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All,
As the abstracts come in for the DSMDS Workshop in February, I will post them
for your review. The worldwide response and pre registration has been
extremely positive. Thank you for your support.
Tim
B.R. Wienke, T.R. OLeary Office:
956-761-7986
Technical Diving Operations Fax:
956-761-6039
POB 3867
Nauitec@ao*.co*
South Padre Island, TX 78597
www.nauitec.com
DEEP STOPS AND MODERN DECOMPRESSION STRATEGIES WORKSHOP
NAUI Technical Diving Operations
Tampa, Florida
February 22 - 23, 2003
ABSTRACT
RGBM MODEL UPDATE AND IMPLEMENTATION STATISTICS
FOR RELEASED MIXED GAS TABLES, METERS, AND SOFTWARE
B.R. Wienke and T.R. O'Leary
Los Alamos National Laboratory
Los Alamos, New Mexico
NAUI Technical Diving Operations
Tampa. Florida
The RGBM (Reduced Gradient Bubble Model) is a modern, dual phase,
decompression algorithm forming the basis of recently released tables
(NAUI trimix, helitrox, nitrox, air, constant ppO2 helium, nitrogen,
and trimix), decompression meters (Mares, Dacor, Suunto, Plexus,
Hydrospace), and software (ABYSS, RGBM.ORG). Deep stops with shorter
overall decompression times are characteristic features linked to
RGBM staging after extended exposures. Consistent application
of dual gas (dissolved and bubble) dynamics produces such naturally.
Bubble excitation, gas transfer across tissue-bubble interfaces, and
Boyle expansion-contraction of free phases are considered in the
RGBM. Surfactants comprising the bubble skins are also assigned
equations of state (EOS) which bracket material diffusivities for gas
transfer, tensile strengths, and volumetric response to pressure and
temperature changes. And the RGBM spans recreational to technical
diving within the same parameter space of model constants.
The RGBM has gained tremendous popularity in the past 3 - 5 years,
and has a fine safety record across the board (tables, meters,
software),
with near zero reported cases of DCS in the technical and recreational
sectors. The RGBM grew from the needs of technical divers to more
efficiently stage ascents with coarse grain dissolved gas and bubble
dynamics. The depth, diversity, mix variation, and self consistency
of the RGBM has satisfied that need. And safely in high risk diving
applications. Deep stops and shorter decompression times
are a revolutionary spinoff of that technical diving process.
Abbreviated profile records and data support this modern
decompression strategy.
We look at model underpinnings, data, statistics, application range,
tests, and broad band technical diving supporting RGBM
implementations and growing table, meter, and software usage.
The technical diving community represents a living laboratory of
validation.
And statistics gathered into LANL and NAUI Tec Ops Data Banks attest
to this fact, coming from LANL, WKPP, NAUI Tec Ops, and selected
profile data from the worldwide technical community.
DEEP STOPS AND MODERN DECOMPRESSION STRATEGIES WORKSHOP
NAUI Technical Diving Operations
Tampa, Florida
February 22 - 23, 2003
ABSTRACT
DEEP STOPS AND DEEP HELIUM
B.R. Wienke and T.R. O'Leary
Los Alamos National Laboratory
Los Alamos, New Mexico
NAUI Technical Diving Operations
Tampa. Florida
Deep stops coupled to helium breathing mixtures are a mainstay in
modern technical diving. Both draw naturally from modern
decompression
strategies and are providing divers with safe, efficient, and
flexible staging protocols. Reasons for this are presented, and
helium versus nitrogen profiles are contrasted. Differences between
classical dissolved gas and modern dual phase staging regimens are
also
detailed, underscoring deep stop decompression management and
application.
Actual profiles are a discussion target within the RGBM, a dual
phase model forming the basis for recently released decompression
tables, meters, and software. Corroborative data is highlighted.
Theory, tests, Doppler, and the collective experiences (most of all)
of the technical diving community underscore significance.
Both deep stops and helium based mixtures are changing the
vistas of modern technical diving. So are modern dual phase
decompression models and algorithms which support them on basic
principles. Such models probe the structure of bubbles and track them
over dive profile pressure and temperature changes, that is,
excitation,
gas diffusion across interfaces, Boyle expansion and contraction, and
limit points linked to diving exposure data.
