The present invention is used to adapt acoustic models, quantized in subspaces, using adaptation training data. These systems and methods define a unique erased value, such as the hexadecimal value 0FFh, that identifies unused memory records in an event log. The inner tubular member has an inner surface having a first coefficient of friction and an outer surface having a second coefficient of friction greater than the first coefficient of friction. The user may also intervene to perform a variety of tasks following the determination of the amount of bodily fluid.