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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.
11

Naval Station Everett Small Craft Piers Delta and Echo replace or repair analysis with recommendations

Leppard, Benjamin. 05 1900 (has links)
In 1994 the U.S. Navy resurrected a base in Everett, Washington and commissioned it as Naval Station Everett (NS Everett), the new homeport for six Naval vessels. Prior to 1994 the base had seen primary use as the homeport for a number of vessels during World War II. In the early 1940s Piers Delta and Echo were constructed to berth aircraft carriers and other warships. Piers Delta and Echo are 560 feet and 578 feet, respectively, and 46 feet wide. They are constructed out of pier decking and pile caps on timber piles. Naval vessels currently assigned to NS Everett berth at new piers on the base, while Piers Delta and Echo berth the small craft that support the larger vessels. The small craft mission includes tugboat services, base security and environmental response functions, and vessel boarding and search training for local units. / Contract number: N62271-97-G-0075 / US Navy (USN) author.
12

Electo-optic characterization of ZnS:Tb ACTFEL devices for probing the hot electron distribution

Streicher, Keone R. 12 July 1994 (has links)
In this report, the optical characteristics of ZnS:Tb AC driven thin-film electroluminescent devices are evaluated. Luminescence at low and room temperature under a constant phosphor field is recorded in order to probe the hot electron energy distribution. Samples fabricated by atomic layer epitaxy and by sputter deposition are investigated and their differences and similarities evaluated. The ALE sample exhibits a drastic increase in luminescence at low temperature, while the sputtered sample displays a decrease in luminescence at low temperature. The reduction of optical phonon scattering and nonradiative transition rates at low temperature are believed to be responsible for these changes. Differences between ALE and sputtered samples are due to the different fabrication methods. The approach suggested by Krupka in 1972 of determining the hot electron energy distribution by taking the ratio intensities of two luminescent transitions from different upper states in Tb�����, is shown to be inaccurate due to the possible nonradiative transitions taking place. The Tb����� impact excitation quantum yield at a wavelength of 489 nm is measured and is shown to agree with Monte Carlo simulations. Saturation occurs due to the increase in band-to-band impact ionization at high phosphor fields. / Graduation date: 1995
13

United States navy fleet problems and the development of carrier aviation, 1929-1933

Wadle, Ryan David 01 November 2005 (has links)
The U.S. Navy first took official notice of aviation in 1910, but its development of carrier aviation lagged behind Great Britain??s until the 1920s. The first American aircraft carrier, the Langley, commissioned in 1919, provided the Navy with a valuable platform to explore the potential uses of carrier aviation, but was usually limited to scouting and fleet air defense in the U.S. Navy??s annual interwar exercises called fleet problems. This began to change in 1929 with the introduction of the carriers Lexington and Saratoga in Fleet Problem IX. After this exercise, which included a raid by aircraft from the Saratoga that ??destroyed?? the Pacific side of the Panama Canal, the carriers were assigned a wider variety of roles over the next five years of exercises. During this time, the carriers gained their independence from the battle line, which the smaller and slower Langley had been unable to do. Reflecting the advanced capabilities of the new carriers, the fleet problems conducted during Admiral William Veazie Pratt??s tenure as Chief of Naval Operations, 1930-1933, began to test the employment of the new carriers as the centerpiece of one of the opposing fleets within the exercises. The Lexington and Saratoga were used offensively during these exercises, employing their aircraft to sink surface ships, though not battleships, and successfully strike targets ashore. The carriers became successful in spite of the unreliability of early 1930s carrier aircraft, particularly the torpedo bombers, that could carry heavy payloads. Lessons learned from the Lexington and Saratoga Fleet Problems IX through XIV influenced the design of the next generation of American aircraft carriers, the Yorktownclass, which were authorized in 1933. These new carriers were faster and much larger than the carrier Ranger, commissioned in 1934 and designed before the Lexington and Saratoga began participating in the exercises. Features incorporated into the Yorktownclass based on operational experience included the reduced need for large surface batteries because of the use of escort vessels, the emphasis of armoring against shellfire over aerial bombs and torpedoes, and the capability to launch large numbers of aircraft quickly.
14

