The research trends of Arts, Humanities and Social Sciences Research at the University of Zululand, 1994 - 2008

The Arts, Humanities and Social Sciences departments play a fundamental role in university education and in promoting the vision and mission of the University of Zululand. This paper explores definitions of Humanities and the Social Sciences, and the terms ‘research’ and ‘research output’, and examines the status and challenges of research management at the University of Zululand to evaluate research in the cited departments. A bibliometric method was used to analyse the trends and challenges of Humanities and Social Sciences research by using research data reflecting on ongoing and completed Arts, Humanities and Social Science research publications submitted by staff and students from 1994 – 2008 to the university’s Research Office. Data was analysed by categorising research output according to overall research publication by department, publication in accredited (SAPSE) journals by each department, author productivity, and research output by categories. Pearson’s correlation analysis was applied to test whether there was any correlation between registered research projects and research publications. Results indicate that strong AH&SS research engagement and publication exist at the university. Most research output was in the form of journal articles and conference papers. There was also growing postgraduate research output in the form of Masters and Doctoral dissertations. AH&SS research is generally multidisciplinary in nature. We noted that the system for capturing completed Masters and Doctoral research reports at the university is inadequate. The paper raises other issues that are important for AH&SS research and development. Keywords: Research, research trends, humanities, social sciences, arts, humanities and social sciences, informetrics, University of Zululan

Banking customers’ attitudes toward complaining : their likelihood of voicing a complaint and service recovery they consider appropriate.

This paper measures the attitude of banking customers towards complaining and their likelihood to complain when a service failure is experienced at their current and another bank. Insight is also provided into the service recovery responses customers consider appropriate when a service failure is experienced. The target population included individuals in the Gauteng Province of South Africa who hold a bank account in their personal capacity. An interviewer-administered survey was used to collect data using non-probability quota sampling based upon population group and gender. A demographic profile of respondents, as well as the findings in terms of the aforementioned constructs and related hypotheses is provided. The study found that respondents have a positive attitude towards complaining, and that they are significantly more likely to voice a complaint when experiencing a service failure at their current bank than at another bank. Significant differences also exist with regard to the individual responses respondents consider appropriate when confronted with a hypothetical service failure experienced at their current bank and another bank

A South African perspective on factors that impact on the adoption and meaningful use of health information technologies

Objective: Various benefits are associated with the adoption and meaningful use of health information technologies (HITs) in the healthcare sector. Despite the associated advantages with the adoption and use of HITs, the South African healthcare sector has been slow to adopt HITs, such as electronic record systems. The purpose of this study was to identify factors that should be addressed to encourage the adoption and meaningful use of HITs in the South African healthcare landscape.Design: A three-round Delphi study was conducted to identify such factors.Setting and subjects: The Delphi panel included 21 participants who were considered to be suitably knowledgeable about the acceptance and significant use of HITs in the context of the South African healthcare setting.Results: A total of 58 factors were uncovered by the participants. Consensus was reached on 42 factors that were considered to have a direct to significant impact on the adoption and meaningful use of HITs in the South African healthcare sector.Conclusion: The results of this study highlight factors that should be addressed to encourage the adoption and meaningful use of HITs in South Africa’s healthcare setting. These results indicate that a wide range of factors need to be addressed and involve a multitude of stakeholders.Keywords: health information technology, adoption, meaningful use, South Africa, Delphi stud

Converging cylindrical magnetohydrodynamic shock collapse onto a power-law-varying line current

We investigate the convergence behaviour of a cylindrical, fast magnetohydrodynamic (MHD) shock wave in a neutrally ionized gas collapsing onto an axial line current that generates a power law in time, azimuthal magnetic field. The analysis is done within the framework of a modified version of ideal MHD for an inviscid, non-dissipative, neutrally ionized compressible gas. The time variation of the magnetic field is tuned such that it approaches zero at the instant that the shock reaches the axis. This configuration is motivated by the desire to produce a finite magnetic field at finite shock radius but a singular gas pressure and temperature at the instant of shock impact. Our main focus is on the variation with shock radius r, as r→0, of the shock Mach number M(r) and pressure behind the shock p(r) as a function of the magnetic field power-law exponent μ ⩾ 0, where μ = 0 gives a constant-in-time line current. The flow problem is first formulated using an extension of geometrical shock dynamics (GSD) into the time domain to take account of the time-varying conditions ahead of the converging shock, coupled with appropriate shock-jump conditions for a fast, symmetric MHD shock. This provides a pair of ordinary differential equations describing both M(r) and the time evolution on the shock, as a function of r, constrained by a collapse condition required to achieve tuned shock convergence. Asymptotic, analytical results for M(r) and p(r) are obtained over a range of μ for general γ, and for both small and large r. In addition, numerical solutions of the GSD equations are performed over a large range of r, for selected parameters using γ=5/3. The accuracy of the GSD model is verified for some cases using direct numerical solution of the full, radially symmetric MHD equations using a shock-capturing method. For the GSD solutions, it is found that the physical character of the shock convergence to the axis is a strong function of μ. For 0 ⩽ μ < 4/13, M and p both approach unity at shock impact r=0 owing to the dominance of the strong magnetic field over the amplifying effects of geometrical convergence. When μ⩾0.816 (for γ=5/3), geometrical convergence is dominant and the shock behaves similarly to a converging gas dynamic shock with singular M(r) and p(r), r→0. For 4/13 < μ ⩽ 0.816 three distinct regions of M(r) variation are identified. For each of these p(r) is singular at the axis

