a temperature-sensing device (IMAGE) Penn State Caption The system consists of a temperature-sensing device, a propane-fueled heater that adjusts its direction and angle automatically depending on wind direction, and an unmanned ground vehicle to move the heating system through an apple orchard. Credit Penn State Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.