Results 101 to 110 of about 7,235 (257)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Vog: Using Volcanic Eruptions to Estimate the Health Costs of Particulates

The Economic Journal, EarlyView., 2018
The negative consequences of long‐term exposure to particulate pollution are well established but a number of studies find no effect of short‐term exposure on health outcomes. The high correlation of industrial pollutants complicates the estimation of the impact of individual pollutants on health.
Timothy J. Halliday, John Lynham, Áureo de Paula   +2 more
wiley   +1 more source

Rapid Impact Crater Relaxation Caused by an Insulating Methane Clathrate Crust on Titan

The Planetary Science Journal
Titan’s impact craters are hundreds of meters shallower than expected, compared to similar-sized craters on Ganymede. Only 90 crater candidates have been identified, the majority of which have low certainty of an impact origin.
Lauren R. Schurmeier, Gwendolyn E. Brouwer, Jonathan P. Kay, Sarah A. Fagents, Angela G. Marusiak, Steven D. Vance   +5 more
doaj   +1 more source

Solvent‐Induced Surface Morphology Probed by NP‐SIMS

Surface and Interface Analysis, EarlyView.
ABSTRACT Surface morphology, that is, roughness and molecular arrangement, is known to have an impact on secondary ion mass spectra. The present study examines this issue using nanoprojectile secondary ion mass spectrometry (NP‐SIMS). NP‐SIMS involves bombarding the analyte with individual nanoparticles resolved in space and time and recording the ...
Pierre Hirchenhahn, Stanislav Verkhoturov, Michael Eller, Wilson Serem, Yordanos Bisrat, Emile A. Schweikert   +5 more
wiley   +1 more source

Simultaneous impact and lunar craters

, 1972
The existence of large terrestrial impact crater doublets and crater doublets that have been inferred to be impact craters on Mars suggests that simultaneous impact of two or more bodies can occur at nearly the same point on planetary surfaces.
Oberbeck, V. R.
core  

Linking Pulse‐Duration‐Controlled Laser Nanostructuring to Oxygen Evolution Kinetics in Fe‐enriched NiOx Electrodes

Small, EarlyView.
Pulse‐duration‐controlled ultra‐short laser processing is shown to directly create binder‐free Fe‐enriched NiOx electrodes with tunable porosity, active‐site density, and oxygen‐evolution kinetics. Shorter pulses generate defect‐rich nanostructures that accelerate charge transfer, promote highly active NiFeOOH formation, and deliver durable alkaline ...
Sandra Susan Koshy, Jyotisman Rath, Amirkianoosh Kiani   +2 more
wiley   +1 more source

Deep learning detects entire multiple-size lunar craters driven by elevation data and topographic knowledge

Geo-spatial Information Science
Lunar craters are important geomorphological features, that provide valuable insights into lunar morphology, geology, and impact processes. However, the current understanding of lunar craters of different sizes, especially smaller craters (diameter
Liyang Xiong, Yanxiang Wang, Haoyu Cao, Yingchao Ren, Sijin Li, Yang Chen, Guoan Tang   +6 more
doaj   +1 more source

Tailoring Laser Powder Bed Fusion and Post‐Processing Parameters for JIS SKD61 Tool Steels: Surface Roughness, Microstructure, and Mechanical Properties

steel research international, EarlyView.
Laser powder bed fusion of JIS SKD61 tool steel is systematically optimized using a Taguchi design and ANOVA. Hatch spacing and layer thickness are identified as dominant parameters controlling surface roughness and tensile strength. Subsequent tempering at 600°C improves microstructural stability and mechanical performance, enabling high‐density SKD61
Masrurotin Masrurotin, Andi Ard Maidhah, Maziar Ramezani, Wojciech Macek, Cho‐Pei Jiang   +4 more
wiley   +1 more source

Ring‐Mold Craters on Ceres: Evidence for Shallow Subsurface Water Ice Sources

Geophysical Research Letters, 2018
One of the main tasks of the Dawn mission is to characterize the potentially ice‐rich crust of the dwarf planet Ceres. Ongoing studies reveal morphological features related to ice‐rich material such as pits or particular landslides.
K. Krohn, A. Neesemann, R. Jaumann, K. A. Otto, K. Stephan, R. J. Wagner, F. Tosi, F. Zambon, O. Ruesch, D. A. Williams, C. A. Raymond, C. T. Russell   +11 more
doaj   +1 more source

Impact craters on Venus

, 1991
Compared with volcanism and tectonism, impact cratering on Venus has played an overall minor role in sculpting the present-day landscape. The study of Venus impact craters is vital to help place the chronology of the geologic features on the surface in ...
Schaber, G. G.
core