Les étirements musculaires : les utilisez-vous adéquatement?

Travail d'intégration réalisé dans le cadre du cours PHT-6113.

Parallel implementation of alternate quadrant interlocking factorisation method on star topology

This paper discusses the parallel implementation of the solution of a set of linear equations using the Alternative Quadrant Interlocking Factorisation Methods (AQIF), on a star topology. Both the AQIF and LU decomposition methods are mapped onto star topology on an IBM SP2 system, with MPI as the internode communicator. Performance parameters such as speedup, efficiency have been obtained through experimental and theoretical means. The studies demonstrate (i) a mismatch of 15% between the theoretical and experimental results, (ii) scalability of the AQIF algorithm, and (iii) faster executing AQIF algorithm.

Potential Climate Change Effects on the Habitat of Antarctic Krill in the Weddell Quadrant of the Southern Ocean

Antarctic krill is a cold water species, an increasingly important fishery resource and a major prey item for many fish, birds and mammals in the Southern Ocean. The fishery and the summer foraging sites of many of these predators are concentrated between 0 degrees and 90 degrees W. Parts of this quadrant have experienced recent localised sea surface warming of up to 0.2 degrees C per decade, and projections suggest that further widespread warming of 0.27 degrees to 1.08 degrees C will occur by the late 21st century. We assessed the potential influence of this projected warming on Antarctic krill habitat with a statistical model that links growth to temperature and chlorophyll concentration. The results divide the quadrant into two zones: a band around the Antarctic Circumpolar Current in which habitat quality is particularly vulnerable to warming, and a southern area which is relatively insensitive. Our analysis suggests that the direct effects of warming could reduce the area of growth habitat by up to 20%. The reduction in growth habitat within the range of predators, such as Antarctic fur seals, that forage from breeding sites on South Georgia could be up to 55%, and the habitat's ability to support Antarctic krill biomass production within this range could be reduced by up to 68%. Sensitivity analysis suggests that the effects of a 50% change in summer chlorophyll concentration could be more significant than the direct effects of warming. A reduction in primary production could lead to further habitat degradation but, even if chlorophyll increased by 50%, projected warming would still cause some degradation of the habitat accessible to predators. While there is considerable uncertainty in these projections, they suggest that future climate change could have a significant negative effect on Antarctic krill growth habitat and, consequently, on Southern Ocean biodiversity and ecosystem services.

Impacts from aquaculture facilities on intertidal ecosystems using quadrant surveys and antibiotic tracers

Senior thesis written for Oceanography 444

Revue de l'enseignement secondaire et de l'enseignement supérieur

1892 (T18,N3).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1891 (A8,T16,N7).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1890/02/15 (A7,T13,N3).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1892 (T18,N14).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1892 (T18,N20).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1891 (A8,T16,N10).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1892 (T18,N13).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1892 (T18,N2).

Revue de l'enseignement secondaire et de l'enseignement supérieur

1889/10/15 (A6,T12,N8).