Islands worldwide have suffered seabird extinctions after the arrival of humans and alien species they introduced. On Santa Luzia (Cabo Verde), an uninhabited island 35 km2, presence impressive quantity petrel bones in coastal dunes suggested previous existence important colony. Yet, these remains had not been identified no reported for island. This paper characterizes extinct colony discusses ...

Combination prediction models have gained great development in the area of information science, and are widely applied engineering fields. The underwater glider (UG) is a new type unmanned vehicle used ocean observation for advantages long endurance, low noise, etc. However, due to its lower speed relative current, surfacing positioning point (SPP) an UG often drifts greatly away from preset wa...

This study focuses on the geological model of sandstone formations and petrophysical characterization hydrocarbon reservoirs in Termit Basin. The specific objectives are: (1) to establish a visualizing geometry reservoir rocks (2) visualize spatial vertical distribution parameters (porosity, permeability). methodological approach integrated interpretation lithology data petrographic from logs b...

For help in preparation of this article, thanks to Ballard Andrews, Soraya Betancourt, Denise Freed and Martin Hürlimann, Cambridge, Massachusetts, USA; Myrt E. Cribbs, Chevron Energy Technology Company, Houston; Tara Davies, James Du and Ray Kennedy, Edmonton, Alberta, Canada; Peter Eichelberger, Adomite Chemicals, Nalco Energy Services L.P., Sugar Land, Texas; Doris Gonzalez, Houston; Gregory...

Cost reduction is a driving force in the development of brownfield wells.1 It is well known that better planning leads to better execution in the drilling phase with less nonproductive time and reduced costs. This paper describes enhanced well planning workflows in light of recent software technological innovations. The technology, which enables this solution for the first time in the industry,...

According to niche theory, mechanisms exist that allow co-existence of organisms that would otherwise compete for the same prey and other resources. How seabirds cope with potential competition during the non-breeding period is poorly documented, particularly for small species. Here we investigate for the first time the potential role of spatial, environmental (habitat) and trophic (isotopic) s...