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 142 for “"Harsh Environments"”.
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Living in harsh environments: From individuals to social networks
Animals living in harsh environments are regularly faced with high-risk situations. For example, small-bodied, diurnal endotherms are challenged with high starvation risk in winter conditions when frequent storms and limited daylight restrict opportunities to forage freely. Available food may be …
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Magnetic Switches as Active Device Replacements for Harsh Environments
This thesis explores the use of the archetypical pulsed power magnetic switching devices in alternative and novel methods. The primary motivator for investigating these applications are for the purpose of simplifying electrohydraulic drill and electrocrushing designs meant for extreme environment …
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Collaborative Position Location for Wireless Networks in Harsh Environments
… in the past several years, position location in harsh propagation environments remains to be a challenging issue, due mainly to the lack of sufficient infrastructure support and the prominent phenomenon of non-line-of-sight (NLOS) signal propagation. Recently, adopting the concept of …
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Miniature Fiber-Optic Sensors for High-Temperature Harsh Environments
Measurement of physical parameters in harsh environments (high pressure, high temperature, highly corrosive, high electromagnetic interference) is often desired in a variety of areas, such as aerospace, automobile, energy, military systems, and industrial processes. Pressure and temperature are …
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Inkjet printing of resistive-type humidity sensor for harsh environments
A flexible resistive-type humidity sensor for harsh environments is successfully designed and fabricated by an inkjet printing method using a Dimatix materials printer (DMP-2800 series from Fujifilm). Construction of the sensors is based on inkjet printed interdigitated silver electrodes on a …
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Unmixing algorithms and materials for radiation detection in harsh environments
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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Fiber-Optics Based Pressure and Temperature Sensors for Harsh Environments
… accurate temperature and pressure profiles in harsh environments is currently in high demand in aerospace gas turbine engines and nuclear reactor simulators. Having the ability to measure both quantities continuously over a region, without thermal coupling, using a sensor with a small size …
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Novel Optical Sensors for High Temperature Measurement in Harsh Environments
… processes. Many of these processes involve harsh environments, such as high temperature, high pressure, chemical corrosion, toxicity, strong electromagnetic interference, and high-energy radiation exposure. These extreme physical conditions often prevent conventional temperature sensors from …
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Diode Laser Spectroscopy for Measurements of Gas Parameters in Harsh Environments
… for making self-calibrated measurements in harsh environments due to its improved sensitivity and noise rejection capability compared to direct absorption detection. But, the complexity in signal processing and higher scope of error (when certain restrictions on operating conditions are not …
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Magnetic Communication in Harsh Environments Employing High-Sensitive Wideband Magnetic Field Sensors
… and efficient data transmission in challenging environments such as water. In this approach, the receiver coil of a conventional magnetic induction communication system is replaced by a high-sensitivity, low-noise, wideband magnetic field sensor. These sensors offer increased bandwidth and, at …
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Low Interfacial Tension Foam Miscible Ethane Oil Recovery in Low Permeability Harsh Environments
… oil recovery in low permeability, heterogeneous, harsh environments (<15md, 136,000ppm total dissolved solids with divalent ions, 74°C). Minimum miscibility pressure displacement tests were performed for dead crude oil from the Wolfcamp Spraberry trend area using ethane and carbon dioxide, showing …
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Phase field model to study the corrosion of structural alloys in the harsh environments
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-20 without embargo terms
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Wheeled autonomous mobile robots for use in harsh environments: a survey of recent publications
… of wheeled autonomous mobile robots for harsh environments. Various sensing, navigation, and motion control strategies commonly used on autonomous mobile robots are compared. The integration of all three systems in a system architecture is also presented. Following a general discussion of …
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Thermoelectric Energy Harvesting in Harsh Environments and Laser Additive Manufacturing for Thermoelectric and Electromagnetic Materials
… challenges in sensor powering for extreme environments, energy harvesting, and materials fabrication. The research is divided into three key areas, each contributing to advancements in its respective domain. First, a self-powered wireless through-wall data communication system was developed …
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Sapphire optical fiber sensors
… of silica. Temperatures above 700°C and other harsh environments are incompatible with standard optical fiber sensors. Sapphire fiber sensors offer another option for fiber optic sensing. Sapphire fibers are limited by the material properties of sapphire, which include high melting point, …
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The synthesis of stable nanotags for the detection of biomolecules using surface enhanced Raman scattering
… difficult to isolate and unable to stand harsh environments. An important area of this research involves using metal nanoparticles as artificial enzymes, known as nanozymes, which exhibit peroxidase-like activity enabling them to catalyse the oxidation of substrates such as …
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Habitat-specific fitness benefits of sociality in Octodon degus
… cooperation enhance reproductive success under harsh local conditions in some species. Across two years, I studied two populations of Octodon degus, a plurally breeding rodent, to answer three questions: (1) Does living in large groups and having strong social network strength improve access to …
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Inversion of Light Scattering Measurements for Particle Size and Optical Constants
… techniques can be used unobtrusively in harsh environments, so the development and improvement of these techniques is of great interest. The primary difficulty associated with light scattering techniques is inverting the data or obtaining the desired information from the measurements.
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Pulsed laser ablation and micromachining of 4H and 6H SiC wafers for high-temperature MEMS sensors
… of these devices capable of operating in harsh environments.</p>
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