1,093 research outputs found

    Determinación de zonas idóneas para el establecimiento de plantaciones vitivinícolas en la comuna de Hualañé.

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    63 p.La planificación territorial se enfrenta al principal problema de manejar una gran cantidad de información espacial, por lo que tiene que operar un conjunto de criterios, normas y planes que regulen al actividad con el fin de conseguir una adecuada relación entre el área, población, actividades, servicios e infraestructura. El presente estudio plantea una metodología basada en la integración de los Sistemas Información Geográfica (SIG) y las Técnicas de Evaluación Multicriterio (EMC) para obtener un Modelo de Capacidad de Acogida (MCA) que determine las zonas idóneas para el establecimiento de plantaciones vitivinícolas en la comuna de Hualañé, ubicada en la Región del Maule-Chile. Se construyó una base de datos digital vectorial que incluyó exposición de laderas, profundidad suelo, drenaje, pendientes, caminos, zonas urbanas, distancia a cursos de agua, entre otras. El MCA resultante muestra que un 0,45 % de superficie en categoría “muy alta”, 20,41 en categoría “alta”, 46,17 en categoría “media”, mientras que las categorías “baja”, “muy baja” y “excluyente” en conjunto suman un 32,97%. Los resultados fueron comparados con el catastro digital de viñas, quedando en evidencia el potencial de suelo para establecer plantaciones en las zonas de categorías muy alta, alta y media las que alcanzan un 67.36% de la superficie de la zona en estudio./ABSTRACT:Territorial land use planning is facing the main problem of handling a large amount of spatial information, whereby have to operate a set of criteria, standards and plans wich regulate the activity in order to achieve an appropriate relationship between area, population, activities , services and infrastructure. This study shows a methodology based on the integration of Geographic Information Systems (GIS) and Multicriteria Evaluation Techniques (EMC) in order to get the Model Capacity welcome MCA wich determinted suitable areas for plantation establishment vineyards in Hualañé commune, located in the Maule Region, Chile. Was made a digital vector data base wich included among other, land exposure, soil depth, drainage, slope, roads, urban areas, distance to water courses. The resulting MCA shows 0.45% of the area in “very high” category, 20.41% in “high” category, 46.17% in “medium category, while the categories “low”, “very low” and “exclusive” together add up to 32,97%. The results were compared with the digital register of Chilean vineyards. It is clear the potential of the land to establish vineyards in the very high, high and medium categories areas, wich all together reach a 67.36% of the area under study

    A Graph Theory approach to assess nature’s contribution to people at a global scale

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    The use of Graph Theory on social media data is a promising approach to identify emergent properties of the complex physical and cognitive interactions that occur between humans and nature. To test the effectivity of this approach at global scales, Instagram posts from fourteen natural areas were selected to analyse the emergent discourse around these areas. The fourteen areas, known to provide key recreational, educational and heritage values, were investigated with different centrality metrics to test the ability of Graph Theory to identify variability in ecosystem social perceptions and use. Instagram data (i.e., hashtags associated to photos) was analysed with network centrality measures to characterise properties of the connections between words posted by social media users. With this approach, the emergent properties of networks of hashtags were explored to characterise visitors’ preferences (e.g., cultural heritage or nature appreciation), activities (e.g., diving or hiking), preferred habitats and species (e.g., forest, beach, penguins), and feelings (e.g., happiness or place identity). Network analysis on Instagram hashtags allowed delineating the users’ discourse around a natural area, which provides crucial information for effective management of popular natural spaces for peopleThis work is a product of ECOMAR research network (Evaluation and monitoring of marine ecosystem services in Iberoamerica; project number 417RT0528, funded by CYTED). Three co-authors were funded by H2020-Marie Skłodowska-Curie Action during the conduction of this work: SdJ, funded by MSCA-IF-2016 (ref. 743545); AOA, funded by MSCA-IF-2016 (ref. 746361); ARF, funded by MSCA-IF-2014 (ref. 655475)S

    Using graph theory and social media data to assess cultural ecosystem services in coastal areas: Method development and application

