Results 121 to 130 of about 22,410,258 (325)
General mechanism for producing scale-invariant perturbations and small non-Gaussianity in ekpyrotic models [PDF]
, 2014 We explore a new type of entropic mechanism for generating density perturbations in a contracting phase in which there are two scalar fields, but only one has a steep negative potential.
Anna Ijjas, J. Lehners, P. Steinhardt
semanticscholar +1 more source
Natural Frequencies of Levodopa‐Induced Dyskinesia in Parkinson's Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objectives Abnormal involuntary movements, known as dyskinesias, are common complications of levodopa treatment in patients with Parkinson's disease and can significantly impair quality of life. The underlying pathophysiology remains unclear, and current therapeutic options are limited.
Ioannis U. Isaias +3 more
wiley +1 more source
MCMC generation of cosmological fields far beyond Gaussianity
The Open Journal of Astrophysics, 2021 Structure formation in our Universe creates non-Gaussian random fields that will soon be observed over almost the entire sky by the Euclid satellite, the Vera-Rubin observatory, and the Square Kilometre Array.
Joey R. Braspenning, Elena Sellentin
doaj +1 more source
Radio galaxy populations and the multitracer technique: pushing the limits on primordial non-Gaussianity [PDF]
, 2014 We explore the use of different radio galaxy populations as tracers of different mass halos and therefore, with different bias properties, to constrain primordial nonGaussianity of the local type.
L. Ferramacho +3 more
semanticscholar +1 more source
Primordial non-Gaussianity and reionization
Physical Review D, 2013 18 pages, 11 ...
Lidz, Adam +3 more
openaire +3 more sources
Stage‐Dependent β‐Synuclein Links MRI and Cognitive Decline in Alzheimer's Disease
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Synaptic degeneration drives cognitive decline in Alzheimer's disease (AD), but synaptic biomarkers are scarce. Brain‐enriched β‐synuclein emerged as a synaptic damage marker. We investigated its diagnostic, prognostic, and structural correlates across the AD continuum.
Ulaş Ay +15 more
wiley +1 more source
How well do we know the scalar-induced gravitational waves?
Physics Letters BGravitational waves sourced by amplified scalar perturbations are a common prediction across a wide range of cosmological models. These scalar curvature fluctuations are inherently nonlinear and typically non-Gaussian.
A.J. Iovino +4 more
doaj +1 more source
Taking into account the rate of convergence in CLT under Risk evaluation on financial markets
Cogent Economics & Finance, 2017 This paper examines “fat tails puzzle” in the financial markets. Ignoring the rate of convergence in Central Limit Theorem (CLT) provides the “fat tail” uncertainty.
Levon Kazaryan, Gregory Kantorovich
doaj +1 more source
Adiabatic versus isocurvature non-Gaussianity
, 2010 We study the extent to which one can distinguish primordial non-Gaussianity (NG) arising from adiabatic and isocurvature perturbations. We make a joint analysis of different NG models based on various inflationary scenarios: local-type and equilateral ...
Munshi, Dipak +7 more
core +1 more source
Consistency relations for non-Gaussianity
Journal of Cosmology and Astroparticle Physics, 2008 We investigate consistency relations for non-Gaussianity. We provide a model-independent dynamical proof for the consistency relation of 3-point correlation functions from the Hamiltonian and field redefinition. This relation can be applied to single field inflation, multi-field inflation and the curvaton scenario. This relation can also be generalized
Li, Miao, Wang, Yi
openaire +3 more sources