"Grimbichler" . "David" . "c881cb8193b33fa4e886b224c2c62248" . . "Radon"@en . "Wireless sensor networks"@en . "Volcano monitoring"@en . "David Grimbichler" . "IoT"@en . "Sensors"@en . "Data lake"@en . . "LoRaWAN"@en .