Results 271 to 280 of about 14,548,304 (313)
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Controls of the spatial variability of Cr concentration in topsoils of a central French landscape
Geoderma, 2006The aim of this study is to determine the factors that control the spatial variability of chromium in the topsoil at the landscape scale by using a combination of both individual soil pit informations and systematic soil sampling analyses. The 11 ha study area, located in Massif Central (France), includes contrasted bedrock and topography.
Salvador-Blanes, Sébastien +3 more
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Environmental Science & Technology, 2009
Spatial patterns in mercury cycling and bioaccumulation at the landscape level in the Everglades were investigated by collecting and analyzing multimedia samples for mercury species and biogeochemical characteristics from 228 randomly located stations.
Guangliang, Liu +9 more
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Spatial patterns in mercury cycling and bioaccumulation at the landscape level in the Everglades were investigated by collecting and analyzing multimedia samples for mercury species and biogeochemical characteristics from 228 randomly located stations.
Guangliang, Liu +9 more
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Variable Spatial Springs for Robot Control
2001This article presents a passive way to implement varying spatial springs. These are springs with controlling ports which can be used to modify their spatial rest length or spatial properties. These controlling ports have a dual structure which allows one to supervise the potential energy injected into the spring by varying its properties.
Stramigioli, Stefano, Duindam, V.
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Spatial Variability in Salt Marsh Drainage Controlled by Small Scale Topography
Journal of Geophysical Research: Earth Surface, 2023AbstractWater movement in coastal wetlands is affected by spatial differences in topography and vegetation characteristics as well as by complex hydrological processes operating at different time scales. Traditionally, numerical models have been used to explore the hydrodynamics of these valuable ecosystems.
Carmine Donatelli +5 more
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Industrial implementation of spatial variability control by real-time SPC
SPIE Proceedings, 2016Advanced technology nodes require more and more information to get the wafer process well setup. The critical dimension of components decreases following Moore’s law. At the same time, the intra-wafer dispersion linked to the spatial non-uniformity of tool’s processes is not capable to decrease in the same proportions.
O. Roule, F. Pasqualini, M. Borde
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Land Use Controls on the Spatial Variability of Dissolved Black Carbon in a Subtropical Watershed
Environmental Science & Technology, 2018Rivers export roughly 250 Pg of dissolved organic carbon (DOC) to coastal oceans. DOC exported from rivers can be a reflection of watershed dynamics, and changes in land use can lead to shifts in the molecular composition and reactivity of riverine DOC. About 10% of DOC exported from rivers is dissolved black carbon (DBC), a collection of polycondensed
J. Alan Roebuck +3 more
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Hydrobiologia, 2012
Water temperature, organic matter quality and quantity and macrofauna activity generally regulate the seasonal evolution of benthic oxygen uptake in coastal areas. We hypothesize that highly productive lagoons can represent an exception in this respect, due to alternating sequences of phytoplankton bloom, dystrophy and collapse events, coupled with ...
Žilius, Mindaugas +4 more
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Water temperature, organic matter quality and quantity and macrofauna activity generally regulate the seasonal evolution of benthic oxygen uptake in coastal areas. We hypothesize that highly productive lagoons can represent an exception in this respect, due to alternating sequences of phytoplankton bloom, dystrophy and collapse events, coupled with ...
Žilius, Mindaugas +4 more
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The Synthesis of Variable Structure System for the Control of Quadrotor Spatial Motion
Applied Mechanics and Materials, 2017The method of the synthesis of multi-channel decentralized variable structure system for the control of quadrotor spatial motion is developed in this paper. The control law based on the formation of the sliding mode in the separate subsystems of each coordinates control is formed. Each subsystem includes two loops for Cartesian coordinates and relevant
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Environmental controls on the spatial variability of soil water dynamics in a small watershed
Journal of Hydrology, 2017Abstract Soil water content (SWC) in the root zone is controlled by a suite of environmental variables. Complication arises from the cross-correlation between these environmental variables. Therefore, there is still a poor understanding on the controls of root zone SWC dynamics due, in part, to a lack of an appropriate method to untangle the controls.
Wei Hu +3 more
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Spatial Variability in Disturbed Boreal Ecosystems: Aboveground and Belowground Controls
2015The recent open pit mining for oil sands in the Athabasca Oil Sands Region (AOSR), northern Alberta has created an unprecedented industrial scale disturbance whose ecological consequences is not well understood, and requires intensive investigation.
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