I wrote above in
post #212.. "
..., it's your home made and invalid measuring / comparison methods and graphs at the center of this problem. These have been used to widely promote a fallacy position."
I was referring to the diagrams Kevin created in the post quoted above. Those are the basis of a great deal of invalid assumptions.
Ross,
Part of the reason why your credibility suffers is that you continue to make claims like this (and the ones below), with no referral to supporting data or references. In contrast, your claims can often be demonstrated to be overtly incorrect by drawing on supporting data or references from multiple sources.
Integral supersaturation is not "home made" and there is nothing wrong with what Kevin is doing with ISS. It is used as a basis for several US Navy probabilistic decompression schedules as clearly articulated here:
Deep stops debate (split from ascent rate thread) - Page 20
....and it is used for much the same purposes as Kevin puts it to in the NEDU study reported by Drs Doolette, Gerth, and Gault (see, for example, page 17 where they say)....
The DSS and sum (fast + slow compartments) integral supersaturation of the tested shallow stops and deep stops dive profiles are also indicated on Figure 7A
Bizarrely, given your claims, It is a central component of the way VPB-M works, as illustrated here:
Deep Stops (rebreather dive charts) - Page 8
1/ The VPM-B+7 that is used in the diagrams above, does not exist, no one can make it, you cannot buy it. It's something that was created by Kevin for this purpose only. It's a stretched out exaggeration, and used to make a non-existent comparison. We are not allowed to just make stuff up.
No, we are not allowed to "make stuff up" Ross. Which is why you cannot say that VPM-B+7 does not exist or that no one can make it. Plus 7 is clearly within the original model parameters (critical radii 0.7 - 1.2 microns) as illustrated here:
VPMechanics4.nb
...and the contextualization of a critical radius of 1.01 (which represents VPM-B +7) with the present debate is provided here:
Deep stops debate (split from ascent rate thread) - Page 62
And Kevin was not the first to use it... the original comparison with VPM-B + 7 and the NEDU results was made by Dr Doolette here:
Deep stops debate (split from ascent rate thread) - Page 20
2/ The use of heatmaps are a relative measure but not an absolute measure. These maps have no dimensions, and its easy to be selective to cause them to show what ever you like. We must keep to standard comparison methods, using standard dimensions and baselines.
The heat map comparisons of supersaturation patterns are perfectly valid when used to compare decompression from dives with identical depths, bottom times and breathing gas; that is, where you start with identical gas loads and distributions in the various tissues. They are also useful for comparing patterns of tissue supersaturation during decompression.
3/ Kevin's has created his own ISS methods: see
post #167. His ISS method has not been tested, proven, or shown to be valid or fit for this purpose.... We are not allowed to just make up measures.
Addressed above. Integral supersaturation is what it is. Kevin has not made up his own methods. You just don't like the results.
The above invalid information and methods, is assisting in the promotion of a fallacy position.
The position that I am taking is well-supported by logic and the available data. Your position, in contrast, is supported by nothing.
Careful readers may notice that the scientist's involved have not offered, shown or presented a scientific or mathematical connection from nedu test to VPM-B, or to any other tech profiles. Instead there are only numerous opinion based explanations and theories made. I have shown and discussed those in
post #116
The science to connect the NEDU study to VPM was first discussed in the NEDU study report where (using integral supersaturation) they compared their profiles to 500,000 other possible profiles, some of which inevitably emulated VPM. A more specific comparison with VPM was presented by Dr Doolette (the NEDU study lead author) at that link to RBW above. Finally, the connection between more typical tech dive profiles prescribed by VPM and alternative approaches has been promulgated by Kevin, using essentially the same integral supersaturation approach as Dr Doolette. All of these comparisons have concluded the same thing.
There is an obvious thread of scientific methodology and logic throughout this sequence and you can deny it as much as you like, but there certainly is science to connect the NEDU study and VPM.
Simon M