56,687 research outputs found

    Revalorizando el bosque seco de algarrobo : estudio y an谩lisis de la biodiversidad, distribuci贸n y conservaci贸n de los bosques secos en Lambayeque

    No full text
    En nuestro planeta, gran parte del 谩rea continental ha estado cubierta de bosques por millones de a帽os. En el Per煤, tanto la costa, la sierra como la selva poseen grandes bosques, que en conjunto ocupan el 51% del territorio. Los bosques secos son ecosistemas caracter铆sticos de la costa norte peruana, siendo su especie clave el algarrobo (Prosopis pallida), la cual que no solo representa un valor ecol贸gico sino tambi茅n econ贸mico para las comunidades aleda帽as a dichos ecosistemas. Esta investigaci贸n se centra en los bosques de Lambayeque, siendo definidos como representaciones de bosques secos de algarrobo los que se ubican en el Santuario Hist贸rico Bosque de P贸mac, el ACP Chaparr铆 y el ACR Huacrupe La Calera. Actualmente, es evidente que los procesos de deforestaci贸n son las causas m谩s fuertes de la reducci贸n de muchas especies forestales. Esto en conjunto con los bruscos cambios de uso de suelo, los incendios forestales de origen antr贸pico y el cambio clim谩tico vienen afectando a las comunidades humanas y muchas poblaciones de especies animales y vegetales. Una de las especies que se ve amenazada por estos factores es, precisamente, el algarrobo, por lo que su conservaci贸n junto al ecosistema de bosque seco en su plenitud es prioritaria. Por tanto, el objetivo de esta tesis es identificar y plantear qu茅 estrategias son las m谩s adecuadas para conservar y gestionar los bosques secos de manera integrada, de manera que se valoricen los recursos y servicios que ofrecen estos ecosistemas. Se trabaj贸 una metodolog铆a basada en biogeograf铆a de la conservaci贸n, la cual incluy贸 m茅todos de modelamiento de distribuci贸n de especies (MDE), sensores remotos y sistemas de informaci贸n geogr谩fica (SIG). Se utiliz贸 el software Maxent, un programa de modelamiento basado en el principio de m谩xima entrop铆a, para obtener la distribuci贸n potencial presente del algarrobo, as铆 como la distribuci贸n potencial futura (para el a帽o 2050) bajo dos escenarios RCP 2,6 y 8,5, resultando en un inesperado aumento en la potencialidad del norte peruano para albergar la especie. Para conocer la din谩mica de los bosques secos en cuanto a cambios en cobertura vegetal, frecuencia de incendios y fragmentaci贸n del paisaje se utilizaron herramientas SIG y de teledetecci贸n (como el NDVI) para realizar un an谩lisis espacial y multitemporal, dando como resultado variaciones en la cobertura vegetal, pero que tienden a la reducci贸n de la vegetaci贸n hacia los 煤ltimos a帽os. Adem谩s, se evidencia una ampliaci贸n de la frontera agr铆cola debido principalmente a la deforestaci贸n. Por otra parte, no se puede omitir el rol de los eventos del ENSO en una zona como esta, pues sus efectos influyen en la regeneraci贸n de sus bosques. El trabajo de campo consisti贸 en dos partes esenciales: en primer lugar, obtener el 铆ndice de valor de importancia (IVI) del algarrobo en el bosque seco. El m茅todo de muestreo realizado fue el punto 鈥 centro 鈥 cuadrado, obteniendo un valor de 53,01 para el algarrobo, adem谩s de conocer la composici贸n flor铆stica del bosque, tomando como referencia principal el ACR Huacrupe. En segundo lugar, se aplicaron encuestas y entrevistas a actores clave, guardaparques y a la poblaci贸n local, quienes confirmaron la importancia de la especie para el mantenimiento de los bosques secos y como aporte y hasta sustento econ贸mico de diversas comunidades, as铆 como la preocupante situaci贸n de la deforestaci贸n, principalmente ilegal para fines comerciales, degradaci贸n y continua reducci贸n de los 谩rboles de algarrobo.On our planet, much of the continental area has been forested for millions of years. In Peru, the coast, highlands and jungle, have large forests, which together occupy 51% of the territory. Dry forests are characteristic ecosystems of the northern coast of Peru, and its key species Prosopis pallida, which represents not only an ecological but also economic value to communities surrounding these ecosystems. This research focuses on the forests of Lambayeque, being defined as representations of dry forests of carob tree those located in the Pomac Forest Historical Sanctuary, the ACP Chaparr铆 and ACR Huacrupe La Calera. Currently, it is clear that deforestation is the strongest cause of the reduction of many forest species. This coupled with the rapid changes in land use, forest fires and climate change are affecting many human communities and populations of animals and plants. One species that is threatened by these factors is, precisely, carob tree, so conservation along the dry forest ecosystem in its fullness is a priority. Therefore, the objective of this thesis is to identify and propose what strategies are most appropriate to conserve and manage the dry forests in an integrated manner so that resources and services offered by these ecosystems could be valorized. A methodology based on conservation biogeography, which included methods of species distribution modeling (MDE), remote sensing and geographic information systems (GIS), was worked. The Maxent software, a modeling program based on the principle of maximum entropy, for the present potential of the carob tree distribution, and its potential future distribution (2050) under two scenarios RCP 2,6 and 8,5 was used, resulting in an unexpected increase in the potential of northern Peru to host the species. To understand the dynamics of dry forests in terms of changes in land cover, fire frequency and landscape fragmentation, GIS tools and remote sensing methods (such as NDVI) were used to perform a spatial and multi-temporal analysis, resulting in variations in coverage plant, but they tend to reduce the vegetation to recent years. Furthermore, there is a clear expansion of the agricultural frontier, mainly due to deforestation. Moreover, one cannot ignore the role of ENSO events in an area like this, since their effects influence the regeneration of forests. The field work consisted of two main parts. In first place, to obtain the importance value index (IVI) of the carob tree dry forest. The sampling method was the point 鈥 centered 鈥 quarter, obtaining a value of 53,01 for the carob tree, besides knowing the floristic composition of the forest, taking as main reference the ACR Huacrupe. In second place and finally, surveys and interviews with key players, park rangers and local people applied who confirmed the importance of the species to the maintenance of dry forests and as a contribution and economic support to various communities as well as the worrying situation of deforestation, illegal primarily for commercial purposes, habitat fragmentation, degradation and continuous reduction of carob trees.Tesi

