Results 91 to 100 of about 431,722 (333)

Ultrahigh Strength with Suppressed Flow Instability at Liquid Helium Temperature via Coherent Nanoprecipitation in a Medium‐Entropy Alloy

open access: yesAdvanced Functional Materials, EarlyView.
It is demonstrated that severe lattice distortion and coherent nanoprecipitates overcome the strength–ductility dilemma and mitigate discontinuous plastic flow (DPF) at 4.2 K. Such microstructural design enhances both thermal and athermal stress components, leading to exceptional mechanical performance.
Min Young Sung   +11 more
wiley   +1 more source

Electrostatic dust shield system used for Lunar and Mars exploration equipment

open access: yesNihon Kikai Gakkai ronbunshu, 2014
A unique shield system has been developed utilizing electrostatic force to remove dust breaking into bearings and mechanical seals of equipment used for space exploration.
Masato ADACHI, Hiroyuki KAWAMOTO
doaj   +1 more source

NASA-universities relationships in aero/space engineering: A review of NASA's program [PDF]

open access: yes
NASA is concerned about the health of aerospace engineering departments at U.S. universities. The number of advanced degrees in aerospace engineering has declined.

core   +1 more source

A First Course in Software Engineering for Aerospace Engineers [PDF]

open access: yes, 2006
Software is a critical component of mission capability in all aerospace systems. This capability is realized directly through the use of onboard software, and enabled through the use of software on ground support systems.
Lundqvist, Kristina   +1 more
core  

Affordances and Safe Design of Assistance Wearable Virtual Environment of Gesture [PDF]

open access: yes, 2015
Safety and reliability are the main issues for designing assistance wearable virtual environment of technical gesture in aerospace, or health application domains.
Fass, Didier
core   +5 more sources

Reconfigurable Metamirrors Based on Compliant Mechanisms

open access: yesAdvanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy   +3 more
wiley   +1 more source

Application of Near-Space High-Altitude Balloon in Earth Observation

open access: yesApplied Sciences
Near space, as a critical atmospheric domain with unique physical, electromagnetic, and biological characteristics, remains a frontier with extensive unresolved scientific questions in atmospheric physics, electromagnetic environment dynamics, and ...
Zhanchao Wang   +7 more
doaj   +1 more source

Development of folding method of spherical membrane in both radial and axial directions

open access: yesNihon Kikai Gakkai ronbunshu, 2014
The purpose of this paper is to present a new folding method of spherical membrane by using origami technique. Because a creation of folding method for closed structures such as spherical shell has been one of the most difficult tasks within the works of
Fumiko SUGIYAMA, Taketoshi NOJIMA
doaj   +1 more source

Quantifying Spin Defect Density in hBN via Raman and Photoluminescence Analysis

open access: yesAdvanced Functional Materials, EarlyView.
An all‐optical method is presented for quantifying the density of boron vacancy spin defects in hexagonal boron nitride (hBN). By correlating Raman and photoluminescence signals with irradiation fluence, defect‐induced Raman modes are identified and established an relationship linking optical signatures to absolute defect densities. This enables direct
Atanu Patra   +8 more
wiley   +1 more source

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