A ruled line extracting apparatus obtains circumscribed rectangles of pixel concatenation regions included in an input pattern, and calculates the most frequent value of their heights. One described apparatus comprises: a portable manipulandum configured to simulate an element associated with a sports activity; a sensor in communication with the portable manipulandum and configured to detect a movement of the portable manipulandum; an actuator disposed in the portable manipulandum; and a processor in communication with the sensor and the actuator. In addition, since the multiple-precision data is divided into independent single-precision data each having 32 bits, operations for all data can be performed concurrently. The surface cleaning apparatus may comprise a dirt collection chamber having a dirt collection chamber first end, a dirt collection chamber second opposed end and an outer longitudinally extending sidewall. In a preferred embodiment, a rotary pressure transfer device is included to transfer pressure from an outlet stream exiting the separation element to an inlet stream being supplied to the separation element. Each central sheath accommodates a generally T-shaped transverse arm which includes a longitudinal median branch slidably mounted in a sheath and a transverse tubular part welded to a free end of the median branch.