Book•
Time-integrative geographic information systems
01 Jan 2001-
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TL;DR: In this paper, the authors describe the rules of the ring, the ring population, and the need to get off the ring in order to measure the movement of a cyclic clock.
Abstract: 1980 Preface * 1999 Preface * 1999 Acknowledgements * Introduction * 1 Circular Logic * 2 Phase Singularities (Screwy Results of Circular Logic) * 3 The Rules of the Ring * 4 Ring Populations * 5 Getting Off the Ring * 6 Attracting Cycles and Isochrons * 7 Measuring the Trajectories of a Circadian Clock * 8 Populations of Attractor Cycle Oscillators * 9 Excitable Kinetics and Excitable Media * 10 The Varieties of Phaseless Experience: In Which the Geometrical Orderliness of Rhythmic Organization Breaks Down in Diverse Ways * 11 The Firefly Machine 12 Energy Metabolism in Cells * 13 The Malonic Acid Reagent ('Sodium Geometrate') * 14 Electrical Rhythmicity and Excitability in Cell Membranes * 15 The Aggregation of Slime Mold Amoebae * 16 Numerical Organizing Centers * 17 Electrical Singular Filaments in the Heart Wall * 18 Pattern Formation in the Fungi * 19 Circadian Rhythms in General * 20 The Circadian Clocks of Insect Eclosion * 21 The Flower of Kalanchoe * 22 The Cell Mitotic Cycle * 23 The Female Cycle * References * Index of Names * Index of Subjects
3,424 citations
TL;DR: In this article, two case studies of cultural landscapes in Southern Germany were conducted to develop appropriate techniques for quantifying and analysing the landscape change since 1850 using a land plot level GIS.
215 citations
Cites background from "Time-integrative geographic informa..."
...Conversely, the mesoxerophytic meadows of South Germany’s montane regions are still regarded as a characteristic landscape feature, despite the fact that they became atypical a long time ago (Boehmer, 1994)....
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...It should be a basis for a historical spatial model of South Germany (Ott and Swiaczny, 2001)....
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01 Jan 1996
TL;DR: It is concluded that the form of the process model allows researchers who operate from different perspectives to enrich their understanding of theprocess of system development and the need for theoretical interpretation of recurring sequences of events.
Abstract: We trace the process of developing and implementing a materials management system in one company over a 15-year period. Using a process research model developed by Newman and Robey, we identify 44 events in the process and define them as either encounters or episodes. Encounters are concentrated events, such as meetings and announcements, that separate episodes, which are events of longer duration. By examining the sequence of events over the 15 years of the case, we identify a pattern of repeated failure, followed by success. Our discussion centers on the value of detecting and displaying such patterns and the need for theoretical interpretation of recurring sequences of events. Five alternative theoretical perspectives, originally proposed by Kling, are used to interpret the sequential patterns identified by the model. We conclude that the form of the process model allows researchers who operate from different perspectives to enrich their understanding of the process of system development.
164 citations
TL;DR: By the use of techniques from computational geometry, including approximation algorithms, this work improves the running time bounds of existing algorithms to detect spatio-temporal patterns of moving point objects, namely flock, leadership, convergence, and encounter.
Abstract: Moving point object data can be analyzed through the discovery of patterns. We consider the computational efficiency of detecting four such spatio-temporal patterns, namely flock, leadership, convergence, and encounter, as defined by Laube et al., 2004. These patterns are large enough subgroups of the moving point objects that exhibit similar movement in the sense of direction, heading for the same location, and/or proximity. By the use of techniques from computational geometry, including approximation algorithms, we improve the running time bounds of existing algorithms to detect these patterns.
160 citations
Cites background from "Time-integrative geographic informa..."
...This is referred to as the snapshot view of time [14]....
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TL;DR: This work improves the running time bounds of existing algorithms to detect spatio-temporal patterns, namely flock, leadership, convergence, and encounter, that exhibit similar movement in the sense of direction, heading for the same location, and/or proximity.
Abstract: Moving point object data can be analyzed through the discovery of patterns in trajectories. We consider the computational efficiency of detecting four such spatio-temporal patterns, namely flock, leadership, convergence, and encounter, as defined by Laube et al., Finding REMO--detecting relative motion patterns in geospatial lifelines, 201---214, (2004). These patterns are large enough subgroups of the moving point objects that exhibit similar movement in the sense of direction, heading for the same location, and/or proximity. By the use of techniques from computational geometry, including approximation algorithms, we improve the running time bounds of existing algorithms to detect these patterns.
129 citations
References
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Book•
01 Jan 1984
TL;DR: In this article, the status of science, technology, and the arts, the significance of technocracy, and how the flow of information is controlled in the Western world are discussed.
Abstract: Many definitions of postmodernism focus on its nature as the aftermath of the modern industrial age when technology developed. This book extends that analysis to postmodernism by looking at the status of science, technology, and the arts, the significance of technocracy, and the way the flow of information is controlled in the Western world.
10,912 citations
TL;DR: In this paper, the authors present a plan of the present work, from absolute space to abstract space, from the Contradictions of Space to Differential Space, and from Contradictory Space to Social Space.
Abstract: Translatora s Acknowledgements. 1. Plan of the Present Work. 2. Social Space. 3. Spatial Architectonics. 4. From Absolute Space to Abstract Space. 5. Contradictory Space. 6. From the Contradictions of Space to Differential Space. 7. Openings and Conclusions. Afterword by David Harvey. Index.
10,114 citations
Book•
01 Jan 1991TL;DR: In this paper, the authors present a survey of statistics for spatial data in the field of geostatistics, including spatial point patterns and point patterns modeling objects, using Lattice Data and spatial models on lattices.
Abstract: Statistics for Spatial Data GEOSTATISTICAL DATA Geostatistics Spatial Prediction and Kriging Applications of Geostatistics Special Topics in Statistics for Spatial Data LATTICE DATA Spatial Models on Lattices Inference for Lattice Models SPATIAL PATTERNS Spatial Point Patterns Modeling Objects References Author Index Subject Index.
8,631 citations