1,495 research outputs found

    Wiinteraction: a study on smart spaces interaction using the Wiimote

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    This paper describes a study on the use of the Wiimote as a generic interaction device for smart spaces. We have identified the range of interaction possibilities that can be explored when creating Wii-based interfaces for smart spaces and we have explored the application of those interactive features in the context of a typical museum guide. While there are many features that can be explored creatively to sustain the use of the Wiimote as a generic interaction device, we also found that there is at least one critical requirement that is not supported. More specifically, we have identified the need to include access to rich information, such as the one provided by digital displays. We thus propose a shared control mechanism for public displays that enables a user equipped with a Wiimote to first gain control and then browse information in a public display. The results of our study show no major limitation in the proposed approach, but identify device discovery as one major technical flaw that still needs to be overcome before the wiimotemay realistically become a generic interaction alternative for smart spaces

    Intelligence, Surveillance & Reconnaissance como agente de mudança: Uma abordagem a Operações Baseadas em Efeitos na Força Aérea Portuguesa

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    O recente conceito desenvolvido pelos membros da Organização do Tratado do Atlântico Norte (OTAN) para a capacidade de Intelligence, Surveillance & Reconnaissance (ISR), representa uma visão estratégica que impõe a todos os membros da Aliança uma viragem nas suas estruturas militares nunca antes vista. Considerado como uma capacidade crítica para o sucesso das operações militares contemporâneas e futuras, o conceito de ISR da Aliança rompe definitivamente com estruturas da era industrial onde a compartimentação do conhecimento (“need-to-know”) é entendida como a chave do sucesso e impõe agora, numa lógica de otimização de recursos, a era da informação onde a partilha de conhecimento (“need-to-share”) se assume como um conceito soberano para o êxitono espaço de batalha. Esta investigação analisa as recomendações da Aliança, compara as mesmas com o conceito utilizado pela Força Aérea Portuguesa (FAP), contextualizando este à luz dos documentos nacionais enquadradores da atividade militar, para no final tecer uma série de recomendações que visam otimizar o produto operacional resultanteda atividade de ISR onde se destaca um novo modelo conceptual e um novo frameworkpara a FAP.Abstract The concept recently developed by the members of the North Atlantic Treaty Organization (NATO) for the Intelligence, Surveillance & Reconnaissance (ISR) capability, is a strategic vision that imposes to all members of the Alliance a turning point in its military structures as never seen before. Considered as a critical capability for the success on contemporary and future military operations, the Alliance ISR concept definitely breaks with the structures from the industrial era, where the compartmentalization of knowledge known as "need-to-know" was the key to success and imposes now, on a optimization logic resource, the information age where sharing knowledge - "need-to-share" - is assumed as a paramount concept to achieve success in the battle space. This research analyzes the recommendations of the Alliance, it also compares them with the concept of the Portuguese Air Force (PAF) and contextualizes it with national documents, framers of the military activity, to end in weaving a series of recommendations that optimizes the resulting operational product from ISR activity which highlights a new conceptual model and a new framework for PAF

    Uma abordagem a Operações Baseadas em Efeitos na Força Aérea Portuguesa

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    O século XXI introduziu profundas mudanças no espaço onde a atuação militar se desenvolve. Esta mutação, que agora inclui o domínio físico e cognitivo na ação militar, impõe a adoção de novos conceitos de operação e estruturas organizacionais mais ágeis, de forma a fazerem face a um ambiente altamente volátil, imprevisível e complexo. Tal contexto torna as organizações, hoje mais do que nunca, dependentes de informação (e dos sistemas que as geram), e no âmbito das organizações militares, uma capacidade em particular assume, na atualidade, uma preponderância fulcral para o sucesso destas, que se designa por Intelligence, Surveillance & Reconnaissance (ISR). Considerando a complexidade de sistemas, processos e pessoas que envolvem toda esta capacidade, torna-se relevante estudar como a Força Aérea Portuguesa (FAP) está a acomodar este conceito no interior da sua estrutura, uma vez que a sua adaptação requer uma organização da era da informação, onde o trabalho em rede assume particular destaque. A presente investigação analisa formas de estruturas organizacionais contemporâneas e cruza-as com as recomendações da Organização do Tratado do Atlântico Norte (também designada por Aliança), comparando-as posteriormente com a atualidade da FAP. No final, são efetuadas propostas tangíveis, que podem potenciar as capacidades existentes, de onde se destaca a criação de uma matriz de análise quanto à eficiência organizacional, uma nova forma de organização das capacidades residentes no que ao ISR concerne, bem como o modo de potenciar o trabalho em rede com base nos meios existentes. Abstract: The 21st century has caused profound changes in the areas where military action takes place. This mutation, which now includes the physical and cognitive domain in military action, requires the adoption of new concepts of operation and more agile organizational structures in order to cope with a highly volatile, unpredictable and complex environment. Thus, more than ever, this makes the present organizations dependent of information (and the systems that generate them), in the case of military organizations, a particular capability undertakes today a strong impact on the success of military organizations. It is known as Intelligence, Surveillance& Reconnaissance (ISR). Taking into account the complexity of systems, processes and people involving all this capability, it is relevant to study how the Portuguese Air Force (PAF) is accommodating this concept within its structure, since the adaptation requires an organization adapted to the information era, where networking is particularly prominent. This research aims to analyze contemporary forms of organizational structures and cross them with the recommendations of the North Atlantic Treaty Organization (also known as Alliance), later comparing them with today's PAF. At the end of this investigation, some tangible proposals are made which can enhance existing capabilities: we can highlight the creation of an analysis matrix for organizational efficiency, a new form of organization of the resident capabilities in the ISR concerns, as well as the way of enhancing networking, based on existing means

