Results 131 to 140 of about 26,146 (270)

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson   +3 more
wiley   +1 more source

High stability design for new centrifugal compressor [PDF]

open access: yes
It is essential that high-performance centrifugal compressors be free of subsynchronous vibrations. A new high-performance centrifugal compressor has been developed by applying the latest rotordynamics knowledge and design techniques: (1) To improve the ...
Kanki, H.   +6 more
core   +1 more source

Foil seal [PDF]

open access: yes, 1969
Foil seal between parts moving relative to each ...
Ludwig, L. P.
core   +1 more source

Advantages of horizontal centrifugation of platelet‐rich fibrin in regenerative medicine and dentistry

open access: yesPeriodontology 2000, EarlyView.
Abstract The aim of this comprehensive review was to evaluate comparative studies on horizontal and fixed‐angle centrifugation methods for preparing platelet‐rich fibrin (PRF). Furthermore, additional studies utilizing horizontal PRF (H‐PRF) were systematically investigated.
Nima Farshidfar   +6 more
wiley   +1 more source

Propulsion Study for Small Transport Aircraft Technology (STAT) [PDF]

open access: yes
Propulsion requirements were determined for 0.5 and 0.7 Mach aircraft. Sensitivity studies were conducted on both these aircraft to determine parametrically the influence of propulsion characteristics on aircraft size and direct operating cost (DOC ...
Earle, R. V.   +5 more
core   +1 more source

The use of a “horizontal centrifugation protocol” to prepare autologous platelet‐rich fibrin membranes for corneal reconstruction surgery in dogs with complicated corneal ulcerations: A case series

open access: yesVeterinary Ophthalmology, Volume 28, Issue 2, Page 175-189, March 2025.
Abstract Objective The purpose of this case series was to describe the effect of autologous PRF membrane for corneal reconstruction surgery in dogs. PRF membranes made from two healthy dogs unrelated to the current case series were used for PRF histologic analyses. Animals Seven dogs with complicated corneal ulcerations. Procedure A complete ophthalmic
Louise Baadsgaard Bruun   +6 more
wiley   +1 more source

Asynchronous vibration problem of centrifugal compressor [PDF]

open access: yes
An unstable asynchronous vibration problem in a high pressure centrifugal compressor and the remedial actions against it are described. Asynchronous vibration of the compressor took place when the discharge pressure (Pd) was increased, after the rotor ...
Fujikawa, T., Ishiguro, N., Ito, M.
core   +1 more source

Women in space: A review of known physiological adaptations and health perspectives

open access: yesExperimental Physiology, EarlyView.
Abstract Exposure to the spaceflight environment causes adaptations in most human physiological systems, many of which are thought to affect women differently from men. Since only 11.5% of astronauts worldwide have been female, these issues are largely understudied.
Millie Hughes‐Fulford   +4 more
wiley   +1 more source

Rotating pressure measurement system using an on board calibration standard [PDF]

open access: yes
A computer-controlled multichannel pressure measurement system was developed to acquire detailed flow field measurements on board the Large Low Speed Centrifugal Compressor Research Facility at the NASA Lewis Research Center.
Blumenthal, Philip Z.   +2 more
core   +1 more source

Impact of 14 days of head‐down bed rest and an exercise countermeasure on skeletal muscle atrophy, proteome and circulatory cytokines in older adults

open access: yesExperimental Physiology, EarlyView.
Abstract Prolonged bed rest and immobilization have deleterious effects on skeletal muscle mass and function, especially in older adults. These can lead to reduced physical capacity and quality of life. Previous experiments in younger individuals show that exercise can mitigate these effects, but evidence remains scarce and inconclusive in older adults.
Jean‐Christophe Lagacé   +9 more
wiley   +1 more source

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