Abstract: An actively powered wearable weather radar detection device may include a battery, at least one microstrip antenna, and a microcontroller electrically coupled to the battery and the at least one microstrip antenna. The microstrip antenna may be configured to receive a weather radar signal from an airplane, convert the weather radar signal into an electrical signal, and output the electrical signal. The microcontroller may be configured to determine, based on the electrical signal, whether to output an alert signal, and responsive to determining to output an alert signal, send a command signal to an alert device causing the alert device to output the alert signal.

Abstract: A door access control system associates a unique passive identifier with each one of a plurality of doors for which controlled access is desired. Each of the identifiers can be attached to a location adjacent to each respective door. A smart phone with a predetermined scanning application can scan or read a respective identifier of a door for which access is desired. A representation of the door identifier along with an identifier of the smart phone can be transmitted to an access control unit. A data base of the access control unit can be interrogated to determine if that smart phone identifier is authorized to open the designated door. If authorized, then an access command can be transmitted to a local access control module that can release a locking mechanism for the respective door.

Abstract: A door access control system associates a unique passive identifier with each one of a plurality of doors for which controlled access is desired. Each of the identifiers can be attached to a location adjacent to each respective door. A smartphone with a predetermined scanning app can scan, or read a respective identifier of a door for which access is desired. A representation of the door identifier along with an identifier of the smart phone can be transmitter to an access control unit. A data base of the access control unit can be interrogated to determine if that smartphone identifier is authorized to open the designated door. If authorized, an access command can be transmitted to a local access control module which can release a locking mechanism for the respective door.