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 23 for “"Mixture analysis"”.
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Marginal Mixture Analysis of Correlated Bounded -Response Data
We illustrate the issues and methodology in the context of an immunogenicity study of measles vaccine for children as well as an ultrasound safety study of the occurrence and extent of lung hemorrhage in laboratory animals due to focused ultrasound exposure.
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Spectral Mixture Analysis for Monitoring and Mapping Desertification Processes in Semi-arid Areas in North Kordofan State, Sudan
… processes in North Kordofan State, Sudan.A liear mixture model (LMM) was adopted to analyse and the desertification proccesses by using the image endmembers. interpretation of ancillary data and field observation was adopted to verfiy the role of human impacts in the temporal changes in the study …
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ASSESSING DROUGHT-INDUCED CHANGE IN A PI\xd1ON-JUNIPER WOODLAND WITH LANDSAT: A MULTIPLE ENDMEMBER SPECTRAL MIXTURE ANALYSIS APPROACH
… Mexico by performing multiple endmember spectral mixture analysis (MESMA) on six Landsat images from 2009 through 2015 using field-based spectral endmembers collected throughout 2015. An ideal spectral seperability date was identified to maximize separation between constituent land cover classes …
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New insight into the coordination and reactivity of hetero-substituted maltol and method development for complex mixture analysis of asphaltene.
The metal complexes of maltol and its hetero-substitutions have a wide variety of bioinorganic applications. However, the latest addition to this family of molecules, 3-hydroxy-2-methyl-4H-pyran-4-selenone (selenomaltol), had not previously had its metal complexes characterized. To remedy this, …
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In-Situ Spectrocopy: Gas Mixture Analysis Using A Simplified Multi-Pass Capillary Cell and Optical Considerations In Dual-Pulse Laser-Induced Breakdown Spectroscopy Analysis of Bulk Aqueous Solutions
… spectroscopic method geared towards in-situ analysis of hydrothermal vents. </p> <p> Chapter 1 will describe a novel, yet simple gas sensor that utilizes a fiber-optic Raman sensor coupled to a simplified multi-pass capillary cell (MCC). Improvements in the cleaning methods of the capillary …
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Structural Characterization of Liquid-Chromatographic Effluents via Reverse File-Searching of Fluorescence Spectra
… file-searching to produce a new approach to mixture analysis. The technique operates by separating mixture components in a liquid-chromatograph and submitting them sequentially to a high-performance spectrofluorometer for spectral characterization. The excitation and emission fluorescence …
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Mass Spectrometric Studies on Lignin Sequencing and Fast Pyrolysis, Functional-Group Selective Ion-Molecule Reactions and Reactivity of Bi- and Triradicals
… (MS) has proved to be an invaluable tool for mixture analysis and structural elucidation of mixture components. Tandem mass spectrometry (MS/MS) utilizing collision-activated dissociation (CAD) has become the technique of choice for structural elucidation of unknown analytes. The coupling of …
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MASS SPECTROMETRIC STUDIES ON PETROLEUM ASPHALTENES AND ORGANOSULFUR COMPOUNDS, ON FUNCTIONAL-GROUP SELECTIVE ION-MOLECULE REACTIONS AND ON GAS-PHASE REACTIVITY OF META-BENZYNES TOWARD AMINO ACIDS
… provides an invaluable tool for direct mixture analysis. When coupled with separation methods, such as gas chromatography or high performance liquid chromatography, analysis of minor components in complex mixtures is possible. In addition to the molecular weight information, mass …
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Mass Spectrometric Studies on the Primary Products of Fast Pyrolysis of Carbohydrates and the Molecular Structures of Asphaltenes, and the Development of a Rastering Probe for Laser-Induced Acoustic Desorption into an Atmospheric Pressure Chemical Ionization Source
… (MS) has proven invaluable in the field of mixture analysis and structural elucidation. Tandem mass spectrometry (MS/MS) utilizing collision-activated dissociation (CAD) has become the technique of choice for structural elucidation of unknown analytes in mixtures. When coupled with gas …
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Health disparities, environmental toxicants, and midlife women’s health outcomes
… three statistical methods for phthalate mixture analysis were conducted. We evaluated and compared the predictive capabilities of principal component regression, weighted quantile sum regression, and Bayesian kernel machine regression for both continuous and binomial outcome variables. …
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A Finite Mixture Approach to Covariance Structure Modeling With Unknown, Heterogeneous Populations
… membership is unknown. The field of finite mixture analysis, however, addresses the issues of unknown heterogeneous populations. The finite mixture methodology, therefore, is applied to the problem of covariance structure modeling when the sample represents an unknown mixture of …
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In vitro toxicology of complex mixtures from drinking water disinfection and amine-based carbon capture systems
… Toxicological research into complex mixtures may help to elucidate information on the unknowns in a given system and better identify hazards that might not be obvious by a narrower, single-compound focus. In this thesis, the toxicology of two complex mixture sources was investigated. …
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Wideband and fast THz spectrometer using dual-frequency-comb on CMOS
… provides a powerful tool for complicated gas mixture analysis. Here, a 220-to-320 GHz dual-frequency-comb spectrometer in 65-nm bulk CMOS is presented, along with a systematic analysis on fundamental issues of rotational spectrometer, including the impacts of various noise mechanisms, gas …
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Multisource Remote Sensing based Impervious Surface Mapping
… optical image. An optical and NTL based spectral mixture analysis (ON_SMA) is proposed to achieve sub-pixel IS mapping result in the fourth study. It integrates characteristics of optical and NTL imagery to adaptively select local endmembers. Results illustrate the proposed method yields effective …
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Sequential methodology and applications in sports rating
… but an important modern application is in the analysis of large datasets. This thesis considers both the design and application of sequential methods. A new adaptive sequential Monte Carlo (SMC) methodology is presented. By incorporating adaptive Markov chain Monte Carlo (MCMC) moves into the …
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Tracking urban growth and composition along the western portion of the U.S. - Mexico border: 1985 -2010
… sensing technique Multiple Endmember Spectral Mixture Analysis (MESMA) was used with spatial metrics to compare relative quantities of vegetation, impervious surface and soil, between eight cities along the western portion of the international boundary. Three separate study areas enabled …
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Arid land condition assessment and monitoring using mulitspectral and hyperspectral imagery.
… spectrally. The application of spectral mixture analysis to Hyperion hyperspectral imagery yielded five distinct end-members: two associated with vegetation cover and the remaining three associated with different soils, surface gravel and stone. The specific identity of the image …
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Spectral analysis of total suspended solids mixtures for solids composition determination
Total Suspended Solids (TSS) analysis provides an initial and very basic measure for study and characterization of water quality. The present tedious procedures used for the identification of different solids constituents present in TSS and for the classification or insight into the origins of …
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Methodological developments for mapping soil constituents using imaging spectroscopy
… hyperspectral image data are prepared for an analysis of soil constituents. The data show a large spatial heterogeneity that is caused by the patchiness of the natural vegetation in the study area that is inherent to most semiarid landscapes. Spectral mixture analysis is performed and used to …
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