1,071 research outputs found

    Re.generar o centro urbano tradicional : a agregação funcional no centro histórico de Santa Maria da Feira

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    Exame público realizado em 13 de Maio de 2015.Dissertação de mestrado realizada no âmbito do Mestrado em Arquitectura.A degradação e decadência dos centros históricos é um problema consensual que muito tem inquietado a actividade do arquitecto na reabilitação. Por isso, torna-se importante perceber o que leva ao falhanço da dinamização dos centros históricos das cidades actuais. Neste sentido foram abordadas obras de alguns autores que se referem à problemática dos centros históricos, como Aldo Rossi, Nuno Portas e Teresa Barata Salgueiro e no qual nos foi possível compreender como factor principal desse falhanço a segregação funcional. Traduzindo toda esta forma de pensar bem como o conhecimento adquirido, no ensaio projectual na cidade de Santa Maria da Feira, foi possível detectar a aparente ausência de dinamismo como consequência da deficiente distribuição do mix funcional. Como resposta, abordamos a questão da agregação deste mix como factor de dinamização dos centros históricos contemporâneos.Abstract: The degradation and the decadence of the historical centers is a consensual problem that has been disturbing the activity of the architects in rehabilitation. Therefore, it’s important to understand what leads to the lack of dynamism of the historical centers in today’s cities. Accordingly, we approached the work of some authors referring to the historical centers problematic like Aldo Rossi, Nuno Portas and Teresa Barata Salgueiro becoming possible to understand functional segregation as the main cause of this failure. Translating this entire way of thinking as well as the knowledge acquired in the project test in Santa Maria da Feira, it was possible to detect the apparent absence of dynamism as a consequence of poor distribution of the functional mix. In response, we approach the issue of aggregation of this mix as dynamic factor of the contemporary historical centers

    Electroencephalogram hybrid method for alzheimer early detection

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    Alzheimer’s disease (AD) is a neurocognitive illness that leads to dementia and mainly affects the elderly. As the percentage of old people is strongly increasing worldwide, it is urgent to develop contributions to solve this complex problem. The early diagnosis at AD first stage known as Mild Cognitive Impairment (MCI) needs a better accuracy and there is not a biomarker able to detect AD without invasive tests. In this study, Electroencephalogram (EEG) signals have been used to serve as a way of finding parameters to improve AD diagnosis in first stages. For that, a hybrid method based on a Cepstral analysis of EEG Discrete Wavelet Transform (DWT) multiband decomposition was developed. Several Cepstral Distances (CD) were extracted to verify the lag between cepstra of conventional bands signals. The results showed that this hybrid method is a good tool for describing and distinguishing the AD EEG activity along its different stages because several statistically significant parameters variations were found between controls, MCI, moderate AD and advanced AD (the lowest p-value=0.003<0.05).info:eu-repo/semantics/publishedVersio

    Improving risk management practice in industrialization projects: case study of an automotive company

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    Project-based work is increasingly regarded as a powerful organizational response to the complex challenges of management, being an excellent way to integrate organizational functions with the expectations of stakeholders, with the aim of achieving higher levels of performance and productivity. However, the particular characteristics of projects lead them to be considered risky undertakings, making risk management one of the most important knowledge areas among project management practices. Knowledge management is, in turn, progressively taken into account in risk management, since many of the problems underlying risk management processes arise from scarcity of information or lack of knowledge to understand the existing information. Then, within the scope of risk management, knowledge management can provide learning from past risks in order to simplify and support the management of new risks and decision-making. The case study research methodology was applied at a plant of a first tear automotive industry supplier by using participant observation, document analysis and questionnaires to describe the current industrialization project risk management practice. Then a proposal for a risk catalog in the form of a risk database was developed to integrate information and knowledge in order to promote and support the existing and future project risk management practice

    The COVID-19 pandemic and plans for economic reopening in Brazil: a documental analysis

