Results 81 to 90 of about 183,322 (313)

An Analysis of Embedding Impedance for Q-Band Waveguide Gunn Oscillator With Resonance Post [PDF]

Journal of Astronomy and Space Sciences, 2001
The oscillation frequency tuning range of waveguide Gunn oscillator and its stability depend sensitively on the dimensions of the resonator. Therefore the embedding impedances with the various dimensions of the resonator for Q-band (33~50 GHz) Gunn ...
Hyungjoo Kim, Seogtae Han, Taiseong Kim, Kwangdong Kim, Changhoon Lee, Moonhee Chung, Yonggi Kim   +6 more
doaj  

THE STUDY OF EXTRAGALACTIC SOURCES 3C 446 AND 3C 345 WITH USING THE SINGULAR SPECTRUM AND WAVELET ANALYSIS

Odessa Astronomical Publications, 2016
We investigated the data of monitoring of flux density of extragalactic sources 3С446 and 3C345, which was held on 26-meter radio telescope of University of Michigan at frequencies 14.5, 8 and 4.8 GHz.
G. I. Donskykh, M. I. Ryabov, A. L. Sukharev, M. F. Aller   +3 more
doaj   +1 more source

Wilbur Norman Christiansen 1913-2007

, 2011
W. N. ('Chris') Christiansen was an innovative and influential radio astronomy pioneer. The hallmarks of his long and distinguished career in science and engineering, spanning almost five decades, were his inventiveness and his commitment to, and success
Frater, R. H., Goss, W. M.
core   +1 more source

Transient Terahertz Oscillations During Photoinduced Polarization Topology Reconfiguration in Ferroelectric Superlattices

Advanced Science, EarlyView.
Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan, Hyeon Jun Lee, Xiangwei Guo, Youngjun Ahn, Samuel D. Marks, Mohammed H. Yusuf, Matthew Dawber, James M. Glownia, Diling Zhu, Takahiro Sato, Sanghoon Song, Haidan Wen, Jia‐Mian Hu, Paul G. Evans   +13 more
wiley   +1 more source

DECAMETER PULSARS AND TRANSIENTS SURVEY OF THE NORTHERN SKY. STATUS, FIRST RESULTS, MULTIPARAMETRIC PIPELINE FOR CANDIDATE SELECTION

Odessa Astronomical Publications, 2016
We present the results of processing first 20% of Northern sky pulsars and transients survey using UTR-2 radio telescope. Data processing is done by an automatic pipeline that detects and outputs a large number of transient candidates (usually dispersed ...
V. V. Zakharenko, I. P. Kravtsov, I. Y. Vasylieva, S. S. Mykhailova, O. M. Ulyanov, A. I. Shevtsova, A. O. Skoryk, P. Zarka, O. O. Konovalenko   +8 more
doaj   +1 more source

MASER: A Science Ready Toolbox for Low Frequency Radio Astronomy

Data Science Journal, 2020
MASER (Measurements, Analysis, and Simulation of Emission in the Radio range) is a comprehensive infrastructure dedicated to time-dependent low frequency radio astronomy (up to about 50 MHz). The main radio sources observed in this spectral range are the
Baptiste Cecconi, Alan Loh, Pierre Le Sidaner, Renaud Savalle, Xavier Bonnin, Quynh Nhu Nguyen, Sonny Lion, Albert Shih, Stéphane Aicardi, Philippe Zarka, Corentin Louis, Andrée Coffre, Laurent Lamy, Laurent Denis, Jean-Mathias Grießmeier, Jeremy Faden, Chris Piker, Nicolas André, Vincent Génot, Stéphane Erard, Joseph N. Mafi, Todd A. King, Jim Sky, Markus Demleitner   +23 more
doaj   +1 more source

Commensal observing with the Allen Telescope array: software command and control

, 2010
The Allen Telescope Array (ATA) is a Large-Number-Small-Diameter radio telescope array currently with 42 individual antennas and 5 independent back-end science systems (2 imaging FX correlators and 3 time domain beam formers) located at the Hat Creek ...
Ackermann, Robert, Barott, William C., Gutierrez-Kraybill, Colby, Harp, Gerald, Keating, Garrett K., Kilsdonk, Tom, MacMahon, David, Richards, Jon, Williams, Peter K. G.   +8 more
core   +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

Full-Stokes, Multi-Frequency Radio Polarimetry of Fermi Blazars; Monitoring and Modelling

Galaxies, 2017
The polarised emission from active galactic nuclei (AGN) jets carries information about the physical conditions at the emitting plasma elements, while its temporal evolution probes the physical processes that introduce variability and dynamically modify ...
Emmanouil Angelakis, Ioannis Myserlis, J. Anton Zensus   +2 more
doaj   +1 more source

The Cavendish Computors: The women working in scientific computing for Radio Astronomy

, 2022
Verity Allan
openalex   +1 more source