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 “"High dispersion"”.
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Entry-based Planning of Neurosurgical Trajectories
… and trauma patients for the region of high accuracy and the region of high dispersion (p = 0.49, 0.32). There also was no significant difference in catheter length between hydrocephalus and trauma patients for the region of high accuracy (p = 0.17) and the region of high dispersion (p = …
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Three Essays on the Impact of Analysts on Financial Markets
… chapter documents that the price of analysts’ dispersion risk in the cross-section of stock returns changes over time, in particular, turns positive in periods of high analyst dispersion. Our result holds using 100 test portfolios that are double-sorted on their betas and their coefficients on …
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New Approaches to the Synthesis of Porous and/or High Surface Area Transition Metal Oxides
… approaches to the synthesis of porous and/or high surface area transition metal oxides. In addition, applicability and advantage of charged templates where strong Coulomb interactions favour the supramolecular arrangements/assembly were studied. The problems related with the dynamics of …
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Experimental transmission of dispersion managed solitons
… 1150nm over standard fibre. This is done using a dispersion compensating fibre module in each amplifier span to compensate for the high dispersion. The basic principles of soliton propagation in optical fibre are discussed within this thesis, followed by an introduction to advantages of dispersion …
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Characterising catalyst preparation: from adsorbed precursor complex to catalyst particle
Catalyst performance can be enhanced by the high dispersion of precious metals onto supports. The deposition of metal particles and the structural arrangement they adopt once impregnated on a support is therefore of interest in determining the necessary conditions required for maximum catalyst …
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In-situ investigation and mitigation of carbon support corrosion of cathode catalyst in PEM fuel cells
… colloidal method produced Pt/C catalysts with high dispersion and narrow particle size distribution of Pt NPs uniformly loaded on the carbon support. Au NPs with high dispersion and narrow particle size distribution can be made only by the colloidal method. AuPt/C catalysts were synthesized by …
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Catalytic Cracking Of Hydrocarbons With Novel Metal Traps
… traps"), were developed in this study to achieve high dispersion of passivators. FCCTs were extensively tested and demonstrated experimentally. On the strength of these results, it can be stated that high dispersion of the metal traps, using the "in situ" mode of preparation with traps "waiting" …
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Nanostructured Cerium Oxide-based Catalysts for the Chemical Conversion of CO2 to Dimethyl Carbonate and Methane.
… aiming to transform carbon dioxide into high value-added compounds such as dimethyl carbonate (DMC) and methane. Specifically, the research activity was centered on the design and characterization of ceria-based catalysts to improve the efficiency of the direct synthesis of DMC from CO2 …
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Northern San Francisco Bay Ecological Risk Assessment: Potential Crude by Rail Incident
… periods of growth in the spring and summer. The high dispersion rate threatens fish and benthic organisms. Response methods were analyzed for cost, effectiveness, and additional ecological impacts. Shoreline oiling should be limited and mitigated depending on the incident circumstances: allowing …
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Masses of globular clusters
Central velocity dispersions have been derived for 10 globular clusters from high dispersion (6.7A mm-1) coude spectra of the integrated light. Two methods were used. The first involved the comparison of the cluster spectra with star spectra convolved with an appropriate velocity distribution …
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Masses of globular clusters
Central velocity dispersions have been derived for 10 globular clusters from high dispersion (6.7A mm-1) coude spectra of the integrated light. Two methods were used. The first involved the comparison of the cluster spectra with star spectra convolved with an appropriate velocity distribution …
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BULK TITANIUM WAVEGUIDE- A NEW PLATFORM FOR UNIPLANAR MICROWAVE CIRCUITS AND RFMEMS
… loss, while suffering from large circuit size, high dispersion, poor design flexibility, and the necessity of large via holes. CPW improves upon microstrip by bringing the ground to the same level as the signal, therefore providing low dispersion, smaller circuit size, high design flexibility …
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Catalytic Process for the Conversion of Synthesis gas to Ethanol for Use as an Alternative Fuel
Higher alcohols are increasing as a proportion of the transportation fuel market, and can be used as neat fuels, or as blends with conventional fuels. For a number of reasons, these C2+-alcohols will be of interest in the foreseeable future. Large-scale production of higher alcohols will likely be …
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Heterogeneous catalyzed macromolecular hydrogenations in oscillating systems
… kinetics at low polymer concentrations. At higher (10 wt% PS) concentrations, forced pulsing was shown to have a greater impact on observed reaction rates. Selectivity with this extruder-fed reactor was better than with a stirred tank in all cases, due to a more plug-flow-like residence time …
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Rock Physics Study of Lacustrine Shales and Applications in Geophysical Prediction of Sweet Spot
… transverse-isotropy type anisotropy and velocity dispersion and attenuation. Furthermore, I synthesized the geological and discussed physical mechanisms to explain my measured data and observation. The anisotropy of the lacustrine shale is primarily caused by oriented clay minerals, fractures …
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Ultrahigh-Resolution Endoscopic Optical Coherence Tomography for In Vivo Mouse Colonoscopy
… extended the state-of-the-art in endoscopic ultrahigh-resolution OCT. First, axial chromatic aberration of the objective optics acts as a spectral filter in the sample arm limiting the effective bandwidth of the system. An achromatized endoscope design was demonstrated that achieved axial …
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The catalytic reduction of nitric oxide over copper doped aluminosilicates
… of NOx, SO₂ and particulates from flue gas at high temperature. This project forms the initial phase of the development of such a high temperature flue gas cleaning facility and is limited to the study of catalytic NOx reduction over aluminosilicates. A copper ion-exchanged zeolite (Cu-ZSM-5) …
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Holey optical fibres for high nonlinearity devices
… of HF technology in the implementation of highly nonlinear optical devices, as well as showing its limitations. The initial fabrication problems that hindered the production of HFs with a high nonlinearity are identified and several strategies are adopted for its solution, including an …
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