Results 131 to 140 of about 2,627 (231)

Evaluation of Contact Stress and Fatigue Life for Roller Crowning Profiles in Triple Roller Pitch Bearings

open access: yesWind Energy, Volume 29, Issue 8, August 2026.
ABSTRACT This study investigates the contact stress and rating life of a three‐row pitch bearing for wind turbines, considering the effects of roller crowning. All crowning profiles were logarithmic, and a total of six profiles were examined based on the Romax, ISO 16281, and Fujiwara equations.
SeHan Son   +8 more
wiley   +1 more source

Experimental evaluation of a cost-effective tesla turbine for waste air energy recovery in transportation systems. [PDF]

open access: yesSci Rep
Farghaly MB   +5 more
europepmc   +1 more source

Formulation and Implementation of a Dynamic Roughness Length for Improved Surface Wind Speeds in WRF

open access: yesEarth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Accurate near‐surface winds from the Weather Research and Forecasting (WRF) model are essential for wind‐energy applications, yet persistent biases remain that depend on terrain, season, and land cover. This study develops and evaluates an observation‐informed, time‐varying aerodynamic roughness length for WRF. The roughness length is inferred
S. Srivastava, K. R. Schell
wiley   +1 more source

Adaptive Turbine Replacement Improves Hydropower Flexibility in a Changing Climate

open access: yesWater Resources Research, Volume 62, Issue 8, August 2026.
Abstract Hydropower plants will operate under new conditions as water regimes shift, reservoir operating rules evolve, and the grid requires flexible balancing of wind and solar. Hydropower plant turbine systems are traditionally designed to operate at the highest efficiency within narrow ranges of flow and reservoir levels while deviations from design
Veysel Yildiz   +2 more
wiley   +1 more source

Integrated STEM conceptualizations among teachers following a professional development program

open access: yesSchool Science and Mathematics, Volume 126, Issue 4, Page 318-331, August 2026.
Abstract Because teachers are now more often expected to develop integrated STEM lessons, it is essential to understand their conceptualizations to be able to support them effectively. This qualitative study explored teachers' integrated STEM conceptualizations upon participation in an engineering‐focused professional development program of 4 days ...
Canan Mesutoglu, Devrim Akgündüz
wiley   +1 more source

Movement Models to Predict Low-Altitude Flight of Soaring Birds Using Look-Ahead Environmental Factors. [PDF]

open access: yesEcol Evol
Sandhu R   +9 more
europepmc   +1 more source

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