CV or not to be? alternatives to U.S. sea-based air power /

Cruz, Yniol A. January 2008 (has links) (PDF)
Thesis (M.S. in Defense Analysis)--Naval Postgraduate School, June 2008. / Thesis Advisor(s): Arguilla, John. "June 2008." Description based on title screen as viewed on August 25, 2008. Includes bibliographical references (p. 95-102). Also available in print.
15

CVN 68 class displacement concerns dealing with the differences between the modeled and actual displacements /

Hoskins, Clinton P. January 2009 (has links) (PDF)
Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, September 2009. / Thesis Advisor(s): Calvano, Charles ; Whitcomb, Clifford. "September 2009." Description based on title screen as viewed on 5 November 2009. Author(s) subject terms: Naval Architecture, Aircraft Carrier Displacement Models. Includes bibliographical references (p. 71-72). Also available in print.
16

The impact of long-term aircraft carrier maintenance scheduling on the Fleet Readiness Plan /

Hall, Matthew H. January 2004 (has links) (PDF)
Thesis (M.S. in Operations Research)--Naval Postgraduate School, Sept. 2004. / Thesis advisor(s): W. Matthew Carlyle. Includes bibliographical references (p. 67-68). Also available online.
17

Requirements for digitized aircraft spotting (Ouija) board for use on U.S. Navy aircraft carriers /

Thate, Timothy J. Michels, Adam S. January 2002 (has links) (PDF)
Thesis (M.S. in Information Systems Management)--Naval Postgraduate School, September 2002. / Thesis advisor(s): Alex Bordetsky, Glenn Cook. Includes bibliographical references. Also available online.
18

Metrics of METOC forecast performance and operational impacts on carrier strike operations

Callahan, Jeremy. January 2006 (has links) (PDF)
Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, September 2006. / Thesis Advisor(s): Tom Murphree, Rebecca Stone. "September 2006." Includes bibliographical references (p. 61-62). Also available in print.
19

Uptake of liposomes into bacterial cells

Oidu, Benjamin January 2013 (has links)
Liposomes are small phospholipid vesicles that have been widely investigated as drug carriers for the delivery of therapeutic agents. A variety of liposome formulations are presently under clinical trial exploration, while others have already been approved for clinical use. The aim of this study was to optimize liposome uptake into bacterial cells. Both gram-positive and gram-negative bacteria were used in the study as well as Candida albicans.Response surface methodology (RSM) using a central composite design (CCD) model was used to optimize liposomal formulations of carboxyfluorescien (CF) for each of the three microbes, and also the three microbes in combination namely; Staphylococcus aureus (Sa), Escherichia coli (Ec) and Candida albicans (Ca). Percentage of CF encapsulated and CF increase in Uptake were investigated with respect to two independent variables that were, cholesterol (CHOL) and stearylamine (SA) content. Design Expert 8 was used for the purpose of finding the combination of independent variables that would yield an optimal formulation for each microbe and the three microbes in combination. The model selected by the software managed to reasonably correlate the predicted models to the experimental data. Encapsulation of carboxyfluorescien (CF) into a liposome formulation enhanced its uptake by Staphylococcus aureus and Escherichia coli as well as Candida albicans. This was evident in the increase in CF uptake when the uptake rate of free CF was compared with that of liposomal CF.
20

The role and characteristics of private (not for reward )road transport operators in the South African freight market

Bierman, Nina-Lize 17 October 2008 (has links)
M.Comm. / Statistics on private road freight transportation services (not for reward) (defined as: “a business’s own vehicles that are used to transport its own products to its own customers”) are very limited in South Africa. Statistics South Africa’s (SSA) research focuses on road freight carriers for reward and excludes the data on private (not for reward) carriers. The CSIR in 2004 published a report entitled Second Annual State of Logistics Survey for South Africa. The focus of this study was on land freight transport, i.e. road and rail. Maritime, air and pipeline volumes were not included in this study’s scope. Therefore, the number of studies investigating the private (not for reward) road freight market and even the total freight market in South Africa is limited to the above-mentioned two sources and the Rand Afrikaans University’s (RAU) 1991-study (published in 1993), entitled Freight Transport Survey. / Prof. J. Walters Prof. G. Prinsloo.

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