Results 41 to 50 of about 36,948 (236)
NASA control research overview [PDF]
, 1984 An overview of NASA research activities related to the control of aeronautical vehicles is presented. A groundwork is laid by showing the organization at NASA Headquarters for supporting programs and providing funding.
Mciver, D. E.
core +1 more source
Dynamics and control of a class of underactuated mechanical systems [PDF]
, 1999 This paper presents a theoretical framework for the dynamics and control of underactuated mechanical systems, defined as systems with fewer inputs than degrees of freedom.
Kolmanovsky, Ilya +3 more
core +4 more sources
Tracking Climate and Environmental Attention: A News‐Based Composite Index
Corporate Social Responsibility and Environmental Management, EarlyView.ABSTRACT This study introduces the Climate and Environmental Attention Index, a composite indicator that tracks media attention to climate and environmental issues. Based on the Semantic Brand Score, the proposed index extracts significant signals from unstructured text, going beyond traditional measures of word frequency and sentiment.
Gianna Figà‐Talamanca +3 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 +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 +2 more
doaj +1 more source
IEEE Access, 2022 In this paper, we consider long range air-to-ground (AG) communication systems which support aeronautical platforms including unmanned aerial vehicles (UAVs) in the ultra high frequency (UHF) band. For such a system, we present the measurement based path
Jaesin Kim, Inkyu Lee
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ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.A PVDF‐HFP/poly(ionic liquid) dual‐matrix solid electrolyte plasticized with Pyr13TFSI exhibits enhanced ionic conductivity, thermal stability, and interfacial compatibility. The optimized morphology and Li+ solvation structure facilitate fast ion transport and robust cycling, highlighting its promise for safe, high‐performance lithium metal batteries.
Kangsheng Huang +9 more
wiley +1 more source
Design and Optimization of Aircraft Configuration for Minimum Drag
International Journal of Aviation, Aeronautics, and Aerospace, 2018 This paper presents a reliable and robust optimization for minimum drag of an aircraft at the conceptual design phase. Firstly, the conceptual design code was developed and existing Single Seat Aerobatic (SSA) aircraft was chosen to validate the ...
Zin Win Thu, Aung Myo Thu, Phyo Wai Thaw
doaj +1 more source
Diurnal Air–Surface Temperature Dynamics in Hong Kong: An Analysis Across Land Use and Climate Zones
International Journal of Climatology, EarlyView.Daytime and nighttime air temperature (Ta) from automatic weather stations and land surface temperature (Ts) derived from ASTER and Landsat 8–9 are used to examine the relationship between Ta and Ts. The spatial and statistical characteristics of Ta − Ts dynamics are further analysed across land use (LU) and local climate zones (LCZ).
Ibrahim Ademola Adeniran +4 more
wiley +1 more source
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 +1 more source