Results 131 to 140 of about 13,824 (304)

Monitoring active osprey nests with drones is more time efficient and less disturbing than conventional methods

open access: yesWildlife Biology, EarlyView.
Drones are used to monitor bird nesting sites at less accessible locations, such as on cliffs, human infrastructure, or within the tree canopy. While there are a growing number of studies documenting avian behavioral responses to various drones, there is a continued need to monitor taxa‐specific responses to different drone models. We explored both the
Natasha K. Murphy   +4 more
wiley   +1 more source

Study of optimisation strategies for aircraft structural design [PDF]

open access: yes, 2012
Optimisation plays an important role in structural design. Structural design optimisation is not only a matter of weight reduction of the structure; it can be used to optimise any type of objectives.
Huang, Feng
core  

A high‐altitude thermal infrared method for estimating moose abundance and demography in Rocky Mountain National Park, USA

open access: yesWildlife Biology, EarlyView.
Resource managers require accurate estimates of large herbivore abundance and demography to maintain ecological integrity. Common methods to count these species, including observations from low altitude helicopter flights, may conflict with other protected area management objectives and struggle to produce precise estimates for more cryptic species. To
Hanem G. Abouelezz, N. Thompson Hobbs
wiley   +1 more source

Development of Electric Propulsion Technology in Aviation [PDF]

open access: yes中国工程科学
The electric propulsion of aircraft has triggered a new wave of innovation and reform in the aviation sector. It is considered as an important move to implementing green development in aviation and addressing global environmental challenges.
Lingyun Shao   +5 more
doaj   +1 more source

Multi-objective design optimization for high-lift aircraft configurations supported by surrogate modeling [PDF]

open access: yes, 2013
Nowadays, the competition among airlines seriously depend upon the saving operating costs, with the premise that not to degrade its services quality.
Li, Daxin
core  

Impact of perturbations to nitrogen oxide emissions from global aviation. [PDF]

open access: yes, 2008
The atmospheric response to perturbations in NO x emissions from global air traffic is investigated by performing a coherent set of sensitivity experiments.
Dessens, O   +20 more
core   +1 more source

Experimental assessment of large mammal population estimates from airborne thermal videography

open access: yesWildlife Biology, EarlyView.
Wildlife resource management requires reliable, fast, and affordable methods of surveying wildlife populations to develop and adaptively adjust policies. Thermal video from drones can yield high rates of detection over large areas with relative speed and safety.
Julia S. McElhinny   +7 more
wiley   +1 more source

Multidisciplinary Aircraft and Trajectory Optimization for Novel Regional Aircraft Architectures

open access: yes
[EN] Novel aircraft configurations, such as hybrid-electric and hydrogen-powered designs, offer strong potential to reduce dependence on conventional fuels and contribute to the decarbonization of aviation. However, their efficient design remains challenging, as conventional methods often fail to capture the complex trade-offs between performance ...
openaire   +2 more sources

An optimal battery sizing algorithm for future aircraft systems studies [PDF]

open access: yes, 2022
International audienceThe path to climate-friendly aviation is a difficult way that needs to be traveled fast. A considerable and immediate drop of fossil fuels consumption is necessary to respect the Paris Agreement.
Berseneff, Boris   +3 more
core  

Spatiotemporal mapping the usable space of free‐roaming equids across the western United States

open access: yesWildlife Society Bulletin, EarlyView.
Identification of the inter‐decadal (2010‐2011) enhancement‐degradation gradients in the usable space for wild equid Herd Management Areas in the Great Basin, USA. Abstract Management of feral equids in the American West is hindered by the lack of a formal habitat map and monitoring system.
Alexander Hernandez   +3 more
wiley   +1 more source

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