HKBM and DCAP?

jasondrake · 12th July 2007, 09:49

Can anyone point me towards any info on these two models. They are part of the Nautilus Software I'm using but I can't find out much about them. Who uses them? Any data or studies? Any info at all would be cool,
thanks
Jason

lizardland · 12th July 2007, 11:44

HKBM = Hamilton Kenyon Bubble Model. DCAP was Bill Hamilton's proprietary table calculating program.

I've used the Hamilton M11F6 haldanian model for years and been quite happy with it. I tried the demo of Nautilus but they never sent the demo activation code so I thought forget it, plenty of other deco software around.

Cheers,

Stuart

JS1scuba · 12th July 2007, 14:34

Quote: (Originally Posted by jasondrake)

Can anyone point me towards any info on these two models. They are part of the Nautilus Software I'm using but I can't find out much about them. Who uses them? Any data or studies? Any info at all would be cool,
thanks
Jason

DCAP is a program created by Hamitlon Research (Decompression Computational Analysis Program) in that industrial strength program is the Hamilton-Workman-Schreiner-Kenyon neo-haldanean model that has been used for years and is the basis of the Key West Consortium tables that we used during the 1990s through today. They are virtually bend free (meaning we have no reports of bends on them) they have reasonably deep cielings and realtively long shallow tails.

The Hamilton-Kenyon Bubble Model (HKBM) is a melding of Haldane’s method of calculating inert gas uptake into theoretical compartments. Keller’s method of summing the partial pressures of multiple inert gas uptake is employed as well. In the Hamilton-Kenyon Bubble Model, the half-times for each compartment are taken from the Hamilton-Kenyon decompression model that has
years of reliable decompression schedule production.

1. Rather than using Workman’s M-value methodology for determining allowable supersaturation for the theoretical compartments, Yount’s “tiny-bubble” method of calculating allowable compartment supersaturation is employed.

Application of Yount’s method to Hamilton-Kenyon’s gas uptake model produces decompression schedules that have initial decompression stops up to twice as deep as conventional dissolved gas models and shallow decompression stop times that are significantly shorter than dissolved gas models call for.

This combination of Hamilton, Kenyon, and Yount produce decompression schedules that algorithmically call for deep stops, rather than arbitrarily adding them into a dissolved gas model and having to “pay for it” at the shallow end of the schedule. The shallow stops are not arbitrarily shortened.

You can find a complete discussion of these models and how NAUTILUS works in the NAUTILUS USER GUIDE available at this link.

NAUTILUSDIVEPLANNER.COM

select updates and then NAUTILUS USER MANUAL.

Cheers

JDS

jasondrake · 12th July 2007, 17:52

Thanks for your time Joel, much appreciated. HKBM produces a lovely looking curve (if you know what I mean) looking forward to trying it in anger!

DonalWalsh · 12th July 2007, 18:12

Hi there Joel. Any news on my activation code?

JS1scuba · 12th July 2007, 20:39

Quote: (Originally Posted by DonalWalsh)

Hi there Joel. Any news on my activation code?

It sure looks like that was sent to you in april. I will look it up and send again.

cheers

JS1scuba · 12th July 2007, 20:41

Quote: (Originally Posted by jasondrake)

Thanks for your time Joel, much appreciated. HKBM produces a lovely looking curve (if you know what I mean) looking forward to trying it in anger!

The curve on HKBM is quite nice. It took me a little while when i first started to use it to get used to the deeper stops and going through back gas (OC) now with the CCR it's a no brainer. I run Cochran EMC20H units and it matches up nicely to the HKBM profiles. I have probably run close to 300 or more personal dives on HKBM with very nice results.

Cheers

jds

JS1scuba · 12th July 2007, 23:45

Quote: (Originally Posted by DonalWalsh)

Hi there Joel. Any news on my activation code?

I just sent it to you again.

JDS

hirudin · 13th July 2007, 01:56

Hi Joel,

I too, am still waiting for a replacement activation code.

Thanks,

-Jesse-

DonalWalsh · 26th July 2007, 17:47

Quote: (Originally Posted by JS1scuba)

I just sent it to you again.

JDS

Thanks Joel will try again.

