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.
Results
Showing 1 to 18 of 18 for “"long length"”.
-
Structure, Properties and Treatments of Carbon Nanotube Fibres
… mechanical, thermal and electrical properties along their main axis, superior to those of most materials. These can be exploited on a macroscopic scale by assembling the CNTs into a fibre with the nanotubes preferentially oriented parallel to each other and to the fibre axis. CNT fibres can be …
-
Superconducting Transition-Edge Sensor Physics
… of magnitude on square Mo/Au bilayers ranging in length from 8 to 290 microns. We find our measurements have a natural explanation in terms of a spatially varying order parameter that is enhanced in proximity to the higher transition temperature superconducting leads (the longitudinal proximity …
-
Spontaneous brillouin scattering quench diagnostics for large superconducting magnets
… fiber optic sensor has been developed for these long-length superconducting magnets that simultaneously measures the temperature and strain based on spontaneous Brillouin scattering in an optical fiber. Using an extremely narrow (200 Hz) linewidth Brillouin laser with very low noise as a …
-
Silica Fiber with Large and Thermodynamically Stable Second Order Optical Nonlinearity
… SHG efficiency equation, a small radius and a long length will help to result in a high SHG efficiency, which also increases with the excited power. We fabricate silica fiber tapers with radius less than 5 μm through either wet etching or heating while stretching. Through improving the …
-
Surface Passivation of Colloidal II-IV Semiconductor Quantum Belts and Quantum Wires: Synthesis, Mechanism and Optical Studies
… of 1.5-2.0 nm with a width of 7-15 nm and length of >1 micrometer. Most remarkably, the QBs have a superior morphology with noticeably high quantum efficiency: QE, 30 ± 10 %), comparable to quantum rods. High QE is explained by a delocalized exciton recombination with a lower density of …
-
YBa2Cu3O7-x thin films prepared by Chemical Solution Deposition
… are essential conditions for the preparation of long length YBCO films, the cost effective chemical solution deposition (CSD) procedure was selected, given that no vacuum technology is required. To reveal the flexibility and the good optimization possibilities of the CSD approach two main …
-
Offshore marine visualization
… ocean? By lowering a large rock tied to a very long length of rope he determined that the ocean was 2km deep. These line and sinker methods were used until the 1920s when oceanographers developed the first echo sounders that could measure the water's depth by reflecting sound waves off the …
-
Heat, Charge and Spin Transport of Thin Film Nanostructures
… important for device engineering and allows for long spin lifetimes. Third, we present on spin transport through disordered magnetic insulators. We observe spin Hall effect driven magnon transport through materials with no long-range order but with local antiferromagnetic exchange interactions. …
-
Studies of DNA dynamics in slit-like nanochannel confinement
… level, embedded in the sequence of basepairs along the DNA backbone. Further development, though, is now limited by the ability to control and manipulate the position and conformation of single DNA molecules. It was recognized long ago that confinement of polymer molecules in geometries with …
-
The control of gold and latex particles on optical waveguides
… trapping of many particles due to the long length over which a strong intensity gradient is present. A channel waveguide used to produce such an evanescent wave can be photolithographically defined on a flat substrate and thus can be integrated with other micron scale processes. This …
-
Genomic diversity and genomic typing of Salmonella enterica serovar Typhimurium
… five clades, with the majority of the isolates belonging to clades 1 and 2. The genotype clusters defined primarily by composition of the CRISPR arrays correlated well with the sub-lineages and genotypes determined by SNP analysis. In the third study of this thesis, a total of 12,112 S. …
-
Optical pulse distortion and manipulation through polarization effects and chromatic dispersion
… We next exploit the recent availability of ultra-long length chirped fiber Bragg gratings (FBG). Their enormous chromatic dispersion enables methods of improving current techniques in sensing and high speed optical sampling. In one experiment, we modulate the frequency of a standard distributed …
-
Exploring Tissue Microstructure in Healthy and Diseased Lung Tissue
… healthy and diseased) at a variety of diffusion lengths. Diffusion Magnetic Resonance Imaging: MRI) has been a very useful tool in the study of lungs and lung disease, particularly diffusion MRI using hyperpolarized gases, such as helium or xenon. However, since the polarized gas is difficult to …
-
Modeling and simulation of the equilibrium and nonequilibrium dynamics of DNA
DNA is a long and slender polyelectrolyte that facilitates the storage, retrieval and transfer of genetic information in living cells. The cell processes by which genetic information is stored, copied or transcribed induce forces and torques in DNA that alter its structure. These structural changes …
-
Novel techniques and materials for optical telecommunication systems
… a repetition rate of 10GHz is first presented. Long-term stable operation is ensured by the use of an optical phase lock loop to maintain resonant operating conditions. The ring laser incorporated a long length of dispersion-shifted fibre that enhanced soliton compression of the generated …
-
Computer simulation of lipids and DNA using a coarse grain methodology
… valuable they do not consider the macroscopic length scales of the molecule. Simplified<br/>models trying to capture long length scales have had to compromise on the molecular level<br/>detail. Coarse grain models while trying to bridge the gap have also remained largely idealistic<br/>in …
-
Shape and chemically anisotropic colloidal particles: A theoretical study of their structure, phase behavior, and slow dynamics
… repulsive glass regime is characterized by long localization lengths and barrier locations, dictated by repulsive hard core interactions, while the bonding dominated gel region has short localization lengths (commensurate with the attraction range), and barrier locations. There exists a …
-
Chemisch deponierte Schichtsysteme zur Realisierung von YBa2Cu3O7−d-Bandleitern
Die vorliegende Arbeit beschäftigt sich mit der Entwicklung neuer Schichtsysteme für die Realisierung biaxial texturierter hochtemperatursupraleitender Bandleiter. Bisher sind eine Vielzahl von Bandleiterarchitekturen bekannt, die sowohl durch physikalische Depositionsmethoden als auch mittels …