L'espacement de la lecture: Althusser, Derrida, and the theory of reading

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Early height growth patterns of planted white spruce seedlings in Interior Alaska

Thesis (M.S.) University of Alaska Fairbanks, 20002This study looked at early height growth of planted white spruce Picea glauca (Moench) Voss around the Fairbanks area. The effort focused on two Levels-of-Growing-Stock (LOGS) experimental plantations located in the Bonanza Creek Experimental Forest that incorporated an espacement study. Annual total height was also measured on 16 operational plantations and then compared to LOGS plantations. Average annual total height at Site 2 of the LOGS plantations was significantly greater than at Site 1. A significant difference in height growth between these sites was attributed to differences in aspect. Results showed significant annual total height differences among the espacement plots within the LOGS plantation. The narrowest spacing 1.2 X 1.2 m and widest spacing 3.7 X 3.7 showed a lower annual total height while spacings 1.8 X 1.8 m, 2.4 X 2.4 m, and 3.0 X 3.0 m showed a greater annual total height at age ten. The range of annual total height found at the LOGS sites was not significantly different than the range of annual total height found at the 16 operational plantations. Additionally, path analysis was used to quantify the direct and indirect effects of multiple environmental variables (i.e., percent slope, slope position, competition, aspect, and soil moisture) on growth rate at the operational plantations. It was found that slope position, percent slope, and competition had significant direct effects on growth rate. These results provide insight for resource managers when predicting the height growth of planted white spruce

Modelling and simulation of blood collection systems: improvement of human resources allocation for better cost-effectiveness and reduction of candidate donor abandonment

International audienceFormal Petri net models were used to describe all relevant donor flows of the various blood collection systems; the Petri net models were converted onto discrete-event simulation models, allowing the evaluation of a large number of scenarios and configurations of blood collection systems. Quantitative models were proposed that encompassed all components of the blood collection systems, such as the donor arrival process, resource capacities and performance indicators. Appropriate experimental designs and cost-effectiveness analyses were used to determine the best configurations of human resources and donor appointment strategies

Effets des microsites créés par le Bräcke-monticule sur la croissance de l’épinette noire et du pin gris : résultats des mesures de croissance prises 23 ans après la plantation opérationnelle du lac Caopatina

Le dispositif opérationnel mis en place en 1985 afin d’étudier le rendement du scarificateur Bräcke-monticule est situé au nord du lac Caopatina dans le canton Hazeur, sur le territoire de la compagnie Barette-Chapais. Les arbres ont été rémesurés en 2008, 23 ans après la plantation. Ce rapport a pour but de comparer les hauteurs, les DHP et les volumes de la tige des plants d’épinette noire et de pin gris reboisés sur les différents microsites créés par le Bräcke-monticule et de faire une prévision à long terme du volume marchand à partir du calcul des IQS pour les différents microsites. Les trois variables mesurant la croissance, soit la hauteur, le DHP et le volume de la tige montrent tous les trois qu’il y aurait des gains appréciables en ce qui concerne le rendement des plantations reboisant les plants sur le monticule créé par un Bräcke-monticule

Tectonique salifère et déformation gravitaire de la marge passive sud-gabonaise de l'Albien au Turonien (secteur de Mayumba) Salt tectonic and thin-skinned deformation in south Gabon passive margin during the Albian-Turonian (Mayumba area).

International audienceL'observation de données sismiques de bonne qualité relatives à la marge passive sud-gabonaise montre : 1) les structures extensives, compressives et inversives albo-turoniennes, associées à la tectonique gravitaire au-dessus du niveau salifère Ezanga (Aptien supérieur). D'est en ouest, ces structures synsédimentaires, d'échelle kilo-métrique, sont en blocs basculés, en anticlinaux, en roll over, en " carapace de tortue ", de nouveau en plis et failles inverses, et enfin en langues de sel déversées vers l'ouest. 2) l'influence du niveau salifère sur la structuration gravitaire ; 3) l'héritage passif syn-rift au niveau des zones hautes anté-salifères qui favorisent la terminaison du sel en biseau et la caractérisation de deux domaines structuraux : l'un interne, peu subsident, où se développent des structures de faible espacement et l'autre externe, très subsident, marqué par des structures de grand espacement. Observation of excellent quality seismic data from the passive margin of the South Gabon basin margin shows: i) Structures associated with thin-skinned deformation of the albo-turonian platform over the Ezanga salt formation (Upper Aptian). The study domain shows a series of Albian-Turonian kilometric extensional, compressional and inver-sional syn-sedimentary structures. From east to west, the domain features tilted blocs, fold and anticline structures, roll-over and turtleback extensive structures, and again fold and inverse faults compressional structures and west-wards salt overhangs. ii) The role of the salt layer in the structural thin-skinned distribution. iii) The high topographic syn-rift control by exhibiting the bevelled salt ending and the characterisation of two structural domains: an internal domain characterised by low subsidence and short extensional structures, and an external domain characterised by high subsidence and long extensional structures

Wetting morphologies on randomly oriented fibers

We characterize the different morphologies adopted by a drop of liquid placed on two randomly oriented fibers, which is a first step toward understanding the wetting of fibrous networks. The present work reviews previous modeling for parallel and touching crossed fibers and extends it to an arbitrary orientation of the fibers characterized by the tilting angle and the minimum spacing distance. Depending on the volume of liquid, the spacing distance between fibers and the angle between the fibers, we highlight that the liquid can adopt three different equilibrium morphologies: (1) a column morphology in which the liquid spreads between the fibers, (2) a mixed morphology where a drop grows at one end of the column or (3) a single drop located at the node. We capture the different morphologies observed using an analytical model that predicts the equilibrium configuration of the liquid based on the geometry of the fibers and the volume of liquid