A request from a user to bookmark a segment of content is received at a computing device. The shuttle has a sheet-holding frame that is slidable between a sheet receiving position and a sheet dispensing position beneath knockout cups of the patty-forming apparatus. An activatable element is positioned in the detection beam path for regulating andor limiting the light power level in the detection beam path. The spacer layer does not cover completely a sidewall of the semiconductor fin. Also disclosed are vectors, host cells, antibodies and recombinant methods for producing the polypeptides and polynucleotides, as well as methods for using same. The semiconductor integrated circuit includes: a first logic block that operates based on a first clock; a second logic block that operates based on a second clock having a frequency different from that of the first clock; and a test circuit connected between the first logic block and the second logic block.