Results 71 to 80 of about 1,584,853 (313)

O nordeste e o comércio inter-regional e internacional: um teste dos impactos por meio do modelo gravitacional

open access: yesEconomia Aplicada, 1998
This article discusses the trade flow from the Northeast to the others regions of Brazil and to the others countries of the world, using the gravity equation as the theoretical support.
Álvaro Barrantes Hidalgos   +1 more
doaj  

Corporate Social Responsibility and its Macroeconomic Implications [PDF]

open access: yesRevista de Management Comparat International, 2011
One of main concern of policy makers is pollution and hence the improvement of the environmental quality. The implementation of environment policies aims at improving life and product quality in order to replace those obtained by high polluting processes
Robert SOVA   +3 more
doaj  

Covariantising the Beltrami equation in W-gravity [PDF]

open access: yesLetters in Mathematical Physics, 1996
Recently, certain higher dimensional complex manifolds were obtained in [hep-th/9412078] by associating a higher dimensional uniformisation to the generalised Teichmüller spaces of Hitchin. The extra dimensions are provided by the ``times'' of the generalised KdV hierarchy. In this paper, we complete the proof that these manifolds provide the analog of
openaire   +3 more sources

Feasibility and Limitations of the Advanced Replica Process for Bioactive Glasses

open access: yesAdvanced Engineering Materials, EarlyView.
Periodic 3D‐printed Kelvin‐cell templates enable a controlled advanced replica process for fabricating highly porous glass lattices. Across P45K9, 45S5, and 13–93, material‐dependent differences in coating, burnout, and shrinkage lead to distinct strut morphologies, while comparable final porosities of 83%–88% are retained.
Swantje Funk   +4 more
wiley   +1 more source

Gravity Chains: Estimating bilateral trade flows when parts and components trade is important

open access: yesJournal of Banking and Financial Economics, 2014
Trade is measured on a gross sales basis while GDP is measured on a net sales basis, i.e. value added. The rapid internationalisation of production in the last two decades has meant that gross trade flows are increasingly unrepresentative of the value ...
Richard E. Baldwin, Daria Taglioni
doaj   +1 more source

Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow   +9 more
wiley   +1 more source

International Trade Efficiency, the Gravity Equation, and the Stochastic Frontier [PDF]

open access: yes
In the gravity equation of international trade, bilateral trade flows are regressed on trading partners’ income and the distance that separates them along with other variables.
Heejoon Kang, Michele Fratianni
core  

Advances in Sustainable and Wearable Textile Based Soft Robotics

open access: yesAdvanced Functional Materials, EarlyView.
This Review examines advances in wearable textile‐based soft robotics, focusing on sustainable materials, integrated sensing, and scalable actuation. It discusses manufacturing and system integration across healthcare, assistive robotics, prosthetics, and human–machine interfaces, and highlights key challenges in circular design, including life‐cycle ...
Zahir Abbas   +6 more
wiley   +1 more source

Intra-industry Trade and the Gravity Equation: A Cournot-Ricardo Approach

open access: yesEast Asian Economic Review, 2000
This paper shows that Cournot competition in segmented markets generate both intra-industry trade and the gravity equation. The paper also demonstrates that the gravity equation holds if and only if the market shares of an exporting country do not depend
E. Young Song
doaj   +1 more source

Scattering of Ricci scalar perturbations from Schwarzschild black holes in modified gravity

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
It has already been shown that the gravitational waves emitted from a Schwarzschild black hole in f(R) gravity have no signatures of the modification of gravity from General Relativity, as the Regge–Wheeler equation remains invariant.
Dan B. Sibandze   +4 more
doaj   +1 more source

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