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 60 for “"Spatial clustering"”.
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The spatial clustering of occupations
… in similar industries. This may be due to firm clustering, but I propose a supply-side mechanism that may also provide an explanation. When workers face a risk of separation from a particular job, they will consider the other jobs available in a particular area in their location decision. Based …
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A Transport Redundancy Approach to Spatial Clustering
… a new random walks-based method for measuring clustering on finite graphs. The method is versatile and can provide valuable insight into the locations of centers of clusters and outliers. Some results and applications are discussed.
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Fast Parallel Algorithms and Library for Spatial Clustering and Computational Geometry
… frameworks for efficiently solving large-scale spatial clustering and computational geometry problems. The primary focus is on designing theoretically-efficient and practical algorithms that can handle the increasing demand for faster processing speeds in spatial data sets. In the first part of …
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Utilitarian Approaches for Multi-Metric Optimization in VLSI Circuit Design and Spatial Clustering
… optimization in VLSI circuit design and spatial pattern clustering. A novel algorithm based on the concepts of utility theory and risk minimization is developed for variation aware multi-metric optimization of delay, power and crosstalk noise, through gate sizing. The algorithm can model …
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Measure of Global Specialization and Spatial Clustering for the Identification of "Specialized" Agglomeration
… of the economy. Thus, the identification of spatial boundaries to measure specialization becomes critical, since most likely the model will be adapted to different scales of distance, and be influenced by different types of externalities or economies of agglomeration, which are based on the …
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Innovation and Growth: Theoretical Models and Analytical Simulations of Spatial, Clustering and Competition Effects
… But knowledge spillovers are also subject to spatial characteristics in its transfer between firms, locations, regions and nations. Similarly, knowledge is used by innovators in many sectors, not just the sector where the knowledge was originally developed. As a result, innovating firms have …
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The structure and spatial distribution of dark matter halos
… of fundamental questions in modern cosmology. Spatial clustering of dark matter halo carry a wealth of information regarding its evolution history and environment. In particular, I study halo assembly bias, which refers to the assembly history dependence of spatial clustering for dark matter …
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White-tailed deer hunting and habitat use in Robert Allerton Park
… to investigate changes in deer habitat use and spatial clustering following 10 years of deer removal in RAP. I evaluated changes in annual deer counts within RAP’s three main habitat types, dry mesic upland forest, wet mesic floodplain forest and developed land using a generalized linear mixed …
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Locational Distribution of Global Advanced Producer Service Firms in the Polycentric US Metropolis
… centers differ from each other in terms of spatial clustering patterns and sectoral distributions of transnational advanced producer service firms. Spatial clustering patterns of advanced producer service firms are evaluated according to high-rise and high-density criteria. In ten selected …
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Using Bayesian Hierarchical Models to Study the Spatial and Temporal Distribution of Mammals in Serengeti National Park
… on environmental variables while accounting for spatial and temporal dependence. We develop a join statistic to measure the spatial dependence of data. Then we create a metric that compares the spatial clustering that exists when the data is compared at different time intervals. This shows how …
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Clustering, Segregation and the 'Ghetto': the spatialisation of Jewish settlement in Manchester and Leeds in the 19th century
… of the literature on 'ghettos' suggests that the clustering of identifiable minorities is commonly associated with segregation - be it physical, economic, social or linguistic - although it is the physical segregation which tends to be most frequently noticed. Moreover, one type of segregation, …
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Concentration and dispersion of primary care physicians and implications for access to care in Cook County, Illinois: 2000-2008
… goal of this research is to analyze the changing spatial distribution and clustering of primary care physicians in Cook County, Illinois from 2000 to 2008. Using data from the American Medical Association's Physicians Master File for 2000 and 2008, primary care physician locations are geocoded, …
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Out of home placement location and juvenile delinquency: the investigation of neighborhood impact on child welfare population's juvenile justice involvement
… (PHDCN). I started from visualizing spatial distribution of foster care placements in ArcGIS. I used exploratory spatial data analysis in GeoDa to measure spatial clustering of foster care placements. I compared the spatial clustering of foster care placements and the spatial …
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A Methodology for Finding Uniform Regions in Spatial Data and its Application to Analyzing the Composition of Cities
… of the composition of cities, a polygon-based spatial clustering and analysis framework for studying urban evolution is proposed in this thesis. A spatial clustering algorithm named CLEVER is used to identify urban patches that are clusters of polygons representing different elements of the …
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Wildlife Road Mortality on the 1000 Islands Parkway in South Eastern Ontario: Peak Times, Hot Spots, and Mitigation Using Drainage Culverts
… better inform mitigation options. Temporal and spatial clustering was significant for five taxonomic groups: snakes were found dead on the road primarily in September, turtles in June, frogs in July, and birds and mammals in June and July. The majority of turtles found on the Parkway were adult …
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GIS-based evaluation of mid-block pedestrian crossing safety
… software; This thesis evaluates the potential of spatial clustering techniques and nearest neighbor methods to identify areas where high concentrations of mid-block crashes are occurring. The methodology was tested and validated using a case study of mid-block locations in the Las Vegas …
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The Economics of Crime and Punishment: A Computational Approach
… are observed empiricallyin cities. For example, spatial clustering of crimes is observed. It is difficult to explain this clustering with Becker's crime model using representative agents. We extend Becker's model using an agent-based approach to explain this phenomenon. First, we develop a grid …
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Integrating Spatial and Temporal Methods Into Surveillance for Shiga Toxin Producing Escherichia Coli (Stec) O157:H7 in Illinois
Temporal and spatial clustering was identified for sporadic cases. Temporal patterns showed an increase in cases from late spring to early fall annually. Areas of decreased risk were found in the southern third of the state and the most urban areas surrounding Chicago. Risk factors associated with …
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Integrating Deep Web Data Sources
… modeling of interfaces and develop a novel spatial clustering algorithm to extract the hierarchical schema of query interface. Second, we develop a novel interactive clustering-based matching algorithm to accurately match a large number of schemas and effectively resolve uncertain mappings …
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