Thesis (M.S.)--Oregon State University, 2010. / Printout. Includes bibliographical references (leaves 40-41). Also available on the World Wide Web.

Thesis (M.S.)--Naval Postgraduate School, 1964. / Includes bibliographical references (leaves 94-96).

Thesis--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 218-230).

Thesis (Ph.D.)--Brown University, 2005. / Vita. Thesis advisor: Humphrey Maris. Includes bibliographical references (leaves 141-145). Also available online.

Dissertation (Ph.D.) -- Worcester Polytechnic Institute. / Keywords: Multiphase flow; Two-fluid modeling; Direct numerical simulation; Two fluid modeling. Includes bibliographical references (leaves 116-119).

This study investigates the self noise from a ventilated supercavitating vehicle. A ventilated supercavity is a gaseous envelope surrounding an underwater vehicle that significantly reduces the drag felt by the vehicle. But the hydrodynamic noise generated by the creation of the supercavity could impact the successful deployment of the vehicle. A principal source of self noise for these types of vehicles is sound created by the ventilating gas jets impinging on the air-water interface. Analytical models of the radiated sound through the interface have been developed. Sometimes jets impinging on the interface entrain bubbles beneath the surface. This thesis outlines a theory to predict the influence of bubbles near the interface. Experimental measurements were made at the Naval Undersea Warfare Center (NUWC) in Newport, RI to test the accuracy of the model. These measurements include the unsteady force spectrum of a gas jet impinging on a rigid wall. The acoustic pressure spectrum of a gas jet striking the air-water interface was also recorded. The experimental results were compared to theoretical models for validation.

The dissertation consists of three chapters. In the first chapter, I develop a model to study the production of private safe assets by the banking sector. In response to a shortage of safe assets, the banking sector produces more private safe assets which alleviate the decline of aggregate investment and output. However, producing more private safe assets exposes the bank to more aggregate risk. Macroprudential policies can adjust the production of private safe assets with a tradeoff: encouraging the production of private safe assets alleviates the safe asset shortage problem and improves output, at the cost of a more volatile economy. In the second chapter, I document that during the 2008 financial crisis, U.S. shadow banks deleveraged sharply while commercial banks maintained their leverage. I find that banks that relied more on short-term funding tended to deleverage more during the crisis. I build a model to incorporate both shadow banks and commercial banks with different leverage determination mechanisms. The model can explain the leverage dynamics of the banking sector and the flight-to-quality phenomenon observed in data. The third chapter is coauthored with Jianjun Miao and Pengfei Wang. We revisit Galí’s (2014) analysis by extending his model to incorporate persistent bubble shocks. We find that under adaptive learning, a stable bubbly steady state and the associated sunspot solutions under optimal monetary policy are not E-stable. When deriving the unique forward-looking minimum stable variable (MSV) solution around an unstable bubbly steady state, we obtain results that are consistent with the conventional views: leaning against the wind policy reduces bubble volatility and is optimal. Such a steady state and the associated MSV solution are E-stable.

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Yes / Amid its rapidly increasing usage and immense public interest the subject of Bitcoin has raised profound economic and societal issues. In this paper we undertake economic and econometric modelling of Bitcoin prices. As with many asset classes we show that Bitcoin exhibits speculative bubbles. Further, we find empirical evidence that the fundamental price of Bitcoin is zero.