Results 61 to 70 of about 178,649 (302)

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

Heterogeneous Nanopore Arrays – Selective Modification of Nanopores Embedded in a Membrane

Advanced Materials, EarlyView.
Biological processes rely on the concerted action of channels with different functionalities embedded in the same membrane. Inspired by nature, heterogeneous nanopore arrays are prepared where two nanopores are connected in parallel and function as two different elements of an ionic circuit: a diode and a resistor.
Ethan Cao, Zuzanna S. Siwy
wiley   +1 more source

Unveiling the power of multimodal large language models for radio astronomical image understanding and question answering

Machine Learning: Science and Technology
Although multimodal large language models (MLLMs) have shown remarkable achievements across various scientific domains, their applications in radio astronomy remain largely unexplored.
Fuyong Zhao, Yuyang Li, Zhenyu Liu, Panfeng Chen, Cunshi Wang, Jifeng Liu, Hui Li, Yanhao Wang   +7 more
doaj   +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

Analysis of KVN 21m Radio Antenna Optics using Ray-Tracing Method [PDF]

Journal of Astronomy and Space Sciences, 2009
In this work, we calculate drop in antenna gain, aperture phase distribution, and antenna pointing shift of KVN(Korean VLBI Network) 21m shaped Cassegrain antenna due to misalignments of antenna optics using ray-tracing method.
Jae-Han Bae, Do-Young Byun
doaj   +1 more source

A search for periodicity in the light curves of selected blazars

, 2005
We present an analysis of multifrequency light curves of the sources 2223-052 (3C 446), 2230+114 (CTA 102), and 2251+158 (3C 454.3), which had shown evidence of quasi-periodic activity.
A. Ciaramella, A. J. Kemball, A. P. Lobanov, A.M. Stirling, B. C. Kelly, B. Sundelius, C. Barbieri, C. Barbieri, C. M. Raiteri, C.-y. Su, F. T. Rantakyrö, G. B. Sholomitsky, H. D. Aller, H. Teräsranta, I. I. K. Pauliny-Toth, I. Jurkevich, J. F. Zhou, J. H. Fan, J. J. Blom, J. L. Gomez, J. L. Gomez, J. R. Webb, K. I. Kellermann, M. F. Aller, M. G. Haehnelt, M. Lainela, M. R. Kidger, M. R. Kidger, M. T. Hanski, M. Tornikoski, M. Villata, N. A. Kudryavtseva, P. A. Hughes, R. A. Edelson, R. B. Pomphrey, S. G. Jorstad, T. B. Pyatunina, T. B. Pyatunina, T. Pursimo, T. V. Cawthorne, Y. Terzian   +40 more
core   +1 more source

Radio Astronomy [PDF]

, 1977
Contains research objectives and summary of research on seven research projects.M.I.T. Sloan Fund for Basic ResearchNational Aeronautics and Space Administration (Contract NAS5-21980)National Aeronautics and Space Administration (Contract NAS5-22485 ...
Allen, Barry R., Baan, Willem A., Barrett, John W., Burke, Bernard F., Crane, Patrick C., Garcia-Barreto, J. Antonio, Greenfield, Perry E., Guiffrida, Thomas S., Haschick, Aubrey D., Kierstead, John D., Myers, Philip C., Papa, D. Cosmo, Parrish, Alan, Rosenkranz, Philip W., Staelin, David H., Walker, Robert C.   +15 more
core   +1 more source

The Promise of Solid Lubricants for a Sustainable Future

Advanced Materials, EarlyView.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher, Andrey A. Voevodin, András Korényi‐Both, Maria Clelia Righi, Christopher DellaCorte, Nazlim Bagcivan, Ali Erdemir, Carsten Gachot   +7 more
wiley   +1 more source

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  

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