Results 51 to 60 of about 48,655 (224)
Heat protection apparatus Patent [PDF]
, 1966 Development of thermal insulation system for wing and control surfaces of hypersonic aircraft and reentry ...
Hill, P. R., Trout, O. F., Jr.
core +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
Propagation of Elastic Waves in a One-Dimensional High Aspect Ratio Nanoridge Phononic Crystal
Applied Sciences, 2018 We investigate the propagation of elastic waves in a one-dimensional (1D) phononic crystal constituted by high aspect ratio epoxy nanoridges that have been deposited at the surface of a glass substrate.
Abdellatif Gueddida +4 more
doaj +1 more source
When does category spanning hurt or help producers?
Strategic Management Journal, EarlyView.Abstract Research Summary Scholars have theorized many factors shaping whether category spanning helps or hurts producers. We first synthesize evidence by meta‐analyzing 25 years of empirical research, which reveals a null effect of spanning on average, yet with significant subsample heterogeneity. To unpack it, we theorize and find that spanning hurts
Jungsoo Ahn +2 more
wiley +1 more source
Influence of Incident Shock on Fuel Mixing in Scramjet
Applied SciencesDuring the operation of hypersonic vehicles, a reciprocal coupling effect is manifested between the inlet and the combustion chamber. This results in an unavoidable non-uniformity of conditions at the combustion chamber’s entrance, which, in turn ...
Chao Wang +3 more
doaj +1 more source
Collaborating in future states—Contextual instability, paradigmatic remaking, and public policy
Australian Journal of Public Administration, EarlyView.Abstract Collaboration is ubiquitous in public policy life, with its presence and profile determined by prevailing governance conditions. Commitments to globalisation and marketisation in the latter part of the 20th century marked the onset of an era defined by collaboration, between and across tiers and spheres of government, with non‐state actors ...
Helen Sullivan
wiley +1 more source
Advances in Research on High-Mach-Number Electromagnetic Flow Control Effectiveness
气体物理The electromagnetic flow control technology under high-altitude and high-speed flight conditions can be applied in multiple fields such as thermal protection, separation zone control, alleviating ionization blackout problems, aerodynamic shape design ...
Yang DU, Jun LIU
doaj +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
An Analysis of the Factors Influencing Dual Separation Zones on a Plate
Applied SciencesThe shock wave/boundary layer interaction phenomenon in hypersonic inlets, affected by background waves, may induce the formation of multiple separation zones.
Jiarui Zou, Xiaoqiang Fan, Bing Xiong
doaj +1 more source
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