Zobrazeno 1 - 10
of 992
pro vyhledávání: '"S Ruf"'
Autor:
Zvi Bern, Enrico Herrmann, Radu Roiban, Michael S. Ruf, Alexander V. Smirnov, Vladimir A. Smirnov, Mao Zeng
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 10, Pp 1-47 (2024)
Abstract We compute the potential-graviton contribution to the scattering amplitude, the radial action, and the scattering angle of two extremal black holes in N $$ \mathcal{N} $$ = 8 supergravity at the fifth post-Minkowskian order and to next-to-le
Externí odkaz:
https://doaj.org/article/0f39b7fc36b9442e9d3995eab007aa5e
Autor:
Callum R. T. Jones, Michael S. Ruf
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-36 (2024)
Abstract We describe an approach to incorporating the physical effects of the absorption of energy by the event horizon of black holes in the scattering amplitudes based post-Minkowskian, point-particle effective description. Absorptive dynamics are
Externí odkaz:
https://doaj.org/article/6723ef3d6b6b44fca6ebab508039344f
Autor:
April M. Warnock, Christopher S. Ruf, Anthony Russel, Mohammad M. Al-Khaldi, Rajeswari Balasubramaniam
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 6189-6200 (2024)
A new wind speed product has been developed using bistatic radar data from NASA's Cyclone Global Navigation Satellite System (CYGNSS) mission. The product addresses shortcomings in two existing CYGNSS gridded wind speed products, the L3 gridded fully
Externí odkaz:
https://doaj.org/article/37d57f110489426e8db58852bd8f4cb2
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 2336-2346 (2024)
A parametric error model is developed to represent the uncertainty in retrieval of hurricane force wind speed by a spaceborne GNSS-R instrument. The functional form of the model is constructed based on a bottom–up consideration of the primary contr
Externí odkaz:
https://doaj.org/article/d51b9957d18a465490545663443b0465
Publikováno v:
Remote Sensing, Vol 16, Iss 8, p 1446 (2024)
In recent years, Global Navigation Satellite System reflectometry (GNSS-R) has been explored as a methodology for inland water body characterization. However, thorough characterization of the sensitivity and behavior of the GNSS-R signal to inland wa
Externí odkaz:
https://doaj.org/article/89a5c841cc69433a8d7caed69f5c6a62
Publikováno v:
Remote Sensing, Vol 16, Iss 5, p 742 (2024)
All sensing systems have some inherent error. Often, these errors are systematic, and observations taken within a similar region of space and time can have correlated error structure. However, the data from these systems are frequently assumed to hav
Externí odkaz:
https://doaj.org/article/82d77304d971475286363412fd42373d
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 9943-9952 (2022)
Freeze/Thaw (F/T) surface state detection and imaging has been demonstrated as a capability of NASA's Cyclone Global Navigation Satellite System mission. The objective of the research presented here is the application of an existing F/T retrieval alg
Externí odkaz:
https://doaj.org/article/a40531c105e74807bf21cc6c272071d6
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-70 (2021)
Abstract We compute classical gravitational observables for the scattering of two spinless black holes in general relativity and N $$ \mathcal{N} $$ =8 supergravity in the formalism of Kosower, Maybee, and O’Connell (KMOC). We focus on the gravitat
Externí odkaz:
https://doaj.org/article/0af0af7aa0164022a92e5d375a1825a6
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 11, Pp 1-67 (2020)
Abstract We use N $$ \mathcal{N} $$ = 8 supergravity as a toy model for understanding the dynamics of black hole binary systems via the scattering amplitudes approach. We compute the conservative part of the classical scattering angle of two extremal
Externí odkaz:
https://doaj.org/article/813c27b19b10469da5604633d14897c0
Autor:
Estel Cardellach, Weiqiang Li, Antonio Rius, Maximilian Semmling, Jens Wickert, Florian Zus, Christopher S. Ruf, Carlo Buontempo
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 13, Pp 102-112 (2020)
The precision of sea surface altimetry using bistatically reflected signals of the Global Navigation Satellite System (GNSS) is typically one to two orders of magnitude worse than dedicated radar altimeters. However, when the scattering is coherent,
Externí odkaz:
https://doaj.org/article/80cca50551984ca58b728c5f3ec99676