Results 141 to 150 of about 33,319 (274)

Can strong gravitational lensing distinguish naked singularities from black holes? [PDF]

, 2012
Satyabrata Sahu, Mandar Patil, D. Narasimha, Pankaj S. Joshi   +3 more
openalex   +1 more source

A Three‐Stage Model of the Maturation of Nascent Policy Subsystems Toward Stable Advocacy Coalitions, With Evidence From the UK's Response to COVID‐19

Policy Studies Journal, EarlyView.
ABSTRACT Policy subsystems are comprised of competing advocacy coalitions, in which public and private political actors with shared belief systems learn from each other and coordinate their strategies in the pursuit of influencing policy making in their favor.
Kristijan Garic, Philip Leifeld
wiley   +1 more source

Lens Modeling of STRIDES Strongly Lensed Quasars Using Neural Posterior Estimation

The Astronomical Journal
Strongly lensed quasars can be used to constrain cosmological parameters through time-delay cosmography. Models of the lens masses are a necessary component of this analysis.
Sydney Erickson, Sebastian Wagner-Carena, Phil Marshall, Martin Millon, Simon Birrer, Aaron Roodman, Thomas Schmidt, Tommaso Treu, Stefan Schuldt, Anowar J. Shajib, Padma Venkatraman, The LSST Dark Energy Science Collaboration   +11 more
doaj   +1 more source

Differentiable probabilistic programming for strong gravitational lensing [PDF]

, 2019
Marco Chianese
openalex   +1 more source

Embracing the politics of transformation: Policy action as “battle‐settlement events”

Review of Policy Research, EarlyView.
Abstract Societal transformations for addressing climate change are intensely contested and at risk of resistance and backlash to ambitious policy action. But they are frequently modeled through heuristics such as S‐curves which abstract from such conflicts, assuming increasing returns to scale as a driver of transformations.
James Patterson, Matthew Paterson
wiley   +1 more source

Galaxy–Galaxy Strong Lensing with U-Net (GGSL-UNet). I. Extracting Two-dimensional Information from Multiband Images in Ground and Space Observations

The Astrophysical Journal Supplement Series
We present a novel deep learning method to separately extract the two-dimensional flux information of the foreground galaxy (deflector) and background system (source) of galaxy–galaxy strong-lensing events using U-Net (GGSL-UNet for short). In particular,
Fucheng Zhong, Ruibiao Luo, Nicola R. Napolitano, Crescenzo Tortora, Rui Li, Xincheng Zhu, Valerio Busillo, L. V. E. Koopmans, Giuseppe Longo   +8 more
doaj   +1 more source

Detecting low-mass haloes with strong gravitational lensing I: the effect of data quality and lensing configuration [PDF]

, 2022
Giulia Despali, Simona Vegetti, Simon D. M. White, Devon Powell, Hannah Stacey, C. D. Fassnacht, Francesca Rizzo, Wolfgang Enzi   +7 more
openalex   +1 more source

What's Hard Is Yet to Come: Critical Junctures and Changing Gender Beliefs at the Transition From College to Career

Sociological Forum, EarlyView.
ABSTRACT Drawing on 71 interviews with 20 respondents across four waves before and after their graduation, we explore whether and how the transition from college to career can lead to new experiences with and understandings of gender inequality for elite graduates of color. While all respondents experienced or witnessed gender inequality and recognized
Emily K. Carian, Amy L. Johnson
wiley   +1 more source

Gravitational lensing by a dark compact object in modified gravity and observational constraints from Einstein rings

European Physical Journal C: Particles and Fields
In this manuscript, we provide a comprehensive study of gravitational lensing by dark compact objects predicted by modified gravity (MOG) based on the scalar–vector–tensor action, with the aim of providing new insights into the nature of gravitational ...
Nagina Rehman, Zoe C. S. Chan, Mubasher Jamil, Mustapha Azreg-Aïnou   +3 more
doaj   +1 more source

Gravitational Lensing in Presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow [PDF]

, 2017
Gennady Bisnovatyi-Kogan, Oleg Tsupko
openalex   +1 more source