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Extensionality of Spatial Observations in Distributed Systems

Luís Caires, Hugo Torres Vieira
2007 Electronical Notes in Theoretical Computer Science  
We discuss the tensions between intensionality and extensionality of spatial observations in distributed systems, showing that there are natural models where extensional observational equivalences may  ...  Our results support the claim that spatial observations do not need to be always considered intensional, even if expressive enough to talk about the structure of systems.  ...  Namely, we make precise the claim that spatial observations, including structural ones, may be understood as purely extensional in fairly natural models of distributed systems.  ... 
doi:10.1016/j.entcs.2006.10.056 fatcat:56fi6bb5rbah5d3drrymlusm5q

Enabling Efficient Distributed Spatial Join on Large Scale Vector-Raster Data Lakes

Sebastian Villarroya, Jose R. R. Viqueira, Jose M. Cotos, Jose A. Taboada
2022 IEEE Access  
In particular, the proposed implementation outperforms the state-of-the-art Spark-based spatial analysis systems by more than one order of magnitude during vector-raster spatial join evaluation.  ...  This paper shows how the assumption of a new spatial data model that includes multi-resolution parametric spatial data types, enables achieving an efficient implementation of a large scale distributed  ...  of Dimensions and Extensional MappingSets is stored in disk and loaded in main memory on system startup.  ... 
doi:10.1109/access.2022.3157405 fatcat:wedgaznhhvaj3oaewzkml5codq

Crustal strain fields in the surrounding areas of the Ordos Block, central China, estimated by the least-squares collocation technique

Wei Qu, Zhong Lu, Ming Zhang, Qin Zhang, Qingliang Wang, Wu Zhu, Feifei Qu
2017 Journal of Geodynamics  
The extensional strains are present in most parts of the Yinchuan, Hetao and Shanxi Grabens.  ...  In order to better understand the recent crustal deformation and geodynamics of this region, we use GPS velocities and employ the least-squares collocation (LSC) technique to estimate the distribution  ...  Acknowledgements The authors are grateful to surveyors who works hard in the areas surrounding the Ordos Block in tough environment to obtain GPS data. Thanks to Prof. M.  ... 
doi:10.1016/j.jog.2017.01.005 fatcat:mu6dcp5m6fbfbizwlimzxi234a

Comparative investigations of surface instabilities ("sharkskin") of a linear and a long-chain branched polyethylene [article]

Teodor I. Burghelea, Hans J. Griess, Helmut Muenstedt
2010 arXiv   pre-print
By combining laser-Doppler velocimetry (LDV) with rheological measurements in both uniaxial extension and shear, the distributions of tensile and shear stresses in extrusion flows are measured for both  ...  An experimental study of the physical origin and the mechanisms of the sharkskin instability is presented.  ...  Kessner for their support with the time-temperature shift of the LLDPE elongational data. Furthermore, we thank the referees for their valuable comments and suggestions.  ... 
arXiv:1001.2619v1 fatcat:qohv6ccaorbwpjzio3pur3egiu

Global-scale control of extensional tectonics on CO2 earth degassing

Giancarlo Tamburello, Silvia Pondrelli, Giovanni Chiodini, Dmitri Rouwet
2018 Nature Communications  
Here we use an ad hoc point pattern analysis to show that there is a spatial correlation between CO 2 discharges and the presence of active fault systems, in particular with those characterized by a normal  ...  Seismic data demonstrate the existence of a positive spatial correlation between gas discharges and extensional tectonic regimes and confirms that such processes would play a key role in creating pathways  ...  The authors declare that the data supporting the findings of this study are available within the supplementary information files.  ... 
doi:10.1038/s41467-018-07087-z fatcat:yseexzzbfzhsponfjlo57ypmqa

Rheological behavior of polymer/layered silicate nanocomposites under uniaxial extensional flow

Jun Uk Park, Jeong Lim Kim, Do Hoon Kim, Kyung Hyun Ahn, Seung Jong Lee, Kwang Soo Cho
2006 Macromolecular Research  
observed only in the exfoliated systems.  ...  The preferred orientation of the silicate layers to the flow direction was observed under uniaxial extensional flow for both intercalated and exfoliated systems, while the strain hardening behavior was  ...  , strain hardening behavior and spatial orientation of the clay under extensional flow.  ... 
doi:10.1007/bf03219088 fatcat:yvb7pr4fxnfeleplwmrkdjfiji

Lower crustal extension across the Northern Carnarvon basin, Australia: Evidence for an eastward dipping detachment

Neal W. Driscoll, Garry D. Karner
1998 Journal of Geophysical Research  
However, the interpretation of an intrasedimentary detachment is not consistent nor supported by the stratal relationships, subsidence patterns, or the spatial and temporal distribution of the deformation  ...  The regional distribution and amplitude of the post-Valanginian subsidence are not consistent with the minor amounts of Tithonian-Valanginian brittle upper crustal extension observed on the margin.  ...  We would like to dedicate this paper posthumously to Larry Sloss, the pioneer of sequence stratigraphy, who provided a critical and thorough review of this manuscript.  ... 
doi:10.1029/97jb03295 fatcat:pr2o6xkdbvgnhcxsd3dj7dhyny

Ridge belts: Evidence for regional- and local-scale deformation on the surface of Venus

M. T. Zuber
1990 Geophysical Research Letters  
We evaluate models for the formation of the ridge belt fan assemblage on Venus through consideration of the orientation, spatial distribution, topographic expression and wavelengths of observed tectonic  ...  However, short wavelength ridges and grooves (10_<),<20 km) that are contained within belts and trend parallel to them are likely to be compressional and extensional, and to reflect both regional and local  ...  The ridge belts form a spatially extensive assemblage in the rolling plains in part of the northern hemisphere of Venus imaged by the Venera 15/16 radar system (Figure 1 ).  ... 
doi:10.1029/gl017i009p01369 fatcat:jb45wu4tmbcp3p5wxug2vpywc4

