BACKGROUND Motor vehicle collisions and pedestrian injuries in areas where schools are located are public health problems in Durban. OBJECTIVE To evaluate the effect of traffic calming humps on the number and severity of incidences of collisions and injuries in the Chatsworth and KwaMashu residential areas of the eThekwini Municipality. METHODS The evaluation used an observational interrupt...

We demonstrate both theoretically and experimentally that photonic lattices under self-defocusing nonlinearity support gap solitons in various shapes such as cross and H shapes. These solitons, with their intensity humps all in-phase, are stable against perturbations, thus they propagate robustly throughout the lattices. Based on this finding, we propose soliton-based text/image transmission th...

Learning to program is notoriously difficult. A substantial minority of students fails in every introductory programming course in every UK university. Despite great academic effort, the proportion has increased rather than decreased over the years, and despite a great deal of research into teaching methods and student responses, we have no idea of the cause. It has long been suspected that som...

[1] We propose a solitary wave model for small scale magnetic structures observed in the solar wind and more recently in the Voyager 1 observations of the heliosheath. The model is based on the recent, fully nonlinear theory of solitary waves by McKenzie et al. (2001, 2004). Our solutions i.e., magnetic holes, humps, trains of holes and humps, are strongly nonlinear (70 to 80% change in the mag...

Here we present a detailed study of the broadband noise in power density spectra black hole X-ray binary MAXI J1820+070 during hard state its 2018 outburst, using Hard Modulation Telescope (Insight-HXMT) observations. The shows two main humps, which might separately correspond to variability from variable disk and Comptonization regions. We fitted humps with multiple Lorentzian functions studie...

Abstract Polyvinylidene fluoride (PVDF) hollow fiber membranes were developed by the thermally induced phase separation (TIPS) process using a triple-orifice spinneret with solvent co-extrusion at outermost channel for applications in membrane distillation (MD). The polymer surface concentration during preparation was controlled exploiting interfacial interactions of diluent and extruded surfac...