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Els fets de maig de 1937 a Lleida. La perspectiva d’UHP

  • Royo Campo, Albert
Es tracta d’un estudi parcial de la temàtica exposada que s’ha tractat des de la perspectiva socialista del PSUC i del seu sindicat, la UGT. Per fer-ne l’ànàlisi, s’ha hagut d’anar a consultar l’òrgan de comunicació a Lleida, el diari UHP. La consigna principal que el diari reiterà dia rere dia era la de mantenir una rereguarda unida, sense conflictes i preparada per ajudar el front. D’altra banda, l’atac i la veritable ironia d’entendre el POUM com una força revolucionària va ser l’altra constant del moment. Es fa, doncs, un exercici enfocat des d’una perspectiva que, però, no impedeix comprendre les altres. Útil per observar les relacions entre les diverses tendències polítiques i treballadores de Lleida i per aclarir el panorama social i polític d’uns mesos molt conflictius.
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Les terres de Lleida i la División Azul

  • Royo Campo, Albert
Es tracta d’un estudi parcial i introductori en què s’intenta copsar l’experiència dels lleidatans a la División Azul emprant els estudis realitzats anteriorment i una valoració personal extreta de la consulta del diari falangista La Mañana. La consulta hemerogràfica propicia un nou aire a l’estudi desmarcant-se així dels ja realitzats sobre el tema. A més, procura interrelacionar el fet dels lleidatans divisionaris amb la postura i el paper jugat per la Falange a Lleida i pel règim franquista en general respecte de la División. Així doncs, l’experiència viscuda es difumina amb el caràcter general del règim, la qual cosa proporciona una visió més lligada amb el context espanyol i europeu del moment, que facilita una major comprensió del fenomen.
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Setting the optimal length to be scanned in rows of vines by using mobile terrestrial laser scanners

  • Arnó Satorra, Jaume
  • Escolà i Agustí, Alexandre
  • Rosell Polo, Joan Ramon
Mapping the leaf area index (LAI) by using mobile terrestrial laser scanners (MTLS) is of significance for viticulture. LAI is related to plant vigour and foliar development being an important parameter for many agricultural practices. Since it may present spatial variability within vineyards, it is very interesting monitoring it in an objective repeatable way. Considering the possibility of using on-the-go sensors such as MTLS within an agricultural plot, it is necessary to set a proper length of the row to be scanned at each sample point for a reliable operation of the scanner. Three different row length sections of 0.5, 1, and 2 m have been tested. Data analysis has shown that models required to estimate LAI differ significantly depending on the scanned length of the row; the model required to estimate LAI for short sections (0.5 m) is different from that required for longer sections (1 and 2 m). Of the two models obtained, we recommend using MTLS for scanning row length sections of 1 m because the practical use of the sensor in the field is simplified without compromising the results (there is little variation in the model when the row length section changes from 1 to 2 m). In addition, a sufficient number of sampling points is obtained to support a map of the LAI. Linear regression models using as explanatory variable the tree area index, obtained from the data provided by the scanner, are used to estimate the LAI., The authors acknowledge funding from the Spanish Ministry of Science and Education (OPTIDOSA research project, AGL2007-66093-C04-03) and the ERDF (European Regional Development Fund). The agreement with Codornıu allowing the use of the vineyard in Raimat is also acknowledged
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Climate change influence on runoff and soil losses in a rainfed basin with Mediterranean climate

  • Ramos Martín, Ma. C. (Ma. Concepción)
  • Martínez Casasnovas, José Antonio
The present research shows the results of possible effects of climate change on runoff and soil loss in a rainfed basin located in the Alt PenedSs and Anoia region (NE Spain). Viticulture is an important economic activity in this region, and vines for the production of high-quality wines and 'cavas' are the main land use. Climate data for the period 2000-2012 and detailed soil and land use maps were used as input data for soil and water assessment tool to model the effects of climate change. The analysis compared simulated results for years with different climatic conditions during that period with predicted temperature and precipitation data for 2020, 2050 and 2080 based on data obtained from the Hadley Centre Coupled Model, version 3, A2 scenario and the trends observed in the area. The research confirmed the difficulty of predicting future soil loss in this region, which has very high inter-annual climate variability. Despite only small changes in precipitation, the model simulated a decrease in soil loss associated with a decrease in runoff, mainly driven by an increase in evapotranspiration. However, the trend in soil losses may vary when changes in precipitation balance the increase in evapotranspiration and when rainfall intensity increases. An increase in maximum rainfall intensity in spring and autumn (main rainy seasons) produced significant increases in soil loss: as high as 12 % for the 2020 scenario and 57 % for the 2050 scenario., This work is a part of research project AGL2009-08353 funded by the Spanish Ministry of Science and Innovation.
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Soil alteration due to erosion, ploughing and levelling of vineyards in north east Spain

