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 24 for “"Enhancement mechanisms"”.
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Pool Boiling of FC 770 on Graphene Oxide Coatings: A Study of Critical Heat Flux and Boiling Heat Transfer Enhancement Mechanisms
… was performed to understand the CHF and BHT enhancement mechanisms. In the presence of graphene-oxide coating, the data indicated an increase of 50% in CHF. As the experiment continued, a partial reduction of graphene oxide occurred, accompanied by (a) further enhancement in the CHF to 77% …
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A numerical study of flow and heat transfer in compact heat exchangers
… scale heat transfer problems. The heat transfer enhancement mechanisms and performance of parallel-plate fin heat exchangers are studied extensively. Geometry effects such as finite fin thickness and different fin arrangements have been investigated. The roles of individual enhancement mechanisms …
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Study of SERS for the detection of drugs of abuse
… of illicit drugs in oral fluid using metal enhancement mechanisms was undertaken. Initial work investigated ecstasy tablet composition using Raman to identify what drugs and excipients might be present in oral fluid samples obtained from users. Overall, it is possible to identify the …
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Reliable broadband satellite-integrated network design through propagation and networking solutions
… of 2.95 dB and 2.88 dB respectively. Different enhancement mechanisms for optimum TCP performance are implemented to combat the large propagation delay associated with a satellite link. It is revealed through the simulation that TCP performance over a satellite link is as efficient as …
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Deep understanding of degradation in lithium ion batteries through experimental and first-principles study
… improvement via ALD technology, the fundamental enhancement mechanisms of ALD coating on battery performance improvement are not yet known. Therefore, this dissertation consists of four papers, which focused on the ALD coating impact on Li intercalation, metal dissolution, Li ion diffusivity and …
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Insights from serological surveillance in infectious disease epidemiology
… antibodies and found that antibody-dependent enhancement mechanisms were best able to explain observed age patterns of infant dengue hospitalizations. I developed an analytical framework for the analysis of multi-pathogen serological data to disentangle the antibody responses of related, …
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Investigation of Offset Analgesia during Acute Central Sensitization, Opioid Administration and Complex Regional Pain Syndrome
… processing of nociceptive information, or the mechanisms supporting how pain is perceived across the timeframe of a stimulus, is one aspect of pain that is disrupted frequently in chronic pain states. For example, patients exhibit symptoms of pain that long outlast the actual duration of the …
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A micromachined magnetic field sensor for low power electronic compass applications
… results. These nonlinearity based sensitivity enhancement mechanisms are utilized in the device design. The complete magnetic sensing system consumes less than 200 microwatts of power in continuous operation, and is capable of sensing the direction of the Earths magnetic field. Such low power …
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Application of adaptive optics to the spectroscopic investigation of small-scale solar structures
… lines. We suspect the existence of two contrast enhancement mechanisms for bright points one exclusively for the G-band, one independent of specific spectral lines. We perform calculations using the results of a three-dimensional magneto-hydrodynamical model as input for a radiative transfer …
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Surface-enhanced Raman scattering and electron spectroscopic studies of copper and silver surfaces.
… goal of this research is to investigate the enhancement mechanisms associated with the surface enhanced Raman scattering (SERS) phenomenon. The approach taken in these investigations is to directly compare the SERS abilities of Cu and Ag surfaces using both SERS and electron spectroscopy. One …
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An analysis of Hong Kong REIT : current and future opportunities for investors
… by prime properties, poor reception of yield enhancement mechanisms in REITs, agency problems and questionable corporate governance of the H-REITs all contributed to suppressing both the supply and demand for local asset-backed H-REITs. Moreover, the small size of the city seems to indicate …
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Effects of surface parameters on boiling heat transfer phenomena
… to enhance pool and flow boiling CHF. The CHF enhancement was due to nanoparticle deposited on the heater surface, which was verified in pool boiling. However, no such work has been done for flow boiling. Using a cylindrical tube pre-coated with Alumina nanoparticles coated via boiling induced …
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Ultra-thin photovoltaic technologies with nanophotonic textures for enhanced solar energy harvesting
… to exploit waveguide resonances as absorption enhancement mechanisms. For this purpose, I build a robust framework to study waveguide modes in ultra-thin devices with integrated textures. Based on this framework, comprehensive computational investigations unravel design-driven mechanisms to …
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Capturing irradiation-enhanced corrosion of zircaloy-4 with a charge-based diffusion/drift phase field model
… less than 10 microns, above which other enhancement mechanisms can no longer be safely ignored. HOGNOSE captures increasing amorphization with decreasing temperature, and more subtle corrosion rate enhancement at higher temperatures. Comparisons between HOGNOSE results and literature data …
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Heat Transfer in Stationary and Rotating Coolant Channels Using a Transient Liquid Crystal Technique
… during rotation. 90deg, W, and M-shaped rib enhancements are studied and detailed heat transfer measurements clearly capture the heat transfer enhancement mechanisms with and without rotation. Jet impingement schemes with single and double rows, normal and off-angle jets, and a cross flow …
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Access to irrigation technology and technical efficiency: a comparison of households with and without access to irrigation technology, in ‘Gorogutu district’, Eastern Ethiopia
… different intensification and productivity enhancement mechanisms and reduce rural household’s food insecurity and poverty. In line with this the Government of Ethiopia and different NGO’s have been promoting irrigation technology as a viable option in enhancing farm productivity and …
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Chemical studies of plasma etchants used in integrated circuit manufacture
… as a function of flow, pressure and power. Etch mechanisms m both systems, including the potential reduction of Si etch rates in CF4 due to fluorocarbon polymer formation, are discussed. Si etch rates in CF4 /SF6 mixtures were successfully accounted for by the models produced. Si etch rates in …
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Multispectral plasmon enhanced quantum dots in a well infrared photodetectors
… be tuned by changing the pitch of the pattern. Enhancement of absorption is predicted for the detector. Experimental demonstration show spectral tuning in MWIR and LWIR regions and a peak absorption enhancement of 4.9x. By breaking the symmetry of the fabricated pattern, we can extract a …
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Experimental and numerical study of flow characteristics and segregation in flow enhanced systems
… two major topics of importance are powder flow enhancement mechanisms and the flow characterization. This dissertation is involved with both of these topics. With respect to the powder flow enhancement, this study involves investigation of two types of flow enhancement methods. The first flow …
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Leveraging Carbon Based Nanoparticle Dispersions for Fracture Toughness Enhancement and Electro-mechanical Sensing in Multifunctional Composites
… In the first, second and third chapters, the enhancement of fracture toughness brought about by the addition of carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) was investigated. CNT-Epoxy and GNP-Epoxy Compact Tension (CT) samples were fabricated with 0.1% and 0.5% nanofiller weight …
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