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  • 1
    Electronic Resource
    Electronic Resource
    Karyotype of two species of wasps of the genusPolistes (Polistinae, Vespidae, Hymenoptera) (1986)
    Springer
    Insectes sociaux 33 (1986), S. 142-148 
    Details
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume Le nombre de chromosomes et le caryotype de deux espèces de guêpes du genrePolistes ont été déterminés. Il a été développé une technique comprenant le traitement préalable à la colchicine et au citrate de sodium, lequel permet une identification plus précise des chromosomes. Les espècesPolistes (Aphanilopterus) simillimus avec n=28, 2n=56 chromosomes etPolistes (Aphanilopterus) versicolor versicolor avec n=31, 2n=62 chromosomes ont montré des caryotypes bien caractéristiques.
    Notes: Summary The chromosome number and karyotype of two wasp species of the genusPolistes were determined by a technique involving colchicine and sodium citrate pre-treatment, which permitted a more precise chromosome identification. The speciesPolistes (Aphanilopterus) simillimus, with n=28, 2n=56 chromosomes, andPolistes (Aphanilopterus) versicolor versicolor, with n=31, 2n=62 chromosomes, showed sharply characteristic individual karyotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02224594
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  • 2
    Electronic Resource
    Electronic Resource
    Cauchy distribution, intensity statistics and phases of reflections from crystal planes (1989)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 45 (1989), S. 314-319 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Recently near-Gaussian distributions have been of much interest in the field of crystallographic statistics. In the present work, expressions for a truncated Cauchy distribution corresponding to acentric and centric cases have been derived. Expressions for P+, the probability of sign relations for centric crystals, and for Pφ, the probability of the tangent relationship for acentric crystals, have been derived on the basis of the Cauchy distribution of structure factor components. Theoretical N(Z) curves for centric and acentric Cauchy distributions have been compared with those for acentric, centric and bicentric Gaussian distributions. The N(Z) curve for the Cauchy acentric distribution follows closely that for the Gaussian acentric up to Z = 0.5. It then takes an upward turn and surpasses the Gaussian bicentric curve at high Z values. A similar trend is shown by the N(Z) curve for the Cauchy centric distribution after being approximately intermediate between the Gaussian centric and bicentric cases up to Z = 0.5. The results of P+ and Pφ have been compared with some known crystal data and the agreement is quite satisfactory for the cases studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767388013194
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  • 3
    Electronic Resource
    Electronic Resource
    An appraisal of the performance of the MMSC subgraph generation algorithm on a Cyber System 170/720 (1986)
    Springer
    Computing 37 (1986), S. 365-370 
    Details
    ISSN: 1436-5057
    Keywords: Maximal minimally strongly connected (MMSC) subgraphs ; cliques ; performance ; complexities ; cluster analysis ; maximal compatibles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung In einer kürzlich erfolgten Veröffentlichung von Daset al. wurde ein Algorithmus zur Erzeugung maximaler minimal stark zusammenhängender (MMSC) Untergraphen oder Cliquen in ungerichteten Graphen vorgeschlagen. Dieser Algorithmus basiert auf einer Verfeinerung der Technik der sukzessiven Aufspaltung, der von Paull und Unger eingeführt wurde. In der vorliegenden Arbeit wird das Leistungsverhalten dieses Algorithmus bei Implementierung in FORTRAN IV mit dem System Cyber 170/720 untersucht.
    Notes: Abstract An algorithm for generating maximal minimally strongly connected (MMSC) subgraphs or cliques in undirected graphs has been suggested by Daset al. in a recent paper. The proposed algorithm is based on a refinement of the technique of successive splitting described by Paull and Unger in the determination of maximal compatibles of states in the context of minimization of incomplete sequential machines. The present paper discusses the performance of the aforementioned subgraph generation algorithm in an implementation on Cyber System 170/720 using FORTRAN IV, in particular reference to cluster analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02251094
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  • 4
    Electronic Resource
    Electronic Resource
    Electrowinning of cobalt from a sulphate bath containing H3BO3 and NaF (1987)
    Springer
    Journal of applied electrochemistry 17 (1987), S. 675-683 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Electrowinning of cobalt from a sulphate bath containing Na2SO4, NaF and H3BO3 individually and H3BO3 in combination with NaF and Na2SO4 was studied. From the preliminary study it was observed that a sulphate bath containing both NaF and H3BO3 gave the best results. The effects of various parameters, namely NaF, H3BO3 and cobalt concentrations, current density, bath temperature, bath pH, etc. on cathode current efficiency and on the nature of the deposit were studied. The results indicate that both H3BO3 and NaF in the sulphate bath contribute towards higher current efficiency and better deposit in the elecrowinning of cobalt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01007801
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  • 5
    Electronic Resource
    Electronic Resource
    Occurrence of krypton and xenon in the Bakreswar thermal spring gases (1989)
    Springer
    Naturwissenschaften 76 (1989), S. 520-521 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00374125
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  • 6
    Electronic Resource
    Electronic Resource
    A biochemical analysis of Ak molecules from mutant antigen presenting cell lines (1986)
    Springer
    Immunogenetics 23 (1986), S. 121-125 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00377972
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  • 7
    Electronic Resource
    Electronic Resource
    Parallelization of the Volterra algorithm for linear optimal open loop control (1989)
    Springer
    Computational mechanics 5 (1989), S. 305-320 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract If and when the time variation of optimal controls of a linear system subject to known forces is required, they can be obtained by the computationally advantageous open loop Volterra formulation (as opposed to the costlier Riccati formulation). For the computation, the Volterra equation is discretized in the time domain via such schemes as trapezoidal integration or SIMPSON's rule and the resulting linear system is solved to obtain the control vector values at discrete time points within the control timeT. In the case of very large order systems (degrees of freedom ∼ 5000) a parallel technique is absolutely neccessary, and this paper enunciates an efficient parallel stratagem with efficiencies in the range of 80% and 100%. The algorithm uses ‘s + 1’ processors, ‘s’ being the number of intervals within the control timeT, and typically each processor characterizes one time point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01046948
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  • 8
    Electronic Resource
    Electronic Resource
    Thickness dependence of Curie temperature of MnBi thin films (1985)
    Springer
    Journal of materials science 4 (1985), S. 1203-1207 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00723459
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  • 9
    Electronic Resource
    Electronic Resource
    Mechanical behaviour of rapidly solidified aluminium-silicon ribbon-polyester composites (1986)
    Springer
    Journal of materials science 5 (1986), S. 823-826 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01730103
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  • 10
    Electronic Resource
    Electronic Resource
    Characterization of rapidly solidified aluminium-silicon alloy (1987)
    Springer
    Journal of materials science 22 (1987), S. 3173-3177 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A metallographic investigation of as-cast LM-13 aluminium-silicon alloy, solidified at different cooling rates (using permanent moulds or a single-roll melt spinner), is presented with special reference to the modification of eutectic silicon. and the refinement of primary aluminium. The refinement of microstructure with the increase in cooling rate is mainly attributed to the limited growth kinetics of the nucleated phase during solidification. The rapidly solidified ribbon was heat-treated in order to determine the microstructural stability at high temperature. The tensile strength, percentage elongation and hardness values of as-solidified and heat-treated samples correlate well with the changes in the microstructure observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161179
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