Results 41 to 50 of about 23,619 (166)

PROBLEMS OF CREATION OF AIRCRAFT CATEGORY PLANES ACCORDING TO ENVIRONMENTAL LIMITATIONS

Авіаційно-космічна техніка та технологія, 2020
With the growth of air transportation on airplanes of the transport category, their negative impact on the environment and humans increases. The environmental impact of civil aviation began to be addressed in the early 70s of the 20th century. There are
Александр Васильевич Лось, Виктор Иванович Рябков, Татьяна Николаевна Середа   +2 more
doaj   +1 more source

Pholidota‐Inspired Electronic Skin Possessing Terahertz‐Wave Reflection–Absorption–Transmission Switchability

Advanced Science, Volume 13, Issue 37, 3 July 2026.
The pholidota‐inspired electronic skin is successfully constructed, originally realized four‐state reversible switching of terahertz‐wave reflection, absorption, transmission, and secondary reflection. In response to external demands, it issues deformation instructions, verifies the deformation state after the equipment executes the action, and thus ...
Shangjing Li, Jiangsong Hou, Yifeng Ruan, Jiang Du, Jun Qiu   +4 more
wiley   +1 more source

Optimal design for low sonic boom based on CoKriging surrogate model

Hangkong gongcheng jinzhan
Accurately predicting and effectively reducing sonic boom levels is one of the key issues in the development of the new generation of green supersonic civil aircraft.
ZHANG Hanqi, XU Yue, ZHONG Min, LI Yan
doaj   +1 more source

International principles and standards for the practice of ecological restoration. Third edition

Restoration Ecology, Volume 34, Issue S2, June 2026.
Abstract Introduction Growth in understanding of ecological restoration necessitates updated guidance for effective, equitable, and outcome‐oriented restoration across terrestrial, inland water, and coastal and marine ecosystems. The third edition of the Society for Ecological Restoration (SER) International Principles and Standards for the Practice of
George D. Gann, Tein McDonald, Bethanie Walder, James Aronson, Cara R. Nelson, James G. Hallett, Manuel R. Guariguata, Emily K. Gonzales, Fangyuan Hua, Cristian Echeverría, Cristina Eisenberg, Junguo Liu, Kris Decleer, Zoe E. Barr, David C. Bartholomew, Marina Best, Robin Chazdon, An Cliquet, Jordi Cortina‐Segarra, Harmender Kalirai, Keith MacCallum, Amarizni Mosyaftiani, Simone Pedrini, Renee Young, Kingsley W. Dixon   +24 more
wiley   +1 more source

Shock‐Assisted Flow Control System in Convergent‐Divergent Nozzle: A Numerical Study on Unconventional Protuberance With Different Geometry

Engineering Reports, Volume 8, Issue 5, May 2026.
A numerical investigation using 3D RANS simulations demonstrates significant effects of protuberance geometry—cubic, cylindrical, spherical, and conical—on shock‐induced thrust vectoring in supersonic nozzles. Cubic protuberances provide the maximum jet deflection (˜2°) with negligible thrust reduction.
Mohammadreza Soufivand, Davood Mokhtari, Mohammad Hojaji, Annunziata D'Orazio   +3 more
wiley   +1 more source

The Role of Propellant Type, Re‐Entry, and Plume Reactions in the Atmospheric Impacts of Spaceflight

Earth's Future, Volume 14, Issue 5, May 2026.
Abstract The space industry is growing rapidly, and over the coming years the number of annual rocket launches is expected to increase further. This increases the sector's emissions and environmental effects, both of which are not yet comprehensively understood.
Yvar S. W. Vliex, Jurriaan A. van 't Hoff, Irene C. Dedoussi   +2 more
wiley   +1 more source

Research on the layout design and optimization method for low drag and low sonic boom supersonic civil aircraft

Kongqi donglixue xuebao
Supersonic civil aircraft have become one of the important directions for the future development of civil aviation. For the rapid conceptual design and performance optimization of supersonic civil aircraft layouts, an aerodynamic optimization framework ...
Qinze Zheng, Yu Liang, Chong Pan, Lifeng Wang   +3 more
doaj   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, Volume 7, Issue 3, March 2026.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Additive Manufacturing of Cobalt Iron Oxide‐Based Photopolymer Resin Magnetoactive Polymer Composites Through Stereolithography

Macromolecular Materials and Engineering, Volume 311, Issue 3, March 2026.
In this study, novel resin/cobalt iron oxide magnetic actuation polymer composites (MAPCs) are synthesized and optimized for stereolithography (SLA)‐based 3D printing. Printing parameters are tuned for dimensional accuracy and print quality. Comprehensive physicochemical, mechanical, and magnetic characterization identifies the optimal formulation ...
Ambreen Afridi, Ans Al Rashid, Muammer Koç   +2 more
wiley   +1 more source

Analysis of Flight Mechanics of a new Civil Supersonic Aircraft Conceptual Design [PDF]

The DLR-project STORMIE investigates novel concepts for supersonic passenger transport, with a particular focus on low boom characteristics. Three aircraft designs are being developed and analyzed for this purpose. This paper presents a flight mechanics analysis of one of these aircraft designs - a supersonic business jet - conducted during the early ...
Christmann, Carsten, Sachs, Falk, Kirz, Jochen   +2 more
openaire   +1 more source