Results 261 to 270 of about 160,073 (300)
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Time Evolution and Spatial Hierarchy of Crack Patterns
Langmuir, 2021Cracks generated due to desiccation of wet colloidal systems are ubiquitous, examples being nanomaterial films, painted walls, cemented floors, mud fields, river beds, and even giant rocks. In all such cases, crack patterns are often appreciably similar but for the length and time scales, which can be widely differing.
Ankush Kumar, G. U. Kulkarni
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Evolution of spatial expression pattern
Evolution & Development, 2003Summary How can complex patterns of gene expression evolve? Understanding the near‐precise repeatability of morphology created by animal development, through the interactions between morphogens and networks of transcription factors, is one of the most difficult outstanding problems in developmental biology.
Louise J, Johnson, John F Y, Brookfield
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Evolution of Urban Spatial Cognition: Patterns of Change in Guangzhou, China [PDF]
Environment and Planning A: Economy and Space, 1988 This paper includes an analysis of the evolution of urban spatial cognition over time among a sample of Chinese students attending Zhongshan University in Guangzhou, China. Changes in the features of sketch maps, based on classifications developed by Lynch, Appleyard, as well as Golledge, are examined.
Y Lee, C G Schmidt
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Spatial-Pattern-Induced Evolution of a Self-Replicating Loop Network
Artificial Life, 2006We study a system of self-replicating loops in which interaction rules between individuals allow competition that leads to the formation of a hypercycle-like network. The main feature of the model is the multiple layers of interaction between loops, which lead to both global spatial patterns and local replication. The network of loops manifests itself
Keisuke Suzuki, Takashi Ikegami
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Spatial and Temporal Patterns in the Evolution of the Flora of the European Alpine System
Taxon, 2003AbstractThis paper presents a perspective of how phylogenetic and phylogeographic hypotheses, based on nuclear DNA sequence variation (ITS) or amplified fragment length polymorphisms (AFLPs), can provide insights into the origin and evolution of the European high mountain flora.
Hans Peter Comes, Joachim W. Kadereit
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Evolution of Spatial Pattern Formation by Autonomous Bio-Inspired Cellular Controllers
Advances in Artificial Life, ECAL 2013, 2013In this paper, a gene regulatory network called FGRN (Fractal Gene Regulatory Network) and a reaction-diffusion system called AHHS (Artificial Homeostatic Hormone System) are investigated for spatial pattern formation. The two bioinspired controllers possess similar and different features in terms of their underlying processes, structures, and ...
Payam Zahadat +2 more
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Evolution and spatial patterns of spheres of urban influence in China
Chinese Geographical Science, 2013Cet article présente les résultats d'une étude des sphères d'influence urbaine en ce qui concerne toutes les villes de Chine (à l'exclusion de Hong Kong, Macao et la province chinoise de Taiwan) dans les années 1990, 2000 et 2009. Un modèle de gravité optimisé avec une distance temporelle complète a été utilisé pour effectuer une analyse détaillée des ...
Kaiyong Wang +3 more
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Characterization and evolution of spatial density patterns in urban areas
Transportation, 1988This paper examines the spatial patterns of population density, household automobile ownership and other socio-demographic variables that affect urban travel, as a function of distance from the central city core. Spatial density functions provide a useful characterization of urban structure, and of its evolution when taken at different time intervals ...
Hani S. Mahmassani +2 more
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The Evolution of Coworking Spaces in Milan and Prague: Spatial Patterns, Diffusion, and Urban Change
2021During the last two decades, the labour market of the advanced economies has changed, with the increased use of short-term contracts and higher flexibility in terms of working spaces and work organization. Due to ongoing processes of the globalization and the Industry 4.0 Revolution, distance, location, and time are often no longer considered necessary
P. Bednar +3 more
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Interacting agents, spatial externalities and the evolution of residential land use patterns
Journal of Economic Geography, 2002We develop a model of land use conversion that incorporates local spillover effects among spatially distributed agents. The model is used to test the hypothesis that fragmented patterns of development in rural-urban fringe areas could be due to negative externalities that create a 'repelling' effect among residential land parcels. Identification of the
Elena G. Irwin, Nancy E. Bockstael
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