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18 páginas.- 9 figuras.- 3 tablas.- 46 referencias, Deficit irrigation scheduling is becoming increasingly important under commercial conditions. Water status measurement is a useful tool in these conditions. However, the information about water stress levels for olive trees is scarce. The aim of this experiment was to evaluate the effect on yield of a moderate controlled water stress level at the end of the irrigation season. The experiment was conducted in the experimental farm of La Hampa (Coria del Río, Seville, Spain) during three years. A completely randomized block design was performed using three different irrigation treatments. Deficit irrigation was applied several (4 or 2) weeks before harvest. Irrigation was controlled using the midday stem water potential, with a threshold value of −2 MPa and compared with a full irrigated treatment. This water stress did not reduced gas exchange during the deficit period. The effect on yield was not significant in any of the three seasons. In the high-fruit load season, fruit volume was slightly affected (around 10%), but this was not significant at harvest. Results suggest an early affection of fruit growth with water stress, but with a slow rate of decrease. Moderate water stress could be useful for the management of deficit irrigation in table olive trees., This research was supported by the Agencia Española de Investigación (AEI) and the Fondo Europeo de Desarrollo (FEDER) projects AGL2013-45922-C2-1-R and AGL2016-75794-C4-4-R.

9 páginas.- 11 tablas.- 43 referencias, Sustainability is a feature that most companies adopt in order to improve their profits, even when their activity is not sustainable or the definition in their sector is not clear. This concept actually relates to the management of natural resources. Agriculture, and particularly irrigation scheduling, is strongly linked to a sustainable management; however, it is not clear what defines a sustainable management. Several efforts have been made to improve the conservation of water resources, but most of them have not involved growers at the orchard level; and consequently, they have lost their opportunity to create a real improvement in terms of sustainability. The aim of this work was to design a “hydroSOStainable index” (or “hydroSOS index”) that evaluates different aspects at orchard level to improve the sustainability of the water resources. The hydroSOS index considers 16 indicators grouped in 4 areas: (i) hydraulic indicators, (ii) horticultural indicators not related to irrigation scheduling, (iii) horticultural indicators related to the moment when deficit irrigation is applied (when?), and (iv) horticultural indicators related to the way deficit irrigation is applied (how?). Each indicator provides different marks or scores, and their sum allows classifying orchard management into four labels. The weight of each indicator and each group is not in itself enough to obtain a maximum label. Groups allow to easily identify the main limitations for the orchard to achieve a sustainable irrigation management. This index was used to evaluate water management of two cases of study. © 2019 Elsevier B.V., This research was supported by the Agencia Española de Investigación (AEI) and the Fondo Europeo de Desarrollo (FEDER) projects AGL2013-45922-C2-1-R and AGL2016-75794-C4-4-R . It also received the financial support of the Galpagro company (Fundación para la investigación de la Universidad de Sevilla project PRJ201702989 ).

9 páginas.-- 12 figuras.- 1 tabla.- 44 referencias, Reduced water availability around the world drives the need for indicators that enable a better control of water stress at orchard level. Among the different parameters that could be used as indicators, trunk diameter fluctiations, are daily cycles suggested as tools for irrigation scheduling. These cycles can define different indicators and the trunk growth rate (TGR) was suggested as the most suitable for olive trees. Several works indicated that average TGR values are related to the tree water status even threshold values have been suggested. In addition, only daily TGR values below −0.1 mm day−1 were mentioned as water stress indicators. The aim of this work is to evaluate an irrigation scheduling approach based on those two results mentioned. To this end, an experiment was performed during the 2017 season, in a commercial, super-high-density orchard in Carmona (Seville, Spain). Four different irrigation treatments were applied based on midday stem water potential values and TGR. The Control treatment, with 100% ETc (crop evapotranspiration) and sustained deficit irrigation, was compared with two regulated deficit irrigation strategies based on TGR measurements. Severe water stress conditions were measured in the three deficit treatments. Irrigation scheduling using average TGR was not a suitable tool for the aim of the experiment because some data were lost and there were great variations in TGR values. However, it was found that average TGR values were related to midday stem water potential. The water potential and daily TGR data were grouped according to water stress levels (into values with water potential higher of −1.4 MPa and lower than −4 MPa). Daily TGR values greater than 0.3 mm day−1 were identified in response to severe water stress conditions. Weekly frequency of daily TGR values between −0.1 and 0.3 mm day−1 decreased from 60% to 25% when water stress level increased. Therefore, frequency and value of daily TGR are suggested as irrigation scheduling tools for olive trees. © 2019, This research was supported by the Agencia Española de Investigación (AEI) and the Fondo Europeo de Desarrollo (FEDER) project AGL2016-75794-C4-4-R

