• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 880
  • 292
  • 102
  • 75
  • 69
  • 44
  • 25
  • 12
  • 11
  • 10
  • 9
  • 7
  • 7
  • 7
  • 7
  • Tagged with
  • 1952
  • 407
  • 372
  • 296
  • 242
  • 223
  • 182
  • 153
  • 143
  • 134
  • 125
  • 125
  • 120
  • 115
  • 114
  • 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.
121

Development of a New IRIG Standard Flight Recorder

Russ, Roger, Graham, Mark 10 1900 (has links)
International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada / An IRIG standard flight recorder has been developed that is based on half-inch helical scan technology. The recorder was developed by combining the data channel of existing ground-based recording systems with transport technology used in both flight test and operational fighter aircraft environments. The design goal was to achieve cross play compatibility with the defined IRIG 106.6 tape format. Significant margins were provided in the design to maintain compatibility with tapes recorded in fighter aircraft environments. Operation at up to 50,000 feet, a temperature range of -40EC to +55EC, and vibration sources to Mil Spec 5400T are requirements in this environment. How these technical problems were overcome during the development of this recorder is addressed in this paper.
122

The Subminiature Flight Safety System

Woodard, Tracy, Dehmelt, Chris 10 1900 (has links)
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / Weapons platform testing and monitoring have historically consisted of custom telemetry and flight safety system solutions tailored to the requirements (including Title 10 Mandates) and size constraints of individual platforms. The size of these individual components of these systems has necessitated that warhead replacement to facilitate insertion of these units to support test and evaluation activities. Currently there are no products available to meet these requirements in a miniaturized and modular package. L-3 Communications Telemetry East (L-3 TE) has developed an extensive background in providing solutions to gather vital missile and target information over the last several decades. Under the auspices of Eglin AFB, L-3 TE is leading a multi-disciplinary team to design and develop the Subminiature Flight Safety System (SFSS) to support existing and new weapons applications. SFSS is a universal, small, and low cost redundant flight termination system (FTS) that incorporates encoding, processing and TSPI capacities that provides critical health/safety/welfare monitoring and allows for highly efficient telemetering of all weapon application and FTS data. The SFSS is intended as a solution to allow weapon system developers, test agencies, and range safety officers the ability to track, monitor, and if necessary, terminate all types of weapon systems. It is designed to interface with newly developed weapon systems, while providing backward compatibility to meet existing requirements with minimal modifications to the weapon. The SFSS components are intended to significantly reduce the cost and improve the quality of test support by providing a highly integrated solution that minimizes physical intrusion into weapon systems, by eliminating the need for warhead removal. In addition, a common hardware platform will reduce overall system cost of acquisition and maintenance to the government, a key element in today's world of stressed budgets.
123

Design Considerations for a Launch Vehicle Development Flight Instrumentation System

Johnson, Martin L., Crawford, Kevin 10 1900 (has links)
ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / When embarking into the design of a new launch vehicle, engineering models of expected vehicle performance are always generated. While many models are well established and understood, some models contain design features that are only marginally known. Unfortunately, these analytical models produce uncertainties in design margins. The best way to answer these analytical issues is with vehicle level testing. The National Aeronautics and Space Administration respond to these uncertainties by using a vehicle level system called the Development Flight Instrumentation, or DFI. This DFI system can be simple to implement, with only a few measurements, or it may be a sophisticated system with hundreds of measurement and video, without a recording capability. From experience with DFI systems, DFI never goes away. The system is renamed and allowed to continue, in most cases. Proper system design can aid the transition to future data requirements. This paper will discuss design features that need to be considered when developing a DFI system for a launch vehicle. It will briefly review the data acquisition units, sensors, multiplexers and recorders, telemetry components and harnessing. It will present a reasonable set of requirements which should be implemented in the beginning of the program in order to start the design. It will discuss a simplistic DFI architecture that could be the basis for the next NASA launch vehicle. This will be followed by a discussion of the "experiences gained" from a past DFI system implementation, such as the very successful Ares I-X test flight. Application of these design considerations may not work for every situation, but they may direct a path toward success or at least make one pause and ask the right questions.
124

Identification process of flight attendants: a discursive pattern analysis.

