Results 21 to 30 of about 14,828 (260)

Neural Network Adaptive Attitude Control of Full-States Quad Tiltrotor UAV

Aerospace
The control stability and accuracy of quad tiltrotor UAVs is improved when encountering external disturbances during automatic flight by an active disturbance rejection control (ADRC) parameter self-tuning control strategy based on a radial basis ...
Jiong He, Binwu Ren, Yousong Xu, Qijun Zhao, Siliang Du, Bo Wang   +5 more
doaj   +1 more source

Adolescent Reports of Demanding and Responsive Features in Helicopter and Overprotective Parenting: Divergence of Correlations With Indicators of Adjustment

Journal of Adolescence, EarlyView.
ABSTRACT Introduction Research collecting data from parents has found that helicopter parenting (HP) and overprotective parenting (OP) of their adolescents can be reformed to identify two features: demanding and responsive overparenting (Ryan et al. 2024).
Melanie J. Zimmer‐Gembeck, Katherine M. Ryan, Bart Soenens, Grégoire Zimmermann, Stijn Van Petegem   +4 more
wiley   +1 more source

Research on Pilot Control Behavior in Helicopter Target Tracking Tasks

Nanjing Hangkong Hangtian Daxue Xuebao
During helicopter operations for target tracking tasks， pilots perceive the current flight state through visual and motion cues， thereby generating corresponding control behaviors.
HE Zhixin, WANG Luofeng, CHEN Renliang
doaj   +1 more source

Abdominal POCUS Education for Clinicians: A Systematic Review of Teaching Methods for Point‐of‐Care Abdominal Ultrasonography

Journal of Clinical Ultrasound, Volume 53, Issue 3, Page 547-561, March/April 2025.
For patients to benefit from abdominal point‐of‐care ultrasound, the ultrasound examinator must be sufficiently trained. In this systematic review, we identified advantages and disadvantages of different training methods and approaches. We conclude that thoughtful integration of the various educational methods is crucial for stakeholders and educators.
Birkir Örn Sveinsson, Olof Kristin Thorsteinsdottir, Alexander G. P. Browne, Benjamin S. B. Rasmussen, Anders Bo Nielsen, Pia Iben Pietersen   +5 more
wiley   +1 more source

Habitat characteristics along spring migration routes of elk, mule deer, and pronghorn in the southern San Juan Mountains

The Journal of Wildlife Management, EarlyView.
We evaluated habitat characteristics of spring migration routes and stopover sites for adult female elk (Cervus canadensis), mule deer (Odocoileus hemionus), and pronghorn (Antilocapra americana) in the San Juan Mountains (2021–2022) and found species‐specific differences in vegetation structure, terrain, and proximity to land cover types relative to ...
Joanna R. Ennis, Nicole M. Tatman, Steven E. Sesnie, James W. Cain III   +3 more
wiley   +1 more source

Installation Effect of the Rear-Mounted Tails of a Compound Helicopter on Its Propeller Noise

Aerospace
For high-speed compound helicopters, such as the S-97 Raider, the reflection and diffraction effects of vertical/horizontal tails on pusher propeller noise are inevitable.
Tao Yang, Xi Chen, Xuan Gao, Li Ma, Xiayang Zhang, Qijun Zhao   +5 more
doaj   +1 more source

Experimental and field evidence indicate that islet‐nesting tundra birds experience reduced nest predation and benefit indirectly from high snow goose densities

Oikos, EarlyView.
Landscape features can shape the occurrence and strength of predator–prey interactions by influencing predation risk and prey distribution. In the High Arctic, some bird species select nesting sites with physical features that impede access for their main terrestrial predator, the Arctic fox.
Marylou Beaudoin, Andréanne Beardsell, Éliane Duchesne, Madeleine‐Zoé Corbeil‐Robitaille, Pierre Legagneux, Dominique Berteaux, Joël Bêty   +6 more
wiley   +1 more source

Numerical Analysis of Aerodynamic Performance of Low Tip‑Speed Rotors with Gurney Flaps

Nanjing Hangkong Hangtian Daxue Xuebao
To explore the potential for increasing lift on low tip-speed rotors， a rotor performance calculation model is established. The flight data of the UH-60A helicopter are utilized to validate this model.
WAN Haoyun, HAN Dong, WANG Tianjian
doaj   +1 more source

A simulation model for the electrical rotary-wing aircraft (eVTOL) performance estimation for the urban air mobility purposes

Научный вестник МГТУ ГА, 2023
The present paper presents a simulation model description developed for the aircraft performance estimation of the most popular electric vertical takeoff and landing aircraft (eVTOL) aerodynamic configurations with the electric (hybrid) power plant for ...
M. I. Myasnikov, I. R. Ilyin
doaj   +1 more source

Exploring consumer preferences for wild meat and other animal proteins in Gamba, Gabon: Implications for conservation and management of natural resources alongside extractive industry

People and Nature, EarlyView.
Abstract The town of Gamba in southwest Gabon represents an exceptional example of how the development of an extractive industry (in this case oil production) may impact wild meat consumption in an area of global importance for biodiversity. Studies in the 1990s identified an active wild meat trade; however, no studies have been undertaken since, and ...
James McNamara, Landry Tchignoumba, Gabriel Koumba, Ghislain Guissouegou, Anna Feistner   +4 more
wiley   +1 more source