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 28 for “"The Torch"”.
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BRICS Currency and Dollar Hegemony: Passing of the Torch?
<p>The dawn of the 21st century has brought with it tremendous uncertainty with regard to the nature of global dominance. As doubts concerning the United States’ viability as a hegemon emerge, questions about how new powers may come to prominence circle (Rapayane, 2020). The BRICS bloc -- …
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Carrying the torch: Five faculty members’ experiences as champions of assessment
This phenomenological study examined the lived experience of community college faculty champions of learning outcomes assessment. This study sought to elucidate the experiences of faculty champions of assessment by exploring both what the participants experienced as well as how they experienced …
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Sacred Flame: 100 Years Later Still Bringing Communities Together
The Olympic torch relay, as the essential bond between the ancient and the modern Olympic Games and the symbol of Olympism, serves as the prelude to the Olympic Games and conveys a message of peace, goodwill and friendship along its route. Even though the torch relay is one of the most essential …
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Operation Characteristics of a Plasma Torch for Supersonic Combustion Applications with Simulated Cracked JP-7 Feedstock
… conducted at Virginia Tech has examined plasma torch operational characteristics using a feedstock gas of mixed hydrocarbons representing a cracked JP-7 surrogate. The tests were part of a program to examine the torch as an igniter and flame-holder for hydrocarbon-fueled scramjet engines. …
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Passing on the Torch: A study of the transfer of the Irish Christian Brothers’ educational mission to a lay trust, with particular reference to DEIS secondary schools.
In October 1999 the Irish Christian Brothers decided in principle to establish a new lay trust, the Edmund Rice Schools Trust. In June 2008 it assumed trusteeship responsibility for almost one hundred schools. This study had six research aims. Firstly, this study examined the original charism or …
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The development and operating characteristics of an improved plasma torch for supersonic combustion applications
The design of the VPI plasma torch, which has been used as an ignitor and flameholder in supersonic combustion studies, has been modified in order to decrease the electrode wear and to increase stability. The plasma torch can be used as a source of hydrogen or nitrogen radicals which initiate and …
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Performance of a Plasma Torch with Hydrocarbon Feedstocks for Use in Scramjet Combustion
… Virginia Tech on a high-pressure uncooled plasma torch to study torch operational characteristics with hydrocarbon feedstocks and to determine the feasibility of using the torch as an igniter in scramjet applications. Operational characteristics studied included electrical properties, such as arc …
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Modeling of non-equilibrium plasmas in an inductively coupled plasma facility
This work presents the results of the numerical simulation of ionized gas flows inside the torch of an inductively coupled plasma facility in the von Karman Institute for Fluid Dynamics. The main purpose of this work is the parametric investigation of thermo-chemical non-equilibrium effects on the …
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Operation of a High-Pressure Uncooled Plasma Torch with Hydrocarbon Feedstocks
The main scope of this project was to determine if a plasma torch could operate on pure hydrocarbon feedstocks and, if so, to catalogue the torch operational characteristics. The future goal of the project is to design a plasma torch for supersonic combustion applications that operates off of the …
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Burning protests, the rhetoric of agitation and control of the journey of harmony tour
<p>This study is a rhetorical analysis of the protests that occurred along the international leg of the 2008 Beijing Olympic torch relay. This study aimed to identify the rhetorical strategies employed by the agitators that were demonstrated along the torch relay. There were two agitative groups: …
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Optimisation of automated gas metal arc fillet welding
Gas Metal Arc Welding (GMAW) has been one of the most widely used industrial welding processes since around the middle of the 20th Century. However, the large number of input parameters and variables makes it extremely challenging to understand exactly what impact the variation of each of the …
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Modeling Robotic Wire Arc Additive Manufacturing Process Using Machine Learning
… and much more easily accessible compared to other metal AM processes. However, a significant challenge with current WAAM processes is the high surface roughness and variance of the height and width of the produced parts. These parts often require additional machining to achieve the desired …
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Uncooled choked plasma torch for ignition and flameholding in supersonic combustion
… investigation on an uncooled choked plasma torch using hydrogen/argon mixtures as a propellant was conducted. This low-power plasma torch was designed to be used as an ignitor and flameholder in supersonic combustion. The anode and cathode were made of two-percent thoriated tungsten, and no …
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Transient model of preheating a submerged entry nozzle
Adequate preheating of the submerged entry nozzle (SEN) is important to avoid problems such as thermal cracks and skulling, and depends on torch configuration, fuel, SEN geometry and other factors. A steady-state axisymmetric computational model of the flame, combustion reactions, and air …
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A case study of aspects of the political life of Advocate Benjamin Magson Kies (1917 - 1979) and of "The Torch" newspaper with which he was closely connected, showing how the criminal justice system in South Africa was employed in an attempt to silence political and ideological opposition to the apartheid regime
… 1) writes that in his biography of Nongoloza Mathebula "we , can ,see ..... the story of one man's search for justice within the context of the most important labour repressive institutions that developed during the South African industrial revolution. He states that he has provided a local …
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Washington D.C. | Olympic Metamorphosis
This thesis began by studying how a temporary event could create permanent architecture and how that architecture could change an urban lifestyle. I chose the Olympics as the event and proposed that they be held in Washington D.C., a city of international prominence with a rich design history but a …
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Simulation of Electrical Characteristics in Oxyfuel Flame Subject to An Electric Field
The oxyfuel cutting method is still widely used nowadays, even though it is not a fully autonomous process. Thisthesis presents a computational model to study ion and electron transport and current-voltage characteristics inside a methane-oxygen flame. By finding the relationship between …
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Development and Testing of an Integrated Liquid-Fuel-Injector/Plasma-Igniter for Scramjets
… igniter was tested in cold flow using the Virginia Tech supersonic wind tunnel at Mach 2.4. The liquid fuel (kerosene) injector is flush wall mounted and consists of a 2 hole aeroramp array of impinging jets that are oriented in a manner to improve mixing and atomization of the liquid …
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Optimization of new semi-automatic TIG welding process for surface quality through taguchi method
… is an extremely important arc welding process. The aims of this research project are to find optimization parameters in weld bead using TIG. Semi-automatic TIG was developed to ensure the success of this research project. Samples are produce in single bead and padding bead on top of substrate …
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Revestimentos a base de Ta/Al2O3 produzidos por aspersão térmica sobre substrato metálico
Metal substrates were coated by thermal spraying plasma torch, they were positioned at a distance of 4 and 5 cm from the nozzle exit of the plasma jet. The starting materials were used for deposition of tantalum oxide powder and aluminium. These two materials were mixed and ground into high-energy …
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