African University of Science and Technology: Recent submissions
Now showing items 1261-1280 of 4824
-
-
-
-
The calculation of sparticle and Higgs decays in the minimal and next-to-minimal supersymmetric standard models: SOFTSUSY4.0
(ElsevierComputer Physics Communications, 2017-11-01)We describe a major extension of the SOFTSUSY spectrum calculator to include the calculation of the decays, branching ratios and lifetimes of sparticles into lighter sparticles, covering the next-to-minimal supersymmetric ...
-
-
The acoustic Green's function for swirling flow with variable entropy in a lined duct
This paper extends previous work by the authors (Journal of Sound and Vibration, 395:294-316,2017) on the acoustic field inside an annular duct with acoustic lining carrying mean axial and swirling flow so as to allow for ...
-
Local models of astrophysical discs
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-12-01)Local models of gaseous accretion discs have been successfully employed for decades to describe an assortment of small-scale phenomena, from instabilities and turbulence, to dust dynamics and planet formation. For the most ...
-
Stability of three-dimensional columnar convection in a porous medium
(Cambridge University PressJournal of Fluid Mechanics, 2017-10-25)The stability of steady convective exchange flow with a rectangular planform in an unbounded three-dimensional porous medium is explored. The base flow comprises a balance between vertical advection with amplitude A in ...
-
High fidelity compression of irregularly sampled height fields
(University of Cape TownFaculty of ScienceDept. of Computer Science, 2007)This paper presents a method to compress irregularly sampled height-fields based on a multi-resolution framework. Unlike many other height-field compression techniques, no resampling is required so the original height-field ...
-
Efficient boundary integral solution for acoustic wave scattering by irregular surfaces
(ElsevierEngineering Analysis with Boundary Elements, 2017-10-01)The left–right operator splitting method is studied for the efficient calculation of acoustic fields scattered by arbitrary rough surfaces. Here, the governing boundary integral is written as a sum of left- and right-going ...
-
A two-fluid model for locomotion under self-confinement
(American Physical SocietyPhysical Review Fluids, 2017-09-01)The bacterium Helicobacter pylori causes ulcers in the stomach of humans by invading mucus layers protecting epithelial cells. It does so by chemically changing the rheological properties of the mucus from a high-viscosity ...
-
Emission-angle and polarization-rotation effects in the lensed CMB
Lensing of the CMB is an important effect, and is usually modelled by remapping the unlensed CMB fields by a lensing deflection. However the lensing deflections also change the photon path so that the emission angle is no ...
-
Adjoint-based optimization of displacement ventilation flow
(ElsevierBuilding and Environment, 2017-11-01)We demonstrate the use of the ‘Direct-Adjoint-Looping method’ for the identification of optimal buoyancy-driven ventilation flows governed by Boussinesq equations. We use the incompressible Reynolds-averaged Navier-Stokes ...
-
Strategies to Implement Parallel Discrete Event System Specification Algorithms
(AUST, 2014-12-15)Discrete Event System Specification (DEVS) formalism is a Modeling and Simulation (M&S) framework that provides a means of specifying systems. It separates a model from its simulator. The former describes the structure and ...
-
Genetic Algorithms for timetable Generation
(AUST, 2014-12-15)Timetabling presents an NP-hard combinatorial optimization problem which requires an efficient search algorithm. This research aims at designing a genetic algorithm for timetabling real-world school resources to fulfil a ...
-
Detecting Denial of Service attack in Wireless Sensor Networks
(2014-12-15)Wireless sensor networks, thanks to recent technological advances, has become prevalent and offer a variety of applications ranging from environmental monitoring to support and automate chores fields. However, this very ...
-
Scattering of biflagellate micro-swimmers from surfaces
(American Physics SocietyPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2017-08-10)We use a three-bead-spring model to investigate the dynamics of bi-flagellate micro-swimmers near a surface. While the primary dynamics and scattering are governed by geometric-dependent direct contact, the fluid flows ...
-
Alternating Direction Implicit (ADI) schemes for a PDE-based image osmosis model
(Journal of Physics: Conference Series, 2017-10-22)© Published under licence by IOP Publishing Ltd. We consider Alternating Direction Implicit (ADI) splitting schemes to compute efficiently the numerical solution of the PDE osmosis model considered by Weickert et al. in ...
-
X-Switch: An Efficient Multi-User Multi-Language Web Application Server.
(University of Cape TownFaculty of ScienceDept. of Computer Science, 2010)Web applications are usually installed on and accessed through a Web server. For security reasons, these Web servers generally provide very few privileges to Web applications, defaulting to executing them in the realm of ...
-
A Balanced Approach to IT Project Management
(University of Cape TownFaculty of CommerceDept. of Information Systems, 2007)The primary objectives of this study were to identify how IT projects can be managed using the Balanced Scorecard approach. Although the research is positioned to have potential application within international project ...




