Results 21 to 30 of about 39,518 (215)
Behavioural traits of individual homing pigeons, Columba livia f. domestica, in their homing flights. [PDF]
PLoS ONE, 2018 Homing tracks of two groups of pigeons, Columba livia f. domestica, were analyzed in view of difference between individual birds and correlations between characteristic variables, looking at the initial phase while the pigeons were still at the release ...
Ingo Schiffner +3 more
doaj +1 more source
Advances in Astronomy, 2017 Keeping the flying formation of spacecraft is a key problem which needs to be solved in deep space exploration missions. In this paper, the nonlinear dynamic model of formation flying is established and a series of transformations are carried out on this
He Zhenqi, Zhang Ke, Lv Meibai
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Biology Open, 2015 Echolocating bats are exposed not only to the echoes of their own calls, but often the signals of conspecifics and other bats. For species emitting short, frequency modulated signals e.g.
Kayleigh Fawcett +3 more
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Sustainability: Science, Practice, & Policy, 2021 Academia, as many other sectors, has faced wide-ranging disruptions due to COVID-19, with teaching and research activity conducted entirely online in many countries.
Tullia Jack, Andrew Glover
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Movement Ecology, 2022 Background Homeothermic marine animals in Polar Regions face an energetic bottleneck in winter. The challenges of short days and cold temperatures are exacerbated for flying seabirds with small body size and limited fat stores.
Allison Patterson +5 more
doaj +1 more source
The Motion Control of Profile Milling Flying Saw
MATEC Web of Conferences, 2015 Profile milling flying saw is one of the most advanced flying saws in the modern world, its tracking system driven by servo motor and its sawing system using profile milling method. This flying saw has many advantages, such as simple control system, less
Zhang Yuhua, Song Xinhuan
doaj +1 more source
An Implementation of Actor-Critic Algorithm on Spiking Neural Network Using Temporal Coding Method
Applied Sciences, 2022 Taking advantage of faster speed, less resource consumption and better biological interpretability of spiking neural networks, this paper developed a novel spiking neural network reinforcement learning method using actor-critic architecture and temporal ...
Junqi Lu +4 more
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In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
wiley +1 more source
Filtering performance analyizing for Relative Navigation using Single Difference Carrier-Phase GPS [PDF]
Journal of Astronomy and Space Sciences, 2008 Satellite formation flying can provide the platform for interferometric observation to acquire the precise data and ensure the flexibility for space mission.
In-Kwan Park +4 more
doaj +1 more source
IEEE Access, 2023 As drones become more prevalent, their malicious use threatens public safety. To reduce this threat, an unmanned aerial vehicle (UAV) that can chase unknown drones is required.
Donghee Lee +5 more
doaj +1 more source