Features are disclosed for generating markers for elements or other portions of an audio presentation so that a speech processing system may determine which portion of the audio presentation a user utterance refers to. Optical elements may be selectively situated between pixels to improve the optical performance of the display. The Water Distribution System has applications in specific terrain and climatic conditions such as high bedrock, high groundwater table and permafrost. The guide track device is composed of a plurality of crossed slots. In preferred embodiments control and data acquisition function are separated from the semiconductor strain gage array. Said device comprises a clamping device, a cutting device, and a joining device.