Results 31 to 40 of about 69,343 (215)

CHANCE: A FRENCH-GERMAN HELICOPTER CFD-PROJECT [PDF]

, 2006
The paper gives an overview of the CHANCE research project (partly supported by the French DPAC and DGA and the German BMWA) which was started in 1998 between the German and French Aerospace Research Centres DLR and ONERA, the University of Stuttgart and
Pahlke, Klausdieter, Costes, Michel, Castellin, Christophe, Altmikus, Andree, D'Alascio, Alessandro   +4 more
core  

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

Eulerian simulation of the fluid dynamics of helicopter brownout [PDF]

, 2009
A computational model is presented that can be used to simulate the development of the dust cloud that can be entrained into the air when a helicopter is operated close to the ground in desert or dusty conditions.
Brown, R.E., Phillips, C.
core   +2 more sources

Parametric influence numerical simulation study on blade serrations for noise reduction

Hangkong gongcheng jinzhan
At present, the rotors of multi-rotor drones have serious noise problems. This study investigates the influence and noise reduction mechanism of trailing-edge serrations on rotor aerodynamic noise based on bionics principles.
XIE Xinglong, ZHU Qinghua, QIAO Moheng, JIANG Junjie   +3 more
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

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

Validating antler‐ and movement‐based estimates of caribou reproduction using video camera collars Validation des estimations de la reproduction du caribou basées sur la rétention des bois et  sur le déplacement à l'aide de colliers‐caméras

The Journal of Wildlife Management, EarlyView.
We used GPS video camera collar data from barren‐ground caribou in the Porcupine and Western Arctic herds to validate antler‐ and movement‐based methods for estimating annual reproductive metrics. Antler retention was highly accurate for estimating parturition, but the movement methods we tested performed marginally for estimating parturition and ...
Heather E. Johnson, Emily C. Racenet, Gabrielle L. Coulombe, Matthew D. Cameron, Kyle Joly, Martin Kienzler, Michael J. Suitor   +6 more
wiley   +1 more source

An Efficient Method for Rotor Aeroacoustic Calculation Accounting for Rotor Downwash Influence

Aerospace
Based on the Ffowcs Williams–Hawkings equations and the computational fluid dynamics method, the rotor’s aeroacoustic characteristics, considering the influence of the downwash flowfield on the sound propagation process, are calculated and analyzed ...
Bo Wang, Xuan Gao, Wei Bian, Xi Chen, Qijun Zhao   +4 more
doaj   +1 more source

The Swedish Arctic Fox Project: 40 years of research in ecology and conservation

The Journal of Wildlife Management, EarlyView.
The 4 central research themes in The Swedish Arctic Fox Project and key deliverables for practical conservation achieved over 4 decades. Abstract The scientific community widely recognizes the value of long‐term studies, especially those with individual‐level resolution; however, maintaining a consecutive data series is associated with multiple ...
Anders Angerbjörn, Julie Bommerlund, Christopher A. Cockerill, Love Dalén, Bodil Elmhagen, Rasmus Erlandsson, Malin Hasselgren, Peter Hellström, Malin Larm, Karin Norén, Magnus Tannerfeldt, Johan Wallén   +11 more
wiley   +1 more source

Characteristics of Shock Wave/Boundary Layer Interactions on Rotor Airfoils

Nanjing Hangkong Hangtian Daxue Xuebao
Utilizing the Reynolds‑averaged Navier‑Stokes （RANS） method in conjunction with a locally variable γ‑Rẽθt transition model， an in‑depth investigation is conducted on the characteristics of shock wave/boundary layer interaction （SWBLI） for the rotor ...
YANG Liuqing, ZHAO Guoqing, WANG Qing, JING Simeng, MA Li, ZHAO Qijun   +5 more
doaj   +1 more source