Non-Hamiltonian Actions and Lie-Algebra Cohomology of Vector Fields

Two examples of $\mathrm{Diff}^+S^1$-invariant closed two-forms obtained from forms on jet bundles, which does not admit equivariant moment maps are presented. The corresponding cohomological obstruction is computed and shown to coincide with a nontrivial Lie algebra cohomology class on $H^2(\mathfrak{X}(S^1))$

Modelos organizativos de la nueva economía

El Trabajo de Fin de Grado expuesto a continuación se encuentra orientado hacia el análisis de los modelos organizativos de las empresas y la evolución de estos hacia los denominados modelos organizativos de “Nueva Economía”. De forma más específica, y con el objetivo de definir el extenso concepto relacionándolo con las transformaciones a escala mundial que han llevado a las organizaciones a adaptarse, nos centraremos en analizar la importancia de las nuevas tecnologías y la globalización en dichos cambios, relacionándolo de esta forma con la transición entre los modelos organizativos. A su vez, analizaremos el impacto de la actual situación en la dirección y RR.HH. obteniendo así una visión global de todos los sistemas empresariales originados por la nueva situación económica y social. Para finalizar el análisis, se expondrá un caso de estudio donde se analizarán los puntos expuestos sobre un caso práctico y tangibleThe Final Degree Project here exposed is oriented towards the analysis and study of the organizational models of the companies linked with their evolution into the known as “New Economy” models. Specifically, and with the objective of defining such a wide concept, we will focus the study into the analysis of the relevance of new technologies and globalization with the changes suffered by the models, defining in this way the transition of the structural deigns in the companies. Likewise, the effect of the changes previously mentioned into the governance and H.R. will be studied obtaining a global picture of the new models born with the current situation in economic and social terms. To summarize the analysis, a case study will be exposed obtaining by it a more tangible view of the ideas and points reviewed in the current work.Departamento de Organización de Empresas y Comercialización e Investigación de MercadosGrado en Administración y Dirección de Empresa

Ressenyes

Index de les obres ressenyades: Gavin MENZIES, 1421. El año en que China descubrió el Mund

La espacialización de la Cultura Ciudadana en Cochabamba como estrategia para evitar la progresiva destrucción del hábitat popular

Un ciudadano libre y responsable es ante todo alguien que actúa con plena conciencia y libre albedrío sobre la base de sus derechos y deberes. Su responsabilidad supone que tiene un papel que cumplir en la construcción de ciudadanía, en la creación y consolidación de relaciones sociales basadas en la confianza, en la tolerancia y en el respeto por los demás. A partir de esto, se realiza un diagnóstico de la cultura ciudadana detectando zonas con determinados comportamientos negativos o positivos. Construir y sistematizar información temática georeferenciada respecto a las diferentes actitudes del habitante urbano permite generar insumos que coadyuven a la gestión pública a generar planes y programas para planificación urbana más sostenible y acorde con el comportamiento ciudadano.Peer Reviewe

Biocontrol of root and crown rot in tomatoes under greenhouse conditions using Trichoderma harzianum and Paenibacillus lentimorbus. Additional effect of solarization

Indexación: ScieloTrichoderma harzianum 650 (Th650) and Paenebacillus lentimorbus 629 (Pl629) selected earlier for their ability to control Rhizoctonia solani, Fusarium solani and F. oxysporum in vitro, were applied alone or combined with solarization (summer assay) and/or with methyl bromide (MeBr) (summer and winter assays) to a soil with a high inoculum level, for the control of tomato root rot caused by the complex F. oxysporum f. sp. lycopersici - Pyrenochaeta lycopersici - Rhizoctonia solani. Evaluations were also performed independently for root damage caused by P. lycopersici, and also for R. solani in the summer assay. MeBr decreased tomato root damage caused by the complex from 88.7% to 21.2% and from 78.4% to 35.7% in the summer and in the winter assay, respectively. None of the bio-controllers could replace MeBr in the winter assay, but Th650 and Pl629 reduced root damage caused by this complex in the summer assay. Treatments with bio-controllers were improved by their combination with solarization in this season. Independent evaluations showed that the positive control of Th650 towards R. solani and the lack of effect on P. lycopersici correlates well with the endochitinase pattern expressed by Th650 in response to these phytopathogens. Root damage caused by R. solani can be controlled at a similar level as it does MeBr in summer assays, thus representing an alternative to the use of this chemical fungicide for the control of this phytopathogen.Financial support: Fondecyt 1990785

The competitiveness of Spanish tomato export in the European Union

This paper examines the export performance of Spanish tomatoes in the European Union (EU). The origins and destinations of Spanish tomato exports are examined: Almeria is the main exporting province and Germany the biggest client. The performance of Spain’s North African competitors in the tomato market (mainly Morocco) is also examined, and the structural competitiveness of the countries that export tomatoes to the EU is analysed. Spain has the greatest advantage in this respect, and the largest inter-industry trade. An export model is developed. This model shows that the export of tomatoes from Almeria is not much influenced by shipments from Morocco.trade, price, competition, cointegration, Almería, strategy

Stabilization of Polymeric Nanofibers Layers for Use as Real-Time and In-Flow Photonic Sensors

In order to increase the sensitivity of a sensor, the relationship between its volume and the surface available to be functionalized is of great importance. Accordingly, porous materials are becoming very relevant, because they have a notable surface-to-volume ratio. Moreover, they offer the possibility to infiltrate the target substances on them. Among other porous structures, polymeric nanofibers (NFs) layers fabricated by electrospinning have emerged as a very promising alternative to low-cost and easy-to-produce high-performance photonic sensors. However, experimental results show a spectrum drift when performing sensing measurements in real-time. That drift is responsible for a significant error when trying to determine the refractive index variation for a target solution, and, because of that, for the detection of the presence of certain analytes. In order to avoid that problem, different chemical and thermal treatments were studied. The best results were obtained for thermal steps at 190 °C during times between 3 and 5 h. As a result, spectrum drifts lower than 5 pm/min and sensitivities of 518 nm/refractive index unit (RIU) in the visible range of the spectrum were achieved in different electrospun NFs sensors.This work was supported by the Spanish government through the project TEC2015-63838-C3-1-ROPTONANOSENS and from the Basque government through the project KK-2019/00101 -µ4INDUSTR