    Relationship between personality and academic motivation in education degrees students

    Get PDF
    p. 327-341The present study aims to understand the relationship between the big five factors of personality and academic motivation. In addition, the following variables are taken into consideration; sex, age and type of educational studies. A quantitative methodology is used, in base to a not experimental, correlational study. The sample is composed of 514 students of the Faculty of Education of Leon鈥檚 University, between the three education degrees. To gather the information, participants were asked to complete the Learning and Motivation Strategies Questionnaire (CEAM) and the Personality Questionnaire Five Factor Inventory (NEO-FFI). The results show the significant relationship between personality facets and motivation variables. It should be noted that female results were higher in the values of intrinsic motivation, motivation towards teamwork, neuroticism, and kindness, and the male results were higher in self-efficacy. Additionally, it was observed that intrinsic motivation decreases progressively from the first to the fourth year of the degree, the need for recognition decreases in the two last study years, and the openness to experiences is higher in the last year of the degree. Finally, Social Education students are those that show a higher intrinsic motivation, self-efficacy, total motivation, openness to experiences, and neuroticism, while Primary Education students鈥 results were higher in the need for recognition.S

    Biolog铆a y Ciencias Ambientales frente al reto de la transici贸n energ茅tica

    Get PDF
    En el contexto de la 鈥渢ransici贸n ecol贸gica justa鈥 tanto a nivel espa帽ol como europeo y mundial, se persigue frenar la crisis de abastecimiento de energ铆a, y no comprometer la conservaci贸n del Patrimonio Natural, ya que esto empeorar铆a la actual crisis de biodiversidad que, sabemos, vertebra nuestra salubridad. Pero, 驴estamos preparados para asumir el cambio energ茅tico y la crisis de la biodiversidad de una manera coherente y coordinada? El objetivo de este art铆culo es realizar una peque帽a revisi贸n de la situaci贸n actual, desde la perspectiva de la conservaci贸n y evaluar las mejoras necesarias que debemos exigir como ciudadanos, analizando el papel del conocimiento cient铆fico y poniendo en valor nuestras capacidades que como bi贸logos y ambient贸logos como ciudadanos y ciudadanas con conocimientos sobre temas, que afectan a los seres vivos y a su relaci贸n con la parte f铆sica del planeta