  • Martínez Casasnovas, José Antonio
  • Ramos Martín, Ma. C. (Ma. Concepción)
Since the 1970s and 1980s, the vineyard areas in the Mediterranean region of north east Spain have undergone profound transformation to allow greater mechanization. This has involved land levelling, deep ploughing and the elimination of traditional soil conservation measures. Recently the EU Common Agricultural Policy encourages this through the vineyard restructuring and conversion plans (Commission Regulation EC No 1227 ⁄ 2000 of 31 May 2000) by subsidizing up to 50% of the cost of soil preparation such as soil movement and land levelling. A clear example of the problems that this causes is in the Penede`s vineyard region (Catalonia, north east Spain), and the present research analyses the changes in soil properties caused by erosion, deep ploughing and land levelling. The study was carried out in an area of 30 000 ha for which a Soil Information System at a scale of 1:50 000 was developed based on 394 field observations (89 soil profiles and 251 auger hole samples down to 120 cm). The results show that 74% of the described soil profiles are disturbed with evidence of soil mixing and ⁄ or profile truncation due to erosion, deep ploughing and ⁄ or land levelling. The evidence from the topsoils is mainly the presence of fragments of calcic or petrocalcic horizons, marls and sandstones. Other important properties for crops such as organic matter (OM) content and soil depth show statistically significant differences between disturbed soils and undisturbed soils (22.3-33.3% OM content depletion and 35.1% soil depth reduction). These results confirm that the soils of the region are significantly altered by mechanical operations which also influence soil erosion and contribute to global warming effect through depletion of soil OM.
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Post-storage cell wall metabolism in two sweet cherry (Prunus avium L.) cultivars displaying different postharvest performance

  • Belge, Burcu
  • Comabella, Eva
  • Graell i Sarle, Jordi
  • Lara Ayala, Isabel
The biochemical processes underlying firmness loss of sweet cherry (Prunus avium L.) fruit are poorly understood.Studies on cell wall metabolism of sweet cherry have been generally undertaken during on-tree development or at harvest maturity, while published reports on postharvest changes are scarce and fragmentary. In this work, cell wall modifications after storage at 0 ºC were studied in two cherry cultivars ('Celeste' and 'Somerset') displaying different postharvest potential. Firmness was largely determined by the yields of the Na2CO3- and KOH-soluble fractions, enriched in covalently-bound pectins and in matrix glycans, respectively, and correlated well with ascorbic acid contents. The yields of these two cell wall fractions were correlated inversely with pectinmethylesterase and endo-1,4-b-D-glucanase activities, indicating a relevant role of these two enzymes in postharvest firmness changes in sweet cherry. The amount of solubilised cell wall materials was closely associated to the contents of dehydroascorbic acid, suggesting the possible involvement of oxidative mechanisms in cell wall disassembly. These data may help understanding the evolution of fruit quality during the marketing period, and give hints for the design of suitable management strategies to preserve key attributes., B. B. is the recipient of a FI-DGR grant from AGAUR (Generalitat de Catalunya). This work was supported through the AGL2010-14801/ALI project, funded by the Ministerio de Ciencia. e Innovación (MICINN) of Spain. Fruit samples were provided by J. M. Camats (Cireres de Corbins Camats-Carpi).
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Noves lemnàcies al riu Segre

