Tag: Coal
Smart coal mine helmet uses Li-Fi sensor alerts
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in EngineeringWhat the study found The authors present a smart safety helmet for coal miners that uses Li-Fi, or light fidelity, to transmit sensor data. The helmet is designed to monitor heartbeat, humidity, gas, and temperature and to send alert messages to mobile phones and email for authorized people. Why the authors say this matters The…
China coal prices show stable long-term links across market variables
Analysis of China’s steam coal price formation reveals that port inventory, shipping costs, and oil prices drive pricing dynamics more than production alone, with implications for energy policy.
