Results 11 to 20 of about 20,455 (258)

The State of Aerial Surveillance: A Survey

open access: yesCoRR, 2022
The rapid emergence of airborne platforms and imaging sensors are enabling new forms of aerial surveillance due to their unprecedented advantages in scale, mobility, deployment and covert observation capabilities. This paper provides a comprehensive overview of human-centric aerial surveillance tasks from a computer vision and pattern recognition ...
Kien Nguyen Thanh   +6 more
openaire   +2 more sources

Prediction of Deep Formation Temperature and Its Implications for Resource Development: A Case Study from the Bide-Santang Basin, Guizhou [PDF]

open access: yesE3S Web of Conferences
Based on 135 boreholes temperature measurement data and the thermal physical parameters tests of coal and rock samples, this dissertation analyzed the modern geothermal gradient, the terrestrial heat flow and the stratum temperature distribution ...
Lu Lingling
doaj   +1 more source

Optimizing surveys of fall‐staging geese using aerial imagery and automated counting

open access: yesWildlife Society Bulletin, 2023
Ocular aerial surveys allow efficient coverage of large areas and can be used to monitor abundance and distribution of wild populations. However, uncertainty around resulting population estimates can be large due to difficulty in visually identifying and
Emily L. Weiser   +6 more
doaj   +1 more source

Marine mammal biodiversity and rare narwhal (Monodon monoceros) observations near northern Ellesmere Island, Canada

open access: yesEcosphere, 2021
A climate‐driven decline of sea ice has increased international interest in understanding the ecology of seldom studied high‐Arctic regions projected to retain the last remnants of summer sea ice.
Cody G. Carlyle   +5 more
doaj   +1 more source

Savannas of southern Africa: attributes and use of some types along the Tropic of Capricorn

open access: yesBothalia: African Biodiversity & Conservation, 1983
Two recent reconnaissance vegetation surveys of savanna in the Kalahari of Botswana and in the western Transvaal (RSA) carried out on a landscape basis are described. Attributes and utilization of four selected stations along a transect of about 1 000 km
F. van der Meulen, H. A. M. J. van Gils
doaj   +1 more source

Improving accuracy of automated 3-D building models for smart cities

open access: yesInternational Journal of Digital Earth, 2019
Photorealistic three-dimensional (3-D) models are important tools for urban and disaster management planning because they contain useful visual and spatial information for assessing the situation and responding accordingly.
Byungyun Yang, Jungil Lee
doaj   +1 more source

Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019

open access: yesArctic Science, 2022
Successful reproduction is essential to a species existence. Here we summarize Bering–Chukchi–Beaufort (BCB) bowhead whale (Balaena mysticetus Linnaeus, 1758) calf distribution, ratio of calf to adult sightings, and encounter rate from data collected ...
J.T. Clarke   +4 more
doaj   +1 more source

REPORT ON THE MAP OF WEST ONGUL ISLAND

open access: yesAntarctic Record, 1965
0ne sheet map of West Ongul Island, separated by a narrow strait from East Ongul Island in which Syowa Station is situated, was compiled with 1 : 5,000 scale.
Arao YOSHIDA, Yoshio SAITO
doaj   +1 more source

Urban Forest Growth and Gap Dynamics Detected by Yearly Repeated Airborne Light Detection and Ranging (LiDAR): A Case Study of Cheonan, South Korea

open access: yesRemote Sensing, 2019
Understanding forest dynamics is important for assessing the health of urban forests, which experience various disturbances, both natural (e.g., treefall events) and artificial (e.g., making space for agricultural fields).
Heejoon Choi   +2 more
doaj   +1 more source

Survey of Simulators for Aerial Robots.

open access: yesCoRR, 2023
Uncrewed Aerial Vehicle (UAV) research faces challenges with safety, scalability, costs, and ecological impact when conducting hardware testing. High-fidelity simulators offer a vital solution by replicating real-world conditions to enable the development and evaluation of novel perception and control algorithms.
Cora A. Dimmig   +6 more
openaire   +2 more sources

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