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    BACKGROUND: In March 2020, the World Health Organization (WHO) declared the COVID-19 outbreak a pandemic. In Brazil, the high rate of dissemination made it necessary to adopt restrictive measures nationwide with the discussion regarding the resumption of economic activities starting in April. In mid-December the country had 6,970,034 cases diagnosed and 182,799 deaths from COVID-19. OBJECTIVE: To analyze the content and characteristics of official documents, which guided the period of transition and resumption of economic activities in Brazil based on health indicators. METHODS: This is a documental research, carried out between May and July 2020, using official websites and publications from the state governments of the 27 federative units in Brazil as sources. In the study, only documents that used epidemiological and health indicators were included as determining criteria for decision making in relation to the easing, permanence or regression of social isolation measures adopted during the COVID-19 pandemic. FINDINGS: Plans, decrees and technical notes were identified for 18 Brazilian federal units. In most documents, the scientific team was made up exclusively of technicians (n = 10). The number of indicators found ranged from 2 to 11, being stratified into 5 categories: frequency and distribution of the disease; social and collective adherence; installed capacity or service profile; productive potential; and availability of supplies. MAIN CONCLUSIONS: Knowing governmental strategies, adopted in the easing of restrictive measures, in the face of the coronavirus (SARS-CoV-2) pandemic based on indicators and with the possibility of comparison between different federative units, provides subsidies for understanding the outcome of the disease by place of occurrence, allowing the construction of a panorama pathology in the country. The appropriation of the findings of this study by Brazil and other countries also serves as an instrument for reflection and planning of policies adopted during the COVID-19 pandemic

    Burnout among Portuguese healthcare workers during the COVID-19 pandemic

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    During COVID-19 pandemic, healthcare workers (HCWs) have had high workload and have been exposed to multiple psychosocial stressors. The aim of this study was to evaluate HCWs in terms of the relative contributions of socio-demographic and mental health variables on three burnout dimensions: personal, workrelated, and client-related burnout. Methods: A cross-sectional study was performed using an online questionnaire spread via social networks. A snowball technique supported by health care institutions and professional organizations was applied. Results: A total of 2008 subjects completed the survey. Gender, parental status, marriage status, and salary reduction were found to be significant factors for personal burnout. Health problems and direct contact with infected people were significantly associated with more susceptibility to high personal and work-related burnout. Frontline working positions were associated with all three dimensions. Higher levels of stress and depression in HCWs were significantly associated with increased levels of all burnout dimensions. Higher levels of satisfaction with life and resilience were significantly associated with lower levels of all burnout dimensions. Conclusions: All three burnout dimensions were associated with a specific set of covariates. Consideration of these three dimensions is important when designing future burnout prevention programs for HCWs.info:eu-repo/semantics/publishedVersio

    Modeling biomass and nutrients in a eucalyptus stand in the cerrado

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    The prediction of biological processes, which involve growth and plant development, is possible via the adjustment of mathematical models. In forest areas, these models assist in management practices, silviculture, harvesting, and soil fertility. Diameter, basal area, and height are predictors of volume and biomass estimates in forest stands. This study utilized different non-linear models for estimating biomass and nutrient values in the aerial biomass and roots of an unmanaged eucalypt stand in Cerrado dystrophic soil. It was hypothesized that the models would estimate the nutrients of the aboveground biomass and roots after meeting the selection and validation criteria. By statistical analysis of the parameters and subsequent validation, the Schumacher–Hall model was presented to be the best fit for biomass and nutrients. This result confirmed the ability of different variables, including diameter, basal area, and height, to be predicted. Estimating the nutrient values in the aboveground biomass and roots allowed a better understanding of the quality of the vegetal residues that remained in the soil. For dystrophic soils, which occur in the Cerrado, these estimates become even more relevant

    Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

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    A measurement of the cosmic-ray spectrum for energies exceeding 4×10184{\times}10^{18} eV is presented, which is based on the analysis of showers with zenith angles greater than 6060^{\circ} detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above 5.3×10185.3{\times}10^{18} eV, the "ankle", the flux can be described by a power law EγE^{-\gamma} with index γ=2.70±0.02(stat)±0.1(sys)\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)} followed by a smooth suppression region. For the energy (EsE_\text{s}) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find Es=(5.12±0.25(stat)1.2+1.0(sys))×1019E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19} eV.Comment: Replaced with published version. Added journal reference and DO
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