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Thesis (M.S.)--Air Force Institute of Technology, 2006. / AFIT/GAE/ENY06-S04 GAE 06S. "September 2006." Title from title page of PDF document (viewed on: Nov. 16, 2007). Includes bibliographical references (leaves 135-136).

Thesis (M.F.A.)--Rochester Institute of Technology, 1992. / Typescript. Includes bibliographical references (leaf 48).

When considering smaller scale UAV’s there is not a lot available that could survey large areas quickly, stealthy, and with a considerable range. Owls have an interesting trait that is not found in most avian species; leading-edge serrations. These serrations give owls the ability to fly silently and steadily without sacrificing maneuverability. The focus of the research was to design leading-edge serrations that would improve the flight performance of a Styrofoam glider. Previous studies defined serrations by the inclination angle, tip-displacement angle, and the length of the serration in the x-y plane. Using these parameters, a serration mold was computer modeled and 3D printed from a resin material. Silicone was used to cast the mold, allowing flexible serrations to be created. The serrations were fitted onto the leading-edge of a Styrofoam glider which was used for flight testing. Flight test between serrated and non-serrated leading-edge gliders are presented and compared.

American dialect studies have progressed rapidly within the last thirty years, but the progress seems to be concentrated within the Southern and New England areas of the United States. Though there have been studies made in other areas, they are sporadic, no work of any significance having yet been published. Texas, unfortunately, is one area of rich dialectal significance which has been neglected, with the exception of Oma Stanley's work on the dialect in East Texas. Even though that work is somewhat dated in many respects, few scholars have seen fit to undertake a revision of Stanley's work or a study of other areas of Texas which would be comparable to The Speech of East Texas. Several master's theses add to the small number of studies concerned with Texas dialects, notably Roy Elders' study of the stressed back vowels in the speech of Parker County, but such studies are also too few. The present investigation was undertaken for the purpose of adding to that collection of Texas dialect studies an examination of the low-back vowels in stressed syllables, of certain diphthongs in stressed syllables, and of the change in frequency of usage of those vowels and diphthongs, occurring within recent generations in Denton, Texas.

Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references. Also available on the World Wide Web.

The thesis deals with methods for viability evaluation of the phytopathogenic bacterium Xanthomonas euvesicatoria after low-temperature plasma treatment. Low-temperature plasma produced by Gliding Arc experimental device was used for treatment of X. euvesicatoria. The viability of the bacterial cells was assessed using a scanning electron microscope (SEM) and by measuring of the fluorescence in the Smart-DART device using PrestoBlue chemical reagent. Methodology has been optimised for the sample preparation for the treatment by low temperature plasma and used for evaluation of applied methods. Lethal effect of gliding arc plasma to this gram-negative bacteria was verified by SEM which showed. There is significant structural changes on the cell surface. Viability assessment of X. euvesicatoria using Smart-DART device is a fast, time-saving and inexpensive evaluation of cell viability. The great advantage of this device is its ability to measure the fluorescence in real time. The disadvantage of this method is lower reliability in current stage of research.

abstract: This thesis aims to design of wings for a laminate biped robot for providing locomotion stabilization during jump gliding. The wings are designed to collapse down during the jumping phase to maximize jump height and deployed back for gliding phase using anisotropic buckling in tape spring hinges. The project aims to develop a reliable dynamics model which can be utilized for design and evaluation of optimized systems for jump-gliding. The aerodynamic simulations are run on a vortex-lattice code which provides numeric simulations of the defined geometric bodies. The aerodynamic simulations assist in improving the design parameters such as planform, camber and twist to achieve the best possible Coefficient of Lift for maximizing glide distance. The aerodynamic simulation output is then plugged into a dynamics model built in Python, which is validated and correlated with experimental testing of a key wing designs. The experimental results are then utilized to improve the dynamics model and obtain better designs for improved performance. The simulation model informs the aerodynamic design of wings for sustaining glide for the biped platform and maximizing glide length to increase range. / Dissertation/Thesis / Masters Thesis Aerospace Engineering 2020

Cells are dynamic systems that generate and respond to forces through the complex interplay between biochemical and mechanical regulations. Since cellular processes often happen at the molecular level and are challenging to be observed under in vivo conditions due to limitations in optical microscopy, multiple analysis tools have been developed to gain insight into those processes. One of the ways to characterize these mechanical properties is by measuring their persistence length, the average length over which filaments stay straight. There are several approaches in the literature for measuring the persistence length of the filaments, including Fourier analysis of images obtained using fluorescence microscopy. Here, we show how curvature can be used to quantify local deformations of cell shape and cellular components. We develop a novel technique, called curvature analysis, to measure the stiffness of bio-filaments from fluorescent images. We test our predictions with Monte-Carlo generated filaments. We also apply our approach to microtubules and actin filaments obtained from in vitro gliding assay experiments with high densities of non-functional motors. The presented curvature analysis is significantly more accurate compared to existing approaches for small data sets. To study the effect of motors on filament deformations and velocities observed in gliding assays with functional and non-functional motors, we developed Langevin dynamics simulations of on glass and lipid surfaces. We found that generally the gliding velocity increases with an increase in motor density and a decrease in diffusion coefficient, and that motor density and diffusion coefficient have no clear effect on filament curvatures, except at a very low diffusion coefficients. Finally, we provide an ImageJ plugin to make curvature and persistence length measurements more accessible to everyone.

Cells are dynamic systems that generate and respond to forces through the complex interplay between biochemical and mechanical regulations. Since cellular processes often happen at the molecular level and are challenging to be observed under in vivo conditions due to limitations in optical microscopy, multiple analysis tools have been developed to gain insight into those processes. One of the ways to characterize these mechanical properties is by measuring their persistence length, the average length over which filaments stay straight. There are several approaches in the literature for measuring the persistence length of the filaments, including Fourier analysis of images obtained using fluorescence microscopy. Here, we show how curvature can be used to quantify local deformations of cell shape and cellular components. We develop a novel technique, called curvature analysis, to measure the stiffness of bio-filaments from fluorescent images. We test our predictions with Monte-Carlo generated filaments. We also apply our approach to microtubules and actin filaments obtained from in vitro gliding assay experiments with high densities of non-functional motors. The presented curvature analysis is significantly more accurate compared to existing approaches for small data sets. To study the effect of motors on filament deformations and velocities observed in gliding assays with functional and non-functional motors, we developed Langevin dynamics simulations of on glass and lipid surfaces. We found that generally the gliding velocity increases with an increase in motor density and a decrease in diffusion coefficient, and that motor density and diffusion coefficient have no clear effect on filament curvatures, except at a very low diffusion coefficients. Finally, we provide an ImageJ plugin to make curvature and persistence length measurements more accessible to everyone.