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 471 for “"seal"”.
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The Divided Seal
This thesis looks at the function of signatures in visual art using the theory of Jacques Derrida and a series of paradigmatic historical examples. Specifically, it departs from ‘Signature Event Context’ (SEC) to establish signature outside the idiom of visual art as a social process. Having …
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Navy SEAL Prosthetic Hand
… left hand prosthesis for an active duty Navy SEAL and the transition from electronic controls to full body power function.</p>
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Patterns in Seal Iconography: A Frequency Model
… explore iconography displayed on flat and roller seals manufactured during the Preclassic era in five Maya regions in Mexico, Guatemala, Belize, El Salvador and Honduras as well as two collections of seals of the same age from Ecuador and Peru. I gathered a corpus of images and established 21 …
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Thermally actuated MEMS seal for vacuum applications
… and testing of a new, leak-free, permanently sealable MEMS valve for use in vacuum applications. This device is different from existing MEMS valves in that it is leak-free in the closed state and has a relatively high flow rate in the open state. This device relies on the surface tension of a …
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Management of seal tourism in New Zealand – tourism and the New Zealand fur seal in the Bay of Plenty
Pinniped (seal, sea lion and walrus) tourism is an expanding industry, popularized due to the playful and interactive nature of seals. The industry can have positive outcomes for pinnipeds, through education and the promotion of conservation issues, or negative outcomes, such as causing the animals …
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Passive wake detection using seal whisker-inspired sensing
… biological experiments, which display the harbor seal's ability to track the wake of an object several seconds after it swam by. In this work, I elucidate the basic fluid mechanisms that seals may employ to accomplish this detection. Key are the unique vortex-induced vibration (VIV) properties …
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Passive wake detection using seal whisker-inspired sensing
… biological experiments that display the harbor seal's extraordinary ability to track the wake of an object several seconds after it has swum by. They do so despite having auditory and visual cues blocked, pointing to use of their whiskers as sensors of minute water movements. In this work, I …
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PACTIGHT: Tightly Seal Sensitive Pointers with Pointer Authentication
… pointers. We propose PACTight to tightly seal these pointers from attacks targeting Pointer Authentication itself as well as from control-flow hijacks. PACTight utilizes a strong and unique modifier that addresses the current issues with PAC and its implementations. We implement four …
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Innovative Heat Transfer Augmentation Techniques in Mechanical Face Seal
Excessive heat generated at the face seal contact interface has been recognized as one of main causes of failure of mechanical seals. In the past few decades various efforts have been attempted to remove heat from the contact interface uniformly in order to reduce the interfacial temperature, …
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Improvement of Labyrinth Seal Leakage Rates Using Additive Manufacturing
… manufacturing to develop better labyrinth seals in turbomachinery. Labyrinth seals have a torturous fluid path with high losses, thus limiting the amount of fluid leakage. These types of seals can be non-rotating, allowing them to better take advantage of the additive manufacturing process …
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The effects of soil abrasives on rotary seal effectiveness
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Seal Development and Infiltration as Affected by Rainfall Kinetic Energy
… large affect that the development of a surface seal has had on the resulting infiltration measurement of a soil. This surface seal may be more significant in determining the infiltration characteristics of a soil than any other single or perhaps combination of factors. Surface seal development …
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The Illinois State Seal of Biliteracy: A Policy Advocacy Document
… district's participation in the Illinois State Seal of Biliteracy Program, which became law in August, 2013. This program places value on developing bilingual or multilingual citizens. Through the demonstration of proficiency in English and one or more foreign languages, students can earn the …
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Modeling, estimation and control of mechanical gas face seal systems
… existing methods to study mechanical gas face seals are computationally intensive or have limitations due to linearized description of the gas film coefficients. This dissertation develops modeling, estimation and control methods for mechanical gas face seal systems that overcome the …
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