Results 61 to 70 of about 663,607 (334)
occumb: An R package for site occupancy modeling of eDNA metabarcoding data
Population Ecology, EarlyView.This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley +1 more source
Inflationary f (R) Cosmologies
Universe, 2017 This paper discusses a simple procedure to reconstruct f ( R ) -gravity models from exact cosmological solutions of the Einstein field equations with a non-interacting classical scalar field-and-radiation background.
Heba Sami +2 more
doaj +1 more source
Gravitation in Unified Scalar Field Theory
Universe, 2021 The scalar field of space-time film is considered as unified fundamental field. The field model under consideration is the space-time generalization of the model for a two-dimensional thin film.
Alexander A. Chernitskii
doaj +1 more source
Noncommutativity and scalar field cosmology [PDF]
Physical Review D, 2007 4 Pages, 2 figures, Revtex ...
M. Sabido +3 more
openaire +2 more sources
Generalized second law of thermodynamics in scalar-tensor gravity
, 2014 Within the context of scalar-tensor gravity, we explore the generalized second law (GSL) of gravitational thermodynamics. We extend the action of ordinary scalar-tensor gravity theory to the case in which there is a non-minimal coupling between the ...
Abdolmaleki, A., Karami, K., Najafi, T.
core +1 more source
Population Ecology, EarlyView.We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva +6 more
wiley +1 more source
Einstein-aether theory in Weyl integrable geometry
European Physical Journal C: Particles and Fields, 2020 We study the Einstein-aether theory in Weyl integrable geometry. The scalar field which defines the Weyl affine connection is introduced in the gravitational field equation.
Andronikos Paliathanasis +2 more
doaj +1 more source
Zero-dimensional models for gravitational and scalar QED decoherence
New Journal of Physics, 2022 We investigate the dynamics of two quantum mechanical oscillator system–bath toy models obtained by truncating to zero spatial dimensions linearized gravity coupled to a massive scalar field and scalar quantum electrodynamics (QED).
Qidong Xu, M P Blencowe
doaj +1 more source
Black holes and scalar fields [PDF]
Classical and Quantum Gravity, 2015 No-hair theorems in theories of gravity with a scalar field are briefly and critically reviewed. Their significance and limitations are discussed and potential evasions are considered.
openaire +5 more sources
Reformulating scalar–tensor field theories as scalar–scalar field theories using a novel geometry
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2022 In this paper, I shall show how the notions of Finsler geometry can be used to construct a similar geometry using a scalar field, f , on the cotangent bundle of a differentiable manifold M . This will enable me to use the second vertical derivatives of f , along with ...
openaire +3 more sources