Results 31 to 40 of about 882 (196)

Comparison of Fixed-Wing Unmanned Aircraft Systems (UAS) for Agriculture Monitoring

International Journal of Aviation, Aeronautics, and Aerospace, 2019
Florida citrus growers need inexpensive methods to observe citrus plants to detect disease and stress consistently. Health vegetation indices, such as the Normalized Difference Vegetation Index (NDVI) collected from Unmanned Aircraft Systems (UAS), can ...
Joseph Cerreta, Kristine M Kiernan
doaj   +1 more source

First estimates of volume distribution of HF-pump enhanced emissions at 6300 and 5577 Å: a comparison between observations and theory [PDF]

Annales Geophysicae, 2008
We present bi-static observations of radio-wave induced optical emissions at 6300 and 5577 Å from a night-time radio-induced optical emission ionospheric pumping experiment at the HIPAS (Fairbanks) facility in Alaska.
B. Gustavsson, M. Kosch, A. Wong, T. Pedersen, C. Heinselman, C. Mutiso, B. Bristow, J. Hughes, W. Wang   +8 more
doaj   +1 more source

The flapless air vehicle integrated industrial research (FLAVIIR) programme in aeronautical engineering [PDF]

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2009
This article describes an exciting research programme, FLAVIIR (flapless air vehicle integrated industrial research), in Aeronautical Engineering that is developing and demonstrating novel technologies and also forging a new approach to academic research, with emphasis on engagement with, and relevance to, industry.
openaire   +1 more source

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Calculation of the communication angles between an air vehicle and receiver antenna in aeronautical telemetry

IET Microwaves, Antennas & Propagation, 2010
To determine the immediate effect of an air vehicle's manoeuvre on the radio link of aeronautical telemetry, it is needed to calculate instant angles between such an air vehicle and a receiver antenna. Having determined the communication angles of the air vehicle, the instantaneous gains from transmitter antennas can be calculated, thus evaluating the ...
S, Marzban, K, Mohamedpour
openaire   +2 more sources

Synergistic Enhancement of Electrical‐Thermal Properties in KH550/G‐POSS Functionalized BN/Epoxy Composites for High‐Frequency Transformer Insulation

Advanced Science, EarlyView.
A BN@G‐POSS/EP nanocomposite is developed for high‐frequency transformer insulation in power electronic transformers. Through synergistic interface engineering, it simultaneously enhances thermal conductivity, reduces viscosity, and improves electro‐thermal stability.
Jun Jiang, Shaojie Luo, Dezhi Cui, Zeya Huang, Shuai Jiang, Renli Fu, Yuan Wang   +6 more
wiley   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Sulfide‐Based Electrolytes for All‐Solid‐State Sodium Batteries

Advanced Energy Materials, EarlyView.
This review covers the structural features and synthesis strategies of sulfide‐based solid electrolytes, as well as critical challenges related to conductivity, interfacial and moisture stability, and scaling‐up for practical application in Sodium‐based All Solid‐State Batteries.
Han Yang, Luca Weckelmann, Baolin Wu, Chih‐Long Tsai, Luc Raijmakers, Rüdiger‐A. Eichel, Anna Windmüller   +6 more
wiley   +1 more source

In-flight Wingtip Folding: Inspiration from the XB-70 Valkyrie

International Journal of Aviation, Aeronautics, and Aerospace, 2019
Wingip folding can be used to extend aircraft wingspan, allowing designers to take advantage of reduced induced drag whilst respecting ground operational limitations.
Gaétan X Dussart, Mudassir Lone, Ciaran O'Rourke, Thomas Wilson   +3 more
doaj   +1 more source

Time-Series Prediction for Amount of Airworthiness Based on Time-Delay Neural Networks

Elektronika ir Elektrotechnika, 2020
Troposphere and the first stratum of the stratosphere are intensely utilized atmosphere layers for the aviation activities. Due to the different performances, capabilities, designs, and equipment of the aerial vehicles, meteorological weather events that
Ali Tatli, Sinem Kahvecioglu, Hikmet Karakoc   +2 more
doaj   +1 more source