Imaging, mapping and modelling continental lithosphere extension and breakup: an introduction

G. D. Karner, G. Manatschal, L. M. Pinheiro
2007 Geological Society Special Publication  
As with any professional publication, the quality of the final product is a strong function of the dedication of reviewers within the earth science community. The  ...  These research themes are highlighted in the next section -'Observational characteristics of non-Atlantic extensional systems (offshore)'.  ...  These issues are the subject of the section -'Observational characteristics of non-Atlantic extensional systems (onshore)'.  ... 
doi:10.1144/sp282.1 fatcat:wuth6owyvremtflevw4sumojjq

Megathrust Earthquake Potential of the Manila Subduction Systems Revealed by the Radial Component of Seismic Moment Tensors Mrr

Jing-Yi Lin, Wen-Nan Wu, Chung-Liang Lo
2015 Terrestrial, Atmospheric and Oceanic Sciences  
tensors (Mrr) distribution.  ...  In the southern Manila Trench, with the exception of a few extensional events that occurred locally in the Central Valley Basin, most earthquakes show compressive mechanisms.  ...  Support from the Ministry of Science and Technology, Taiwan, under contract No. 104-2811-M-008-029 and 104-3113-M-008-001 is gratefully acknowledged.  ... 
doi:10.3319/tao.2013.04.29.01(tc) fatcat:4jf62califcl5ig3uvi3aaag6m

Crustal Deformation of Northeastern China Following the 2011 Mw 9.0 Tohoku, Japan Earthquake Estimated from GPS Observations: Strain Heterogeneity and Seismicity

Guojie Meng, Xiaoning Su, Weiwei Wu, Shestakov Nikolay, Hiroaki Takahashi, Mako Ohzono, Mikhail Gerasimenko
2019 Remote Sensing  
Using global positioning system (GPS) observations of northeastern China and the southeast of the Russian Far East over the period 2012–2017, we derived an ITRF2014-referenced velocity field by fitting  ...  Taking an improved multiscale spherical wavelet algorithm, we computed strain rate tensors and analyzed their spatial distribution at multiple scales.  ...  Acknowledgments: We are grateful for Data Center of CMONOC for providing GPS data in this study. Some figures were drawn using the GMT software.  ... 
doi:10.3390/rs11243029 fatcat:yybzvilvajeozc5djcystuqqra

Relevant aspects to the recognition of extensional environments in the field

Ana Milena Suárez Arias, Julián Andrés López Isaza, Anny Juieth Forero Ortega, Mario Andrés Cuéllar Cárdenas, Carlos Augusto Quiroz Prada, Lina María Cetina Tarazona, Oscar Freddy Muñoz Rodríguez, Luis Miguel Aguirre Hoyos, Nelson Ricardo López Herrera
2021 Boletín Geológico  
The description of a brittle extensional environment, which is dominated by normal fault systems, is based on: (I) image interpretation, which aims to find evidence suggestive of an extensional geological  ...  Additionally, the integration of geological and structural observations of the outcrop allows to understand the nature of the geological units, the deformation related to the extensional environment and  ...  To understand the spatial and temporal distribution of geological structures, it must be established whether those observed in the field correspond to primary or secondary structures (Hatcher, 1995; McClay  ... 
doi:10.32685/0120-1425/bol.geol.48.2.2021.543 fatcat:ua7ljo5xgrgubo6xow5tkxhix4

INVITED EDITORIAL Processes and controls in the stratigraphic development of extensional basins

S. Gupta, P. Cowie
2000 Basin Research  
INTRODUCTION The sedimentary rocks that are preserved as the in®ll to continental extensional basins provide a tantalizing record of the evolution of coupled geomorphic±sedimentary systems in response  ...  . and importantly for basin analysts, as we shall see later, these models provide insights into the temporal and spatial distribution of sediment¯uxes released to basins.  ...  ACKNOWLEDGMENTS We thank all the reviewers of papers in this special issue for their considerable effort and ef®ciency in turning around papers rapidly.  ... 
doi:10.1046/j.1365-2117.2000.00139.x fatcat:w3q3ewemnzch7ho3ix4iusnwge

INVITED EDITORIAL Processes and controls in the stratigraphic development of extensional basins

S. Gupta, P. Cowie
2008 Basin Research  
INTRODUCTION The sedimentary rocks that are preserved as the in®ll to continental extensional basins provide a tantalizing record of the evolution of coupled geomorphic±sedimentary systems in response  ...  . and importantly for basin analysts, as we shall see later, these models provide insights into the temporal and spatial distribution of sediment¯uxes released to basins.  ...  ACKNOWLEDGMENTS We thank all the reviewers of papers in this special issue for their considerable effort and ef®ciency in turning around papers rapidly.  ... 
doi:10.1111/j.1365-2117.2000.00139.x fatcat:5zmzeql6izdpzfbshcymkpen44

Localized vs distributed deformation associated with the linkage history of an active normal fault, Whakatane Graben, New Zealand

Casey W. Nixon, Jonathan M. Bull, David J. Sanderson
2014 Journal of Structural Geology  
is highly variable, than networks where deformation is more 467 distributed. 468 The presence of both localized and distributed regimes of faulting within a fault 469 system has also been observed by  ...  In this section we investigate the spatial distribution 340 of extensional strain and examine the partitioning of strain between different 341 faults within the fault network. 342 Strain partitioning  ... 
doi:10.1016/j.jsg.2014.06.005 fatcat:nhkrwvgiezaozi6up3llb74eau
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