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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Design and safety analysis of an in-flight, test airfoil

McKnight, Christopher William 30 October 2006 (has links)
The evaluation of an in-flight airfoil model requires extensive analysis of a variety of structural systems. Determining the safety of the design is a unique task dependant on the aircraft, flight environment, and physical requirements of the airfoil. With some areas of aerodynamic research choosing to utilize flight testing over wind tunnels the need to design and certify safe and reliable designs is a necessity. Commercially available codes have routinely demonstrated an ability to simulate complex systems. The union of three-dimensional design software with finite element programs, such as SolidWorks and COSMOSWorks, allows for a streamlined approach to the iterative task of design and simulation. The iterative process is essential to the safety analysis of the system. Results from finite-element analysis are used to determine material selection and component dimensions. These changes, in turn, produce different stress profiles, which will affect other components. The unique case presented in this study outlines the process required to certify a large swept-wing model mounted to a Cessna O-2 aircraft. The process studies the affect of aerodynamic loading on the hard-point structure inside the wing, as well as the model mounting structure, and support strut. The process does not end when numerical simulations indicate that each system is safe. Following numerical work, a series of static tests are used to verify that no unforeseen failures will occur. Although the process is tailored to one specific example, it outlines an approach that could be applied to any test platform. A different model may create a physically different system, but the safety analysis would remain the same.
62

A new technique for high performance tandem time-of-flight mass spectrometry /

Katz, Daniel Louis. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2001. / Typescript (photocopy). Includes bibliographical references (leaves 56-58). Also available online.
63

Women's work as the labour of sexual difference : female employment in the airline industry

Tyler, Melissa Jane January 1997 (has links)
This thesis is based on an empirical investigation of women's work in the airline industry. It aims to build on previous research into women's work by focusing not on the commodification of women's perceived nature (James, 1989), on femininity (Davies, 1979) or on women's sexuality (Hochschild, 1983, Adkins, 1995), but on the commodification of sexual difference, based on an analytical account of empirical research into the flight attendant as the iconic sexually differentialized labourer. The two key findings which emerged from the research are, first, that as one respondent put it, the flight attendant is " part mother, part servant, part tart"; her work is essentialized, feminized and also sexualized. The research suggested that these three processes are so closely interrelated that they actually constitute analytically distinct elements of the same labour process through which not only se~ gender and sexuality but sexual difference - "the specific properties ... qualities ... or attributes that women have developed or have been bound to historically ... which make them women not men" (De Lauretis, 1989: 5-6) - is commodified. The second theme is that, as sexually differentialized labourers, women workers are managed through the manipulation and maintenance of their 'organisational bodies', through a range of managerial techniques which involve, at least in part, a process of instrumental aestheticization. The underlying aim of this thesis is to offer a theoretical account of the sexual differentialization of women's work in an attempt to contribute to the development of a criticaL feminist theory of the commodification of sexual difference.
64

The Subminiature Flight Safety System (SFSS) Development Progress

Lambeth, Stephen, Dehmelt, Chris 10 1900 (has links)
ITC/USA 2013 Conference Proceedings / The Forty-Ninth Annual International Telemetering Conference and Technical Exhibition / October 21-24, 2013 / Bally's Hotel & Convention Center, Las Vegas, NV / SFSS is a universal, small, and low cost, functionally redundant flight termination system (FTS) that incorporates encoding, processing and TSPI capabilities, provides critical health/safety/welfare monitoring and allows for highly efficient telemetering of weapon application and FTS data. The SFSS is intended as a solution to provide weapon system developers, test agencies, and range safety officers the ability to track, monitor, and if necessary, terminate all types of weapon systems. The SFSS components are intended to significantly reduce the recurring costs and improve the quality of test support by minimizing physical intrusion into weapon systems, and potentially eliminating the need for warhead removal. In addition, a common hardware suite assists in reducing the overall system cost of acquisition, a key element in today's world of stressed budgets. The SFSS is designed to interface with newly developed weapon systems, while providing the capability to be integrated into existing weapon systems with nominal modifications to the platform. The SFSS development is a multi-disciplinary effort, whose participating organizations include industry suppliers, range and system safety representatives, and technical offices from all branches of the armed services, as well as the weapons vendors to ensure that applicable technical and regulatory requirements are met. The original requirements for the project were defined within the SFSS System Performance Specification (SPS), which has undergone a number of updates as the design effort has progressed from concept to assembly and debug of the prototype components. This paper will provide an overview of the overall program status, key features of the SFSS including features added during development, critical design challenges, and additional activities planned to enhance the functionality of the system.
65

Ecophysiology of hummingbird flight along elevational gradients: an integrated approach

Altshuler, Douglas Leonard 14 March 2011 (has links)
Not available / text
66

A near-perfect flying machine : the 3D kinematics of hoverfly flight

Gundry, Jamie January 2011 (has links)
No description available.
67

A comprehensive orientation and position display for instrument flying

Lager, Kenneth Ervin, 1934- January 1965 (has links)
No description available.
68

Characteristic velocity requirements for rendezvous between non co-planar orbits

Fraser, Robert Bruce, 1939- January 1963 (has links)
No description available.
69

Relativistic limitation on ionic propulsion and time dilatation in space travel

Dayton, John Blackford, 1924- January 1962 (has links)
No description available.
70

The electromechanical design of the control mechanism for a single degree of freedom flight simulator

Cummings, Francis Lynn, 1932- January 1961 (has links)
No description available.

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