Planning to install new spark plugs in your vehicle? There are lots of choices in spark plug design these days -- plugs with one, two, three, or even four ground electrodes. There are also exotic materials like platinum, yttrium, and iridium for center and ground electrodes. So how to choose?Bosch, one of the largest suppliers of spark plugs as original equipment for auto manufacturers as well as in the aftermarket, offers some cogent thoughts on...
The functions of electromechanical protection systems are now being replaced by microprocessor-based digital protective relays, sometimes called "numeric relay...
The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites. It is maintained by the United States government and is freely accessible by anyone with a GPS receiver. The system imposes some technical limitations[clarification needed] which are only removed for authorized users.The GPS program provides critical capabilities to military, civil and commercial...