Results 51 to 60 of about 20,805,604 (297)
Qalamuna, 2019 Calendar is an expression of the rhythm of collective activity and at the same time serves to ensure its order. Therefore, various civilizations from ancient times to the present give serious attention to arranging their calendar systems in accordance ...
Nihayatur Rohmah
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Water Electrolysis Technologies for Extraterrestrial Water Resource Conversion
EcoEnergy, 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
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Applied SciencesThe development of the Lunar–Earth space urgently requires a miniaturized space laser communication system with a high speed and high sensitivity. However, traditional photon-counting communication and coherent communication technologies face challenges ...
Xintong Guo +5 more
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Monthly or menstrual? A scoping review of catamenial epilepsy and non‐menstrual seizure rhythms
Epilepsia, EarlyView.Abstract Objective Despite the reported high prevalence of catamenial epilepsy (CE), the condition remains poorly defined, with lack of consensus on what entails a menstrual‐related seizure exacerbation. Emerging evidence of multiday cycles of seizure activity, including about‐monthly cycles, present in both men and women, further confound the ...
Victoria Wong +4 more
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First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique
Mass Spectrometry Reviews, EarlyView.ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
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International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT The EAC‐1A lunar mare simulant, a silty sand, was selected by the European Astronaut Center (EAC) for use in the LUNA analogue facility's lunar simulation testbed. Its stress‐ and strain‐dependent shear modulus and damping ratio were determined via resonant column testing on specimens prepared either from ambient moisture material or oven ...
Christos Vrettos
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Design consideration for lunar based photovoltaic power systems [PDF]
IEEE Conference on Photovoltaic Specialists, 2002 A survey was made of factors that may affect the design of photovoltaic (PV) arrays for a lunar base. These factors, which include the lunar environment and system design criteria, are examined. A PV power system design with a triangular array geometry is discussed and compared to a nuclear reactor power system and a power system utilizing both nuclear
Hickman, J. M. +2 more
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Computational Analysis of the Vibrational Response of Lunar Regolith Made of Nonspherical Grains
International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.ABSTRACT Vibration‐based systems have shown that appropriately oriented and tuned mechanical oscillations can disrupt regolith interlocking and promote flow. Building on this evidence, the present study investigates vibration‐controlled granular discharge as a potential ISRU (In Situ Resource Utilization) strategy, with the aim of supporting ...
Lewis Traquair +4 more
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Interplanetary frontiers: terraforming from an invasion science perspective
Oikos, EarlyView.The pursuit of a multi‐planetary existence represents one of humanity's greatest frontiers. If applied justly, it offers an opportunity to extend its civilization's lifespan amid escalating sustainability crises on Earth. One approach increasingly gaining traction is terraforming, a hitherto theoretical ecological and evolutionary experiment revolving ...
Teun Everts +2 more
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Design and Characterization of the Multi-Band SWIR Receiver for the Lunar Flashlight CubeSat Mission
Remote Sensing, 2019 Lunar Flashlight (LF) is an innovative National Aeronautics and Space Administration (NASA) CubeSat mission that is dedicated to quantifying and mapping the water ice harbored in the permanently shadowed craters of the lunar South Pole.
Quentin Vinckier +6 more
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