Results 1 to 10 of about 83,326 (348)

The influence of helium-induced defects on the migration of strontium implanted into SiC above critical amorphization temperature

open access: yesFrontiers in Materials, 2023
The presence of radiation-induced defects and the high temperature of implantation are breeding grounds for helium (He) to accumulate and form He-induced defects (bubbles, blisters, craters, and cavities) in silicon carbide (SiC).
T. F. Mokgadi   +11 more
doaj   +1 more source

Advective structures of the bottom of lake Natron and its surroundings (Tanzania)

open access: yesРуды и металлы, 2022
In this study we consider the features of the development of weakly lithified bottom sediments and the general structure of lake Natron against the background of its seasonal drying and watering.
Alexander N. Baryshev
doaj   +1 more source

What Is a Polygonal Impact Crater? A Proposed Framework Toward Quantifying Crater Shapes

open access: yesEarth and Space Science, 2023
Impact craters are used for a wide array of investigations of planetary surfaces. A crater form that is somewhat rare, forming only ∼10% of impact craters, is the polygonal impact crater (or PIC).
Stuart J. Robbins, Jamie D. Riggs
doaj   +1 more source

YOLO-Crater Model for Small Crater Detection

open access: yesRemote 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   +5 more
openaire   +2 more sources

Shaping of the Present-Day Deep Biosphere at Chicxulub by the Impact Catastrophe That Ended the Cretaceous

open access: yesFrontiers in Microbiology, 2021
We report on the effect of the end-Cretaceous impact event on the present-day deep microbial biosphere at the impact site. IODP-ICDP Expedition 364 drilled into the peak ring of the Chicxulub crater, México, allowing us to investigate the microbial ...
Charles S. Cockell   +24 more
doaj   +1 more source

Survival of Ancient Lunar Water Affected by Topographic Degradation of Old, Large Complex Craters

open access: yesGeophysical Research Letters, 2022
Lunar water is redistributed by various processes. Topographic diffusion affects the transport of water and contributes to its preservation in subsurface layers.
C. L. Talkington   +7 more
doaj   +1 more source

New Lunar Crater Production Function Based on High-Resolution Images

open access: yesRemote Sensing, 2023
The lunar crater production function describes the general pattern of the size–frequency distribution of craters on the lunar surface, and it is the foundation of the surface dating method via crater counting.
Jianan Liu   +4 more
doaj   +1 more source

First Digits’ Shannon Entropy

open access: yesEntropy, 2022
Related to the letters of an alphabet, entropy means the average number of binary digits required for the transmission of one character. Checking tables of statistical data, one finds that, in the first position of the numbers, the digits 1 to 9 occur ...
Welf Alfred Kreiner
doaj   +1 more source

Depth to Diameter Analysis on Small Simple Craters at the Lunar South Pole—Possible Implications for Ice Harboring

open access: yesRemote Sensing, 2022
In this paper, we present a study comparing the depth to diameter (d/D) ratio of small simple craters (200–1000 m) of an area between −88.5° to −90° latitude at the lunar south pole containing Permanent Shadowed Regions (PSRs) versus craters without PSRs.
Ramiro Marco Figuera   +3 more
doaj   +1 more source

Comparison of Automated Crater Catalogs for Mars From Benedix et al. (2020) and Lee and Hogan (2021)

open access: yesEarth and Space Science, 2023
Crater mapping using neural networks and other automated methods has increased recently with automated Crater Detection Algorithms (CDAs) applied to planetary bodies throughout the solar system. A recent publication by Benedix et al.
C. Lee
doaj   +1 more source

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