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 105 for “"Growth curves"”.
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Analysis of Growth Curves Under Some Special Covariance Structures
<p>In this dissertation we consider the growth curve or generalized MANOVA model in its most general form given by and develop statistical methodology for analyzing data using this model. Here g represents the number of groups, Y<sub>ij</sub> is the observation matrix, ξ is a matrix of unknown …
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An Application of HLM for Modeling Adjustment Growth Curves of Peer-Victimized Children
However, disparate trajectories also demonstrated that loneliness and social dissatisfaction do not necessarily co-occur; nor do school disliking and avoidance. For example, trajectories for children in YYNN indicated increasing loneliness, but not a corresponding decrease in social satisfaction, …
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Graphical methods for the analysis of data.
… presents a graphical procedure for identifying growth curves based on the fitting of a polynomial function to sections or "blocks" of the raw data.
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The Effect of Gamma Irradiation on Growth of Seven Strains of Trypanosoma avium
… treatments. Gross morphology and differences in growth curves associated with varying temperatures suggested that the strains being cultured were not the same. With these differences in mind, the strains were subjected to different dosage levels of gamma irradiation.</p>
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Assessment of Anthropometric Development of Transgender and Gender Non Binary Youth Assigned Female at Birth Across Prepubertal and Pubertal Growth
Objective: Growth and final height are impacted by many factors including sex steroids. Increasing numbers of transgender and gender non binary youth who are assigned female at birth (transmasculine (TM) youth) avoid puberty with endogenous hormones by utilizing gender affirming hormone therapies …
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Compatibility and toxicity of polymer-coated magnetic nanoparticles on mammalian cell systems
(cont.) produced normal growth curves in the presence of particles. However, the particles do still exhibit some toxicity towards the cells, as the maximum cell density of cells cultured with particles does not reach that of control cultures. Both particles were found to increase the oxygen …
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The efficacy of back calculation methods for determining length at age data and the use of such data to determine growth standards, national growth patterns and recruitment dynamics of roach (Rutilus rutilus (L.)), dace (Leuciscus leuciscus (L.)) and chub (Leuciscus cephalus (L.)) in UK rivers
… previous lengths at age and gain age and growth information has long been used as a management tool in fisheries. Calcified structures from fish, including otoliths, fin rays, and vertebrae have been used to gain length at age data. Scales however, are the most common structure used for …
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Toward an Appropriate Fetal Growth Curve for South Dakota
… 4. To construct sex specific and combined fetal growth curves appropriate for babies born in the eastern portion of South Dakota.</p>
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Characterization of a Pathogenicity Gene in Pseudomonas Syringae Pv. Tabaci Strain PTBR2.024
In planta growth curves showed that PTBR4.000 could not reach the same population level in tobacco or green bean leaves as PTBR4.000. A 4.2 kb Hin dIII-Eco RI fragment cloned downstream of a vector promoter was able to restore pathogenicity to PTBR4.000 in intact tobacco leaves. ORF1 and ORF2 were …
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Conditional distributions arising from variation of parameters in non-linear response functions
This paper proposed the idea that the growth of an individual organism follows a mathematical model very closely and that different individuals follow different members of the same parametric family of models. This idea implies that the variation observed between individuals measured at the same …
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Topics in functional data analysis and machine learning predictive inference
… and its interaction with environment on plant growth while adjusting for measurement errors from crowdsourcing image analysis. We assume plant height measurements as discrete observations of growth curves contaminated with MTurk worker random effects and heteroscedastic measurement errors. A …
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Life history of the endangered dwarf wedgemussel, Alasmidonta heterodon (Lea 1829) (Pelecypoda: Unionidae), in the Tar River, North Carolina and Aquia Creek, Virginia
… with glochidia were not documented. Age and growth characteristics were calculated using a thin-sectioning technique on valves collected from the Tar River, Aquia Creek, and the Neversink River, New York. As computed by the von Bertalanffy equation, the dwarf wedgemussel reaches a maximum …
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Modeling and computer simulation of tumor growth and tumor response to radiotherapy
… are compared to corresponding experimental growth curves in vivo. The most important radiobiological parameters are identified and their influence on tumor growth and tumor response to irradiation is quantified. Total doses needed by conventional and accelerated fractionation schemes for …
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A critical analysis of fatigue-crack propagation data for 2024-T3 aluminum.
Fatigue-crack growth data for 2024-T3 aluminum was used to evaluate the accuracy of Forman's equation. Forman's equation was found to predict from one-third to twice the observed cycles to a given crack length when applied to multiple cyclic stress ratios. An alternative approach was developed, …
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The evolution of convergence, growth, and diet under an adaptive landscape framework
… change. My dissertation explores convergence and growth through an adaptive landscape framework, to reconstruct how species were evolving, or populations adapting, to a changing environment. The first chapter of my dissertation explores the evolution of a long snout in reptiles, with exploration …
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Developmental Trajectories of Physical and Relational Aggression and Their Relation to Delinquency and Substance Use in Adolescence
… minority sample of students (N = 2,822). Growth curves showed significant linear increases and quadratic trends for physical and relational aggression. Boys and girls had similar shaped trajectories, but boys reported significantly higher levels of physical aggression than girls. Bivariate …
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Antimicrobial Resistance Mediated By Synthesis of Richmond and Sykes Type I Beta-Lactamase
… and beta-lactam drugs were examined through growth curves. A rapid susceptibility test was evaluated for detection of this resistance. These results emphasize the need to carefully evaluate clinical isolates capable of producing these enzymes before reporting results of rapid susceptibility …
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Predictors of Intraindividual Change in Personality and Well -Being
… occasions. Structural equation models of latent growth curves (see McArdle, 1989; in press) were used to estimate rates of change in extraversion, neuroticism, life satisfaction, work satisfaction, marital satisfaction, and meaning in life over time. Increased work satisfaction predicted …
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The nonlinear evolution of secondary instabilities in boundary layers
… principal forms: Landau constants, amplitude growth curves, and velocity functions. While in good agreement with experiments and simulations, these results offer new explanations to the observed processes. In addition, a physically-based transition criteria is established.
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Mode I Delamination Fracture Characterization of Polymeric Composites under Elevated Temperature
… experiments. This new technique determines crack growth curves, such as stress intensity factor vs. crack growth speed and fracture initiation energy vs. crack initiation time, through the experimentally determined J-integral, Js, for a linear viscoelastic double cantilever beam (DCB) specimen. …
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