Results 41 to 50 of about 3,747 (227)

Study on the performance mechanism of alumina-alkali activator synergistic solidified lunar soil simulant

Case Studies in Construction Materials
The utilization of lunar in-situ resources is an important way to realize the construction and operation of Moon scientific research base. The effect of alumina-alkali activator on the mechanical properties of solidified lunar soil simulant was studied ...
Qinyong Ma, Bobo Zhang
doaj   +1 more source

Terrain Classification for Planetary Rovers Using Wireless In‐Wheel Sensor Modules and Machine Learning

Journal of Field Robotics, EarlyView.
ABSTRACT Safe and reliable mobility over different kinds of ground is important for planetary rovers on space missions. Since terrain changes might affect the mobility of the rover, energy consumption, and safety, detecting the type of ground in real‐time is vital.
Md Masrul Khan, Sultan Shaharea, Manseeb M. Mannaf, Shihab Ahemed, Fahim Islam Anik, Md Jarir Hossain, Helal An Nahiyan, Sourav Karmaker   +7 more
wiley   +1 more source

Survey on AI‐Enabled Computer Vision Technologies and Applications for Space Robotic Missions

Journal of Field Robotics, EarlyView.
ABSTRACT This survey provides a comprehensive overview of recent advancements and challenges in Artificial Intelligence (AI)‐enabled computer vision (CV) techniques for space robotic missions, spanning critical phases such as Entry, Descent, and Landing (EDL), orbital operations, and planetary surface exploration.
Maciej Quoos, Steven Kay, Julia Wajoras, Robert Field, Evridiki V. Ntagiou, Fakher Mohammad, Yang Gao   +6 more
wiley   +1 more source

Modeling the Reflectance of the Lunar Regolith by a New Method Combining Monte Carlo Ray Tracing and Hapke’s Model with Application to Chang’E-1 IIM Data

The Scientific World Journal, 2014
In this paper, we model the reflectance of the lunar regolith by a new method combining Monte Carlo ray tracing and Hapke’s model. The existing modeling methods exploit either a radiative transfer model or a geometric optical model. However, the measured
Un-Hong Wong, Yunzhao Wu, Hon-Cheng Wong, Yanyan Liang, Zesheng Tang   +4 more
doaj   +1 more source

Stratigraphic evidence for modern‐like glacier extents in south‐central Alaska within the last glacial period (MIS 3)

Boreas, EarlyView.
The last (Wisconsinan) glacial period was punctuated in North America by two glacial maxima, known as the Early and Late Wisconsinan glaciations. In Alaska, these maxima and their subsequent retreats have been the object of dating efforts to reconstruct local climatic events and compare them to global trends.
Bruno Belotti, Elizabeth J. Cassel, Timothy C. Bartholomaus, Michael G. Loso, Michael S. Christoffersen, John W. Holt   +5 more
wiley   +1 more source

Measurement and Uncertainty Analysis of Lunar Soil Water Content via Heating Flux Method

Aerospace, 2023
According to the big impact hypothesis, the moon should be very dry. However, more and more evidence from the remote sensing of the moon in recent years indicates that there is a lot of water in the moon’s polar regions.
Ziheng Liu, Huaiyu He, Jiannan Li, Jialong Hao, Junyue Tang, Zhiheng Zhang, Shengyuan Jiang, Guanxin Chi, Ranran Liu, Lei Wang, Hao Geng, Changbin Xue   +11 more
doaj   +1 more source

Gentrification Everywhere? Delinking Culture‐Led Regeneration From Gentrification

The Developing Economies, EarlyView.
ABSTRACT This paper challenges the prevalent use of “gentrification” (shishen hua [士紳化/仕紳化] or jinshen hua [縉紳化]) as a catch‐all critique of culture‐led regeneration and neighborhood transformations, including rent increases and shifts in aesthetic and tastes, in Sinophone Asia and beyond.
Desmond Hok‐Man Sham
wiley   +1 more source

Controlling soil disturbance of a lunar regolith simulant bed during depressurization in a vacuum chamber

Scientific Reports, 2021
A dusty thermal vacuum chamber (DTVC) containing a regolith simulant bed is essential for testing equipment and techniques related to lunar surface exploration.
Gyu-Hyun Go, Jangguen Lee, Taeil Chung, Byung Hyun Ryu, Hyunwoo Jin, Li Zhuang, Hyu Soung Shin, Jae Hyun Kim, Tae Sup Yun   +8 more
doaj   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Calculation of the Influence Zone for Planetary Sampling Based on DEM Simulation

International Journal of Aerospace Engineering, 2021
In the design of planetary sampling devices, calculating the reaction force acting on the sampling devices is crucial. According to related research, the influence zone caused by sampling plays an important role in calculating the reaction force.
Qian Li, Junping Li, Lanlan Xie
doaj   +1 more source