Results 141 to 150 of about 786,932 (316)
Gravitational Lenses and Cosmological Evolution [PDF]
Symposium - International Astronomical Union, 1982 Empirical descriptions of cosmological evolution rely on an assumed relation between luminosity distance and redshift in order to derive the luminosity function and its epoch dependence. This relation is usually taken to be that of an idealised Friedmann cosmology, despite the obvious abundance of small-scale structure in the Universe.
openaire +4 more sources
Evaluation of video evidence of possible ball lightning
Quarterly Journal of the Royal Meteorological Society, EarlyView.We analyze images of possible ball lightning that appeared less than 10 m from a video camera. The objects' velocity and estimated brightness all agree with typical eyewitness accounts of ball lightning. Though there is an alternative explanation that the objects were sparks from a power‐line arc, we describe analytical techniques that assist in ...
K. Stephan, R. Sonnenfeld, J. Bertoloni
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 +3 more
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On the Possibility of Determining Hubble's Parameter and the Masses of Galaxies from the Gravitational Lens Effect [PDF]
, 1964 S. Refsdal
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Journal of Field Robotics, EarlyView.ABSTRACT Recently, there has been a surge of international interest in extraterrestrial exploration targeting the Moon, Mars, the moons of Mars, and various asteroids. This contribution discusses how current state‐of‐the‐art Earth‐based testing for designing rovers and landers for these missions currently leads to overly optimistic conclusions about ...
Wei Hu +6 more
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3C 268.4 -- Evidence for the Presence of a Gravitationally-Lensed Secondary Image [PDF]
, 1976 N. Sanitt
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Gravitational lensing around Kehagias–Sfetsos compact objects surrounded by plasma
European Physical Journal C: Particles and Fields, 2019 We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter $$\omega _{_{KS}}$$ ωKS , in the presence of plasma, considering its homogeneous or power-law density distribution.
Sudipta Hensh +3 more
doaj +1 more source
Sustainable Development, EarlyView.ABSTRACT Reverse logistics (RL) aims to direct demolition waste (DW) away from landfills towards alternative uses by converting it into reprocessed construction materials (RCMs). However, recent studies indicate that the uptake of RCMs remains limited, adversely affecting the effectiveness of RL for DW. Therefore, developing markets for these materials
Gihan Anuradha Tennakoon +2 more
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Astrophysics: Gravitational lenses and the missing mass [PDF]
, 1983 J. A. Peacock
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Systems Research and Behavioral Science, EarlyView.ABSTRACT The emergence of cooperation in natural selection has been successfully studied using game theory and, despite the underlying selfish nature of the evolutionary process, a spectrum of plausible mechanisms have been proposed to determine the conditions under which cooperative behaviour is likely to occur.
Phil Mercy, Martin Neil
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