Abstract: A propulsion module of an air mobility vehicle may include a door provided in the housing and opening or closing the opening portion of the housing by a sliding motion of the door; a propeller for providing propulsion to the air mobility vehicle; a link assembly having a first end portion connected to the housing and a second end portion connected to the propeller to pull the propeller into the internal space of the housing through the opening portion or pull the propeller outside the internal space through the opening portion; and a door opening and closing portion coupled to the door and configured for providing an opening and closing force to the door according to an inward-pulling motion or an outward-pulling motion of the propeller.

Abstract: Disclosed are a primary coil unit having four coils independently controllable and a pickup coil unit having four coils also independently controllable. The proposed power transfer system and the proposed power pickup system can satisfy standard compatibility and improve the efficiency of wireless power transmission. The power transfer device is compatible with various types of conventional power pickup systems and capable of expanding compatibility with a new power pickup system to be developed in future by changing the power transfer magnetic flux pattern. The power pickup device is compatible with various types of conventional power transfer systems and capable of expanding compatibility with a power transfer system to be developed in future. The system including both the power transfer device and the power pickup device is more robust against a deviation.

Abstract: A method for formatting a storage medium. The method includes saving management information associated with data that is to be protected from the formatting, the management information indicating where the data to be protected is stored, formatting a management information area of the storage medium where the management information is stored, and recovering the saved management information to the management information area of the storage medium such that the data to be protected is accessible.

Abstract: A method for formatting a storage medium. The method includes saving management information associated with data that is to be protected from the formatting, the management information indicating where the data to be protected is stored, formatting a management information area of the storage medium where the management information is stored, and recovering the saved management information to the management information area of the storage medium such that the data to be protected is accessible.