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  • 1
    Electronic Resource
    Electronic Resource
    A DECOMPOSITION PROPERTY FOR SIMPLICIAL COMPLEXES AND ITS RELATION TO DIAMETERS AND SHELLINGS (1979)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 319 (1979), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1979.tb32776.x
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  • 2
    Electronic Resource
    Electronic Resource
    Efficient enumeration of the vertices of polyhedra associated with network LP's (1994)
    Springer
    Mathematical programming 63 (1994), S. 47-64 
    Details
    ISSN: 1436-4646
    Keywords: Enumeration ; generation ; listing ; vertex ; polyhedron ; network
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Algorithms are given to list the vertices of polyhedra associated with network linear programs and their duals. Each algorithm has running time which is quadratic in the number of vertices of the polyhedron, and does not require that the polyhedron be either bounded or simple. The algorithms use characterizations of adjacent vertices in network and dual network LP's to perform an efficient traversal of the edge graph of the polyhedron. This contrasts with algorithms for enumerating the vertices of a general polyhedron, all of which have worst-case complexity which is exponential in the number of vertices of the polyhedron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01582058
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  • 3
    Electronic Resource
    Electronic Resource
    Microrheology of crystalline media (1973)
    Springer
    Rheologica acta 12 (1973), S. 177-182 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01635100
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  • 4
    Electronic Resource
    Electronic Resource
    Microrheology of fibrous systems (1973)
    Springer
    Rheologica acta 12 (1973), S. 170-176 
    Details
    ISSN: 1435-1528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit wird die Mikrorheologie einer 2-dimensionalen Faser-Struktur behandelt. Es wird ein mathematisches Modell vorgeschlagen, welches den Aspekt einer atomaren Bindung zwischen den Fasern einbezieht. Es werden in dieser Theorie drei Maßskalen eingeführt sowie eine „Materialfunktion“, welche die geometrischen und rheologischen Eigenschaften der Struktur wiederspiegelt. Erst wird die Deformationskinematik der einzelnen Fasern behandelt, sodann wird die Faser-Faser-Einwirkung mit. Hilfe einer generalisierten Kraft formuliert. Schließlich wird die entsprechende Materialfunktion formuliert, die für die Beschreibung der Reaktion einer Faserstruktur zu einer mechanischen Beanspruchung benötigt wird.
    Notes: Summary The present work is concerned with the microrheology of a 2-dimensional fibrous system. A mathematical model is proposed that contains the aspects of bonding between fibres. The notion of three measuring scales, as well as the concept of a “Material Functional” that reflects the geometrical and rheological properties of the network is introduced in the analysis. The deformation kinematics is treated first for single fibres and then the fibre-fibre interaction by using a generalised force concept is considered. A formal presentation of the material functional required for the characterization of the fibrous network response is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01635099
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  • 5
    Electronic Resource
    Electronic Resource
    The role of Steiner hulls in the solution to Steiner tree problems (1991)
    Springer
    Annals of operations research 33 (1991), S. 537-548 
    Details
    ISSN: 1572-9338
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract ASteiner tree problem on the plane is that of finding a minimum lengthSteiner tree connecting a given setK ofterminals and lying within a given regionR of the Euclidean plane; it includes as special cases the Euclidean Steiner minimal tree problem (ESMT), the rectilinear Steiner tree problem (RST), and the Steiner tree problem on graphs (STG). ASteiner hull forK inR generically refers to any subregion ofR known to contain a Steiner tree. This paper gives a survey of the role of Steiner hulls in the Steiner tree problem. The significance of Steiner hulls in the efficient solution of Steiner tree problems is outlined, and then a compendium is given of the known Steiner hull constructions for ESMT, RST, and STG problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067240
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  • 6
    Electronic Resource
    Electronic Resource
    A paradigm for listing (s, t)-cuts in graphs (1996)
    Springer
    Algorithmica 15 (1996), S. 351-372 
    Details
    ISSN: 1432-0541
    Keywords: Algorithm ; Cut ; Enumeration ; Generation ; Ideal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract This paper studies the generation of various types of (s, t)-cuts in directed and undirected graphs. We present a general paradigm for listing such (s, t)-cuts and we identify properties of classes of cuts that allow this approach to be applied. The paradigm lists the cuts in time linear in the number of cuts, with the time-per-cut complexity dependent upon that of a “pivot” subroutine applied at each step of the procedure. In addition to unifying known routines for enumerating minimal (s, t)-cuts in undirected graphs, uniformly directed (s, t)-cuts, and antichains in partial orders, the paradigm provides efficient generation schemes for several new classes of cuts: minimal (s, t)-cuts in directed graphs, minimum weight/cardinality (s, t)-cuts, “semidirected” (s, t)-cuts, and classes of multiterminal cuts. Except for the semidirected cuts, all of the procedures have time-per-cut complexity that is linear in the size of the graph.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01961544