12th July 2007, 09:49	#1 (permalink)
jasondrake New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Nov 2005 Location: Completely homeless Posts: 76	HKBM and DCAP? Can anyone point me towards any info on these two models. They are part of the Nautilus Software I'm using but I can't find out much about them. Who uses them? Any data or studies? Any info at all would be cool, thanks Jason
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12th July 2007, 11:44	#2 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,302	Re: HKBM and DCAP? HKBM = Hamilton Kenyon Bubble Model. DCAP was Bill Hamilton's proprietary table calculating program. I've used the Hamilton M11F6 haldanian model for years and been quite happy with it. I tried the demo of Nautilus but they never sent the demo activation code so I thought forget it, plenty of other deco software around. Cheers, Stuart __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
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12th July 2007, 14:34	#3 (permalink)
JS1scuba RebreatherWorld Sponsor Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Join Date: Oct 2005 Location: Lake Havasu City, AZ - USA Posts: 494	Re: HKBM and DCAP? Quote: (Originally Posted by jasondrake) Can anyone point me towards any info on these two models. They are part of the Nautilus Software I'm using but I can't find out much about them. Who uses them? Any data or studies? Any info at all would be cool, thanks Jason DCAP is a program created by Hamitlon Research (Decompression Computational Analysis Program) in that industrial strength program is the Hamilton-Workman-Schreiner-Kenyon neo-haldanean model that has been used for years and is the basis of the Key West Consortium tables that we used during the 1990s through today. They are virtually bend free (meaning we have no reports of bends on them) they have reasonably deep cielings and realtively long shallow tails. The Hamilton-Kenyon Bubble Model (HKBM) is a melding of Haldane’s method of calculating inert gas uptake into theoretical compartments. Keller’s method of summing the partial pressures of multiple inert gas uptake is employed as well. In the Hamilton-Kenyon Bubble Model, the half-times for each compartment are taken from the Hamilton-Kenyon decompression model that has years of reliable decompression schedule production. 1. Rather than using Workman’s M-value methodology for determining allowable supersaturation for the theoretical compartments, Yount’s “tiny-bubble” method of calculating allowable compartment supersaturation is employed. Application of Yount’s method to Hamilton-Kenyon’s gas uptake model produces decompression schedules that have initial decompression stops up to twice as deep as conventional dissolved gas models and shallow decompression stop times that are significantly shorter than dissolved gas models call for. This combination of Hamilton, Kenyon, and Yount produce decompression schedules that algorithmically call for deep stops, rather than arbitrarily adding them into a dissolved gas model and having to “pay for it” at the shallow end of the schedule. The shallow stops are not arbitrarily shortened. You can find a complete discussion of these models and how NAUTILUS works in the NAUTILUS USER GUIDE available at this link. NAUTILUSDIVEPLANNER.COM select updates and then NAUTILUS USER MANUAL. Cheers JDS __________________ Joel Silverstein, VP COO Tech Diving Limited a Division of Scuba Training and Technology Inc. http://www.nautilusdiveplanner.com http://www.nobubblediving.com
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12th July 2007, 17:52	#4 (permalink)
jasondrake New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Nov 2005 Location: Completely homeless Posts: 76	Re: HKBM and DCAP? Thanks for your time Joel, much appreciated. HKBM produces a lovely looking curve (if you know what I mean) looking forward to trying it in anger!
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12th July 2007, 18:12	#5 (permalink)
DonalWalsh Third Class Snorkeller Current Rebreather/s: Megalodon Other Rebreather/s: Evolution Join Date: Nov 2005 Location: Moving to London in Sept.....which way to the South Coast?? Posts: 136	Re: HKBM and DCAP? Hi there Joel. Any news on my activation code? __________________ "Anybody can be a bum. All you need is the right girl, the right bar, and the right friends. They will see you off. They will christen your dumpster for you. "- Bill Hicks
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12th July 2007, 20:39	#6 (permalink)
JS1scuba RebreatherWorld Sponsor Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Join Date: Oct 2005 Location: Lake Havasu City, AZ - USA Posts: 494	Re: HKBM and DCAP? Quote: (Originally Posted by DonalWalsh) Hi there Joel. Any news on my activation code? It sure looks like that was sent to you in april. I will look it up and send again. cheers __________________ Joel Silverstein, VP COO Tech Diving Limited a Division of Scuba Training and Technology Inc. http://www.nautilusdiveplanner.com http://www.nobubblediving.com
(Offline)

12th July 2007, 20:41	#7 (permalink)
JS1scuba RebreatherWorld Sponsor Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Join Date: Oct 2005 Location: Lake Havasu City, AZ - USA Posts: 494	Re: HKBM and DCAP? Quote: (Originally Posted by jasondrake) Thanks for your time Joel, much appreciated. HKBM produces a lovely looking curve (if you know what I mean) looking forward to trying it in anger! The curve on HKBM is quite nice. It took me a little while when i first started to use it to get used to the deeper stops and going through back gas (OC) now with the CCR it's a no brainer. I run Cochran EMC20H units and it matches up nicely to the HKBM profiles. I have probably run close to 300 or more personal dives on HKBM with very nice results. Cheers jds
(Offline)

12th July 2007, 23:45	#8 (permalink)
JS1scuba RebreatherWorld Sponsor Current Rebreather/s: Sport Kiss Classic Kiss Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss MK 15.X Join Date: Oct 2005 Location: Lake Havasu City, AZ - USA Posts: 494	Re: HKBM and DCAP? Quote: (Originally Posted by DonalWalsh) Hi there Joel. Any news on my activation code? I just sent it to you again. JDS
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13th July 2007, 01:56	#9 (permalink)
hirudin New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2005 Location: rock-hopper Posts: 52	Re: HKBM and DCAP? Hi Joel, I too, am still waiting for a replacement activation code. Thanks, -Jesse-
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26th July 2007, 17:47	#10 (permalink)
DonalWalsh Third Class Snorkeller Current Rebreather/s: Megalodon Other Rebreather/s: Evolution Join Date: Nov 2005 Location: Moving to London in Sept.....which way to the South Coast?? Posts: 136	Re: HKBM and DCAP? Quote: (Originally Posted by JS1scuba) I just sent it to you again. JDS Thanks Joel will try again. __________________ "Anybody can be a bum. All you need is the right girl, the right bar, and the right friends. They will see you off. They will christen your dumpster for you. "- Bill Hicks
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