Results 81 to 90 of about 74,044 (308)

GPU-based acceleration of radio interferometry point source visibility simulations in the MeqTrees framework [PDF]

, 2013
Modern radio interferometer arrays are powerful tools for obtaining high resolution images of low frequency electromagnetic radiation signals in deep space.
Baxter, Richard, Baxter, Richard Jonathan   +1 more
core  

Cosmic downsizing of powerful radio galaxies to low radio luminosities

, 2015
E.E.R. acknowledges financial support from NWO (grant number: NWO-TOP LOFAR 614.001.006). E.E.R. and J.A. thank the Leiden/ESA astrophysics program for summer students (LEAPS) which supported J.A. in Leiden.Aims. At bright radio powers (P1.4 GHz > 1025 W/
Best, P., E. E. Rigby, H. J. A. Röttgering, Röttgering, H., Rigby, E., Rosario, D., D. Rosario, Rigby, E.E., Argyle, J., P. N. Best, Best, P.N., Röttgering, H.J.A., Argyle, Joshua, J. Argyle   +13 more
core   +1 more source

Low frequency astronomy - the challenge in a crowded RFI environment [PDF]

, 2011
Low frequency radio astronomy is a hot topic at the moment. Many large arrays of antennas are built to facilitate the astronomical research on low frequencies.
Albert-Jan Boonstra, Boonstra, Albert Jan, Mark J. Bentum, Bentum, Marinus Jan   +3 more
core   +1 more source

Study of Free‐Space Optical Quantum Network: Review and Prospectives

Advanced Science, EarlyView.
Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley   +1 more source

Biomimetic Polymerization of Tellurocysteine: Breaking the Natural Amino Acid Radioprotection Limitation

Advanced Science, EarlyView.
Inspired by natural amino acid polymer‐melanin systems, this study strategically incorporated tellurocysteine to develop advanced radiation‐shielding materials. This approach transformed the primary interaction mechanism between melanin‐based materials and incident photons from Compton scattering to the photoelectric effect. Tellurocysteine‐polymerized
Wei Chen, Hanjie Zhu, Yue Zhang, Yuqing Qiao, Ruotong Deng, Huaping Xu, Wei Cao   +6 more
wiley   +1 more source

Low Frequency Radio Astronomy from Above the Ionosphere [PDF]

Symposium - International Astronomical Union, 2002
The GMRT represents a dramatic improvement in ground-based observing capabilities for low frequency radio astronomy. At sufficiently low frequencies, however, no ground-based facility will be able to produce high resolution images while looking through the ionosphere.
openaire   +1 more source

Electrostatic Self‐Assembly Induced Nest‐Like MXene Networks on Fabric for Ultra‐Broadband Flexible Absorption

Advanced Science, EarlyView.
In this study, an electrostatically self‐assembled WPU‐MXene@FC flexible fabric constructs a “nest‐like” structure on fibers, building construct MXene multiple loss paths, achieving ultra‐wideband absorption of 25.3–1200 GHz in a thickness of 1.8 mm, while also exhibiting superhydrophobicity, acid and alkali resistance, and bending resistance ...
Min Luo, Zihao Chen, Haotian Li, Kexun Li, Wei Wang, Weishi Jiao, Donghong Wang, Qiye Wen   +7 more
wiley   +1 more source

A FAST Survey of H I Absorption in Low-power Radio Sources

The Astrophysical Journal
We conducted a H i 21 cm absorption study of a sample of 147 nearby ( z < 0.1) low-power radio sources with 10 mJy < S _1.4 GHz < 30 mJy and $\mathrm{log}({P}_{1.4\,{\rm{GHz}}}/{\rm{W}}\,{{\rm{Hz}}}^{-1})=20.5\,\unicode{x02013}\,23.7$ , using the Five ...
Yang Su, Qingzheng Yu, Taotao Fang, Junfeng Wang, Jianfeng Wu, Bo Zhang   +5 more
doaj   +1 more source

Memristive Physical Reservoir Computing

Advanced Science, EarlyView.
Memristors’ nonlinear dynamics and input‐dependent memory effects make them ideal candidates for high‐performance physical reservoir computing (RC). Based on their conductance modulation, memristors can be classified as electronic or optoelectronic types.
Dian Jiao, Ziyuan Wang, Jingrui Wang, Li Zhang, Xianhua Wei, Lingxiang Hu, Zongxiao Li, Athanasios V. Vasilakos, Zhizhen Ye, Fei Zhuge   +9 more
wiley   +1 more source

Helical Electron Beam Micro‐Bunching by High‐Order Modes in a Micro‐Plasma Waveguide

Advanced Science, EarlyView.
ABSTRACT Electron acceleration by a high‐power Laguerre‐Gaussian pulse in a micro‐plasma waveguide is investigated. When the incident laser travels in the waveguide, electrons on the wall are extracted into the vacuum core and accelerated by the longitudinal field of the waveguide mode.
Xingju Guo, Longqing Yi
wiley   +1 more source