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Using the Stallings Observation System to Investigate Time on Task in Four Countries
(World Bank, 2014)
This paper presents the history of the Stallings Observation System (SOS) and describes the adaptation of the SOS instrument, training for its use in international settings, and results from four countries of the World ...
Using the Stallings Observation System to Investigate Time on Task in Four Countries
(World Bank, 2014)
This paper presents the history of the Stallings Observation System (SOS) and describes the adaptation of the SOS instrument, training for its use in international settings, and results from four countries of the World ...
Impacts of stall and structural nonlinearities on the stability of aeroelastic systems
(2021-01-01)
The effects of stall, quadratic, and cubic nonlinearities in the pitch degree of freedom on the behavior of a two-degree of freedom aeroelastic system are investigated. The nonlinear governing equations of the considered ...
Experimental investigation of an airfoil response under stall-induced pitching oscillations
(2016-01-01)
In this work, an investigation on the embedded dynamics of experimental aeroelastic signals of an airfoil under the influence of stall-induced oscillations is presented. Helicopter blades or wind turbines are examples of ...
Experimental investigation of an airfoil response under stall-induced pitching oscillations
(2016-01-01)
In this work, an investigation on the embedded dynamics of experimental aeroelastic signals of an airfoil under the influence of stall-induced oscillations is presented. Helicopter blades or wind turbines are examples of ...
Ten years later: Evaluation of the effectiveness of 12.5% amitraz against a field population of Rhipicephalus (Boophilus) microplus using field studies, artificial infestation (Stall tests) and adult immersion tests
(2015-12-15)
Using field trials, artificial infestations (Stall tests) and in vitro adult immersion tests, the present study evaluated the acaricidal efficacy of 12.5% amitraz administered via whole body spraying against a Rhipicephalus ...
Investigations on the interactions between structural and aerodynamic nonlinearities and unsteadiness for aeroelastic systems
(2022-01-01)
A nonlinear analysis is performed on a two-degree-of-freedom wing-based system. Structural nonlinearities are introduced in the pitch degree of freedom when considering two different forms of the aerodynamic loads. Comparisons ...
Wake instability issues: From circular cylinders to stalled airfoils
(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2011)
Some recent results regarding the global dynamical behaviour of the wake of circular cylinders and airfoils with massive separation are reviewed in this paper. In order to investigate the effect of interference, the ...
Comparative fatigue life assessment of wind turbine blades operating with different regulation schemes
(2019)
A comparative evaluation of the fatigue damage occurring in the blades of small wind turbines, with different power regulation schemes, has been conducted for the first time. Three representative test cases were built, one ...