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 128 for “"correspondence analysis"”.
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Canonical Correlation and Correspondence Analysis of Longitudinal Data
… study these relationships. Canonical correlation analysis (CCA) is a general multivariate method that is mainly used to study relationships when both sets of variables are quantitative. When the variables are qualitative (categorical), a technique called correspondence analysis (CA) is used. …
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The use of correspondence analysis in building loglinear models
… should be used to gain a "feel" for the data. Correspondence Analysis (an exploratory data analysis procedure) and Log-linear Model building (a confirmatory data analysis procedure) are discussed before an investigation is undertaken to ascertain whether they can be used in conjunction. We …
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The Influence of Livestock grazing on Plant Species Diversity and Distribution at Kiranjeranje Ward-Kilwa District
… ward was studied using multivariate gradient analysis. Vegetation data were collected in 30 established plots using the stratified random sampling method. For each plot established environmental data on edaphic factors and anthropogenic disturbances were also collected. The plant species were …
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Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa
… of this area were investigated using Detrended Correspondence Analysis, Canonical Correspondence Analysis and cluster analysis, in order to compare them with previous studies on the marine biogeography of the area. In the 85 quadrats that were sampled, 97 species of Chlorophyta, Phaeophyta and …
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Assemblage structure and shallow-water habitat use by small-bodied fishes at lower Missouri River sandbars
… and environmental factors were evaluated using Analysis of Variance, Detrended Correspondence Analysis, and Canonical Correspondence Analysis. Samples yielded 49 species from 13 families in depths 0.0-0.5 m; most fishes were [less than or equal to]105 mm TL. Fish mean length increased but …
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Igualdad entre géneros: Hacia un Trabajo Social feminista en el ámbito educativo
… tool used, the data is analyzed using Simple Correspondence Analysis (SCA) and Multiple Correspondence Analysis (MCA) tests. The association between the gender and the age of the student with the questions asked are key variables in the process of gender socialization for the sample studied. …
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Bayesian Model Averaging and Variable Selection in Multivariate Ecological Models
… contrary to the practice of conventional data analysis (such as, for example, stepwise model selection). In addition, variable activation probabilities can be obtained for each variable of interest. This dissertation is aimed at connecting BMA and various ramifications of the multivari-ate …
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Essays on Child Labor and Inequality
… first chapter explains how we can use multiple correspondence analysis to calculate an asset index, and then offers an inequality analysis using the asset index. The second chapter provides a theoretical explanation of an odd relationship between child labor and per capita land holding in a …
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Biplot graphical display techniques
… among statisticians towards exploratory data analysis methods. This school of thought was given momentum by the publication of the book "Exploratory Data Analysis" (Tukey, 1977). The trend has been facilitated by advances in computer technology which have increased both the power and the …
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Correspondence Between Aquatic Ecoregions and the Distribution of Fish Communities of Eastern Oklahoma
… that support similar fish communities. Although correspondence was observed between fish assemblages and three montane ecoregions, the classification system must be refined and expanded to include major drainage basins and physical habitat attributes for some areas to adequately partition …
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Taxonomia e Distribuição de Collembola Poduromorpha da Restinga de Itaipuaçu, Maricá, RJ
… distribution of some species was extended. The correspondence analysis and the multiple regression tests applied to the frequency matrix of taxa showed that the soil moisture, rainfall and temperature were the components that most affected the spatial and temporal distribution of the analyzed …
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The vegetation of Maud Island, Marlborough, New Zealand
… and Coprosma robusta. Two-Way Indicator Species Analysis resulted in the description of eight different plant communities on the island. Detrended correspondence analysis showed a high degree of turnover in species composition among these communities. Canonical correspondence analysis showed that …
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Phytolith Analysis as a Palaeoecological Tool for Reconstructing Mid-to Late-Pleistocene Environments in the Olorgesailie Basin, Kenya
… of organic plant microfossils. Phytolith analysis is used to reconstruct the vegetation history and understand hominin habitat preference during mid-late Pleistocene (~746-64 ka). A localised modern phytolith analogue is used to interpret the fossil assemblage. Descriptive analysis …
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Vegetation, diversity and rarity on the Cape Peninsula, South Africa
… a multivariate classification derived from the analysis of an extensive database (835 plots, 833 species). This rapid system of classification of fynbos showed an 81 similarity with Two-Way Analysis (TWA) classification. Detrended Correspondence Analysis (DCA) and Colonial Analysis (CCA) were …
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Taxonomia e distribuição do gênero Isotomiella Bagnall, 1939 (Collembola, Isotomidae) na Floresta da Tijuca, Rio de Janeiro, RJ, Brasil
… richness, at "Bom Retiro" station. Both the correspondence analysis and the multiple regression showed that the most important elements in the spatial and temporal distribution were the humidity and the temperature of the substratum and the monthly minimum temperature.
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The paleoecology of the Keyser limestone: a re-evaluation
… of the Keyser fauna, utilizing cluster analysis, polar ordination, and detrended correspondence analysis, reveals that the fauna can be arranged along a gradient, according to distance from the shore. Recurrent communities do exist within the Keyser Limestone. With the aid of …
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Exploring the occupational history of the Middle Ontario Iroquoian Dorchester Village site
… Vessel attributes were coded and subject to correspondence analysis to seek plausible temporal sequences. The Brainerd Robinson coefficient of similarity was used to identify plausible temporal phase groups of longhouses by comparison of vessels attributed to specific houses. Multiple ceramic …
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Gestión de la calidad de los procesos de enseñanza en la educación pública en el nivel de educación básica en Bogotá-Colombia.
… multivariate statistics by means of multiple correspondence analysis. The teaching´s evaluation results processes identified in each locality factors linked to teaching processes contributing to the construction of institutional improvement plans and scenarios quality in public education in …
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A gradient analysis of Coleogyne communities in Southern Nevada
… had the lowest species richness; Detrended correspondence analysis (DECORANA) suggested that elevation and soil depth were significantly associated with the distribution of stand and species groups identified from two-way indicator species analysis (TWINSPAN) in the Spring and Sheep Mountain …
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SPATIO-TEMPORAL DYNAMICS OF BIOMES IN THE NORTHWESTERN UNITED STATES (9000 YBP TO THE PRESENT)
… and through the last 9,000 years. The modern analysis used canonical correspondence analysis (CCA) on pollen percentages from recent sediment cores reflecting modern vegetation assemblages and climates to evaluate the amount of influence of selected environmental variables on present species …
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