A process for the preparation of linear polymers or block copolymers of styrene by anionic polymerization comprises carrying out the chain termination with an n-alkyl glycidyl ether or a dialkyl ketone. A method of producing a resin composition, comprising the step of mixing an ethylenevinyl alcohol copolymer with a phosphite compound. The integrated tuner includes on-chip local oscillator generation, tunable baseband filters, and DC Offset cancellation. The plate member is configured for linear movement along a length of the inserted pencil. The controller includes a signal compression circuit to cover a wide dynamic range for optical input and output signals, so that resolution for low optical signals is better than resolution for high optical signals.