Abstract: The present invention relates to electric bicycle speed control device and method. According to the present invention, a torque of a motor for driving a wheel is controlled so that a speed of a pedal driven by a user follows a speed of the wheel, and a torque of the pedal is also controlled by applying an assist level according to the torque of the motor. Therefore, even in an electric bicycle with a chain, it is possible to feel a feeling of the pedal like a bicycle with a chain, and it is possible to adjust the force applied to the pedal according to the assist level.

Abstract: A method for storing and retrieving telemetry which can reduce the size of a data storage tape and the time for retrieving data by overcoming the problems in a conventional satellite control system wherein all telemetry received from a satellite are stored without being subject to a filtering operation in a hard disk or memory of a computer for a predetermined time, and when needs arise for replaying previously stored data, a tape which stores required data is first located and mounted on a driver in order to load the required data. In accordance with the method of the present invention, data is filtered with respect to a variation of each telemetry. The data is stored step by step according to the period for which data should be stored. The data which should be stored for a long term is compressed and stored as an average value, maximum value, minimum value and variance of daily data. The generation and storage of long term data are offline processed.

Abstract: A roof drip construction for an automobile which includes a roof panel and a side outer panel welded to each other forming a rain passage whose lower width is larger than its upper width. A mould having a plurality of wings is fitted in the rain passage while the wings are in close contact with the inside walls of the roof panel and the side outer panel defining the rain passage. Stud pins mounted on the roof panel are fitted in the mould so as to prevent the mould from being removed out of the rain passage. A rain gutter is formed at the side outer paenl to prevent raindrops in the rain passage from flowing downward along the side door of the automobile.