Results 21 to 30 of about 20,455 (258)

Un carrefour de voies anciennes majeures sur le plateau de la Ségourie au Fief-Sauvin (Maine-et-Loire). Le dossier aérien de ses occupations protohistoriques et antiques

open access: yesArchéopages, 2021
Before the development of fieldwork, aerial archaeology played a decisive role in the recognition of major La Tène and ancient sites and sections of routes or paths, the most important of which can sometimes be followed over very long distances.
Gilles Leroux, Elven Le Goff
doaj   +1 more source

Selous aerial survey 1981

open access: yesPachyderm, 1983
Summarizes results from the 1981 Selous aerial survey, which included about 35% of the Reserve, and compares them to the 1976 data. Elephant numbers seem to have remained relatively stable with the 1976 estimate being 82,628 +/- 17% and the 1981 one ...
Markus Borner
doaj   +1 more source

Mapping out bare-nosed wombat (Vombatus ursinus) burrows with the use of a drone

open access: yesBMC Ecology, 2019
Background Wombats are large, nocturnal herbivores that build burrows in a variety of habitats, including grassland communities, and can come into conflict with people.
Julie M. Old   +2 more
doaj   +1 more source

Recent Harp and Hooded Seal Pup Production Estimates in the Greenland Sea Suggest Ecology-Driven Declines

open access: yesNAMMCO Scientific Publications, 2022
Pup production of the Greenland Sea populations of harp (Pagophilus groenlandicus) and hooded (Cystophora cristata) seals were estimated based upon aerial surveys in March 2018.
Martin Biuw   +7 more
doaj   +1 more source

An automatic spectral stabilization based on adaptive derivative Gaussian peaking algorithm

open access: yesHe jishu
BackgroundAviation γ spectrometer, measuring at high-altitude with low background counting rate, is prone to spectral line drift caused by factors such as long stable spectral periods and significant temperature effects due to its low background counting
WU Leichao   +4 more
doaj   +1 more source

Aerial Drone Survey

open access: yesInternational Journal of Advanced Research in Science, Communication and Technology, 2022
The use of unmanned aerial vehicles (UAVs) is growing rapidly across many civil application domains including real-time monitoring, providing wireless coverage, remote sensing, search and rescue, delivery of goods, security and surveillance, precision agriculture, and civil infrastructure inspection.
null Reshma K R   +2 more
openaire   +1 more source

Study on wavelet denoising effect of transient electromagnetic method based on optimal threshold reference

open access: yesMeikuang Anquan
The field data acquisition of transient electromagnetic method is prone to jump due to various random disturbances. Wavelet denoising realizes data denoising by multi-scale decomposition, threshold setting and reconstruction of signal.
Yi DONG, Chuang YANG
doaj   +1 more source

Ground-truthed and high-resolution drone images of the leafy spurge weed plant (Euphorbia esula)

open access: yesScientific Data
This dataset comprises 1.3 cm resolution aerial images of grasslands in western Montana, USA, captured by a commercial drone. Many scenes contain leafy spurge (Euphorbia esula), introduced to North America, now widespread in rangeland ecosystems, which ...
Kyle Doherty   +7 more
doaj   +1 more source

Drivers of Bornean Orangutan Distribution across a Multiple-Use Tropical Landscape

open access: yesRemote Sensing, 2021
Logging and conversion of tropical forests in Southeast Asia have resulted in the expansion of landscapes containing a mosaic of habitats that may vary in their ability to sustain local biodiversity.
Sol Milne   +8 more
doaj   +1 more source

Financial Burden Associated With Hospitalisation Among Families of Childhood Brain Tumours in Australia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Families of children with cancer experience significant financial strain, even with universal healthcare. Indirect costs, such as productivity losses and non‐medical expenses, are rarely included in economic evaluations, and little is known about how effectively financial aid programmes alleviate this burden. Childhood brain tumours
Megumi Lim   +8 more
wiley   +1 more source

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