From 3f060c5c282d654f044815dc688c49f33ed9d21f Mon Sep 17 00:00:00 2001 From: Rick Walsh Date: Thu, 3 Nov 2016 13:17:10 +1100 Subject: User manual: replace heatmap comparison graphic The new heatmap graphic reflects how the heatmap is now displayed. Also update text describing graphic. Signed-off-by: Rick Walsh Signed-off-by: Dirk Hohndel --- Documentation/images/tissueHeatmap.jpg | Bin 81563 -> 118810 bytes Documentation/user-manual.txt | 17 +++++++++++++---- 2 files changed, 13 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/images/tissueHeatmap.jpg b/Documentation/images/tissueHeatmap.jpg index a35c64e7b..4c12bc6f7 100644 Binary files a/Documentation/images/tissueHeatmap.jpg and b/Documentation/images/tissueHeatmap.jpg differ diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt index 2d6468ed8..c6a4ff3bc 100644 --- a/Documentation/user-manual.txt +++ b/Documentation/user-manual.txt @@ -2430,10 +2430,19 @@ http://www.tek-dive.com/portal/upload/M-Values.pdf[Understanding M-values by Eri Since the colours of the heat map are not affected by the gradient factor(s), the heat map is also applicable when using the VPM-B decompression model. -The image below shows the profiles and heat maps for two dives to about 45m. -The inert gas pressures in the fast tissues -rise much more rapidly, going through the sequence from light blue to light green and orange. -In contrast, the slow tissues accumulate inert gas at a much slower rate. +The image below compares the profiles and heat maps for two planned decompression dives to 60m: +the first using the Bühlmann decompression model, the second using the VPM-B decompression model. +Both profiles have the same total decompression time, but the VPM-B model requires deeper stops early in the acent phase. + +In both profiles, the inert gas pressures in the faster tissues rise much more rapidly than the slower tissues during +the descent and bottom phase, with the colors transitioning from light blue through blue and purple to black. +Similarly, the inert gas pressure in the fast tissues reduces more rapidly than the slow tissues at each decompression stop, +with colors transitioning from red, orange and yellow to green and black. + +The comparison of the two profiles and heatmaps shows that by including deep stops, the oversaturation gradient in the +faster tissues early in ascent phase is reduced. +However, on-gassing of slower tissues continues during the deep stops, which leads to greater oversaturation gradient +in slower tissues at the end of the dive. image::images/tissueHeatmap.jpg["Figure: Inert gas tissue pressure heat-map",align="center"] =================================================================================== -- cgit v1.2.3-70-g09d2