Results 101 to 110 of about 71,531 (348)

Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky. [PDF]

Nat Astron, 2023
Goobar A, Johansson J, Schulze S, Arendse N, Carracedo AS, Dhawan S, Mörtsell E, Fremling C, Yan L, Perley D, Sollerman J, Joseph R, Hinds KR, Meynardie W, Andreoni I, Bellm E, Bloom J, Collett TE, Drake A, Graham M, Kasliwal M, Kulkarni SR, Lemon C, Miller AA, Neill JD, Nordin J, Pierel J, Richard J, Riddle R, Rigault M, Rusholme B, Sharma Y, Stein R, Stewart G, Townsend A, Vinko J, Wheeler JC, Wold A.   +37 more
europepmc   +1 more source

When Darwin Met Einstein: Gravitational Lens Inversion with Genetic Algorithms

, 2005
Gravitational lensing can magnify a distant source, revealing structural detail which is normally unresolvable. Recovering this detail through an inversion of the influence of gravitational lensing, however, requires optimisation of not only lens ...
Bailer-Jones, Bobinger, Brendon J. Brewer, Cohen, Darwin, Dye, Geraint F. Lewis, Gómez de Castro, Hakala, Kochanek, Levy, Press, Wayth   +12 more
core   +2 more sources

Stance and Gait Analysis of Apollo Astronauts on the Moon

Muscle &Nerve, EarlyView.
ABSTRACT Introduction/Aim As humans return to the Moon, safe efficient ambulation and fall prevention on the lunar surface are key concerns. The analysis of gait from archived Apollo mission video footage is now possible with pose estimation video analysis software.
Faye Y. Chiou‐Tan, Conrad Li, Jason P. Caffrey, Millard Reschke, Timothy R. Macaulay   +4 more
wiley   +1 more source

RXJ0437+00: Constraining Dark Matter with Exotic Gravitational Lenses [PDF]

, 2023
David Lagattuta, Johan Richard, H. Ebeling, Quentin Basto, Catherine Cerny, A. C. Edge, Mathilde Jauzac, Guillaume Mahler, R. Massey   +8 more
openalex   +1 more source

The quadrupole gravitational lens

The Astrophysical Journal, 1987
An asymmetric lens made of a spherically symmetric galaxy and a quadrupole tidal part allows a very simple pictorial examination of the multiplicity and positions of the images, for any mass density profile. The lens equations can be reduced to one equation in one variable.
openaire   +1 more source

Anisotropy Analysis of Bamboo and Tooth Using 4‐Angle Polarization Micro‐Spectroscopy

Nano Select, EarlyView.
Super‐resolution via orientation: spatial distribution of specific molecular vibrations are revealed at 1/20 of the diffraction limit. ABSTRACT To investigate the anisotropic properties of biomaterials, two distinct classes are considered as follows: polymer‐based (cellulose in plants) and crystalline‐based (enamel in teeth), each demonstrating ...
Meguya Ryu, Hsin‐Hui Huang, Jitraporn Vongsvivut, Soon Hock Ng, Irma Dumbrytė, Donatas Narbutis, Mangirdas Malinauskas, Saulius Juodkazis, Junko Morikawa   +8 more
wiley   +1 more source

A Methodological Framework to Study Change in Team Cognition Under the Dynamical Hypothesis

Topics in Cognitive Science, EarlyView., 2023
Abstract The dynamical hypothesis claims that cognitive systems, such as teams, are dynamical systems (i.e., an interdependent collection of individuals and their technology that change together over time). Following this hypothesis, team researchers have adopted dynamical approaches to better understand the team cognitive processes and states that ...
Kyana van Eijndhoven, Travis J. Wiltshire, Elwira A. Hałgas, Josette M. P. Gevers   +3 more
wiley   +1 more source

Analogue gravitational lensing in optical Bose-Einstein condensates [PDF]

, 2021
Decheng Ma, Chenglong Jia, E. Solano, Lucas C. Céleri   +3 more
openalex   +1 more source

Cosmological Gravitational Lens Equation [PDF]

Progress of Theoretical Physics, 1993
Based on the geometric optics in curved spacetime, we investigate the validity and limitation of the cosmological gravitational lens equation in detail. We first review the conventional derivation of the lens equation which relies on an intuitive construction of the lens geometry, and point out ambiguities in the resulting formula when applied to ...
openaire   +1 more source

Friction Shock Absorbers and Reverse Thrust for Fast Multirotor Landing on High‐Speed Vehicles

Journal of Field Robotics, EarlyView.
ABSTRACT Typical landing gears of small uninhabited aerial vehicles (UAV) limit their capability to land on vehicles moving at more than 20–50 km/h due to high drag forces, high pitch angles and potentially high relative horizontal velocities. To enable landing at higher speeds, a combination of lightweight friction shock absorbers and reverse thrust ...
Isaac Tunney, John Bass, Alexis Lussier Desbiens   +2 more
wiley   +1 more source