Results 61 to 70 of about 58,534 (245)

COSMOLOGICAL PERTURBATIONS AND THE RUNNING COSMOLOGICAL CONSTANT MODEL [PDF]

International Journal of Modern Physics D, 2012
We study the matter density fluctuations in the running cosmological constant (RCC) model using linear perturbations in the longitudinal gauge. Using this observable, we calculate the growth rate of structures and the matter power spectrum, and compare these results to SDSS data and the available data for linear growth rate.
openaire   +2 more sources

Centring care as part of Indigenous environmental stewardship: Collective learning through cultural plants

People and Nature, EarlyView.
Abstract Stewardship is broadly defined as ‘universal responsibility of humanity to care for the planet, to ensure that it can continue to provide the essential natural resources for life’. Stewardship practices shape ecosystems, create diverse biocultural landscapes, and can enhance the productivity, availability and health of plants used by ...
Megan Mucioki, Michelle Baumflek, Suzanne Greenlaw, Helen Aderman, Kathy McCovey, Frank K. Lake, Davin Holen, Jennifer Sowerwine, Daniel Sarna‐Wojcicki, Bronwen Powell   +9 more
wiley   +1 more source

Effective Field Theory of Cosmological Perturbations

, 2013
The effective field theory of cosmological perturbations stems from considering a cosmological background solution as a state displaying spontaneous breaking of time translations and (adiabatic) perturbations as the related Nambu-Goldstone modes.
Piazza, Federico, Vernizzi, Filippo
core   +3 more sources

Evolution of Nonlinear Cosmological Perturbations

Physical Review Letters, 2005
We define fully non-perturbative generalizations of the uniform density and comoving curvature perturbations, which are known, in the linear theory, to be conserved on sufficiently large scales for adiabatic perturbations. Our non-linear generalizations are defined geometrically, independently of any coordinate system.
Langlois, David, Vernizzi, F.
openaire   +4 more sources

The Age and Origin of Block Deposits in the Victorian Alps, Australia

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Large periglacial block deposits are found in the mountains of southeastern Australia. Despite their widespread distribution, their mode of formation and age are poorly understood. These landforms hold considerable potential to shed light on the nature of cooling during glacial periods. In this paper we present a new study of block deposits in
Timothy T. Barrows, Michelle S. Worland, Julian Murton, Stephanie C. Mills, L. Keith Fifield   +4 more
wiley   +1 more source

SCALAR COSMOLOGICAL PERTURBATIONS OF PRESSURELESS MATTER IN THE BRANEWORLD MODEL

Odessa Astronomical Publications, 2012
We present a complete set of differential equations describing the evolution of scalar cosmological perturbations of pressureless matter on the brane in the general case where the action of the model contains the induced-curvature term as well as the ...
A. V. Viznyuk, Yu. V. Shtanov
doaj   +1 more source

On the ghost issue of extended quasidilaton

, 2017
We report on our independent investigations of the puzzle of cosmological perturbations in extended quasidilaton. We confirm the claims of presence of the Boulware-Deser ghost.
Golovnev, Alexey, Trukhin, Aleksandr
core   +1 more source

Illegal Gold Mining in the Brazilian Amazon: Environmental Degradation in Yanomami Indigenous Lands, and Regulatory Failures

Sustainable Development, EarlyView.
ABSTRACT Illegal gold mining has emerged as a major sustainability threat in the Amazon, eroding Indigenous rights, forest integrity, and climate mitigation efforts. This study examines how international market incentives relate to the expansion of illegal mining and associated deforestation within the Yanomami Indigenous Territory (YIT) from 2008 to ...
Shirléia Lago Santos, Ana Claudia de Araujo Moxotó, Jurandir Moura Dutra   +2 more
wiley   +1 more source

Extra polarization states of cosmological gravitational waves in alternative theories of gravity

, 2010
Cosmological Gravitational Waves (GWs) are usually associated with the transverse-traceless part of the metric perturbations in the context of the theory of cosmological perturbations. These modes are just the usual polarizations `+' and `x' which appear
Alves M E S Miranda O D de Araujo J C N, Bessada D, Corda C, de Paula W L S, Durrer R, Grishchuk L P, Grishchuk L P, J C N de Araujo, Lifshiftz E M, Lifshiftz E M, M E S Alves, O D Miranda, Peebles P J E, Rosen N, Weinberg S, Will C M, Will C M, Zakharov V I   +17 more
core   +1 more source

Integrating multimodal data and machine learning for entrepreneurship research

Strategic Entrepreneurship Journal, EarlyView.
Abstract Research Summary Extant research in neuroscience suggests that human perception is multimodal in nature—we model the world integrating diverse data sources such as sound, images, taste, and smell. Working in a dynamic environment, entrepreneurs are expected to draw on multimodal inputs in their decision making.
Yash Raj Shrestha, Vivianna Fang He
wiley   +1 more source