Results 141 to 150 of about 189,925 (269)
A computer program for the determination of the acoustic pressure signature of helicopter rotors due to blade thickness [PDF]
A computer program is presented for the determination of the thickness noise of helicopter rotors. The results were obtained in the form of an acoutic pressure time history.
Farassat, F., Mall, G. H.
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Evolution of Neural Networks for Helicopter Control: Why Modularity Matters [PDF]
, 2006 The problem of the automatic development of controllers for vehicles for which the exact characteristics are not known is considered in the context of miniature helicopter flocking.
De Nardi, Renzo +3 more
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The Challenges of Backsourcing
Financial Accountability &Management, EarlyView.ABSTRACT Public sector outsourcing sometimes ends in unexpected termination, forcing authorities to engage in backsourcing. The aim of this study is to identify the challenges posed by unexpected terminations of sourcing contracts in the public sector and analyze how actual practices in these situations diverge from theoretical expectations in the ...
Johan Berlin +3 more
wiley +1 more source
Helicopter simulation: Making it work [PDF]
The opportunities for improved training and checking by using helicopter simulators are greater than they are for airplane pilot training. Simulators permit the safe creation of training environments that are conducive to the development of pilot ...
Payne, Barry
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Static and dynamic helicopter airframe analysis with NASTRAN [PDF]
, 1973 The use of NASTRAN at Bell Helicopter Company for structural static and dynamic analysis of a helicopter airframe is described. Analysis of airframe internal loads, main rotor isolation systems, and airframe vibration is discussed.
Cronkhite, J. D., Wilson, H. E.
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Choice Feminism and the Opt‐Out Phenomenon: Is It Possible to Speak of Free Will?
Gender, Work &Organization, EarlyView.ABSTRACT The aim of this research was to question choice feminism in the light of the opt‐out phenomenon, through a thematic narrative analysis of the professional trajectories of five Brazilian women with university degrees. As a result of the research—and the main contribution to the advancement of knowledge in the field—it was found that although ...
Paula Furtado Hartmann de Queiroz Monteiro +3 more
wiley +1 more source
Psychoacoustic Test to Determine Sound Quality Metric Indicators of Rotorcraft Noise Annoyance [PDF]
Noise certification metrics such as Effective Perceived Noise Level and Sound Exposure Level are used to ensure that helicopters meet regulations, but these metrics may not be good indicators of annoyance since noise complaints against helicopters ...
Christian, Andrew +2 more
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Helicopter anti-torque system using fuselage strakes [PDF]
, 1987 The improvement of the helicopter torque control system is discussed. At low to medium forward speeds helicopter performance is limited by the effectiveness of the means for counteracting main rotor torque and controlling sideslip airloads.
Kelley, Henry L., Wilson, John C.
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Alloparenting the investment child: A reply to responses
The British Journal of Sociology, EarlyView.
Nina Bandelj
wiley +1 more source