138 research outputs found

    Sistema de informação geográfica das zonas balneares da ilha do Pico (Açores)

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    XII Expedição Científica do Departamento de Biologia - Pico 2005.Os trabalhos promovidos pela Secção de Geografia, no decorrer da “Expedição Cientifica – Pico 2005”, incidiram na recolha e sistematização de dados para a implementação de um Sistema de Informação Geográfica (SIG) das Zonas Balneares (ZB) da ilha do Pico. O estudo enquadra-se numa linha de investigação em curso que visa a gestão integrada da orla costeira dos Açores. Os levantamentos de campo foram realizados por uma equipa composta por nove elementos com formações multidisciplinares. Os dados coligidos, concluídos que estão os procedimentos de integração em ambiente SIG, não se destinam apenas à comunidade científica, mas sobretudo aos agentes e instituições com competências na promoção do turismo, conservação da natureza e gestão da orla costeira, incluindo os diferentes níveis de administração (local e regional). A metodologia de recolha de informação baseia-se na adaptação da proposta desenvolvida por Rita Norberto (Zonas Balneares Costeiras da Ilha de São Miguel. Contributos para o seu conhecimento, 2004). Os resultados obtidos permitem, desde logo, constatar o enorme potencial lúdico e conservacionista da costa do Pico, atendendo à quantidade ediversidade das zonas balneares inventariadas (44) e à presença de elementos naturais singulares. Por sua vez, o SIG revelou-se uma ferramenta de análise espacial extremamente eficaz na visualização dos elementos registados na base de dados geográfica

    Intelligent Fusion of Structural and Citation-Based Evidence for Text Classification

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    This paper investigates how citation-based information and structural content (e.g., title, abstract) can be combined to improve classification of text documents into predefined categories. We evaluate different measures of similarity, five derived from the citation structure of the collection, and three measures derived from the structural content, and determine how they can be fused to improve classification effectiveness. To discover the best fusion framework, we apply Genetic Programming (GP) techniques. Our empirical experiments using documents from the ACM digital library and the ACM classification scheme show that we can discover similarity functions that work better than any evidence in isolation and whose combined performance through a simple majority voting is comparable to that of Support Vector Machine classifiers

    Sistema de Informação Geográfica da orla costeira da Ilha Graciosa

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    XI Expedição Científica do Departamento de Biologia - Graciosa 2004.Na continuidade da linha de investigação em curso que visa a gestão integrada das zonas costeiras dos Açores, a Secção de Geografia do Departamento de Biologia da Universidade dos Açores deslocou uma equipa pluridisciplinar, composta por 9 elementos, para participar na “Expedição Científica Graciosa 2004”, evento que decorreu entre 07 e 15 de Junho. O objectivo central consistiu na recolha, registo e validação de dados georeferenciados, passíveis de integração num Sistema de Informação Geográfica desenhado especificamente para o efeito. A área de estudo corresponde à orla costeira da Graciosa, definida pela linha dos 500 m de distância contados para o interior da ilha a partir da linha de costa. Os critérios de delimitação decorrem da correspondência aproximada com a área de intervenção dos Planos de Ordenamento da Orla Costeira. Nos termos propostos, o Sistema de Informação Geográfica da Orla Costeira da Graciosa poderá constituir uma ferramenta de apoio à elaboração deste instrumento de planeamento territorial, assim como responder às orientações da União Europeia relativas à Gestão Integrada das Zonas Costeiras, respectivamente

    Valuation of Ecosystem Services to promote sustainable aquaculture practices

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    Conceptual frameworks to assess and valuate Ecosystem Services (ES) are rapidly becoming important tools for ecosystem‐based management, as they support transdisciplinary approaches to ecological economics and expand current asset boundaries to include natural and social capital. An important area where such ES assessment frameworks could become relevant management tools is aquaculture. Aquaculture activities are an interconnected part of the ecosystem in which they exist and, under certain circumstances, can support many of the same fundamental ES provided by nature. But, in most cases, aquaculture typically increases provisioning services at the expense of the other services (regulation & maintenance and cultural services). To understand the capacity of ES valuation methods to expose existing ES trade‐offs in areas under aquaculture development, this study provides a literature review of publications that assessed and valuated ES delivered and/or impacted by aquaculture. In general, it seems that certain types of aquaculture do negatively impact overall ES delivery (e.g. intensive mangrove shrimp farming in Asia), yet certain modes of production (e.g. integrated multi‐trophic aquaculture) and cultured species (e.g. algae and certain bivalves) can have a positive impact on ES, not only improving provisioning services but also regulation and maintenance services and, potentially, cultural services. ES valuation methods provide important data that facilitate discussion among stakeholders and policymakers and should be included in marine and coastal management planning processes to foster a more sustainable aquacultureThanks are due to the Portuguese Foundation for Science and Technology (FCT) for the financial support of this study through a PhD grant to M. Custódio (PD/BD/127990/2016) and CESAM (UID/AMB/50017/2013), and the co‐funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020. This work was also supported by the Integrated Program of SR&TD “Smart Valorization of Endogenous Marine Biological Resources Under a Changing Climate” (reference Centro‐01‐0145‐FEDER‐000018), co‐funded by Centro 2020 program, Portugal 2020 and European Union, through the European Regional Development Fund, by the European COST Action “Ocean Governance for Sustainability – challenges, options and the role of science” and by the ICES Science Fund Project “Social Transformations of Marine Social‐Ecological Systems”S

