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Nonlinear Processes in Geophysics
bne: Nonlinear Processes in Geophysics Îòêðûòûé äîñòóï http://www.nonlin-processes-geophys.net/volumes_and_issues.html
Îòâåòîâ - 2
bne: Nonlin. Processes Geophys., 15, 389-395, 2008 www.nonlin-processes-geophys.net/15/389/2008/ © Author(s) 2008. This work is distributed under the Creative Commons Attribution 3.0 License. Small world in a seismic network: the California case A. Jiménez1, K. F. Tiampo1, and A. M. Posadas2 1Department of Earth Sciences Biological and Geological Sciences, University of Western Ontario, London, Canada 2Department of Applied Physics, University of Almería, Almería, Spain Abstract. Recent work has shown that disparate systems can be described as complex networks i.e. assemblies of nodes and links with nontrivial topological properties. Examples include technological, biological and social systems. Among them, earthquakes have been studied from this perspective. In the present work, we divide the Southern California region into cells of 0.1°, and calculate the correlation of activity between them to create functional networks for that seismic area, in the same way that the brain activity is studied from the complex network perspective. We found that the network shows small world features.
bne: Nonlin. Processes Geophys., 14, 811-821, 2007 www.nonlin-processes-geophys.net/14/811/2007/ © Author(s) 2007. This work is licensed under a Creative Commons License. Statistical measures of distribution patterns of silicon and calcium in marine sedimentary layers K. Bube, T. Klenke, J. A. Freund, and U. Feudel Institut für Chemie und Biologie des Meeres, Carl von Ossietzky Universität Oldenburg, Germany Abstract. We analyze electron microscope X-ray spectroscopy data of recent supratidal marine sediments. Statistical measures are used to characterize the distribution of silicon and calcium in different layers of the sediments. We also use cluster analysis and symbolic dynamics to filter measurement noise and to classify different density regions. This allows to calculate characteristic patch sizes which reflect the sizes of individual clastic grains and the corresponding pore sizes. Silicon indicates the independent processes in the sedimentation history of certain grains. Calcium is capable to monitor intrinsic early diagenetic processes of biogeochemical calcium mineralization of primary organic matter as documented in more organized distributions with higher clustering. Full Article (PDF, 832 KB) Citation: Bube, K., Klenke, T., Freund, J. A., and Feudel, U.: Statistical measures of distribution patterns of silicon and calcium in marine sedimentary layers, Nonlin. Processes Geophys., 14, 811-821, 2007. Bibtex EndNote Reference Manager
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