Results 61 to 70 of about 105,573 (267)

The futuristic manifolds of REM sleep

Journal of Sleep Research, Volume 34, Issue 2, April 2025.
Summary Since one of its first descriptions 70 years ago, rapid eye movement sleep has continually inspired and excited new generations of sleep researchers. Despite significant advancements in understanding its neurocircuitry, underlying mechanisms and microstates, many questions regarding its function, especially beyond the early neurodevelopment ...
Liborio Parrino, Ivana Rosenzweig
wiley   +1 more source

Positron transport in the interstellar medium [PDF]

Astronomy & Astrophysics, 2009
We seek to understand the propagation mechanisms of positrons in the interstellar medium (ISM). This understanding is a key to determine whether the spatial distribution of the annihilation emission observed in our Galaxy reflects the spatial distribution of positron sources and, therefore, makes it possible to place constraints on the origin of ...
K. Ferrière, P. Jean, Alexandre Marcowith, W. Gillard, W. Gillard, W. Gillard   +5 more
openaire   +4 more sources

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, Bernard Silvestre-Brac, Bussard, Claude Semay, Fishback, Mallove, Marx, Matloff, Nahin, Sears, Semay, Semay   +11 more
core   +5 more sources

Eyes in the sky: Interactions between AGB winds and the interstellar magnetic field [PDF]

, 2014
We aim to examine the role of the interstellar magnetic field in shaping the extended morphologies of slow dusty winds of Asymptotic Giant-branch (AGB) stars in an effort to pin-point the origin of so-called eye shaped CSE of three carbon-rich AGB stars.
Cox, N. L. J., Decin, L., van Marle, A. J.   +2 more
core   +1 more source

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

Measurement of Interstellar Magnetization by Synchrotron Polarization Variance

The Astrophysical Journal
Since synchrotron polarization fluctuations are related to the fundamental properties of the magnetic field, we propose the polarization intensity variance to measure the Galactic interstellar medium (ISM) magnetization.
Ning-Ning Guo, Jian-Fu Zhang, Hua-Ping Xiao, Jungyeon Cho, Xue-Juan Yang   +4 more
doaj   +1 more source

Interstellar dust within the life cycle of the interstellar medium

EPJ Web of Conferences, 2012
Cosmic dust is omnipresent in the Universe. Its presence influences the evolution of the astronomical objects which in turn modify its physical and chemical properties.
Demyk K.
doaj   +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

Applications of Abundance Data and Requirements for Cosmochemical Modeling [PDF]

, 2001
Understanding the evolution of the universe from Big Bang to its present state requires an understanding of the evolution of the abundances of the elements and isotopes in galaxies, stars, the interstellar medium, the Sun and the heliosphere, planets and
Binns, W. R., Busemann, H., Chiappini, C., Gloeckler, G., Hoppe, P., Kirilova, D., Leske, R. A., Manuel, O. K., Mewaldt, R. A., Möbius, E., Wieler, R., Wiens, R. C., Wimmer-Schweingruber, R. F., Yanasak, N. E.   +13 more
core   +2 more sources

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source