Results 121 to 130 of about 1,091,526 (300)

Anisotropy of the space orientation of radio sources. I: The catalog

, 2009
A catalog of the extended extragalactic radio sources consisting of 10461 objects is compiled based on the list of radio sources of the FIRST survey. A total of 1801 objects are identified with galaxies and quasars of the SDSS survey and the Veron-Veron ...
A. V. Mandzhos, F. G. Brawn, F. G. Brawn, G. K. Miley, I. D. Karachentsev, M. P. Veron-Cetty, M. Reinhardt, P. Nilson, P. Nilson, R. L. White, S. L. Parnovsky, T. H. Legg, V. R. Amirkhanian, V. R. Amirkhanyan, V. R. Amirkhanyan   +14 more
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

CHIME/FRB Discovery of the Extremely Active Fast Radio Burst Source FRB 20240114A

The Astrophysical Journal
Among the thousands of observed fast radio bursts (FRBs), a few sources exhibit exceptionally high burst activity observable by many telescopes across a broad range of radio frequencies. Almost all of these highly active repeaters have been discovered by
Kaitlyn Shin, Alice Curtin, Maxwell Fine, Ayush Pandhi, Shion Andrew, Mohit Bhardwaj, Shami Chatterjee, Amanda M. Cook, Emmanuel Fonseca, B. M. Gaensler, Jason Hessels, Naman Jain, Victoria M. Kaspi, Bikash Kharel, Adam E. Lanman, Mattias Lazda, Calvin Leung, Robert Main, Kiyoshi W. Masui, Daniele Michilli, Mason Ng, Kenzie Nimmo, Aaron B. Pearlman, Ue-Li Pen, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mawson Sammons, Ketan R. Sand, Paul Scholz, Kendrick Smith, Ingrid Stairs   +30 more
doaj   +1 more source

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

Simultaneous Multiwavelength Observations of the Repeating Fast Radio Burst FRB 20190520B with Swift and FAST

The Astrophysical Journal
Among several dozen known repeating fast radio bursts, those precisely localized offer the best opportunities to explore their multiwavelength counterparts, which are key to uncovering their origins.
Zhen Yan, Wenfei Yu, Kim L. Page, Jie Lin, Di Li, Chenhui Niu, Casey Law, Bing Zhang, Shami Chatterjee, Xian Zhang, Reshma Anna-Thomas   +10 more
doaj   +1 more source

The Radio Properties of Radio-Loud Narrow-Line Seyfert 1 Galaxies on Parsec Scales

, 2015
We present the detection of compact radio structures of fourteen radio-loud narrow line Seyfert 1 (NLS1) galaxies from Very Long Baseline Array observations at 5 GHz, which were performed in 2013.
Chen, Yongjun, Gu, Minfeng, Komossa, S., Shen, Zhi-Qiang, Wajima, Kiyoaki, Yuan, Weimin, Zensus, J. A., Zhou, Hongyan   +7 more
core   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Morphology of 137 Fast Radio Bursts Down to Microsecond Timescales from the First CHIME/FRB Baseband Catalog

The Astrophysical Journal
We present a spectro-temporal analysis of 137 fast radio bursts (FRBs) from the first CHIME/FRB baseband catalog, including 125 one-off bursts and 12 repeat bursts, down to microsecond resolution using the least-squares optimization fitting routine ...
Ketan R. Sand, Alice P. Curtin, Daniele Michilli, Victoria M. Kaspi, Emmanuel Fonseca, Kenzie Nimmo, Ziggy Pleunis, Kaitlyn Shin, Mohit Bhardwaj, Charanjot Brar, Matt Dobbs, Gwendolyn M. Eadie, B.M. Gaensler, Ronniy C. Joseph, Calvin Leung, Robert Main, Kiyoshi W. Masui, Ryan Mckinven, Ayush Pandhi, Aaron B. Pearlman, Masoud Rafiei-Ravandi, Mawson W. Sammons, Kendrick Smith, Ingrid H. Stairs   +23 more
doaj   +1 more source

Unveiling the nature of the unidentified gamma-ray sources VI: gamma-ray blazar candidates in the WISH survey and their radio properties

, 2014
According to the second Fermi LAT Catalog (2FGL), about one third of the gamma-ray sources listed have no assigned counterparts at lower energies. Many statistical methods have been developed to find proper counterparts for these sources.
D'Abrusco, R., Funk, S., Giroletti, M., Massaro, F., Nori, M., Paggi, A., Tosti, G.   +6 more
core   +1 more source

Identification of 5C4 Radio Sources [PDF]

Monthly Notices of the Royal Astronomical Society, 1972
BARBIERI, CESARE, F. Bertola
openaire   +2 more sources