Results 41 to 50 of about 178,649 (302)

A generalised Measurement Equation and van Cittert-Zernike theorem for wide-field radio astronomical interferometry

, 2008
We derive a generalised van Cittert-Zernike (vC-Z) theorem for radio astronomy that is valid for partially polarized sources over an arbitrarily wide field-of-view (FoV).
Carozzi, T. D., Woan, G.
core   +2 more sources

Defects Dynamic in Photo‐Excited CeO2 and their Influence on CO2 Photoreduction

Advanced Functional Materials, EarlyView.
X‐ray photoelectron spectroscopy study under light excitation is presented to track the defect dynamic (Ce4+ to Ce3+) in CeO2. Surface enhanced Raman spectroscopy confirmed the key role of Ce3+ states in controlling charge and energy transfer across the CeO2‐dye molecule interface.
Rambabu Yalavarthi, Shashi B. Mishra, Olivier Henrotte, Emiliano Cortes   +3 more
wiley   +1 more source

Radio astronomy [PDF]

The activities of the Deep Space Network in support of radio and radar astronomy operations during July and August 1980 are reported. A brief update on the OSS-sponsored planetary radio astronomy experiment is provided. Also included are two updates, one
Manchester, R. N., Taylor, R. M.
core   +4 more sources

Ice Lithography: Recent Progress Opens a New Frontier of Opportunities

Advanced Functional Materials, EarlyView.
This review focuses on recent advancements in ice lithography, including breakthroughs in compatible precursors and substrates, processes and applications, hardware, and digital methods. Moreover, it offers a roadmap to uncover innovation opportunities for ice lithography in fields such as biological, nanoengineering and microsystems, biophysics and ...
Bingdong Chang, Gwendoline A. E. Anand, Rubaiyet Haque, Dylan A. Chiaro, Mona Sharma, Andrew R. Williams, Frank Niklaus, Daryl W. Yee, Gavin M. King, Anpan Han   +9 more
wiley   +1 more source

The Murchison Widefield Array [PDF]

, 2010
It is shown that the excellent Murchison Radio-astronomy Observatory site allows the Murchison Widefield Array to employ a simple RFI blanking scheme and still calibrate visibilities and form images in the FM radio band.
Arcus, W., Benkevitch, L., Bernardi, Gianni, Bowman, J. D., Briggs, F. H., Bunton, J. D., Burns, S., Cappallo, R. J., Clark, Michael A., Corey, B. E., Dal, Kevin, de Oliveira-Costa, A., Derome, M. F., Desouza, L., Doeleman, S. S., Edgar, Richard G., Emrich, D., Gleadow, Stewart J., Glossop, M., Goeke, R., Greenhill, Lincoln J., Hazelton, B., Herne, D. E., Hewitt, J. N., Kamini, P. A., Kaplan, D. L., Kasper, J. C., Kincaid, B. B., Kocz, J., Kowald, E., Kratzenberg, E., Krishna, M. R. Gopala, Kumar, D., Lonsdale, C. J., Lynch, M. J., Madhavi, S., Matejek, M., McWhirter, S. R., Mitchell, Daniel A., Morales, M. F., Morgan, E., Oberoi, D., Ord, Stephen M., Pathikulangara, J., Pfister, Hanspeter, Prabu, T., Rogers, A., Salah, J. E., Sault, R. J., Shankar, N. Udaya, Srivani, K. S., Stevens, J., Tingay, S. J., Vaccarella, A., Waterson, M., Wayth, Randall B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C.   +59 more
core   +1 more source

Space-based Aperture Array For Ultra-Long Wavelength Radio Astronomy

, 2015
The past decade has seen the rise of various radio astronomy arrays, particularly for low-frequency observations below 100MHz. These developments have been primarily driven by interesting and fundamental scientific questions, such as studying the dark ...
Arts, Michel, Belien, Frederik, Bentum, Mark, Boonstra, Albert-Jan, Klein-Wolt, Marc, Rajan, Raj Thilak, Saks, Noah, van der Veen, Alle-Jan   +7 more
core   +1 more source

Realization of Complex‐Shaped Magnetic Nanotubes with 3D Printing and Electrodeposition

Advanced Functional Materials, EarlyView.
Complex‐shaped magnetic nanotubes were fabricated by coating three‐dimensional nanoscaffolds fabricated with focused electron beam induced deposition with a magnetic coating via electrodeposition. X‐ray magnetic microscopy and simulations revealed an azimuthal magnetic configuration within the nanotubes and pinning of domain walls at curved vertices ...
Claudia Fernández‐González, Pamela Morales‐Fernández, Luke Alexander Turnbull, Claas Abert, Dieter Suess, Michael Foerster, Miguel Á. Niño, Pawel Nita, Anna Mandziak, Simone Finizio, Nuria Bagués, Eva Pereiro, Amalio Fernández‐Pacheco, Lucas Pérez, Sandra Ruiz‐Gómez, Claire Donnelly   +15 more
wiley   +1 more source

SEASONAL VARIATIONS OF THE IONOSPHERE SCINTILLATIONS PARAMETERS OBTAINED FROM THE LONG OBSERVATIONS OF THE POWER COSMIC RADIO SOURCES AT THE DECAMETER WAVE RANGE

Odessa Astronomical Publications, 2016
Observations of the four power cosmic radio sources were carried out on the radio telescope (RT) URAN-4 during 1987-1990 and 1998-2007 at the frequencies 20 and 25 MHz.
O. A. Lytvynenko, S. K. Panishko
doaj   +1 more source

Polygon “Simeiz-Katsively” - study of changes in the geodynamic, heliogeophysical and climatic characteristics of Crimea [PDF]

ITM Web of Conferences, 2019
The solution to the problem of forecasting catastrophic natural and technological phenomena in Crimea is associated with the organization of complex observations in a network of local geodynamic polygons. Currently conducted on-site observations involved
Volvach Alexander, Kurbasova Galina, Dmytrotsa Andrej, Neyachenko Dmitry, Kanonidi Konstantin, Boborykina Olga   +5 more
doaj   +1 more source

Daris, a low-frequency distributed aperture array for radio astronomy in space [PDF]

, 2010
DARIS (Distributed Aperture Array for Radio Astronomy in Space) is a radio astronomy space mission concept aimed at observing the low-frequency radio sky in the range 1-10 MHz.
Bentum, M.J., Boonstra, A.J., Falcke, H., Klooster, K. van 't, Saks, N.   +4 more
core   +1 more source