    South Yorkshire low carbon energy supply chains: insulation sector summary

    Get PDF

    Meta-Critical Climate Change Fiction: Claire Vaye Watkins' Gold Fame Citrus

    No full text

    Metodolog铆a de intervenci贸n para trabajar ODS. Educaci贸n a trav茅s de las artes

    Get PDF
    La Agenda 2030 presenta 17 Objetivos de Desarrollo Sostenible (ODS), con sus metas e indicadores universales que los pa铆ses miembros de la ONU emplean para enmarcar sus pol铆ticas. Entre las metas del ODS 4 鈥渆ducaci贸n de calidad鈥 encontramos: 鈥渁segurar que todos los alumnos adquieran los conocimientos te贸ricos y pr谩cticos necesarios para promover el desarrollo sostenible, entre otras cosas mediante la educaci贸n para el desarrollo sostenible y los estilos de vida sostenibles, los derechos humanos, la igualdad de g茅nero, la promoci贸n de una cultura de paz y no violencia, la ciudadan铆a mundial y la valoraci贸n de la diversidad cultural y la contribuci贸n de la cultura al desarrollo sostenible鈥. La educaci贸n, se considera el motor de la Agenda 2030 porque, adem谩s de representar el centro del ODS 4, desempe帽a tambi茅n un papel notable en la implementaci贸n de los dem谩s, mejorando su alcance y efectividad. As铆 pues, entre las disciplinas que sustentan este trabajo se escogi贸 la Educaci贸n para el Desarrollo Sostenible y la Ciudadan铆a Global como marco de acci贸n y punto de partida en la formaci贸n de los ciudadanos de un futuro viable, equitativo y habitable. Se continu贸 investigando las oportunidades del desarrollo de la Competencia Intercultural en las relaciones humanas, aquello que diferencia a unas personas de otras puede aportar al conjunto de la sociedad y c贸mo la educaci贸n permitir铆a su aprovechamiento. Con todo ello, se plante贸 el marco did谩ctico de interacci贸n en el cual se implement贸 la interculturalidad en el ejercicio educativo. Se estudi贸 as铆 el poder de las artes como medio de motivaci贸n e inspiraci贸n a la hora de transmitir de la manera m谩s eficaz posible los valores considerados m谩s arriba. El objetivo del presente estudio se centra en demostrar el potencial de las artes para fomentar las competencias comunicativas, sociales, interculturales, emocionales, de ciudadan铆a y sostenibilidad. Para ello, se ha realizado una investigaci贸n aplicada que deriva en una propuesta concreta de intervenci贸n con un programa educativo destinado a la ense帽anza de lenguas, tanto primera como extranjera, en distintos niveles de la educaci贸n formal en Mali y en Espa帽a, aplicando un m茅todo hol铆stico basado en el paradigma interpretativo. A trav茅s de la pintura, la literatura y el cine, se plantean una serie de actividades ideadas para crear un entorno educativo integrador, favorecer el empoderamiento del alumnado y promover el pensamiento cr铆tico, la empat铆a, la resiliencia, la comunicaci贸n, la cooperaci贸n y la educaci贸n intercultural, como competencias esenciales para la consecuci贸n de los 17 ODS, la construcci贸n de un mundo transcultural sostenible y el desarrollo de una ciudadan铆a global preparada para los retos del siglo XXI. En la metodolog铆a de este proceso educativo innovador, multidisciplinar, flexible y adaptable, se ha empleado un an谩lisis del proceso de investigaci贸n para monitorizarlo adecuadamente (DAFO). Cada una de las propuestas presenta una recogida de datos cualitativos (observaci贸n, r煤bricas) y cuantitativos (encuestas, entrevistas) y se ofrece un an谩lisis de contraste de los resultados finales. Con todo, se espera facilitar la exigente tarea que supone hacer consciente a la sociedad de base (desde la misma infancia; desde los niveles m谩s bajos de la misma y en todos los niveles de la educaci贸n formal) de en qu茅 consisten los ODS y su relevancia para hacer de todas las personas corresponsables directas en su consecuci贸n para garantizar un futuro sostenible para toda la ciudadan铆a global.The 2030 Agenda presents 17 Sustainable Development Goals (SDGs), with their universal targets and indicators that UN member countries use to frame their policies. Among the targets of SDG 4 鈥渜uality education,鈥 we find the one that seeks: 鈥渢o ensure that all students acquire the theoretical and practical knowledge necessary to promote sustainable development, among other things through education for sustainable development and sustainable lifestyles, human rights, gender equality, the promotion of a culture of peace and non-violence, world citizenship and the appreciation of cultural diversity and the contribution of culture to sustainable development鈥. Education is considered the engine of the 2030 Agenda because, in addition to representing the centre of SDG 4, it also plays a notable role in the implementation of the others, improving their scope and effectiveness. Among the disciplines that support this research, Education for Sustainable Development and Global Citizenship sets the framework for action and represents a starting point in the formation of citizens for a viable, equitable and habitable future. Global citizenship implies human relations and those and intrinsically shaped by culture. Intercultural Education and, more specifically, the development of Intercultural Competence needed to be considered. What differentiates some people from others can contribute to society as a whole and education is the means to explore and understand. For the design of a didactic framework of interaction, the power of the arts was studied as a means of motivation and inspiration when transmitting the values considered above in the most effective way possible. The objective of this study focuses on proving the potential of the arts to promote communicative, social, intercultural, emotional, citizenship and sustainability skills. For this, the theoretical research derived in a concrete intervention proposal with an educational program in language teaching, both first and foreign languages, at different levels of formal education in Mali and Spain, applying a holistic method based on the interpretive paradigm. Through painting, literature and cinema, a series of activities were designed to create an inclusive educational environment, favour the empowerment of students and promote critical thinking, empathy, resilience, communication, cooperation and intercultural education, as essential skills for the achievement of the 17 SDGs, the construction of a sustainable transcultural world and the development of global citizenship prepared for the challenges of the 21st century. In the methodology of this innovative, multidisciplinary, flexible and adaptable educational process, an analysis of the research process has been used to adequately monitor it (SWOT). Each of the proposals presents a collection of qualitative data (observation, rubrics) and quantitative data (surveys, interviews) and contrast analysis of the final results is offered. All in all, it is expected to facilitate the demanding task of making basic society aware (from childhood itself, from its lowest levels and at all levels of formal education) of what the SDGs consist of and their relevance to make all people directly co-responsible in its achievement to guarantee a sustainable future for all global citizens

