Thesis (D. Aeronaut.)--Catholic University of America, 1956. / Description based on print version record. Bibliography: p. 44-46.

Thesis (M.A. in Security Studies (Defense Decision-Making and Planning))--Naval Postgraduate School, March 2010. / Thesis Advisor(s): Wirtz, James. ; Yost, David. "March 2010." Description based on title screen as viewed on April 27, 2010. Author(s) subject terms: Type fissile material cut-off treaty, high enrich uranium, low enrich uranium, atoms for peace, nuclear reactor propulsion. Includes bibliographical references (p. 59-63). Also available in print.

Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 2005. / Thesis Advisor(s): Robert W. Ashton. Includes bibliographical references (p. 83-84 ). Also available online.

Thesis (doctoral)--Göteborgs universiter, 1983. / Extra t.p. with thesis statement inserted. Includes bibliographical references (p. 72-74).

Thesis (M.A.) -- Central Connecticut State University, 2006. / Thesis advisor: M.B.B. Biskupski. "... in partial fulfillment of the requirements for the degree of Master of Arts in History." Includes bibliographical references (leaves 102-104). Also available via the World Wide Web.

Thesis (M.S.)--Bowling Green State University, 2006. / Document formatted into pages; contains xii, 64 p. Includes bibliographical references.

Thesis (MScIng)--University of Stellenbosch, 2008. / Bibliography. Also available via the Internet.

The dynamic behaviour of an active-passive motion compensation system for handling towed marine vehicles is examined, and a mathematical model developed. In the analysis, the passive system considered is pneumatic, while the active system is electro-hydraulic. The towed body is assumed to be a point mass subjected to hydrodynamic drag, and attached to the motion compensator by means of a linear spring representing the cable. It is not intended, in this project, to model the towed body in greater detail. The equations of the passive, active, and towed body systems are derived, and linearized to permit a relatively simple frequency-domain solution. A time simulation based on the nonlinear equations, including Coulomb friction in the compensator, is developed for use on an IBM Systeis/370 computer. A laboratory model is used to conduct experiments at three frequencies, and the results indicate good agreement between the linear, simulation, and real models. Extension of the equations to cover multi-frequency inputs, two-dircensiona1 towing cables, and slow-acting servovalves is also discussed to facilitate application to marine systems. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

Statics and dynamics of the neutrally buoyant inflated viscoelastic cantilevers constituting a submarine detection system is investigated. Two geometries of the thin-walled beams are considered: uniform circular cylindrical and circular tapered. The static flexural behaviour of the beam is studied using the three parameter viscoelastic solid model which yields material properties for the mylar-polyethylene-mylar plastic film used. Results of a detailed experimental program are also presented to substantiate validity of the analytical model. This is followed by free vibration analyses of the inflated cantilevers in the ocean environment accounting for the added inertia and nonlinear hydrodynamic drag. For the uniform cylindrical beam, thin-shell theories are employed to account for the inflation effects on the free vibration characteristics. A significant feature of the analysis is the reduction of the shell equations (the membrane, Fliigge's, and Herrmann-Armenakas') into a single equation which is similar in form to that for a vibrating beam with rotary inertia effects. The natural frequencies obtained are compared with the experimental results and those predicted by the Rayleigh-Ritz method in conjunction with the Washizu and membrane shell theories. The analyses show, and experimental program confirms, that Fliigge's shell equation in the reduced form is capable of predicting free vibration behaviour quite accurately. However, the reduction technique should be applied with care, since in several cases it leads to misleading results (e.g. in the case of Herrmann-Armenakas theory). For the tapered case the elementary beam theory is used to predict their natural frequencies. Next, the dynamical response of the uniform and tapered cantilevers to root excitation, at the fundamental wave frequency and its second harmonic, is studied. The governing nonlinear equations are analyzed by taking two terms of the assumed Fourier series solution. Results suggest that for the case of the simple harmonic excitation, the nonlinear hydrodynamic drag introduces no superharmonic components into the response. For low forcing frequencies typical of the ocean environment, an increase in taper ratio tends to reduce the tip amplitudes. However, for frequencies above the fundamental, the response characteristics are completely reversed. The analysis provides valuable information concerning the system parameters leading to critical response and hence should prove useful in the design of inflatable members employed in the submarine detection system. / Applied Science, Faculty of / Mechanical Engineering, Department of / Graduate

The relationship between cross-flow at a waterjet inlet and delivered thrust is not fully understood. A direct thrust measurement system was designed for a waterjet propelled, free running USV. To induce sway velocity at the waterjet inlet, which was considered equivalent to the cross flow, circles of varying radii were performed at Reynolds Numbers between 3.48 x 106 and 8.7 x 106 and radii from 2.7 to 6.3 boat lengths. Sway velocities were less than twenty percent of mean forward speed with slip angles that were less than 20°. Thrust Loading Coefficients were compared to sway as a percent of forward speed. In small radius turns, no relationship was seen, while in larger radius turns, peaks of sway velocity corresponded with drops in thrust, but this was determined to be caused by reduced vehicle yaw in these intervals . Decoupling of thrust and yaw rate is recommended for future research. / Thesis (M.S.)--Florida Atlantic University, 2013.