A system and method for filtering data sources is provided. The circuit further includes a resistive element having a first terminal coupled to the control electrode of the first transistor and a second terminal coupled to the power supply terminal. A first time-constant is provided to determine whether the rise in the voltage level is caused by an electrostatic event. The grass protection mat, due to its ground anchoring portions being disposed in closest possible proximity to the ground surface to improve anchoring to the ground when the ground anchoring portions are pressed during on-site installation, can offer superior results including effective prevention of being lifted, deformed, and disconnected. feeding Step 1 with a mixture obtained by partially or entirely removing water from the reaction product, wherein the mixture contains an unreacted 1,2-diol andor alcohol. In one embodiment, the trainline is an Electrically Controlled Pneumatic trainline and the propulsion control data is ECP brake data used to control operations of brakes in the train.