7,094 research outputs found
Discourse Markers and Modal Expressions in Speakers with and without Asperger Syndrome: A Pragmatic-Perceptive Approach
From a theoretical point of view, this paper offers a new framework for the analysis of discourse markers: a pragmatic-perceptive model that emphasizes the point of the communication process in which such particles become more relevant. Furthermore, this approach tries to give an account of the modal expressions (attenuators and intensifiers) that speakers use in oral speech. The quotients of absolute and relative frequency with regard to the use of textual, interactive and enunciative markers - focused on the message, the addressee and the addresser respectively - are compared in two samples of 20 subjects with typical development and other 20 with Asperger syndrome. The general results of this research suggest that these latter speakers display a suitable command of textual markers, whereas they overexploit the enunciative ones in conversation
Anarchy, State, and Dystopia: Venezuelan Economic Institutions before the Advent of Oil.
This paper studies the evolution of Venezuelan economic institutions before the emergence of oil exploitation in 1920. We argue that by 1920 Venezuela had developed a highly centralized state and a professionalized military. These two institutions ensured that growing oil revenues would strengthen the state structure and protected Venezuela from the resource-conflict trap into which many oil-abundant countries have fallen. We also argue that the failure to develop institutions that could mediate between sectoral demands and the state, the subordination of property rights to political imperatives and the political dominance of the commercial-financial elite conditioned the nationâs response to the post-1920 influx of oil revenues.
Near-Field Directionality Beyond the Dipole Approximation: Electric Quadrupole and Higher-Order Multipole Angular Spectra
Within the context of spin-related optical phenomena, the near-field
directionality is generally understood from the quantum spin Hall effect of
light, according to which the transverse spin of surface or guided modes is
locked to the propagation direction. So far, most previous works have been
focused on the spin properties of circularly polarized dipolar sources.
However, in near-field optics, higher-order multipole sources (e.g.,
quadrupole, octupole, and so on) might become relevant, so a more in-depth
formulation would be highly valuable. Building on the angular spectrum
representation, we provide a general, analytical, and ready-to-use treatment in
order to address the near-field directionality of any multipole field,
particularizing to the electric quadrupole case. Besides underpinning and
upgrading the current framework on spin-dependent directionality, our results
may open up new perspectives for engineering light-matter coupling at the
nanoscale.Comment: 7 pages, 2 figures. Supplemental Material (19 pages). Supplemental
tools (calculator of angular spectra and animation) available at
https://doi.org/10.5281/zenodo.267790
On the impact of exchange rate regimes on tourism
The main objective of this paper is to analyze the effect of the exchange rate arrangements on international tourism. The ambiguity of literature about the effect of exchange rate volatility contrasts with the magnitude of the impact of a common currency on trade. On the basis of a gravity equation we estimate a moderate effect of a currency union on tourism of almost 12%. Furthermore, we estimate a gravity equation for international trade, obtaining that the common currency effect on trade is reduced when tourism is introduced as a regressor. This suggests that tourism flows may contribute to explain the excessive magnitude of the estimated effect of a common currency on trade in this literature. Finally, we analyze the impact of several de facto exchange rate arrangements on tourism, finding that less flexible exchange rates promotes tourism flows.Tourism, Exchange Rate Regime, Common Currency
Revisiting Rose's common currency debate
The main objective of this research is to revisit the estimation of the effect of a common currency on international trade by applying the new methodology proposed by Helpman, Melitz and Rubistein (2008) and incorporating tourism to the theoretical framework. Rose (2000) estimates an empirical model of bilateral trade, finding a significant coefficient for a currency union variable of 1.2, suggesting an effect of currency unions on trade of over a 200%. Rose (2000)âs finding did not receive full acceptance and further research was consequently devoted to find reasons of such high effect. This still remains as a major puzzle in the International Economics. Rose and Van Wincoop (2001) hold that there may still be some omitted factors that drives countries to both participate in currency unions and trade more. In this research a gravity equation for trade is estimated controlling by international tourism.Common currency, tourism, gravity equation
Interferometric evanescent wave excitation of nano-antenna for ultra-sensitive displacement and phase metrology
We propose a method for ultra-sensitive displacement and phase metrology
based on the interferometric evanescent wave excitation of nano-antennas. We
show that with a proper choice of nano-antenna, tiny displacements or relative
phase variations can be converted into sensitive scattering direction changes
in the Fourier -space. These changes stem from the strong position
dependence of the imaginary Poynting vector orientation within interfering
evanescent waves. Using strongly-evanescent standing waves, high sensitivity is
achieved in the nano-antenna's zero scattering direction, which varies linearly
with displacement over a long range. With weakly-evanescent wave interference,
even higher sensitivity to tiny displacement or phase changes can be reached
around chosen location. The high sensitivity of the proposed method can form
the basis for many applications
EconomĂa aplicada: La metodologĂa mĂĄs extendida en la contabilizaciĂłn de las existencias comerciales
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