International Evidence on Tradables and Nontradable Inflation

Using 1970-1985 sectoral data for the OECD we find that inflation in nontradable goods is higher than in tradables, We identify a demand shift towards nontradables and faster growth of total factor productivity in the tradable goods sector as the prime causes of higher nontradables inflation. In addition. disinflation attempts and the exchange rate regime appear to have had significant influence on the relative inflation rate.

A first principles TDDFT framework for spin and time-resolved ARPES in periodic systems

We present a novel theoretical approach to simulate spin, time and angular-resolved photoelectron spectroscopy (ARPES) from first principles that is applicable to surfaces, thin films, few layer systems, and low-dimensional nanostructures. The method is based on a general formulation in the framework of time-dependent density functional theory (TDDFT) to describe the real time-evolution of electrons escaping from a surface under the effect of any external (arbitrary) laser field. By extending the so called t-SURFF method to periodic systems one can calculate the final photoelectron spectrum by collecting the flux of the ionization current trough an analysing surface. The resulting approach, that we named t-SURFFP, allows to describe a wide range of irradiation conditions without any assumption on the dynamics of the ionization process allowing for pump-probe simulations on an equal footing. To illustrate the wide scope of applicability of the method we present applications to graphene, mono- and bi-layer WSe$_2$, and hexagonal BN under different laser configurations

Government revenue from financial repression

This paper explores the theoretical underpinnings and empirical relevance to public finance of financial repression - of controls on international capital flows and on domestic financial intermediaries. It concludes, in principle, countries should not resort to financial repression when they face no constraints on taxation, but such constraints as administrative cost and income distribution objectives might justify an implicit tax on domestic financial markets. The revenue from financial repression can be substantial. The unweighted cross-country average is about 2 percent of GDP and 9 percent of total government revenue, but varies significantly among countries. Reform aimed at liberalizing financial markets should first estimate what amount of government revenue comes from financial repression and provide for the revenue shortfall that will result from financial liberalization. Finally, this paper concludes that countries with higher rates of inflation tend to raise more revenue from financial repressions because the relative costs of foreign and domestic borrowing are influenced by the domestic currency's rate of depreciation, since domestic nominal interest rates are normally fixed administratively.Environmental Economics&Policies,Banks&Banking Reform,Public Sector Economics&Finance,Financial Economics,Economic Theory&Research

Phonon driven Floquet matter

A resonantly excited coherent phonon leads to a periodic oscillation of the atomic lattice in a crystal structure bringing the material into a non-equilibrium electronic configuration. Periodically oscillating quantum systems can be understood in terms of Floquet theory and we show these concepts can be applied to coherent lattice vibrations reflecting the underlying coupling mechanism between electrons and bosonic modes. This coupling leads to dressed quasi-particles imprinting specific signatures in the spectrum of the electronic structure. Taking graphene as a paradigmatic material we show how the phonon-dressed states display an intricate sideband structure revealing electron-phonon coupling and topological ordering. This work establishes that the recently demonstrated concept of light-induced non-equilibrium Floquet phases can also be applied when using coherent phonon modes for the dynamical control of material properties. The present results are generic for bosonic time-dependent perturbations and similar phenomena can be observed for plasmon, magnon or exciton driven materials

Maps of zeroes of the grand canonical partition function in a statistical model of high energy collisions

Theorems on zeroes of the truncated generating function in the complex plane are reviewed. When examined in the framework of a statistical model of high energy collisions based on the negative binomial (Pascal) multiplicity distribution, these results lead to maps of zeroes of the grand canonical partition function which allow to interpret in a novel way different classes of events in pp collisions at LHC c.m. energies.Comment: 17 pages, figures (ps included); added references, some figures enlarged. To appear in J. Phys.

The inner kiloparsec of the jet in 3C264

We present new multi-frequency EVN, MERLIN and VLA observations of the radio source 3C264, sensitive to linear scales ranging from the parsec to several kiloparsecs. The observations confirm the existence of regions with different properties in the first kiloparsec of the jet. The most remarkable feature is the transition between a well collimated narrow jet at distances from the core below 80 pc, to a conical-shaped wide jet, with an opening angle of 20 degrees. Another change of properties, consisting of an apparent deflection of the jet ridge line and a diminution of the surface brightness, occurs at a distance of 300 pc from the core, coincident with the radius of a ring observed at optical wavelengths. Our observations add new pieces of information on the spectrum of the radio-optical jet of 3C264, with results consistent with a synchrotron emission mechanism and a spectrum break frequency in the infrared. Brightness profiles taken perpendicularly to the jet of 3C264 are consistent with a spine brightened jet at distances below 100 pc from the core, and an edge-brightened jet beyond, which can be interpreted as evidence of a transverse jet velocity structure. Our observations do not allow us to distinguish between the presence of a face--on dust and gas disk at the center of the host galaxy of 3C264, or rather an evacuated bubble. However, the properties of the jet structure, the changes in the polarization angle, and the plausible jet orientation can be naturally brought into agreement in the bubble scenario.Comment: 10 pages, 9 figures, accepted in A&

