Results 141 to 150 of about 181,041 (277)
, 1999 The purpose of these lecture notes is to describe the gravitational lens effects in different astrophysical contexts. These notes are voluntarily focused on the fundamental mechanisms and the basic concepts that are useful to describe these effects. The observational consequences are presented in more details in accompanying notes by Y. Mellier.
openaire +2 more sources
, 2000 We review theory and applications of weak gravitational lensing. After summarising Friedmann-Lemaitre cosmological models, we present the formalism of gravitational lensing and light propagation in arbitrary space-times.
Bartelmann, M. (Max-Planck-Institut fuer Astrophysik, Garching (Germany)) +2 more
core
The Open Journal of AstrophysicsThe apparent angular positions of quasars are deflected on the sky by the gravitational field sourced by foreground matter. This weak lensing effect is measurable through the distortions it introduces in the lensed quasar spectra.
Patrick Shaw +2 more
doaj +1 more source
The Vicissitudes of the Nafs: Madness, Paralysis, and the Work of Transgression in Sufi Ethics
Anthropology of Consciousness, EarlyView.ABSTRACT How should we theorize Sufi ethics when the practice of zikr (remembrance) that leads to spiritual enlightenment (tazkiyya) might also bring one to the brink of majzubiyat (madness)? What forms of regulation or restraint are imagined or enacted by practitioners to prevent spiritual boundlessness from perverting into its underside of paralysis (
Muhammad Osama Imran
wiley +1 more source
Beyond Bia Hơi? Distinction and Aspiration in Hanoi's Craft Beer Scene
Asia Pacific Viewpoint, EarlyView.ABSTRACT In this article we examine the emergence of Hanoi's craft beer scene as a window into shifting class identities, aspirational consumption, and local–global negotiations in contemporary Vietnam. We bring together Bourdieu's theorisation of taste as symbolic capital with Appadurai's concept of aspiration to analyse how consumption practices ...
Sarah Turner, Chính Trọng Nguyễn
wiley +1 more source
Quasar Microlensing Statistics and Flux-ratio Anomalies in Lens Models
The Astronomical JournalPrecise lens modeling is a critical step in time delay studies of multiply imaged quasars, which are key for measuring some important cosmological parameters (especially H _0 ).
E. Mediavilla +2 more
doaj +1 more source
Lodge moraines: a common yet underreported end‐moraine type—a review
Boreas, EarlyView.Lodge moraines are a distinct genetic type of end moraine formed by submarginal accretion of subglacial till; they are some of the largest end moraines in the world. Although underreported in the literature, they are of equal importance to push, dump and hummocky end moraines. End moraines are formed at glacier ice margins and show the extent of former
Mark D. Johnson +11 more
wiley +1 more source
Why We Shouldn't Trust Institutions: Critical Theory and the Case for Radical Distrust
Constellations, EarlyView.
Zohreh Khoban
wiley +1 more source
The State of the Art in Visualization Literacy
Computer Graphics Forum, EarlyView.In this survey paper, we review 385 visualization literacy papers to understand the state of the field. We discuss 5 different types of research contributions, as well as 4 competency themes that capture the skills relevant to visualization literacy. Abstract Research in visualization literacy explores the skills required to engage with visualizations.
Matthew Varona +6 more
wiley +1 more source
Children &Society, EarlyView.ABSTRACT While researchers continue to make significant scholarly inroads toward the acknowledgment of Black children's agency and competencies, including their recognition of and resistance to systemic racism, practical guides to anti‐racist qualitative research with young Black children factor conspicuously less often into the contextual balance of ...
Kerry‐Ann Escayg +2 more
wiley +1 more source