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  • 1
    Electronic Resource
    Electronic Resource
    Guest editor's foreword special issue on parallel computing (1996)
    Springer
    Algorithmica 15 (1996), S. 103-103 
    Details
    ISSN: 1432-0541
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01941683
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  • 2
    Electronic Resource
    Electronic Resource
    Efficient parallel algorithms for graph problems (1990)
    Springer
    Algorithmica 5 (1990), S. 43-64 
    Details
    ISSN: 1432-0541
    Keywords: Biconnected components ; Connected components ; Minimum spanning trees ; Parallel algorithms ; Parallel processing ; PRAM ; Radix sort ; Spanning trees ; Tree computations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract We present an efficient technique for parallel manipulation of data structures that avoids memory access conflicts. That is, this technique works on the Exclusive Read/Exclusive Write (EREW) model of computation, which is the weakest shared memory, MIMD machine model. It is used in a new parallel radix sort algorithm that is optimal for keys whose values are over a small range. Using the radix sort and known results for parallel prefix on linked lists, we develop parallel algorithms that efficiently solve various computations on trees and “unicycular graphs.” Finally, we develop parallel algorithms for connected components, spanning trees, minimum spanning trees, and other graph problems. All of the graph algorithms achieve linear speedup for all but the sparsest graphs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01840376
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  • 3
    Electronic Resource
    Electronic Resource
    On the depth complexity of formulas (1979)
    Springer
    Theory of computing systems 13 (1979), S. 301-322 
    Details
    ISSN: 1433-0490
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract The problem of minimizing the depth of formulas by equivalence preserving transformations is formalized in a general algebraic setting. For a particular algebraic system ∑0 specific methods of a dynamic programming nature are developed for proving lower bounds on depth. Such lower bounds for ∑0 automatically imply the same results for the systems of (i) arithmetic computations with addition and multiplication only, and (ii) computations over finite languages using union and concatenation. The specific lower bounds obtained are (i) depth 2n−o(n) for the permanent, (ii) depth (0.25+o(1))log2 n for the symmetric polynomials and (iii) depth 1.16logn for a problem of formula sizen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01744302
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  • 4
    Electronic Resource
    Electronic Resource
    The influence of the growth retardant CCC on endogenous gibberellin in cucumber seedlings (1975)
    Springer
    Planta 125 (1975), S. 73-75 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The gibberellin content of cucumber (Cucumis sativus L.) roots and green organs from (2-chloroethyl) trimethylammonium chloride (CCC)-treated seeds was equal to or even higher than in the water controls. The main difference between control and growth retardant-treated seedlings was expressed in the differential distribution of the endogenous gibberellin between its free and bound forms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388875
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  • 5
    Electronic Resource
    Electronic Resource
    Carbonic anhydrase activity as an indicator of zinc deficiency in pecan leaves (1983)
    Springer
    Plant and soil 74 (1983), S. 287-289 
    Details
    ISSN: 1573-5036
    Keywords: Carbonic anhydrase ; Carya illinoensis ; Mineral nutrition ; Zinc deficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An extraction method was developed to examine if enzymatic reaction of carbonic anhydrase in pecan (Carya illinoensis (Wang.) K Koch) leaves can replace the ordinary mineral detection tests. By comparing the extracted carbonic anhydrase activity from pecan leaves with lack of zinc and with recommended zinc level, the differences can be easily observed and used for detection of zinc deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02143619
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  • 6
    Electronic Resource
    Electronic Resource
    Identification of sex pheromone components from pheromone gland volatiles of the tomato looper,Plusia chalcites (Esp.) (1987)
    Springer
    Journal of chemical ecology 13 (1987), S. 991-1003 
    Details
    ISSN: 1573-1561
    Keywords: Plusia chalcites ; Lepidoptera ; Noctuidae ; sex pheromone ; identification ; flight-tunnel bioassay ; (Z)-7-dodecenyl acetate ; (Z)-9-dodecenyl acetate ; (Z)-9-tetradecenyl acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The sex pheromone glands ofPlusia chalcites release, dodecyl acetate, (Z)-7-dodecenyl acetate, (Z)-9-dodecenyl acetate, 11-dodecenyl acetate, (Z)-8-tridecenyl acetate, and (Z)-9-tetradecenyl acetate. A combination of capillary GC, GC-MS, and dimethyl disulfide derivatization enabled a rigorous identification of all these compounds, some of which were previously found in gland extracts. Bioassays in a flight tunnel showed that a ternary blend of (Z)-7-dodecenyl acetate, (Z)-9-dodecenyl acetate, and (Z)-9-tetradecenyl acetate elicited directed flights from 85 to 100% of the males tested and elicited copulation attempts, at the end of the flights, from 44 to 74% of the males tested. This blend was equal in activity to the natural gland extract. Addition of the other acetates had only a slight influence on the activity of this mixture. Substitution of either (Z)-9-dodecenyl acetate or (Z)-9-tetradecenyl acetate in this blend by 11-dodecenyl acetate gave two ternary mixtures which also elicited high levels of courtship activity, almost as high as that of the original blend. Addition of (Z)-7-dodecenyl alcohol inhibited almost totally the flight activity of males.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020533
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  • 7
    Electronic Resource
    Electronic Resource
    Conceptually enhanced simulations: A computer tool for science teaching (1993)
    Springer
    Journal of science education and technology 2 (1993), S. 373-388 
    Details
    ISSN: 1573-1839
    Keywords: Simulations ; conceptual change ; computers ; science education ; flotation ; density
    Source: Springer Online Journal Archives 1860-2000
    Topics: Natural Sciences in General , Technology
    Notes: Abstract In this paper, we consider a way computer simulations can be used to address the problem of teaching for conceptual change and understanding. After identifying three levels of understanding of a natural phenomenon (concrete, conceptual, and metaconceptual) that need to be addressed in school science, and classifying computer model systems and simulations more generally in terms of the design choices facing the programmer, we argue that there are ways to design computer simulations that can make them more powerful than laboratory models. In particular, computer simulations that provide an explicit representation for a set of interrelated concepts allow students to perceive what cannot be directly observed in laboratory experiments: representations for the concepts and ideas used for interpreting the experiment. Further, by embedding the relevant physical laws directly into the program code, these simulations allow for genuine discoveries. We describe how we applied these ideas in developing a computer simulation for a particular set of purposes: to help students grasp the distinction between mass and density and to understand the phenomenon of flotation in terms of these concepts. Finally, we reflect on the kinds of activities such conceptually enhanced simulations allow that may be important in bringing about the desired conceptual change.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694526
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  • 8
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    Structural and Exchange Components in Processes of Neighbourhood Change: A Social Mobility Approach (2018)
    Springer
    Details
    Publication Date: 2018-01-19
    Print ISSN: 1874-463X
    Electronic ISSN: 1874-4621
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by Springer
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  • 9
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    Efficient parallel algorithms for graph problems (1990)
    Springer
    Details
    Publication Date: 1990-06-01
    Print ISSN: 0178-4617
    Electronic ISSN: 1432-0541
    Topics: Computer Science , Mathematics
    Published by Springer
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  • 10
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    Guest editor's foreword special issue on parallel computing (1996)
    Springer
    Details
    Publication Date: 1996-02-01
    Print ISSN: 0178-4617
    Electronic ISSN: 1432-0541
    Topics: Computer Science , Mathematics
    Published by Springer
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