Results 41 to 50 of about 2,515 (186)
Actuators, 2022 In this paper, an opposing jet is applied to the space shuttle arc leading edge and the lifting body cone leading edge in the hypersonic condition of the rarefied flow field.
Yi Shen +5 more
doaj +1 more source
Advanced Science, EarlyView.This study unveils a microstructural‐compatibility design strategy that integrates reactive melt infiltration with plasma spraying to fabricate carbon fiber‐reinforced ZrC‐SiC composites. The deliberate incorporation of SiC into the ZrC coating releases heat accumulation, suppresses detrimental lamellar ZrO2 formation, and reduces residual stress. This
Hongkang Ou +6 more
wiley +1 more source
Applied SciencesThe aft-body mounted inlet of a hypersonic vehicle has garnered attention for its potential to shorten the propulsion system. This study aims to explore the influence of compression direction on the performance of the hypersonic inlet attached to the ...
Jingfan Chen, Xiaoqiang Fan, Bing Xiong
doaj +1 more source
Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen
Aerospace, 2022 This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi +5 more
doaj +1 more source
Oikos, EarlyView.Biodiversity can influence forest productivity, but this does not necessarily translate into higher provision of wood‐based Nature's contributions to people (NCP), as only a subset of the wood produced is used for each NCP. Biodiversity–NCP relationships therefore require further assessment.
Koggani Dickson Koggani +7 more
wiley +1 more source
AerospaceAdvanced airborne power generation technology represents one of the most effective solutions for meeting the electricity requirements of hypersonic vehicles during long-endurance flights.
Yiming Liu +3 more
doaj +1 more source
Sliding Mode Control in Aerospace Applications: A Survey
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley +1 more source
A “Tech First” Approach to Foreign Policy? The Three Meanings of Tech Diplomacy
Global Policy, EarlyView.ABSTRACT Scholars have recently argued that international politics is plagued by instability as the world rapidly transitions from one crisis to another. This state of “Permacrisis,” or permanent crises between states, is driven by technological innovations which create new kinds of crises and drive competitions between adversarial states.
Ilan Manor
wiley +1 more source
A Proposal for Long-Term Missions of Small Lunar Rovers Using an MLI Curtain System
International Journal of Aerospace Engineering, 2019 This paper proposes a lunar night survival method for small rovers using an MLI (Multilayer Insulation) curtain system for long-term missions. Until recently, it was difficult to install RHU (Radioisotope Heating Units) or other temperature maintenance ...
Jang-Joon Lee, Kyu-Hong Kim
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Evolving Geopolitics and Japan's Economic Security–Trade Nexus: ‘New Capitalism’ as a Balancing Act?
Global Policy, EarlyView.ABSTRACT Amid intensifying geopolitical tensions, governments increasingly perceive economic interdependence as a strategic vulnerability. Japan, situated geopolitically between two great powers—the United States and China—attempts to navigate geopolitics by prioritising economic security.
Minako Morita‐Jaeger
wiley +1 more source