Results 21 to 30 of about 15,943 (261)

O viés doméstico no comércio interestadual de produtos florestais no Brasil Domestic bias in the forest product interstate trade in Brazil

open access: yesRevista Árvore, 2009
Este estudo procurou estimar o efeito doméstico do comércio entre os estados brasileiros, utilizando-se dados sobre as atividades do setor florestal de acordo com a classificação nacional de atividades econômicas fiscais (CNAE-F).
Orlando Monteiro da Silva   +1 more
doaj   +1 more source

A Dynamic Network Comparison Analysis of Iran’s Crude Oil International Trade [PDF]

open access: yesPizhūhishnāmah-i Iqtiṣād-i Inirzhī-i Īrān, 2019
This research conducts a quantitative comparative analysis of the dynamic international crude oil trade network of Iran by using the network connectedness measures of Diebold and Yilmaz (2015) and also the asymmetric short-term and long-term impact of ...
Masoud Shirazi   +4 more
doaj   +1 more source

Fluid-gravity correspondence in the scalar-tensor theory of gravity: (in)equivalence of Einstein and Jordan frames

open access: yesJournal of High Energy Physics, 2020
The duality of gravitational dynamics (projected on a null hypersurface) and of fluid dynamics is investigated for the scalar tensor (ST) theory of gravity. The description of ST gravity, in both Einstein and Jordan frames, is analyzed from fluid-gravity
Krishnakanta Bhattacharya   +2 more
doaj   +1 more source

The Quantization of Gravity: Quantization of the Hamilton Equations [PDF]

open access: yesUniverse, 2021
We quantize the Hamilton equations instead of the Hamilton condition. The resulting equation has the simple form −Δu=0 in a fiber bundle, where the Laplacian is the Laplacian of the Wheeler–DeWitt metric provided n≠4. Using then separation of variables, the solutions u can be expressed as products of temporal and spatial eigenfunctions, where the ...
openaire   +3 more sources

Pulling back the curtain on 'behind the border' trade costs: The case of EU-US agri-food trade

open access: yesSpanish Journal of Agricultural Research, 2017
With the rise of anti-free-trade sentiment on both sides of the Atlantic, there is a growing urgency by trade negotiators to conclude the Trans-Atlantic Trade and Investment Partnership (TTIP) negotiations. The harmonisation of non-tariff restrictions is
Ana I. Sanjuán   +2 more
doaj   +1 more source

Decoherence-free entropic gravity: Model and experimental tests

open access: yesPhysical Review Research, 2021
Erik Verlinde's theory of entropic gravity [E. Verlinde, J. High Energy Phys. 04 (2011) 02910.1007/JHEP04(2011)029], postulating that gravity is not a fundamental force but rather emerges thermodynamically, has garnered much attention as a possible ...
Alex J. Schimmoller   +3 more
doaj   +1 more source

Networks and export performance of agri-food firms: New evidence linking micro and macro determinants

open access: yesAgricultural Economics (AGRICECON), 2016
The paper complements a new line of research that includes the firm heterogeneity in trade models. The central idea of this research is that only the largest and most efficient firms are capable of exporting. However, the empirical evidence has confirmed
Raul SERRANO   +2 more
doaj   +1 more source

The Gravity Force Generated by a Non-Rotating Level Ellipsoid of Revolution with Low Eccentricity as a Series of Spherical Harmonics

open access: yesMathematics, 2023
The gravity force of a gravity field generated by a non-rotating level ellipsoid of revolution enclosing mass M is given as a solution of a partial differential equation along with a boundary condition of Dirichlet type. The partial differential equation
Gerassimos Manoussakis
doaj   +1 more source

Stochastic equations for gravity [PDF]

open access: yesPhysics Letters B, 1986
Abstract The Langevin equations governing stochastic quantization of gravity are established. These equations hold true, independently of the value of the torsion. They are covariant under the BRS symmetry associated to local diffeomorphisms and Lorentz transformations.
openaire   +1 more source

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