9 páginas.-- 10 figuras.-- 3 tablas.-- 32 referencias, Irrigation needs in mature almond orchards are very high. Although almond trees grow in rainfed conditions, the yield response is very sensitive to irrigation. Continuous monitoring of the water status could be an adequate tool to optimize deficit irrigation. In this sense, trunk diameter fluctuations appeared as a very promising indicator at the beginning of the century, but few data have been published. The aim of this work is to check threshold values of maximum daily shrikage (MDS) and identify possible limitations to their use in commercial orchards. The experiment was performed in a commercial farm in Dos Hermanas (Seville, Spain) during the 2017 season on a 7-years-old orchard (cv Vairo). The irrigation treatments were Control (100% ETc), sustained deficit irrigation (SDI) with a maximum seasonal irrigation of 100 mm and two regulated deficit treatments (RDI). Both RDI treatments (RDI-1 and RDI-2) were scheduled using the signal of maximum daily shrinkage (signal) and the midday stem water potential (SWP). In RDI-1, full irrigation conditions were provided before kernel filling and during postharvest, using the threshold values suggested in the bibliography. During kernel filling, the water stress level was designed to be -1.5 MPa (SWP) and 1.75 (signal). RDI-2 trees were irrigated using the same scheduling as RDI-1, but target water stress values were higher in kernel filling (-2 MPa and 2.75) and with a maximum seasonal amount of water of 100 mm. SWP in Control trees was near the McCutchan and Shackel baseline for most of the season. None of the deficit treatments reached the signal values suggested. Moreover, the signal values were almost equal between treatments, with no water stress effect. The trunk growth rate (TGR) presented clear differences depending on the water status., This research was supported by the Agencia Española de Investigación (AEI, Ministerio de Ciencia, Innovación y Universidades) and the Fondo Europeo de Desarrollo (FEDER) project AGL2016-75794-C4-4-R. Authors thank to Finca La Florida for their helpful assistance during the experiment, specially to Mr Carlos Angulo.

En este trabajo se ha examinado el peso que ha adquirido la función de comunicación de los museos a lo largo del tiempo, así como la incorporación, evolución y auge de las Nuevas Tecnologías y su aplicación en estos centros culturales. Se estudia, asimismo, las trasformaciones que han tenido lugar en los museos castellano leoneses durante los últimos quince años y, en particular, el estado de la comunicación online de los mismos, mediante la construcción de un indicador de calidad para las páginas web y el análisis de la presencia de los museos en las redes sociales. Asimismo, se proporcionan las herramientas adecuadas para mejorar la estrategia de comunicación de los museos utilizando los sistemas de monitorización que incorporan las webs y redes sociales como Google Analytics, Twitter Analytics o las analíticas de Facebook., Departamento de Historia del Arte, Doctorado en Patrimonio Cultural y Natural. Historia. Arte y Territorio, 2020-09-01

Trabalho Final do Curso de Mestrado Integrado em Medicina, Faculdade de Medicina, Universidade de Lisboa, 2018 Submitted by Sofia Amador (sofiamador@fm.ul.pt) on 2020-02-18T14:43:11Z No. of bitstreams: 1 BeatrizCFeria.pdf: 899698 bytes, checksum: 34c1c5455f1aaa65667872751ce21c1f (MD5) Made available in DSpace on 2020-02-18T14:57:52Z (GMT). No. of bitstreams: 1 BeatrizCFeria.pdf: 899698 bytes, checksum: 34c1c5455f1aaa65667872751ce21c1f (MD5) Previous issue date: 2018

Este tesis pretenden modelizar los factores que determinan la demanda y los precios de exportación de vino de los países europeos hacia los países extracomunitarios. Para ello se ha analizado el comercio internacional del vino tratando de encontrar aquellas variables macroeconómicas que influyen en la evolución del precio y de la demanda del vino procedente de la Unión Europea en terceros países. La investigación se centrará en la demanda extracomunitaria porque es donde se alcanzan los precios más elevados. El segundo objetivo ha consistido en analizar las consecuencias que tiene la existencia de diversas estrategias de comercialización territoriales del vino español en los mercados internacionales. Para lo que ha estudiado el comportamiento de las distintas CC.AA exportadoras de vino, buscando la existencia de patrones comunes que permitan definir uno o varios modelos de exportación. Para ello se ha utilizado la metodología de datos de panel y de análisis de correspondencia., Departamento de Economía Aplicada, Doctorado en Economía

El objetivo de esta tesis es aplicar a una selección de empresas pertenecientes a los principales índices bursátiles de la Unión Europea los modelos de valoración de empresas. Se plantea el cálculo del valor de la empresa según dos métodos de valoración basados en el descuento de flujos. El primer método se basa en que el coste de capital es constante en todo el horizonte temporal, mientras que en el segundo método hay una relación entre la rentabilidad que esperan obtener los accionistas y el valor de la empresa, lo cual provoca circularidad. Se determinan los flujos de caja partiendo del EBITDA y hallando las ratios de las variables respecto a los ingresos de explotación. Se contrastan empíricamente los dos modelos calculando el error que se comete al utilizar un método u otro aceptando como valor de una empresa la cotización., Departamento de Economía Financiera y Contabilidad