Abstract: A switchable element is described, which comprises a fluid chamber (111) containing a polar (101) and a non-polar (102) liquid, which are immiscible. The element is further provided with two electrodes (103,104), which are arranged to control the spatial distribution of the liquids, by means of an applied voltage across two the two electrodes. By the addition of surfactant to one or both of the liquids, the actuation voltage of the element is lowered. The element can work for example as an optical device or a motor.

Abstract: A method is described for optimizing recording conditions for writing information on an optical record carrier. The information is written on the record carrier in the form of optically detectable marks, each mark being written by a pulse series of radiation. A series of test patterns is written on the record carrier (1) for the optimization. A jitter detector (11) measures both the leading-edge and trailing-edge jitter of the read signal. The leading-edge jitter is used to optimize the value of a parameter influencing only the leading part of a pulse series. The trailing-edge jitter is used to optimize a parameter influencing only the trailing part of the pulse series.

Abstract: In a computer comprising a computer body for supporting a keyboard and enclosing electronic circuits, several elements are provided including recesses provided on the bottom side of the computer body, leg members for tilting the computer body, the leg members being positioned in the recesses and being rotatable around a supporting shaft of the leg members and slidable along the direction of the axis of the supporting shaft, a spring for forcing the leg members to rotate so as to open from the recesses and to slide in one direction along the supporting shaft, and engagement apparatus for engaging the leg members with the recesses in spite of the force caused by the spring to rotate the leg members, handling portions for facilitating the slide manipulation of the leg members along the supporting shaft are provided on the exposed surface of the leg members while in the recesses, so that it becomes unnecessary to provide additional members for manipulation.