    Carbon neutrality pathways effects on air pollutant emissions: The Portuguese case

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    Funding Information: Funding: This research was based on the outcomes from the Portuguese Carbon Neutrality Roadmap 2050, a project supported by the Ministry of Environment and Energy Transition of the Portuguese Republic. The research work developed at CENSE is financed by the Portuguese Foundation for Science and Technology (FCT) through the strategic project UIDB/04085/2020.Air pollution and climate change are closely interlinked, once both share common emission sources, which mainly arise from fuel combustion and industrial processes. Climate mitigation actions bring co-benefits on air quality and human health. However, specific solutions can provide negative trade-offs for one side. The Portuguese Carbon Neutrality Roadmap was developed to assess conceivable cost-effective pathways to achieve zero net carbon emissions by 2050. Assessing its impacts, on air pollutant emissions, is the main focus of the present work. The bottom-up linear optimization energy system the integrated MARKAL-EFOM system (TIMES) model was selected as a modeling tool for the decarbonization scenarios assessment. The estimation of air pollutant emissions was performed exogenously to the TIMES model. Results show that reaching net zero greenhouse gas (GHG) emissions is possible, and technologically feasible, in Portugal, by 2050. The crucial and most cost-effective vector for decarbonizing the national economy is the end-use energy consumption electrification, renewable based, across all end-use sectors. Decarbonization efforts were found to have strong co-benefits for reducing air pollutant emissions in Portugal. Transport and power generation are the sectors with the greatest potential to reduce GHG emissions, providing likewise the most significant reductions of air pollutant emissions. Despite the overall positive effects, there are antagonistic effects, such as the use of biomass, mainly in industry and residential sectors, which translates into increases in particulate matter emissions. This is relevant for medium term projections, since results show that, by 2030, PM2.5 emissions are unlikely to meet the emission reduction commitments set at the European level, if no additional control measures are considered.publishersversionpublishe

    Evolution of Siderian juvenile crust to Rhyacian high Ba-Sr magmatism in the Mineiro Belt, southern São Francisco Craton

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    Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust. Rocks mostly belong to the calc-alkaline series, meta- to peraluminous and originally “I-type”, meaning that oxidized magmas were formed by partial melting of subducted material. The temporal distribution and apparent secular changes of the magmas are consistent with the onset of subduction-driven plate tectonics due to an increase of the subduction angle and opening of the mantle wedge. New isotopic analyses (Sm-Nd whole rock and Lu-Hf in zircon) corroborate the restricted juvenile nature of the Mineiro Belt and confirm the genetic link between the Lagoa Dourada Suite, a rare ca. 2350 Ma high-Al tonalite-trondhjemite magmatic event, and the sanukitoid-type ca. 2130 Ma Alto Maranhão Suite. U-Pb dating of zircon and titanite constrain the crystallisation history of plutonic bodies; coupled with major and trace element analyses of the host rocks, they distinguish evolutionary trends in the Mineiro Belt. Several plutons in the region have ages close to 2130 Ma but are distinguished by the lower concentration of compatible elements in the juvenile high Ba-Sr suite. Keywords: São Francisco Craton, Magmatic lull, TTG-Sanukitoid transition, Zircon U-Pb-Hf, Titanite U-Pb, Whole rock Nd isotope

    Proliferative Endometrial Lesions Hidden behind the Feline Pyometra

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    The literature refers to pyometra as the most important pathology in the feline uterus, which is often associated with cystic endometrial disease (cystic endometrial hyperplasia/pyometra complex or CEH-Pyo). The etiology of pyometra is complex and probably multifactorial, but hormonal influences are suggested to play an important role in the pathogenesis. Progestagen-based contraceptives may be risk factors for the CEH-Pyo syndrome, for endometrial adenocarcinoma and also to mammary tumors in this species

    Philosophical Research in Brazil: A Structural Topic Modeling Approach with a focus on Temporal and Gender Trends

