Results 11 to 20 of about 46,005 (212)
Energetic and physical limitations on the breaching performance of large whales
eLife, 2020 The considerable power needed for large whales to leap out of the water may represent the single most expensive burst maneuver found in nature. However, the mechanics and energetic costs associated with the breaching behaviors of large whales remain ...
Paolo S Segre +17 more
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Baleka: A Bipedal Robot for Studying Rapid Maneuverability
Frontiers in Mechanical Engineering, 2020 In nature animals are highly adapted to perform rapid maneuvers. However, these maneuvers have generally been avoided by robotics researchers due to the complex (and poorly-understood) dynamics they entail.
Callen Fisher +2 more
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Avian cerebellar floccular fossa size is not a proxy for flying ability in birds [PDF]
, 2013 Extinct animal behavior has often been inferred from qualitative assessments of relative brain region size in fossil endocranial casts. For instance, flight capability in pterosaurs and early birds has been inferred from the relative size of the ...
Abel, Richard L. +8 more
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Experimental studies on seakeeping and maneuverability of ships in adverse weather conditions [PDF]
, 2017 The introduction of the energy efficiency design index (EEDI), which is applicable for various types of new-built ships after January 1,2013, raised concerns regarding the sufficiency of propulsion power and steering devices to maintain maneuverability ...
Cura-Hochbaum, Andrés +6 more
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Stability versus maneuverability in hovering flight [PDF]
Physics of Fluids, 2015 Insects and birds are often faced by opposing requirements for agile and stable flight. Here, we explore the interplay between aerodynamic effort, maneuverability, and stability in a model system that consists of a Λ-shaped flyer hovering in a vertically oscillating airflow.
Yangyang Huang +2 more
openaire +2 more sources
Of hummingbirds and helicopters: Hovering costs, competitive ability, and foraging strategies [PDF]
, 2004 Wing morphology and flight kinematics profoundly influence foraging costs and the overall behavioral ecology of hummingbirds. By analogy with helicopters, previous energetic studies have applied the momentum theory of aircraft propellers to estimate ...
Altshuler, Douglas L. +2 more
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Design of space turning motion control system of X-rudder submarine
Zhongguo Jianchuan Yanjiu, 2020 [Objectives] In order to solve the problem of space turning motion control for the X-rudder submarine,a fuzzy control system for turning of the X-rudder submarine is designed by using the fuzzy control method.[Methods] A weight fuzzy system for the X ...
XIA Ji, HUANG Bin
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The Effect of Hull Form Parameters on the Hydrodynamic Performance of a Bulk Carrier
Journal of Marine Science and Engineering, 2021 In this study, the effect of joint optimization of the principal dimensions and hull form on the hydrodynamic performance of a bulk carrier was studied.
Rui Deng +4 more
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Maneuvering Performance in the Colonial Siphonophore, Nanomia bijuga
Biomimetics, 2019 The colonial cnidarian, Nanomia bijuga, is highly proficient at moving in three-dimensional space through forward swimming, reverse swimming and turning.
Kelly R. Sutherland +3 more
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Journal of Marine Science and Engineering, 2021 Inspired by carangiform fish with a high-aspect ratio of the caudal fin’s up-down swing, but also by dolphins with a similar caudal fin’s left-right swing, a robotic fish with a spatial oscillating rigid caudal fin is implemented to optimize propulsion ...
Shuyan Wang, Yu Han, Shiteng Mao
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