Zobrazeno 1 - 10
of 791
pro vyhledávání: '"Sims, A. H."'
Autor:
Rezapour, Mostafa, Seymour, Rachel B., Sims, Stephen H., Karunakar, Madhav A., Habet, Nahir, Gurcan, Metin Nafi
This study explored the potential of gait analysis as a tool for assessing post-injury complications, e.g., infection, malunion, or hardware irritation, in patients with lower extremity fractures. The research focused on the proficiency of supervised
Externí odkaz:
http://arxiv.org/abs/2309.15990
Autor:
Razavi-Ghods, Nima, Roque, Ian L. V., Carey, Steven H., Ely, John A., Handley, Will, Magro, Alessio, Chiello, Riccardo, Huang, Tian, Alexander, P., Anstey, D., Bernardi, G., Bevins, H. T. J., Cavillot, J., Croukamp, W., Cumner, J., Acedo, E. de Lera, de Villiers, D. I. L., Fialkov, A., Gessey-Jones, T., Gueuning, Q., Josaitis, A. T., Kulkarni, G., Leeney, S. A. K., Maiolino, R., Meerburg, P. D., Mittal, S., Pagano, M., Pegwal, S., Pieterse, C., Pritchard, J. R., Saxena, A., Scheutwinkel, K. H., Scott, P., Shen, E., Sims, P. H., Smirnov, O., Spinelli, M., Zarb-Adami, K.
We detail the the REACH radiometric system designed to enable measurements of the 21-cm neutral hydrogen line. Included is the radiometer architecture and end-to-end system simulations as well as a discussion of the challenges intrinsic to highly-cal
Externí odkaz:
http://arxiv.org/abs/2307.00099
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2023
We present a comprehensive simulation-based study of the BayesEoR code for 21 cm power spectrum recovery when analytically marginalizing over foreground parameters. To account for covariance between the 21 cm signal and contaminating foreground emiss
Externí odkaz:
http://arxiv.org/abs/2302.04058
Autor:
Rogers, Alan E. E., Barrett, John P., Bowman, Judd D., Cappallo, Rigel, Lonsdale, Colin J., Mahesh, Nivedita, Monsalve, Raul A., Murray, Steven G., Sims, Peter H.
Scattering from objects near an antenna produce correlated signals from strong compact radio sources in a manner similar to those used by the Sea Interferometer to measure the radio source positions using the fine frequency structure in the total pow
Externí odkaz:
http://arxiv.org/abs/2212.04526
Autor:
Sims, Peter H., Bowman, Judd D., Mahesh, Nivedita, Murray, Steven G., Barrett, John P., Cappallo, Rigel, Monsalve, Raul A., Rogers, Alan E. E., Samson, Titu, Vydula, Akshatha K.
Accurately accounting for spectral structure in spectrometer data induced by instrumental chromaticity on scales relevant for detection of the 21-cm signal is among the most significant challenges in global 21-cm signal analysis. In the publicly avai
Externí odkaz:
http://arxiv.org/abs/2212.03875
Autor:
Acedo, E. de Lera, de Villiers, D. I. L., Razavi-Ghods, N., Handley, W., Fialkov, A., Magro, A., Anstey, D., Bevins, H. T. J., Chiello, R., Cumner, J., Josaitis, A. T., Roque, I. L. V., Sims, P. H., Scheutwinkel, K. H., Alexander, P., Bernardi, G., Carey, S., Cavillot, J., Croukamp, W., Ely, J. A., Gessey-Jones, T., Gueuning, Q., Hills, R., Kulkarni, G., Maiolino, R., Meerburg, P. D., Mittal, S., Pritchard, J. R., Puchwein, E., Saxena, A., Shen, E., Smirnov, O., Spinelli, M., Zarb-Adami, K.
Publikováno v:
Nature Astronomy 6, p 984 998, 2022
Observations of the 21-cm line from primordial hydrogen promise to be one of the best tools to study the early epochs of the Universe: the Dark Ages, the Cosmic Dawn, and the subsequent Epoch of Reionization. In 2018, the EDGES experiment caught the
Externí odkaz:
http://arxiv.org/abs/2210.07409
Autor:
Murray, Steven G., Bowman, Judd D., Sims, Peter H., Mahesh, Nivedita, Rogers, Alan E. E., Monsalve, Raul A., Samson, Titu, Vydula, Akshatha Konakondula
We develop a Bayesian model that jointly constrains receiver calibration, foregrounds and cosmic 21cm signal for the EDGES global 21\,cm experiment. This model simultaneously describes calibration data taken in the lab along with sky-data taken with
Externí odkaz:
http://arxiv.org/abs/2209.03459
High fidelity radio interferometric data calibration that minimises spurious spectral structure in the calibrated data is essential in astrophysical applications, such as 21 cm cosmology, which rely on knowledge of the relative spectral smoothness of
Externí odkaz:
http://arxiv.org/abs/2206.13554
In a companion paper, we presented BayesCal, a mathematical formalism for mitigating sky-model incompleteness in interferometric calibration. In this paper, we demonstrate the use of BayesCal to calibrate the degenerate gain parameters of full-Stokes
Externí odkaz:
http://arxiv.org/abs/2206.13553
Autor:
Bevins, Harry T. J., Handley, William J., Lemos, Pablo, Sims, Peter H., Acedo, Eloy de Lera, Fialkov, Anastasia, Alsing, Justin
Bayesian analysis has become an indispensable tool across many different cosmological fields including the study of gravitational waves, the Cosmic Microwave Background and the 21-cm signal from the Cosmic Dawn among other phenomena. The method provi
Externí odkaz:
http://arxiv.org/abs/2205.12841