Results 11 to 20 of about 113,027 (258)

Micro-structures, nanomechanical properties and flight performance of three beetles with different folding ratios [PDF]

open access: yesBeilstein Journal of Nanotechnology, 2022
When beetles are not in flight, their hind wings are folded and hidden under the elytra to reduce their size. This provided inspiration for the design of flapping-wing micro aerial vehicles (FWMAVs).
Jiyu Sun   +5 more
doaj   +2 more sources

Fuzzy Comprehensive Evaluation of Pilot Cadets’ Flight Performance Based on G1 Method

open access: yesApplied Sciences, 2023
In this paper, to better evaluate the flight performance of pilot cadets, a flight performance evaluation index system was constructed based on the task of the traffic pattern, the flight training manual, and interviews with instructors.
Gen Li   +4 more
doaj   +3 more sources

Density of predating Asian hornets at hives disturbs the 3D flight performance of honey bees and decreases predation success [PDF]

open access: yesEcology and Evolution, 2023
Automated 3D image‐based tracking systems are new and promising devices to investigate the foraging behavior of flying animals with great accuracy and precision.
Juliette Poidatz   +4 more
doaj   +2 more sources

You are what you eat – The influence of polyphagic and monophagic diet on the flight performance of bees [PDF]

open access: yesEcology and Evolution
Movement performance of insects is an important measure of physiological fitness and is likely affected by novel stressors associated with global change.
Jula‐Klarissa Krüger   +6 more
doaj   +2 more sources

Attentional Blink in Pilots and Its Relationship With Flight Performance [PDF]

open access: yesFrontiers in Psychology, 2020
ObjectiveIn flight, military pilots need to monitor changes in the external environment and monitor the situation of the aircraft at the same time. Attentional blink (AB) reflects attentional blindness in time.
Fengzhan Li   +3 more
doaj   +2 more sources

Feather holes and flight performance in the barn swallow Hirundo rustica [PDF]

open access: yesAnimal Cells and Systems, 2018
Feather holes are small (0.5–1 mm in diameter) deformities that appear on the vanes of flight feathers. Such deformities were found in many bird species, including galliforms and passerines. Holey flight feathers may be more permeable to air, which could
Piotr Matyjasiak   +4 more
doaj   +2 more sources

Experimental study of the wake interaction between two vertical axis wind turbines

open access: yesWind Energy, 2023
Wakes and wake interactions in wind turbine arrays diminish energy output and raise the risk of structural fatigue; hence, comprehending the features of rotor–wake interactions is of practical relevance.
Ming Huang   +3 more
doaj   +1 more source

On the wake deflection of vertical axis wind turbines by pitched blades

open access: yesWind Energy, 2023
Wake losses are a critical consideration in wind farm design. The ability to steer and deform wakes can result in increased wind farm power density and reduced energy costs and can be used to optimize wind farm designs.
Ming Huang   +2 more
doaj   +1 more source

The Overall Design of Variable Diameter Ducted Fan in the Aircraft

open access: yesAerospace, 2022
Variable diameter rotor can improve the flight performance of the aircraft both in hovering and forward flying and a duct can improve the rotor performance further both in force and efficiency.
Yadong Gao, Yang Xu
doaj   +1 more source

Airplane tracking documents the fastest flight speeds recorded for bats [PDF]

open access: yesRoyal Society Open Science, 2016
The performance capabilities of flying animals reflect the interplay of biomechanical and physiological constraints and evolutionary innovation. Of the two extant groups of vertebrates that are capable of powered flight, birds are thought to fly more ...
Gary F. McCracken   +5 more
doaj   +1 more source

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