Abstract: The present disclosure provides a bolometer including a substrate, a reflecting mirror on the substrate, and a temperature sensing unit above the reflecting mirror. The temperature sensing unit includes a first insulating layer, a thermistor on the first insulating layer, a second insulating layer on the thermistor, an electrode layer in the second insulating layer and right above the thermistor, and a metal meta-surface in the second insulating layer and right above the electrode layer. The electrode layer includes a plurality of electrodes separated from each other. A projection region of the metal meta-surface on the thermistor is equal to or larger than the thermistor.

Abstract: A metadata server, a network device and an automatic resource management method for the metadata server are provided. The metadata server connects to a plurality of storage servers and a plurality of user devices, and stores system topology information which records connection relationships between the storage servers and the user devices. The metadata server detects whether a system change event occurs between the metadata server and a target storage server. When the system change event occurs, the metadata server updates the system topology information, generates a notification message in response to the update on the system topology information, and transmits the notification message to at least one relevant user device of the user devices. The at least one relevant user device may include the network device.