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, 2009
"... Secure mobile multimedia over allIP wireless heterogeneous networks A Doctoral Thesis presented to ..."
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Secure mobile multimedia over allIP wireless heterogeneous networks A Doctoral Thesis presented to
DOCTORAL THESIS
"... Bounding the order of a primitive permutation group in terms of its degree was a problem of 19th century group theory. Apart from some early results of Jordan probably the first successful estimate for the orders of primitive groups not containing the alternating group is due to Bochert [7] (see al ..."
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Bounding the order of a primitive permutation group in terms of its degree was a problem of 19th century group theory. Apart from some early results of Jordan probably the first successful estimate for the orders of primitive groups not containing the alternating group is due to Bochert [7] (see also [17] or [50]): if G is primitive and (Sn: G)> 2, then (Sn: G) ≥ [12(n + 1)]!. This bound is useful since it is the sharpest available general estimate for very small degrees. But it is far from best possible. Based on Wielandt’s method [51] of bounding the orders of Sylow subgroups Praeger and Saxl [41] obtained an exponential estimate, 4n, where n is the degree of the permutation group. Their proof is elaborate. Using entirely different combinatorial arguments, Babai [2] obtained an e4 n ln2 n estimate for uniprimitive (primitive but not doubly transitive) groups. For the orders of doubly transitive groups not containing the alternating group, Pyber obtained an n32log 2 n bound for n> 400 in [43] by an elementary argument (using some ideas of [3]). Apart from O(log n) factors in the exponents, the former two estimates are asymptotically sharp. To do better, one has to use the AschbacherO’NanScott theorem and the classification of finite simple groups. An nc ln lnn type bound with “known ” exceptions has been found by Cameron [14], while an n9 log2 n estimate follows from Liebeck [29]. In our dissertation we use the classification of finite simple groups to set the sharpest upper bounds possible for the orders of primitive permutation groups via a reasonably short argument. First the following is proved. Theorem 1.1. Let G be a primitive permutation group of degree n. Then one of the following holds. (i) G is a subgroup of Sm o Sr containing (Am)r, where the action of Sm is on kelement subsets of {1,...,m} and the wreath product has the product action of degree n =
Doctoral thesis.
"... ISSN 16526880, ISBN 9157671354 The protozoan parasite Neospora caninum is causing bovine abortion worldwide. The overall aim of this thesis was to gain a better understanding about N. caninum infection in dairy cattle in Thailand both at the individual animal and the herd level. Specifically, th ..."
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ISSN 16526880, ISBN 9157671354 The protozoan parasite Neospora caninum is causing bovine abortion worldwide. The overall aim of this thesis was to gain a better understanding about N. caninum infection in dairy cattle in Thailand both at the individual animal and the herd level. Specifically
Doctoral thesis
"... This thesis investigates the role of volatiles produced by oilseed rape (Brassica napus L.) and cotton (Gossypium hirsutum L.) in interactions with insects. It includes studies on release of volatiles by these two crops, as well as behavioural and electrophysiological responses to these odours by tw ..."
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This thesis investigates the role of volatiles produced by oilseed rape (Brassica napus L.) and cotton (Gossypium hirsutum L.) in interactions with insects. It includes studies on release of volatiles by these two crops, as well as behavioural and electrophysiological responses to these odours
Doctoral Thesis
, 2007
"... Introduced marine macroalgae and habitat modifiers their ecological role and significant attributes ..."
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Introduced marine macroalgae and habitat modifiers their ecological role and significant attributes
doctoral thesis
, 1993
"... The finite and high temperature equilibrium properties of YangMills theory in Landau gauge are studied. Special attention is paid to the fate of confinement and the infrared properties at high temperatures. The method implemented are the equations of motion, the DysonSchwinger equations. A specifi ..."
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The finite and high temperature equilibrium properties of YangMills theory in Landau gauge are studied. Special attention is paid to the fate of confinement and the infrared properties at high temperatures. The method implemented are the equations of motion, the DysonSchwinger equations. A specific approximation scheme is introduced, which was previously applied successfully to the vacuum. In a first step, the infinite temperature limit is taken. The theory reduces to a 3dimensional YangMills theory coupled to a massive adjoint Higgs field. The equations for the propagators of the Higgs, the gluon, and the FaddeevPopov ghost are obtained. They are solved in the infrared analytically and at least in the YangMills sector confinement is found. Therefore the hightemperature phase of a 4dimensional YangMills theory is nontrivial and strongly interacting. Solutions for all propagators are obtained numerically at all momenta. Thereby also the propagators of a pure 3dimensional YangMills theory are determined. Systematic studies find only quantitative effects of the errors, which are induced by the approximations. Good agreement to lattice calculations is found.
Doctoral Thesis
, 2008
"... Quantifying interactions between complex oscillatory systems: a topic in time series analysis ..."
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Quantifying interactions between complex oscillatory systems: a topic in time series analysis
Doctoral Thesis
"... Wilms ’ tumor gene 1 (WT1) and leukemianew insights and further complexity Akademisk avhandling av ..."
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Wilms ’ tumor gene 1 (WT1) and leukemianew insights and further complexity Akademisk avhandling av
Doctoral Thesis By
, 2009
"... Spatiotemporal variability of zooplankton community structure and trophic processes off central Peru ..."
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Spatiotemporal variability of zooplankton community structure and trophic processes off central Peru
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