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 110 for “"High-Speed Imaging"”.
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High speed imaging of transient non-Newtonian fluid phenomena
In this thesis, I investigate the utility of high speed imaging for gaining scientific insight into the nature of short-duration transient fluid phenomena, specifically applied to the Kaye effect. The Kaye effect, noted by A. Kaye in the March 9, 1963 issue of Nature, is the deflection and rebound …
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Miniature, high-speed imaging transform spectrometers and advanced sampling algorithms
… thesis describes the development of miniature imaging Fourier transform spectrometers and irregular sampling techniques. An imaging spectrometer is a device that takes a series of images that include information from a variety of wavelengths of light at high spectral resolutions. When this …
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High-speed imaging and analysis of the solidification of undercooled alloy melts
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Thermal and physical structures of high explosive fireballs through optical thermometry and high-speed imaging
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Experimental hydrodynamics of spherical projectiles impacting on a free surface using high speed imaging techniques
… by Touvia Miloh [12]. A critical impact speed for splash formation was determined before which no splash cavity would form. The cone angle formed behind an impacting object was also studied. The cone angle was found to be a function of depth and impact speed over the range of impact …
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Impact of matrix modification on concrete fracture: Insights from mechanical testing and in-situ high speed imaging
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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A reproducible and low-cost piezoelectric droplet generator
… droplet generator capable of producing highly repeatable droplets ranging from 0.60 mm to 1.60 mm in diameter. The generator is low cost, simple to fabricate, and easily reproducible for use in other fluids experiments. A series of experiments were conducted to investigate the effects of …
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The Software and Hardware Acceleration for Interior Tomography
The x-ray CT is with high spatial resolution, temporal resolutions, and high-speed imaging characteristic. The iterative reconstruction algorithms are becoming more important since they can reconstruct better image qualities from incomplete projection data compared to analytical reconstruction …
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Failure of Microelectromechanical Systems Under Dynamic Loading: An Experimental and Numerical Investigation
… tests) in an attempt to predict failure. High-speed imaging was also used to capture the first real-time images of MEMS structures responding to dynamic loading.
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A modular atomic force microscope for nanotechnology research
… can be reconfigured for fundamentally different imaging tasks and can be used as a platform for continued research efforts. The optical beam deflection (OBD) setup can be configured for coaxial or off-axis detection for use with cantilevers of any size. A simple and low-cost design is presented, …
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Transport-limited aggregation and dense granular flow
… inside silos and hoppers is investigated using high-speed imaging and the results are compared to existing theories. While mean velocity fields are in qualitative agreement, the diffusion and mixing of particles are contradictory to the microscopic assumptions. A new model for dense granular …
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On advancement of high speed atomic force microscope technology
High speed atomic force microscopy (AFM) is a developing process in which nanoscale objects, such as crystal structures or strands of DNA, can be imaged at rates fast enough to watch processes as they occur. Although current generation AFM is already pivotal in many fields of research and industry, …
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Resin percolation and intimate contact in fast processing of thermoplastic composites
… This study showed through cross-sectional imaging and scaling analysis that percolation flow, rather than squeeze flow, of resin through fibers is the dominant mechanism to achieve intimate contact in rapid TPC processes such as automated fiber placement (AFP) and welding. A 1D intimate …
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Mechanotransduction via airway epithelial cells : the effect of compressive stress
… pathway. Furthermore, specialized real-time high-speed imaging revealed an exponential decrease in the volume of the compliant lateral intercellular space (LIS) separating neighboring cells. The measured LIS volume collapse curves were directly inputted into 2-D and 3-D numerical finite …
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Dynamics of Rigid Fibers in a Planar Converging Channel
… state of a dilute suspension of stiff fibers at high Reynolds number in a planar contraction is investigated. High speed imaging and LDV techniques are used to quantify fiber orientation distribution and turbulent characteristics. A nearly homogenous, isotropic grid generated turbulent flow is …
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Nucleation Dynamics for Water Condensation on Hydrophobic Surfaces in the Presence of Non-Condensable Gases
… gases in a custom-built condensation chamber. High-speed imaging and high-resolution microscopy enabled the experimental quantification of condensation dynamics. These were then compared to theoretical values based on the classical nucleation density. Based on the present experiments and a size …
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Improvements to the electrohydrodynamic jet printing process
… accurately captures features observed through high-speed imaging. This model is simple and flexible enough to be useful for variety of applications. The contributions presented in this thesis are intended to advance E-jet technology for both academic and commercial use.
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Effect of 3D Architecture on Energy Dissipation during High-speed Particle Impact
… to (spatially confined) planetary impact. Ultra high-speed imaging and post-impact scanning electron microscopy reveal qualitative differences in the energy dissipation mechanisms present between impacts on architected and bulk materials. Additional uniaxial compression experiments on equivalent …
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