Results 51 to 60 of about 34,777 (278)

Oligotrophic Growth of Nitrate-Dependent Fe2+-Oxidising Microorganisms Under Simulated Early Martian Conditions

Frontiers in Microbiology, 2022
Nitrate-dependent Fe2+ oxidation (NDFO) is a microbially mediated process observed in many anaerobic, low-nutrient (oligotrophic) neutral–alkaline environments on Earth, which describes oxidation of Fe2+ to Fe3+ in tandem with microbial nitrate reduction.
Alex Price, Michael C. Macey, Victoria K. Pearson, Susanne P. Schwenzer, Nisha K. Ramkissoon, Karen Olsson-Francis   +5 more
doaj   +1 more source

Terrestrial Lithium Exploration Adapted From Raman Diagnosis of Phyllosilicates for Mars

Journal of Raman Spectroscopy, EarlyView.
Analyses using a benchtop Raman instrument at the University of Aberdeen and a prototype instrument for remote deployment on Mars based at the University of Leicester successfully discriminated between four varieties of mica (possibly lithium‐rich rocks).
M. McHugh, J. R. T. Armstrong, J. Parnell, H. N. Lerman, C. Malherbe, I. B. Hutchinson   +5 more
wiley   +1 more source

Decadal Variability of Differential Frost Heave on Incipient Sorted Patterned Ground in the Southern Japanese Alps

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Differential frost heave between fine (earthy) and coarse (gravelly) domains was monitored over 10 years (2013–2023) on a mountain‐top flat ground subjected to both frequent diurnal and deep seasonal freezing. Monitoring objects include, ground heave, soil temperature down to 55 cm, soil moisture, air temperature, rainfall, and snow depth. The
Norikazu Matsuoka
wiley   +1 more source

Learning the Link between Albedo and Reflectance: Machine Learning-Based Prediction of Hyperspectral Bands from CTX Images

Remote Sensing, 2022
The instruments of the Mars Reconnaissance Orbiter (MRO) provide a large quantity and variety of imagining data for investigations of the Martian surface.
Sergej Stepcenkov, Thorsten Wilhelm, Christian Wöhler   +2 more
doaj   +1 more source

Interactions of rare earth elements with living organisms and emerging biotechnical applications

PLANTS, PEOPLE, PLANET, EarlyView.
Rare earth elements (REEs) are critical resources required to achieve net‐zero carbon emission targets and energy security. However, rising demand for REEs coupled with significant extraction and processing challenges and geopolitical risks restricts access to REE resources.
Samantha A. McGaughey, Shagufta Iqbal, Annamaria De Rosa, Jessica A. Caley, Anna H. Kaksonen, Denys Villa‐Gomez, Caitlin S. Byrt   +6 more
wiley   +1 more source

Radiation-induced alteration of apatite on the surface of Mars: first in situ observations with SuperCam Raman onboard Perseverance

Scientific Reports
Planetary exploration relies considerably on mineral characterization to advance our understanding of the solar system, the planets and their evolution.
E. Clavé, O. Beyssac, S. Bernard, C. Royer, G. Lopez-Reyes, S. Schröder, K. Rammelkamp, O. Forni, A. Fau, A. Cousin, J. A. Manrique, A. Ollila, J. M. Madariaga, J. Aramendia, S. K. Sharma, T. Fornaro, S. Maurice, R. C. Wiens, the SuperCam Science team   +18 more
doaj   +1 more source

Advances and Trends in Terrain Classification Methods for Off‐Road Perception

Journal of Field Robotics, EarlyView.
ABSTRACT Off‐road autonomous vehicles (OAVs) are becoming increasingly popular for navigating challenging environments in agriculture, military, and exploration applications. These vehicles face unique challenges, such as unpredictable terrain, dynamic obstacles, and varying environmental conditions.
Tanzila Arafin, Anwar Hosen, Zoran Najdovski, Lei Wei, Mohammad Rokonuzzaman, Michael Johnstone   +5 more
wiley   +1 more source

Boundary Delineator for Martian Crater Instances with Geographic Information and Deep Learning

Remote Sensing, 2023
Detecting impact craters on the Martian surface is a critical component of studying Martian geomorphology and planetary evolution. Accurately determining impact crater boundaries, which are distinguishable geomorphic units, is important work in ...
Danyang Liu, Weiming Cheng, Zhen Qian, Jiayin Deng, Jianzhong Liu, Xunming Wang   +5 more
doaj   +1 more source

Space Economy and Sustainability: A Systematic Review

Sustainable Development, EarlyView.
ABSTRACT The space economy is booming thanks to the increasing investment of government agencies, private companies, and venture capitalists. From the beginning of the New Space era, the array of actors involved in the development of technologies for extra‐terrestrial activities has increased, as well as the downstream applications that foster ...
Marianna Valente, Federico Caviggioli, Lara Agostini   +2 more
wiley   +1 more source

Physically Based Real‐Time Rendering of Eclipses

Computer Graphics Forum, EarlyView.
Abstract We present a novel approach for simulating eclipses, incorporating effects of light scattering and refraction in the occluder's atmosphere. Our approach not only simulates the eclipse shadow, but also allows for watching the Sun being eclipsed by the occluder.
S. Schneegans, J. Gilg, V. Ahlers, G. Zachmann, A. Gerndt   +4 more
wiley   +1 more source