Results 101 to 110 of about 5,111 (331)

Active optics in astronomy – modeling of deformable substrates: freeform surfaces for FIREBall and MESSIER

Journal of the Mechanical Behavior of Materials, 2018
Active optics techniques on large telescopes and astronomical instrumentations provide high imaging quality. For ground-based astronomy, the co-addition of adaptive optics again increases angular resolution up to providing diffraction-limited imaging at ...
Lemaitre Gérard Rene
doaj   +1 more source

Convolutional Neural Networks Approach for Solar Reconstruction in SCAO Configurations

Sensors, 2019
Correcting atmospheric turbulence effects in light with Adaptive Optics is necessary, since it produces aberrations in the wavefront of astronomical objects observed with telescopes from Earth.
Sergio Luis Suárez Gómez, Carlos González-Gutiérrez, Francisco García Riesgo, Maria Luisa Sánchez Rodríguez, Francisco Javier Iglesias Rodríguez, Jesús Daniel Santos   +5 more
doaj   +1 more source

In Situ Pseudo‐Halide Diffusion Enables Buried Interface Regulation and Crystallinity Enhancement in Perovskite Solar Cells

Advanced Science, EarlyView.
Thermally activated LiHCOO induces in situ pseudo‐halide diffusion, promoting buried interface strain release and perovskite crystallization. The monoclinic LiHCOO phase forms an open framework structure that enhances HCOO− diffusion and drives interfacial restructuring.
Chao Gao, Li He, Changjiang Li, Long Fang, Wenzhong Shen   +4 more
wiley   +1 more source

Kirkpatrick Baez X-ray optics for astrophysics: Recent status [PDF]

, 2018
© 2018 Astronomical Institute, Slovak Academy of Sciences. X-ray optics in Kirkpatrick Baez arrangement represent promising alternative to Wolter optics in common use.

core  

Geometric optics: theory and design of astronomical optical systems using Mathematica [PDF]

, 2016
This text, now in its second edition, presents the mathematical background needed to design many optical combinations that are used in astronomical telescopes and cameras.
Cavaliere, Roberto, Romano, Antonio
core   +1 more source

Unconventional Hysteretic Charge Filling in Moiré‐Reconstructed Helical Trilayer Graphene

Advanced Science, EarlyView.
In helical trilayer graphene, sequential twisting reconstructs the moiré landscape into periodic domains separated by aperiodic boundaries. Longitudinal transport reveals sweep‐direction‐dependent hysteresis, while the Hall response traces this behavior to hysteretic charge filling at the aperiodic boundaries.
Hangyeol Park, Junhyeok Oh, Rasoul Ghadimi, Chiranjit Mondal, Yungi Jeong, Won Beom Choi, Kenji Watanabe, Takashi Taniguchi, Bohm‐Jung Yang, Joonho Jang   +9 more
wiley   +1 more source

Machine‐Learning‐Enhanced Printed Vertical Magnetoresistive Sensors for Transparent, Flexible, Multimodal Interactive Magnetoelectronics

Advanced Science, EarlyView.
This study presents printed magnetoresistive sensors with a vertically aligned architecture that enables high optical transparency and mechanical flexibility. By integrating deep learning for the analysis of complex spatiotemporal signal patterns, the system further achieves intelligent multimodal interaction capabilities.
Rui Xu, Guannan Mu, Oleksandr V. Pylypovskyi, Qihao Zhang, Rico Illing, René Hübner, Ran He, Andreas Knüpfer, Sebastian Lehmann, Olha Bezsmertna, Kornelius Nielsch, Denys Makarov   +11 more
wiley   +1 more source

High-efficiency Autonomous Laser Adaptive Optics [PDF]

, 2014
As new large-scale astronomical surveys greatly increase the number of objects targeted and discoveries made, the requirement for efficient follow-up observations is crucial.
Bui, Khanh, Riddle, Reed, Das, Hillol, Chordia, Pravin, Hogstrom, Kristina, Dekany, Richard, Law, Nicholas M., Punnadi, Sujit, Baranec, Christoph, Ramaprakash, A. N., Kulkarni, Shrinivas, Tendulkar, Shriharsh, Burse, Mahesh   +12 more
core   +1 more source

Integrated Optics in Astronomical Interferometry [PDF]

Symposium - International Astronomical Union, 1994
Integrated optical components (mostly single-mode fibers and couplers) can be used to achieve several functions that are needed in interferometry: coherent beam transportation and recombination, pathlength modulation and control for fringe tracking and double Fourier interferometry, spatial filtering of the wavefront and interferogram calibration ...
openaire   +1 more source

Direct Observation of Vortex Liquid Droplets in the Iron Pnictide Superconductor CaKFe4As4 at 0.5Tc

Advanced Science, EarlyView.
Vortex matter in the iron‐based superconductor CaKFe4As4${\rm CaKFe}_4{\rm As}_4$ is visualized at the nanoscale, revealing the unexpected emergence of vortex‐liquid droplets far below the critical temperature. These localized fluctuating regions coexist with a vortex solid, demonstrating that dissipation‐related dynamics arise well before macroscopic ...
Óscar Bou Marqués, Jose A. Moreno, Pablo García Talavera, Mingyu Xu, Juan Schmidt, Sergey L. Bud'ko, Paul C. Canfield, Isabel Guillamón, Edwin Herrera, Hermann Suderow   +9 more
wiley   +1 more source