Results 191 to 200 of about 1,164,049 (249)
Some of the next articles are maybe not open access.
Water Research, 2004
Outdoor stream mesocosm studies conducted between 1992 and 1996 at two facilities enabled the investigation of structural variability in invertebrate assemblages within and between studies. Temporal variability of benthic invertebrate assemblages between eight replicate streams within a study was assessed in a 28-day mesocosm study without chemical ...
Don Whittle +4 more
openaire +3 more sources
Outdoor stream mesocosm studies conducted between 1992 and 1996 at two facilities enabled the investigation of structural variability in invertebrate assemblages within and between studies. Temporal variability of benthic invertebrate assemblages between eight replicate streams within a study was assessed in a 28-day mesocosm study without chemical ...
Don Whittle +4 more
openaire +3 more sources
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
openaire +3 more sources
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
openaire +3 more sources
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.
openaire +1 more source
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.
M. Borde, F. Pasqualini, O. Roule
openaire +2 more sources
Tectonic control of fan size: the importance of spatially variable subsidence rates
Basin Research, 1996We study the geophysical controls on the size of alluvial fans. Simple relationships between catchment characteristics, sediment yield, subsidence patterns and fan size are developed. As predicting fan size is essentially a conservation of mass problem, our analysis is general, applying to all types of fan landform. The importance of spatially variable
Carolyn R. Trayler, Kelin X. Whipple
openaire +2 more sources
Spatial Variability in Disturbed Boreal Ecosystems: Aboveground and Belowground Controls [PDF]
, 2015 The 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.
openaire +1 more source
Spatial Variability of Nitrous Oxide Fluxes and Controlling Soil and Topographic Properties
Journal of Environmental Quality, 1997AbstractSpatial heterogeneity of nitrous oxide (N2O) flux was characterized along with various soil chemical, physical, and microtopographical properties to identify those determining flux in fertilized grassland in spring 1993 and in fertilized winter wheat in spring 1994. Measurements were made at random locations within regular grids.
Bruce C. Ball +3 more
openaire +2 more sources
Agricultural and Forest Meteorology, 2011
Gross Primary Productivity (GPP) is a critical measure of the health and sustainability of natural ecosystems. Understanding the magnitude, spatial patterns and processes of GPP will underpin predictions of the impact of climate change on the carbon cycle.
Kanniah, Kasturi Devi +2 more
openaire +3 more sources
Gross Primary Productivity (GPP) is a critical measure of the health and sustainability of natural ecosystems. Understanding the magnitude, spatial patterns and processes of GPP will underpin predictions of the impact of climate change on the carbon cycle.
Kanniah, Kasturi Devi +2 more
openaire +3 more sources
Spatially-Constant Material Removal Control Under Variable-Speed Robotic Sanding
Volume 2: Manufacturing Processes; Manufacturing Systems; Nano/Micro/Meso Manufacturing; Quality and Reliability, 2020Abstract During manufacturing, minor flaws in the surface of commercial airplane interior panels are often corrected using hand sanding, sometimes leading to repetitive stress injuries. Robotic sanding is an attractive option to mitigate these injuries. However, in preprogrammed automated sanding, both the sander path and the speed along
Joseph L. Garbini +2 more
openaire +2 more sources
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
openaire +2 more sources