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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 43 for “"in-situ characterization"”.
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Abrasive Blasting with Post-Process and In-Situ Characterization
Abrasive blasting is a common process for cleaning or roughening the surface of a material prior to the application of a coating. Although the process has been in practice for over 100 years, the lack of a comprehensive understanding of the complex interactions that exist with the process can still …
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In-situ Characterization and Machine Learning Applications for Composite Processing
… aircraft and spacecrafts utilize carbon fiber-reinforced polymer structures to significantly enhance their operational efficiency and overall performance. Autoclave composite processing offers a solution for the intricate design of complex structures. However, the rapid temperature and strain …
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In Situ Characterization of Optical Absorption by Carbonaceous Aerosols: Calibration and Measurement
… classification techniques represents an in situ method that can quantify the light absorption by aerosols in a real time, yet significant differences have been reported using this method versus filter based methods or the so-called difference method based upon light extinction and light …
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Direct 3D and in situ characterization of light metal hydrides for hydrogen storage
… as their environmental impact have generated interest in hydrogen as a sustainable energy carrier. Developing effective hydrogen storage for automotive applications is a central challenge in realizing a hydrogen energy economy. Light metal hydrides possess high storage capacities, but sluggish …
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Towards basin-scale in-situ characterization of sea-ice using an Autonomous Underwater Glider
… Underwater Glider (AUG) architecture that is intended for basin-scale unattended survey of Arctic sea-ice. The distinguishing challenge for AUG operations in the Arctic environment is the presence of year-round sea-ice cover which prevents vehicle surfacing for localization updates and …
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In-situ characterization of sea state with improved navigation on an Autonomous Underwater Glider
… onboard navigation and acoustics-based sensing intended to enable basin-scale unattended surveys of our Earth’s most remote oceans. Traditional AUGs have long-been an important platform for oceanographic surveys due to their high endurance and autonomy, yet lack the operational flexibility …
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Development Of Silicon-Based Anodes And In-Situ Characterization Techniques For Lithium Ion Batteries
… (LIBs) with higher capacity has been booming worldwide, as growing concerns about environmental issues and increasing petroleum costs. The demands for the LIBs include high energy and power densities, and better cyclic stability in order to meet a wide range of applications, such as …
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In-situ Characterization of Sea State with Improved Navigation on an Autonomous Underwater Glider
… onboard navigation and acoustics-based sensing intended to enable basin-scale unattended surveys of our Earth's most remote oceans. Traditional AUGs have long-been an important platform for oceanographic surveys due to their high endurance and autonomy, yet lack the operational flexibility …
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DEVELOPMENT AND IN-SITU CHARACTERIZATION OF BI-LAYERED LAMINATED COMPOSITES FOR ENHANCED MOISTURE BARRIER PERFORMANCE
Silicone encapsulations are widely used in high-temperature electronic applications, providing excellent properties like thermal stability, high purity, and chemical resistance. However, silicone is susceptible to moisture-induced failures due to high moisture permeability. This study mainly …
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Formation of RDX nanoparticles by rapid expansion of supercritical solution : in situ characterization by laser scattering
Cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), a well-known energetic material, is highly explosive. Reduction of the sensitivity of RDX is desired for safe handling and storage in military applications. Data on the sensitivity of RDX in the 10-1000 um crystal size range suggested that the …
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In situ characterization and quantification of phytoremediation removal mechanisms for naphthalene at a creosote-contaminated site
… technology due to its relative low cost and maintenance requirement. Acceptance of phytoremediation requires that the contaminant removal mechanisms are characterized and demonstrated in the field. Quantification of contributions from each mechanism to the overall remediation rate is crucial …
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Studying the kinetics and mechanism of the formation and degradation of electrocatalysts using in situ characterization techniques
The world relies heavily on fossil fuels including coal, oil, and natural gas for its energy. As a non-renewable resource, fossil fuels are the main sources for the production of carbon dioxide and will become more expensive as the supplies diminish. As the demand in energy rises (by 70% by 2040 …
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In situ characterization of sediment oxygen demand across the spectrum of non-resuspension to full resuspension with varying bed shear stress
… oxygen demand (SOD) can be a significant oxygen sink in various types of water bodies, particularly slow-moving waters with substantial organic sediment accumulation. In most settings where SOD is a concern, the prevailing hydraulic conditions are such that the impact of sediment resuspension on …
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Multiscale In-Situ Characterization of Crystal Orientation, Temperature, and Microstructure Effects on Creep Defromation of Pure Magnesium and Mg-Al-RE Alloys
… valued for their high strength-to-weight ratios in automotive and aerospace applications. Their broader use is restricted by limited creep resistance and pronounced anisotropy of plastic deformation, especially at elevated temperatures. This thesis examines how crystal orientation, temperature, …
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Sources of Quality Uncertainty in Laser Powder Bed Fusion Metal Additive Manufacturing
<p>"Powder based additive manufacturing (AM) exhibits tremendous uncertainties, where variations in build quality is present despite utilizing similar build processing parameters. First, this work reports the features and formation mechanisms of five unique types of spatter during the LPBF process …
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Instrumentation and Control of a Novel Device to Simulate a Hypersonic Environment
… flow regime poses several challenges regarding the design of hypersonic vehicles. Among them is the massive energy and economic expense associated with ground- testing evaluation of material responses within this extreme environment. In order to provide a low-cost, rapid option for …
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Chemical, mechanical, and thermal control of substrate-bound carbon nanotube growth
Carbon nanotubes (CNTs) are long molecules having exceptional properties, including several times the strength of steel piano wire at one fourth the density, at least five times the thermal conductivity of pure copper, and high electrical conductivity and current-carrying capacity. This thesis …
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Principles of Laser Alignment in Atomic Force Microscopy and its Potential Application for Nanoscale 3D Printing
… technique that has played a significant role in the characterization of nanoscale structures. While its applications in surface profiling and imaging of nanomaterials are widely recognized, the potential of AFM techniques in 3D printing applications has not been fully explored. In this thesis, …
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Studio preliminare per la valutazione della fattibilità di un progetto di CO2-ECBM nel bacino carbonifero del Sulcis
… alternative to reduce greenhouse gases release into atmosphere. Correct identification of the location for a suitable reservoir is a complex decisional process because it must consider a great number of criteria mainly concerning environmental, geological and economical aspects. The variety and …
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Multiscale development of electrochemical separations: from molecular design of redox-moieties to interfacial characterization and process simulation
Pressing separations challenges, such as the recovery of critical materials from low-grade sources, the environmental remediation of trace pollutants from water, and the improvement of downstream separations in chemical manufacturing, highlight the need for novel approaches with lower energy …
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