Results 131 to 140 of about 847,370 (336)

Reducing bias in shorebird nest survival rates across a large Arctic landscape

Ibis, Volume 168, Issue 1, Page 25-41, January 2026.
Reproductive success is a key demographic parameter that can have profound impacts on a species' population trend. Indeed, poor reproductive success has been suggested as a contributing factor to the declines observed in many species of birds, including Arctic‐breeding shorebirds.
Sarah T. Saalfeld, Emily L. Weiser, Stephen C. Brown, Christopher J. Latty, Shiloh Schulte, Richard B. Lanctot   +5 more
wiley   +1 more source

Calculation Method of Transmission System Time Between Overhaul with Considering Running Time

Jixie chuandong, 2019
By establishing the mathematical model of helicopter transmission system running time and flight time, engine working time, the time ratio relation between running time and flight time is deduced, that is, conversion coefficient.
Wenbin Pan, Weizhen Liu, Huaipeng Li
doaj  

Helicopter anti-torque system using fuselage strakes [PDF]

, 1987
The improvement of the helicopter torque control system is discussed. At low to medium forward speeds helicopter performance is limited by the effectiveness of the means for counteracting main rotor torque and controlling sideslip airloads.
Kelley, Henry L., Wilson, John C.
core   +1 more source

Horizontal Anisotropy of Turbulent Fluctuations in Surface and Air Temperatures Over a Flat, Homogeneous Surface

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 24, 28 December 2025.
Abstract Longitudinal Lx $\left({L}_{x}\right)$ and lateral Ly $\left({L}_{y}\right)$ integral length scales describe the characteristic horizontal structure of energy‐containing turbulent structures in a flow. The ratio Lx/Ly ${L}_{x}/{L}_{y}$ describes the anisotropy of the structures where Lx/Ly>1 ${L}_{x}/{L}_{y} > 1$ indicates structures elongated
Rainer Hilland, Andreas Christen
wiley   +1 more source

Tracking habitat use of migratory birds in a human‐dominated stopover site using deep learning and acoustic indices

Ecosphere, Volume 16, Issue 12, December 2025.
Abstract Bird migration is a fascinating behavioral phenomenon on earth, with annual movements along migratory routes forming complex migration networks. Stopovers, which serve as fuel stations for migratory birds, are critical to the success of long‐distance migrations.
Yuxuan Duan, Shizheng Wang, Ranxing Cao, Jiawei Feng, Jianping Ge, Tianming Wang   +5 more
wiley   +1 more source

Rescue epilepsy medication and training: A comparison between midazolam use, guidelines, clinical practice, and possibilities in the UK and Norway

Epilepsia Open, Volume 10, Issue 6, Page 1824-1834, December 2025.
Abstract Objectives Status epilepticus (SE) is a prolonged epileptic seizure carrying significant risk of long‐term disability and death. Rescue therapies are prescribed for prehospital administration to terminate SE. This study compared prescribing practices of rescue therapies of midazolam in the UK and Norway.
Audrey McBride, Oliver Johannes Henning, Cecilie Johannessen Landmark, Lance Watkins, Samuel Tromans, Paul Basset, Paraskevi Triantafyllopoulou, Rohit Shankar   +7 more
wiley   +1 more source

An exploratory investigation of the flight dynamics effects of rotor rpm variations and rotor state feedback in hover [PDF]

This paper presents the results of an analytical study conducted to investigate airframe/engine interface dynamics, and the influence of rotor speed variations on the flight dynamics of the helicopter in hover, and to explore the potential benefits of ...
Chen, Robert T. N.
core   +1 more source

Wings or Handcuffs? The Dilemmas of Helicopter Parenting Based on a Systematic Literature Review

Social Sciences
Modern parenting styles cover a wide spectrum, from strict tiger parenting to supportive lighthouse parenting. Among these, helicopter parenting remains particularly controversial: while some consider it a protective approach, others believe that ...
Zsófia Kocsis, Dorka Kas, Gabriella Pusztai   +2 more
doaj   +1 more source

Rotorcraft aviation icing research requirements: Research review and recommendations [PDF]

The status of rotorcraft icing evaluation techniques and ice protection technology was assessed. Recommendations are made for near and long term icing programs that describe the needs of industry.
Bevan, A., Dadone, L., Peterson, A. A.
core   +1 more source

Love Affair With Thin Air: Mortality, Mastery, and the Consumerism of Mountaineering

Psychology &Marketing, Volume 42, Issue 12, Page 3251-3265, December 2025.
ABSTRACT Mountaineering is arguably one of the most dangerous recreational challenges an individual may ever choose to undertake, yet millions of people annually venture above 8000 feet to challenge themselves in pursuit of personal goals, ideals, and support of individual values.
Kenneth Bates, Justine Rapp Farrell, Steven W. Kopp, Christopher Newman   +3 more
wiley   +1 more source