  • Conesa i Mor, Josep A. (Josep Antoni)
  • Galán de Mera, Antonio
  • Pedrol Solanes, Joan
La dinàmica fluvial, basada en revingudes sobtades, provoca intenses pertorbacions que afecten l’estructura de les comunitats vegetals associades i els processos ecològics (Naiman & Décamps, 1997; Forman & Godron, 1986). A banda d’aquests efectes de caire natural cal considerar també les diverses actuacions i activitats de caire antròpic que es donen principalment a la plana d’inundació com ara les que deriven de l’acumulació de residus, conreus i nuclis habitats a tocar del canal fluvial. Totes aquestes activitats tenen el denominador comú d’afavorir la introducció de plantes afavorides pels usos agrícoles i ornamentals originàries d’altres regions que després d'un període de temps variable solen esdevenir en la majoria de les ocasions espècies invasores a l'interaccionar negativament amb les plantes autòctones. En aquest sentit donem aquí notícia de l’aparició, establiment i distribució coneguda en el tram inferior del riu Segre de dues espècies noves de Lemnaceae per a les Terres de Ponent. Una d’elles, Lemna valdiviana, representa a més la primera citació per a Catalunya. De l’altra, Spirodela polyrrhiza, se’n posa en dubte el seu origen com planta autòctona. Totes les quadrícules UTM mencionades corresponen al fus 31T.
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Classifying Agricultural Terrain for Machinery Traversability Purposes

  • Yandun, Francisco J.
  • Gregorio López, Eduard
  • Zúñiga, Marcos
  • Escolà i Agustí, Alexandre
  • Rosell Polo, Joan Ramon
  • Auat Cheein, Fernando A.
The detection of the type of soil surface where a robotic vehicle is navigating on is an important issue for performing several agricultural tasks. Satisfactory results in activities such as seeding, plowing, fertilizing, among others depend on a correct identification of the vehicle environment, specially its contact interface with the ground. In the this work, the implementation of a supervised image texture classifier to recognize five different classes of typical agricultural soil surfaces is presented and analysed. The sensing device is the Microsoft Kinect for Windows V2, which allows to acquire RGB, IR and depth data. Only IR and depth data were used for the processing, since color information becomes unreliable under different illumination conditions. Two data acquisition modes allowed to validate and to apply the system in real operation conditions. The accuracy of the classifier was assessed under different configuration parameters, obtaining up to 93 percent of success rate, in ideal conditions. Real field conditions were simulated by placing the sensor over a moving wagon, obtaining up to 86 percent of success rate, showing in this way the usability of a low cost sensor such as the Kinect V2 for agricultural robotics.
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Modelo de atención a las personas con DID: una revisión desde la psicología positiva

  • Feliu, Begoña
  • Alsinet, Carles
  • Torrelles Nadal, Cristina
  • Blasco Belled, Ana
  • Jordana Berenguer, Norma
Pòster presentat a les III Jornadas de Psicología Positiva, organitzades per la Universitat de La Laguna i el Col·legi Oficial de Psicologia en col·laboració amb la Sociedad Española de Psicologia Positiva (SEPP), celebrades a Tenerife del 23 al 25 de març de 2017, Objetivo: Conocer la evolución de las personas con DID de la província de Lleida. Metodología: Cuestionario. Datos biográficos, datos médicos, datos psicológicos, datos sociales. Conclusiones: Modelo de atención centrado en las personas. Perfiles de atención. La organización de las entidades. Propuestas y perspectivas de futuro. Líneas de actuación: Modelo centrado en la persona. Acompañamiento lateral. Ocupabilidad, ocupación y trabajo. Figura del referente de la persona con DID. Dirección por valores
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Bienestar y satisfacción con la vida de las personas mayores

  • Jordana Berenguer, Norma
  • Alsinet, Carles
  • Torrelles Nadal, Cristina
  • Blasco Belled, Ana
  • Feliu, Begoña
Pòster presentat a les III Jornadas de Psicología Positiva, organitzades per la Universitat de La Laguna i el Col·legi Oficial de Psicologia en col·laboració amb la Sociedad Española de Psicologia Positiva (SEPP), celebrades a Tenerife del 23 al 25 de març de 2017, El objetivo es conocer y comparar el grado de satisfacción con la vida y el grado de bienestar subjetivo de las personas mayores de la ciudad de Lleida. El instrumento utilizado para analizar el bienestar subjetivo es la escala de un único ítem del Overall Life Satisfaction (OLS) (Cummins et al., 2003; Casas et al., 2013) y para analizar la satisfacción vital se ha utilizado la escala SWLS (Diener et al., 1985; Atienza et al., 2000) que está formada por 5 ítems que reflejan cómo pueden pensar o sentirse las personas respeto a su vida. La recogida de datos se ha realizado en formato online y en papel a través de una persona que facilitaba la realización de los cuestionarios.
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