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  • Chemistry  (1)
  • MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT  (1)
  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Selenium-77 chemical shifts of cyclodiphosphazane selenides (1979)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 12 (1979), S. 391-392 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Isomeric cyclodiphosphazane selenides, R(X)P(NBu1)2P(Y)R (R=OMe or NMe2, X=Se, Y=lone pair; R=OMe or NMe2, X=Y=Se) display large differences (34-122 ppm) in 77Se chemical shift. The 77Se shifts of these and related amino derivatives are well to low field of the 77Se shifts of analogous acyclic phosphorus selenides.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270120615
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The development of a six degree-of-constraint robot performance evaluation test (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A remote manipulator performance evaluation test was developed to test certain tool mating configurations not possible with the standard peg-in-hole type of test. The test attempted to evaluate robot manipulator performance over a full range of six degrees of freedom of motion between a tool and its intended receptacle. The test consists primarily of four different tool geometries and three different receptacle geometries which provide for a progressive reduction in the degrees of freedom of motion, and a progressive increase in the degrees of constraint (DOC) over motion, between the tool and the receptacle. The manipulation times of actual tools and couplings would be predicted by the times for the test tool most like it geometrically. In addition, the influence of four different transmission delays was tested. The results indicate that tool manipulation time can vary by a factor of about four depending on the degrees of constraint over final tool positioning.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: MIT Proc., 13th Ann. Conf. on Manual Control; p 289-292
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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