Results 121 to 130 of about 406,699 (273)

Medical Lysenkoism

Journal of Evaluation in Clinical Practice, Volume 31, Issue 5, August 2025.
Abstract Medicine is a compound field composed of science and art. The (necessary) degree to which the latter is involved opens medicine, in particular, to the introduction of ideas which do not, by their very nature, submit to confirmation or confutation as do the various methods of traditional science.
Steven K. Baker
wiley   +1 more source

Unity of Cosmological Inflation Attractors

Physical Review Letters, 2015
Recently, several broad classes of inflationary models have been discovered whose cosmological predictions, in excellent agreement with Planck, are stable with respect to significant modifications of the inflaton potential. Some classes of models are based on a nonminimal coupling to gravity. These models, which we call ξ attractors, describe universal
Renata Kallosh, Diederik Roest, Andrei Linde, Mario Galante   +3 more
openaire   +4 more sources

Stability of Accelerating Cosmology in Two Scalar-Tensor Theory: Little Rip <em>versus</em> de Sitter

Entropy, 2012
We develop the general reconstruction scheme in two scalar model. The quintom-like theory which may describe (different) non-singular Little Rip or de Sitter cosmology is reconstructed.
Yusaku Ito, Shin’ichi Nojiri, Sergei D. Odintsov   +2 more
doaj   +1 more source

Non-singular Power-law and Assisted inflation in Loop Quantum Cosmology [PDF]

, 2012
We investigate the dynamics of single and multiple scalar fields with exponential potentials, leading to power-law and assisted inflation, in loop quantum cosmology.
Evan Ranken, Parampreet Singh
semanticscholar   +1 more source

Energy Storage and Environmental Justice: A Critical Examination of a Proposed Pumped Hydropower Facility in Goldendale, Washington

Antipode, Volume 57, Issue 4, Page 1236-1258, July 2025.
Abstract Renewable energy sources such as solar and wind produce electricity intermittently, creating challenges in balancing electricity supply and demand for increasingly renewable‐dominated grids. This is driving efforts to increase energy storage infrastructure, such as pumped hydroelectric power storage (pumped storage).
Alida Cantor, Bethani Turley, Katie Maxfield   +2 more
wiley   +1 more source

INFLATION AS AN ATTRACTOR IN SCALAR COSMOLOGY [PDF]

Modern Physics Letters A, 2013
We study an inflation mechanism based on attractor properties in cosmological evolutions of a spatially flat Friedmann–Robertson–Walker spacetime based on the Einstein-scalar field theory. We find a new way to get the Hamilton–Jacobi equation solving the field equations.
openaire   +4 more sources

Inflation from Extra Dimensions

, 1994
A gravity-driven inflation is shown to arise from a simple higher dimensional universe. In vacuum, the shear of $n>1$ contracting dimensions is able to inflate the remaining three spatial dimensions.
Abbott, Behrndt, Behrndt, Bergmann, Brans, Brustein, Chodos, Coley, Copeland, Dicke, Freese, Gasperini, Gasperini, Ishihara, Janna J Levin, Jordan, Kaluza, Kasner, Klein, Kolb, Kolb, Levin, Moorhouse, Sadhev, Veneziano, Wagoner   +25 more
core   +1 more source

Variation of Model‐Predicted Reconnection Voltages Applied to Uranus' Dayside Magnetosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 6, June 2025.
Abstract Uranus provides a key missing piece for fundamentally understanding solar wind‐magnetospheric interactions due to its location in the outer solar system. Whether the viscous‐like interaction overtakes global magnetic reconnection as the dominant process at the magnetopause of the outer planets remains unresolved.
S. Zomerdijk‐Russell, J. M. Jasinski, A. Masters   +2 more
wiley   +1 more source

Cosmological inflation

, 2012
The very basics of cosmological inflation are discussed. We derive the equations of motion for the inflaton field, introduce the slow-roll parameters, and present the computation of the inflationary perturbations and their connection to the temperature fluctuations of the cosmic microwave background.
openaire   +2 more sources

Lectures on string theory and cosmology

, 2004
In these lectures I review recent attempts to apply string theory to cosmology, including string cosmology and various models of brane cosmology. In addition, the review includes an introduction to inflation as well as a discussion of transplanckian ...
Albrecht A Kaloper N Song Y S, Allen B, Bak D, Banks T, Banks T, Banks T Fischler W, Banks T Fischler W, Banks T Susskind L, Bekenstein J D, Bergström L, Bousso R, Bousso R, Bousso R, Bousso R, Bozza V, Brandenberger R H, Burgess C P, Chernikov N A, Danielsson U H, Danielsson U H, Danielsson U H, Danielsson U H, Danielsson U H, de Boer J, DeWolfe O, Dvali G R Shafi Q Solganik S, Dyson L, Dyson L, Easther R, Fischler W, Fischler W Susskind L, Frolov A, Gasperini M, Gibbons G W, Giddings S B, Goldstein K, Grishchuk L P, Grishchuk L P, Guth A H, Hellerman S, Horowitz G T, Kachru S, Kachru S, Kaloper N, Kaloper N, Keski-Vakkuri E, Kiefer C, Kruczenski M, Liddle A R, Linde A, Linde A, Linde A, Martin J, Martin J, Mottola E, Myung Y S, Okamoto T, Polarski D, Polchinski J, Prokopec T, Quevedo F, Sato K, Schalm K, Schiffer M, Starobinsky A A, Starobinsky A A, Starobinsky A A, Steinhardt P J Turok N, Susskind L, Susskind L, Susskind L, Turok N, Ulf H Danielsson, Witten E, Witten E   +74 more
core   +2 more sources