Este calendario muestra las fechas del mes de noviembre de 2011, con los días de la semana y las fechas numeradas de 1 a 30 para mostrar el número total de días en el mes.
The Indian railway tunnel lights remain On for 24 hrs and 365 days. This in turn causes various environmental issues as discussed in the presentation. The objective is to use renewable source of energy (piezoelectric materials) as a sensor to trigger the switching of lights inside the tunnels only when trains arrive near it.