12,446 research outputs found
Monetary Policy Rules and Inflation Targets in Emerging Economies Evidence for Mexico and Israel
Rationality and Brauer group of a moduli space of framed bundles
We prove that the moduli spaces of framed bundles over a smooth projective
curve are rational. We compute the Brauer group of these moduli spaces to be
zero under some assumption on the stability parameter.Comment: 7 pages, to appear in Tbilisi Math. J; v2. reference adde
The Effect of the Exchange Rates on Investment in Mexican Manufacturing Industry
This paper, considering revenue and cost exposure channels, investigates the effects of exchange rate behaviour on fixed capital investment in Mexican manufacturing sector over 1994-2002. We find that i) currency depreciation has a positive (negative) effect on fixed investment through the export (import) channel; ii) exchange rate volatility impacts mostly export oriented sectors ; iii) the sensitivity of investment to exchange rate movements is stronger in non-durable goods sectors and industries with low mark-up ratios.Exchange rate volatility ; investment ; external exposure ; market structure
Time-Delayed transfer functions simulations for LMXBs
Recent works (Steeghs & Casares 2002, Casares et al. 2003, Hynes et al. 2003)
have demonstrated that Bowen flourescence is a very efficient tracer of the
companion star in LMXBs. We present a numerical code to simulate time-delayed
transfer functions in LMXBs, specific to the case of reprocessing in emission
lines. The code is also able to obtain geometrical and binary parameters by
fitting observed (X-ray + optical) light curves using simulated annealing
methods. In this work we present the geometrical model for the companion star
and the analytical model for the disc and show synthetic time-delay transfer
functions for different orbital phases and system parameters.Comment: Contribution presented at the conference "Interacting Binaries:
Accretion, Evolution and Outcomes", held in Cefalu, Sicily (Italy) in July
2004. To be published by AIP (American Institute of Physics), eds. L. A.
Antonelli, L. Burderi, F. D'Antona, T. Di Salvo, G.L. Israel, L. Piersanti,
O. Straniero, A. Tornambe. 4 pages, 4 figure
Dynamics of soliton-like solutions for slowly varying, generalized gKdV equations: refraction vs. reflection
In this work we continue the description of soliton-like solutions of some
slowly varying, subcritical gKdV equations.
In this opportunity we describe, almost completely, the allowed behaviors:
either the soliton is refracted, or it is reflected by the potential, depending
on its initial energy. This last result describes a new type of soliton-like
solution for gKdV equations, also present in the NLS case.
Moreover, we prove that the solution is not pure at infinity, unlike the
standard gKdV soliton.Comment: 51 pages, submitte
Optimal scheme for estimating a pure qubit state via local measurements
We present the optimal scheme for estimating a pure qubit state by means of
local measurements on N identical copies. We give explicit examples for low N.
For large N, we show that the fidelity saturates the collective measurement
bound up to order 1/N. When the signal state lays on a meridian of the Bloch
sphere, we show that this can be achieved without classical communication.Comment: Version to appear in PRL (minor changes, title changed
Estudi de la viabilitat econòmica d’un vehicle de transport basat en una pila de combustible polimèrica (PEMFC)
Treballs Finals del Mà ster d’Energies Renovables i Sostenibilitat Energètica, Facultat de FÃsica, Universitat de Barcelona, Curs: 2013-2014, Tutor: Pere LluÃs CabotDes de principis del S. XIX, la humanitat ha anat incrementant el consum de combustibles fòssils
destinats al funcionament de la indústria en general i més concretament al transport, sector que
consumeix aproximadament el 40% de l’energia primà ria generada (IDAE, 2014) (WWF, 2014). Aquest
consum sempre ha estat estretament lligat a l’extracció i producció de manera exponencial de carbó,
petroli i gas natural (BP, 2013) demostrant aixà que el model energètic actual té una dependència
gairebé total de les fonts d’energia no renovables i va en augment amb una taxa mitjana de creixement
d’un 2% (ICAEN, 2014).
Aquesta dependència comporta certs problemes que es van agreujant amb el temps. Un dels problemes
més tangibles és el fet que amb les tecnologies i sistemes d’obtenció de combustibles fòssils actuals, les
reserves són finites i, a més a més, en la dècada actual s’ha arribat al pic mà xim de producció fent que el
preu del petroli s’hagi disparat a valors inesperats i segueixi incrementant any rere any (Peak Oil Association)..
Por una sociologÃa de la promoción de la salud. Reflexionando a propósito de los programas de educación maternal.
La Carta de Otawa de 1986, sentó las bases para promover un cambio epistemológico en la concepción de la salud pública y de la promoción de la salud. Sin embargo, las estructuras y las lógicas que dan soporte al conocimiento biomédico, parecen demostrar su resistencia ante dicho cambio cultural. La contribución de las refl exiones a propósito de este supuesto cambio de paradigma, nos sirven en este artÃculo para presentar algunas conclusiones extraÃdas de una investigación crÃtica y feminista sobre el Programa de Educación Maternal de la Comunitat Valenciana, y que nos advierten de la contribución de estas estrategias sanitarias como productoras/reproductoras de un régimen androcéntrico de género, de un orden social que sigue subyugando a las mujeres y a lo femenino y colocando lo masculino en una posición dominante
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