Results 121 to 130 of about 47,153 (310)
Mechanical design problems associated with turbopump fluid film bearings [PDF]
Most high speed cryogenic turbopumps for liquid propulsion rocket engines currently use ball or roller contact bearings for rotor support. The operating speeds, loads, clearances, and environments of these pumps combine to make bearing wear a limiting ...
Evces, Charles R.
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Early versus late amniotomy during twin labor
International Journal of Gynecology &Obstetrics, EarlyView.Abstract Objective This study evaluates whether timing of amniotomy affects labor characteristics and maternal and neonatal outcomes in twin deliveries. Methods This retrospective study was conducted at a single academic medical center and included dichorionic diamniotic (DCDA) twin pregnancies with a normal anomaly scan and a vertex‐presenting leading
Or Eliner +5 more
wiley +1 more source
The Association of Upper Airway Anatomy and Hypoglossal Nerve Stimulation Response in OSA
The Laryngoscope, EarlyView.CT‐derived measurements of tongue and craniofacial anatomy were evaluated in adults undergoing hypoglossal nerve stimulation for obstructive sleep apnea. Relative tongue volume was not significantly associated with treatment response. Exploratory analyses suggest that other anatomic features such as hyoid positions or transverse maxillary dimensions ...
Chau Phung +11 more
wiley +1 more source
Materials and Corrosion, EarlyView.This study examines corrosion of copper and cast iron as candidate canister materials for high‐level radioactive waste disposal in contact with bentonite suspension. The influence of three electrolyte compositions on corrosion behavior under repository‐relevant conditions is assessed.
Louisa Panjiyar +2 more
wiley +1 more source
High Performance Turboalternator and Associated Hardware. 1 - Design of Turboalternator [PDF]
Performance of two stage axial flow turbogenerator with gas bearing rotor support ...
Cohen, R., Gilroy, W. K., Spencer, W. B.
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Polymer Composites, EarlyView.AMPRO BIO/flax fiber composites with different fiber orientations fabricated by vacuum bagging for potential use in biomedical and automotive fields. ABSTRACT Replacing traditional thermoset resins with performing bio‐based alternatives plays a crucial role in the development of new sustainable composite materials.
Elisa Toto +4 more
wiley +1 more source
Programmatic status of NASA's CSTI high capacity power Stirling space power converter program [PDF]
An overview is presented of the NASA Lewis Research Center Free-Piston Stirling Space Power Converter Technology Development Program. This work is being conducted under NASA's Civil Space Technology Initiative (CSTI).
Dudenhoefer, James E.
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Shallow grooves in journal improve air bearing performance [PDF]
, 1968 Bearing designs, which shape the surface to create artificial fluid-film wedges in the absence of any applied radial load, generate radial restoring forces to keep journals from whirling.
Anderson, W. J. +2 more
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Polymer Composites, EarlyView.Composite cylinder under axial and radial compression. ABSTRACT This study examines the hygrothermal degradation of filament‐wound glass fiber‐reinforced epoxy composite tubes designed for application as liners in oil and gas systems, focusing on their response under axial or radial compression.
Anderson L. dos Santos +3 more
wiley +1 more source
Effects of vibration and shock on the performance of gas-bearing space-power Brayton cycle turbomachinery. Part 4: Suppression of rotor-bearing system vibrations through flexible bearing support damping [PDF]
A bearing damper, operating on the support flexure of a pivoted pad in a tilting-pad type gas-lubricated journal bearing, has been designed, built, and tested under externally-applied random vibrations. The NASA Brayton Rotating Unit (BRU), a 36,000 rpm,
Badgley, R. H. +2 more
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