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  • 1
    Electronic Resource
    Electronic Resource
    Glass-rubber transition behavior and compatibility of polymer pairs: Poly(ethyl acrylate) and poly(methyl methacrylate) (1970)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 14 (1970), S. 73-78 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A series of interpenetrating polymer networks were prepared containing PMMA and PEA as their two components. Corresponding telomer mixtures and random copolymers were also prepared for comparison purposes. The glass-rubber transition studies were made via shear modulus and dilatometric measurements. The results indicate one very broad transition for the IPN's rather than two transitions expected for incompatible polymer pairs. An interpretation based on the compatibility or near-compatibility of the PEA/PMMA pair is offered.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1970.070140108
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Role of man in flight experiment payloads, phase 1 (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The identification of required data for studies of Spacelab experiment functional allocation, the development of an approach to collecting these data from the payload community, and the specification of analytical methods necessary to quantitatively determine the role of man in specific Spacelab experiments are presented. A generalized Spacelab experiment operation sequence was developed, and the parameters necessary to describe each signle function in the sequence were identified. A set of functional descriptor worksheets were also drawn up. The methodological approach to defining the role of man was defined as a series of trade studies using a digial simulation technique. The tradeoff variables identified include scientific crew size, skill mix, and location. An existing digital simulation program suitable for the required analyses was identified and obtained.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-120398
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Earth orbital teleoperator system man-machine interface evaluation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The teleoperator system man-machine interface evaluation develops and implements a program to determine human performance requirements in teleoperator systems.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-139598 , H-4-1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Teleoperator docking simulation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A simulation study is described of the translation, station keeping and final approach segments of the teleoperator implemented at MSFC. An effort is made to identify the teleoperator visual system design parameters which influence operator performance and to determine human factors design requirements for free flying teleoperators.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-120220 , H-4-4
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Manipulator system man-machine interface evaluation program (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Application and requirements for remote manipulator systems for future space missions were investigated. A manipulator evaluation program was established to study the effects of various systems parameters on operator performance of tasks necessary for remotely manned missions. The program and laboratory facilities are described. Evaluation criteria and philosophy are discussed.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-120218 , H-4-3
    Format: application/pdf
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  • 6
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    Man-systems evaluation of moving base vehicle simulation motion cues (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A motion cue investigation program is reported that deals with human factor aspects of high fidelity vehicle simulation. General data on non-visual motion thresholds and specific threshold values are established for use as washout parameters in vehicle simulation. A general purpose similator is used to test the contradictory cue hypothesis that acceleration sensitivity is reduced during a vehicle control task involving visual feedback. The simulator provides varying acceleration levels. The method of forced choice is based on the theory of signal detect ability.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA-CR-120706
    Format: application/pdf
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  • 7
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    Optical range and range rate estimation for teleoperator systems (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Range and range rate are crucial parameters which must be available to the operator during remote controlled orbital docking operations. A method was developed for the estimation of both these parameters using an aided television system. An experiment was performed to determine the human operator's capability to measure displayed image size using a fixed reticle or movable cursor as the television aid. The movable cursor was found to yield mean image size estimation errors on the order of 2.3 per cent of the correct value. This error rate was significantly lower than that for the fixed reticle. Performance using the movable cursor was found to be less sensitive to signal-to-noise ratio variation than was that for the fixed reticle. The mean image size estimation errors for the movable cursor correspond to an error of approximately 2.25 per cent in range suggesting that the system has some merit. Determining the accuracy of range rate estimation using a rate controlled cursor will require further experimentation.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: Human Factors Society, Annual Meeting; Oct 15, 1974 - Oct 17, 1974; Huntsville, AL
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Role of man in flight experiment payloads, phase 1, appendices 1 and 2 (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The individual task durations are calculated in a series of time line realization problems, and a functional requirements data collection technique, designed to accommodate the data requirements for Spacelab payloads, is presented.
    Keywords: BIOTECHNOLOGY
    Type: NASA-CR-120398-APP-1-2
    Format: application/pdf
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  • 9
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    Test report, earth orbiter teleoperator visual system evaluation program (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Work carried out to identify human performance requirements for remotely manned system is reported. Specifically, an evaluation was made of the human visual system. Data cover distance estimation 4, solid target alignment 2, motion detection 1, and motion detection 2.
    Keywords: SPACE SCIENCES
    Type: NASA-CR-120219 , H-4-2
    Format: application/pdf
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