Results 91 to 100 of about 60,199 (278)

ASYMPTOTICS OF LINEARIZED COSMOLOGICAL PERTURBATIONS [PDF]

Journal of Hyperbolic Differential Equations, 2010
In cosmology an important role is played by homogeneous and isotropic solutions of the Einstein–Euler equations and linearized perturbations of these. This paper proves results on the asymptotic behavior of scalar perturbations both in the approach to the initial singularity of the background model and at late times. The main equation of interest is a
Allen, P., Rendall, A.
openaire   +3 more sources

Sampling the volcanic plumes at Io: Impact speeds and shock conditions

Meteoritics &Planetary Science, EarlyView.
Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz   +2 more
wiley   +1 more source

Alfven modes driven non-linearly by metric perturbations in anisotropic magnetized cosmologies

, 2007
We consider anisotropic magnetized cosmologies filled with conductive plasma fluid and study the implications of metric perturbations that propagate parallel to the ambient magnetic field.
APOSTOLOS KUIROUKIDIS, DEMETRIOS B. PAPADOPOULOS, Kokkotas K. D., KOSTAS KLEIDIS, Moortgat J., Ruzmaikina T. V., Zel'dovich Ya B.   +6 more
core   +1 more source

THE FATHERS, COMPUTERS AND US

Modern Theology, EarlyView.
Abstract This essay, designed as a complement to opinions expressed by Rowan Williams and some speakers at the conference in his honour, explores features of early Christianity which suggest a positive evaluation of artificial intelligence. Noting that the fear of reducing humans to machines has been joined in the modern age by the fear that machines ...
Mark J. Edwards
wiley   +1 more source

Cosmological tensor perturbations in the Randall-Sundrum model: evolution in the near-brane limit

, 2003
We discuss the evolution of cosmological tensor perturbations in the RSII model. In Gaussian normal coordinates the wave equation is non-separable, so we use the near-brane limit to perform the separation and study the evolution of perturbations. Massive
Battye, R. A., Mennim, A., van de Bruck, C.   +2 more
core   +1 more source

Scalar Cosmological Perturbations

, 2020
In this paper we present the study of the scalar cosmological perturbations of a single field inflationary model up to first order in deviation. The Christoffel symbols and the tensorial quantities are calculated explicitly in function of the cosmic time t.
Tapia, Truman, Rojas, Clara
openaire   +2 more sources

Jungian categories as modes of reading: The case of Graham Greene's The Heart of the Matter and Aldous Huxley's Time Must Have a Stop

Orbis Litterarum, EarlyView.
Abstract This essay advocates renewed attention toward Jungian literary criticism, emphasizing its unique and creative perspectives on both fictional worlds and on reading. A fresh turn to Jungian criticism offers, in particular, valuable insight for texts on the peripheries of the canon.
Edsel Parke
wiley   +1 more source

PSR, Modal Collapse, and Open Future in Ibn Sīnā's Philosophy

Theoria, EarlyView.
ABSTRACT It has been contended that the Principle of Sufficient Reason (PSR) implies necessitarianism—that is, the view that everything occurs out of necessity. Discussing a well‐known argument for this claim developed by contemporary metaphysicians, I show that Ibn Sīnā has anticipated a counterpart of this argument, and that is precisely why he is ...
Mohammad Saleh Zarepour
wiley   +1 more source

A cosmological Higgs collider

Journal of High Energy Physics, 2020
The quantum fluctuations of the Higgs field during inflation could be a source of primordial density perturbations through Higgs-dependent inflaton decay.
Shiyun Lu, Yi Wang, Zhong-Zhi Xianyu
doaj   +1 more source

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