The present invention relates to compounds and methods which may be useful as inhibitors of HIF pathway activity for the treatment or prevention of cancer and other hypoxia-mediated diseases. The degrees of opening of an air mix damper and a bypass openclose damper are controlled by actuators that respond in accordance with a temperature detected by the non-contact sensor so the blowing temperature will ultimately approach a target value. If, during execution of the process, the directory is partitioned into subdirectories, then a second index is maintained for each of the subdirectories to indicate how far the read has progressed in each of the subdirectories.