Helium in Deep Diving and Caisson Working
نویسندگان
چکیده
منابع مشابه
Respiratory changes with deep diving.
Deep diving refers to saturation diving to a depth of more than 180 m (1.9 MPa ambient pressure). In the 1990s diving to 400 m may be necessary on the Norwegian continental shelf. The safety margins are narrow and the respiratory system is subject to great strain at such depths. The respiratory resistance increases and the dynamic lung volumes are reduced as the pressure increases due to enhanc...
متن کاملSuction Caisson Anchors - a Better Option for Deep Water Applications
As offshore exploration and development of oil fields reach water depths of 1,000 to 3,000 m, novel methods of anchoring production platforms become attractive due to cost savings associated with installation. Surface production systems that are viable in these water depths include Tension Leg Platforms (TLP), spar platforms, and laterally moored ship-shaped and semisubmersible vessels. Possibl...
متن کامل[Retinal vein occlusion and deep-sea diving].
We report a case of retinal vein occlusion after breath-holding diving. After one hour of diving at a maximal depth of eight meters, each apnea no longer than one minute, the patient complained of a diminution of the visual acuity in the left eye. Ophthalmological examination revealed an occlusion of the superior branch of the central vein of the retina in the left eye. This could be considered...
متن کاملPoor flight performance in deep-diving cormorants.
Aerial flight and breath-hold diving present conflicting morphological and physiological demands, and hence diving seabirds capable of flight are expected to face evolutionary trade-offs regarding locomotory performances. We tested whether Kerguelen shags Phalacrocorax verrucosus, which are remarkable divers, have poor flight capability using newly developed tags that recorded their flight air ...
متن کاملDeep Diving into Africa’s Inter-Country Latencies
The Internet in Africa is evolving rapidly, yet remains significantly behind other regions in terms of performance and ubiquity of access. This clearly has negative consequences for the residents of Africa, but also has implications for organisations designing future networked technologies that might see deployment in the region. This paper presents a measurement campaign methodology to explore...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1928
ISSN: 0028-0836,1476-4687
DOI: 10.1038/121577a0