Results 51 to 60 of about 15,621 (306)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang   +3 more
wiley   +1 more source

The mechanosensitive lncRNA Neat1 promotes osteoblast function through paraspeckle-dependent Smurf1 mRNA retention

open access: yesBone Research, 2022
Mechanical stimulation plays an important role in bone remodeling. Exercise-induced mechanical loading enhances bone strength, whereas mechanical unloading leads to bone loss.
Caizhi Liu   +24 more
doaj   +1 more source

Tracing Three Decades of Low Earth Orbit Satellite Communication Development: A Bibliometric and Main Path Analysis of Network Architectures, Protocol Evolution, and Emerging Intelligent Services

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Low Earth Orbit (LEO) satellite communication systems have evolved into a critical component of global broadband networks, enabling wide‐area connectivity, IoT services, and intelligent multilayer satellite–terrestrial integration. Despite rapid advancements in constellation deployment, routing mechanisms, resource management, and LEO–5G/6G ...
Wei‐Hao Su   +2 more
wiley   +1 more source

Proposing a Framework to Center Justice in Ambitious Science Teaching

open access: yesScience Education, EarlyView.
ABSTRACT Though educators and researchers have developed shared theory and language for priorities necessary to disrupt the status quo toward more equitable science education, we lack a tool that organizes sets of teaching practices across an instructional unit to support enactment and rehearsal.
April Luehmann   +8 more
wiley   +1 more source

Analysis of age as a factor in NASA astronaut selection and career landmarks.

open access: yesPLoS ONE, 2017
NASA's periodic selection of astronauts is a highly selective process accepting applications from the general population, wherein the mechanics of selection are not made public.
Gregory T A Kovacs, Mark Shadden
doaj   +1 more source

From Proxies to System State: Defining Sustainability Management Against Symbolic Progress

open access: yesSustainable Development, EarlyView.
ABSTRACT Sustainability in management is often measured through scores, ratings, and disclosure narratives that can reward symbolic progress while leaving underlying social‐ecological conditions unchanged. This perspective paper offers a definition of Sustainability Management as how organizations plan, organize, lead, and control (four management ...
Yiping Zhang, Olaf Weber
wiley   +1 more source

Neck Muscle Changes Following Long-Duration Spaceflight

open access: yesFrontiers in Physiology, 2019
The effects of long-duration spaceflight on crewmember neck musculature have not been adequately studied. The purpose of this study was to evaluate the changes in the neck musculature on pre-flight and post-flight magnetic resonance imaging (MRI ...
Kyle P. McNamara   +9 more
doaj   +1 more source

Optimized electroencephalogram and functional near-infrared spectroscopy-based mental workload detection method for practical applications

open access: yesBioMedical Engineering OnLine, 2022
Background Mental workload is a critical consideration in complex man–machine systems design. Among various mental workload detection techniques, multimodal detection techniques integrating electroencephalogram (EEG) and functional near-infrared ...
Hongzuo Chu   +7 more
doaj   +1 more source

Astronaut

open access: yes, 2022
A military man looking at astronaut suits.https://digitalcommons.cwu.edu/john_foster_photos/1298/thumbnail ...
Foster, John
core  

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

open access: yesSmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen   +12 more
wiley   +1 more source

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