Results 61 to 70 of about 74,073 (217)

Monitoring GPS‐collared moose by ground versus drone approaches: efficiency and disturbance effects

Wildlife Biology, EarlyView.
Efficient wildlife management requires precise monitoring methods, for example to estimate population density, reproductive success, and survival. Here, we compared the efficiency of drone (equipped with a RGB camera) and ground approaches to detect and observe GPS‐collared female moose Alces alces and their calves. We also quantified how drone (n = 42)
Martin Mayer, Erlend Furuhovde, Kristoffer Nordli, Giorgia Myriam Ausilio, Petter Wabakken, Ane Eriksen, Alina L. Evans, Karen Marie Mathisen, Barbara Zimmermann   +8 more
wiley   +1 more source

Development of a project to create a road transport infrastructure using small unmanned aircraft [PDF]

E3S Web of Conferences
The infrastructure for small unmanned aircraft has not yet been formed: there are no organized ground-based stations, there are no clear operating regulations for performing specialized types of work.
Duganova Elena, Novikov Ivan, Miroshnikov Evgeny, Dolzhenko Alexander   +3 more
doaj   +1 more source

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

Wildlife 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

A drone-based prototype technique for monitoring soil degassing at active volcanic craters

Earth, Planets and Space
Developing techniques to monitor volcanic activity from safe distances is crucial for advancing scientific knowledge while protecting the safety of field personnel. One of the most demanding tasks in this context is the measurement of soil gas emissions,
Társilo Girona, Jason Williams, James Copple, Matthew Westhoff, Kyriaki Drymoni, Noé García-Martínez, David Benavente, Conor A. Bacon, Maarten de Moor, Einat Lev   +9 more
doaj   +1 more source

Application of an AIS to the problem of through life health management of remotely piloted aircraft [PDF]

, 2015
The operation of RPAS includes a cognitive problem for the operators(Pilots, maintainers, ,managers, and the wider organization) to effectively maintain their situational awareness of the aircraft and predict its health state.
Fan, Ip-Shing, Jennions, Ian K., McFeat, Jim, Pelham, Jonathan G.   +3 more
core   +1 more source

Evaluating machine learning models for multi‐species wildlife detection and identification on remote sensed nadir imagery in South African savanna

Wildlife Biology, EarlyView.
This research paper investigates the efficacy of leading machine learning (ML) models for detecting and identifying ungulate species in African savanna using nadir imagery from unmanned aerial vehicles (UAVs). Traditional aerial counting methods, while widely used, suffer from significant limitations in accuracy and precision, in part due to human ...
Paul Allin, Fadel Seydou, Radloff Frans, Andrew Davies, Alison Leslie   +4 more
wiley   +1 more source

Autonomous systems thermographic NDT of composite structures [PDF]

, 2019
Transient thermography is a method used successfully in the evaluation of composite materials and aerospace structures. It has the capacity to deliver both qualitative and quantitative results about hidden defects or features in a composite structure ...
Avdelidis, N. P., Deane, S., Ibarra-Castanedo, C., Maldague, X. P. V., Tsourdos, A., Tzitzilonis, V., Williamson, A., Yazdani Nezhad, H., Zhang, H.   +8 more
core   +2 more sources

Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain

Wildlife Biology, EarlyView.
Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund, Torbjørn Ergon, Simon Filhol, Atle Mysterud   +3 more
wiley   +1 more source

Vertical Merger Enforcement Actions: 1994–April 2020 [PDF]

, 2020
We have revised our earlier listing of vertical merger enforcement actions by the Department of Justice and Federal Trade Commission since 1994. This revised listing includes 66 vertical matters beginning in 1994 through April 2020.
Culley, Daniel P., Salop, Steven C.
core   +1 more source

Cooperative monocular-based SLAM for multi-UAV systems in GPS-denied environments [PDF]

, 2018
This work presents a cooperative monocular-based SLAM approach for multi-UAV systems that can operate in GPS-denied environments. The main contribution of the work is to show that, using visual information obtained from monocular cameras mounted onboard ...
Grau Saldes, Antoni, Guerra Paradas, Edmundo, Munguía Alcalá, Rodrigo Francisco, Trujillo, Juan Carlos   +3 more
core   +3 more sources