    LED Lighting and High-Density Planting Enhance the Cost-Efficiency of Halimione Portulacoides Extraction Units for Integrated Aquaculture

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    Halophytes are salt-tolerant plants that can be used to extract dissolved inorganic nutrients from saline aquaculture effluents under a production framework commonly known as Integrated Multi-Trophic Aquaculture (IMTA). Halimione portulacoides (L.) Aellen (common name: sea purslane) is an edible saltmarsh halophyte traditionally consumed by humans living near coastal wetlands and is considered a promising extractive species for IMTA. To better understand its potential for IMTA applications, the present study investigates how artificial lighting and plant density affect its productivity and capacity to extract nitrogen and phosphorous in hydroponic conditions that mimic aquaculture effluents. Plant growth was unaffected by the type of artificial lighting employed—white fluorescent lights vs. blue-white LEDs—but LED systems were more energy-efficient, with a 17% reduction in light energy costs. Considering planting density, high-density units of 220 plants m−2 produced more biomass per unit of area (54.0–56.6 g m−2 day−1) than did low-density units (110 plants m−2; 34.4–37.1 g m−2 day−1) and extracted more dissolved inorganic nitrogen and phosphorus. Overall, H. portulacoides can be easily cultivated hydroponically using nutrient-rich saline effluents, where LEDs can be employed as an alternative to fluorescent lighting and high-density planting can promote higher yields and extraction efficienciesThe authors thank the Portuguese Foundation for Science and Technology (FCT) for the financial support to Marco Custódio (PD/BD/127990/2016), Paulo Cartaxana (CEECIND/01434/2018) and CESAM (UIDB/50017/2020+UIDP/50017/2020). This work was also supported by the Integrated Program of SR&TD “Smart Valorization of Endogenous Marine Biological Resources Under a Changing Climate” (reference Centro-01-0145-FEDER-000018), co-funded by Centro 2020 program, Portugal 2020 and European Union, through the European Regional Development Fund, and by the project “AquaMMIn—Development and validation of a modular integrated multitrophic aquaculture system for marine and brackish water species” (MAR-02.01.01-FEAMP-0038) co-funded by Portugal 2020 and the European Union through Mar 2020, the Operational Programme (OP) for the European Maritime and Fisheries Fund (EMFF) in PortugalS

    Amazônia consiliente e Amazônia das ecologias de saberes: diálogos para a conservação da natureza em áreas protegidas

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    A conservação da natureza na Amazônia acolhe uma multiplicidade de perspectivas e pontos de vista que transitam no interregno natureza e cultura. Este artigo analisa conhecimentos nos campos das ciências naturais e das ciências sociais, com aporte de categorias ainda pouco visibilizadas pela ecologia política que se faz presente em processo de lutas pela conservação da natureza em áreas protegidas na Amazônia. Filia-se à afirmação das Epistemologias do Sul para ressignificar conceitos e evidenciar subjetividades e territorialidades para ação coletiva de resistência ao capitalismo das commodities impulsionado pelo Estado-Mercado. Aponta caminhos para complementaridades epistemológicas entre conhecimentos e saberes ecológicos identificados em práticas nas terras indígenas, reservas extrativistas e outras áreas protegidas na Amazônia

    Amazônia consiliente e Amazônia das ecologias de saberes: diálogos para a conservação da natureza em áreas protegidas

