Results 81 to 90 of about 23,906 (216)
Smart Molecules, EarlyView.A versatile 4D printed approach was developed to fabricate complex and refined photomechanical actuators using crystalline materials, including molecular crystals and covalent organic frameworks. The prepared smart actuators exhibited outstanding photomechanical and photovoltaic performance.
Yujie Liu +8 more
wiley +1 more source
Elementary Applications of a Rotorcraft Dynamic Stability Analysis [PDF]
A number of applications of a rotorcraft aeroelastic analysis are presented to verify that the analysis encompasses the classical solutions of rotor dynamics, and to examine the influence of certain features of the model.
Johnson, W.
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Lattices of hydrodynamically interacting flapping swimmers
, 2019 Fish schools and bird flocks exhibit complex collective dynamics whose self-organization principles are largely unknown. The influence of hydrodynamics on such collectives has been relatively unexplored theoretically, in part due to the difficulty in ...
Oza, Anand U. +2 more
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Maximizing the detection probabilities of dusky grouse for population monitoring
Wildlife Biology, EarlyView.Despite its status as a game species in the western USA, rigorous monitoring of dusky grouse Dendragapus obscurus populations is limited. Obtaining an adequate number of observations for effective population monitoring of dusky grouse is challenging due to difficult‐to‐reach montane habitats, cryptic behaviors, and limited personnel, time, and funds at
Elizabeth A. Leipold +2 more
wiley +1 more source
Comparison of calculated and measured helicopter rotor lateral flapping angles [PDF]
Calculated and measured values of helicopter rotor flapping angles in forward flight are compared for a model rotor in a wind tunnel and an autogiro in gliding flight.
Johnson, W.
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Wildlife Biology, EarlyView.Roe deer is a species that hides their neonates as an anti‐predator strategy. This may prove efficient against mammalian predators, such as the red fox; however, it might be an ecological trap as large numbers of fawns are killed by tractors with harvesters each year during grass harvest.
Thomas Vogler +2 more
wiley +1 more source
Potential Correlation Between Bombus lantschouensis Thoracic Morphology and Flight Behavior
Integrative Zoology, EarlyView.Potential correlation between Bombus lantschouensis thoracic morphology and flight behavior. ABSTRACT Remarkably little modern work has investigated the thoracic structures of insects and their relationship to flight locomotion. Most studies focus exclusively on either morphology or flight kinematics.
Wenjie Li +19 more
wiley +1 more source
Intermittent Gliding in the Hunting Flight of the Kestrel, Falco tinnunculus L. [PDF]
, 1983 The hunting flight of the kestrel (Falco tinnunculus) consists of short bouts of flight at wind speed against the wind with the eyes in a fixed position relative to the ground, and of short flights from one such position to the next.
Daan, S.,, Videler, J.J.,, Weihs, D.,
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Continuous breakdown of Purcell's scallop theorem with inertia
, 2007 Purcell's scallop theorem defines the type of motions of a solid body - reciprocal motions - which cannot propel the body in a viscous fluid with zero Reynolds number. For example, the flapping of a wing is reciprocal and, as was recently shown, can lead
Alexander R. M. +3 more
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Methods in Ecology and Evolution, EarlyView.Abstract Capturing the high‐speed behaviour of nocturnal animals remains technically challenging because conventional video systems require intense illumination that disrupts natural activity. Event‐based vision sensors (EVS) overcome this constraint, yet their ecological uptake has been slow owing to a lack of software capable of analysing the sparse,
Yu Teshima +5 more
wiley +1 more source