Geometrical shock dynamics for magnetohydrodynamic fast shocks

We describe a formulation of two-dimensional geometrical shock dynamics (GSD) suitable for ideal magnetohydrodynamic (MHD) fast shocks under magnetic fields of general strength and orientation. The resulting area–Mach-number–shock-angle relation is then incorporated into a numerical method using pseudospectral differentiation. The MHD-GSD model is verified by comparison with results from nonlinear finite-volume solution of the complete ideal MHD equations applied to a shock implosion flow in the presence of an oblique and spatially varying magnetic field ahead of the shock. Results from application of the MHD-GSD equations to the stability of fast MHD shocks in two dimensions are presented. It is shown that the time to formation of triple points for both perturbed MHD and gas-dynamic shocks increases as ϵ^(-1), where ϵ is a measure of the initial Mach-number perturbation. Symmetry breaking in the MHD case is demonstrated. In cylindrical converging geometry, in the presence of an azimuthal field produced by a line current, the MHD shock behaves in the mean as in Pullin et al. (Phys. Fluids, vol. 26, 2014, 097103), but suffers a greater relative pressure fluctuation along the shock than the gas-dynamic shock

Effects of seed magnetic fields on magnetohydrodynamic implosion structure and dynamics

The effects of various seed magnetic fields on the dynamics of cylindrical and spherical implosions in ideal magnetohydrodynamics are investigated. Here, we present a fundamental investigation of this problem utilizing cylindrical and spherical Riemann problems under three seed field configurations to initialize the implosions. The resulting flows are simulated numerically, revealing rich flow structures, including multiple families of magnetohydrodynamic shocks and rarefactions that interact non-linearly. We fully characterize these flow structures, examine their axi- and spherisymmetry-breaking behaviour, and provide data on asymmetry evolution for different field strengths and driving pressures for each seed field configuration. We find that out of the configurations investigated, a seed field for which the implosion centre is a saddle point in at least one plane exhibits the least degree of asymmetry during implosion

Converging cylindrical shocks in ideal magnetohydrodynamics

We consider a cylindrically symmetrical shock converging onto an axis within the framework of ideal, compressible-gas non-dissipative magnetohydrodynamics (MHD). In cylindrical polar co-ordinates we restrict attention to either constant axial magnetic field or to the azimuthal but singular magnetic field produced by a line current on the axis. Under the constraint of zero normal magnetic field and zero tangential fluid speed at the shock, a set of restricted shock-jump conditions are obtained as functions of the shock Mach number, defined as the ratio of the local shock speed to the unique magnetohydrodynamic wave speed ahead of the shock, and also of a parameter measuring the local strength of the magnetic field. For the line current case, two approaches are explored and the results compared in detail. The first is geometrical shock-dynamics where the restricted shock-jump conditions are applied directly to the equation on the characteristic entering the shock from behind. This gives an ordinary-differential equation for the shock Mach number as a function of radius which is integrated numerically to provide profiles of the shock implosion. Also, analytic, asymptotic results are obtained for the shock trajectory at small radius. The second approach is direct numerical solution of the radially symmetric MHD equations using a shock-capturing method. For the axial magnetic field case the shock implosion is of the Guderley power-law type with exponent that is not affected by the presence of a finite magnetic field. For the axial current case, however, the presence of a tangential magnetic field ahead of the shock with strength inversely proportional to radius introduces a length scale R = √μ_0/p_0I/(2π) where I is the current, μ_0 is the permeability, and p_0 is the pressure ahead of the shock. For shocks initiated at r ≫ R, shock convergence is first accompanied by shock strengthening as for the strictly gas-dynamic implosion. The diverging magnetic field then slows the shock Mach number growth producing a maximum followed by monotonic reduction towards magnetosonic conditions, even as the shock accelerates toward the axis. A parameter space of initial shock Mach number at a given radius is explored and the implications of the present results for inertial confinement fusion are discussed

Magnetohydrodynamic implosion symmetry and suppression of Richtmyer-Meshkov instability in an octahedrally symmetric field

We present numerical simulations of ideal magnetohydrodynamics showing suppression of the Richtmyer-Meshkov instability in spherical implosions in the presence of an octahedrally symmetric magnetic field. This field configuration is of interest owing to its high degree of spherical symmetry in comparison with previously considered dihedrally symmetric fields. The simulations indicate that the octahedral field suppresses the instability comparably to the other previously considered candidate fields for light-heavy interface accelerations while retaining a highly symmetric underlying flow even at high field strengths. With this field, there is a reduction in the root-mean-square perturbation amplitude of up to approximately 50% at representative time under the strongest field tested while maintaining a homogeneous suppression pattern compared to the other candidate fields

Local Field Effects on Magnetic Suppression of the Converging Richtmyer-Meshkov Instability

We examine how the suppression of the converging shockdriven Richtmyer-Meshkov instability by an applied magnetic field is dependent on the local magnetic field strength and orientation. In particular, we examine whether the extent of suppression can be reasonably predicted by a linear model for the planar case. This is done for cylindrically converging cases with a high perturbation wavenumber and two different initial magnetic field configurations