Neutrino Induced Electrostatic Waves in Degenerate Electron Plasmas

The plasma theory of electrostatic waves generated collisionlessly when neutrinos pass through degenerate electrons is developed. It is consistent with the results of calculations using quantum statistical field theory in the degenerate limit for kinetic instabilities, and using this formalism reactive instabilities may also be treated. For all neutrino distribution functions that might be appropriate to the neutrino burst during a core collapse supernova, no significant wave growth is found for non-magnetic electrostatic waves. It is speculated that this situation might be different for magnetic fields approaching the values believed to be present on magnetars.Comment: 11 pages, 1 figure, uses aaspp4.sty, to be published in Physics Letters

The impact of salient cultural practices on the outcome of IS implementation

This paper appears in Journal of Global Information Management. Copyright 2017, IGI Global, www.igi-global.com. Posted by permission of the publisher.A number of information system (IS) studies have adopted organisational culture (OC) theory to investigate IS implementations. The studies highlight that members will reach consensus or agreement in the use of an IS but also experience inevitable tensions and ambiguities in the use of the IS. However, literature related to IS implementation/OC has rarely examined the influence that the saliency of specific cultural practices may have on the success or failure of IS implementations. Using a case study approach, we adopted the “soft positivism” research philosophy to collect data, underpinned by Martin’s (1992) integration and differentiation perspectives of OC to study the organisational implementation of an IS. These perspectives served as interpretive lenses through which to explain how members’ salient behaviours towards an IS evolved during the implementation process. Our study augments the IS implementation/OC literature by demonstrating how salient cultural practices influence the outcome of IS implementation

Fermionic quantization of Hopf solitons

In this paper we show how to quantize Hopf solitons using the Finkelstein-Rubinstein approach. Hopf solitons can be quantized as fermions if their Hopf charge is odd. Symmetries of classical minimal energy configurations induce loops in configuration space which give rise to constraints on the wave function. These constraints depend on whether the given loop is contractible. Our method is to exploit the relationship between the configuration spaces of the Faddeev-Hopf and Skyrme models provided by the Hopf fibration. We then use recent results in the Skyrme model to determine whether loops are contractible. We discuss possible quantum ground states up to Hopf charge Q=7

Exact moduli space metrics for hyperbolic vortex polygons

Exact metrics on some totally geodesic submanifolds of the moduli space of static hyperbolic N-vortices are derived. These submanifolds, denoted as Sigma_{n,m}, are spaces of C_n-invariant vortex configurations with n single vortices at the vertices of a regular polygon and m=N?n coincident vortices at the polygon's center. The geometric properties of Sigma_{n,m} are investigated, and it is found that Sigma_{n,n?1} is isometric to the hyperbolic plane of curvature ?(3 pi n)^{?1}. The geodesic flow on Sigma_{n,m} and a geometrically natural variant of geodesic flow recently proposed by Collie and Tong [“The dynamics of Chern-Simons vortices,” Phys. Rev. D Part. Fields Gravit. Cosmol. 78, 065013 (2008);e-print arXiv:hep-th/0805.0602] are analyzed in detail

Technologies for small water and wastewater systems

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