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Various sign-posts of recent star-formation activity, such as water and methanol maser emission or magnetically active low-mass young stars, can be detected with Very Long Baseline Interferometry (VLBI) radio arrays. The extremely accurate…

Astrophysics of Galaxies · Physics 2018-10-17 Laurent Loinard , Mark J. Reid

The XMM Large Scale Structure Survey (XMM-LSS) is a major project to map the large scale structure of the universe out to cosmological distances. An 8 degree by 8 degree region will be surveyed by XMM with planned optical follow-up to…

The Low Frequency Array (LOFAR) is a new generation of electronic radio telescope based on aperture array technology. The telescope is being developed by ASTRON, and currently being rolled out across the Netherlands and other countries in…

Cosmology and Nongalactic Astrophysics · Physics 2009-03-07 M. A. Garrett , H. Rampadarath , E. Lenc , Olaf Wucknitz

Fast radio bursts (FRBs) represent one of the most exciting astrophysical discoveries of the recent past. The study of their low-frequency emission, which was only effectively picked up about ten years after their discovery, has helped…

High Energy Astrophysical Phenomena · Physics 2022-03-10 Maura Pilia

We discuss the present performance and the future perspectives of VLBI in the 3 mm to 0.85 mm observing bands (so called mm-VLBI). The availability of new telescopes and the recent technical development towards larger observing bandwidth…

Astrophysics · Physics 2008-12-23 T. P. Krichbaum , U. Bach , D. A. Graham , W. Alef , A. Roy , A. Witzel , J. A. Zensus , M. Bremer , S. Sanchez

We analyze the results of processing of data of observations which had been carried out with the VLBA during 10 last years. All the data have been retrieved from archive of the National Radio Astronomy Observatory (USA NRAO, Socorro, New…

Cosmology and Nongalactic Astrophysics · Physics 2010-01-06 A. Chuprikov , I. Guirin

The LIGO (Laser Interferometer Gravitational-Wave Observatory) detectors have just completed their first science run, following many years of planning, research, and development. LIGO is a member of what will be a worldwide network of…

Astrophysics · Physics 2014-10-13 Scott A. Hughes

One primary focus of next generation wireless communication networks is the millimeterwave (mmWave) spectrum, typically considered in the 30 GHz to 300 GHz frequency range. Despite their promise of high data rates, mmWaves suffer from…

Networking and Internet Architecture · Computer Science 2025-07-01 Shawon Mitra , Subhojit Sarkar , Sasthi C. Ghosh

Next-generation multiple access (NGMA) serves as an umbrella term for transmission schemes distinct from conventional orthogonal methods. A key candidate of NGMA, non-orthogonal multiple access (NOMA), emerges as a solution to enhance…

Information Theory · Computer Science 2024-10-02 Hamid Jafarkhani , Hossein Maleki , Mojtaba Vaezi

We present LOFAR High-Band Array (HBA) observations of the Herschel-ATLAS North Galactic Pole survey area. The survey we have carried out, consisting of four pointings covering around 142 square degrees of sky in the frequency range…

Direct detection of gravitational radiation in the audio band is being pursued with a network of kilometer-scale interferometers (LIGO, Virgo, KAGRA). Several space missions (LISA, DECIGO, BBO) have been proposed to search for sub-Hz…

General Relativity and Quantum Cosmology · Physics 2013-12-16 Jan Harms , Bram J. J. Slagmolen , Rana X. Adhikari , M. Coleman Miller , Matthew Evans , Yanbei Chen , Holger Müller , Masaki Ando

Observations that require large physical instrument dimensions and/or a considerable amount of cryogens, as it is for example the case for high spatial resolution far infrared astronomy, currently still face technological limits for their…

The Office of Diversity and Inclusion (ODI) and the Education and Public Outreach (EPO) Department serve the strategic goal of the National Radio Astronomy Observatory (NRAO) to broaden public awareness of, support for, and participation in…

Physics Education · Physics 2018-10-23 Lyndele von Schill , Suzanne Gurton

The novel concept of near-field non-orthogonal multiple access (NF-NOMA) communications is proposed. The near-filed beamfocusing enables NOMA to be carried out in both angular and distance domains. Two novel frameworks are proposed, namely,…

Information Theory · Computer Science 2023-05-22 Jiakuo Zuo , Xidong Mu , Yuanwei Liu

GRANDMA is a world-wide collaboration with the primary scientific goal of studying gravitational-wave sources, discovering their electromagnetic counterparts and characterizing their emission. GRANDMA involves astronomers, astrophysicists,…

The Global mm-VLBI Array (GMVA) has demonstrated the ability to resolved what may be the general relativistic shadow of the supermassive black hole in M87 at 86 GHz, as well as delineate the inner jet to $\sim 1$~mas distance. We…

High Energy Astrophysical Phenomena · Physics 2023-09-26 C. L. Carilli , R. C. Walker , E. Murphy , B. Mason

The coming decades will see gravitational-wave (GW) astronomy expand decisively into the mHz-Hz frequency range, opening access to a population of compact binaries that are currently invisible or only detectable moments before merger. The…

Instrumentation and Methods for Astrophysics · Physics 2025-12-19 F. Patat , S. Piranomonte , S. Benetti , A. Bonforte , R. Della Ceca , G. Di Rico , A. Frigeri , J. Harms , M. Olivieri , A. Perali , P. Severgnini , A. Stallone , the LGWA Collaboration

We describe an "active" antenna system for HF/VHF (long wavelength) radio astronomy that has been successfully deployed 256-fold as the first station (LWA1) of the planned Long Wavelength Array. The antenna system, consisting of crossed…

The interferometers being planned for second generation LIGO promise and order of magnitude increase in broadband strain sensitivity--with the corresponding cubic increase in detection volume--and an extension of the observation band to…

General Relativity and Quantum Cosmology · Physics 2009-11-10 Peter Fritschel

Bluetooth Low Energy (BLE) is one of the key enablers for low-power and low-cost applications in consumer electronics and the Internet of Things. The latest features such as audio and direction finding will introduce more and more devices…

Information Theory · Computer Science 2023-01-20 Julian Karoliny , Thomas Blazek , Andreas Springer , Hans-Peter Bernhard