Collective Bargaining under Complete Information

In this paper, we build and structurally estimate a complete information bargaining model of collective negotiation for Spain. For large firms, the assumption of complete information seems a sensible one, and it matches the collective bargaining environment better than the one provided by private information models. The specification of the model with players having different discount factors allows us to measure their relative bargaining power, a recurrent question in the theory of bargaining. We find that both entrepreneurs and workers have high discount factors, and no evidence that entrepreneurs have bigger bargaining power as usually assumed.Delays, sequential bargaining, structural estimation

Evaluación de catalizadores de óxido de zinc y su actividad catalítica en la reacción de transesterificación para la producción de biodiésel

Con el fin de obtener un mayor rendimiento en la producciónde biodiésel, comparado con el obtenido en estudios previos(1), se sintetizaron catalizadores de óxido de zinc empleando los métodos de impregnación y sol-gel. En el primero, se utilizaron como soportes catalíticos, -Al2O3 y la zeolita Faujasita Y, variando diferentes parámetrostales como concentración de la solución y tiempo de impregnación; la sal escogida para realizar la impregnación fue cloruro de zinc (ZnCl2). En la técnica sol-gel se empleó como precursor un alcóxido, acetato de zinc,[Zn(CH3COO)2], en la cual la relación molar acetato: agua y el pH de la solución fueron las variables seleccionadas.Los catalizadores se caracterizaron por difracción de rayos X, espectroscopía de absorción atómica, análisis termogravimétrico y fisisorción de nitrógeno a 77K. La reacción de ansesterificación se llevó a cabo en un reactor con chaqueta de calentamiento a una temperatura de 55 °C y a presión atmosférica por un período de 6 horas; la relación molar aceite-metanol fue 1:40y el porcentaje de catalizador fue del 5 % w/w con respectoal aceite de palma. El mayor rendimiento de biodiésel se obtuvo empleando el catalizador soportado en -Al2O3 con un tiempo de impregnación de 24 h, una concentración de ZnCl2 1M, alcanzando un área superficial de 133 m2/g y una distribución básicamente mesoporosa

Artificial Intelligence in Airport Security: How AI Can Increase Airport Safety?

Artificial Intelligence has boomed in recent years. There have been a lot of various implementations that different fields implemented to their advantage. In its nature, aviation is a field in which security is required. One of the ways it is more visible for passengers is while transiting through airports. From the Transportation Security Administration, also known as TSA, to different immigration controls, the sense of security and protocols are latent. The more technology advances, the more opportunities there are for artificial intelligence to help improve the process and the way airport security works and increase air travel safety by making it more redundant

Analysis of safety-based incentives in public private partnerships. The case of Spain

OUTLINE: • Introduction • Experimental Setup • Experimental Procedure • Experimental Results - Surface Roughness - Residual Stresses - Friction - Wear - EDX • Conclusion

Gereja dan Pendidikan Seni Musik Bagi Anak

The purpose of this study is to understand the importance of carrying out music education by the church. This study explains the importance of art education for humans, the life of art in church and the process of art education that has been occurred in church. In particular, this study reminds us that church should not ignore music education in the church in an effort to maintain the church traditions

Mechanical properties enhancement of high reliability metallic materials by laser shock processing

Laser shock processing (LSP) is being increasingly applied as an effective technology for the improvement of metallic materials surface properties in different types of components as a means of enhancement of their corrosion and fatigue life behavior. As reported in previous contributions by the authors, a main effect resulting from the application of the LSP technique consists on the generation of relatively deep compression residual stresses field into metallic alloy pieces allowing an improved mechanical behaviour, explicitly the life improvement of the treated specimens against wear, crack growth and stress corrosion cracking. Additional results accomplished by the authors in the line of practical development of the LSP technique at an experimental level (aiming its integral assessment from an interrelated theoretical and experimental point of view) are presented in this paper. Concretely, follow-on experimental results on the residual stress profiles and associated surface properties modification successfully reached in typical materials (especially Al and Ti alloys) under different LSP irradiation conditions are presented along with a practical correlated analysis on the protective character of the residual stress profiles obtained under different irradiation strategies and the evaluation of the corresponding induced properties as material specific volume reduction at the surface, microhardness and wear resistance. Additional remarks on the improved character of the LSP technique over the traditional “shot peening” technique in what concerns depth of induced compressive residual stresses fields are also made through the paper

Laser Shock Processing: An Emerging Technique for the Enhancement of Surface Properties and Fatigue Life of High Strength Metal Alloys

Profiting by the increasing availability of laser sources delivering intensities above 10 9 W/cm 2 with pulse energies in the range of several Joules and pulse widths in the range of nanoseconds, laser shock processing (LSP) is being consolidating as an effective technology for the improvement of surface mechanical and corrosion resistance properties of metals and is being developed as a practical process amenable to production engineering. The main acknowledged advantage of the laser shock processing technique consists on its capability of inducing a relatively deep compression residual stresses field into metallic alloy pieces allowing an improved mechanical behaviour, explicitly, the life improvement of the treated specimens against wear, crack growth and stress corrosion cracking. Following a short description of the theoretical/computational and experimental methods developed by the authors for the predictive assessment and experimental implementation of LSP treatments, experimental results on the residual stress profiles and associated surface properties modification successfully reached in typical materials (specifically steels and Al and Ti alloys) under different LSP irradiation conditions are presente

Responsabilidad Social y Ciudadanía: Una perspectiva desde la universidad y la administración pública

La importancia de los estudios sobre ciudadanía se vincula con la imperiosa necesidad de fortalecer la democracia en todos aquellos espacios donde se manifiesta, principalmente en países como México, donde la falta de credibilidad en las instituciones democráticas ha permeado a la sociedad.Los desafíos contemporáneos requieren nuevos ajustes en diversos sentidos; al interior de las organizaciones es necesario adecuar los mecanismos con que interactúan frente a la sociedad en la que se desarrollan. Es requisito indispensable que el grueso de las organizaciones sociales se vinculen de manera directa con los problemas globales y nacionales: cambio climático, guerras, exigencias democráticas, movimientos sociales, pobreza, desempleo, inestabilidades políticas etc., ello les exige que se asuman como parte del complejo social, donde sus acciones repercuten de forma directa o indirecta