Results 31 to 40 of about 8,140 (235)

A 3D‐Printed SFE‐Graded Alloy Mitigates Cryogenic Discontinuous Plastic Flow and Hydrogen Embrittlement

open access: yesAdvanced Science, EarlyView.
A novel strategy features gradient composition and stacking fault energy‐tuned (CoCrMn)100‐2xFexNix fabricated via in situ alloying additive manufacturing. This design circumvents cryogenic discontinuous plastic flow and hydrogen embrittlement of metallic materials under quasi‐static loading and hydrogen‐rich environment relevant to lunar polar ...
Renhao Wu   +11 more
wiley   +1 more source

A Case Study Analysis for Designing a Lunar Navigation Satellite System with Time Transfer from the Earth GPS

open access: yesNavigation, 2023
There is growing interest in designing a future lunar navigation satellite system (LNSS) while utilizing a SmallSat platform. However, many design decisions, e.g., regarding the satellite clock and lunar orbit, are yet to be finalized. In our prior work,
Sriramya Bhamidipati   +2 more
doaj   +1 more source

Morphological and morphometric aspects of the equine aortic valve: New insights for comparative studies in mammals

open access: yesThe Anatomical Record, EarlyView.
Abstract New data on the equine aortic valve obtained using advanced techniques is especially important given the greater availability of animal models for translational research. Here we characterized the morphological and morphometric aspects of the equine aortic valve from 60 healthy hearts collected at equine abattoirs.
Vitor Pires Pereira   +3 more
wiley   +1 more source

Morpho‐functional analyses of the jaw apparatus in the Blue‐and‐yellow Macaw (Ara ararauna, Psittaciformes, Aves): Adaptations to feeding behavior

open access: yesThe Anatomical Record, EarlyView.
Abstract Macaws are renowned for processing dry, mechanically resistant fruits, yet the species‐level anatomical and functional correlates of this performance remain incompletely resolved. We examined the feeding apparatus of the Blue‐and‐yellow Macaw (Ara ararauna) using an integrated approach that combines osteology, myology, and bite‐force estimates
Sérgio R. Posso   +2 more
wiley   +1 more source

A review of the construction of the supporting energy system for the lunar base

open access: yesFrontiers in Astronomy and Space Sciences
Since the 20th century, humanity has entered the era of deep - space exploration. The Moon, being close to Earth, is a key target. Building a lunar base is crucial for space exploration and resource use, but requires a reliable energy system.
Song Lei   +5 more
doaj   +1 more source

Lunar Infrastructure Construction: Task Requirements and Key Technologies [PDF]

open access: yes中国工程科学
It has become an international trend for lunar exploration objectives to shift toward "emphasizing both understanding and utilization." Lunar infrastructure construction (LIC) will become a critical element in humanity's development and utilization of ...
Cheng Zhou   +4 more
doaj   +1 more source

Application Prospect of Fission-Powered Spacecraft in Solar System Exploration Missions

open access: yesSpace: Science & Technology, 2021
Fission power is a promising technology, and it has been proposed for several future space uses. It is being considered for high-power missions whose goal is to explore the solar system and even beyond.
Y. Xia   +5 more
doaj   +1 more source

The Strategic Role of Sustainability Certifications: A Multi‐Theoretical Framework and Comparative Analysis in the Global Wine Industry

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT Sustainability certifications are increasingly embedded in the governance and competitiveness of the wine sector, yet their strategic role remains under‐theorised. This study conceptualises certifications as multidimensional strategic mechanisms and conducts a comparative analysis of 50 schemes used in the global wine industry.
Alexy Apolo‐Romero   +2 more
wiley   +1 more source

Water Electrolysis Technologies for Extraterrestrial Water Resource Conversion

open access: yesEcoEnergy, EarlyView.
This paper reviews four water electrolysis technologies for extraterrestrial water conversion: alkaline water electrolysis, proton exchange membrane water electrolysis, solid oxide water electrolysis, and anion exchange membrane water electrolysis. It elaborates on their mechanisms, components, and integration, highlighting challenges such as water ...
Yawen Jiang   +6 more
wiley   +1 more source

Lunar Robotic Construction System Using Raw Regolith: System Engineering

open access: yesAerospace
This paper outlines the system engineering of a Lunar Robotic Construction System (LRCS) for the bagging and manipulation of Regolith Containment Units (RCUs) on the lunar surface.
Ketan Vasudeva, M. Reza Emami
doaj   +1 more source

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