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  • 1
    Electronic Resource
    Electronic Resource
    TheGr X n/G n/∞ system: System size (1991)
    Springer
    Queueing systems 8 (1991), S. 323-356 
    Details
    ISSN: 1572-9443
    Keywords: Infinite server ; batch arrival ; Markov renewal input ; customer dependence ; analytical result
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract An important property of most infinite server systems is that customers are independent of each other once they enter the system. Though this non-interacting property (NIP) has been instrumental in facilitating excellent results for infinite server systems in the past, the utility of this property has not been fully exploited or even fully recognized. This paper exploits theNIP by investigating a general infinite server system with batch arrivals following a Markov renewal input process. The batch sizes and service times depend on the customer types which are regulated by the Markov renewal process. By conditional approaches, analytical results are obtained for the generating functions and binomial moments of both the continuous time system size and pre-arrival system size. These results extend the previous results on infinite server queues significantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02412259
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  • 2
    Electronic Resource
    Electronic Resource
    Queue lengths in the GIX/MR/∞ service system (1996)
    Springer
    Queueing systems 22 (1996), S. 129-144 
    Details
    ISSN: 1572-9443
    Keywords: Infinite server ; batch arrival ; batch service ; analytical results
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract Service systems with queueing often have both batch arrivals and batch services. This paper focuses on the number of busy servers and waiting customers in theGI X/MR/∞ system. For the number of busy servers, we obtain a recursive relation for the partial binomial moments in terms of matrices and explicit expressions for the marginal binomial moments. Special cases are also discussed to provide a more heuristic understanding of the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01159397
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  • 3
    Electronic Resource
    Electronic Resource
    The service system M/M R /∞ with impatient customers (1987)
    Springer
    Queueing systems 2 (1987), S. 363-372 
    Details
    ISSN: 1572-9443
    Keywords: Infinite server ; impatient customers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract An infinite server queue is considered where customers have a choice of individual service or batch service. Transient results have been obtained for the first two moments of the system size distribution. Waiting time distribution is important in system evaluation and steady state results are obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01150047
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  • 4
    Electronic Resource
    Electronic Resource
    Ring A conformation in steroids. 2For Part I, see reference 13. - NMR study of C-2 monomethyl- and dimethyl-substituted 5α-androstan-3-ones (1987)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 25 (1987), S. 730-733 
    Details
    ISSN: 0749-1581
    Keywords: 1H NMR ; 13C NMR monomethyl/dimethyl 5α-androstan-3-ones ; Steroid ; Ring A conformation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ring A proton shifts and couplings and 13C shifts of all carbons are given for 17β-acetoxy-2α-methyl- and 17β-methoxy-2β-methyl-5α-androstan-3-one and 2,2-dimethyl-17β-methoxy-5α-androstan-3-one. It was concluded that the 2β-methyl derivative exists with ring A in a regular chair conformation while the 2β-methyl derivative exists with ring A in an inverted boat conformation with C-2 and C-5 at the bow/stern positions. The data for 2,2-dimethyl-17β-methoxy-5α-androstan-3-one suggest an equilibrium of these two conformers.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260250814
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  • 5
    Electronic Resource
    Electronic Resource
    Ring a conformation in steroids. 3For Part 1, see Ref. 30; For Part 2, see Ref. 31. - Cyclosteroids and cyclopropanosteroids (1995)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 33 (1995), S. 529-540 
    Details
    ISSN: 0749-1581
    Keywords: steroids ; 1H NMR ; 13C NMR ; coupling constants ; conformational analysis ; 1D TOCSY ; NOE ; cyclosteroids ; cyclopropanosteroids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Proton and carbon NMR data are provided for 21 ring A and ring B cyclosteroids and cyclopropano (or methylene) steroids. Shift assignments were made using standard 2D NMR techniques, while ring A proton subspectra were extracted with a 1D TOCSY experiment. Coupling constants were obtained from iterative spin system simulation of these sub-spectra. Ring A conformations were determined from the two- and three-bond proton-proton couplings and NOE measurements. The utility and limitations of extended Karplus-type equations, the effect of cyclopropyl groups on vicinal and geminal couplings and cyclopropane-induced chemical shifts are discussed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260330707
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