Results 91 to 100 of about 5,796,492 (306)

Astrometric Calibration of MagAO-X with Updated Solutions for HD 165054 Field Stars

open access: yesThe Astronomical Journal
MagAO-X is a recently commissioned extreme adaptive optics instrument for the Magellan Clay 6.5 m telescope at Las Campanas Observatory in Chile. MagAO-X had first light in 2019 and subsequent commissioning observations in 2022 and 2023.
Joseph D. Long   +15 more
doaj   +1 more source

Probing Electrocatalyst Design for Product Selectivity in CO2 Reduction

open access: yesAdvanced Science, EarlyView.
Selective CO2 electroreduction is controlled by catalyst structure, dynamic surface reconstruction, adsorbate interactions, and reaction microenvironment. This review summarizes Cu‐ and non‐Cu‐based catalysts, single‐atom and molecular systems, degradation pathways, and operando/computational strategies for steering CO2RR toward hydrocarbons ...
Suvodeep Sen   +5 more
wiley   +1 more source

РАЗВИТИЕ РАДИОАСТРОНОМИЧЕСКОГО ЦЕНТРА ДАННЫХ (RADC) НА ПРАО АКЦ ФИАН

open access: yesOdessa Astronomical Publications, 2011
The Radio Astronomy Data Center (RADC) are developed at PRAO ASC LPI in last some years. It consists from: a) the database of most important for radio astronomers astronomical catalogs; b) the database of observational data of Pushchino Radio Astronomy ...
В. А. Самодуров   +7 more
doaj   +1 more source

Multispectral UV Imaging on Capacitive CMOS Arrays Enabled by Solution‐Processed Metal‐Oxide Nanoparticles

open access: yesAdvanced Science, EarlyView.
Ultraviolet (UV) imagers are important for a variety of applications but often require dedicated semiconductor process flows. Here, a versatile capacitive CMOS platform is transformed into a visible‐blind, multispectral UV imager through post‐CMOS functionalization with solution‐processed metal‐oxide nanoparticles. The UV‐induced photodielectric effect
Suman Kundu   +5 more
wiley   +1 more source

A Formalism for Calibrating the Instrumental Polarization of Radio Interferometric Arrays at Meter Wavelengths Using Unpolarized Sky: A Demonstration Using MWA Observations

open access: yesThe Astrophysical Journal Supplement Series
Calibration of instrumental polarization is critical for measuring polarized radio emissions from astrophysical sources to extract the magnetic field information in astrophysical, heliospheric, and terrestrial plasmas.
Devojyoti Kansabanik   +4 more
doaj   +1 more source

Image processing of historical astronomical plates

open access: yes, 2020
© 2018 Astronomical Institute, Slovak Academy of Sciences. Many fields of X-ray astrophysics require multifrequency data including optical. Long-term data, such as provided by data archives, have special value.

core  

Historical astronomical data : urgent need for preservation, digitization enabling scientific exploration [PDF]

open access: yes, 2019
Over the past decades and even centuries, the astronomical community has accumulated a significant heritage of recorded observations of a great many astronomical objects.
Webb, David   +18 more
core   +1 more source

Scalable Crackle‐Lithography for Multifunctional Enclosed Plastic Nanofluidic Devices

open access: yesAdvanced Science, EarlyView.
Crackle‐lithography enables scalable fabrication of enclosed plastic‐substrate‐based nanofluidic devices with interconnected nanochannels that enable molecular transport, optical interrogation, confined electroless copper deposition, and ionic memristive behavior.
Tirumala Rao Dumpala   +8 more
wiley   +1 more source

Astronomical sketching a step-by-step introduction

open access: yes, 2007
At some time we have all gazed through the telescope eyepiece at the magnificent rings and banded globe of Saturn, or seen long shadows reaching across crater floors at the Moon’s terminator – and wondered at the sheer beauty of the sight.
Handy, Richard   +4 more
core   +1 more source

Symmetry‐Imposed Selection Rules for Excitations of Nontrivial Plasmonic Topologies

open access: yesAdvanced Science, EarlyView.
A unified group‐theory selection rule governs the excitation of vectorial nearfield topologies across three plasmonic spin states. Derived from first principles, it predicts spin–orbit vortex splitting and multidimensional nested vortices, confirmed by phase‐resolved in situ measurements.
Jie Yang   +14 more
wiley   +1 more source

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