Abstract: A radially expandable multiple tubular member apparatus includes a first tubular member and a second tubular member engaged with the first tubular member forming a joint. A sleeve overlaps and couples the first and second tubular members at the joint.

Abstract: A method is described for controlling an optical disc drive apparatus (1) of a type comprising: scanning means (30) for scanning a record track of an optical disc (2), said scanning means (30) comprising at least one read/write element (34) to be positioned with respect to the disc (2), and at least one optical detector (35) for generating a read signal (SR); actuator means (50) for controlling the positioning of said at least one read/write element (34); a control circuit (290) for receiving said read signal (SR) and generating at least one actuator control signal (SCR) on the basis of at least one signal component of said read signal (SR), the control circuit (290) having at least one variable gain (?); said control circuit (290), said actuator means (50), said read/write element (34), and said optical detector (35) defining a control loop (200) having a critical frequency (?CP); the method comprises the steps of: selectively setting the gain (?), for signal components having a frequency in a predefined ran