Trends and cycles: How important are long- and short-run restictions? The case of Mexico

The document presents a test for the existence of binding long- and short-run (common trend-common cycle) restrictions in the dynamics of a set of Mexican macroeconomic variables. These restrictions are imposed in a VAR to decompose the series into their permanent and transitory components. The analysis shows that the magnitude of transitory (nominal) shocks is underestimated when such restrictions are not considered. In addition, we find that the timing and duration of recession and expansion periods are more accurately estimated when the trend-cycle decomposition is conducted with the imposition of cointegrating (long-run) and common feature (short-run) restrictions.

SNS junctions in nanowires with spin-orbit coupling: role of confinement and helicity on the sub-gap spectrum

We study normal transport and the sub-gap spectrum of superconductor-normal-superconductor (SNS) junctions made of semiconducting nanowires with strong Rashba spin-orbit coupling. We focus, in particular, on the role of confinement effects in long ballistic junctions. In the normal regime, scattering at the two contacts gives rise to two distinct features in conductance, Fabry-Perot resonances and Fano dips. The latter arise in the presence of a strong Zeeman field $B$ that removes a spin sector in the leads (\emph{helical} leads), but not in the central region. Conversely, a helical central region between non-helical leads exhibits helical gaps of half-quantum conductance, with superimposed helical Fabry-Perot oscillations. These normal features translate into distinct subgap states when the leads become superconducting. In particular, Fabry-Perot resonances within the helical gap become parity-protected zero-energy states (parity crossings), well below the critical field $B_c$ at which the superconducting leads become topological. As a function of Zeeman field or Fermi energy, these zero-modes oscillate around zero energy, forming characteristic loops, which evolve continuously into Majorana bound states as $B$ exceeds $B_c$. The relation with the physics of parity crossings of Yu-Shiba-Rusinov bound states is discussed.Comment: 12 pages main article, 14 figures + 5 pages supplementary material, 5 figures. Added new appendix. Other minor changes. Published versio

Multiple Andreev reflection and critical current in topological superconducting nanowire junctions

We study transport in a voltage biased superconductor-normal-superconductor (SNS) junction made of semiconducting nanowires with strong spin-orbit coupling, as it transitions into a topological superconducting phase for increasing Zeeman field. Despite the absence of a fractional steady-state ac Josephson current in the topological phase, the dissipative multiple Andreev reflection (MAR) current I_dc at different junction transparencies is particularly revealing. It exhibits unique features related to topology, such as the gap inversion, the formation of Majorana bound states, and fermion-parity conservation. Moreover, the critical current I_c, which remarkably does not vanish at the critical point where the system becomes gapless, provides direct evidence of the topological transition.Comment: Published version, 21 pages, 7 figures, 3 appendice

Partial orderings for hesitant fuzzy sets

New partial orderings =o=o, =p=p and =H=H are defined, studied and compared on the set HH of finite subsets of the unit interval with special emphasis on the last one. Since comparing two sets of the same cardinality is a simple issue, the idea for comparing two sets A and B of different cardinalities n and m respectively using =H=H is repeating their elements in order to obtain two series with the same length. If lcm(n,m)lcm(n,m) is the least common multiple of n and m we can repeat every element of A lcm(n,m)/mlcm(n,m)/m times and every element of B lcm(n,m)/nlcm(n,m)/n times to obtain such series and compare them (Definition 2.2). (H,=H)(H,=H) is a bounded partially ordered set but not a lattice. Nevertheless, it will be shown that some interesting subsets of (H,=H)(H,=H) have a lattice structure. Moreover in the set BB of finite bags or multisets (i.e. allowing repetition of objects) of the unit interval a preorder =B=B can be defined in a similar way as =H=H in HH and considering the quotient set View the MathML sourceB¿=B/~ of BB by the equivalence relation ~ defined by A~BA~B when A=BBA=BB and B=BAB=BA, View the MathML source(B¿,=B) is a lattice and (H,=H)(H,=H) can be naturally embedded into it.Peer ReviewedPostprint (author's final draft

Wealth and evironment in the CECEL activities

Promoting the recovering of the cultural and environmental heritage and wealth is described as one of CECEL main tasks along with the recovering of Natural and monumental richness.Se define como una de las tareas primordiales de la CECEL promover la conservación del Patrimonio Cultural y Medioambiental, así como el Patrimonio natural y monumental

The genesis of the iberian statuatary

Estudio de los orígenes formales e iconográficos de la estatuaria ibérica a partir de los conjuntos del Cerrillo Blanco de Porcuna y de Osuna. La identificación de sus modelos en los frisos y frontones de la época arcaica en Atenas, Delfos y Olimpia, permite explicar el origen y significado de las composiciones. Esta interpretación de la escultura ibérica sitúa sus orígenes alrededor del año 500 a.C., tras los que se produjo una secuencia de reproducciones sin nuevas aportaciones griegas. Puede deducirse la existencia de un importante monumento en el área turdetana, que fue copiado hasta época romana por los talleres localesStudy of formal and iconographic origins of Iberian statuary from the sets of Cerrillo Blanco in Porcuna and Osuna. The identification of its models in the friezes and pediments of the archaic period in Athens, Delphi and Olympia, helps to explain the origin and meaning of the compositions. This interpretation of Iberian sculpture locates its origins around 500 BC, after which there was a sequence of reproductions without further Greek input. Can deduce the existence of an important monument in the turdetan area, which was copied to Roman times for local workshops

Desafío del territorio al trabajo social de ONG's, escuelas, etc.: Si no estás conmigo estás contra mí. El territorio como nuevo eje articulador del trabajo social.

La complejidad creciente de las sociedades de hoy, la experiencia acumulada en años de trabajo social (TS) y su profesión, y el avance en la evaluación sobre lo que es y lo que conviene que realicen las y los trabajadores sociales, ha conducido a que cada vez menos se contenten éstos(-as) con convertir su profesión en una trabajo asistencialista que se quede en niveles marginales en relación con las dinámicas mayores de la sociedad. El presente escrito se propone mostrar en su Parte Primera –“Planteamiento del Problema”- que eso no sólo no es así, sino que la vocación del TS y su profesionista es radicalmente otra cosa de mucha mayor relevancia que lo coloca en la línea frontal de los problemas mayores de la sociedad contemporánea. Para mostrar esto, nuestro presente trabajo intentará ir al fondo de lo que es el TS. Lo que llevará a preguntarnos sobre su identidad profunda y peculiaridad propia, en cuanto profesión y en cuanto campo científico. Sólo yendo en profundidad a esta pregunta se podrán lograr respuestas también de fondo que cambien por completo tales percepciones absolutamente insuficientes. De ello se ocupa, desde un punto de vista teórico-metodológico, la Parte Segunda -“El territorio, marco teórico y eje articulador de la carrera de trabajo social”