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Forgotten Names is a fifteen-minute programmatic work for wind ensemble and electronics. The piece represents my aim to express conceptually the memories of human lives being lost with the passage of time. The two salient vehicles used to convey the concept are melodic motivic development and pre-recorded electronic audio accompanying the ensemble. The prerecorded electronics work in tandem with the ensemble and provide the audience with inferable aural symbolism. These audio samples are to be triggered by a percussionist by using the free, downloadable program, Pure Data along with a performance file provided by the composer. Forgotten Names also draws its influence from similar works by well-known American composers. The pitch material used in this work is derived from On the Transmigration of Souls by John Adams while the formal structure is influenced by Charles Ives’s The Unanswered Question.

A dissertation submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of requirements for the degree of Master of Science. Johannesburg, 2016. / Wind sensors provide very accurate measurements, however it is not feasible to have a network of wind sensors large enough to provide these accurate readings everywhere. A “virtual” wind sensor uses existing weather forecasts, as well as historical weather station data to predict what readings a regular wind sensor would provide. This study attempts to develop a method using Big Data Analytics to predict wind readings for use in “virtual” wind sensors. The study uses Random Forests and linear regression to estimate wind direction and magnitude using various transformations of a Digital Elevation Model, as well as data from the European Centre for Medium-Range Weather Forecasts. The model is evaluated based on its accuracy when compared to existing high resolution weather station data, to show a slight improvement in the estimation of wind direction and magnitude over the forecast data. / LG2017

Thesis (D.M.A.)--Boston University.

The augmented vertical axis wind turbine resulted from a survey of the problems of existing wind turbines, and the identification of the design criteria that it should be inherently safe and reliable. It should be self-starting in low winds and continue to run in high Winds, and it should be environmentally acceptable. The design consisted of a vertical axis rotor, with five vertical and five horizontal blades, surrounded by an augmentor which contained eight converging stators and a dome desigried to increase the flow rate through the rotor, and to decrease the pressure at exit from the rotor. Extensive model tests showed that the wind turbine had attractive operating characteristics, which were confirmed by a prototype machine with a 6m diameter rotor rated at 10kW. However, a detailed analysis of the design and costs showed that it was too expensive. An analysis of an idealised augmented vertical axis wind turbine showed that there was potential for increasing the performance and decreasing costs. Measurements of the detailed flow field through the rotor and around the augmentor demonstrated that augmentation was by means of an increased pressure drop across the rotor, combined with an increased mass flow rate through it. The efficiency of the upstream part of the rotor was also increased by the augmentor. The benefits of turbulent mixing in the wake of the turbine between the external flowfield and the flow through the turbine were also recognised. Major modifications to the design of the augmentor and rotor resulted in two types of wind turbine which maintained the attractive operating characteristics and appeared to be commercially viable. The designs offer particular benefits in terms of inherent safety and reliability. The potential of cost effective, large multi¬megawatt machines is also recognised. The work has also provided further insight into wind turbine augmentation, and in the design and development of vertical axis rotors.

Solar wind plasma is a turbulent medium, with processes that operate on many scales. Observations below proton scales are rare. Future spacecraft missions will have the required resolution to make these observations, so theoretical experiments and simulations at these scales will become increasingly important in order to match observations to theory. In this thesis, kinetic simulations are used to study electron dynamics within a turbulent electron-proton plasma. Firstly in this thesis, a study of the formation of electron temperature anisotropy due to magnetic reconnection is presented using particle in cell (PIC) simulations of the turbulent decay of sub-proton scale fluctuations. A fluctuation power spectrum with approximately power law form down to scales of order the electron gyroradius is formed. The signatures of collisionless reconnection within the turbulent field are generally associated with regions of strong parallel electron temperature anisotropy. Electrons from spatially different locations, can mix at reconnection sites, generating multi-peaked velocity distribution functions, which could become unstable to further instabilities. This is evidence of an important role for reconnection in the dissipation of small scale turbulent fluctuations. Secondly, a new type of electron scale vortex is discussed, which can spontaneously form during the simulations of turbulence. These are generated by electrons in (quasi) trapped orbits, which diamagnetically reduce the local magnetic field, creating a coherent structure. The properties of these vortices are categorized and compared to observations of similar structures called “magnetic holes” observed within the Earth’s plasma sheet. Finally, we look to understand what dissipation is in a collisionless plasma. We examine signatures of dissipation in the previous simulations, and in simulations where electrostatic electron-electron beam modes are generated within the turbulence.

Typescript, etc. / Digitized by Kansas Correctional Industries

Contains 8 four-part frottole, chiefly by B. Tromboncino, transcribed for various wind quartets. / Digitized by Kansas Correctional Industries

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This thesis is about the processes of creating renewable electricity systems in new locations. Specifically it addresses the challenges and drivers of building-up renewable energy system in a `fast follower' country, Ireland. With increasing scientific, political, civil society and private sector agreement on the need to reduce green-house gas emissions from the provision of electricity, the rolling out of complex, renewable electricity systems from countries in which initial system building activities have taken place to others is an important issue. The primary research question posed is `what explains the growth of the wind electricity system in Ireland?' This question is reflected upon by asking `what does the Irish experience tell us about why and how these systems spread to new locations?' The thesis addresses an innovation studies audience, making a theoretical contribution to the field of sustainability transitions. It contributes to recent research integrating theories from human geography by offering new insights on how location influences building of large scale renewable electricity systems in new jurisdictions. It contributes findings about the rapid development of the Irish wind system that challenge two dominant perspectives; roll-out in Ireland has been driven by EU policy push and the development of the industry is fundamentally about the extent of national subsidies. We find both perspectives are partial; what they omit is likely to be essential to reproducing the Irish experience. This thesis takes as its unit of analysis the wind energy system itself, and using a `technological innovation system' framework, examines and evaluates the structure of the system; the complex arrangement of institutions, actors and technologies; and the dynamic innovation processes or `functions' of the system. An inquiry into the substantive historical contexts of the development of the system make possible insights into the locational characteristics and relations within and between the system; drivers, barriers and influences of direction of the system processes; and the contexts in which decisions are made and technological change takes place. The thesis finds the development of a renewable electricity system in new locations is simultaneously heavily influenced by transnational dimensions of system actors relations and institutions, and shows that while the direction of the emergent technological pathway is influenced at multiple spatial and governance levels, legitimation of the technology is highly localised.