Browsing Faculty of Natural Sciences@PUK by Title
Now showing items 731750 of 1923

Galactic cosmic rays in the outer heliosphere: theory and models
(Springer, 2011)We review recent advances in the field of galactic cosmic ray transport in the distant heliosphere. The advent of globalMHD models brought about a better understanding of the threedimensional structure of the interface ... 
Gammaray and radio properties of six pulsars detected by the fermi large area telescope
(Institution of Physics (IOP), 2010) 
GammaRay emission from the shell of supernova remnant W44 revealed by the Fermi LAT
(HighWire Press, 2010) 
Gamma–gamma absorption in the γray binary system PSR B125963/LS 2883
(IOP, 2017)The observed TeV light curve from the γray binary PSR B125963/LS 2883 shows a decrease in the flux at periastron that has not been fully explained by emission mechanisms alone. This observed decrease can, however, be ... 
Gamma–ray observational properties of TeV–detected blazars
(IOP Science, 2013)The synergy between the FermiLAT and groundbased Cherenkov telescope arrays gives us the opportunity for the first time to characterize the highenergy emission from blazars over 5 decades in energy, from 100 MeV to 10 ... 
Gas chromatographymass spectrometry profiles of urinary organic acids in healthy captive cheetahs ( Acinonyx jubatus )
(Elsevier, 2017)In captivity, cheetahs (Acinonyx jubatus) frequently suffer from several unusual chronic diseases that rarely occur in their freeranging counterparts. In order to develop a better understanding of their metabolism and ... 
Gas crossover mitigation in PEM water electrolysis: hydrogen crossover benchmark study of 3M's IrNSTF based electrolysis catalystcoated membranes
(ECS, 2016)In this work we present some preliminary data, such as permeability (gas crossover) of oxygen and hydrogen as a function of current density and other operational variables, aimed at establishing baselines for unmitigated ... 
Gender effects on self–regulation among university students
(Taylor & Francis, 2012)The aim of this study was to explore the relation between selfregulation, psychopathology and gender amongst a group of South African university students (N=384). Selfregulation was measured with the Shortened ... 
General overview: European integrated project on Aerosol Cloud Climate and Air Quality Interactions (EUCAARI) – integrating aerosol research from nano to global scales
(Copernicus Publications, 2011)In this paper we describe and summarize the main achievements of the European Aerosol Cloud Climate and Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 and ended on 31 December 2010 leaving a ... 
A general timedependent stochastic method for solving Parker's transport equation in spherical coordinates
(American Geophysical Union, 2010) 
A generalized additive neural network application in information security
(Tadbir Operational Research Group, 2014)Traditionally spam has been considered as an inconvenience requiring workers to sift through and delete large numbers of email messages per day. However, new developments and the Internet have dramatically transformed the ... 
Generalized copula–graphic estimator
(Springer Verlag, 2013)In this paper, a copulagraphic estimator is proposed for censored survival data. It is assumed that there is some dependent censoring acting on the variable of interest that may come from an existing competing risk. ... 
A generalized diffusion tensor for fully anisotropic diffusion of energetic particles in the heliospheric magnetic field
(IOP publishing, 2012)The spatial diffusion of cosmic rays in turbulent magnetic fields can, in the most general case, be fully anisotropic, i.e., one has to distinguish three diffusion axes in a local, fieldaligned frame. We reexamine the ... 
Generalized double sinhGordon equation: symmetry reductions, exact solutions and conservation laws
(Shiraz University, 2015)This paper aims to study a generalized double sinhGordon equation, which appears in several physical phenomena such as integrable quantum field theory, kink dynamics and fluid dynamics. Lie symmetry analysis together ... 
The Generalized functions of the second kind for general exponential weights
(Taylor & Francis, 2010) 
A generalized twocomponent model of solar wind turbulence and ab initio diffusion meanfree paths and drift lengthscales of cosmic rays
(IOP Publishing, 2016)We extend a twocomponent model for the evolution of fluctuations in the solar wind plasma so that it is fully threedimensional (3D) and also coupled selfconsistently to the largescale magnetohydrodynamic equations ... 
Generating highresolution digital elevation models for wetland research using Google EarthTM imagery an example from South Africa
(Water Researchh Commission, 2010) 
Generating interest rate scenarios for fixed income portfolio optimisation
(Actuarial Society of South Africa (ASSA), 2010) 
Generic rankk perturbations of structured matrices
(Springer, 2016)This paper deals with the effect of generic but structured low rank perturbations on the Jordan structure and sign characteristic of matrices that have structure in an indefinite inner product space. The paper is a followup ...