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    The use of social media (SM) data has emerged as a promising tool for the assessment of cultural ecosystem services (CES). Most studies have focused on the use of single SM platforms and on the analysis of photo content to assess the demand for CES. Here, we introduce a novel methodology for the assessment of CES using SM data through the application of graph theory network analyses (GTNA) on hashtags associated to SM posts and compare it to photo content analysis. We applied the proposed methodology on two SM platforms, Instagram and Twitter, on three worldwide known case study areas, namely Great Barrier Reef, Galapagos Islands and Easter Island. Our results indicate that the analysis of hashtags through graph theory offers similar capabilities to photo content analysis in the assessment of CES provision and the identification of CES providers. More importantly, GTNA provides greater capabilities at identifying relational values and eudaimonic aspects associated to nature, elusive aspects for photo content analysis. In addition, GTNA contributes to the reduction of the interpreter's bias associated to photo content analyses, since GTNA is based on the tags provided by the users themselves. The study also highlights the importance of considering data from different social media platforms, as the type of users and the information offered by these platforms can show different CES attributes. The ease of application and short computing processing times involved in the application of GTNA makes it a cost-effective method with the potential of being applied to large geographical scales.Comment: 23 pages, 5 figures, 2 appendice

    Using graph theory and social media data to assess cultural ecosystem services in coastal areas: Method development and application

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    The use of social media (SM) data has emerged as a promising tool for the assessment of cultural ecosystem services (CES). Most studies have focused on the use of single SM platforms and on the analysis of photo content to assess the demand for CES. Here, we introduce a novel methodology for the assessment of CES using SM data through the application of graph theory network analyses (GTNA) on hashtags associated to SM posts and compare it to photo content analysis. We applied the proposed methodology on two SM platforms, Instagram and Twitter, on three worldwide known case study areas, namely Great Barrier Reef, Galapagos Islands and Easter Island. Our results indicate that the analysis of hashtags through graph theory offers similar capabilities to photo content analysis in the assessment of CES provision and the identification of CES providers. More importantly, GTNA provides greater capabilities at identifying relational values and eudaimonic aspects associated to nature, elusive aspects for photo content analysis. In addition, GTNA contributes to the reduction of the interpreter’s bias associated to photo content analyses, since GTNA is based on the tags provided by the users themselves. The study also highlights the importance of considering data from different SM platforms, as the type of users and the information offered by these platforms can show different CES attributes. The ease of application and relative short computing processing times involved in the application of GTNA makes it a cost-effective method with the potential of being applied to large geographical scalesThis work is a result of the ECOMAR Network, “Evaluation and monitoring of marine ecosystem services in Iberoamérica” (project number 417RT0528) funded by the CYTED program. During the time of the study and writing period ARF was supported by a H2020-Marie Skłodowska-Curie Action MSCA-IF-2014 (ref. 655475); AOA was supported by a H2020-Marie Skłodowska-Curie Action MSCA-IF-2016 (ref. 746361); SdJ was supported by a H2020-Marie Skłodowska-Curie Action MSCA-IF-2016 (ref. 743545); PP was funded by the Xunta de Galicia (RECREGES II Project, Grant ED481B2018/ 017)S

    Casuística del abdomen agudo y su indicación quirúrgica en un servicio de cirugía. Novedades diagnósticas

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    Ante la frecuencia del abdomen agudo en la práctica diaria de los equipos de Cirugía de guardia del Servicio de Cirugía General y Digestiva del Hospital de Son Dureta, que representa el 56 % de todas las urgencias que atienden, se revisa la casuística de este amplio concepto diagnóstico comparándola con la de otros autores en especial referencia al llamado abdomen agudo inespecífico que ocupa la mitad de los abdómenes agudos atendidos, señalando las nuevas técnicas diagnósticas como la laparoscopia, la ecografia de alta resolución y los programas informáticos de diagnóstico, con sus limitaciones, subrayando la persistencia de la anamnesis, la exploración física y las exploraciones complementarias como la base de la primera orientación diagnóstica de todo abdomen agudo en vistas a obtener un diagnóstico precoz y una correcta indicación quirúrgica

    Preventive treatments for breast cancer: recent developments

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    Breast cancer is a burden for western societies, and an increasing one in emerging economies, because of its high incidence and enormous psychological, social, sanitary and economic costs. However, breast cancer is a preventable disease in a significant proportion. Recent developments in the armamentarium of effective drugs for breast cancer prevention (namely exemestane and anastrozole), the new recommendation from the National Institute for Health and Care Excellence to use preventative drugs in women at high risk as well as updated Guidelines from the US Preventive Services Task Force and the American Society of Clinical Oncology should give renewed momentum to the pharmacological prevention of breast cancer. In this article we review recent major developments in the field and examine their ongoing repercussion for breast cancer prevention. As a practical example, the potential impact of preventive measures in Spain is evaluated and a course of practical actions is delineated

