Results 81 to 90 of about 3,036 (288)

Radiation-induced Degradation and On-orbit Performance Assessment of an sCMOS Detector

The Astronomical Journal
Optical astronomical projects have traditionally relied on charge-coupled device (CCD) detectors. However, next-generation complementary metal-oxide-semiconductor (CMOS) technology, with advantages including high-speed readout, low dark current, and ...
Qi Feng, Ziyi Liu, Hongfei Zhang, Jian Wang, Jian Ge, Xinyu Yao, Hongjing Yang, Weicheng Zang, Zitao Zhao, Mingzhu Xun, Baolong Chen, Kangzhe Wang, Xinbo Wang   +12 more
doaj   +1 more source

BGRem: A background noise remover for astronomical images based on a diffusion model

Astronomy & Astrophysics
Context. Astronomical imaging aims to maximize signal capture while minimizing noise. It is difficult and expensive to enhance the signal-to-noise ratio directly on detectors, which has led to extensive research into advanced post-processing techniques ...
Nicolaas Rodney, Caron Sascha, Stoppa Fiorenzo, Bhattacharyya Saptashwa, de Austri Roberto R., Groot Paul J., Levan Andrew J.   +6 more
doaj   +1 more source

An Ultra‐Reliable and Highly Sensitive Flexible Piezoelectric Pressure Sensor Based on Vertically Aligned Gallium Nitride Microrod Arrays on Graphene

Advanced Materials Interfaces, EarlyView.
A flexible and highly reliable piezoelectric pressure sensor based on GaN p–n homojunction microrod arrays on graphene is demonstrated. The sensor exhibits high sensitivity, rapid response, excellent cyclic durability, and stable performance after thermal aging and PBS immersion, highlighting its potential for harsh‐environment and biomedical pressure ...
Asad Ali, Han Ik Kim, Seokje Lee, Imhwan Kim, Hongseok Oh, Gyu‐Chul Yi   +5 more
wiley   +1 more source

Astronomical observatory for shuttle. Phase A study [PDF]

, 1973
The design, development, and configuration of the astronomical observatory for shuttle are discussed. The characteristics of the one meter telescope in the spaceborne observatory are described.
Guthals, D. L.
core   +1 more source

Surfactants as a Tool for Coupling Light Into Hydrodynamic Flow: The Influence of Surfactant Hydrophobicity and Head Polarity

Advanced Materials Interfaces, EarlyView.
Reversible light‐induced gradients at solid–liquid interfaces enable controllable interfacial transport via light‐driven diffusioosmosis. We demonstrate directed particle manipulation based on dynamically generated concentration gradients. The mechanism is broadly applicable to cationic, anionic, and non‐ionic surfactants with varying hydrophobicity ...
Maren Umlandt, David Feldmann, Nino Lomadze, Svetlana Santer   +3 more
wiley   +1 more source

Detecting fluorescent dark matter with X-ray lasers

European Physical Journal C: Particles and Fields, 2018
Fluorescent dark matter has been suggested as a possible explanation of both the 3.5 keV excess in the diffuse emission of the Perseus Cluster and of the deficit at the same energy in the central active galaxy within that cluster, NGC 1275.
Francesca Day, Malcolm Fairbairn
doaj   +1 more source

The Influence of Mesoscale Particle Structure on the Electrode Degradation and Resultant Electrochemistry of Lithium Ion Cells With Nickel Rich Lithium Nickel Manganese Cobalt Oxide Positive Electrodes

Advanced Materials Technologies, EarlyView.
Milled polycrystalline NMC811 cathode (MPC NMC) with smaller secondary particle and higher surface area had 1) greater cathode tortuosity, 2) reduced surface Ni on the cycled MPC cathodes consistent with surface reconstruction, and 3) increased Ni deposition from cathode‐anode crosstalk, manifesting in lower functional capacity and higher impedance ...
Edelmy J. Marin Bernardez, Andrew Nicoll, David J. Arnot, Armando Rodriguez Campos, Patrick J. Barry, Marie F. Millares, Cynthia Huang, Melissa A. Guercio, Grace K. Dono, Alexis Pace, Xianghui Xiao, Cherno Jaye, Conan Weiland, Jianming Bai, Hui Zhong, Michael Drakopoulos, Zhong Zhong, Nghia T. Vo, Xiao Tong, Esther S. Takeuchi, Amy C. Marschilok, Shan Yan, Kenneth J. Takeuchi   +22 more
wiley   +1 more source

Curved detectors developments and characterization: application to astronomical instruments [PDF]

, 2019
Many astronomical optical systems have the disadvantage of generating curved focal planes requiring flattening optical elements to project the corrected image on flat detectors. The use of these designs in combination with a classical flat sensor implies
Jahn, Wilfried, Gaschet, Christophe, Ferrari, Marc, Lombardo, Simona, Behaghel, Thibault, Chambion, Bertrand, Henry, David, Caplet, Stéphane, Muslimov, Eduard, Hugot, Emmanuel, Roulet, Melanie   +10 more
core  

Tantalum superconducting tunnel junctions for photon counting detectors [PDF]

, 2002
This paper presents the fabrication of Ta Superconducting Tunnel Junction detector working at 0.2 K to be used for photon counting instruments in astronomical applications.
C. Jorel, P. Feautrier, J.-C. Villégier, A. Benoit   +3 more
core   +1 more source

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source