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 44 for “"surface contamination"”.
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Estimation of Real-Time Runway Surface Contamination Using Flight Data Recorder Parameters
… landing tests had to be simulated on different surfaces. The simulated aircraft model includes a high fidelity aerodynamic model, thrust model, landing gear model, friction model and antiskid model. Three main surfaces were defined in the friction model; dry, wet and snow/ice. Only the …
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Droplet growth kinetics on superhydrophobic surfaces and future work on combating cryogenic surface contamination
… sweep away other droplets on an inclined surface. Droplet growth rates on a given surface primarily depend on background vapor pressure and the extent of wall subcooling. Here, I report that larger droplets affect the growth rates of nearby smaller droplets during dropwise condensation on …
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Effectiveness of a closed system device in reducing occupational exposure and environmental concentrations of anticancer drugs
… Hospital, Plymouth, to investigate the extent of contamination with anti-cancer drugs on work surfaces and the environmental emissions of these drugs. In the Isolator study, surface contamination arising from the preparation of five anticancer drug infusions (epirubicin, fluorouracil, cisplatin, …
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Experimental and numerical investigation of the flow structures at the rear of three-dimensional bluff bodies
… have complex structures, which create drag, surface contamination and stability issues for transportation systems. The standard Ahmed body (SAB) is a simplified representative three-dimensional (3D) bluff body that is known to produce the essential features of complex bluff bodies. This …
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Monitoring of occupational exposure to antineoplastic drugs
… drugs. Methods for determination of surface contamination and air sampling, both as vapour and particulates, were developed and validated. Furthermore, methods for determination of antineoplastic drugs in urine and plasma were developed and validated. Analysis was performed by liquid …
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Evaluating Flight Crew Decision-Making Through Part 121 Taxi Operations
… based on taxiway intersection angle and surface contamination. Additionally, this study explored whether there was a way to connect ASRS and ADS-B.</p> <p>Eighty-eight flights were split into four different groups based on their taxiway intersection angle and the surface conditions during …
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Investigations of Pile Foundations in Brownfields
"Brownfields" are real estate property with subsurface or surface contamination. The redevelopment of Brownfields is required to clean, improve and protect the environment. Piles foundations are often used in Brownfields to support structures. Regulators are concerned about the environmental safety …
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Identification of changes in the surface of textiles subjected to plasma chemical treatment using attenuated total reflectance-fourier transform infrared spectroscopy
… It is believed that reactions only occur at the surface of the treated samples. Therefore, we have used Fourier transform infrared spectroscopy with attenuated total reflectance sampling (ATR-FTIR) to examine changes in the chemical nature of the surface of representative modern and …
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Angle Resolved Photoemission Study of Epitaxial Chromium Dioxide Films
… oxide. The electronic properties of the surface region of CrO2 have been studied by performing angle-resolved ultra-violet photoelectron spectroscopy (ARUPS) measurements on epitaxial CrO2 films. The CrO2 thin films were deposited on (100) and (110) – oriented TiO2 substrates by chemical …
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Feasibility study of surface applications for Flashblast[TM] radiation in the food industry
… industry to eliminate or significantly reduce surface contamination. FLASHBLAST™ is the trademark of a pulsed power electromagnetic radiation apparatus developed by Maxwell Laboratories, Inc., San Diego, CA. A FLASHBLAST™ transforms electrical energy into high intensity, short duration pulses …
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Thermoelectric and electrical transport properties of Bi2Te3 compacted nanoparticles bulk material
… (3D) topological insulators (TI) host surface carriers with extremely high mobility. However, their transport properties are typically dominated by bulk carriers that outnumber the surface carriers by orders of magnitude. We herein present a strategy to overcome the problem of bulk …
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Chemical Vapor Etching of Copper Using Oxygen and Various Beta-Diketones
… 50 Torr of hexafluoropentanedione. The degree of surface contamination was found to be a functions of the O2/hfacH ratio and temperature. At low O2/hfacH ratios the etching took place cleanly while high O2/hfacH ratios produced a thick oxide film The activation energy for etching at high …
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Selective Deuteron Acceleration using Target Normal Sheath Acceleration
It has been known for more than a decade that surface contaminants from a thin foil will be accelerated to multi-MeV energies after irradiation with an ultra-intense laser. The versatility of an ion beam for the generation of neutrons can be improved by tailoring which ions are accelerated. …
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Identification and Reduction of the Alpha Background, From 238U and 232Th Decay Chains, in the DEAP-3600 Experiment.
… sanding robot, aimed at reducing radiogenic surface contamination, which removed 506$\pm$50 $\mu$m of acrylic from the inner-most portion of the detector surface. Furthermore, different analysis tools were developed and used during different phases of the experiment to measure the remaining …
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IN SITU PLASMA REMOVAL OF SURFACE CONTAMINANTS FROM ION TRAP ELECTRODES
… an in situ plasma discharge designed to remove surface contaminants from electrodes in an ion trapping experimental system is presented with results. In recent years, many advances have been made in using ion traps for quantum information processing. All of the criteria defined by DiVincenzo for …
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The role of biofilms in Campylobacter jejuni survival in the food chain
… into, biofilms. Biofilms are defined as a surface attached microbial population, surrounded by a self-produced extracellular matrix. Previous work has shown that biofilm formation by C. jejuni is increased in food chain relevant conditions, but C. jejuni biofilms have received little …
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Geochemical Aspects of Waste Disposal
… of kaolinite. The results indicate some iron surface contamination and ferric ion substitution for aluminium in the octahedral layer. An investigation of cation exchange on kaolinite surface was carried out using electron spin resonance spectroscopy as the major analytical tool. Two distinct …
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Collective behavior of colloidal suspensions under electric fields and confinement
… Secondly, we investigate the effects of surface contamination, modeled as a thin dielectric coating, on the dynamics in suspensions of ideally polarizable spheres in an applied electric field using large-scale simulations. As surface contamination becomes significant, a transition from …
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Design and development of a time of flight fast scattering spectrometer : a quantitative surface analysis technique and a new approach towards the experimental investigation of the surface particle interactions
A new surface analysis technique has been developed which has a number of benefits compared to conventional Low Energy Ion Scattering Spectrometry (LEISS). A major potential advantage arising from the absence of charge exchange complications is the possibility of quantification. The instrumentation …
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Flight envelope protection using flap hinge moment measurement
… the sensitivity of flap hinge moment to airfoil surface contamination was conducted at the University of Illinois at Urbana-Champaign Aerodynamics Research Lab. Tests were conducted on two airfoil models, an NACA 3415 and an NACA 23012, at Reynolds numbers of 1.8 × 106 and 1.0 × 106. The effects …
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