Results 81 to 90 of about 10,801 (245)

Integrated aircraft and research vessel observational studies of aerosols and clouds in summer over the western North Pacific

Progress in Earth and Planetary Science
An integrated observational study of aerosols and clouds was carried out in summer 2022 over the western North Pacific (off the eastern coast of Hokkaido, Japan) using both an aircraft and a research vessel for the first time in this area.
Makoto Koike, Yoshimi Kawai, Kouji Adachi, Hidenori Aiki, Yugo Kanaya, Hideaki Kawai, Kazuyuki Kita, Fumiyoshi Kondo, Tsuyoshi Koshiro, Hitoshi Matsui, Takuma Miyakawa, Ayumu Miyamoto, Takafumi Miyasaka, Yuzo Miyazaki, Michihiro Mochida, Tatsuhiro Mori, Nobuhiro Moteki, Toshiyuki Murayama, Hisashi Nakamura, Sho Ohata, Eitarou Oka, Satoru Okajima, Yutaka Tobo, Shion Sekizawa, Atsushi Yoshida   +24 more
doaj   +1 more source

Aircraft Wake Vortex Measurement with Coherent Doppler Lidar

EPJ Web of Conferences, 2016
Aircraft vortices are generated by the lift-producing surfaces of the aircraft. The variability of near-surface conditions can change the drop rate and cause the cell of the wake vortex to twist and contort unpredictably.
Wu Songhua, Liu Bingyi, Liu Jintao
doaj   +1 more source

Active Metamaterials with Tunable Shear Nonreciprocity and Nonlinear Dynamics

Advanced Science, EarlyView.
Active gear‐based mechanical metamaterials enable simultaneous control of translational and torsional stiffnesses by 30–100×, break shear reciprocity under positive versus negative loads, broadly tune resonant frequencies, and offer programmable dynamic responses.
Xin Fang, Miao Yu, Dianlong Yu, Li Cheng
wiley   +1 more source

Bowtie Methodology for Risk Analysis of Visual Borescope Inspection during Aircraft Engine Maintenance

Aerospace, 2019
Background—The inspection of aircraft parts is critical, as a defective part has many potentially adverse consequences. Faulty parts can initiate a system failure on an aircraft, which can lead to aircraft mishap if not well managed and has the ...
Jonas Aust, Dirk Pons
doaj   +1 more source

Aircraft Wake Vortex Observations in Hong Kong

Leida xuebao, 2017
The Hong Kong International Airport (HKIA) is among the busiest airports in the world, with total aircraft movement exceeding 400,000 in 2016. The Hong Kong Observatory (HKO), provider of aviation meteorological services to HKIA, has recently begun making the first sets of aircraft wake vortex observations at HKIA using short-range LIDARs.
Hon Kaikwong, Chan Pakwai
openaire   +1 more source

In Situ Electrostatic Charge‐Assisted Wetting for Enhancing Interfacial Strength of Printed Electronics

Advanced Electronic Materials, EarlyView.
This study introduces an in situ electrostatic charge‐assisted wetting method to enhance the interfacial strength of aerosol jet printing. By depositing negative charges on the substrate, the technique improves ink wetting and interfacial properties, achieving up to 85.6% higher interfacial shear strength.
Ao Li, Zhenxiang Xiong, Wenao Ye, Dejin Yan, Xiaoming Chen, Chenglin Yi   +5 more
wiley   +1 more source

Leveraging Digital Advanced Manufacturing to Enable Polymer Electrolyte Fuel Cells With Ultrahigh Gravimetric Power Density

Advanced Energy Materials, EarlyView.
This study employs digital advanced manufacturing to develop lightweight, compact porous distributors as alternatives to conventional bipolar plates in PEM fuel cells. A graphene‐coated nickel foam achieves a power density of 1.52 W cm−2, while titanium‐based designs deliver lightweight solutions: an LPBF‐fabricated Gyroid lattice reaches 1.36 W cm−2 ...
Hadi Heidary, Vahid Nasrollahi, Daniel Wilmot, Jacob Bracegirdle‐Morais, Sophie C. Cox, Stefan Dimov, Moataz M. Attallah, Ahmad El‐kharouf, Sara Walker, Robert Steinberger‐Wilckens   +9 more
wiley   +1 more source

Observation uncertainty and impact of Mode‐S aircraft observations in the Met Office limited area numerical weather prediction system

Meteorological Applications
Aircraft observations derived from Mode‐Select Enhanced Surveillance (Mode‐S EHS) reports are a valuable, high temporo‐spatial resolution, source of upper‐air information that can be assimilated into numerical weather prediction models.
Taejun Song, Joanne A. Waller, David Simonin   +2 more
doaj   +1 more source

Smart Bioinspired Material‐Based Actuators: Current Challenges and Prospects

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This work gathers, in a review style, an extensive and comprehensive literature overview on the development of autonomous actuators based on synthetic materials, bringing together valuable knowledge from several studies. Furthermore, the article identifies the fundamental principles of actuation mechanisms and defines key parameters to address the size
Alejandro Palacios, Léon Chiriatti, Simon Poppinga, Thomas Speck, Vincent Le Houérou   +4 more
wiley   +1 more source

Robust Reinforcement Learning Control Framework for a Quadrotor Unmanned Aerial Vehicle Using Critic Neural Network

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quadrotor unmanned aerial vehicle control is critical to maintain flight safety and efficiency, especially when facing external disturbances and model uncertainties. This article presents a robust reinforcement learning control scheme to deal with these challenges.
Yu Cai, Yefeng Yang, Tao Huang, Boyang Li   +3 more
wiley   +1 more source