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 85 for “"repeated measurements"”.
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On optimal repeated measurements designs.
On optimal repeated measurements designs.
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The Hearing Aid Evaluation: A Study of Repeated Measurements
Made available in DSpace on 2015-05-12T22:40:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7411951.PDF: 2391714 bytes, checksum: e1d840b496ecac4df180dd06d63994cd (MD5) Previous issue date: 1973
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A Model to Predict 24-Hour Urinary Creatinine Level Using Repeated Measurements
… uncorrelated. However, many of these studies had repeated creatinine measurements for each of their subjects. Repeated measures on the same subject frequently are correlated. Using data from the NIOSH-CDC "Pesticide Dose Monitoring in Turf Applicators" study, this thesis project built a model to …
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An analysis of repeated measurements on experimental units in a two-way classification
In experiments with repeated measurements made on the same subjects, the repeated observations in time may be correlated. Therefore, the assumption of independent observations cannot be made in general. This thesis considers the experimental design with treatments in a two-way classification with a …
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Reliability and Validity of Body Composition and Bone Mineral Density Measurements by DXA
… the QDR-4500A DXA at Virginia Tech. Therefore, measurements of the whole body (WB), lumbar spine (LS), total proximal femur (TPF) and total forearm (TF) were made in a group of young-adult males and females at two time-points, 5-7 days apart. Significant differences were not found in BMD (g/cm2) …
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Normalwerterhebung bei der multifokalen Elektroretinographie bei Monitor- und SLO-Stimulation
… product 43,38 ± 10,79 nV/deg2. On the basis of repeated examinations with monitor stimulation with 10 subjects, coefficients of variation for repeated measurements were calculated. The amplitude density of the b-wave (47,4%) and the scalar products (25,6%) turned out to have clearly higher …
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Development of an on-demand beam pulsing system for Pixe-analysis of thick targets
… beam pulsing system operation were checked by repeated measurements of the system throughput curves, with and without beam pulsing. The reproducibility of the analysis performed using this system was also checked by repeated measurements of the intensity ratios from a number of standard binary …
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Assessment of control and performance of biomedical systems
Introduction: In biomedical systems repeated measurements are often collected, thus presenting a statistical challenge due to high temporal correlation. This research investigates the potential utility of two distinct statistical methodologies in their application. Application: Two clinically …
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Equivalence Tests For Repeated Measures
… For determining equivalence among more than two repeated measurements, recently developed equivalence tests include the omnibus Hotelling T2, the pairwise standardized test, the pairwise unstandardized test, and the two one-sided test for negligible trend. With Monte Carlo simulations, the …
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Novel Statistical Methods for Multiple-variant Genetic Association Studies with Related Individuals
… of power in genetic association tests. Also, repeated measurements of phenotype and dynamic covariates from longitudinal studies bring in more opportunities but also challenges in the discovery of disease-related genetic factors. This dissertation focuses on developing novel statistical …
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Contributions to Functional Data Analysis
Functional data consist of repeated measurements taken over time for each subject. The data for a subject are assumed to be values of a random function that is observed at a discrete time points rather than a sequence of individual measurements. Functional data are classified dense or sparse based …
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Statistical modeling of longitudinal survey data with binary outcomes
… and within subject correlation arising due to repeated measurements. The statistical methods used for analyzing such data should account for stratification, clustering and unequal probability of selection as well as within-subject correlations due to repeated measurements. The complex …
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Semiparametric Bayesian Joint Model With Variable Selection
… and reliability studies, we can often obtain repeated measurements or longitudinal data that includes survival or time-to-event histories. Recently, methods for jointly modeling longitudinal and survival data have gained popularity in the statistical literature. In this dissertation, we …
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Quality of Life After Prostate Cancer Diagnosis: A Longitudinal Prospective Cohort Study in Alberta, Canada
… were re-consented into a follow-up study. Three repeated measurements of physical activity and QoL were undertaken post-diagnosis. RESULTS: We observed improvements in physical QoL in prostate cancer survivors who maintained or adopted higher levels of physical activity pre- and post-diagnosis, …
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Some Clustering Approaches for High-dimensional Data
… and account for the covariance structure between repeated measurements of the same gene over time and between biological replicates. An Rcpp implementation of these methods is provided for efficient computation. For each framework, simulation studies demonstrate that our methods accurately recover …
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Estimation of Parameters in Replicated Time Series Regression Models
… of the methods are made bV fixing the number of repeated measurements in each series, and letting the number of replications <em>n</em> go to infinity. Our theoretical as well as some simulation results show that the quasi-least squares estimates are undoubtedly better than the moment estimates, …
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Bayesian regularized quantile mixed models for longitudinal studies
… studies, the same subjects are measured repeatedly over time, leading to correlations among the repeated measurements. Properly accounting for the intra-cluster correlations in the presence of data heterogeneity and long tailed distributions of the disease phenotype is challenging, …
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Modes of Feeding and Eczema In Infancy
… association between eczema and modes of feeding, repeated measurements were analyzed using general estimating equation models. Any infant feeding in months 2 to 6 that included bottled breast milk was a risk factor for eczema in subsequent months 3 to 7 (OR: 1.29, [1.01, 1.65]). There was no …
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Vibrations of high-speed dental handpieces measured using laser vibrometry
… a diamond RCI, or with a tungsten carbide bur. Repeated measurements were taken from six selected points on the handpiece. Further tests were performed to study the influence of increasing loads (50 to 200 g) whilst cutting into extracted human teeth. Results were investigated using analysis of …
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