Results 41 to 50 of about 88,387 (286)

The aerodynamic effects of wing–wing interaction in flapping insect wings [PDF]

open access: yes, 2005
We employed a dynamically scaled mechanical model of the small fruit fly Drosophila melanogaster (Reynolds number 100–200) to investigate force enhancement due to contralateral wing interactions during stroke reversal (the 'clap-and-fling').
Dickinson, Michael   +2 more
core   +2 more sources

Physical Modelling of Tidal Stream Turbine Wake Structures under Yaw Conditions

open access: yesEnergies, 2023
Tidal stream turbines may operate under yawed conditions due to variability in ocean current directions. Insight into the wake structure of yawed turbines can be essential to ensure efficient tidal stream energy extraction, especially for turbine arrays ...
Can Zhang   +5 more
doaj   +1 more source

Enhancing Wind Farm Performance through Axial Induction and Tilt Control: Insights from Wind Tunnel Experiments

open access: yesEnergies, 2023
Static axial induction control and tilt control are two strategies that have the potential to increase power production in wind farms, mitigating wake effects and increasing the available power for downstream turbines.
Guillem Armengol Barcos   +1 more
doaj   +1 more source

Sensitivity and Uncertainty of the FLORIS Model Applied on the Lillgrund Wind Farm

open access: yesEnergies, 2021
Wind farms experience significant efficiency losses due to the aerodynamic interaction between turbines. A possible control technique to minimize these losses is yaw-based wake steering.
Maarten T. van Beek   +2 more
doaj   +1 more source

Wind Farm Wake-Steering Exploration During Grid Curtailment [PDF]

open access: yes2020 American Control Conference (ACC), 2020
Wind farm wake steering is an active topic in the wind community. Yaw-induced wake steering in wind farms has shown significant increases in total wind farm power output. Unfortunately, sensor uncertainty and model uncertainty often make pure model-driven approaches less effective.
Jordan Hoyt, Peter Seiler 0001
openaire   +1 more source

Stroke with unknown time of symptom onset: baseline clinical and magnetic resonance imaging data of the first thousand patients in WAKE-UP (efficacy and safety of mri-based thrombolysis in wake-up stroke: a randomized, doubleblind, placebo-controlled trial) [PDF]

open access: yes, 2017
Background and Purpose—We describe clinical and magnetic resonance imaging (MRI) characteristics of stroke patients with unknown time of symptom onset potentially eligible for thrombolysis from a large prospective cohort.
Boutitie, Florent   +18 more
core   +2 more sources

Development and validation of a hybrid data-driven model-based wake steering controller and its application at a utility-scale wind plant [PDF]

open access: yesWind Energy Science
Despite the promise of wind farm control through wake steering to reduce wake losses, the deployment of the technology to wind plants has historically been limited to small and simple demonstrations.
P. Bachant   +6 more
doaj   +1 more source

X-ray detector on 2U cubesat BeEagleSAT of QB50 [PDF]

open access: yes, 2013
BeEagleSAT is a 2 Unit cubesat to be launched within the EU FP7 project QB 50. It is been produced by Istanbul Technical University and Turkish Air Force Academy.
Aslan, Rustem   +4 more
core   +1 more source

Hijacking emergency granulopoiesis: Neutrophil ontogeny and reprogramming in cancer

open access: yesMolecular Oncology, EarlyView.
Neutrophils are highly plastic innate immune cells; their functions in cancer extend beyond the tumour microenvironment. This Review summarises current understanding of neutrophil maturation and heterogeneity and highlights tumour‐induced granulopoiesis as a systemic programme that expands immature, immunosuppressive neutrophils via tumour‐derived ...
Gabriela Marinescu, Yi Feng
wiley   +1 more source

Measurements of roll, steering, and the far-field wake in track cycling

open access: yesScientific Reports, 2022
AbstractA series of measurements taken with two instrumented track bicycles in a velodrome are presented. The bicycle wheel speed, cadence, roll angle, steering angle, power, and airspeed are recorded. The experimentally-measured values are compared to existing theoretical models of roll and steering angles.
Shaun Fitzgerald   +3 more
openaire   +3 more sources

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