Results 81 to 90 of about 308,807 (294)

Astronomy for development

open access: yesAstronomy & Geophysics, 2020
Abstract Hannah Dalgleish examines ways in which astronomy can help to forge a sustainable future for life on Earth.
openaire   +2 more sources

Open-Loop Wavefront Reconstruction with Pyramidal Sensors Using Convolutional Neural Networks

open access: yesMathematics
Neural networks have significantly advanced adaptive optics systems for telescopes in recent years. Future adaptive optics systems, especially for extremely large telescopes, are expected to predominantly employ pyramid wavefront sensors, which offer ...
Saúl Pérez-Fernández   +7 more
doaj   +1 more source

Chiral Phonon–Driven Ultrafast Spin Currents in a Non‐Magnetic Ferroelectric

open access: yesAdvanced Materials, EarlyView.
Broadband terahertz emission spectroscopy shows signatures of ultrafast spin‐current generation in non‐magnetic ferroelectric β$\beta$’‐In2Se3${\rm In}_2{\rm Se}_3$. Reversal of the emitted field upon sample inversion and substitution of Pt with W indicates spin‐Hall‐mediated charge conversion, while polarization‐resolved measurements reveal ...
Thomas B. Gill   +16 more
wiley   +1 more source

Computing and the Internet (The Real Astronomy)

open access: yes, 2008
Professional Astronomers talk about how modern computing and the Internet have changed the way astronomy is conducted.
Centre for Astrophysics and Supercomputing
core   +1 more source

Regards sur la nature : place de l’observation dans les textes astronomiques latins

open access: yesPallas, 2013
In antiquity, astronomical knowledge came essentially from philosophy, mathematics and logic. One can then question the role given to the observation of phenomena. To answer this question, we chose to analyze some of the demonstrations presented in Latin
Émilie-Jade Poliquin
doaj   +1 more source

Wafer‐Scale Direct Growth of Ultraclean Monolayer Amorphous Carbon on c‐Sapphire by Remote Catalytic Dehydrogenation

open access: yesAdvanced Materials, EarlyView.
Remote catalytic dehydrogenation enables the direct growth of monolayer amorphous carbon on a 2‐inch sapphire wafer by thermal CVD. Spatial separation of the catalyst from the growth substrate eliminates metallic residue and post‐growth processing, yielding a wafer‐scale uniform film with a random polygonal sp2‐hybridized carbon network that exhibits ...
Muhammad Sabbtain Abbas   +8 more
wiley   +1 more source

Research on teaching astronomy in the planetarium

open access: yes, 2017
From a noted specialist in astronomy education and outreach, this Brief provides an overview of the most influential discipline-based science education research literature now guiding contemporary astronomy teaching.
Tatge, Coty B   +5 more
core   +1 more source

A Brief Review of Unsupervised Machine Learning Algorithms in Astronomy: Dimensionality Reduction and Clustering

open access: yesUniverse
This review investigates the application of unsupervised machine learning algorithms to astronomical data. Unsupervised machine learning enables researchers to analyze large, high-dimensional, and unlabeled datasets and is sometimes considered more ...
Chih-Ting Kuo, Duo Xu, Rachel Friesen
doaj   +1 more source

Photocatalytic Water Splitting on the Lunar Surface: Prospects for In Situ Resource Utilization

open access: yesAdvanced Materials Interfaces, EarlyView.
Water has been found in craters on the moon nearby locations which are illuminated >80% of the time. Photocatalysis uses energy from sunlight to drive chemical reactions such as water splitting to produce oxygen and hydrogen. It is a scalable technology that requires lighter equipment and utilizes resources available on the moon. ABSTRACT The discovery
Ranjani Kalyan   +6 more
wiley   +1 more source

Exploitation and Apocalypse: Imagined Futures of Space Colonization

open access: yesCaliban: French Journal of English Studies
As private ventures into near-Earth orbit increase in frequency and take a more active role in facilitating scientific research, eyes turn to the Moon and Mars as possible destinations for humanity to establish a permanent presence.
Matt Harvey
doaj   +1 more source

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