Results 101 to 110 of about 189,174 (279)

Micro‐habitat selection by boreal woodland caribou improves access to food

Wildlife Biology, EarlyView.
Bio‐logging sensors attached to radiotelemetry receivers have great potential to transform our understanding of the ecological, physiological, and energetic constraints that shape patterns of wildlife movement under field conditions. We used video camera collars to assess microhabitat selectivity by woodland caribou Rangifer tarandus in boreal forests ...
Ian D. Thompson, Philip A. Wiebe, Arthur R. Rodgers, Douglas Reid, James A. Baker, Brent R. Patterson, Eric McNeill, Romain Dejeante, John M. Fryxell   +8 more
wiley   +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., Hilton, D. A., Pegg, R. J.   +2 more
core   +1 more source

Parturition timing and the pre‐ and post‐partum behaviour of female moose assessed using animal‐borne video and movement‐based approaches

Wildlife Biology, EarlyView.
Limited information on moose calving behaviour, including parturition timing, cow‐calf interactions, and pre‐ and post‐partum movement patterns hinder our ability to define calving phenology and habitat use. GPS‐collars were deployed on 89 female moose over five years, including eight collars equipped with animal‐borne video and environmental data ...
Mikaela Borgeaud LeBlanc, Manuelle Landry‐Cuerrier, Vincent Brodeur, Murray M. Humphries   +3 more
wiley   +1 more source

A Lightweight Convolutional Neural Network for Real-time Detection of Aircraft Engine Blade Damage

Journal of Applied Science and Engineering
To address the large number of parameters and the computational complexity of deep learning models in the field of borescope detection, we propose a lightweight blade damage detection model LSSD using a knowledge distillation algorithm.
Wenzhe Wang, Hua Su, Xinliang Liu, Jawad Munir, Jingqiu Wang   +4 more
doaj   +1 more source

Design considerations for breeding waterfowl surveys

Wildlife Society Bulletin, EarlyView.
This study evaluated how different survey designs affect the accuracy and precision of breeding waterfowl population estimates in Iowa's Prairie Pothole Region. Using aerial survey data from 2016–2018, we found that conducting at least 2 visits per season reduced bias in pair estimates, particularly for wood ducks and blue‐winged teal, while mallard ...
Tyler M. Harms, Stephen J. Dinsmore, Orrin E. Jones III   +2 more
wiley   +1 more source

Fast Aerodynamic Prediction of Airfoil with Trailing Edge Flap Based on Multi-Task Deep Learning

Aerospace
Conventional methods for solving Navier–Stokes (NS) equations to analyze flow fields and aerodynamic forces of airfoils with trailing edge flaps (TEFs) are known for their significant time cost.
Chi Zhang, Zhiyuan Hu, Yongjie Shi, Guohua Xu   +3 more
doaj   +1 more source

Mars Science Helicopter Conceptual Design [PDF]

, 2020
Robotic planetary aerial vehicles increase the range of terrain that can be examined, compared to traditional landers and rovers, and have more near-surface capability than orbiters. Aerial mobility is a promising possibility for planetary exploration as
Balaram, Jayarao, Chan, Athena, Chi, Cheng, Datta, Anubhav, Escobar, Daniel, Fehler, Mireille E., Grip, Havard F., Johnson, Wayne R., Koning, Witold J., Kuang, Winnie, Lumba, Ravi, Malpica, Carlos, Tuano, Allysa Mae B., Tzanetos, Theodore, Withrow, Shannah N., Young, Larry A.   +15 more
core   +1 more source

Lack of capture‐induced mortality of neonates associated with variation in handling protocols

Wildlife Society Bulletin, EarlyView.
We found that handling metrics (e.g., handling time, number of collectors, and age at capture) had limited or no influence on the survival of neonatal mule deer, desert bighorn sheep, and Rocky Mountain bighorn sheep within the first few days of life. Furthermore, we found that handled mule deer and Rocky Mountain bighorn neonates were recruited at a ...
Marcus E. Blum, Tayler N. LaSharr, Kelley M. Stewart, John T. Hogg, Brittany L. Wagler, Rachel A. Smiley, Katey S. Huggler, Rhiannon P. Jakopak, Mitchell J. Brunet, Rebecca L. Levine, Rebekah T. Rafferty, Samantha P. H. Dwinnell, Benjamin M. Regan, Mike Cox, Brian F. Wakeling, Doug Brimeyer, Gary L. Fralick, Brandon Scurlock, Rusty C. Kaiser, Mark Thonhoff, Patrick W. Burke, Alyson B. Courtemanch, Daryl Lutz, Timothy J. Robinson, Kevin L. Monteith   +24 more
wiley   +1 more source

Sand Ingestion Behavior of Helicopter Engines During Hover in Ground Effect

Aerospace
Sand ingestion exerts significant effects on the performance of helicopter engines, and it is imperative to investigate this phenomenon. In this study, the mechanisms of engine sand ingestion during helicopter hover in ground effect are analyzed. Firstly,
Qiang Li, Linghua Dong, Changxin Song, Weidong Yang   +3 more
doaj   +1 more source

Results of the noise measurement program on a standard and modified OH-6A helicopter [PDF]

A field noise measurement program has been conducted on a standard OH-6A helicopter and one that had been modified by reducing the rotor speed, altering rotor tip shape, and treating the engine exhaust and inlet to reduce the external noise levels.
Henderson, H. R., Hilton, D. A., Peegg, R. J.   +2 more
core   +1 more source