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On Wed, 27 Sep 1995, Christopher M. Parrett wrote: thanx for the information, chris. > > Problem is, as soon as we introduce the deeper stops, the shallower stops > begin to change as a result of the extra ongassing/offgassing <G>!! > i assume *change* means: *lengthen?* but this may be a result of using the buhlmann-like algorithm (no iteration) and gradients that are set by tissue supersaturation rather than O2 window. wienke fractions the gradients (or at least he did in his work a few yrs ago) so that the critical gradients are somewhere in between the supersaturation Ms and bubble Gs. when i run vpm code, then plug the deep stops the vpm gives in with a bottom profile into zhl16-like code. i find only a slight increase in shallow stop time. sometimes the stops shorten too. yount's vpm (non-repetitive diving rgbm) is considered dated in it's approach to deco modeling. however, one tantalizing aspect of the schedules produced by the vpm is that they get you out of the water in a total ascent time less than buhlmann (this is an artifact of yount's calibrating to the usn assent times). if there is sufficient "truth" in vpm gradients, then perhaps an optimal model for deco will result. that is, one that keeps you from getting bent--yet lets you out of the water in as short a time as possible. regards, em _____________________________________________________________.sig Eric Maiken email: eapg243@ea*.oa*.uc*.ed* Dept. of Physics o: 714 824-6621 U of California fax: 714 824 2175 Irvine, CA 92715-4575
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