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  • 1990-1994  (2)
  • 1965-1969  (1)
  • Chemistry  (2)
  • Area  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Optimal tradeoffs for addition on systolic arrays (1991)
    Springer
    Algorithmica 6 (1991), S. 49-71 
    Details
    ISSN: 1432-0541
    Keywords: Addition ; Area ; Time ; VLSI circuits ; Input/output ports ; Boundary layouts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The complexity of adding twon-bit numbers on a two-dimensional systolic array is investigated. We consider different constraints on the systolic array, including: whether or not the input and output ports lie on the periphery of the array, constraints placed on the arrival and departure times of inputs and outputs . For all combinations of the above constraints, we obtain optimal tradeoffs among the resources of area, pipeline delay, and worst-case time. It turns out that there is a subtle interplay among the constraints and some of our results seem counterintuitive. For instance, we show that allowing more-significant bits to arrive earlier than less-significant bits can speed up addition by a factor of logn. We also show that multiplexing can often result in a smaller array. On the other hand, we show that some known results, such as Chazelle and Monier's bounds for arrays that have input/output ports on the perimeter, also hold in less constrained models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01759034
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of δ13C values of sedimentary straight chain and cyclic alcohols by gas chromatography/isotope ratio mass spectrometry (1991)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 20 (1991), S. 641-646 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Improved measurement of δ13C values of n-alcohols and sterols by gas chromatography/isotope ratio mass spectrometry is shown after their derivatization to silyl ethers. A method of correcting for the effects of the added silyl carbon atoms on the measurements of the silylated derivatives is also described and an application of the method for providing information on the sources of lacustrine n-alcohols and sterols is given.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200201009
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Poly(norbornene): Tensile and dynamic-mechanical properties (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 12 (1968), S. 1751-1754 
    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: The tensile and dynamic mechanical properties of poly(norbornene), prepared through ring-opening polymerization, were studied. Tensile strength and extensibility increased, while Young's modulus decreased with increasing molecular weight and with increasing content of trans relative to cis unsaturation. The damping factor Delta; was dependent on molecular weight only for the lower molecular weight samples. The out-of-phase modulus E″ and the damping factor decreased as the trans/cis ratio increased.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1968.070120722
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    Paper (German National Licenses)
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