Pesticides are a significant component of the modern agricultural technology that has been widely adopted across the globe to control pests, diseases, weeds and other plant pathogens, in an effort to reduce or eliminate yield losses and maintain high product quality. Although pesticides are said to be toxic and exposes farmers to risk due to the hazardous effects of these chemicals, pesticide u...

In this paper we describe the implementation of a Linux extension board for the e-puck educational mobile robot, designed to enhance the computation, memory and networking performance of the robot at very low cost. The extension board is based on a 32-bit ARM9 microprocessor and provides wireless network support. The ARM9 extension board runs in parallel with the dsPIC microprocessor on the e-p...

A novel speech bandwidth extension method based on audio watermark is presented in this paper. The time-domain and frequency-domain envelope parameters are extracted from the high-frequency components of speech signal, and then these parameters are embedded in the corresponding narrowband speech bit stream by the modified least significant bit watermark method which uses perception property. At...

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Household food security remains a challenge in South Africa. The national government instituted the Integrated Food Security Strategy (IFSS) programme which identifies household agricultural production as an important element of improving household-level food security. Agricultural extension is well positioned to help achieve this aim, but its current contribution is unknown. This study identif...

BACKGROUND Research conducted in Africa has consistently demonstrated that parental poverty and low educational attainment adversely affect child survival. Research conducted elsewhere has demonstrated that low-cost vaccines against preventable diseases reduce childhood mortality. Therefore, the extension of vaccination to impoverished populations is widely assumed to diminish equity effects. R...

Games use the same base technology and design strategy as do simulations, but add a few items to the mixture. Understanding this gives 'new' (read borrowed) tools for game creation and testing. The idea that simulations are implementations of a model, for instance, leads to a focus on the model rather than the code when designing a game. Similarly, the verification/validation pair used in simul...

Adaptive Web-based learning environments will play a vital role in the future development of standards-based national learning infrastructures. The importance of such infrastructures will escalate as nations increasingly integrate technology into their educational systems. The usefulness of these learning environments in both technical and pedagogical terms is incalculable. Educational systems,...

Interpolation and intersection methods are closely related and used in computer graphics, visualization, computer vision etc. The Euclidean representation is used nearly exclusively not only in computational methods, but also in education despite it might lead to instability in computation in many cases. The projective geometry, resp. projective extension of the Euclidean space, offers many pos...

The Internet lies at the heart of today’s social, educational and business worlds. Computer networking technology has hitherto provided the infrastructure to facilitate inter-personal pan-global communication on an unprecedented scale. The next logical development for such communicative pathways is the extension of access to this global mesh from individual static workstations to a multiplicity...