Results 311 to 320 of about 7,834,879 (370)

Lateglacial and Holocene glacier variations in an active volcanic area, northern Jan Mayen (Nord‐Jan), Norway

Boreas, Volume 54, Issue 3, Page 305-327, July 2025.
Glacier evolution and environmental changes in the northern Jan‐Mayen from the early deglaciation and well into the Holocene are discussed. Results are based on a large chronological dataset (TCN and radiocarbon dates), integrated with field data on glacial landforms and sediments, including the use of GPR.
Astrid Lyså, Eiliv A. Larsen, Johanna Anjar, Naki Akçar, Asbjørn Hiksdal, Georgios Tassis   +5 more
wiley   +1 more source

Sampling Mars: Geologic context and preliminary characterization of samples collected by the NASA Mars 2020 Perseverance Rover Mission. [PDF]

Proc Natl Acad Sci U S A
Herd CDK, Bosak T, Hausrath EM, Hickman-Lewis K, Mayhew LE, Shuster DL, Siljeström S, Simon JI, Weiss BP, Wadhwa M, Zorzano MP, Maki JN, Farley KA, Stack KM.   +13 more
europepmc   +1 more source

Erbium aluminum perovskite ceramics with superior plasma etching resistance

Journal of the American Ceramic Society, Volume 108, Issue 7, July 2025.
Abstract In semiconductor industry, the ongoing miniaturization of the integrated functions on silicon wafers requires the application of harsher plasma compositions during dry etching. At the same time the requirements for cleanliness and wafer‐to‐wafer reproducibility increase.
Christian Stern, Doris Sebold, Yoo Jung Sohn, Martin Bram, Olivier Guillon   +4 more
wiley   +1 more source

Perspectives on Mars Sample Return: A critical resource for planetary science and exploration. [PDF]

Proc Natl Acad Sci U S A
McSween HY, Hamilton VE, Farley KA.
europepmc   +1 more source

Prorocentrum insidiosum sp. nov. (Prorocentrales, Dinophyceae): Morphological and Phylogenetic Characterization of a Mucosphere Producing Dinoflagellate From the “cordatum Group”

Journal of Eukaryotic Microbiology, Volume 72, Issue 4, July/August 2025.
ABSTRACT Prorocentrum cf. balticum was the provisional designation assigned to strains of a small, pelagic, mixoplanktonic dinoflagellate found to produce carbon‐rich mucilage‐based prey capture devices, termed “mucospheres.” Here we characterize the morphology and phylogeny of the strains, describe them as Prorocentrum insidiosum sp. nov., and discuss
Michaela E. Larsson, Gustaaf Hallegraeff, Martina A. Doblin, Urban Tillmann   +3 more
wiley   +1 more source

Fundamental constraints and questions from the study of martian meteorites and the need for returned samples. [PDF]

Proc Natl Acad Sci U S A
Udry A, Ostwald AM, Day JMD, Hallis LJ.
europepmc   +1 more source

Potential and constraints of uncrewed aerial vehicle orthoimagery for rivers: A direct comparison with field measurements for mapping boulders

Earth Surface Processes and Landforms, Volume 50, Issue 8, 30 June 2025.
Both field and drone surveys are commonly used to map river landforms. Comparing the two, we found that drones consistently underestimated boulder density and coverage by 30%, with the difference best explained by water depth. Abstract Technological advances continue to improve our ability to detect landforms and landscape changes.
Christopher Wård, Richard J. Mason, Ricardo Carrillo, Lina E. Polvi   +3 more
wiley   +1 more source

An unresolved SPH-DEM model for simulation of ductile and brittle surface erosion by abrasive water-jet (AWJ) impact. [PDF]

Sci Rep
Yu R, Hao G, Yang W, Li Z.
europepmc   +1 more source

Stratigraphic Evidence of Backwater Morphodynamics and Lowland River Deltas in the Northern Hemisphere of Mars

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract Backwater morphodynamics describe feedbacks between hydraulics and sedimentation in fluvio‐deltaic systems in the coastal backwater zone. On Earth, normalized channel belt width decreases approaching the coastline and drops sharply at the start of the backwater zone.
C. M. Hughes, J. B. Shaw, A. M. Fernandes, T. E. Swanson   +3 more
wiley   +1 more source

Simulation and Experimental Study of the Single-Pulse Femtosecond Laser Ablation Morphology of GaN Films. [PDF]

Micromachines (Basel)
Wang M, Zhang T, Yuan Y, Wang Z, Liu Y, Chen L.   +5 more
europepmc   +1 more source