Results 31 to 40 of about 164,975 (347)
Applied Sciences, 2020 Impact cratering experiments were performed on semi-infinite concrete targets with 7 mm-diameter 40CrNiMo steel long-rod projectiles at impact velocities ranging from 2117 m/s to 3086 m/s by using a two-stage combustion light-gas gun.
Yangyu Lu +6 more
doaj +1 more source
Automatic Mapping of Small Lunar Impact Craters Using LRO‐NAC Images
Earth and Space Science, 2022 Impact craters are the most common feature on the Moon’s surface. Crater size–frequency distributions provide critical insight into the timing of geological events, surface erosion rates, and impact fluxes.
J. H. Fairweather +5 more
doaj +1 more source
Locating the LCROSS Impact Craters [PDF]
Space Science Reviews, 2011 The Lunar CRater Observations and Sensing Satellite (LCROSS) mission impacted a spent Centaur rocket stage into a permanently shadowed region near the lunar south pole. The Sheperding Spacecraft (SSC) separated \sim9 hours before impact and performed a small braking maneuver in order to observe the Centaur impact plume, looking for evidence of water ...
Zachary Moratto +11 more
openaire +4 more sources
Limnology and Oceanography, Volume 67, Issue 12, Page 2718-2733, December 2022., 2022 Abstract Continental freshwater systems are particularly vulnerable to environmental variation. Climate change‐induced desertification and the anthropogenic exploitation of hydric resources result in the progressive evaporation and salinization of inland water bodies in many areas of the globe.
Miguel Iniesto +6 more
wiley +1 more source
Expectations for the Deep Impact collision from cometary nuclei modelling [PDF]
, 2005 Using the cometary nucleus model developed by Espinasse et al. (1991), we calculate the thermodynamical evolution of Comet 9P/Tempel 1 over a period of 360 years.
Klinger, Jurgen +3 more
core +4 more sources
Depth of Cracking beneath Impact Craters: New Constraint for Impact Velocity [PDF]
, 2002 Both small-scale impact craters in the laboratory and less than 5 km in diameter bowl-shaped craters on the Earth are strength (of rock) controlled. In the strength regime, crater volumes are nearly proportional to impactor kinetic energy.
Ahrens, Thomas J. +2 more
core +1 more source
A comparative analysis of two Early Palaeozoic marine impact structures in Estonia, Baltic Sea: Neugrund and Kärdla [PDF]
Bulletin of the Geological Society of Finland, 2013 Kärdla and Neugrund are two Early Palaeozoic offshore impact structures located some 50 km apart along the Estonian coast of the Baltic Sea. They share many similarities but differing features are also found. The Kärdla impact structure is located at the
S. Suuroja, K. Suuroja, T. Flodén
doaj +1 more source
Automatic Crater Shape Retrieval using Unsupervised and Semi-Supervised Systems [PDF]
arXiv, 2022 Impact craters are formed due to continuous impacts on the surface of planetary bodies. Most recent deep learning-based crater detection methods treat craters as circular shapes, and less attention is paid to extracting the exact shapes of craters.
arxiv
Remote Sensing in Ecology and Conservation, Volume 8, Issue 6, Page 808-826, December 2022., 2022 The Ngorongoro Conservation Area (NCA), a UNESCO World Heritage Site, is globally important for biodiversity conservation due to the presence of iconic megafauna. For decades now, the NCA is experiencing a number of notoriously difficult to address challenges; understanding its land cover dynamics is therefore increasingly important to improve habitat ...
Joana Borges +8 more
wiley +1 more source
PyNAPLE: Lunar Surface Impact Crater Detection [PDF]
, 2022 In the last 20 years, over 600 impact flashes have been documented on the lunar surface. This wealth of data presents a unique opportunity to study the meteoroid flux of the Earth-Moon environment, and in recent years the physical properties of the impactors.
arxiv +1 more source