Results 21 to 30 of about 5,289,200 (291)

Experimental study on electrostatic migration of different mineral particles composing lunar dust under electron irradiation

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Dust electrostatic migration is one of the primary causes of dust events on the surface of airless celestial bodies, which can result in multiple dust phenomena, including lunar horizon glow and dust pools, and also offer crucial insights into the ...
Hong Gan   +7 more
doaj   +1 more source

Exploring the Intermembrane Space [PDF]

open access: yesACS Chemical Biology, 2007
Despite the importance that many components of the intermembrane space (IMS) of mitochondria play in cellular function, the targeting sequences that are responsible for transporting proteins to this subcellular compartment are not fully understood.
openaire   +2 more sources

Simulation Research and Analysis of Wavelength Modulation Off-Axis Integrated Cavity Output Spectrum Measurement System

open access: yesSensors
Wavelength modulation spectroscopy off-axis integrated cavity output spectroscopy (WMS-OA-ICOS) is an in situ detection technique suitable for analyzing trace gases in the atmospheres, characterized by its high sensitivity and ease of integration ...
Tao Wu   +10 more
doaj   +1 more source

Advancements in Mars Habitation Technologies and Terrestrial Simulation Projects: A Comprehensive Review

open access: yesAerospace
This review examines advancements in Mars habitation technologies, emphasizing Earth-based analog missions and closed-loop life support systems critical for long-duration human presence on the Red Planet.
Yubin Zhong   +7 more
doaj   +1 more source

Quasi-Self-Motion-Based Singularity Avoidance for Free-Floating Space Robots

open access: yesAerospace
We propose a novel singularity-avoidance method for continuous path planning that maintains zero path-tracking error of a non-redundant free-floating space robot (FFSR).
Xinghong Huang   +5 more
doaj   +1 more source

PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite

open access: yesEarth, Planets and Space, 2023
Evaluating the molecular distribution of organic compounds in pristine extraterrestrial materials is cornerstone to understanding the abiotic synthesis of organics and allows us to better understand the molecular diversity available during the formation ...
José C. Aponte   +34 more
doaj   +1 more source

Imaging in Space Exploration [PDF]

open access: yesAmerican Journal of Neuroradiology, 2011
I remember the amazement I felt when man walked on the moon. Today, I feel that monies spent on space exploration would be better used in green energy and ocean preservation programs. We already live on earth, the most perfect spaceship of all: Why go beyond it?
openaire   +2 more sources

Understanding the CO2 Scrubber Used at the Space Analog for the Moon and Mars

open access: yes, 2023
Immediate accessThis item is made available by the University of Arizona Center for Human Space Exploration (CHaSE) with support from the University of Arizona Libraries.
Tresch, Trent
core   +1 more source

Robust joint estimation of galaxy redshift and spectral templates using online dictionary learning

open access: yesAstronomy & Astrophysics
Context. We present a novel approach to analyzing astronomical spectral survey data using our non-linear extension of an online dictionary learning algorithm.
Bryan S.   +7 more
doaj   +1 more source

Scarcity of scale-free topology is universal across biochemical networks

open access: yesScientific Reports, 2021
Biochemical reactions underlie the functioning of all life. Like many examples of biology or technology, the complex set of interactions among molecules within cells and ecosystems poses a challenge for quantification within simple mathematical objects ...
Harrison B. Smith   +2 more
doaj   +1 more source

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