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  • 7
    Electronic Resource
    Electronic Resource
    Two new criteria for finding Steiner hulls in Steiner tree problems (1992)
    Springer
    Algorithmica 7 (1992), S. 289-302 
    Details
    ISSN: 1432-0541
    Keywords: Steiner tree ; Steiner hull ; Graph ; Plane ; Rectilinear
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract The Steiner tree problem considered in this paper is that of finding a network of minimum length connecting a given setK of terminals in a regionR of the Euclidean plane. ASteiner hull forK inR is any subregion ofR known to contain a Steiner tree forK inR. Two new criteria are given for finding Steiner hulls—one for the Steiner tree problem on plane graphs and one for the rectilinear Steiner tree problem—which strengthen known polynomial-time methods of finding Steiner hulls.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01758763
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  • 8
    Electronic Resource
    Electronic Resource
    Analysis of intra-specific somatic hybrids of potato (Solanum tuberosum) using simple sequence repeats (1996)
    Springer
    Plant cell reports 16 (1996), S. 196-199 
    Details
    ISSN: 1432-203X
    Keywords: Key words: potato, simple sequence repeats, somatic hybrids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. We have utilised simple sequence repeat (SSR) polymorphism to analyse two sets of potential intra-specific hybrids of potato. Two primer pairs were used and both showed that one set of fusion products could not be true heterokaryons. In the other set, one of the primer pairs showed that unique bands in each of the parents were present in all of the hybrids, unambiguously demonstrating hybridity. This simple and robust, high-resolution assay can be used at the callus level and is amenable to automation, making it possible to reduce greatly the time required to screen a large number of potential somatic hybrids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050205
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  • 9
    Electronic Resource
    Electronic Resource
    Analysis of intra-specific somatic hybrids of potato (Solanum tuberosum) using simple sequence repeats (1996)
    Springer
    Plant cell reports 16 (1996), S. 196-199 
    Details
    ISSN: 1432-203X
    Keywords: potato ; simple sequence repeats ; somatic hybrids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have utilised simple sequence repeat (SSR) polymorphism to analyse two sets of potential intra-specific hybrids of potato. Two primer pairs were used and both showed that one set of fusion products could not be true heterokaryons. In the other set, one of the primer pairs showed that unique bands in each of the parents were present in all of the hybrids, unambiguously demonstrating hybridity. This simple and robust, high-resolution assay can be used at the callus level and is amenable to automation, making it possible to reduce greatly the time required to screen a large number of potential somatic hybrids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01890866
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  • 10
    Electronic Resource
    Electronic Resource
    Evaluating genetic relationships between indigenous coconut (Cocos nucifera L.) accessions from Sri Lanka by means of AFLP profiling (1998)
    Springer
    Theoretical and applied genetics 96 (1998), S. 545-550 
    Details
    ISSN: 1432-2242
    Keywords: Key words Coconut ; AFLPs ; AMOVA ; Genetic resources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  PCR-based DNA profiling of coconut palms indigenous to Sri Lanka was conducted using amplified fragment length polymorphism (AFLPs). A total of 322 amplification products were generated from the 42 genotypes with eight pairs of primers (EcoRI and MseI). Overall most variation was detected in the tall (Typica) rather than the intermediate (Aurantiaca) and dwarf (Nana) forms. A hierarchical analysis of molecular variance (AMOVA) was used to quantify and partition levels of variability into between- and within-form components. This revealed that for the inbreeding dwarf and intermediate forms most variation was observed between, rather than within, forms. In contrast, the outbreeding tall forms exhibited as much variation within as between forms. These observations have important implications for the maintenance and collection of coconut germplasm. This study also provided insights into the genetic (as opposed to phenotypic) relatedness of coconut accessions. Morphologically the Aurantiaca group of accessions are considered to be intermediate between the tall and dwarf accessions. Estimation of genetic relatedness based on AFLP analysis identified the Aurantiaca group as being more similar to the dwarf rather than the tall group. In addition, putative duplicate accessions were identified in the Aurantiaca group. Information emerging from this study will facilitate the management of coconut germplasm and optimise the choice of genetically divergent parents for crossing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050772
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