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 16 of 16 for “"PDV"”.
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Determinants of Dating Violence Among Youth in the U.S.
Background: Physical Dating Violence (PDV) victimization is a major public health concern among adolescents in the United States. Research has shown that determinants of PDV victimization are different for male and female adolescents. However, inconsistent findings entail that further research …
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Point Doppler velocimetry measurements in circular jets
… existing 2-component Point Doppler Velocimetry (PDV) system to improve instrument accuracy and repeatability and to reduce mean velocity offset. Most importantly, the original iodine cells have been replaced by vapor-limited iodine cells that are not influenced by room temperature variations. PDV …
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The Constitutive Behavior of Copper at High Strain Rate as Determined by the Free Expansion Ring Test
… introduction of Photonic Doppler Velocimetry (PDV) offered measurement of the velocity of the ring in this technique with higher temporal resolution, reliability and portability. But quantitative analysis of the data from the PDV was a problem, which has been addressed in this thesis. A MATLAB …
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Improved velocity data in circular jets using an avalanche photodiode-based 2-component point Doppler velocimeter
An existing Point Doppler Velocimeter (pDv) has been modified in an effort to improve the RMS velocity results. Improvements have been made by reducing the probe volume size by focusing the incident laser beam, thereby reducing the effects of spatial averaging on the mean and RMS velocity …
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Reactive solids under shock compression
… to a home built photonic Doppler velocimeter (PDV) which tracks the motion of flyer plates and embedded gauges. This system was characterized using PDV to determine the range of impact velocities and shock wave durations that aluminum or copper flyers can impart into materials. Ultrafast …
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Measurements of Magnetic Compression and Melt of Electrically Thick Metals Driven by Lineal Current Densities Characteristic of Pulsed-Power-Driven Fusion Devices
Photonic Doppler velocimetry (PDV) has enabled high-resolution measurements of surface motion on z-pinches, revealing previously unobserved phenomena such as pre-melt radial magnetic compression followed by changes in acceleration corresponding to the solid-liquid phase transition of the surface of …
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Modeling post absorptive amino acid metabolism in dairy cattle
… use and release by the portal drained viscera (PDV) and liver (LIV) of dairy cows, 3) predict EAA use by the mammary (MAM) and non-splanchnic, non-mammary (OTH) tissues, and 4) predict milk protein production from MAM use. To evaluate the first objective, a model was constructed using previously …
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Vision-based estimation and control of airdrop vehicles for aerial deployment of sensor networks
… a prototype of a precision airdrop vehicle (PDV) is suggested, and a vision-based estimation and control system design, using both an IMU (Inertial Measurement Unit) and a vision system to achieve precision airdrop deployment is described. The design was also tested in a …
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Plant virus detection and diversity in a mixed tree fruit orchard determined through metagenomic-based analysis of honeybee (Apis mellifera) collected samples
… Cherry virus A (CVA), prune dwarf virus (PDV), and prunus necrotic ringspot virus (PNRSV) were the most frequently detected viruses, identified in all samples and time points. The nucleotide sequence diversity of the coat protein regions of CVA, PDV, and PNRSV was further analyzed through …
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A dimensão dialógica dos atos ilocucionários na tessitura argumentativa dos gêneros acadêmicos: uma análise pragmático-discursiva de dissertações
… pretendido para defender o ponto de vista (PDV) do locutor, considerando ainda a sua responsabilidade e postura enunciativas perante o interlocutor. Ademais, afirmamos que tais produções acadêmicas são um reflexo do panorama sociocultural e histórico dos seus autores, os quais ainda …
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Student Perceptions of Soft Skills as an Indicator of Workplace Success
… reviewed journal submissions submitted in the PDV 105 Blueprint for Personal Success course. Findings of the study included all respondents indicating a positive perception of soft skills as an indicator of workplace success. Themes emerging from the study included respondents’ desire to …
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The effects of microstructure and nanostructure upon dynamic ductile fracture
… soft capture, photon Doppler velocimetry (PDV) and high-speed photography. A non-repeating pattern was marked on the rings and driver cylinders, enabling them to be reassembled and the precise location of the PDV measurement points known. Thus, information was obtained about velocity …
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Theory and modeling of laser-driven flyer plate experiments to study explosives under a microscope
… compared to experimental data for the incoming PDV velocity profiles and the downstream comparison of velocity profiles at 25 μm, 40 μm, 64 μm, 90 μm, and 170 μm downstream. We also present pressure, density, and temperature results. As part of this research, we developed a novel framework for …
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Refinement and Verification of the Virginia Tech Doppler Global Velocimeter (DGV)
Repairs and modifications were made to a flow velocity measurement system designed to measure a planar area of unsteady three component velocities in a single realization using a velocity measurement technique referred to as Doppler Global Velocimetry (DGV). Several hardware components in the …
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Subjetividade em tempos de reestruturação produtiva do trabalho bancário e programa de apoio à demissão voluntária
A presente dissertação discute o Programa de Apoio à Demissão Voluntária – PADV – como uma ferramenta central da gestão de pessoas, em tempos de reestruturação produtiva do trabalho bancário. Trata-se de um estudo de caso que contou com um total de cento e doze sujeitos, assim distribuídos: cento e …
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Statistical properties of Radio Halos and the re-acceleration model
… assume that during a merger a fraction of the PdV work done by the infalling subclusters in passing through the most massive one is injected in the form of magnetosonic waves. Then the processes of stochastic acceleration of the relativistic electrons by these waves and the properties of the …