Results 61 to 70 of about 455,998 (205)

Multi-Scale CLEAN deconvolution of radio synthesis images

, 2008
Radio synthesis imaging is dependent upon deconvolution algorithms to counteract the sparse sampling of the Fourier plane. These deconvolution algorithms find an estimate of the true sky brightness from the necessarily incomplete sampled visibility data.
Cornwell, T. J.
core   +1 more source

A new approach to multi-frequency synthesis in radio interferometry

, 2014
We present a new approach to multi-frequency synthesis in radio astronomy. Using Bayesian inference techniques, the new technique estimates the sky brightness and the spectral index simultaneously.
Bell, M. A., Enßlin, T., Junklewitz, H.
core   +1 more source

VADER - A Satellite Mission Concept For High Precision Dark Energy Studies [PDF]

, 2006
We present a satellite mission concept to measure the dark energy equation of state parameter w with percent-level precision. The Very Ambitious Dark Energy Research satellite (VADER) is a multi-wavelength survey mission joining X-ray, optical, and IR ...
Diethart, Cornelia, Fassbender, Rene, Fertl, Peter, Hasinger, Guenther, Hayes, Matthew, Koestner, Stefan, Kruselburger, Andreas, Schuecker, Peter, Stegmaier, Jutta, Valiante, Elisabetta, Weijmans, Anne-Marie   +10 more
core   +2 more sources

Solar Energy Forecasting Framework Using Prophet Based Machine Learning Model: An Opportunity to Explore Solar Energy Potential in Muscat Oman

Energies
The unpredictable nature of renewable energy sources, such as wind and solar, makes them unreliable sources of energy for the power system. Nevertheless, with the advancement in the field of artificial intelligence (AI), one can predict the availability ...
Mazhar Baloch, Mohamed Shaik Honnurvali, Adnan Kabbani, Touqeer Ahmed, Sohaib Tahir Chauhdary, Muhammad Salman Saeed   +5 more
doaj   +1 more source

Monitoring of snow surface near-infrared bidirectional reflectance factors with added light-absorbing particles [PDF]

The Cryosphere, 2019
Broadband snow albedo can range from 0.3 to 0.9 depending on microphysical properties and light-absorbing particle (LAP) concentrations. Beyond the widely observed direct and visibly apparent effect of darkening snow, it is still unclear how LAPs ...
A. Schneider, M. Flanner, R. De Roo, A. Adolph   +3 more
doaj   +1 more source

Compact groups in theory and practice -- IV. The connection to large-scale structure

, 2011
We investigate the properties of photometrically-selected compact groups (CGs) in the Sloan Digital Sky Survey. In this paper, the fourth in a series, we focus on understanding the characteristics of our observed CG sample with particular attention paid ...
Abazajian, Aceves, Adelman-McCarthy, Alan W. McConnachie, Allen, Andernach, Andernach, Athanassoula, Baldry, Balogh, Bamford, Barnes, Barton, Barton, Biviano, Blanton, Blanton, Blanton, Brasseur, Carlberg, Cheng, Cooper, Cooray, Coziol, Coziol, David R. Patton, de Carvalho, de la, De Lucia, Diaferio, Dressler, Dubinski, Díaz-Giménez, Eke, Ellison, Farouki, Goto, Governato, Governato, Gunn, Hickson, Hickson, Hickson, Huchra, Iovino, J. Trevor Mendel, Kauffmann, Lee, Luc Simard, Martínez, McConnachie, McConnachie, McIntosh, Mendes, Mendes, Moore, Navarro, Navarro, Navarro, Niemi, Nulsen, Palumbo, Patton, Postman, Proctor, Ramella, Ramella, Rood, Rose, Sara L. Ellison, Simard, Simard, Skibba, Springel, Tago, Toomre, van der Wel, Zepf   +77 more
core   +1 more source

PPAK Wide-field Integral Field Spectroscopy of NGC 628: I. The largest spectroscopic mosaic on a single galaxy [PDF]

, 2010
We present a wide-field IFS survey on the nearby face-on Sbc galaxy NGC 628, comprising 11094 individual spectra, covering a nearly circular field-of-view of ~6 arcmin in diameter, with a sampling of ~2.7 arcsec per spectrum in the optical wavelength ...
Diaz, A. I., Hao, C. N., Johnson, B. D., Kennicutt, R. C., Pasquali, A., Rosales-Ortega, F. F., Sanchez, S. F.   +6 more
core   +2 more sources

Development of new environmentally friendly anticorrosive surface treatments for new Al-Li alloys protection within the frame of Clean Sky2

, 2018
Innovative, last generation Al-Li alloys were evaluated in terms of mechanical performance and corrosion protection in order to be used in aircraft structures.
A. Karanika, N. Vourdas, A. Makrikostas, R. Marini, T. Plagianakos, S. Kalogeropoulos   +5 more
semanticscholar   +1 more source

A new map-making algorithm for CMB polarisation experiments

, 2015
With the temperature power spectrum of the cosmic microwave background (CMB) at least four orders of magnitude larger than the B-mode polarisation power spectrum, any instrumental imperfections that couple temperature to polarisation must be carefully ...
Battye, Richard A., Bonaldi, A., Brown, Michael L., Wallis, Christopher G. R.   +3 more
core   +1 more source

Regional validation of the solar irradiance tool SolaRes in clear-sky conditions, with a focus on the aerosol module [PDF]

Atmospheric Measurement Techniques
The Solar Resource estimate (SolaRes) tool based on the Speed-up Monte Carlo Advanced Radiative Transfer code using GPU (SMART-G) has the ambition to fulfil both research and industrial applications by providing accurate, precise, and high-time ...
T. Elias, N. Ferlay, G. Chesnoiu, I. Chiapello, M. Moulana   +4 more
doaj   +1 more source