Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 190 for “"spatial pattern"”.
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Does the Presence of a Non-Coincident Visual Spatial Pattern Facilitate Spatial Pattern Learning? Implications for a Dedicated Spatial Pattern Learning System
<p>Spatial pattern learning is defined as an ability to learn spatial relationships of objects in space without the use of discrete visual landmarks or environmental geometry (Brown & Terrinoni, 1996). Spatial pattern learning has been suggested to be a distinct form of learning because it is not …
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Some problems in the analysis of spatial pattern
Measurement of spatial pattern is of interest in many fields of study including forestry, ecology, archaeology, geography, astronomy, etc. Some new methods for measuring various aspects of spatial patterns formed by point events in the plane, are proposed.Sampling a population in the plane is …
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Data-intensive spatial pattern discovery based on generalized spatial point representations
Geospatial big data consisting of records at the individual level or with fine spatial resolutions, such as geo-referenced social media posts and movement records collected using GPS, provide tremendous opportunities to understand complex geographic phenomena and their space-time dynamics. Such …
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Spatial pattern of African Easterly Waves and their Precipitation in Northern Africa
… around 700-850 hPa. This study explores the spatial distribution of AEWs and their precipitation using the Tropical Easterly Waves Climatology and the Integrated Multi-satellite Retrievals for Global Precipitation Measurement (IMERG). First, a spatial filter is used to limit 2001-2021 …
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Spatial Pattern Analysis of Tree Species Distribution in a Central Appalachian Upland Heath Barren
The spatial pattern of plants reflects biotic and abiotic factors, including interactions with surrounding environmental conditions and other plants. Appalachian heath systems are presently understudied regarding spatial point pattern research, despite representing a unique and biologically …
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Legacy soil contamination by crude oil from the First Gulf War : geochemical characteristics, spatial pattern and environmental risk
… knowledge, to develop 3-D predictive models for spatial distribution of the contaminated soils and remediation strategies based on site-specific environmental risk assessment.The soil-borne petroleum hydrocarbons were spatially variable. Most of lighter petroleum hydrocarbons in the oil lake area …
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Variables Related to the Spatial Pattern and Volume of Tofc Commodity Flows: The Example of The Northern Plains
Made available in DSpace on 2014-12-10T23:41:38Z (GMT). No. of bitstreams: 1 7511732.pdf: 5158205 bytes, checksum: e947fd6a49df365cb1e8737c43bbb7e8 (MD5) Previous issue date: 1974
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Cultural characteristics, vegetative compatibility, and spatial pattern of white hypovirulent strains of Cryphonectria parasitica on grafted American chestnut trees
… morphology (CM) groups based on degree and pattern of pigmentation, and type of colony margin in culture. The two largest CM groups contained 37 (CM group 3) and 33 (CM group 1) isolates. Single-spore colonies from the original, white inoculated strain, EP-49, were classified to CM groups 3 …
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Lyme Disease Emergence in Virginia: An Examination of the Demographic and Environmental Variables Correlated to the Spatial Pattern of Disease Incidence
… census tracts. Analysis was carried out using a spatial Poisson regression model. Of the original 15 variables, 10 were significantly correlated to Lyme disease. The six that were positively correlated with disease incidence include percent herbaceous land, percent water, two edge contrast …
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Effect of geochemical processes and environment on the spatial pattern of selenium in soil, surface water, and groundwater at the Hovland Ranch, central South Dakota
… with elevation. Total selenium has very little spatial variation over the area with insignificant standard deviation, but the spatial distribution of water soluble selenium is distinct with high standard deviation. </p><p>All the chemical analysis data suggest that sodium, magnesium and sulfate …
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Charting the hippocampal cognitive map: Investigating the emergence of grid cell and place cell firing patterns in novel and familiar environments
… role in shaping the emerging grid cell spatial pattern in novel environments. We show that over a three-hour novel environment trial place and size-matched grid fields display similar field size convergence dynamics. This is to be expected if place cells contribute to grid cell …
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Self-organising an indoor location system using a paintable amorphous computer
… methods for self-organising a precisely defined pattern of intertwined number sequences which may be used in the rapid deployment of a passive indoor positioning system's infrastructure.<br/>A future hypothetical scenario is used where computing particles are suspended in paint and covered over a …
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Changing spatial structure of major Chinese cities
This paper examines the spatial structures of commercial real estate buildings (Offices, Retails) in four Chinese cities: Beijing, Shanghai, Shenzhen, and Guangzhou. In contrast to previous studies, this paper focused on the changes of the spatial pattern by involving the time variables to …
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Collective innovation spaces in Shanghai : spatial patterns and social life/
… spaces have started to exhibit a distinctive spatial pattern and made an impact on urban life. However, few systematic studies have been carried out to understand this spatial pattern and the mechanisms behind it. This thesis takes Shanghai as the study site. Using statistical model and …
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Building the urban field in Seattle : a neighborhood
… an . architecture of the city is through its spatial pattern. The spatial patterns of modem cities are to a large extent impacted by systems -organized systems of circulation for cars and people, as well as ownership. This thesis attempts to explore an architectural-urban design through a …
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Spatial and Temporal Genetic Heterogeneity in a Natural Daphnia Population: Ecological and Physiological Differences Between Genotypes (Cladocera, Freshwater, Parthenogenesis)
A three and one-half year study of spatial and temporal genetic heterogeneity in a population of the cyclically, parthenogenetic cladoceran, Daphnia pulex, inhabiting a permanent farm pond in east-central Illinois, indicated that electrophoretically distinct genotypes (clones) are frequently …
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Spatial factors affecting white grub presence and abundance in golf course turf
… variables, golf course management practices and spatial pattern metrics derived from satellite images that underwent two methods of a supervised classification of six land-cover types (turf, woods, wetland, urban, bare soil and water) on four landscape scales derived from 10 km x 10 km buffer …
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The systematics and ecology of Boletes with special reference to the Genus Suillus and its ectomycorrhizal relationships in Nepal
… in the forest were viable in the spring. The spatial pattern of B. merulioides sclerotia in a forest was compared with basidiocarp frequency recorded over four years. Both estimates of the spatial pattern coincided, but year-to-year basidiocarp frequency varied greatly. Individual B. …
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Evaluation of the space-time variability of soil salinity by statistical, geostatistical and bayesian maximum entropy methods
… were: - monitoring the temporal change of the spatial pattern of soil salinity using classical statistical methods; - mapping of soil salinity at unobserved space locations and time instants using classical and modern geostatistical methods like the BME.
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Prescribed Fire in a Florida Landscape with Mixed Ownership: Spatial Interactions
… across a landscape and ownership boundaries, the spatial pattern of fuel load reduction may influence individual landowners' decisions about fire risk management on their own property. We develop and empirically test a spatial econometric model to study the interaction between Florida landowners …
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