ELECTROCARIAN

Fresh water scarcity has reached our doors. What can u  do for fresh water. Here's a live case study where Indian Ladies use their sarees to filter water and  to fight against  Cholera. The low-tech solution, which involves using the   traditional Indian garment   to filter pond and river water before drinking, is ingenious in its simplicity. And it works, too. I n  2003 field study, Rita Colwell and her colleagues from the  University of Maryland  and the Johns Hopkins Bloomberg School of Public Health  demonstrated that cotton sari cloth, when folded at least eight times and used as a filter for drinking water, can reduce the incidence of cholera by up to 48 percent. Besides removing plankton, the cloth also filters out the bacteria that grows on the plankton, including the bacterium that’s responsible for causing  cholera , an infection of the small intestine that results in watery diarrhea, vomiting, and life-threatening dehydration. Five years later, a follow-up study showed

5.1 Introduction The predominant interface between humans and computers is the keyboard. Keyboard range in complexity from the “up-down” buttons used for elevators to the personal computer multimedia keyboard layout, with the addition of function keys and numeric keypads. One of first requirement was to interface keyboard with microcontroller and with the main processor in personal computers. Industrial and commercial applications fall somewhere in between these extremes, using layouts that might feature from six to twenty keys. One of the most basic requirements in configuring a keypad is to accommodate need of human user. Human beings are irritable. They have little tolerance for machine failure. You have seen the behavior of people at the elevator. Even if the “up” light is lit when we arrive, we will push it again to let the machine know that “I’m here too.” Thus the hardware designer has to select keys that will survive in the intended environment. The programmer must write th