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Pressure Chamber Tests for Selection of Aircrew
ORL, 2010The Eustachian tube function requested from flying personnel today is generally regarded as acceptable if hearing and otoscopic findings are normal and there is no history of ear disease. Since increasing performance of modern aircrafts place more rigorous demands on the equilibrating capacity of the Eustachian tube and difficulty to clear the ears ...
P, Groth, O, Tjernström
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Pressure Chamber Tympanometry in Diving Candidates
Annals of Otology, Rhinology & Laryngology, 1991The currently recommended examination for diving fitness ascertains middle ear autoinflation ability only under surface pressure conditions. The purpose of our study was to document and quantify middle ear pressure equalization failure during simulated dives among diving candidates who had otherwise met the otologic criteria for diving fitness.
A, Shupak +3 more
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THE SCOPE OF A PRESSURE CHAMBER IN SURGERY AND ANAESTHESIA
Survey of Anesthesiology, 1962An account has been given of a pressurized chamber in wl)ich the physiological advantages of administering oxygen in an ambient pressure of 2 atmospheres are reviewed. Their application to medical and surgical problems is considered with special reference to the use of the chamber for open-heart surgery), the treatment of severe cases of gas-poisoning ...
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Current Status of Pressure Chamber Treatment
Otolaryngologic Clinics of North America, 1980Forty-five patients with unilateral and one patient with bilateral Meniere's disease were exposed to underpressure in a pressure chamber during an acute attack that was primary in 24 and recurrent in 23. The patients were instructed to avoid active equilibration during reduction of the pressure, in order to induce an overpressure in the middle ear ...
O, Tjernström +3 more
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Pressure vessel rupture within a chamber: The pressure history on the chamber wall
Experimental Thermal and Fluid Science, 1991Abstract Generally there are a large number of pressure vessels containing high-pressure gas on power station and chemical plant sites. In many instances, particularly in a power plant, these vessels are within the main building. If one were to fail, the surrounding structures would be exposed to blast loads and the forces resulting from jets of ...
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Pressure and Temperature Modulation in a Hot Isostatic Pressure Chamber
2024 46th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)In medical device manufacturing, hot isostatic pressing (HIP) is a standard additive manufacturing process used to consolidate and remove microporosities of biomedical implants to improve material strength. The ability to monitor and regulate temperature and pressure during a HIP cycle is critical to achieving the desired densification, ensuring ...
Joshua Tesoro +4 more
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1967
Abstract : The pressure containment capability of a monobloc cylindrical chamber that remains elastic is limited by the mechanical strength of the chamber material to values of about 100,000 pounds per square inch. Higher pressures can be contained by using a shrink-fit construction or autofrettage and these techniques provide approximately twice the ...
Arnold E. Seigel, Victor C. Dawson
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Abstract : The pressure containment capability of a monobloc cylindrical chamber that remains elastic is limited by the mechanical strength of the chamber material to values of about 100,000 pounds per square inch. Higher pressures can be contained by using a shrink-fit construction or autofrettage and these techniques provide approximately twice the ...
Arnold E. Seigel, Victor C. Dawson
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High-pressure chamber measurements
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2006Results from the design of a high-pressure chamber and its components, recently developed at the Lund Institute of Technology, are presented. The results show that at high pressures, when the lubricants have solidified, the density varies linearly with the pressure and the shear strength also increases nearly linearly with pressure.
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DESIGN OF PRESSURE IONIZATION CHAMBERS
Review of Scientific Instruments, 1932Two ionization chambers are described which are suitable for the measurement of hard x-rays and γ-rays. One of them is designed to be used at 30 atmospheres and the other from 60 to 100 atmospheres. The method of assembling and testing the chambers is described.
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The Significance of the Pressure Chambers of the Eye
1980The strategy of ocular surgery is on the one hand tissue strategy, dealing with the division, displacement and uniting of tissues. On the other hand it is what one might call space strategy, dealing with the creation and maintenance of spaces between tissues for purposes of pressure equalization and fluid circulation.
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