Competitive behavior and specialization of the Andalusian trade in the period 1999-2009

Hemos tratado de comprobar, no sólo los cambios generales y tendencias que se han producido en las exportaciones andaluzas desde 1999 a 2009, sino también, aquellos que tienen que ver con la relación entre sectores que aumentan su penetración real en los mercados y que se han comportado de forma competitiva, y su relación con los cambios en la especialización exportadora, para relacionar dichos cambios con los que pueden estar sucediendo en la estructura productiva, comprobando el papel que han desempeñado las provincias.We have tried to verify, not only the general changes and trends that have taken place in the Andalusian exports from 1999 to 2009, but also, those that they have to see with the relation between sectors that increase his royal penetration the markets and that they have endured of competitive form, and his relation with the changes in the exporting specialization, to relate the above mentioned changes with which they can be happening in the productive structure, verifying the paper(role) that the provinces have recovered(played)

The export competitiveness of social enterprises as compared to with export SMEs

Purpose – This study aims to determine the export competitiveness of the Social Economy in Andalusia, this is carried out by quantifying the export competitiveness of the internationalized enterprises of the Social Economy in the export sector of the region. Design/methodology/approach – The strengths and weaknesses of this business sector are quantified and the Rasch´s Probability. It is a model used to measure the latent variable called export competitiveness, which is defined by items (factors): size, cooperation, number of target markets, competitive advantages, years abroad and percentage of sales abroad. The article provides empirical evidence of 362 Andalusian export enterprises. Findings – The results show that the export competitiveness of social enterprises reflected their strengths as compared with other SMEs. Originality/value – This concept paper empirically combines two different fields of knowledge (design and behavior of companies) in the construction of the foreign trade. This work standardizes the treatment of two descriptors scarcely discussed in the literature: Social Enterprises and Export

La Economía Social Exportadora de Sevilla: Un análisis exploratorio

Andalucía ha mostrado en los últimos años su dinamismo exportador además de experimentar un incremento del peso de la economía social en su PIB. Este artículo comprueba el aumento de las exportaciones andaluzas y demuestra que la internacionalización es una necesidad competitiva. Nos centraremos en cómo las empresas de economía social conforman un sector revelador en este sentido, destacando la provincia de Sevilla por sostener el mayor peso de empresas de la economía social andaluza y una parte distinguida del tejido exportador regional. A causa del desconocimiento de la influencia de este sector en el crecimiento y la inexistencia de bases de datos relacionales que permitan conocer cómo opera la economía social andaluza, nuestro objetivo ha sido profundizar en la evolución de la actividad exportadora regional, desde una visión retrospectiva, y, más concretamente, en el desempeño exportador de la economía social sevillana

Structural modelling of medieval walls

International Seminar on Structural Analysis of Historical Constructions (3º 2001 Guimaraens)Sistemas constructivos medievales a menudo involucrados la construcción de múltiples capas paredes formadas por dos caras de sillería o mampostería con un relleno central que consiste en escombros ligada con mortero, generalmente cal-basado. Se trata de una construcción simple y eficiente sistema que se siguió utilizando en los siglos posteriores. Sin embargo, el modelado estructural de este tipo de pared no es fácil de lograr. Los dos pared caras no están vinculados rígidamente y, por otro lado, las bóvedas son normalmente compatibles sólo en el la cara interna, lo que resulta en la eficiencia reducida de la unidad de pared. Modelos comunes de elementos finitos no son capaces de resolver muchos de los problemas que surgen cuando se aplican a una monumental construcción. En este trabajo se aborda el problema y propone varias posibilidades de solución con diferentes tipos de elementos .. También proporciona dos ejemplos de monumentos góticos en Galicia (España) en el que comportamiento estructural se ha estudiado el uso de algunos de estos modelos de cálculo: las iglesias de Guimaraens y Cambados.[Abstract]Medieval construction systems usually involved the construction of multi-layer walls formed by two faces of ashlar work or masonry with a central infilling consisting of rubble bound with mortar, generally lime-based. It is a simple and efficient construction system which continued to be used in subsequent centuries. Nevertheless, structural modelling of this type of wall is not easy to achieve. The two wall faces are not rigidly bound and on the other hand, vaults are normally supported only on the intemal face, resulting in reduced efficiency of the wall unit. Common models of finite elements are unable to solve many of the problems that arise when they are applied to a monumental construction. This paper tackles the problem and puts forward various possibilities of solution with different element types.. It also provides two examples of Gothic monuments in Galicia (Spain) in which structural behaviour was studied using some of these calculation models: the churches of Guimarei and Cambados

Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E_6 Superstring Models

We obtain limits on the electromagnetic and weak dipole moments of the tau-lepton in the framework of a Left-Right symmetric model (LRSM) and a class of $E_6$ inspired models with an additional neutral vector boson $Z_\theta$. Using as an input the data obtained by the L3 and OPAL Collaborations for the reaction $e^+e^-\to \tau^+\tau^-\gamma$, we get a stringent limit on the LRSM mixing angle $\phi$, $-1.66\times 10^{-3}< \phi<1.22\times 10^{-3}$, which in turn induces bounds on the tau weak dipole moments which are consistent with the bounds obtained recently by the DELPHI and ALEPH Collaborations from the reaction $e^+e^-\to \tau^+\tau^-$. We also get similar bounds for the weak dipole moments of the tau lepton in the framework of $E_6$ superstring models.Comment: 18 pages, 5 figure

