In this paper we try to develop an algorithm for Support visual obstacle avoidance of autonomous mobile robot.The input of the algorithm is an image sequence grabbed by an embedded camera on the B21r robot in motion.Then, the optical flow information is extracted from the image sequence in order to be used in the navigation algorithm.The optical fl
Nanoscale zero-valent iron (nZVI) shows an excellent degradation effect on chlorinated contaminants in soil, but poses a threat to plants in combination with phytoremediation.Arbuscular mycorrhizal (AM) fungus can reduce the phyototoxicity of nZVI, but their combined impacts on polychlorinated biphenyls (PCBs) degradation and plant growth remain un
Thin and flexible sensor foils are very suitable for unobtrusive integration with mechanical structures and allow monitoring for example strain and temperature while minimally interfering with the operation of those structures.Electrical strain gages have long been used for this purpose, but optical strain sensors based on Bragg gratings are gainin
Introduction: CD4 testing in South Africa is based on an integrated tiered service delivery model that matches testing demand with capacity.The National Health Laboratory Service has predominantly implemented laboratory-based CD4 testing.Coverage gaps, over-/under-capacitation and optimal placement of point-of-care (POC) testing sites need investig
Many species of birds breeding on ocean beaches and in coastal dunes are of global conservation concern.Most of these species rely on invertebrates (e.g.insects, small crustaceans) as an irreplaceable food source, foraging primarily around the strandline on the upper beach near the dunes.Sandy beaches are also prime sites for human recreation, whic