Results 51 to 60 of about 9,521 (349)

The use of liquid crystal adaptive optics devices in astronomy [PDF]

open access: yes, 1991
Images obtained from large astronomical telescopes are distorted and blurred by the effects of the atmosphere. In order to compensate for this, an adaptive optics system can be incorporated downstream from the telescope focus.
Love, G.D, Love, Gordon D.
core  

Room‐Temperature Skyrmionic Synapse in 2D Ferromagnet Fe3GaTe2 Operating via Collective Spin Texture Transformation

open access: yesAdvanced Materials, EarlyView.
We demonstrate a neuromorphic synapse in 2D Fe3GaTe2 flakes. The device operates via a current‐driven transformation from a skyrmion‐lattice to a stripe‐domain state, yielding a linear anomalous Hall resistance response with a tunable slope to enable multiply‐accumulate operations. Simulations confirm its viability in artificial neural networks.
Jixiang Huang   +20 more
wiley   +1 more source

Stars over St Andrews : 75 years of observational astronomy at the University Observatory, St Andrews, Scotland [PDF]

open access: yes, 2016
This document (© Ron Hilditch, University Observatory, St Andrews, Scotland) gives an account of the observational astronomy conducted at the University Observatory, St Andrews, from its inauguration in 1940 through to the present day, some 75 years ...
Hilditch, R. W.
core  

I. S. SHKLOVSKY AND LOW-FREQUENCY RADIO ASTRONOMY

open access: yesRadio Physics and Radio Astronomy, 2017
Purpose: Proving of the high astrophysical significance of the low-frequency radio astronomy (decameter and adjacent hectometer and meter wavelengths), demonstration of the priority results of the Ukrainian low-frequency radio astronomy as well as ...
A. A. Konovalenko
doaj   +1 more source

Optimal Control Drives Ultrafast and Energy‐Efficient Magnetization Switching in Van der Waals Magnets

open access: yesAdvanced Materials, EarlyView.
ABSTRACT The accelerating expansion of data‐centric technologies is sharply increasing the energy burden of information storage, placing unprecedented pressure on the efficiency of magnetic switching. Conventional field‐driven reversal, once the foundation of magnetic memory, has become impractical in modern architectures due to its high energy cost ...
Mohammad H. Badarneh   +2 more
wiley   +1 more source

Astronomy with Small Telescopes [PDF]

open access: yes, 2015
We have designed and built three cost effective observatories, in distinct models, which can house Schmidt – Cassegrain type small telescopes having aperture sizes up to 16 inches.
Meitei, Ablu   +3 more
core   +1 more source

Uncovering the Hidden Physical Structures and Protostellar Activities in the Low-metallicity S284-RE Region: Results from ALMA and JWST

open access: yesThe Astrophysical Journal
We present an observational study of the S284-RE region, a low-metallicity area associated with the extended S284 H ii region. A thermally supercritical filament (mass ∼2402 M _⊙ and length ∼8.5 pc) is investigated using the Herschel column density map ...
O. R. Jadhav   +6 more
doaj   +1 more source

When Poor Exciton Dissociation Limits Photocurrents in Organic Solar Cells: Why Low Offset Non‐Fullerene Acceptor Blends Can't Be Efficient

open access: yesAdvanced Materials, EarlyView.
The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
wiley   +1 more source

Development Of Astronomy Education In India [PDF]

open access: yes, 1997
Education in astronomy starts early in India. Science texts at prim.my, middle and secondary levels have units on astronomy. However, these units are generally skipped because the schools lack appropriate manpower and material.
Bhatia, V. B.
core  

Tutorial guide to X-ray and gamma-ray astronomy: data reduction and analysis [PDF]

open access: yes, 2020
This book provides a comprehensive introduction to X-ray and gamma-ray astronomy. The first part discusses the basic theoretical and observational topics related to black hole astrophysics; the optics and the detectors employed in X-ray and gamma-ray ...
Bambi, Cosimo
core   +1 more source

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