Productive Capital and Technical Efficiency in the UE-15

In this research we examine the capitalization process in the UE-15 with the aim to establish if the evolution manteined in the last two decades for the public capital and its distribution related private capital have conditioned the technical efficiency of the European economies. In this analysis we use the frontier function approach that allows to consider an inefficiency use of the productive factors. Specifically, we employ the parametric stochastic frontier model from Battese and Coelli (1995) to explore the determinants of the technical efficiency. The results show that larger endowments of public capital may facilitate the access of the productive activity to the levels of the more efficient members. We also find a limit to the capacity of introducing improvements in the use of productive factors, and it is related to private capital, then if the increase of public capital does not lead to an optimal distribution of this factor, the effect on efficiency will be negative.

Analysis of Balmer Profiles of early type stars

The spectral energy distribution (SED) of recent star formation regions is dominated by the more massive and early stars (O and B types). These stars show large and very significant absorption features, the most prominent being the recombination lines of H, HeI and HeII. In particular, the shape of their profiles are very dependent on the luminosity of the star. We have explored the potential use of high resolution profiles to discriminate between different luminosity classes and spectral types, by using profiles of the He and Balmer lines. We have calculated growth curves for each of the lines and their dependence on gravity and effective temperature. We show some of these theoretical growth curves and our preliminary conclusions are analyzed and discussed.Comment: 1 pag, Contribution to the conference "Cosmic Evolution and Galaxy Formation: Structure, Interactions and Feedback", Nov. 1999 (Puebla, Mexico), to be published in ASP. Conf. Series, Eds. J. Franco, E. Terlevich. O. Lopez-Cruz, I. Aretxag

Integration brings convergence? The role of public and human capital

This work decompose labor-productivity grotwh and convergence in EU into components attributable to technological change (shifts in the European production frontier), technological catch-up (movements toward or away from the frontier) and factor accumulation (movement toward or away from the frontier). This work extends previous researchs considering public capital and human capitas as additional productive inputs and analysing its separate constribution to convergence as components of factor accumulation. In the case of human capital, we also test its rate effect as determinant factor of technical change. With this purpose we applied the Malmquist index of total factor productivity to an European data base to provide evidence for the 15 EU State Members. The results show that growth is primarily driven by factor accumulation which contribution is fundamental for lagging countries. We do not find evidence of any significant convergence over the whole period studied related to integration with factor accumulation and efficiency change as important factors of convergence while technical change (encouraged by greater human capital) has worked against it. Key words: Human Capital, Malmquist Index, Source of Convergence. JEL Classification: O47 H54 D24

Statistical Model Checking of e-Motions Domain-Specific Modeling Languages

Domain experts may use novel tools that allow them to de- sign and model their systems in a notation very close to the domain problem. However, the use of tools for the statistical analysis of stochas- tic systems requires software engineers to carefully specify such systems in low level and specific languages. In this work we line up both sce- narios, specific domain modeling and statistical analysis. Specifically, we have extended the e-Motions system, a framework to develop real-time domain-specific languages where the behavior is specified in a natural way by in-place transformation rules, to support the statistical analysis of systems defined using it. We discuss how restricted e-Motions sys- tems are used to produce Maude corresponding specifications, using a model transformation from e-Motions to Maude, which comply with the restrictions of the VeStA tool, and which can therefore be used to per- form statistical analysis on the stochastic systems thus generated. We illustrate our approach with a very simple messaging distributed system.Universidad de Málaga Campus de Excelencia Internacional Andalucía Tech. Research Project TIN2014-52034-R an

Productive Capital and Technical Efficiency in the UE-15

In this research we examine the capitalization process in the UE-15 with the aim to establish if the evolution manteined in the last two decades for the public capital and its distribution related private capital have conditioned the technical efficiency of the European economies. In this analysis we use the frontier function approach that allows to consider an inefficiency use of the productive factors. Specifically, we employ the parametric stochastic frontier model from Battese and Coelli (1995) to explore the determinants of the technical efficiency. The results show that larger endowments of public capital may facilitate the access of the productive activity to the levels of the more efficient members. We also find a limit to the capacity of introducing improvements in the use of productive factors, and it is related to private capital, then if the increase of public capital does not lead to an optimal distribution of this factor, the effect on efficiency will be negative

Experimental measurement of endocytosis in fungal hyphae.

The present study examines the notion that polarized exocytosis in the tips of growing hyphae creates an excess of plasma membrane and thus the need for its removal by endocytosis. To measure endocytosis experimentally, we developed a photobleaching (FRAP) procedure to count endocytic events in hyphae of Neurospora crassa carrying a fluorescent tag on the actin-binding protein fimbrin (FIM-1-GFP). Given 40 nm as the average diameter of endocytic vesicles, we calculated that about 12.5% of the plasma membrane discharged in the apex becomes endocytosed in the subapex. According to our calculations, the GFP-tagged hyphae of N. crassa, measured under the constrained conditions of confocal microscopic examination, needed about 8800 vesicles/min to extend their plasma membrane or about 9800/min, if we include predicted demands for cell wall growth and extracellular secretion. Our findings support the notion that exocytosis and endocytosis operate in tandem with the latter serving as a compensatory process to remove any excess of plasma membrane generated by the intense exocytosis in the hyphal tips. Presumably, this tandem arrangement evolved to support the hallmark features of fungi namely rapid cell extension and abundant secretion of hydrolytic enzymes

“Evaluación económica sectorial de la inversión en la red viaria de gran capacidad: la evidencia de los efectos desbordamiento”

La red viaria de gran capacidad constituye un instrumento fundamental de vertebración territorial que genera importantes efectos económicos. Son escasos, sin embargo, los trabajos dedicados a su análisis, principalmente por la falta de series de este tipo de capital con cobertura temporal y geográfica suficiente. En este documento se ha utilizado una estimación de este componente del capital público productivo, realizada por las autoras para las regiones españolas, desde el año 1970 hasta el 1998, para evaluar el impacto económico sectorial de esta infraestructura. Los resultados muestran el positivo y significativo impacto de este equipamiento en el sector privado de la economía, siendo las actividades agrarias y las industriales las que se han beneficiado del desarrollo de esta infraestructura en España.Red de Gran Capacidad; Capital Público; Método del Inventario Permanente

Transition from SU(2)_L x SU(2)_R x U(1)_(B-L) Representation to SU(2)_L x U(1)_Y by q-Deformation and the Corresponding Classical Breaking Term of Chiral U(2)

The minimal Standard Model exhibits a nontrivial chiral U(2) symmetry if the vev and the hypercharge splitting (Delta) of right-handed leptons (quarks) in a family vanish and Q=T_0 + Y independently in each helicity sector. As a generalization, we start with SU(2)_L x SU(2)_R x U(1)_{(B-L)} and introduce Delta as a continuous parameter which is a measure of explicit symmetry breakdown. Values of Delta between zero and 1/2 take the neutral generator of the isospin-1/2 representation to the singlet representation, i.e. `deformes' the LR representation into the minimal Standard one. The corresponding classical O(3)-breaking term is a magnetic field perpendicular to the x_3-axis. A simple mapping on the fundamental Drinfeld-Jimbo q-deformed SU(2) representation is given.Comment: DESY 94-129, 12 page