Results 261 to 270 of about 14,548,304 (313)

Integrating disease mapping and flexible scan statistics to identify and visualize spatial clusters. [PDF]

PLoS One
Wang L, Hu H, Li Y, Zhang D, Li X, Zhang Z.   +5 more
europepmc   +1 more source

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Variable spatial springs for robot control applications

Proceedings 2001 IEEE/RSJ International Conference on Intelligent Robots and Systems. Expanding the Societal Role of Robotics in the the Next Millennium (Cat. No.01CH37180), 2002
This 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.
Stefano Stramigioli, Vincent Duindam
openaire   +2 more sources

Adaptive control of PDEs with uncertain and spatially variable parameters

2007 American Control Conference, 2007
This tutorial paper presents comprehensive new techniques for adaptive control of PDE systems. It overviews three design methods - the Lyapunov design, the passive design, and the swapping design and discusses tradeoffs between them. The basic ideas for each design are introduced through benchmark plants with constant unknown coefficients. This is then
Andrey Smyshlyaev, Miroslav Krstic
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Selection of spatial frame of reference and postural control variability

Experimental Brain Research, 1997
The present paper addresses the question of the possible links between perceptive visual field dependence-independence and the visual contribution to postural control. In our differential approach, visual field dependent (FD) and independent (FI) subjects were selected on the basis of their score in the Rod and Frame Test (subjective vertical).
B, Isableu, T, Ohlmann, J, Cremieux, B, Amblard   +3 more
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Controls on Spatial Variability of Uranium in Sandstone Aquifers

Groundwater Monitoring & Remediation, 2007
Abstract Controls on the spatial variability of uranium (U) in sandstone aquifers were investigated by water sampling and geophysical logging of wells in the Jacobsville Sandstone in Michigan’s Upper Peninsula. 235 U/ 238 U isotope ...
Heidi M. Sherman, John S. Gierke, Cecilia P. Anderson   +2 more
openaire   +1 more source

The Effect of Spatial and Interpersonal Variables on the Invasion of Group Controlled Territories

Sociometry, 1972
A neglected but important aspect of human territorial behavior is the appropriation of space by two or more individuals. In a previous study it was found that single individuals are extremely reluctant to intrude upon such group-shared space although the degree to which this was true depended upon the spatial parameters of the situation. In the present
J A, Cheyne, M G, Efran
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Control of Protein Adsorption:  Molecular Level Structural and Spatial Variables

Journal of the American Chemical Society, 2004
The adsorption of fibrinogen (Fb) and bovine serum albumin onto polycrystalline Au coated with HS(CH2)3O(CH2CH2O)5CH3 was determined by surface plasmon resonance from bare Au (0% coverage) to the complete ( approximately 100% coverage) self-assembled monolayer (SAM).
David J, Vanderah, Hongly, La, Jessica, Naff, Vitalii, Silin, Kenneth A, Rubinson   +4 more
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Factors Controlling the Spatial Variability of Mercury Distribution in Spanish Topsoil

Soil and Sediment Contamination: An International Journal, 2008
This study characterized the sources and scales of mercury variability in agricultural soils of the river Ebro (9.5 million ha) using geostatistical methods and data from 624 samples. The Ebro basin (20% of Spanish land mass) is an important agricultural area that is industrialized.
Rodríguez Martín, José Antonio, Vázquez De La Cueva, Antonio, Grau, José M., Martínez-Alonso, Celia, López Arias, Manuel   +4 more
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Spatial and temporal variability in the structure of invertebrate assemblages in control stream mesocosms

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 ...
Diana C L, Wong, Lorraine, Maltby, Don, Whittle, Philip, Warren, Philip B, Dorn   +4 more
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Spatial Variability of Nitrous Oxide Fluxes and Controlling Soil and Topographic Properties

Journal of Environmental Quality, 1997
AbstractSpatial 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.
Ball, BC, Horgan, GW, Clayton, H, Parker, JP   +3 more
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