Thin liquid wall fillTIs flowing under the influence of high-velocity turbulent gas streaIllS were studied for the purpose of obtaining an understanding of the Illechanics of filIll cooling. Conditions which insure liquid-filIll attachIllent to solid surfaces without loss of unevaporated liquid to the gas streaIll when siIllple radial-hole injectors are used were found; the IllaxiIlluIll allowa...

This study was undertaken to improve our understanding of the mechanical properties of the respiratory system for a range of diving mammals to improve our ability to predict gas exchange during diving. Our long term aim is to determine the alveolar collapse depth and the pressure where gas exchange cease in marine mammals. We hypothesized that differences in the anatomy of the respiratory syste...

Interconnected compartmental models have been used for decades in physiology and medicine to account for the observed multi-exponential washout kinetics of a variety of solutes (including inert gases) both from single tissues and from the body as a whole. They are used here as the basis for a new class of biophysical probabilistic decompression models. These models are characterized by a relati...

BACKGROUND Deep decompression stops are increasingly common in recreational technical diving. Concerns exist that they shift decompression stress back into slower tissues. A diver recorded an exceptional exposure dive, with deeps stops, on a commercially available dive computer. MATERIAL AND METHODS Using the R package SCUBA tissue inert gas pressures in 17 Bühlmann (ZH-L16A) compartments wer...

This article studies the multi-layer and multi-pass welding of circumferential weld in thick pipe an aviation enterprise, based on static characteristics arc, through data calculations experiments to verify relationship between arc voltage length, proposes use controller accurately adjust real time, improve stability, torch wiggler expand fusion width, meet adaptive adjustment wide weld, build ...

DECOMPRESSION SICKNESS (DCS) was first described in the early 19th century in compressed-air workers and divers who, after decompressing from increased ambient pressure, developed joint pain, paresthesias, and sometimes spinal cord injury or death. In animal experiments, Paul Bert (1) in Paris was able to demonstrate bubble formation after decompression, which he confirmed as due to inert-gas (...

A novel gas ionization sensor using Pd nanoparticle-capped ZnO (Pd/ZnO) nanorods as the anode is proposed. The Pd/ZnO nanorod-based sensors, compared with the bare ZnO nanorod, show lower breakdown voltage for the detected gases with good sensitivity and selectivity. Moreover, the sensors exhibit stable performance after more than 200 tests for both inert and active gases. The simple, low-cost,...