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 7 of 7 for “"sampling artifacts"”.
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Four-Dimensional Imaging of Respiratory Motion in the Radiotherapy Treatment Room Using a Gantry Mounted Flat Panel Imaging Device
… by high doses, long scan times and severe under-sampling artifacts. The focus of the work completed in this thesis was to find ways to improve 4D imaging using a gantry mounted 2D kV imaging system. Specifically, the goals were to investigate methods for minimizing imaging dose and scan time …
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Inorganic and organic speciation of atmospheric aerosols by ion chromatography and aerosol chemical mass closure
… them with total element data; (4) to examine the sampling artifacts for inorganic and organic species on quartz fibre filters; and (5) to perform aerosol chemical mass closure. SO42- and NH4+ were predominantly present in the fine and NO3- in the coarse size fraction at all sites. At most sites …
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Improvements In Four-Dimensional and Dual Energy Computed to mography
… respiratory monitoring and reduce clinical 4D CT artifacts. Several clinical data driven 4D CBCT methods were modified for mice. Errors in projection sorting were within 4% of a breathing phase and were statistically less than the previous method for data driven 4D CBCT in mice. In clinical 4D CT, …
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Development of improved sampling and analysis methods for measuring organic, elemental, and water-soluble organic carbon in atmospheric aerosols and application to aerosol studies in Europe and tropical/equatorial and oceanic regions
… for carbonaceous aerosols, whereby the sampling artifacts are better controlled or can be corrected for; (3) to perform detailed carbonaceous aerosol characterisation studies in Belgium and at urban and forested sites throughout Europe and (4) in the Brazilian Amazon basin, the tropical …
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Applications of Thermal and Laser-Based Methods for Monitoring Airborne Particulates in Coal Mines
… coal-sourced EC, there could be some sampling artifacts associated with its operation in coal mines, which may inhibit its effectiveness.
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Droplet and Particle Dynamics in Aerosol Reactors and Environmental System
… to improve the accuracy of indoor aerosols sampling instruments for accurate assessment of the health impacts of these aerosols. Many potentially harmful indoor aerosols such as viruses (including the SARS-COV-2 virus) and protein fragments lie in the nanometer size ranges, and it is …
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Assessing Movement of Fish Through Spectral Analysis of Otolith Life History Scans
… structure of otoliths could produce sampling artifacts in the results of laser ablation scans. To test this hypothesis, I ablated two trenches of different depths on each otolith, performing spectral analyses on these data to investigate the effects of ablation depth, including …