added a research item
21st Century Decompression Theory
Here, in Part V, we give only a short comment about pressure units and the various conversion factors used in diving medicine books, as the majority of these books are using imperial units like pounds per square inch (psi) or feet of seawater (fsw), but for serious scientific publications or technical documentation the SI system, the „International System of Units“ is the preferred and used system. These conversion factors are regularly not consistent over all these books as they normally do not specify (water-)temperature nor the density. So they are at times even contradicting and one thing for sure for a physician, i.e. a physical layman: confusing! For an easy and quick assessment with mental arithmetic, say for a ballpark to check absolute pressures, partial pressures of oxygen and the like, especially when required underwater, during real diving, SI is the system of choice.
Für die ÖGTH Jahrestagung am 18.12.2022 in Wien, umreissen wir kurz die folgenden Themen: - Idee & Funktion von Gradientenfaktoren (GF) - Aktuelle Implementierungen - Auswirkungen auf die Tauchgangs-Planung - ganz kurzer Ausflug in die Geschichte - und bieten Literatur zum weiterlesen / experimentieren an.
PoC: proof of concept DIVE: a decompression suite as a free-/shareware for: dive / decompression planning with open system / SCUBA bounce/jump/sprint dives in the TEC & recreational domain saturation diving custom models for: diving at reduced ambient pressure, low water temperature diving with high workload / oxygen consumption C&R diving, Caisson- & tunnel work
This little essay gives a short primer on „catastophe theory“ and tries to give connections to decompression sickness (DCS). The surface of a cuspoid, non-linear potential function and the derivatives are linked to P(DCS), the statistical probability of contracting DCS and to Hemplemans decompression stress assessment.
the following is an essay on some aspects of DCS and the relation to just one of the 7 so-called elementary catastrophes, the cusp. Thus it is not a strict scientific paper, neither in form nor in contents but delineates a couple of preliminary thoughts on the topic, intended to raise awareness or as a basis for further discussions. As well this should help to unearth again the purely mathematical and useful tools for the qualitative study of catastrophic behavior: these have been buried now for the 2nd. time for ca. 40 years. I want to put it together with a pragmatic, physiologic approach to create an innovative and fresh (and, maybe, a completely unsubstantiated … ) new look at dcs-related phenomena.