    Making School Streets Healthier: Learning from temporary and emergency closures

    Get PDF
    The Healthy Streets Everyday (HSE) programme began in 2019 to promote active, safe, and sustainable travel in London. In line with the Mayor鈥檚 Transport Strategy, this programme emphasises the Healthy Streets approach, which recognises that promoting health on London鈥檚 streets requires supporting the diverse ways streets are used, including active travel, by making them safer and more accessible to all. School Streets 鈥 the temporary closure of streets in front of schools to motor vehicle traffic at the beginning and end of the school day 鈥 have recently emerged as a key intervention in this approach. The connection between streets and broader public health is perhaps nowhere starker than at the school gates. With over 20% of peak- time traffic associated with the school run, traffic and congestion are concentrated at the cramped residential streets that often serve London鈥檚 schools. This puts children at greater risk from road danger and poor air quality. These challenging conditions have been exacerbated by Covid-19; specifically, the need for physical distancing and concern about the effects of a car-based recovery. In response, there has been significant growth in School Streets since the beginning of 2020, with more than 400 currently in place across London. The HSE programme played an important part in providing support to 16 of London鈥檚 boroughs as they implemented their School Streets programmes, often for the first time. As a crucial part of Transport for London鈥檚 Covid-19 Streetspace scheme many of these recent School Streets have been implemented as temporary or emergency interventions, employing light-touch and low-cost approaches such as mobile traffic camera enforcement or temporary barriers. This report sets out several key findings from the close observation of two School Streets: 1. Significant reductions in motor vehicle traffic both during the closure time and over the whole day. 2. Minimal change in pedestrian numbers and use of space, with some evidence of increased cycling. 3. Improvements in several Healthy Streets indicators. Following from these findings and considering more comprehensive academic research, this report also outlines four recommendations for designers and policymakers to consider when making School Streets more permanent or implementing new schemes: 1.Taking a whole school and whole route approach 2.Reducing traffic effectively through enforcement and exemptions 3.Completing a scheme by changing the public realm 4.Designing for and responding to scheme issues through in-depth monitoring and evaluatio

    Rainfall Prediction: A Comparative Analysis of Modern Machine Learning Algorithms for Time-Series Forecasting

