Results 21 to 30 of about 22,474 (244)
Hovering in the heat: effects of environmental temperature on heat regulation in foraging hummingbirds [PDF]
Royal Society Open Science, 2017 At high temperature (greater than 40°C) endotherms experience reduced passive heat dissipation (radiation, conduction and convection) and increased reliance on evaporative heat loss.
Donald R. Powers +5 more
doaj +1 more source
Design and Experiment of a Plateau Data-Gathering AUV
Journal of Marine Science and Engineering, 2019 The design, control, and implementation of an autonomous underwater vehicle (AUV) for collecting hydrological information from plateau rivers and lakes are presented in this paper.
Hao Xu +5 more
doaj +1 more source
Quantifying the dynamic wing morphing of hovering hummingbird [PDF]
Royal Society Open Science, 2017 Animal wings are lightweight and flexible; hence, during flapping flight their shapes change. It has been known that such dynamic wing morphing reduces aerodynamic cost in insects, but the consequences in vertebrate flyers, particularly birds, are not ...
Masateru Maeda +4 more
doaj +1 more source
Hovering hummingbird wing aerodynamics during the annual cycle. I. Complete wing [PDF]
Royal Society Open Science, 2017 The diverse hummingbird family (Trochilidae) has unique adaptations for nectarivory, among which is the ability to sustain hover-feeding. As hummingbirds mainly feed while hovering, it is crucial to maintain this ability throughout the annual cycle ...
Yonathan Achache +2 more
doaj +1 more source
, 2021 Expeirment with hovering, using mazes originally from experiment
Jonathan D. Cohen +5 more
core +1 more source
Structural Analysis of a Dragonfly Wing [PDF]
, 2010 Dragonfly wings are highly corrugated, which increases the stiffness and strength of the wing significantly, and results in a lightweight structure with good aerodynamic performance.
Jongerius, S.R. +3 more
core +1 more source
Genetic programming for generalised helicopter hovering control
, 2012 We show how genetic programming can be applied to helicopter hovering control, a nonlinear high dimensional control problem which previously has been included in the literature in the set of benchmarks for the derivation of new intelligent controllers ...
Effraimidis, D., Dracopoulos, D.
core +1 more source
Quadrotor UAV flight control via a novel saturation integral backstepping controller
Automatika, 2019 In this paper, in order to reduce the influence on quadrotor flight from different external disturbances, a novel nonlinear robust controller is designed and used in the quadrotor system. At first, a nonlinear dynamic model of the quadrotor is formulated
Laihong Zhou +3 more
doaj +1 more source
Flight behaviour of the Red-backed Hawk (Buteo polyosoma) during summer in Nevados de Chillán, Chile
El Hornero, 2011 We describe the flight behaviour of the Red-backed Hawk (Buteo polyosoma) during summer in Nevados de Chillán, Chile. Flight types most often used were gliding, wind-hovering and soaring (36.7%, 29.4% and 27.8% of the flying time, respectively).
Varia A. Dellacasa M. +3 more
doaj +1 more source