Results 51 to 60 of about 16,312 (221)

Working‐Class Muscles? Co‐Operative Gyms in Interwar Britain

open access: yesHistory, EarlyView.
Abstract The Health & Strength League's network of co‐operative gymnasiums constituted one of interwar Britain's most significant yet overlooked physical culture institutions, affiliating over 800 gyms across Britain and Ireland by 1939. Drawing on Health & Strength magazine's editorial content and reader contributions, this article argues that these ...
CONOR HEFFERNAN
wiley   +1 more source

Modification of three-dimensional transition in the wake of a rotationally oscillating cylinder [PDF]

open access: yes, 2010
A study of the flow past an oscillatory rotating cylinder has been conducted, where the frequency of oscillation has been matched to the natural frequency of the vortex street generated in the wake of a stationary cylinder, at Reynolds number 300.
Canuto   +4 more
core   +5 more sources

Optical vortex streets

open access: yes, 2002
Peer ...
Molina Terriza, Gabriel   +2 more
openaire   +3 more sources

Description, Articulation and Limitations in the Social Theory of Insurance

open access: yesThe British Journal of Sociology, EarlyView.
ABSTRACT There have been surprisingly few sustained efforts to explain or theorise the role insurance plays in society. Even the most theoretically inflected insurance scholarship, emanating from governmentality and Actor Network Theory scholarship, tends to be grounded in empirical cases, set in particular periods and places, and it is often ...
Liz McFall
wiley   +1 more source

A unified phase-matching mechanism for bio-inspired propulsion and vortex-induced energy harvesting in Kármán streets

open access: yesEngineering Applications of Computational Fluid Mechanics
Fish swimming in unsteady environments can exploit the Kármán vortex streets generated by upstream obstacles to reduce energetic cost or enhance propulsion, offering inspiration for bio-inspired marine energy harvesting. Using a two-dimensional numerical
Kai Ren   +5 more
doaj   +1 more source

The N-Vortex Problem on a Symmetric Ellipsoid: A Perturbation Approach

open access: yes, 2007
We consider the N-vortex problem on a ellipsoid of revolution. Applying standard techniques of classical perturbation theory we construct a sequence of conformal transformations from the ellipsoid into the complex plane.
Bogolmonov V. A.   +5 more
core   +1 more source

Decentralized propaganda in the era of digital media: The massive presence of the Chinese state on Douyin

open access: yesAmerican Journal of Political Science, EarlyView.
Abstract The rise of social media in the digital era poses unprecedented challenges to authoritarian regimes that aim to influence public attitudes and behaviors. To address these challenges, we argue that authoritarian regimes have adopted a decentralized approach to produce and disseminate propaganda on social media.
Yingdan Lu   +3 more
wiley   +1 more source

Analysis of flow and energy dissipation in pump turbine with small guide vane opening

open access: yesEngineering Applications of Computational Fluid Mechanics
In this study, a detailed flow state analysis of a reversible pump turbine (RPT) under small guide vane opening conditions was conducted using both numerical simulation and experimental methods on three analysis planes at 0.5 span. The entropy production
Jiahao Lu   +6 more
doaj   +1 more source

Numerical simulation of confined flows past obstacles – the comparative study of Lattice Boltzmann and Spectral Element Methods

open access: yesArchives of Mechanics, 2012
This paper concerns the Lattice Boltzmann Method (LBM) which has recently become alternative, computationally efficient tool to simulate a Newtonian fluid flow, especially in complex geometries.
W. Regulski, J. Szumbarski
doaj   +1 more source

Hollow vortices and minimal surfaces [PDF]

open access: yes, 2014
We consider an overdetermined elliptic problem known as the hollow vortex problem. We prove that the solutions to this problem are in 1:1 correspondence with minimal graphs bounded by horizontal symmetry lines.
Martin Traizet, Van Dyke M.
core   +4 more sources

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