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 29 for “"Research Subject Categories::NATURAL SCIENCES"”.
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Optoelectronic processes in polyfluorene ambipolar transistors
This thesis describes the use of charge modulation spectroscopy to investigate the negative and positive charge-induced absorptions in conjugated semiconducting polymers as a way to experimentally compare the wavefunctions of electrons and holes. Interactions between light and charges including …
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Non-linear conduction in superconductors
Part I of this dissertation is concerned with the problem of the magnetic field dependence of the surface impedance of superconductors, with particular reference to tin. In chapter 1 the predictions of the simple theory for the behaviour of the surface impedance for different frequencies and fieid …
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Dopant effects on solid-solid transitions in atomic clusters
… clusters (i.e. nanoalloys) are currently a subject of intense interest because their properties can be tuned by adjusting the cluster size and composition. Previous work has demonstrated the sensitivity of cluster structure and melting temperature to the presence of a single dopant atom. …
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Performance analysis of assisted-GNSS receivers
The goal of this thesis is to improve the understanding of the performance of Global Navigation Satellite System (GNSS) receivers that use assistance data provided by cellular networks. A typical example of such a receiver is a mobile phone including a Global Positioning System (GPS) receiver. …
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Genome-wide microscopy screening identifies links across processes including a conserved connection between DNA damage control and the microtubule cytoskeleton
Previous PhD students in the lab created a method for large-scale, high-content microscopy screening of a cell library consisting of over 3000 single mutant strains of the fission yeast, Schizosaccharomyces pombe. Each strain has one nonessential gene knocked-out, allowing investigation of the …
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Bayesian source inversion of microseismic events
… the driving processes. Earthquakes either occur naturally, such as in volcanic eruptions and natural geothermal fields, or are linked to anthropogenic activities including hydrofracture of gas and oil reservoirs, mining events and extraction of geothermal fluids. Source inversion is very …
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Multiscale hybrid simulation of brittle fracture
When a brittle material is loaded to the limit of its strength, it fails by nucleation and propagation of a crack. The conditions for crack propagation are created by the concentration of a long-range stress field at an atomically sharp crack tip, creating a complex and strongly coupled multiscale …
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The far-ultraviolet spectroscopy of molecules of astrophysical interest
More than 40 different molecules have been observed in Interstellar space within the Galaxy. Many of these molecules are seen near hot OB-type stars whose far-ultraviolet emission is intense. Laboratory spectroscopy of such molecules will lead to a better understanding of their astrophysical …
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Molecular and phylogenetic analysis of a Bacillus thuringiensis genetic locus
… it to represent the second identification of a natural C-terminal truncate of a Cry4-type protein, the first being Cry10A. The missing C-terminal region of AMl appears to be encoded as a complete Orf ($\textit{am2}$) immediately downstream of the first protein gene. When DNA containing both the …
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