Results 181 to 190 of about 883,811 (388)
New York Academy of Sciences, February 1, 1897. Section of Astronomy and Physics [PDF]
, 1897 Wm. Hallock
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Software and Cyberinfrastructure for Astronomy VI
, 2021 J. Guzman, J. Ibsen
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Design of Waveguide NbN‐Based Superconductor–Insulator–Superconductor Mixer for 650 GHz
Advanced Photonics Research, EarlyView.This research work focuses on a waveguide NbN‐based superconductor–insulator–superconductor mixer operating at 650 GHz. The signal coupling circuit is designed using a waveguide‐microstrip coupling structure, and the return loss obtained is lower than −16 dB. For the mixing circuit, its return loss is less than −7.5 dB, and the return loss reduces with
Lianhao He, Fangting Lin, Xiaoyong He
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SECTION OF ASTRONOMY AND PHYSICS, OF THE NEW YORK ACADEMY OF SCIENCES, MAY 1, 1899 [PDF]
, 1899 Wm. S. Day
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Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens
Advanced Photonics Research, EarlyView.This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan +5 more
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NOTES ON THE PROGRESS OF ASTRONOMY DURING THE YEAR 1894 [PDF]
, 1895 J. K. Rees
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Advanced Photonics Research, EarlyView.This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu +5 more
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The Dawn of Astronomy: A Study of the Temple-Worship and Mythology of the Ancient Egyptians [PDF]
, 1894 Joseph Norman Lockyer
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Advanced Photonics Research, EarlyView.A compact self‐detecting dual‐comb spectroscopy (DCS) system based on dispersion‐engineered, high‐speed packaged quantum cascade lasers (QCLs) at λ≈4.6 μm under coherent injection locking is demonstrated. Broad multiheterodyne comb signal with reduced tooth linewidths by orders of magnitude is recorded.
Yu Ma +14 more
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Atmospheric Science Letters, Volume 24, Issue 1, January 2023., 2023 We report on a meeting on progress and challenges in convection‐permitting data assimilation. Novel developments include the assimilation of novel observations such as cloud‐affected satellite radiances, ground‐based profiling networks and aircraft data, as well as methodological advancements in error covariance modelling, and progress in operational ...
Guannan Hu +7 more
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