    Citizen science in data and resource-limited areas: A tool to detect long-term ecosystem changes

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    Coral reefs are threatened by numerous global and local stressors. In the face of predicted large-scale coral degradation over the coming decades, the importance of long-term monitoring of stress-induced ecosystem changes has been widely recognised. In areas where sustained funding is unavailable, citizen science monitoring has the potential to be a powerful alternative to conventional monitoring programmes. In this study we used data collected by volunteers in Southeast Sulawesi (Indonesia), to demonstrate the potential of marine citizen science programmes to provide scientifically sound information necessary for detecting ecosystem changes in areas where no alternative data are available. Data were collected annually between 2002 and 2012 and consisted of percent benthic biotic and abiotic cover and fish counts. Analyses revealed long-term coral reef ecosystem change. We observed a continuous decline of hard coral, which in turn had a significant effect on the associated fishes, at community, family and species levels. We provide evidence of the importance of marine citizen science programmes in detecting long-term ecosystem change as an effective way of delivering conservation data to local government and national agencies. This is particularly true for areas where funding for monitoring is unavailable, resulting in an absence of ecological data. For citizen science data to contribute to ecological monitoring and local decision-making, the data collection protocols need to adhere to sound scientific standards, and protocols for data evaluation need to be available to local stakeholders. Here, we describe the monitoring design, data treatment and statistical analyses to be used as potential guidelines in future marine citizen science projects

    Creating space, aligning motivations, and building trust: a practical framework for stakeholder engagement based on experience in 12 ecosystem services case studies

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    Ecosystem services inherently involve people, whose values help define the benefits of nature's services. It is thus important for researchers to involve stakeholders in ecosystem services research. However, a simple and practicable framework to guide such engagement, and in particular to help researchers anticipate and consider key issues and challenges, has not been well explored. Here, we use experience from the 12 case studies in the European Operational Potential of Ecosystem Research Applications (OPERAs) project to propose a stakeholder engagement framework comprising three key elements: creating space, aligning motivations, and building trust. We argue that involving stakeholders in research demands thoughtful reflection from the researchers about what kind of space they want to create, including if and how they want to bring different interests together, how much space they want to allow for critical discussion, and whether there is a role for particular stakeholders to serve as conduits between others. In addition, understanding their own motivations—including values, knowledge, goals, and desired benefits—will help researchers decide when and how to involve stakeholders, identify areas of common ground and potential disagreement, frame the project appropriately, set expectations, and ensure each party is able to see benefits of engaging with each other. Finally, building relationships with stakeholders can be difficult but considering the roles of existing relationships, time, approach, reputation, and belonging can help build mutual trust. Although the three key elements and the paths between them can play out differently depending on the particular research project, we suggest that a research design that considers how to create the space in which researchers and stakeholders will meet, align motivations between researchers and stakeholders, and build mutual trust will help foster productive researcher–stakeholder relationships

    Subjective well-being indicators for large-scale assessment of cultural ecosystem services

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    The substantial importance of cultural benefits as a source of human well-being is increasingly recognised in society-environment interactions. The integration of cultural ecosystem services (CES) into the ecosystem services framework remains a challenge due to the difficulties associated with defining, articulating and measuring CES. We operationalise a novel framework developed by the UK National Ecosystem Assessment that identifies CES as the interactions between environmental spaces (i.e. physical localities or landscapes), and the activities that occur there. We evaluate the benefits of the CES provided by 151 UK marine sites to recreational sea anglers and divers, using subjective well-being indicators. Factor analysis of an online questionnaire with 1220 participants revealed multiple CES benefits that contribute to human wellbeing e.g. including ‘engagement with nature’, ‘place identity’ and ‘therapeutic value’. In addition to regional differences, we also found that biophysical attributes of sites, such as the presence of charismatic species and species diversity, were positively associated with provision of CES benefits. The study provides evidence that could be used to inform designation of protected areas. The indicators used in the study may also be adapted for use across a range of marine and terrestrial spaces for improved integration of CES in environmental decisionmaking
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