Figure 1 (IMAGE) Tohoku University Caption Schematic illustration of a wireless network with energy-harvesting modules. RF signals that are unused by electronic gadgets and would otherwise go to waste are used to generate usable DC power to drive sensors and devices. Credit ©Shunsuke Fukami & Hyunsoo Yang Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original content 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.