Compositions and methods for forming surfactants, aqueous dispersions, and curing agents are provided. 263 and MPEG-4 ISOIEC standards are compressed to reduce the amount of memory needed to store these streams. The support frame is formed of a material having a first coefficient of thermal expansion and includes a detensioning member formed of a second coefficient of thermal expansion on the peripheral surface of at least one side of the frame to facilitate detensioning of the mask. In some embodiments, systems and methods are provided for determining a rate of change for analyte concentration based on a continuous sensor signal.