Results 41 to 50 of about 189,174 (279)

Parents' WhatsApp coping resources in the context of ongoing political conflicts: An ecological exploration

American Journal of Community Psychology, EarlyView.
Abstract Mobile technologies have become significant resources for crisis communication and social support in recent years. However, despite empirical evidence pointing to the centrality of these technologies for parenthood in everyday life, it is yet unknown how parents' coping resources play a role in the digital environment.
Daphna Yeshua‐Katz, Stav Shapira, Orna Braun‐Lewensohn   +2 more
wiley   +1 more source

Uncovering Archaeological Treasures at Saruq al‐Hadid, UAE: Insights From Ground Penetrating Radar and Magnetic Data

Archaeological Prospection, EarlyView.
ABSTRACT Saruq al‐Hadid, located at the edge of the Rub Al‐Khali desert near Dubai's southern border with Abu Dhabi, is among the region's richest archaeological sites. Renowned for its historical role in metallurgy, trade and human habitation, the site was occupied from the Umm an‐Nar period through the post–Iron Age. Despite its significance, much of
Moamen Ali, Sonia Santos‐Assunção, Mohammed Y. Ali, Diana Francis, Mansour B. Radwan, Mariam A. Alsuwaidi, Bader M. Al Ali, Jamal H. Safi, Saif Ullah, Muhammed A. Iqbal   +9 more
wiley   +1 more source

Helicopter Accident Survivability [PDF]

Journal of the Royal Army Medical Corps, 1984
Army Air Corps accident and fatality rates have now reached levels which compare favourably with data from other civilian and military sources. This improvement is the result of enhanced helicopter design and parallel progress in aircrew training. The introduction of new generations of turbine powered rotor craft has largely eliminated mechanical ...
P, Vyrnwy-Jones, R, Thornton
openaire   +2 more sources

Risk‐aware safe reinforcement learning for control of stochastic linear systems

Asian Journal of Control, EarlyView.
Abstract This paper presents a risk‐aware safe reinforcement learning (RL) control design for stochastic discrete‐time linear systems. Rather than using a safety certifier to myopically intervene with the RL controller, a risk‐informed safe controller is also learned besides the RL controller, and the RL and safe controllers are combined together ...
Babak Esmaeili, Nariman Niknejad, Hamidreza Modares   +2 more
wiley   +1 more source

Research on Whirl‑Flutter Characteristics of Distributed Propulsive Rotorcraft

Nanjing Hangkong Hangtian Daxue Xuebao
Aiming at the problem of whirl-flutter dynamics of distributed propulsion rotorcraft in high-speed forward flight state， this paper proposes a highly versatile， fast and efficient distributed multi-rotor/tilt-wing coupled aeroelastic dynamics analysis ...
CHENG Yi, YU Zhihao, WANG Siwen, ZHAO Jinrui   +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

Adaptive Feedforward Vibration Control of Helicopter Cabin Floor Driven by Piezoelectric Stack Actuators: Modeling, Simulation and Experiments

International Journal of Aerospace Engineering
Active control of structural response is the most practical and effective approach to mitigate helicopter vibration and enhance ride quality. In this paper, adaptive feedforward vibration control is constructed for the helicopter cabin floor driven by ...
Laishou Song, Yingquan Wang, Xiaoyu Shen
doaj   +1 more source

Design of Swarm Intelligence Control Based on Double-Layer Deep Reinforcement Learning

Applied Sciences
Traditional methods have limitations regarding efficient collaboration and dynamic response in complex dynamic environments. Although existing swarm intelligence control methods possess certain adaptive optimization capabilities, they still face ...
Xiangpei Yan, Guorui Yu, Guoke Huang, Ruchuan Zhou, Liu Hao   +4 more
doaj   +1 more source

Evaluating the Role of Analogies in Biochemistry Education: Lessons Learned From Pre‐ and Post‐Pandemic Dental Student Perceptions

Journal of Dental Education, EarlyView.
ABSTRACT Biochemistry forms the foundation for understanding biomolecules and molecular processes crucial to dental and oral biology. However, it is often perceived as a challenging subject for dental students with diverse educational backgrounds. Analogies are a pedagogical tool that helps explain new and abstract concepts in biochemistry.
Ulysses Tsz Fung Lam, Yun Chau Long
wiley   +1 more source

Analytical and Experimental Study of Key Performance of Helicopter Rotor Torsion–Tension Straps

Actuators
As a crucial component of rotor systems, tension and torsion (TT) straps, recognized for their compact structure, have been adopted in advanced helicopters such as the SB > 1, EC145, and Mi-26.
Yamin Wang, Ruchuan Zhou, Wenjun Huang
doaj   +1 more source