A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. An article 10 includes: a flexible dielectric substrate 12 having first and second edges 1416, and a plurality of conductive circuit traces 18 arranged on or within the substrate, wherein each of the traces extends from proximate the first edge 14 to proximate the second edge 16. The invention allows extension of sequences without performing an exhaustive search for sequences with optimal desired properties, as well as extension of the sequence duration to improve the detection of wanted signals via the use of a conventional matched filter, a multi-user detector or an adaptive filterequaliser. Each battery module 110 comprises a gas duct member 130 covering all the safety valves 123 of the cells 120 included therein and forming a gas discharge path 131 between the gas duct member 130 and the safety-valve mounting walls 121a, and a sealing member 160 for hermetically sealing the gaps between each cell case 121 and the gas duct member 130. A current through a cell select line generates a second magnetic field that is orthogonal to the first magnetic field. The method further includes applying a tensile force andor torque to the stuck tubular string; and measuring a response of the tubular string with the free point tool.