Results 1 to 10 of about 316,147 (211)
Journal of Experimental Biology, 2006 In this JEB Classics paper, Sir James Gray and G. J. Hancock explained how spermatozoa are propelled by flagellar bending waves (Gray and Hancock, 1955). This paper was a lasting success because it provided an easy-to-understand solution to a complicated
Brokaw, Charles J.
core +7 more sources
Efficiency of Fish Propulsion [PDF]
Bioinspiration & Biomimetics, 2014 It is shown that the system efficiency of a self-propelled flexible body is ill-defined unless one considers the concept of quasi-propulsive efficiency, defined as the ratio of the power needed to tow a body in rigid-straight condition over the power it needs for self-propulsion, both measured for the same speed. Through examples we show that the quasi-
Maertens, Audrey +2 more
arxiv +8 more sources
Identifying Effective Drivers in the Future of Sports Businesses in Khorasan Razavi Province [PDF]
Journal of New Studies in Sport Management, 2022 The purpose of this study was to identify effective drivers in the future of sports businesses in Khorasan Razavi province. The participants included experts in management, marketing and sports businesses. The interviews were conducted by snowball method
Mohammad Ali Sahebkaran +2 more
doaj +1 more source
Analysis of Effective Drivers in Pattern Framework of Spatial-Policy Making [PDF]
جغرافیا و آمایش شهری منطقهای, 2021 Architectural rupture and instability is a pattern of land management with disabilities and theoretical and operational shortcomings that the foundation of this kind of integrated and coordinating approach is always shaken with intensity and weakness ...
Hedayat Darvishi +3 more
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Rheological similarities between dense self-propelled and sheared particulate systems [PDF]
Soft Matter 16, 3642 (2020), 2021 Different from previous modelings of self-propelled particles, we develop a method to propel the particles with a constant average velocity instead of a constant force. This constant propulsion velocity (CPV) approach is validated by its agreement with the conventional constant propulsion force (CPF) approach in the flowing regime.
arxiv +1 more source
Estimate of Strouhal and Reynolds numbers for swimming penguins
Journal of Avian Biology, 2022 Propulsion performance of swimming and flying animals is often evaluated by using dimensionless numbers, such as the Strouhal and Reynolds numbers. They have been shown to allow a better understanding of locomotion efficiency, using relatively simple ...
M. H. Masud, M. La Mantia, P. Dabnichki
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Present and future of aircraft carriers as a floating diplomatic and military means of deterrence [PDF]
INCAS Bulletin, 2011 The aircraft carrier is the most capable offshore military warship the mankind has ever build and is considered as a symbol of the absolute navy and national strenght. Construction of an aircraft carrier is having a great impact on country`s industry and
Miroslav KELEMEN +3 more
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Energies, 2020 Gas turbine engines are required to operate at both design and off-design conditions that can lead to strongly unsteady flow-fields and aerodynamic losses severely impacting performance.
Nishan Jain +6 more
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Principle, Fabrication and Emerging Applications of Nanobottle Motor
Energies, 2022 Micro/nano-motors play an important role in energy, environment, and biomedicines. As a new type of nano-motors, nanobottles attract great attention due to their distinct advantages of a large cavity, high specific surface area, bionic streamline ...
Qingyuan Liu +4 more
doaj +1 more source
Mini/Micro/Nano Scale Liquid Metal Motors
Micromachines, 2021 Swimming motors navigating in complex fluidic environments have received tremendous attention over the last decade. In particular, liquid metal (LM) as a new emerging material has shown considerable potential in furthering the development of swimming ...
Li Liu, Dawei Wang, Wei Rao
doaj +1 more source