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    This paper employs structural topic modeling (STM), a text-mining technique, to describe the academic philosophy landscape in Brazil. Based on a public national database, a corpus consisting of 12,515 abstracts of monographs (theses and dissertations) defended in Philosophy Graduate Programs between 1991 and 2021 was compiled. The final STM model identified 74 meaningful research topics, clustered into 7 thematic categories. This study discusses the prevalence of the most significant topics and categories, their trends across three decades and their (positive or negative) association with the supervisor’s gender. Results show the first empirical evidence that Brazilian philosophical research exhibits a greater focus on philosophers and their works, rather than on specific themes or problems, aligning with common sociological perceptions within the academic community. Moreover, by visualizing the variations in topic prevalence over time, it was possible to track the rise or decline of the major interest categories and topics. Finally, results also show how topics related to male philosophers garner greater attention throughout the corpus and which topics are more or less influenced by gender

    Avaliação de Desempenho de Transmissões de Vídeo 2K e 4K sobre Redes Sem Fio em um Cenário Indoor / Performance Evaluation of 2K and 4K Video Transmissions over Wireless Networks in an Indoor Setting

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    Com o crescimento do tráfego multimídia, com foco especial nos vídeos de alta resolução, percebe-se a existência de diversos desafios a serem contornados. Um destes pode trazer insatisfação ao usuário final diante do serviço prestado, se refere a qualidade percebida após o recebimento do streaming ou vídeo. Neste sentido, este trabalho realiza a avaliação de desempenho dos vídeos com resoluções em 2K e 4K, em cenário real indoor. Para este estudo empírico, utilizam-se métricas de análise objetiva como PSNR, VQM e SSIM, e uma subjetiva, o MOS, que representa uma opinião média do usuário após reprodução do vídeo. As principais ferramentas utilizadas neste estudo foram os frameworks EvalVid e MSU Video Quality. 

    Evolution of Siderian juvenile crust to Rhyacian high Ba-Sr magmatism in the Mineiro Belt, southern S?o Francisco Craton.

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    Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust. Rocks mostly belong to the calc-alkaline series, meta- to peraluminous and originally ?I-type?, meaning that oxidized magmas were formed by partial melting of subducted material. The temporal distribution and apparent secular changes of the magmas are consistent with the onset of subduction-driven plate tectonics due to an increase of the subduction angle and opening of the mantle wedge. New isotopic analyses (Sm-Nd whole rock and Lu-Hf in zircon) corroborate the restricted juvenile nature of the Mineiro Belt and confirm the genetic link between the Lagoa Dourada Suite, a rare ca. 2350 Ma high-Al tonalite-trondhjemite magmatic event, and the sanukitoid-type ca. 2130 Ma Alto Maranh?o Suite. U-Pb dating of zircon and titanite constrain the crystallisation history of plutonic bodies; coupled with major and trace element analyses of the host rocks, they distinguish evolutionary trends in the Mineiro Belt. Several plutons in the region have ages close to 2130 Ma but are distinguished by the lower concentration of compatible elements in the juvenile high Ba-Sr suite

    Efeito extrapiramidal induzido por metaclopramida e outros santidopaminérgicos e antipsicóticos e uso de biperideno na reversão do quadro/Extrapyramidal effect induced by metaclopramide and other antidopaminergics and antipsychotics and use of biperidene in the reversal of the frame

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    Além dos efeitos adversos relacionados ao sistema motor, pacientes com síndrome extrapiramidal induzida por medicamentos, a exemplo da metaclopramida podem apresentar efeitos extrapiramiadais, necessitando da intervenção de outros fármacos para reduzir tais efeitos colaterais. Desta forma, objetivou-se com este estudo realizar uma análise integrativa dos efeitos extrapiramidais em pacientes induzidos por metaclopramida e outros antipaminérgicos e antipsicóticos e o uso de biperideno na reversão do quadro. Realizou-se um levantamento bibliográfico nas seguintes bases de dados:  Science Direct, Scielo, PubMed e Google Acadêmico. A pesquisa inicial utilizando os descritores citados, resultou em 32 artigos, no entanto 9 foram estudados de forma mais detalhada. Os artigos analisados foram publicados entre os anos de 2009 a 2020. Os sintomas extrapiramidais, são efeitos secundários de medicamentos em que o mecanismo de ação consiste no bloqueio de dopamina. Os resultados obtidos no estudo aqui apresentado, demostraram ser necessário o uso de biperideno em alguns pacientes, para reversão de situações clinicas negativas decorrentes do uso da metaclopramida. Entretanto, deve-se ressaltar a existência de dificuldades para o desenvolvimento deste estudo, pois na literatura atual, não se tem estudos detalhados a respeito dos efeitos extrapiramidais induzidos por metaclopramida e uso de biperideno na reversão do quadro
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