TrackerDogs

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GPS and tracker dogs
Strap a GpsAndGprs unit to a tracker dog to locate it in real-time as it tracks an assailant through dense bush. Kit the dog handler with a combination of GpsAndGprs, RadioModems unit and ThermalImagingCameras to scout for assailant at night. Strap a camera to his chest or VideoGoggles. To eliminated jerky movements the camera can be stabilized using a RateGyro2 MEMS unit or pyrometer based camera stabilizer.

Instead of a real-time video feed back to the base, strap an embedded Mpeg4Compression and/or EmbeddedPc recording device to the handler for later playback. It is a waste of money to allow a security guard to roam a bush on his own scouting for assailants without anyway of knowing wether he did his work. There must be either a real-time or recorded video feed.

SecurityCompanyScams don't really have any incentive to actually completely stop the crime, that would never be the idea. In contrast the SAPS member in the firing line would cooperate with a scheme where violent gun wielding criminals can be prevented from harming anybody. How do you know that the security guards running around in the bush are actually doing their work?

Robot Sniffer
http://robots.net/ olfactory robots

According to a New Scientist article, robots may soon be a match for animals when it comes to following barely detectable scents to their origin. Researchers have developed a simple mathematical method for determining which way to go even when turbulence and eddies in the air render the trail difficult to follow. Robots using the algorithm follow paths similar to those of moths tracking pheromones. More details can be found in a letter titled, "'Infotaxis' as a strategy for searching without gradients", recently published in Nature by Massimo Vergassola, Emmanuel Villermaux, and Boris I. Shraiman. Also available online is an older paper by Shraiman, Olfactory Search at High Reynolds Number (PDF format).

http://www.nature.com/nature/journal/v445/n7126/abs/nature05464.html Robot cent tracker.