Natural-cycle in vitro fertilization (IVF) combined with in vitro maturation in infertile patients with polycystic ovarian syndrome (PCOS) requiring IVF

REPA is supported by CONACYT (329705) Mexico and Elphinstone scholarships and a fellowship from IBSA Foundation.Peer reviewedPublisher PD

Electronic structure of crystalline binary and ternary Cd-Te-O compounds

The electronic structure of crystalline CdTe, CdO, $\alpha$-TeO$_2$, CdTeO$_3$ and Cd$_3$TeO$_6$ is studied by means of first principles calculations. The band structure, total and partial density of states, and charge densities are presented. For $\alpha$-TeO$_2$ and CdTeO$_3$, Density Functional Theory within the Local Density Approximation (LDA) correctly describes the insulating character of these compounds. In the first four compounds, LDA underestimates the optical bandgap by roughly 1 eV. Based on this trend, we predict an optical bandgap of 1.7 eV for Cd$_3$TeO$_6$. This material shows an isolated conduction band with a low effective mass, thus explaining its semiconducting character observed recently. In all these oxides, the top valence bands are formed mainly from the O 2p electrons. On the other hand, the binding energy of the Cd 4d band, relative to the valence band maximum, in the ternary compounds is smaller than in CdTe and CdO.Comment: 13 pages, 15 figures, 2 tables. Accepted in Phys Rev

Flavor-changing top quark rare decays in the Bestest Little Higgs Model

This paper investigates the effects of parameters in the Bestest Little Higgs Model (BLHM) on rare flavor-changing decays of the top quark. As a result, flavor-changing phenomena are introduced in the BLHM for the first time. In this study, we incorporate new flavor mixing terms between the light quarks of the Standard Model (SM) and the fermions and bosons of the BLHM. We compute the one-loop contributions from the heavy quark $(B)$ and the heavy bosons $(W^{\prime\pm}, \phi^{\pm}, \eta^{\pm},H^{\pm})$. Our findings demonstrate that the branching ratios of decays $t\to qV$ and $t\to qh^0$, where $q=u,c$ and $V=Z, \gamma, g$, exhibit improvements compared to their counterparts in the SM, except for the gluon case. Moreover, we observe that the processes with higher sensitivity are $Br(t\to cZ)\sim 10^{-5}$, $Br(t\to c\gamma)\sim 10^{-6}$ and $Br(t \to ch^0) \sim 10^{-8}$ within the appropriate parameter space.Comment: 13 pages and 10 figure

Propiedades de las rocas volcánicas de Canarias (España) utilizadas como material de escollera

In the Canary Islands, there is a wide spectrum of volcanic rocks with different properties to be used in public works. The aim of this study is to analyse the physical-mechanical properties of all the volcanic rocks present in the Canary Island archipelago in order to determine their suitability for use in maritime construction works. The great variety of volcanic rocks present on the islands have been grouped into lithotypes based on similar geo-mechanical behaviour. The laboratory test results obtained for these lithotypes establish their suitability or not to be used as breakwater material in accordance with Spanish regulations.En el archipiélago canario existe un amplio espectro de rocas volcánicas con diferentes propiedades para ser utilizadas en obras públicas. El objetivo de este estudio es analizar las propiedades físico-mecánicas de todas las rocas volcánicas presentes en el archipiélago canario con el fin de determinar su idoneidad para ser utilizadas en obras de construcción marítima. La gran variedad de rocas volcánicas presentes en las islas, se han agrupado en litotipos basados en un comportamiento geomecánico similar. Los resultados de los ensayos de laboratorio obtenidos para estos litotipos establecen su idoneidad o no para ser utilizados como material de escollera de acuerdo con la normativa española

Lignocellulose Nanofibre Obtained from Agricultural Wastes of Tomato, Pepper and Eggplants Improves the Performance of Films of Polyvinyl Alcohol (PVA) for Food Packaging

Films formulated with polyvinyl alcohol (PVA) (synthetic biopolymer) were reinforced with lignocellulose nanofibres (LCNF) from residues of vegetable production (natural biopolymer). The LCNF were obtained by mechanical and chemical pre-treatment by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) and added to the polyvinyl alcohol (polymer matrix) with the aim of improving the properties of the film for use in food packaging. The mechanical properties, crystallinity, thermal resistance, chemical structure, antioxidant activity, water barrier properties and optical properties (transparency and UV barrier), were evaluated. In general, with the addition of LCNF, an improvement in the studied properties of the films was observed. In terms of mechanical properties, the films reinforced with 7% LCNF TEMPO showed the best results for tensile strength, Young’s modulus and elongation at break. At the same LCNF proportion, the thermal stability (Tmax) increased between 5.5% and 10.8%, and the antioxidant activity increased between 90.9% and 191.8%, depending on the raw material and the pre-treatment used to obtain the different LCNF. Finally, a large increase in UV blocking was also observed with the addition of 7% LCNF. In particular, the films with 7% of eggplant LCNF showed higher performance for Young’s modulus, elongation at break, thermal stability and UV barrier. Overall, results demonstrated that the use of LCNF generated from agricultural residues represents a suitable bioeconomy approach able to enhance film properties for its application in the development of more sustainable and eco-friendly food packaging systems