A method for forming a groove which enable exact formation of vertical wall surface and a method for manufacturing an optical waveguide element such as an optical switch and an optical multiplexerdemultiplexer applying this forming method are provided. The detector is responsive to a second particle or radiation formed by decay of the radioactive sample. The system includes an ASR recognition server used to assist in adding a new contact to the PAB, and also to match the spoken name gathered with the possible data augmented data as extracted from a system-resident white pages, or other source, such as an external white pages. The amplifier circuit amplifies an input signal carried from the read head through the interconnect, yielding an amplified input output signal. Preferably, the configurable barrier is composed of at least one roller door located between the blower and the evaporator core.