Leptodactylus fallax

Number of Pages: 3Integrative BiologyEarth and Planetary Science

Seasonal variation in soil and plant water potentials in a Bolivian tropical moist and dry forest

We determined seasonal variation in soil matric potentials (¿soil) along a topographical gradient and with soil depth in a Bolivian tropical dry (1160 mm y-1 rain) and moist forest (1580 mm y-1). In each forest we analysed the effect of drought on predawn leaf water potentials (¿pd) and drought response (midday leaf water potential at a standardized ¿pd of -0.98 MPa; ¿md) of saplings of three tree species, varying in shade-tolerance and leaf phenology. ¿soil changed during the dry season and most extreme in the dry forest. Crests were drier than slopes and valleys. Dry-forest top soil was drier than deep soil in the dry season, the inverse was found in the wet season. In the moist forest the drought-deciduous species, Sweetia fruticosa, occupied dry sites. In the dry forest the short-lived pioneer, Solanum riparium, occupied wet sites and the shade-tolerant species, Acosmium cardenasii drier sites. Moist-forest species had similar drought response. The dry-forest pioneer showed a larger drought response than the other two species. Heterogeneity in soil water availability and interspecific differences in moisture requirements and drought response suggest great potential for niche differentiation. Species may coexist at different topographical locations, by extracting water from different soil layers and/or by doing so at different moments in tim

Hyla multifasciata

Number of Pages: 4Integrative BiologyGeological Science

Measurement of disruption forces in JET using fiber-optic sensors

Monitoring the forces induced on the vacuum vessel when a disruption occurs is essential for the protection of the machine. Since divertor coils have been installed in JET, during disruptions a significant difference between the forces measured on the top and the bottom of the machine has been observed. In order to investigate these further, optical fiber transducers FBGs (Fiber Bragg Gratings) were installed in addition to the currently used strain gauges. During VDE (Vertical Displacement Event) tests, these new transducers were used to measure different level of disruptions ranging from 80T up to 230T vertical forces. The results were then compared with the strain gauges. The FBG measurement was carried out using a broadband light source illuminating an array of 4 FBGs through a combination of directional couplers, connectors and fiber-optic cable. The forces measured both by FBG and by the strain gauges are within the same range, except for the initial swing where large random differences are observed. The tests have demonstrated that the FBG-based force measurement system has adequate resolution (±1.52strain corresponding to a force of 4kN due to the geometry of the leg) and measurement range (50002strain or 13000kN) for this application

Leptodactylus rugosus

Number of Pages: 5Integrative BiologyGeological Science

Volumineux lipome de la base du cou chez une chienne

Lombard Charles, Lescure Francis. Volumineux lipome de la base du cou chez une Chienne. In: Bulletin de l'Académie Vétérinaire de France tome 116 n°5, 1963. pp. 235-238

LAOT (Françoise F.), LESCURE (Emmanuel de) (dir.), Pour une histoire de la formation

Ce petit livre rassemble sept articles, dont certains sont issus des contributions au colloque organisé par le Groupe d’étude – histoire de la formation des adultes (GEHFA) à Lyon, le 14 avril 2006, dans le cadre de la huitième Biennale de l’éducation et de la formation, d’autres étant des contributions libres de leurs auteurs. La présentation du volume fait état d’un essor de l’histoire de la formation des adultes, particulièrement sensible dans la deuxième moitié des années 1990. Elle se ré..

Sur un syndrome de vasodilatation paroxystique du cheval en course

Darraspen Ernest Vincent, Lescure Francis. Sur un syndrome de vasodilatation paroxystique du Cheval en course. In: Bulletin de l'Académie Vétérinaire de France tome 117 n°9, 1964. pp. 423-426