Results 11 to 20 of about 305,009 (232)

Methods for Complexing Images Formed by Multi-Band Synthetic Aperture Radars

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2021
Introduction. Synthetic aperture radars (SAR) are important components of aviation-based systems for remote sensing of the Earth. The current level of such systems allows simultaneous radar surveys in several frequency ranges.
A. A. Potapov   +2 more
doaj   +1 more source

Reconstructing daily snow and ice albedo series for Greenland by coupling spatiotemporal and physics-informed models

open access: yesInternational Journal of Applied Earth Observations and Geoinformation, 2023
Snow and ice albedo is a critical geographical indicator that reflects climate change on Earth. Quantifying the albedo in Greenland ice sheet, which is extensively covered with snow and ice, is key to studying changes in the energy budget in the Northern
Fan Ye   +6 more
doaj   +1 more source

Element sets for high-order Poincar\'e mapping of perturbed Keplerian motion [PDF]

open access: yes, 2018
The propagation and Poincar\'e mapping of perturbed Keplerian motion is a key topic in celestial mechanics and astrodynamics, e.g. to study the stability of orbits or design bounded relative trajectories. The high-order transfer map (HOTM) method enables
Armellin, Roberto, Gondelach, David J.
core   +2 more sources

Dropping cold quantum gases on Earth over long times and large distances [PDF]

open access: yes, 2006
We describe the non-relativistic time evolution of an ultra-cold degenerate quantum gas (bosons/fermions) falling in Earth's gravity during long times (10 sec) and over large distances (100 m).
A. Abrikosov   +19 more
core   +1 more source

Water Quality Carbon Nanotube-Based Sensors Technological Barriers and Late Research Trends: A Bibliometric Analysis

open access: yesChemosensors, 2022
Water is the key element that defines and individualizes our planet. Relative to body weight, water represents 70% or more for the majority of all species on Earth. Taking care of water as a whole is equivalent with taking care of the entire biodiversity
Ana-Maria Nasture   +4 more
doaj   +1 more source

An optimal design of the broadcast ephemeris for LEO navigation augmentation systems

open access: yesGeo-spatial Information Science, 2022
As the deployment of large Low Earth Orbiters (LEO) communication constellations, navigation from the LEO satellites becomes an emerging opportunity to enhance the existing satellite navigation systems.
Xueli Guo   +5 more
doaj   +1 more source

Sappo: Sulapa Eppa Walasuji as the Ideas of Creation Three Dimensional Painting

open access: yesDewa Ruci: Jurnal Pengkajian dan Penciptaan Seni, 2021
Lontara is a traditional script of the Bugis-Makassar community, derived from the word lontar, a type of plant in South Sulawesi, which is still used and maintained. Sappo (Bugis): fence used to limit (surround, insulate) land and houses.
Hasbi Hasbi
doaj   +1 more source

Magnetization reversals in core–shell sphere clusters: finite-element micromagnetic simulation and machine learning analysis

open access: yesScientific Reports, 2023
Recently developed permanent magnets, featuring specially engineered microstructures of inhomogeneous magnetic phases, are being considered as cost-effective alternatives to homogeneous single-main-phase hard magnets composed of Nd2Fe14B, without ...
Hyeon-Kyu Park, Sang-Koog Kim
doaj   +1 more source

Etica ed estetica in architettura

open access: yesRivista di Estetica, 2015
The essay aims to show the irreducible articulation between ethics and aesthetics as the condition of the architectural experience, of its production as well as its fruition. For this reason it is necessary to deconstruct the classical tradition to which
Chris Younès
doaj   +1 more source

Size and Composition of the MORB+OIB Mantle Reservoir

open access: yesGeochemistry, Geophysics, Geosystems, 2022
Most efforts to characterize the size and composition of the mantle that complements the continental crust have assumed that the mid‐ocean ridge basalt (MORB) source is the incompatible‐element depleted residue of continental crust extraction. The use of
A. W. Hofmann, C. Class, S. L. Goldstein
doaj   +1 more source

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