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  • AIR TRANSPORTATION AND SAFETY  (5)
  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (3)
  • 1985-1989  (8)
  • 1955-1959
  • 1
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    Investigation of air transportation technology at Massachusetts Institute of Technology, 1986 (1988)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: There were three areas of research sponsored in the Flight Transportation Lab. at MIT under the Joint University Research Program during 1986. The first was the completion of efforts investigating the possibility of using Loran-C for final approach guidance to a runway; the second is a preliminary exploration of the application of automated speech recognition in Air Traffic Control; the third is a continuation of a series of research topics into aircraft icing problems.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA, Langley Research Center, Joint University Program for Air Transportation Research, 1986; p 3-6
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Investigation of air transport technology at Massachusetts Institute of Technology, 1983 (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The limitations in providing both centerline and altitude guidance for runways in good Loran-C signal coverage were determined. The high data rate (10/sec) and good repeatable accuracy of Loran-C indicate that it will be possible to provide the pilot with continuous, cross pointer display of guidance information similar to that provided by ILS/MLS, at least when good signal-to-noise ratios and good geometry from Loran-C Lines of Position (LOP) exist at the airport.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA Langley Research Center Joint University Program for Air Transportation Research, 1983; p 3-9
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Investigation of air transportation technology at Massachusetts Institute of Technology, 1985 (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Two areas of research are discussed, an investigation into runway approach flying with Loran C and a series of research topics in the development of experimental validation of methodologies to support aircraft icing analysis. Flight tests with the Loran C led to the conclusion that it is a suitable system for non-precision approaches, and that time-difference corrections made every eight weeks in the instrument approach plates will produce acceptable errors. In the area of aircraft icing analysis, wind tunnel and flight test results are discussed.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA, Langley Research Center, Joint University Program for Air Transportation Research, 1985; p 3-6
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Investigation of air transportation technology at Massachusetts Institute of Technology, 1984 (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Three projects sponsored by the Joint University Program at MIT are summarized. Two projects were focussed on the potential application of Loran-C in flying nonprecision approaches to general aviation runways, and the third project involved research on aircraft icing. In one Loran-C project, Aircraft Approach Guidance Using Relative Loran-C Navigation, the concept was flight tested. It used the difference in TD's from those of the touchdown point to simplify and speed navigation computer processing and took advantage of the short term accuracy of less than 100 feet for Loran-C. The goal of the project, Probabilistic Modelling of Loran-C Error for Nonprecision Approaches, was to develop a mathematical model which would predict the probability that an approach flown to a runway with a particular Loran-C receiver would fall within a given standard. The Aircraft Icing project focussed on measurement of droplet trajectories and droplet impingement/runback characteristics and measurement of real time ice accretion using ultrasonic pulse echo techniques.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA. Langley Research Center Joint University Program for Air Transportation Research, 1984; p 3-7
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Speech variability effects on recognition accuracy associated with concurrent task performance by pilots (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: In the present study of the responses of pairs of pilots to aircraft warning classification tasks using an isolated word, speaker-dependent speech recognition system, the induced stress was manipulated by means of different scoring procedures for the classification task and by the inclusion of a competitive manual control task. Both speech patterns and recognition accuracy were analyzed, and recognition errors were recorded by type for an isolated word speaker-dependent system and by an offline technique for a connected word speaker-dependent system. While errors increased with task loading for the isolated word system, there was no such effect for task loading in the case of the connected word system.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Selecting cockpit functions for speech I/O technology (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A general methodology for the initial selection of functions for speech generation and speech recognition technology is discussed. The SCR (Stimulus/Central-Processing/Response) compatibility model of Wickens et al. (1983) is examined, and its application is demonstrated for a particular cockpit display problem. Some limits of the applicability of that model are illustrated in the context of predicting overall pilot-aircraft system performance. A program of system performance measurement is recommended for the evaluation of candidate systems. It is suggested that no one measure of system performance can necessarily be depended upon to the exclusion of others. Systems response time, system accuracy, and pilot ratings are all important measures. Finally, these measures must be collected in the context of the total flight task environment.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Investigation of technology needs for avoiding helicopter pilot error related accidents (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Pilot error which is cited as a cause or related factor in most rotorcraft accidents was examined. Pilot error related accidents in helicopters to identify areas in which new technology could reduce or eliminate the underlying causes of these human errors were investigated. The aircraft accident data base at the U.S. Army Safety Center was studied as the source of data on helicopter accidents. A randomly selected sample of 110 aircraft records were analyzed on a case-by-case basis to assess the nature of problems which need to be resolved and applicable technology implications. Six technology areas in which there appears to be a need for new or increased emphasis are identified.
    Keywords: AIR TRANSPORTATION AND SAFETY
    Type: NASA-CR-3895 , NAS 1.26:3895 , ORI-TR-2384
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Versatile simulation testbed for rotorcraft speech I/O system design (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A versatile simulation testbed for the design of a rotorcraft speech I/O system is described in detail. The testbed will be used to evaluate alternative implementations of synthesized speech displays and speech recognition controls for the next generation of Army helicopters including the LHX. The message delivery logic is discussed as well as the message structure, the speech recognizer command structure and features, feedback from the recognizer, and random access to controls via speech command.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 861661 , Aerospace Behavioral Engineering Technology Conference; Oct 13, 1986 - Oct 16, 1986; Long Beach, CA; United States
    Format: text
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    NASA TECHNICAL REPORTS
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