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 91 for “"design improvements"”.
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Adaptable Design Improvements For Electromagnetic Shock Wave Lithotripters And Techniques For Controlling Cavitation
… (SWL) breaks stones in order to guide design improvements to a modern electromagnetic (EM) shock wave lithotripter. To accomplish this goal, experimental studies were carefully designed to isolate mechanisms of fragmentation, and models for wave propagation, fragmentation, and stone …
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Performance and design improvements toward the commercialization of a needle-free jet injector/
… Lorentz-force motor. While the current handheld design is effective as a research tool, many improvements are needed before it can be a commercially viable product for individual human use. Improvements in various aspects of the design have been implemented. A Hall effect sensor and a thermopile …
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Design improvements to the batch demulsification and sorption equipment for pesticide rinsate disposal
… and performed the tasks commensurate with its design, the original batch demulsification and sorption phase of the process had several operational problems. Namely, the system was large and not very portable, the recirculation system was not very reliable, and the entire step one process was …
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Affordable Fiber Extrusion Device for Educational Purposes: Design Improvements, Controls Development, and Manufacturing Scale-up
… the 2024 project objectives include refining the design, developing controls, scaling up manufacturing, designing the assembly line, managing inventory, creating educational content, and conducting user testing and pilot runs. This thesis specifically details the author’s contributions to …
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Design improvements of 12 slot-14 pole hybrid excitation flux switching motor with 1.0 kg permanent magnet for hybrid electric vehicles
… high-speed motor drive system. This project is a design improvements of 12 slot- 14 pole hybrid excitation flux switching machine (HEFSM) with 1.0 kg permanent magnet (PM) for hybrid electric vehicles(HEVs). The design target of maximum torque is 333Nm, a maximum power of more than 123kW, and a …
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Structural blast design
Blast design is a necessary part of design for more buildings in the United States. Blast design is no longer limited to underground shelters and sensitive military sites, buildings used by the general public daily must also have satisfactory blast protection. Integrating blast design into existing …
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Development of A Micro-Scale Impact Tester for Characterizing Dynamic Properties of Biological Structural Materials
This thesis presents the design and construction of a micro-scale, air powered, impact testing device for use in Virginia Tech's Biological and Bio-inspired Materials Laboratory. A brief overview of current projectile impact testers is presented along with motivation for the fabrication of a new …
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Turbulent Methane Oxygen CFD Thermal Effects on Rotating Detonation Engine
… Value, show the current radially injected mixing design and copper & stainless-steel material choice to provide enough thermal management benefits. The transient and steady state thermal benefits of radially staggered injected fuel and oxidizer was explored in detail as well as the heat flux …
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Improving Indian beehives and beekeeping
… mechanisms are quantitatively analyzed, yielding design improvements to improve accuracy. Second, designs of hive entrances are tested to promote traffic flow, assist ventilation, and exclude pests. Third, recommendations for Indian hive roofs and exteriors are given to keep hives cooler. Fourth, …
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Architectures and Design Automation for Photonic Networks On Chip
… distance traveled. In practice, physical-layer design and engineering issues such as optical loss, crosstalk, and packaging have slowed its entry into widespread adoption at the chip and board scale. In this work, we present these issues and potential design improvements. The major …
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An analysis of foot-ankle-leg fractures sustained by Warfighters and PMHS in the under-body blast environment
… Mitigating this subset of injuries through design improvements to vehicles and personal protective equipment (PPE) would have substantial preventative and mitigating effects that would benefit Warfighters and would reduce societal and military costs.
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Design and control optimization for high-speed jumping mode Atomic Force Microscope
In this thesis, I improved the design of a high-speed Atomic Force Microscope (AFM) for jumping mode operation. The relations between important imaging parameters and physical limitations of the system were established first to identify the aspects of improvement. Two control algorithms to improve …
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A precision autonomous parachute delivery system
… parachute jumper, a robotic parachute system was designed and flight tests were conducted to evaluate flight performance in deep brakes, for eventual use in autonomous accuracy landing approaches for targets two meters in size or smaller. Numerous design improvements were evaluated and/or …
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The Design and Evaluation of a High Frequency Fore-Aft Probe
… Laboratory at Virginia Tech. The probe was designed to detect surge and stall based on changes in large regions of flow behind a turbofan engine compressor fan. The probe exhibited excellent frequency response capabilities and can accurately measure data with response well above anticipated …
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A mixed-initiative framework for multi-agent human-robot teams
… control framework and proposes an initial design. The mixed-initiative framework was deployed onto a mobile robot, where three different agents could take, transfer, share, enable, or disable robot control. Compared to single-agent systems, the multi-agent mixed-initiative system completed …
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Theory and practice of supplier development for small and medium sized enterprises
… in terms of quality, cost reduction and design improvements. This dissertation reflects on the Cosalt experience and, taking into account the main management literature, attempts to establish a supplier development strategy for small/medium sized companies. It thus contributes to the …
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The phase separation inlet for droplets, ice residuals, and interstitial aerosols
… of separating distinct cloud particles. Future design improvements of SPIDER are suggested along with potential locations for field measurements.
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Design and Manufacturing of the Extrusion Assembly for an Advanced Process Control Educational Device
… for cost reduction. This thesis outlines the design and manufacturing of the extrusion assembly. The V-model methodology was adopted, and the functional requirements of the extrusion assembly were defined. Four iterations of prototyping were done. The prototypes were validated to see if they …
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Enabling energy efficiency for low-income housing in Developing countries using MIT Design Advisor
… housing is the lack of awareness regarding design choices and their associated externalities. Thus to enable better design decision-making, MIT Design Advisor, a rapid and simple building energy simulation tool, has been adapted to make the costs of poor housing energy efficiency more …
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A computational and experimental investigation into the performance of industrial refrigeration helical oil separators
… within the literature for droplet separation, design improvements have been suggested for the Henry Technologies separator. These include increasing the discharge flowrate through the no mesh separator, assessing a unit with a tangential inlet and compressed helix, designing a wire mesh …
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