Results 91 to 100 of about 847,370 (336)
Biodiversity research requires more motors in air, water and on land
Methods in Ecology and Evolution, EarlyView.Abstract Human activities have accelerated species extinctions, driving rapid biodiversity decline. Simultaneously, advancements in Artificial Intelligence (AI) and autonomous systems offer transformative potential for biodiversity research. Uncrewed vehicles—drones (aerial systems) and other robots (ground and underwater platforms)—equipped with high ...
Man Qi +8 more
wiley +1 more source
Reduction of torque pulsation in ultralight helicopter transmission
Acta PolytechnicaUsually, 1–2 seats helicopters use piston engines. One of their disadvantages is a significant torque pulsation on the engine shaft. The main reason for such fluctuations is the change in parameters during the engine’s operating cycle.
Vitaly Dudnik
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The cost of applying current helicopter external noise reduction methods while maintaining realistic vehicle performance [PDF]
Analytical methods were developed and/or adopted for calculating helicopter component noise, and these methods were incorporated into a unified total vehicle noise calculation model.
Bowes, M. A.
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Assessment of the Feasibility of an Extended Range Helicopter Operational Standard for Offshore Flights [PDF]
, 2018 The accident rate of rotorcraft has improved signi1cantly over the years but at a slow pace, and in any case the number of accidents per 2ight hours is one or two orders of magnitude higher than that of commercial aircraft, a consideration that could ...
Barakos, George +14 more
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Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响
Conservation Biology, EarlyView.Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang +11 more
wiley +1 more source
NASA helicopter transmission system technology program [PDF]
, 1983 The purpose of the NASA Helicopter Transmission System Technology Program is to improve specific mechanical components and the technology for combining these into advanced drive systems to make helicopters more viable and cost competitive for commerical ...
Zaretsky, E. V.
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Thermo-mechanical stress analysis of the turbine of helicopter engine
, 2016 In this paper the results of the numerical stress analysis of the power turbine of helicopter engine were presented. In order to solve the problem, the nonlinear finite element method was used.
L. Witek, F. Stachowicz
semanticscholar +1 more source
Results of the flight noise measurement program using a standard and modified SH-3A helicopter [PDF]
A field noise measurement program has been conducted using both a standard SH-3A helicopter and an SH-3A helicopter modified to reduce external noise levels.
Henderson, H. R. +2 more
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Drones: Emergence of a transformative technology for island rodent eradications
Conservation Science and Practice, EarlyView.Drones have emerged as a potentially powerful tool to address an ongoing need for alternative rodent eradication solutions on remote islands. This potential has now been demonstrated in a diverse set of operations across the Pacific. In the coming decades, this novel toolset also offers the possibility to step beyond existing paradigms and imagine a ...
Donal Smith +3 more
wiley +1 more source
Journal of Industrial Design and Engineering Graphics, 2012 The objective of this paper is to understand how a helicopter jet engine works, which are their main characteristics and how they can be improved.
IONESCU Cristian Andrei
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