Experiencias de niños y niñas sobre el comer y el habitar en una escuela pública de la Ciudad de Córdoba

Se analizarán los primeros avances obtenidos en el marco de un proyecto de extensión universitario cuyo objetivo consiste en promover la participación de niñas y niños en edad escolar como actores activos de su comunidad, fundamentalmente a partir de la reflexión acerca de dos tipos de prácticas fundamentales de su experiencia: el comer y el habitar. Esta iniciativa se desarrolla en el Centro Educativo Batería Libertad, Barrio Lomas del Suquía, Córdoba capital, durante el período lectivo 2017. A esta institución concurren niños/as provenientes de barrios socio-segregados de la zona oeste de la ciudad (Costa Canal, Villa Urquiza, Las Violetas, El Tropezón, El Pueblito y Barrio Residencial Villa Mafekín). En el contexto escolar observamos una modalidad verticalista de participación, circunstancias que propician que las prácticas de comer y habitar de niños y niñas estén fuertemente ancladas en un posicionamiento adulto, dejando estrechos márgenes para la expresión y construcción colectiva de conocimientos en ese sentido. El enfoque metodológico que fue elegimos responde a talleres expresivos creativos puesto que consideramos que por este medio es posible traer a escena la dimensión sensible de tales prácticas como lugar constituyente, constitutivo y en constitución que se despliega en la relación de las niñas y los niños con el mundo en tanto proceso dinámico. De este modo, trabajamos con cada una de las divisiones de 6° grado (A, B y C), puesto que son las/os mayores de la institución, particularidad que involucra la posibilidad de un mayor aprendizaje, conocimientos y experiencias que amplían la base para la actividad creadora de su imaginación. Como resultante del proceso de trabajo extensionista intentamos construir de manera participativa expresiones colectivas respecto a los decires/sentires vinculados al comer y al habitar de las niñas y los niños de cada una de esas divisiones.Fil: De Giovannini, Antonella . Universidad Nacional de Córdob

Modification of cluster radio halo appearance by the thermal Sunyaev-Zeldovich effect

We discuss the consequences of the spectral and morphological modification of galaxy cluster radio halos due to the Sunyaev-Zeldovich (SZ) effect for the interpretation of existing and upcoming high frequency radio observations. Likely these modifications have affected the interpretation of the existing Coma cluster radio data. The radio halo emission visible at low (< 5 GHz) frequencies is at higher (> 10 GHz) frequencies completely over-compensated by the thermal SZ decrement. Thus, the total radio emission of a galaxy cluster goes through zero (in comparison to the constant cosmic microwave background (CMB) emission) at a frequency of several GHz. Since the radio halo brightness has a narrow radial profile compared to the SZ decrement, a central emission region is surrounded by a decrement within the intermediate frequency range of several GHz. The size of this emission regions shrinks with increasing frequency until the decrement dominates everywhere in the cluster.Comment: accepted by A&A Letters, 4 pages, 3 figurs, typo correcte

Cavity control of Excitons in two dimensional Materials

We propose a robust and efficient way of controlling the optical spectra of two-dimensional materials and van der Waals heterostructures by quantum cavity embedding. The cavity light-matter coupling leads to the formation of exciton-polaritons, a superposition of photons and excitons. Our first principles study demonstrates a reordering and mixing of bright and dark excitons spectral features and in the case of a type II van-der-Waals heterostructure an inversion of intra and interlayer excitonic resonances. We further show that the cavity light-matter coupling strongly depends on the dielectric environment and can be controlled by encapsulating the active 2D crystal in another dielectric material. Our theoretical calculations are based on a newly developed non-perturbative many-body framework to solve the coupled electron-photon Schr\"odinger equation in a quantum-electrodynamical extension of the Bethe-Salpeter approach. This approach enables the ab-initio simulations of exciton-polariton states and their dispersion from weak to strong cavity light-matter coupling regimes. Our method is then extended to treat van der Waals heterostructures and encapsulated 2D materials using a simplified Mott-Wannier description of the excitons that can be applied to very large systems beyond reach for fully ab-initio approaches.Comment: 32 pages. 10 figures, 2 tabl

Oscillations of Moments and Structure of Multiplicity Distributions in e+e- Annihilation

Starting from the recognized fact that oscillations of moments with rank and shoulder structure in the multiplicity distribution have the same origin in the full sample of events in e+e- annihilation, we push our investigation to the 2-jet sample level, and argue in favor of the use of the negative binomial multiplicity distribution as the building block of multiparticle production in e+e- annihilation events. It will be shown that this approach leads to definite predictions for the correlation structure, e.g., that correlations are flavour independent.Comment: 6 pages, LaTeX2e (uses amsmath,epsfig,espcrc2), 4 postscript figures. To be published in the Proceedings of the XXVII International Symposium on Multiparticle Dynamics, Frascati (Italy), September 8--12, 199