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 68 for “"channelling"”.
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Laser-Matter Interactions at Extreme Irradiance: X-ray Generation and Relativistic Channelling
… laser-produced X-rays and relativistic channelling. These lasers produce short pulses, of the order of 50 fs, with energies ranging from 1 mJ to 1 J. Thus, the peak powers reach several terawatts and with the most powerful laser system the peak irradiance exceeds 10^19 W/cm^2. …
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The formation of epitaxially stabilized nickel and cobalt silicides by pulsed laser annealing
… was carried out using well established RBS and channelling techniques. In the bulk form, and in thin films, NiSi has an orthorhombic MnP crystal structure and cannot grow epitaxially on the cubic silicon substrate and channelling is nto observed in the silicides thus prepared. Since NiSi melts …
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Critical current anisotropy in high temperature superconductors
… Lett. 79, 12, pg. 2332) observed a striking flux channelling effect in vicinal YBa2Cu3O7-δ (YBCO) films. By confirming, and extending, this observation, it is demonstrated that this is an intrinsic effect. The results obtained, appear to fit well with the predictions of a field angle dependent …
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PROOF-OF-PRINCIPLE TEST FOR AN EXPERIMENT FOR SHORT-LIVED PARTICLE DIPOLE MOMENTS AT LHC
… the ALADDIN concept, which exploits bent-crystal channelling to produce forward charm baryons and measure their spin precession. The thesis reports simulation studies supporting the optimisation of the ALADDIN tracking system and assessing detector performance. A significant portion of the …
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Interstitial-impurity trapping in Al-Fe and Al-Zn
… contradiction between the internal friction and channelling symmetry evidence. This also allows for an interpretation in terms of a <100>-mixed dumbbell which is consistent with previous theory and channelling and Mossbauer measurements. The results for AI-Fe differ greatly from those obtained …
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Dynamical models for novel diffraction techniques in SEM
… of SEM diffraction techniques:incident beam channelling, or diffraction in, powerful when it comes to resolving individual dislocations close to the surface; and back(/forward)scattering diffraction,or diffraction out, which provides a variety of information about grain …
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Flow patterns and performance of distillation trays
… diameter trays. Scale·up failures due to liquid channelling have occurred, and it is known that fitting flow control devices to trays sometirr.es improves tray efficiency. Several theoretical models which explain these observations have been published. Further progress in understanding is at …
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An Examination of the Place of Fresco in Contemporary Art Practice
… framework for fresco; 2) an exhibition, Channelling Time, at the Lethaby Gallery, from 22 April to 3 May 2003; and 3) a critical analysis and conclusion that defines the research. The thesis is intended to explore issues in experimental fresco works and to provide a critical account of …
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Effect of liquid flow patterns on distillation trays
… the water temperature profiles reveal how liquid channelling may reduce the tray efficiency. The first experiment was to observe the flow of water only over an unperforated tray. With the exception of very low weir loads, the flow separated at the ends of the inlet downcomer. This caused liquid to …
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Ethnic identity amongst the mixed-bloods of the Great Lakes Region, 1760-1830
… differences more readily than class barriers, channelling inter-group relations along class lines. Surrounding Indian and White groups did not develop identifiable ethnic categories for mixed-blood individuals before 1820. Certain mixed-bloods formed a moving cultural bridge between Indian and …
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The condensation of vapours of binary immiscible liquids
… fundamental mechanisms of condensation, a channelling mode on the oxidised copper and a standing drop mode on the gold. Models based on the different mechanisms are proposed and predict the experimental results to within ± 20%. Finally it is postulated that the temperature dependent mutual …
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The Electronic Properties of Thin Film YBa2Cu3O7 Low Angle Grain Boundaries
… current density, JcGB, is determined by the channelling of vortex segments still lying within the LAGB. The channelling regime is seen in angular measurements as a marked decrease in JcGB(θ,φ) as field becomes aligned to within critical angles φK or θK of the LAGB. The aligned vortices …
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An investigation into the viability of UWB as lower-layer for Bluetooth
… Ultra Wideband (BToUWB) system is implemented by channelling an existing compliant Bluetooth connection’s data over an Ultra Wideband Medium Access Control (MAC) and Physical (PHY) layer radio channel. The aim of this project is to provide a description of the methodology used to create a BToUWB …
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Riotous Reform, Staging Complaint, 1561–1595
… in the formation of commons identity and in the channelling of popular unrest.
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Psychotic creativity. A Foucauldian discourse analysis of alternative conversations about mental illness and mental health
My study has investigated how the practice of channelling symptoms of psychosis through the medium of creative art forms has empowered three young adults to create alternative discourses to trouble and unsettle the dynamic of power between service provider and service user through the interweaving …
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Laser Annealing of Ion Implanted Silicon
… Ar laser. We use SEM to investigate the electron channelling pattern to study the quality of crystalline regrowth. For BF(,2)('+) implanted silicon, the boron and fluorine atomic profiles are measured by secondary ion mass spectrometry (SIMS) on as-implanted samples as well as laser annealed …
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The political economy of innovative development financing : a case study of donor funded risk capital financing in South Africa
… This involved testing both the process of channelling aid, as well as the results achieved. Although not a panacea to all problems of traditional aid, the results indicate that innovative aid modalities have the ability to translate into higher equilibrium allocations for the donor in terms …
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Reconstituting troublesome youth in Newcastle upon Tyne : theorising exclusion in the night-time economy
… night-time economy functions through a number of channelling and redistributive processes. The ‘chav element’, whilst being rejected from many venues, is not wholly excluded from the city centre, but segregated and contained in certain locales. Pointing to a more nuanced idea of exclusion as a …
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Recrystallisation Of Strontium Titanate
… backscattering spectrometry (RBS) and ion channelling to investigate this effect. Thin amorphous films were produced on single crystal substrates of (100) strontium titanate by ion bombardment. Specimens were annealed under controlled ambient conditions and the solid phase epitaxial …
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A causal relationship between financial intermediation and economic growth: A case study of South Africa
Financial intermediation is responsible for channelling funds throughout the economy and acts as the main source of production in any economy. More specifically, financial intermediation acts as a link between savings and investment in the economy through the successful transfer of saving into …
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