January 2004 (has links)
Liu Kit Hang Katie. / Thesis submitted in: December 2003. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2004. / Includes bibliographical references (leaves 111-117). / Abstracts in English and Chinese. / Chapter Chapter 1 --- Introduction: Flight attendants in Hong Kong --- p.1 / Research Objective --- p.1 / Flight Attendants of Samsara Airways --- p.2 / Chapter Chapter 2 --- "Literature Review: Identification, Socialization, Internalization" --- p.4 / Conceptualization Identity and Identification --- p.4 / Organizational Socialization --- p.8 / Internalization --- p.12 / Previous studies on flight attendants and a critique on emotional labor --- p.15 / Chapter Chapter 3 --- Methodology --- p.29 / Conceptual Framework --- p.29 / Research Methods --- p.31 / Major Argument and Outline of Paper --- p.35 / Chapter Chapter 4 --- To Be the salient ONE: competition among identities --- p.37 / Discursive Resources prior to joining the company --- p.37 / Border Crossing: when an outsider becomes an insider --- p.41 / Chapter Chapter 5 --- Discursive Tactics in molding a ´بFlight Attendant´ة --- p.46 / Discourse of Capital --- p.47 / "Production of Knowledge: Rules, Classification System" --- p.47 / "Constructing Lifestyle: Cultural, Economic & Social Capital" --- p.53 / Discourse of Signs --- p.65 / Language: learning the new ´بSamsara´ةEnglish --- p.65 / "Body Management: uniform, body project, grooming, behavior" --- p.66 / Discourse of Space --- p.74 / "Samsara City: workplace, leisure place, consumption place" --- p.74 / Inflight: Mixing up the private and public life --- p.76 / Conformance vs Performance --- p.80 / Chapter Chapter 6 --- Keeping it in shape: Maintenance of identity --- p.86 / "Reward and punishment: Simply the Best, Crew to Crew" --- p.86 / "More Training: ART, AEQ" --- p.88 / "Monitoring System: CPP, TIP" --- p.89 / "InHouse Publications: Samsara World, CCN,JetJet" --- p.90 / Intranet and Internet --- p.93 / Systemizing Identification --- p.96 / Chapter Chapter 7 --- "Conclusion & Discussion: Resistance, Consumerization, Internalization" --- p.99 / Resistance against private and company rules --- p.101 / Consumerization: reciprocal identification and consumerization --- p.105 / Rethinking ´بinternalization´ة --- p.106 / References --- p.111
125

数値流体力学と数値飛行力学の連成に基づく竹とんぼのフライトシュミレーション

河村, 耕平, KAWAMURA, Kohei, 上野, 陽亮, UENO, Yosuke, 中村, 佳朗, NAKAMURA, Yoshiaki 05 July 2008 (has links)
No description available.
126

Stress effects on transfer from virtual environment flight training to stressful flight environments /

McClernon, Christopher K. January 2009 (has links) (PDF)
Thesis (Ph.D. in Modeling, Virtual Environments, and Simulation)--Naval Postgraduate School, June 2009. / "June 2009." Thesis advisor: Michael E. McCauley. Performed by the The Modeling, Virtual Environment, and Simulation Institute at the Naval Postgraduate School, Monterey, CA. "Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Modeling, Virtual Environments, and Simulation from the Naval Postgraduate School, June 2009."--P. iii. Includes bibliographical references. Also available online from the Naval Postgraduate School (NPS), Dudley Knox Library Web site and the DTIC Online Web site.
127

Immunity-based detection, identification, and evaluation of aircraft sub-system failures

Moncayo, Hever Y. January 2009 (has links)
Thesis (Ph. D.)--West Virginia University, 2009. / Title from document title page. Document formatted into pages; contains xiv, 118 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 109-118).
128

Flight performance of bumble bees with wing wear

Haas, Claudia A., University of Lethbridge. Faculty of Arts and Science January 2005 (has links)
This two-part study addressed the foraging flight performance of bumble bees (Bombus spp.) burdened with artificially induced wing wear between fireweed flowers (Chameriion angustifolium). The first part of the study examiend the effects of wing wear and interflower distance on travel time. The second part of the study addressed the effect of mean wing clipping and wing asymmetry on flight biomechanics (flight distance, velocity, acceleration, and deceleration) and flight biomechanics (flight distance, velocity, acceleration, and deceleration) and flight path (displacement from a bee-line). Bees with wing wear flew faster between flowers spaced more sparsely, possibly compromising accuracy in choosing rewarding flowers. Flight biomechanics were relatively unchanged by wing wear. Bees with low wing loss and little asymmetry increased slightly in acceleration and deceleration. Bees with high mean wing loss and high asymmetry flew further and higher between flowers compared to control bees. When the high mean wing loss was symmetrical, bees flew as far and as high as control bees. The results of these studies suggest the resilience of bumble bees to induced wing wear, with little change in flight performance. / 64 leaves ; 29 cm.
129

Development of an attitude heading reference system for an airship /

Bijker, Johan. January 2006 (has links)
Thesis (MScIng)--University of Stellenbosch, 2006. / Bibliography. Also available via the Internet.
130

Lines of flight the design history of the Qantas flight attendants' uniforms /

Black, Prudence Sarah. January 2008 (has links)
Thesis (Ph. D.)--University of Sydney, 2009. / Title from title screen (viewed September 18, 2009) Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Dept. of Gender and Cultural Studies, Faculty of Arts. Degree awarded 2009; thesis submitted 2008. Includes bibliographical references.

Page generated in 0.0195 seconds