A luminescence device comprising a pair of electrodes and an organic compound layer disposed therebetween. In certain embodiments, multiple compressible elongated member passages may be provided, or an elongated member passage may be U-shaped and closable by a closure member. The relay tool exchange device is mounted on the first column and has a guide device, a frame, a tool case and a driving device. The braking force of the braking system is obtainable at low rotational or rolling speed of the roller to be braked and is small and increases with increasing rotational or rolling speed of the roller to be braked. Further, this invention relates to novel compounds, which act as ligands for the \u03b17 nAChR subtype, methods of preparing such compounds, compositions containing such compounds, and methods of use thereof. The invention monitors a threshold, which can be based on several factors, to determine when system conditions are such that secondary activities should be conducted.