3 research outputs found
Compound Heterozygote for Both Rare Apolipoprotein E1(Gly127âAsp, Arg158âCys) and E3(Cys112 â Arg, Arg251 â Gly) Alleles in a Multigeneration Pedigree with Hyperlipoproteinaemia
Amélioration de la qualité des stations permanentes françaises à large bande possédant des installations à forage peu profond
International audienceWithin the framework of the RĂ©sif (French seismological and geodetic network) research infrastructure, a major extension of the French permanent broadband network (RLBP) has been initiated in 2011 with the objective to reach ~190 stations by 2020. This network will allow a more homogeneous covering of metropolitan France, encompassing a wide variety of tectonic and geological units. Presently the RLBP network consists in 124 operating stations.For each new potential site a test was conducted for ~3 weeks, usually burying the broadband sensor at 50-80 cm depth directly in the ground or within a light temporary vault.For the final set-up, we tested various hosting infrastructures at three prototype sites and decided to promote the installation of a posthole sensor in a steel-cased shallow borehole, 5-20m deep, for all the sites in open areas. 43 stations have already been installed this way and have been operated for 5 to 20 months.RĂ©sif is a national research infrastructure dedicated to the observation and understanding of the structure and dynamics of the Internal Earth. RĂ©sif is based on high-tech observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout France. The data collected make it possible to study with high spatial and temporal resolution the deformation of the ground, surface and deep structures, seismicity on a local and global scale and natural hazards, and more particularly seismic events, on French territory. RĂ©sif is part of the European (EPOS - European Plate Observing System) and global systems of instruments used to image the Earth's interior as a whole and to study many natural phenomena.Dans le cadre des infrastructures de recherche du RĂ©sif (RĂ©seau sismologique et gĂ©odĂ©sique français), une extension majeure du rĂ©seau haut dĂ©bit permanent français (RLBP) a Ă©tĂ© initiĂ©e en 2011 avec pour objectif d'atteindre ~190 stations en 2020. Ce rĂ©seau permettra une couverture plus homogĂšne de la France mĂ©tropolitaine, englobant une grande variĂ©tĂ© d'unitĂ©s tectoniques et gĂ©ologiques. Actuellement, le rĂ©seau RLBP compte 124 stations opĂ©rationnelles.Pour chaque nouveau site potentiel, un test a Ă©tĂ© effectuĂ© pendant environ 3 semaines, gĂ©nĂ©ralement en enterrant le capteur large bande Ă une profondeur de 50 Ă 80 cm directement dans le sol ou dans une voĂ»te temporaire lĂ©gĂšre.Pour la mise en place finale, nous avons testĂ© diffĂ©rentes infrastructures d'hĂ©bergement sur trois sites prototypes et avons dĂ©cidĂ© de promouvoir l'installation d'un capteur dans un puits de forage peu profond, 5-20m de profondeur, en acier, pour tous les sites en zones ouvertes. 43 stations ont dĂ©jĂ Ă©tĂ© installĂ©es de cette façon et ont Ă©tĂ© exploitĂ©es pendant 5 Ă 20 mois.RĂ©sif est une infrastructure de recherche nationale dĂ©diĂ©e Ă lâobservation et la comprĂ©hension de la structure et de la dynamique Terre interne. RĂ©sif se base sur des rĂ©seaux dâobservation de haut niveau technologique, composĂ©s dâinstruments sismologiques, gĂ©odĂ©siques et gravimĂ©triques dĂ©ployĂ©s de maniĂšre dense sur tout le territoire français. Les donnĂ©es recueillies permettent dâĂ©tudier avec une haute rĂ©solution spatio-temporelle la dĂ©formation du sol, les structures superficielles et profondes, la sismicitĂ© Ă lâĂ©chelle locale et globale et les alĂ©as naturels, et plus particuliĂšrement sismiques, sur le territoire français. RĂ©sif sâintĂšgre aux dispositifs europĂ©ens (EPOS - European Plate Observing System) et mondiaux dâinstruments permettant dâimager lâintĂ©rieur de la Terre dans sa globalitĂ© et dâĂ©tudier de nombreux phĂ©nomĂšnes naturels
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SEIS: Insightâs Seismic Experiment for Internal Structure of Mars
By the end of 2018, 42 years after the landing of the two Viking seismometers on Mars, InSight will deploy onto Marsâ surface the SEIS (Seismic Experiment for Internal Structure) instrument; a six-axes seismometer equipped with both a long-period three-axes Very Broad Band (VBB) instrument and a three-axes short-period (SP) instrument. These six sensors will cover a broad range of the seismic bandwidth, from 0.01 Hz to 50 Hz, with possible extension to longer periods. Data will be transmitted in the form of three continuous VBB components at 2 sample per second (sps), an estimation of the short period energy content from the SP at 1 sps and a continuous compound VBB/SP vertical axis at 10 sps. The continuous streams will be augmented by requested event data with sample rates from 20 to 100 sps. SEIS will improve upon the existing resolution of Vikingâs Mars seismic monitoring by a factor of âŒ2500 at 1 Hz and âŒ200000 at 0.1 Hz. An additional major improvement is that, contrary to Viking, the seismometers will be deployed via a robotic arm directly onto Marsâ surface and will be protected against temperature and wind by highly efficient thermal and wind shielding. Based on existing knowledge of Mars, it is reasonable to infer a moment magnitude detection threshold of âŒ3 at 40â epicentral distance and a potential to detect several tens of quakes and about five impacts per year. In this paper, we first describe the science goals of the experiment and the rationale used to define its requirements. We then provide a detailed description of the hardware, from the sensors to the deployment system and associated performance, including transfer functions of the seismic sensors and temperature sensors. We conclude by describing the experiment ground segment, including data processing services, outreach and education networks and provide a description of the format to be used for future data distribution