parameters from a dedicated observing campaign of transits and occultations. Methods: We have obtained a total of 14 transit lightcurves in the r'-Gunn, IC, z'-Gunn and I+z' filters and 10 occultation lightcurves in z'-Gunn using EulerCam on the Euler-Swiss telescope and TRAPPIST. We have also obtained one lightcurve through the narrow-band NB1190 filter of HAWK-I on the VLT measuring an occultation at 1.19 micron. We have performed a global MCMC analysis of all new data together with some archive data in order to refine the planetary parameters and measure the occultation depths in z'-band and at 1.19 micron. Results: We measure a planetary radius of R_p = 1.376 (+/-0.046) R_j, a planetary mass of M_p = 1.165 (+/-0.068) M_j, and find a very low eccentricity of e = 0.0077 (+/-0.0068), compatible with a circular orbit. We have detected the z'-band occultation at 3 sigma significance and measure it to be dF_z'= 352 (+/-116) ppm, more than a factor of 2 smaller than previously published. The occultation at 1.19 micron is only marginally constrained at dF_1190 = 1711 (+/-745) ppm. Conclusions: We have shown that the detection of occultations in the visible is within reach even for 1m class telescopes if a considerable number of individual events are observed. Our results suggest an oxygen-dominated atmosphere of WASP-19b, making the planet an interesting test case for oxygen-rich planets without temperature inversion. [less ▲]

L'Empowerment au coeur des bouleversements induits par les TIC dans la gestion des ressources humaines

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 ▲]

Phylogeography of the garden dormouse Eliomys quercinus in the western Palearctic region

in Journal of Mammalogy (2012), 93(6),

The garden dormouse, Eliomys quercinus (Rodentia, Gliridae), displays a surprisingly high karyotypic diversity, with the number of chromosomes varying between 2N ¼ 48 and 2N ¼ 54. We aimed to assess ... [more ▼]

The garden dormouse, Eliomys quercinus (Rodentia, Gliridae), displays a surprisingly high karyotypic diversity, with the number of chromosomes varying between 2N ¼ 48 and 2N ¼ 54. We aimed to assess whether the karyotypic diversity is congruent with the mitochondrial differentiation of the populations; improve our understanding of the taxonomic relationships between garden dormouse populations based on both chromosomal and mitochondrial information; and establish the phylogeographic history of the species and the time of differentiation of mitochondrial lineages of E. quercinus and E. melanurus. For this purpose we sequenced the mitochondrial cytochrome-b (Cytb) gene for 62 E. quercinus and 4 E. melanurus from 27 localities representing all the known chromosomal races of the genus Eliomys in the western Palearctic region. Our results 1st showed that populations of E. quercinus are separated into 4 evolutionarily significant units partially congruent with the chromosomal races and corresponding to Iberian (2N¼48), Italian (2N¼48 or 50), western European (2N¼48, 49, or 50), and Alpine (2N ¼ 52 or 54) mitochondrial lineages or clades. The existence of hybrid individuals between chromosomal races and the presence of several chromosomal races within each mitochondrial lineage both indicate that gene flow persists between chromosomal races. Second, we estimated that the major mitochondrial lineages differentiated from each other around 4.2 6 SD 1 million years ago, thus predating the Quaternary glaciations. Third, E. quercinus displayed a higher haplotypic variability in the Mediterranean peninsula than in the northwestern European populations. However, E. quercinus did not show a pattern of ostglacial recolonization of northwestern Europe from Iberian or Italian populations. Our results also suggest that additional, unexpected refuge regions around the Alps exist for the species. Such information will be useful for deciphering the priorities for the protection of E. quercinus, which is listed as ‘‘Near Threatened’’ on the International Union for the Conservation of Nature Red List of Threatened Species and is protected by Appendix III of the Bern Convention. [less ▲]