Results 111 to 120 of about 896,961 (328)

Viscous warm inflation: Hamilton–Jacobi formalism [PDF]

Astroparticle Physics, 2017
Using Hamilton-Jacobi formalism, The scenario of warm inflation with viscous pressure is considered. The formalism gives a way of computing the slow-rolling parameters without extra approximation, and it is well-known as a powerful method in cold inflation.
Akhtari, L., Mohammadi, A., Sayar, K., Saaidi, Kh.   +3 more
openaire   +2 more sources

Longitudinal links of negative student–teacher relationships and positive class climate with traditional bullying and cyberbullying perpetration

British Educational Research Journal, EarlyView.
Abstract The current study aimed to investigate whether negative student–teacher relationships and within‐class perceptions of the class climate at the individual level, and positive class climates at the classroom level in fifth grade, were associated with traditional bullying and cyberbullying perpetration 1 year later, in sixth grade, in a sample of
Robert Thornberg, Björn Sjögren, Jun Sung Hong, Claudio Longobardi   +3 more
wiley   +1 more source

Warming up the fibres

Journal of High Energy Physics
Fibre inflationary models are constructed in type-IIB string flux compactification. These models have been shown to be in agreement with the cosmological observations under appropriate choices of parameters, which originate from their string theory ...
Dibya Chakraborty, Rudnei O. Ramos
doaj   +1 more source

Warm tachyonic inflation in warped background

, 2009
We analyze warm tachyonic inflation, proposed in the literature, but from the viewpoint of four dimensional effective action for tachyon field on a non-BPS D3-brane. We find that consistency with observational data on density perturbation and validity of
ATRI DESHAMUKHYA, Bergshoeff E. A., Chingangbam P., Herrera R., Hertzberg M. P., Klebanov I. R., Kofman L., Raeymaekers J., Sen A., SUDHAKAR PANDA   +9 more
core   +1 more source

Toward a magnetic warm inflation scenario [PDF]

, 2022
Gabriella Piccinelli, Ángel Sánchez
openalex   +1 more source

The spread of non‐native species

Biological Reviews, EarlyView.
ABSTRACT The global redistribution of species through human agency is one of the defining ecological signatures of the Anthropocene, with biological invasions reshaping biodiversity patterns, ecosystem processes and services, and species interactions globally.
Phillip J. Haubrock, Ali Serhan Tarkan, Irene Martín‐Forés, Stelios Katsanevakis, Ronaldo Sousa, Ismael Soto, Andy J. Green, Antonín Kouba, Teun Everts, Victoria Dominguez Almela, Nadège Belouard, Cang Hui, Jamie Bojko, Victor Deklerck, Margaux Boeraeve, Franz Essl, J. Robert Britton   +16 more
wiley   +1 more source

Two-field Warm Inflation and Its Scalar Perturbations on Large Scales

, 2018
We explore the homogeneous background dynamics and the evolution of generated perturbations of cosmological inflation that is driven by multiple scalar fields interacting with a perfect fluid.Then we apply the method to warm inflation driven by two ...
Wang, Yang-Yang, Zhang, Xiao-Min, Zhu, Jian-Yang   +2 more
core   +1 more source

The myth of the metabolic baseline: sleep–wake cycles undermine a foundational assumption in organismal biology

Biological Reviews, EarlyView.
ABSTRACT Basal and standard metabolic rate (BMR and SMR) are cornerstones of physiological ecology and are assumed to be relatively fixed intrinsic properties of organisms that represent the minimum energy required to sustain life. However, this assumption is conceptually flawed. Many core maintenance processes underlying SMR are temporally partitioned
Helena Norman, Daphne Cortese, Amelia Munson, Jan Lindström, Shaun S. Killen   +4 more
wiley   +1 more source

Coupled Quintessence Inspired by Warm Inflation

Universe
We investigate a coupled quintessence cosmological model in which a dark-energy scalar field with an exponential potential interacts directly with a dark-matter fluid through a dissipative term inspired by warm inflation.
Paulo M. Sá
doaj   +1 more source

Early evolutionary history of the seed

Biological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source