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.
Results
Showing 1 to 20 of 120 for “"moving parts"”.
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The Development of A Spatial Heterodyne Spectrometer For Raman Spectroscopy
… capable instruments with minimal or no moving parts that can be used to analyze minerals and detect organic molecules and biomarkers on other planets. Raman spectroscopy is an ideal technique for this application and a standoff instrument would allow measurements to be made at a much …
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Development of a motion-free tomographic imaging system
… weight and cheaper, and to operate without any moving parts. This could expand access to this valuable diagnostic tool to rural and low-income communities, emergency medicine, battlefield care, and extended space missions. As part of this system, we present a photo-cathode-based x-ray source, …
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Design and construction of a thyratron stroboscope
… operation, compactness, portability, absence of moving parts, and low cost.
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Energy conversion using thermal transpiration : optimization of a Knudsen compressor
Knudsen compressors are devices without any moving parts that use the nanoscale phenomenon of thermal transpiration to pump or compress a gas. Thermal transpiration takes place when a gas is in contact with a solid boundary along which a temperature gradient exists. If the characteristic length …
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Theoretical and experimental analysis of the thermoacoustic refrigeration
… be described. It will be seen that without any moving parts, except the driver (speaker diaphragm), this refrigerator is as efficient as other refrigeration systems. An experiment is designed with all the major parts manufactured and fabricated in the lab. The results of the experiments are …
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Three-dimensional modeling of sealing and wear of XTS-210 engine Apex seals
… advantages such as high power density and fewer moving parts. However, traditional rotary engines such as the Wankel have drawbacks such as excessive seal wear, combustion gas leaks and limited durability. LiquidPiston’s X-Engine features an innovative geometry designed to solve these problems, …
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From Self-Doubt To Inner Peace: An Ethnographic Narrative
… of taking an introspective look at the many moving parts of becoming an effective educator as well as developing an ethnographic view of the students who will pass through my classroom during my tenure as an educator. This ethnographic narrative examines my individual background, the …
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Investigation of the behavior of continuous beams under steady state forced vibration
… higher. Although the weight of the shaker's moving parts was less than one-tenth the weight of the beam it had considerable effect in lowing the resonant frequency and increasing amplitudes.
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TRANS, A study of motion and geometry
… optimization. This book is concerned with such moving parts.
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Phase derivative microscopy of biological cells and tissues
… stability because there are no mechanically moving parts involved in the operation. More importantly, unlike DIC, PDM does not use polarizing optics and, thus, it is applicable to birefringent samples. Furthermore, because it is a single-shot technique, PDM allows acquisition speed as fast as …
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Experimental Investigation and Modeling of Scale Effects in Micro Jet Pumps
… injectors. These components pump fluids with no moving parts and can be integrated into Power MEMS devices to satisfy pumping requirements by supplementing or replacing existing solutions. This thesis presents models developed from first principles which predict losses experienced at small length …
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Sample-efficient reinforcement learning
… understand the mechanics of the different moving parts in the problem and on the basis of the insights obtained from the theory, design principled practical algorithms/heuristics that are sample-efficient.
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Biocompatibility of an implantable ophthalmic drug delivery device
… bearing were designed to mimic elements of its moving parts, geometry and materials. Cell culture studies identified a polytetrafluoroethylene filter with 100m pores as a promising addition to seal devices from interaction with fibroblasts. Test devices with or without this membrane were …
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Subsystem development and flight testing of an electroaerodynamic UAV
… thrust generation with no direct emissions, no moving parts, and is nearly silent. Previous work has quantified the thrust-to-power and thrust density of EAD propulsion. An unmanned aerial vehicle (UAV) was designed with the optimization tool GPkit and with the flight mission goal of …
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Analysis of novel flexure-based joint
… actuated mechanisms get smaller, so must their moving parts. A novel flexure-based joint was developed for Squishbot1 by a team at MIT, which can be made small (sub-cm), or much larger. Here, pseudo-rigid-body modeling is used in conjunction with the geometry of the joint mechanism in order to …
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Design of a frameless torque motor
… motors to compensate for friction loss in the moving parts. Since the space available for these motors is limited, the motor designer must obtain a design which will supply maximum torque for the available power input. The designer must determine the optimum rotor outside diameter, magnet size, …
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Optimization of Human Interactions in the College Campus Model Via Simio Integration
… Dive Model of the campus, which identifies more moving parts and student/worker interactions. Once the models were generated, they were analyzed, optimized, and shown to university stakeholders for feedback on the results. As an outcome, a more optimized campus model was obtained for ERAU-DB.</p>
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Exploring the Performance of Active Thermal Tiles for Space Applications
… component. Because ATTs do not rely on fluids or moving parts, they are highly reliable devices which make them attractive for use in spacecraft. An ATT experimental ground unit was tested in a vacuum chamber under 88 different conditions over a temperature range of 280K to 310K. The power …
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Fault detection in rotating machines by vibration signal processing techniques
Machines with moving parts give rise to vibrations and consequently noise. The setting up and the status of each machine yield to a peculiar vibration signature. Therefore, a change in the vibration signature, due to a change in the machine state, can be used to detect incipient defects before they …
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