Results 21 to 30 of about 82,273 (326)

Characterization of the Candidate Landing Region for Tianwen‐1—China's First Mission to Mars

Earth and Space Science, 2021
This paper presents our efforts to characterize the candidate landing region (109°–133°E, 23°–30°N) for Tianwen‐1, China's first mission to Mars, in terms of engineering safety and scientific significance. Topographic analysis reveals that the region has
Bo Wu, Jie Dong, Yiran Wang, Zhaojin Li, Zeyu Chen, Wai Chung Liu, Jiaming Zhu, Long Chen, Yuan Li, Wei Rao   +9 more
doaj   +1 more source

A Machine Learning Approach to Crater Classification from Topographic Data

Remote Sensing, 2019
Craters contain important information on geological history and have been widely used for dating absolute age and reconstructing impact history. The impact process results in a lot of ejected fragments and these fragments may form secondary craters ...
Qiangyi Liu, Weiming Cheng, Guangjian Yan, Yunliang Zhao, Jianzhong Liu   +4 more
doaj   +1 more source

Pitted terrains on (1) Ceres and implications for shallow subsurface volatile distribution

Geophysical Research Letters, 2017
Prior to the arrival of the Dawn spacecraft at Ceres, the dwarf planet was anticipated to be ice‐rich. Searches for morphological features related to ice have been ongoing during Dawn's mission at Ceres.
H. G. Sizemore, T. Platz, N. Schorghofer, T. H. Prettyman, M. C. De Sanctis, D. A. Crown, N. Schmedemann, A. Neesemann, T. Kneissl, S. Marchi, P. M. Schenk, M. T. Bland, B. E. Schmidt, K. H. G. Hughson, F. Tosi, F. Zambon, S. C. Mest, R. A. Yingst, D. A. Williams, C. T. Russell, C. A. Raymond   +20 more
doaj   +1 more source

YOLO-Crater Model for Small Crater Detection

Remote Sensing, 2023
Craters are the most prominent geomorphological features on the surface of celestial bodies, which is playing a crucial role in studying the formation and evolution of celestial bodies, as well as in landing and planning for surface exploration. Currently, the main automatic crater detection models and datasets focus on the detection of large and ...
Lingli Mu, Lina Xian, Lihong Li, Gang Liu, Mi Chen, Wei Zhang   +5 more
openaire   +2 more sources

Magnetic Field Signatures of Intermediate-sized Impact Craters on Mars

The Astrophysical Journal, 2023
Magnetic field signatures over impact craters provide constraints for the history of the Martian dynamo. Due to limitations of the spatial resolution of magnetic field models, previous studies primarily focused on large impact craters (mostly ≥ 500 km in
Kuixiang Zhang, Aimin Du, Can Huang, Hao Luo, Lin Tian, Yasong Ge, Jipeng Qin, Lei Wang   +7 more
doaj   +1 more source

Morphometric Analysis of Pluto’s Impact Craters

Remote Sensing, 2021
The scope of this work is to carry out a morphometric analysis of Pluto’s impact craters. A global Pluto digital elevation model (DEM) with a resolution of 300 m/px, created from stereoscopic pairs obtained by the New Horizons Mission, was used to ...
Caio Vidaurre Nassif Villaça, Alvaro Penteado Crósta, Carlos Henrique Grohmann   +2 more
doaj   +1 more source

A New Martian Crater Chronology: Implications for Jezero Crater [PDF]

The Astronomical Journal, 2021
Abstract Crater chronologies are a fundamental tool to assess the relative and absolute ages of planetary surfaces when direct radiometric dating is not available. Martian crater chronologies are derived from lunar crater spatial densities on terrains with known radiometric ages, and thus they critically depend on the Moon-to-Mars ...
openaire   +2 more sources

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Young Martian crater Gratteri and its secondary craters [PDF]

Journal of Geophysical Research: Planets, 2016
AbstractIn response to questions that have been raised about formation and effects of secondary craters on crater chronometry techniques, we studied properties of the secondary crater field around the young Martian primary ray crater Gratteri (diameter 7 km).
Quantin, Cathy, Popova, Olga, Hartmann, William K., Werner, Stephanie C.   +3 more
openaire   +4 more sources

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source