    Get PDF
    Rainfall forecasting has gained utmost research relevance in recent times due to its complexities and persistent applications such as flood forecasting and monitoring of pollutant concentration levels, among others. Existing models use complex statistical models that are often too costly, both computationally and budgetary, or are not applied to downstream applications. Therefore, approaches that use Machine Learning algorithms in conjunction with time-series data are being explored as an alternative to overcome these drawbacks. To this end, this study presents a comparative analysis using simplified rainfall estimation models based on conventional Machine Learning algorithms and Deep Learning architectures that are efficient for these downstream applications. Models based on LSTM, Stacked-LSTM, Bidirectional-LSTM Networks, XGBoost, and an ensemble of Gradient Boosting Regressor, Linear Support Vector Regression, and an Extra-trees Regressor were compared in the task of forecasting hourly rainfall volumes using time-series data. Climate data from 2000 to 2020 from five major cities in the United Kingdom were used. The evaluation metrics of Loss, Root Mean Squared Error, Mean Absolute Error, and Root Mean Squared Logarithmic Error were used to evaluate the models' performance. Results show that a Bidirectional-LSTM Network can be used as a rainfall forecast model with comparable performance to Stacked-LSTM Networks. Among all the models tested, the Stacked-LSTM Network with two hidden layers and the Bidirectional-LSTM Network performed best. This suggests that models based on LSTM-Networks with fewer hidden layers perform better for this approach; denoting its ability to be applied as an approach for budget-wise rainfall forecast applications

    The influence of blockchains and internet of things on global value chain

    Get PDF
    Despite the increasing proliferation of deploying the Internet of Things (IoT) in global value chain (GVC), several challenges might lead to a lack of trust among value chain partners, e.g., technical challenges (i.e., confidentiality, authenticity, and privacy); and security challenges (i.e., counterfeiting, physical tempering, and data theft). In this study, we argue that Blockchain technology, when combined with the IoT ecosystem, will strengthen GVC and enhance value creation and capture among value chain partners. Thus, we examine the impact of Blockchain technology when combined with the IoT ecosystem and how it can be utilized to enhance value creation and capture among value chain partners. We collected data through an online survey, and 265 UK Agri-food retailers completed the survey. Our data were analyzed using structural equation modelling (SEM). Our finding reveals that Blockchain technology enhances GVC by improving IoT scalability, security, and traceability when combined with the IoT ecosystem. Which, in turn, strengthens GVC and creates more value for value chain partners 鈥 which serves as a competitive advantage. Finally, our research outlines the theoretical and practical contribution of combining Blockchain technology and the IoT ecosystem

    Conservation agriculture affects grain and nutrient yields of Maize (Zea Mays L.) and can impact food and nutrition security in Sub-Saharan Africa

    Get PDF
    Maize is a major staple and plays an essential role in food and nutrition security in Sub-Saharan Africa (SSA). Conservation agriculture (CA), a climate-smart agriculture practise based on minimum soil disturbance, crop residue retention, and crop diversification, has been widely advocated but without extensive research on the impact it may have on maize nutrient composition, and food and nutrition security. This study assessed the grain yield, macro- and micronutrient mineral content, and nutrient yield of eight maize varieties grown in Malawi, and how these are affected by CA practises over two seasons. The minerals were analysed by inductively coupled plasma (ICP) coupled to optical emission spectroscopy (OES) and to mass spectroscopy (MS). Grain yield and Se content differed among the varieties, while C, N, Fe, K, Mg, Mn, P, and Zn were similar. The local variety Kanjerenjere showed lowest grain and nutrient yields. The open-pollinated varieties (OPVs) concentrated more minerals than the F1 hybrids, but the latter showed higher yields for both grain and nutrients. Typical consumption of the eight maize varieties could fully meet the protein and Mg dietary reference intake (DRIs) of Malawian children (1鈥3 years), as well as Mg and Mn needs of adult women (19鈥50 years), but their contribution to dietary requirements was low for Fe (39鈥41%) and K (13鈥21%). The trials showed that CA increased grain yield (1.2- to 1.8-fold) and Se content (1.1- to 1.7-fold), but that it had no effect on C, K, Mg, P, and Zn, and that N (1.1- to 1.2-fold), Mn (1.1- to 1.8-fold), and Fe (1.3- to 3.4-fold) were reduced. The high increase in grain yield under CA treatments resulted in increased yields of protein and Se, no effect on the yields of K, Mg, Mn, P, Zn, and reduced Fe yield. Conservation agriculture could contribute in reducing the risk of Se deficiency in Malawian women and children but exacerbates the risk of Fe deficiency. A combination of strategies will be needed to mitigate some of the foreseen effects of climate change on agriculture, and food and nutrition security, and improve nutrient intake
    corecore