Results 151 to 160 of about 3,112 (223)
Concepts for Multi-Speed Rotorcraft Drive System - Status of Design and Testing at NASA GRC [PDF]
In several studies and on-going developments for advanced rotorcraft, the need for variable/multi-speed capable rotors has been raised. Speed changes of up to 50 percent have been proposed for future rotorcraft to improve vehicle performance.
Handschuh, Robert F. +2 more
core +1 more source
Mechanochemical Treatment of Cellulose: A Strategy for Developing Functional Biocomposite Materials
Polymer Engineering &Science, Volume 66, Issue 2, Page 662-688, February 2026.Mechanochemistry as an integrated approach for combining fiber defibrillation, activation, surface functionalization, and cellulose‐based composite fabrication in a single or reduced number of steps. ABSTRACT Cellulose‐based biocomposites are attracting increasing scientific and industrial interest due to their sustainable origin, biodegradability, and
Murilo O. da Luz +3 more
wiley +1 more source
Free surface oscillation driven by rotating stirrer. [PDF]
Eur Phys J E Soft MatterWatamura T, Iwata R, Sugiyama K.
europepmc +1 more source
Artificial Tears: A Systematic Review. [PDF]
Clin Optom (Auckl), 2023 Semp DA +4 more
europepmc +1 more source
Small Methods, Volume 10, Issue 3, 9 February 2026.Design of an injectable porous hydrogel modulating macrophages and their secreted EVs for joint defect repair in the pathology of rheumatoid arthritis. a) The solution containing HA and CS‐MOS, upon mixing with a crosslinker solution, undergoes porous hydrogel formation with the escape of generated CO₂ gas.
Anan Zhang +9 more
wiley +1 more source
Helicopter transmission testing at NASA Lewis Research Center [PDF]
The helicopter has evolved into a highly valuable air mobile vehicle for both military and civilian needs. The helicopter transmission requires advanced studies to develop a technology base for future rotorcraft advances.
Coy, John J., Lewicki, David G.
core +1 more source
Water Resources Research, Volume 62, Issue 2, February 2026.Abstract Intermittent flow is a widely recognized phenomenon across various fields, characterized by the spatial‐temporal fluctuations of the two‐phase topology. However, its implications for solute dispersion and mixing remain insufficiently understood.
Kai Zhang +5 more
wiley +1 more source
Assessment of eye care practices and health belief model factors among adult intensive care unit nurses in public hospitals of Amhara Region, Ethiopia. [PDF]
BMC NursAfenigus AD, Asres HA.
europepmc +1 more source
Scandinavian Journal of Medicine &Science in Sports, Volume 36, Issue 2, February 2026.ABSTRACT Elite performance in Olympic winter sports depends on the interplay among the athlete, equipment, and the snow or ice. This naturally evolves with temperature, humidity, wind, preparation, and contact between the equipment and its surface. Together, these factors continuously rebalance the forces of gravity, aerodynamic drag, and friction ...
Andreas Almqvist +4 more
wiley +1 more source