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purchase irbesartan "The experiments have shown that the front visibility is a good indicator for rainfall intensity," said Ehsan Rabiei, Haberlandt's collaborator and the paper's lead author. However, a measurement dependent on hundreds of people adjusting their wipers might not always give accurate data, since different drivers might have different feelings on how much or often to use their wipers. So, the team conducted another set of experiments, this time using the optical sensors that many newer cars come fitted with to automate wipers. Turns out that sensor readings offer very accurate information on the amount of precipitation. "The optical sensors measure the rain on the windshield in a more direct and continuous manner so, currently, they would be the better choice for rain sensors in cars," Haberlandt said.