Results 81 to 90 of about 33,319 (274)

Strong field limit analysis of gravitational retro-lensing

, 2003
We present a complete treatment in the strong field limit of gravitational retro-lensing by a static spherically symmetric compact object having a photon sphere.
A. Bhadra, D.E. Holtz, Diego F. Torres, E. Algol, E.F. Eiroa, Ernesto F. Eiroa, F. De Paolis, K.S. Virbhadra, K.S. Virbhadra, R. Schödel, S. Capozziello, S. Frittelli, V. Bozza, V. Bozza, V. Bozza, V. Bozza   +15 more
core   +1 more source

Queer in Science, Technology, Engineering, and Mathematics: Following the Intersections of Queerness, Transness and Science Identities

Science Education, EarlyView.
ABSTRACT This multiple case study explores the intersections of queerness/transness and science education through a combined framework of queer theory, intersectionality, the construct of figured worlds and science identity. The study uses a life‐history approach to characterize the trajectories of three purposefully selected queer individuals who are ...
Nelly K. M. Marosi, Lucy Avraamidou, Mónica López López, Allison Jardim Gonsalves   +3 more
wiley   +1 more source

A Lens Finder Map to Check Claimed High-z Galaxies behind SMACS J0723.3-7327

The Astrophysical Journal
The first science image released by the James Webb Space Telescope (JWST) reveals numerous galaxies in the distant background of the galaxy cluster SMACS J0723.3-7327.
Alex Chow, Sung Kei Li, Jeremy Lim, Tom Broadhurst, Man Cheung Alex Li, James Nianias, Jake Summers, Rogier Windhorst   +7 more
doaj   +1 more source

The Distance Duality Relation from Strong Gravitational Lensing

, 2016
Under very general assumptions of metric theory of spacetime, photons traveling along null geodesics and photon number conservation, two observable concepts of cosmic distance, i.e.
Biesiada, Marek, Cao, Shuo, Li, Zhengxiang, Liao, Kai, Zheng, Xiaogang, Zhu, Zong-Hong   +5 more
core   +1 more source

The Measurement‐Impact Gap: A Bibliometric Diagnosis of Development Finance Institutions and SDG Research

Sustainable Development, EarlyView.
ABSTRACT The role of Development Finance Institutions (DFIs) in achieving the Sustainable Development Goals (SDGs) is a topic of growing scholarly importance. While existing literature has mapped the thematic scope of this field, a critical diagnosis of its intellectual structure and inherent biases is missing.
Juan Martinez Alvarez, Simon Fernandez‐Vazquez, Jiajun Xu, Rafael Rosillo   +3 more
wiley   +1 more source

A deconstruction of methods to derive one-point lensing statistics

The Open Journal of Astrophysics
Gravitational lensing is a crucial tool for exploring cosmic phenomena, providing insights into galaxy clustering, dark matter, and dark energy. Given the substantial computational demands of $N$-body simulations, approximate methods like $\texttt ...
Viviane Alfradique, Tiago Castro, Valerio Marra, Miguel Quartin, Carlo Giocoli, Pierluigi Monaco   +5 more
doaj   +1 more source

Common purpose advantage: Reviving a managerial theory of the firm?

Strategic Management Journal, EarlyView.
Abstract Research Summary What is the most effective way to distribute organizational objectives across managers? While prior work suggests managers should each focus on a single objective, we draw on Barnard's original insights on corporate purpose to identify conditions when managers pursuing the full set of objectives is advantageous.
Rodolphe Durand, Harrison John Munro‐Clark   +1 more
wiley   +1 more source

Advancing Organ‐on‐Chip Models With a Sacrificial Granular Hydrogel Strategy for Enhanced Permeability and Biomimicry

Small Methods, EarlyView.
A reversed granular hydrogel strategy creates highly porous 3D matrices within bone marrow (BM)‐on‐chip devices. Sacrificial alginate microgels generate interconnected microporosity that enhances nano/microparticle and cell mobilitymimicking pathogen agents—from the perfused vascular channel into the BM compartment, while preventing cell sedimentation ...
Hugo R Caires, Óscar Castillo‐Fernández, Núria Sima, Mariana V Magalhães, Andreu Benavent‐Claró, Nil Masó‐Castro, Wanlapa Roobsoong, Carmen Fernandez‐Becerra, Aurora Hernández‐Machado, Hernando A. del Portillo, Cristina C. Barrias   +10 more
wiley   +1 more source

Microlensing-Based Studies of the Unresolved Structure of AGNs and the Composition of Lensing Galaxies

Open Astronomy, 2011
Multiple images of quasars formed by gravitational lensing are typically seen through the lensing galaxy. The granulation of the galaxy in stars or other compact objects induces local (‘microscopic’) but strong fluctuations in the gravitational potential
Gradolph Teresa Mediavilla, Gradolph Evencio Mediavilla, Muñoz Jose Antonio   +2 more
doaj   +1 more source

Nonsingular density profiles of dark matter halos and Strong gravitational lensing

, 2005
We use the statistics of strong gravitational lenses to investigate whether mass profiles with a flat density core are supported. The probability for lensing by halos modeled by a nonsingular truncated isothermal sphere (NTIS) with image separations ...
Bartelmann M., Chen D.-M., Chen D.-M., Da‐Ming Chen, Fukugita M., Fukugita M., Ostriker J. P., Patnaik A. R., Wang J., Wu X.-P.   +9 more
core   +3 more sources