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repositories = "University of Newcastle Library E-Print Archives"
<< < 541 542 543 544 545 > >>

Found 5,448 documents, displaying page 542 of 545

Abelian subalgebras of von Neumann algebras from flat tori in locally symmetric spaces

Author(s) : Prof. Alexander Guyan Robertson
Description : Consider a compact locally symmetric space M of rank r with fundamental group 915. The von Neumann algebra VN915 is the convolution algebra of functions f84672915 which act by left convolution on 84672915. Let Tr be a totally geodesic flat torus of dimension r in M and let be the image of the fundam...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Abelian subgroup structure of square complex groups and arithmetic of quaternions

Author(s) : Prof. Alexander Guyan Robertson , D Rattaggi
Description : No abstract available
Repository : University of Newcastle Library E-Print Archives
Language(s) :

The future use of structural composite materials in the automotive industry

Author(s) : G Pitaressi , E Mangino , J Carruthers
Description : The automotive industrys use of structural composite materials began in the 1950s. Since those early days it has been demonstrated that composites are lightweight fatigue resistant and easily moulded to shape in other words a seemingly attractive alternative to metals. However there has been no wide...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

A comparative evaluation of crashworthy composite sandwich structures

Author(s) : Prof. Alexander Mark Robinson , G Pitaressi , J Carruthers
Description : This paper describes an experimental evaluation of the energy absorption properties of a series of novel designs for cost-effective crashworthy composite sandwich structures. All the designs are based on the concept of the tied-core sandwich i.e. the use of additional core reinforcements that act to...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Zonal flows and grand minima in a solar dynamo model

Author(s) : Dr Paul James Bushby
Description : Observations of differential rotation within the solar convection zone have revealed a cyclic pattern of zonal shear flows. Given that the 11-yr periodicity of this flow pattern is approximately half that of the 22-yr solar activity cycle it is likely that these flows are magnetically driven. In thi...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Zonal flows in a mean-field solar dynamo model

Author(s) : Dr Paul James Bushby
Description : Cyclic variations are observed in the solar differential rotation profile. The 11 year periodicity of these zonal shear flows often referred to as torsional oscillations is consistent with the idea that they are driven by the Lorentz forces that are associated with the large-scale solar dynamo. This...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Deadlock Checking Using Liner Programming and Partial Order Dependencies

Author(s) : M. Koutny , V. Khomenko
Description : Model checking based on the causal partial order semantics of Petri nets is an approach widely applied to cope with the state space explosion problem. One of the ways to exploit such a semantics is to consider finite prefixes of net unfoldings --- themselves a class of acyclic Petri nets --- which c...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Spatially intermittent fields in photospheric magnetoconvection

Author(s) : S Houghton , Dr Paul James Bushby
Description : Motivated by recent high-resolution observations of the solar surface we investigate the problem of non-linear magnetoconvection in a three-dimensional compressible layer. We present results from a set of numerical simulations which model the situation in which there is a weak imposed magnetic field...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

A characterisation of virtually free groups

Author(s) : D Holt , S Hermiller , R Gilman , Prof. Sarah Elizabeth Rees
Description : We prove that a finitely generated group G is virtually free if and only if there exists a generating set for G and k 0 such that all k-locally geodesic words with respect to that generating set are geodesic.
Repository : University of Newcastle Library E-Print Archives
Language(s) : English

Computing subgroup presentations using the coherence arguments of McCammond and Wise

Author(s) : Prof. Sarah Elizabeth Rees , O Payne
Description : We describe an algorithm which may be used to compute a finite presentation of a finitely generated subgroup of a finitely presented group G provided that G satisfies appropriate hypotheses. The algorithm is based on an algorithm of McCammond and Wise but is extended to cover a wider class of groups...
Repository : University of Newcastle Library E-Print Archives
Language(s) : English
<< < 541 542 543 544 545 > >>

Found 5,448 documents, displaying page 542 of 545