Expected value, to a point: Moral decision‐making under background uncertainty
Noûs, EarlyView.Abstract Expected value maximization gives plausible guidance for moral decision‐making under uncertainty in many situations. But it has unappetizing implications in ‘Pascalian’ situations involving tiny probabilities of extreme outcomes. This paper shows, first, that under realistic levels of ‘background uncertainty’ about sources of value independent
Christian Tarsney
wiley +1 more source
Visionaries and Crackpots, Maniacs and Saints: Existential Risk and the Politics of Longtermism
Ratio, EarlyView.ABSTRACT Despite advancing strong claims about our collective priorities, longtermism has received little attention in debates in political philosophy. I first provide an account of longtermism that highlights the way it departs from established work on intergenerational justice.
Alex McLaughlin
wiley +1 more source
Studying Magnetic Reconnection with Synchrotron Polarization Statistics
The Astrophysical JournalMagnetic reconnection is a fundamental process for releasing magnetic energy in space physics and astrophysics. At present, the usual way to investigate the reconnection process is through analytical studies or first-principle numerical simulations. This
Jian-Fu Zhang +2 more
doaj +1 more source
PROBING X-RAY ABSORPTION AND OPTICAL EXTINCTION IN THE INTERSTELLAR MEDIUM USING CHANDRA OBSERVATIONS OF SUPERNOVA REMNANTS [PDF]
, 2015 We present a comprehensive study of interstellar X-ray extinction using the extensive Chandra supernova remnant (SNR) archive and use our results to refine the empirical relation between the hydrogen column density and optical extinction. In our analysis,
Dillon R. Foight +3 more
semanticscholar +1 more source
Revealing the Spectral Properties of Magnetic Turbulence by Synchrotron Polarization Gradients
The Astrophysical JournalBased on the modern understanding of MHD turbulence theory, we propose a new method for measuring the spectral properties of magnetic turbulence by synchrotron polarization gradient analysis.
Jian-Fu Zhang, Zi-Qi Liu
doaj +1 more source
Mapping the interstellar medium in galaxies with Herschel/SPIRE [PDF]
, 2010 The standard method of mapping the interstellar medium in a galaxy, by observing the molecular gas in the CO 1-0 line and the atomic gas in the 21-cm line, is largely limited with current telescopes to galaxies in the nearby universe.
Bock, J. J. +4 more
core
Equation of motion of an interstellar Bussard ramjet with radiation and mass losses
, 2007 An interstellar Bussard ramjet is a spaceship using the protons of the interstellar medium in a fusion engine to produce thrust. In recent papers, it was shown that the relativistic equation of motion of an ideal ramjet and of a ramjet with radiation ...
Abramowitz +11 more
core +5 more sources
Is turbulence in the interstellar medium driven by feedback or gravity? An observational test [PDF]
, 2015 Galaxies' interstellar media (ISM) are observed to be supersonically turbulent, but the ultimate power source that drives turbulent motion remains uncertain. The two dominant models are that the turbulence is driven by star formation feedback and/or that
M. Krumholz, B. Burkhart
semanticscholar +1 more source
, 2013 Many evolved stars travel through space at supersonic velocities, which leads to the formation of bow shocks ahead of the star where the stellar wind collides with the interstellar medium (ISM).
Decin, Leen +2 more
core +3 more sources
Reaction Kinetics of NH2 With H2CO and CH3CHO: Modeling Implications for NH3‐Dual Fuel Blends
International Journal of Chemical Kinetics, Volume 57, Issue 7, Page 403-416, July 2025.ABSTRACT Carbon‐free fuels like ammonia (NH3) and hydrogen (H₂) offer significant potential in combating global warming by reducing greenhouse gas emissions and moving toward zero carbon emissions. Over the past few years, our research has focused on understanding the combustion behavior of carbon‐neutral and carbon‐free fuels.
Krishna Prasad Shrestha +8 more
wiley +1 more source