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 54 for “"Implosion"”.
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Analytic and numerical study of underwater implosion
Underwater implosion, the rapid collapse of a structure caused by external pressure, generates a pressure pulse in the surrounding water that is potentially damaging to adjacent structures or personnel. Understanding the mechanics of implosion, specifically the energy transmitted in the pressure …
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Implosion Fabrication: Rethinking 3D Nanofabrication from First Principles
… new technology for nanofabrication called Implosion Fabrication (ImpFab). This technology was borne of three basic insights. First, that 2D nanofabrication is predicated on the planar deposition of functional materials; therefore, a truly 3D nanofabrication process might be enabled by a …
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Air/gas system dynamics and implosion control of fossil fuel power plants
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
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Laser-driven implosion characterization by the analysis of charged-fusion-product energy spectra
Energy spectra of charged-fusion products escaping laser-imploded deuterium-tritium filled glass microballoon targets were measured with a time-of-flight (TOF) spectrometer. The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.
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A dynamic two-level theory of state implosion: The cases of Lebanon, Algeria, and Yugoslavia
Why do state implosions occur? This question urges itself on theorists and practitioners in international relations and security in the aftermath of the dissolution of the Soviet Union. Despite the importance of the question, contemporary security and international relations theory has devoted …
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A computational and experimental study of the underwater implosion of single and multiple metallic spherical shells
Analysis of the implosion of pressure vessels in a deep-water environment is an important research area for the ocean engineering community. The majority of previous implosion research focused on the implosion of metallic cylinders, while the implosion behavior of volumes of different geometries …
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The Blast Wave Produced by Bursting Spheres With Simultaneous or Delayed Explosion or Implosion of The Contents
… spherical explosions, edge initiated spherical implosions and combinations of the above with and without ignition delays. Although the combustion process was modeled after methane combustion, the technique for generalizing to other fuels was presented. The Oppenheim CLOUD computer program with …
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Implosion in Greece? An analysis of the Greek debt crisis and its impacts on Europe and world markets
This thesis seeks to address the impact of the Greek debt crisis on the stability of the euro and Eurozone, and the best solutions to the crisis. The chapters of this study explore currency unions in theory and practice, the operational components of the Eurozone, fiscal policy and its importance …
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Using time-resolved nuclear diagnostics to probe kinetic/multi-ion physics and shock dynamics on OMEGA and the NIF
… evolution in Inertial Confinement Fusion (ICF) implosions. On the OMEGA laser facility at the Laboratory for Laser Energetics (LLE) in Rochester, New York, the impact of kinetic and multi-ion effects on ICF implosion performance is studied using the Particle X-ray Temporal Diagnostic (PXTD). …
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Supersonic self-similar screw-pinch plasma implosions
… a diffuse current profile. Four separate plasma implosion modes are identified. Apart from constituting a mathematical tour-de-force, the solutions representing the implosion modes differ qualitatively from the Z-pinch and $\Theta$-pinch schemes.
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Fast-ion spectrometry of ICF implosions and laser-foil experiments at the omega and MTW laser facilities
… used to study inertial confinement fusion (ICF) implosions and laser-foil interactions. LPI, which vary in nature depending on the wavelength and intensity of the driver, generate hot electrons with temperatures ranging from tens to thousands of kilo-electron-volts. These electrons, which …
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The Political Economy of Icelandic Nationalism : The Rise of the Rhetoric of 'National Interests‘
… interests in the aftermath of the financial implosion of 2008 is chosen as the event to explore this issue. Is nationalist ideology economically determined? To provide an answer, the first part of the thesis deals with the international context of financialization, beginning with the role of …
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Diagnosing inertial confinement fusion implosions at OMEGA and the NIF Using novel neutron spectrometry
… spectra from inertial confinement fusion (ICF) implosions. Using the MRS, the down-scattered neutron (DSn) spectrum has been used to infer the areal density ([rho]R) of ICF implosions for the first time. The DSn technique is essential for diagnosing high [rho]R (>180mg/cm²) cryogenic …
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Development and use of advanced nuclear diagnostics and neural networks to diagnose 3D morphology and power balance in inertial fusion implosions at OMEGA and NIF
… (NIF) and OMEGA requires new ways of measuring implosion conditions such as the shape of the shell at minimum-volume and the power balance in the hot-spot. This dissertation describes several novel instruments and analysis techniques to measure these. First is a method to combine information …
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Exploring evolution of multi-ion effects and electron temperature in ICF implosions at Omega and the NIF
In inertial confinement fusion (ICF) implosions, one of the most important parameters for quantifying performance is temperature. In this thesis, effects related to temperature evolution of both the ions and electrons within the central plasma are explored in detail. From measurements of multiple …
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An Archaeology of Pain
… which maintain the social body. Through the implosion of binaries, the binary of mind/body is no longer plausible in the explanation of pain. Neuropathic chronic pain and phantom limb pain become cyborg discourses which operate to deconstruct the pedagogies of science and medicine.</p>
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Transmission Linked to Structural Vulnerability: How Low-Income Countries Endured the Great Recession
<p>The implosion of the 2008 financial crisis ignited fears that integration would transmit the crisis’ effects throughout the global system. Examining two countries, Bangladesh and Zambia, this project shows that low-income countries with relatively little integration also saw negative impacts. …
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Using fusion-product spectroscopy to study inertial fusion implosions, stopping power, and astrophysical nucleosynthesis at OMEGA and the NIF
… is used to study ignition-scale inertial fusion implosions, measure charged-particle stopping in dense plasmas to high accuracy, and study reactions relevant to nuclear astrophysics. 'Surrogate' plastic-shell implosions at the National Ignition Facility with D³He fuel produce 14.7-MeV protons. …
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Collective intelligence at Enron during the California energy crisis : uncovering collaborative innovation networks using social network analysis
… in the criminal trial following Enron's implosion with a control group of ordinary employees. I focused on 17 mailboxes of 24 Enron executives that were convicted. Identifying criminals based on email behaviors is possible depending on the sampling strategy. When sampling based on …
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Flow Induced Failures of Copper Drinking Water Tube
… In experiments using an ultrasonic processor, implosion of vaporous cavitation bubbles against a copper surface caused dramatic pitting, considerable copper weight loss, and, in some cases, the development of pinhole leaks. Changes in water chemistry and the existence of a pre-existing …
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