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    A conservação da natureza na Amazônia acolhe uma multiplicidade de perspectivas e pontos de vista que transitam no interregno natureza e cultura. Este artigo analisa conhecimentos nos campos das ciências naturais e das ciências sociais, com aporte de categorias ainda pouco visibilizadas pela ecologia política que se faz presente em processo de lutas pela conservação da natureza em áreas protegidas na Amazônia. Filia-se à afirmação das Epistemologias do Sul para ressignificar conceitos e evidenciar subjetividades e territorialidades para ação coletiva de resistência ao capitalismo das commodities impulsionado pelo Estado-Mercado. Aponta caminhos para complementaridades epistemológicas entre conhecimentos e saberes ecológicos identificados em práticas nas terras indígenas, reservas extrativistas e outras áreas protegidas na Amazônia

    The utility of ICD-11 and DSM-5 traits for differentiating patients with personality disorders from other clinical groups

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    Copyright © 2021 Pires, Henriques-Calado, Sousa Ferreira, Bach, Paulino, Gama Marques, Ribeiro Moreira, Grácio and Gonçalves. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.The ICD-11 Classification of Personality Disorders delineates five trait domain qualifiers (i.e., negative affectivity, detachment, dissociality, disinhibition, and anankastia), whereas the DSM-5 Alternative Model of Personality Disorders also delineates a separate domain of psychoticism. These six combined traits not only characterize individual stylistic features, but also the severity of their maladaptive expressions. It was, therefore, the aim of this study to investigate the utility of ICD-11 and DSM-5 trait domains to differentiate patients with personality disorders (PD) from patients with other mental disorders (non-PD). The Personality Inventory for DSM-5 Brief Form Plus (PID5BF+M) was administered to a sample of patients diagnosed with a personality disorder (N = 124, M age = 42.21, 42.7% females) along with a sample of patients diagnosed with other mental disorders (N = 335, M age = 44.83, 46.6% females). Group differences were explored using the independent sample t test or the Mann-Whitney U test for independent samples, and discriminant factor analysis was used to maximize group differences for each trait domain and facet score. The PD group showed significantly higher scores for the total PID5BF+M composite score, for the trait domains of negative affectivity, antagonism/dissociality, and disinhibition and for the trait facets of emotional lability, manipulativeness, deceitfulness, and impulsivity. The trait domains of disinhibition, negative affectivity, and antagonism/dissociality as well as the trait facets of impulsivity, deceitfulness, emotional lability, and manipulativeness were the best discriminators between PD and non-PD patients. The global PID5BF+M composite score was also one of the best discriminators supporting its potential as a global severity index for detecting personality dysfunction. Finally, high scores in three or more of the 18 PID5BF+M facets suggested the possible presence of a PD diagnosis. Despite some limitations, our findings suggest that the ICD-11 and DSM-5 traits have the potential to specifically describe the stylistic features that characterize individuals with PD, including the severity of their maladaptive expressions.This research was financially supported by the Fundação para a Ciência e a Tecnologia [Foundation for Science and Technology] through the Research Center for Psychological Science, CICPSI (UIDP/04527/2020) and the Business Research Unit, BRU-IUL (UIDB/00315/2020).info:eu-repo/semantics/publishedVersio

    Integral Line-of-Sight Guidance and Control of Underactuated Marine Vehicles: Theory, Simulations and Experiments

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    This paper presents an extensive analysis of the integral line-of-sight (ILOS) guidance method for path-following tasks of underactuated marine vehicles, operating on and below the sea surface. It is shown that due to the embedded integral action, the guidance law makes the vessels follow straight lines by compensating for the drift effect of environmental disturbances, such as currents, wind, and waves. The ILOS guidance is first applied to a 2-D model of surface vessels that includes the underactauted sway dynamics of the vehicle as well as disturbances in the form of constant irrotational ocean currents and constant dynamic, attitude dependent, and forces. The actuated dynamics are not considered at this point. A Lyapunov closed-loop analysis yields explicit bounds on the guidance law gains to guarantee uniform global asymptotic stability (UGAS) and uniform local exponential stability (ULES). The complete kinematic and dynamic closed-loop system of the 3-D ILOS guidance law is analyzed in the following and hence extending the analysis to underactuated autonomous underwater vehicles (AUVs) for the 3-D straight-line path-following applications in the presence of constant irrotational ocean currents. The actuated surge, pitch, and yaw dynamics are included in the analysis where the closed-loop system forms a cascade, and the properties of UGAS and ULES are shown. The 3-D ILOS control system is a generalization of the 2-D ILOS guidance. Finally, results from simulations and experiments are presented to validate and illustrate the theoretical results, where the 2-D ILOS guidance is applied to the cooperative autonomous robotics towing system vehicle and light AUV.(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other work
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