--part1_ad.2216a345.2a940c04_boundary
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Content-Transfer-Encoding: 7bit
<HTML><FONT FACE=arial,helvetica><FONT SIZE=2> </FONT><FONT
COLOR="#ff0000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY="SANSSERIF"
FACE="Arial" LANG="0">All,<BR>
As the abstracts come in for the DSMDS Workshop in February, I will post them
for your review. The worldwide response and pre registration has been extremely
positive. Thank you for your support.<BR>
Tim</FONT><FONT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2
FAMILY="SANSSERIF" FACE="Arial" LANG="0"><BR>
<BR>
B.R. Wienke, T.R. OLeary
&n
bsp; Office: 956-761-7986<BR>
Technical Diving Operations
&n
bsp; Fax: 956-761-6039<BR>
POB 3867
&n
bsp; &nbs
p;
Nauitec@ao*.co*<BR>
South Padre Island, TX
78597 &nb
sp;
; &
nbsp; &nb
sp;
; www.nauitec.com<BR>
<BR>
<P ALIGN=CENTER> DEEP STOPS AND
MODERN DECOMPRESSION STRATEGIES WORKSHOP <BR>
<P
ALIGN=LEFT> &nb
sp;
; NAUI Technical Diving
Operations <BR>
&n
bsp; &nbs
p;
Tampa, Florida <BR>
&n
bsp; &nbs
p; February 22 - 23,
2003 <BR>
<BR>
&n
bsp; &nbs
p;
ABSTRACT<BR>
<BR>
&n
bsp; RGBM MODEL UPDATE AND IMPLEMENTATION STATISTICS <BR>
FOR RELEASED MIXED GAS TABLES, METERS, AND SOFTWARE<BR>
<BR>
<BR>
&n
bsp; &nbs
p; B.R. Wienke and T.R. O'Leary
<BR>
<BR>
&n
bsp; &nbs
p; Los Alamos National Laboratory <BR>
&n
bsp; &nbs
p; Los Alamos, New Mexico <BR>
&n
bsp; &nbs
p; NAUI Technical Diving Operations <BR>
&n
bsp; &nbs
p;
Tampa. Florida <BR>
<BR>
<BR>
The RGBM (Reduced Gradient Bubble Model)
is a modern, dual phase,<BR>
decompression algorithm forming the basis
of recently released tables<BR>
(NAUI trimix, helitrox, nitrox, air,
constant ppO2 helium, nitrogen,<BR>
and trimix), decompression meters (Mares,
Dacor, Suunto, Plexus,<BR>
Hydrospace), and software (ABYSS,
RGBM.ORG). Deep stops with shorter<BR>
overall decompression times are
characteristic features linked to<BR>
RGBM staging after extended
exposures. Consistent application<BR>
of dual gas (dissolved and bubble)
dynamics produces such naturally.<BR>
<BR>
Bubble excitation, gas transfer across
tissue-bubble interfaces, and<BR>
Boyle expansion-contraction of free phases
are considered in the<BR>
RGBM. Surfactants comprising the bubble
skins are also assigned <BR>
equations of state (EOS) which bracket
material diffusivities for gas <BR>
transfer, tensile strengths, and
volumetric response to pressure and<BR>
temperature changes. And the RGBM
spans recreational to technical <BR>
diving within the same parameter space of
model constants. <BR>
<BR>
The RGBM has gained tremendous popularity
in the past 3 - 5 years,<BR>
and has a fine safety record across the
board (tables, meters, software),<BR>
with near zero reported cases of DCS in
the technical and recreational<BR>
sectors. The RGBM grew from
the needs of technical divers to more<BR>
efficiently stage ascents with coarse
grain dissolved gas and bubble<BR>
dynamics. The depth, diversity, mix
variation, and self consistency<BR>
of the RGBM has satisfied that need.
And safely in high risk diving<BR>
applications. Deep stops and shorter
decompression times<BR>
are a revolutionary spinoff of that technical
diving process.<BR>
Abbreviated profile records and data
support this modern<BR>
decompression strategy.<BR>
<BR>
We look at model underpinnings, data,
statistics, application range,<BR>
tests, and broad band technical diving
supporting RGBM<BR>
implementations and growing table, meter,
and software usage. <BR>
The technical diving community represents
a living laboratory of validation.<BR>
And statistics gathered into LANL and NAUI
Tec Ops Data Banks attest<BR>
to this fact, coming from LANL, WKPP, NAUI
Tec Ops, and selected<BR>
profile data from the worldwide technical
community.<BR>
<BR>
<BR>
<P ALIGN=CENTER>
DEEP STOPS AND MODERN DECOMPRESSION STRATEGIES WORKSHOP <BR>
<P
ALIGN=LEFT> &nb
sp;
; &
nbsp; NAUI Technical Diving Operations <BR>
&n
bsp; &nbs
p;
Tampa, Florida <BR>
&n
bsp; &nbs
p;
February 22 - 23, 2003 <BR>
<BR>
&n
bsp; &nbs
p;
ABSTRACT<BR>
<BR>
&n
bsp; &nbs
p; DEEP STOPS AND DEEP
HELIUM <BR>
<BR>
&n
bsp; &nbs
p; B.R. Wienke and
T.R. O'Leary <BR>
&n
bsp; &nbs
p; <BR>
&n
bsp; &nbs
p; Los Alamos National
Laboratory <BR>
&n
bsp; &nbs
p; Los
Alamos, New Mexico <BR>
&n
bsp; &nbs
p; NAUI Technical Diving Operations
<BR>
&n
bsp; &nbs
p;
Tampa. Florida <BR>
<BR>
Deep stops coupled to helium breathing
mixtures are a mainstay in<BR>
modern technical diving. Both draw
naturally from modern decompression<BR>
strategies and are providing divers with
safe, efficient, and <BR>
flexible staging protocols. Reasons
for this are presented, and<BR>
helium versus nitrogen profiles are
contrasted. Differences between<BR>
classical dissolved gas and modern dual
phase staging regimens are also<BR>
detailed, underscoring deep stop
decompression management and application.<BR>
Actual profiles are a discussion target
within the RGBM, a dual<BR>
phase model forming the basis for recently
released decompression<BR>
tables, meters, and software.
Corroborative data is highlighted.<BR>
Theory, tests, Doppler, and the collective
experiences (most of all)<BR>
of the technical diving community
underscore significance.<BR>
<BR>
Both deep stops and helium based mixtures
are changing the<BR>
vistas of modern technical diving.
So are modern dual phase<BR>
decompression models and algorithms which
support them on basic<BR>
principles. Such models probe the
structure of bubbles and track them <BR>
over dive profile pressure and temperature
changes, that is, excitation, <BR>
gas diffusion across interfaces, Boyle
expansion and contraction, and<BR>
limit points linked to diving exposure
data.<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
</P></P></P></P></FONT></HTML>
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