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 27 for “"Stroboscopic"”.
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Stroboscopic Inline Coherent Imaging
… motion. To address this challenge, I use stroboscopic ICI, which is a technique that involves replacing the continuous-wave (CW) imaging source with an ultrafast pulsed light source to effectively "freeze" motion. I show that stroboscopic ICI can outperform CW-ICI by increasing successful …
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Deep Learning-Based Classification of Phonotraumatic Vocal Hyperfunction Severity from Stroboscopic Images
… for automatically detecting PVH severity from stroboscopic images. One of the main challenges in building deep learning models for this task is a lack of labeled stroboscopy data. Motivated by this challenge, we explore two approaches: direct classification and segmentation-then-classification. …
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Improving visibility of latent stains on dark fabric: dark adaptation and stroboscopic light sources
When an item is submitted to a crime laboratory, the first step in analysis is to examine the item under white light. The next step in examination often involves the use of alternate light sources (ALS) to search for potential biological evidence. Dark adaptation has been suggested as a method to …
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Using time-lapse and stroboscopic photography to enhance student understanding of plant growth, structure, and pollination: an inquiry-based study
… involved in the taking of still, time-lapse, and stroboscopic images throughout the study. Although an analysis of the quantitative data showed a significant increase in the test scores for both the control and treatment groups but no significant difference when they were compared to each other, …
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Mitigated Motion-Induced Signal Loss and Enabled Refractive Index Measurement in Optical Coherence Tomography
… in the form of a temporally pulsed ‘stroboscopic’ light source. Compared to standard OCT, which uses a time-independent source, stroboscopic OCT can mitigate motion-induced signal loss. For this reason, a stroboscopic light source was created. By comparing signal retention during …
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Ultracold Atoms in a Disordered Optical Lattice
… major technical components needed to implement a stroboscopic quantum simulation scheme were constructed and a number of calculations were performed.
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Mobilização rápida de citocromo-oxidase por estimulação sensorial em córtex visual de gatos e primatas
… distinct phases. The monocular stimulation by stroboscopic light shows ocular dominance columns in monkey's Vl after thirty minutes. The cytochrome oxidase fast mobilization phenomena may be the product of the immediate activation of one or more genes of the enzyme' s subunits, of allosteric …
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Real-time non-intrusive reed valve measurement and analysis
… back to back evaluation with a recognised video stroboscopic method ofreed position measurement during stable operating conditions, during which not only was its own integrity established, but also the limitations of the currently recognised method demonstrated. A set of comparative experiments …
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Dynamic environmental transmission electron microscopy of spin crossover materials
… This is accomplished by a variety of stroboscopic and fast camera methods. The work detailed here includes the integration of UV photoexcitation, development of low-dose methodologies, and details regarding the pump delivery system of the DTEM setup.
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Impact of human vocal fold vibratory asymmetries on acoustic characteristics of sustained vowel phonation
… that were not possible using clinical stroboscopic imaging systems. In an initial study of asymmetric vibration in 14 patients treated for laryngeal cancer, perturbations in the voice signal were most associated with asymmetry that changed across vibratory cycles, while the overall …
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The Interactions of Hot Spheres and Volatile Liquids
… a short distance below the water surface. By stroboscopic illumination photography tracks of these drops were observed and quantitative information on the dynamics of the interaction obtained. obtained.
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Dynamic environmental transmission electron microscopy
… materials can be imaged and recorded with either stroboscopic or single-shot movie-mode methods. To develop the DETEM the Hitachi H-9500 300 kV TEM installed at the Frederick Seitz Materials Research Laboratory, has been modified to accommodate the optics to allow various pump-probe methods to …
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Quantum dynamics in laser–assisted collisions, laser–molecule interactions, and particle–surface scattering
… helicity. In a pump – control – probe scheme, “stroboscopic” exposure of a nuclear wave packet of the deuterium molecular ion by a single or a series of short and intense laser control pulses may be used to produce an almost stationary distribution of a single vibrational level, where the nodal …
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Measurements and models of electrically-evoked motion in the gerbil organ of Corti
… specific phases within the stimulus period using stroboscopic video microscopy. Animations of this motion were created, and the displacement magnitude and phase for each structure were calculated using two dimensional cross-correlation. With these techniques we were able to detect displacements as …
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Physical Conditions and Chemical Processes During Single-Bubble Sonoluminescence
… and energy-transfer reactions. Simultaneous stroboscopic and spectroscopic studies of SBSL in H2SO4 containing alkali-metal sulfates showed that dramatic changes in the bubble dynamics correlated with the onset of emission from nonvolatile species such as Na and K atoms. These effects were …
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Theoretical modeling of pilot-wave hydrodynamics
… to describe this system. We begin with the stroboscopic model of Oza et al. (2013), and elucidate the role of spatial wave-damping and the effect of the droplet's vertical dynamics. We then extend the boost model of Bush et al. (2014), valid in the weak-acceleration limit, demonstrating its …
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A laboratory investigation of raindrop oscillations
… using a computer-controlled drop generator, and stroboscopic photographs of the drops a distance below the generator yielded instantaneous axis ratios. Measurements of the oscillation frequency for 2.0 and 2.5 mm drops were made from photographs of interruptions in the backscattered light of the …
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Floquet theory of electronic stopping processes of projectiles in solids
… therefore very computationally expensive. The (stroboscopic) stationary solutions of the stopping problem are found using a Bloch-Floquet scattering treatment. The expressions for electronic stopping of previous perturbative and nonlinear models are readily recovered from the theory in the …
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Ponderomotive Forces in Pilot-Wave Hydrodynamics
… coincident with extrema of the cavity eigenmode. Stroboscopic models that idealize the drop’s bouncing dynamics as being perfectly resonant with their Faraday wave field have proven incapable of capturing the emergent statistics. In this thesis, we present new experimental and theoretical findings …
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Non-structural Deterrents and Opportunistic Dispersal in an Invasive Fish: The Role of Among-Individual Variation on Common Carp Movement
… required to force movement towards acoustic and stroboscopic stimuli varied across individuals. In chapter 3, these same deterrents were deployed at an outdoor fishway with more realistic field conditions. Native and non-native fish passage across the fishway was quantified to determine whether a …
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