A security system includes within a single module in combination an arming component, a motion sensing component and a notifier component. In one example, a coated optical fiber can include as optical fiber, a primary coating and a secondary coating. Contacts electrically coupling the bit line to portions of the active area line are formed in a region generally defined by the angled intersection of the bit line to the active area line. Simulating the transmission of the symbols could include computing log likelihood ratio values associated with the equivalent bit channels and simulating polar decoding of received symbols using the LLR values. The resistivity limits vary depending upon belt velocity, thickness, material, belt and media dielectric constant, and slot width. The sacrificial material may be removable through any suitable method or device, such as by contacting with a fluid, by temperature, by pressure, or by combustion, ignition, or activation of a fusible or energetic material, or crushing or breaking up of a frangible material.