Medições do teor de oxigénio em diferentes fases da produção de vinhos

Mestrado em Viticultura e Enologia - Instituto Superior de Agronomia / Faculdade de Ciências. Universidade do PortoDue to the major interest in oxygen-wine interaction by winemakers, it seemed of the most utility to monitorize the contents of dissolved oxygen since the fermentation till the bottling in both white and red wines. The aim was to identify which processes were responsible for the greatest incorporation of dissolved oxygen, in order to minimize undesirable oxidation. This study was performed in Adega Cooperativa de Redondo, Alentejo, Portugal. The wine’s dissolved oxygen measurements were carried out using the Luminescent Dissolved Oxygen method (LDO). This method is based on the luminescence of a polymer. It is a method that is free from calibration, ensures high precision and it is highly sensitive to low concentrations of oxygen. The highest dissolution of oxygen (8,07 mg/l) occurred when using vacuum rotative filter on white must. Racking operations accompanied with turbulence generate great dissolved oxygen enrichment (4,07 mg/l in a red wine). Cold tartaric stabilization (1,90 e 2,83 mg/l in white wines and 1,51 e 3,40 mg/l in red wines) and tanker transportation (2,22 e 2,69 mg/l in white wines and 2,33 e 5,86 mg/l in red wines) are also critical points

Planificación estratégica de grandes y medias ciudades: los casos de Lisboa-Barcelona y Évora-Aveiro

El abandono de las zonas rurales y la concentración excesiva de población en las ciudades cambiaron el entorno urbano y promovieron las llamadas "ciudades concretas". El objetivo de este trabajo es promover una planificación estratégica y la gestión de las ciudades que tengan en cuenta la sostenibilidad y las generaciones futuras. Debido a la globalización que hoy presenciamos el nacimiento de una nueva civilización de carácter global, que cada vez más se volvió hacia el desarrollo de la tecnología. Las formas de distribución y de comunicación desarrollaron en los últimos 20 años a un ritmo vertiginoso. Estamos entrando en una época en la que debemos actuar rápidamente para no comprometer el futuro. Así hay un tiempo para hacer el futuro, precisamente porque todo está fluyendo. Este es el momento de actuar. Las ciudades que no tienen un desarrollo de la gestión y la estrategia serán marginalizadas por la sociedad global a corto plazo, por lo tanto la globalización económica se caracteriza por flujos de información, capitales, bienes y personas que viajan por el mundo. Las ciudades constituyen los nodos de la infraestructura y servicios de red avanzados. Configurar los organizadores y apoyo elementos de la economía mundial. Las ciudades que no se articulan en este mundo, sistema continental o regional, arroyos están marginadas del proceso de desarrollo. Este estudio pretende encontrar una manera de alcanzar los principios de sostenibilidad con planificación urbana. El trabajo está organizado para tener una idea general del tema en el mundo y específicamente en España y Portugal, dando ejemplos de grandes y medianas ciudades como Évora, Aveiro, Lisboa y Barcelona.The abandonment of rural areas and the excessive concentration of population in cities changed the urban environment and promoted the so-called "concrete cities." The objective of this work is to promote a strategic planning and management of cities that take into account the sustainability and future generations. Due to globalization we are witnessing today the birth of a new civilization of a global nature, which is increasingly turned to technology development. The forms of distribution and communication developed in the last 20 years at a dizzying pace. We are entering an era in which we must act quickly to avoid compromising the future. So there is a time for the future, precisely because everything is flowing. This is the time to act. The cities that do not have a management development and strategy will be marginalized by the global society in the short term, therefore economic globalization is characterized by flows of information, capital, goods and people traveling around the world. Cities are the nodes of infrastructure and advanced network services. Set the organizers and support elements of the global economy. The cities that are not articulated in this world, continental or regional system streams are marginalized in the development process. This study aims to find a way to achieve the principles of sustainability with urban planning. The work is organized to get an overview of the topic in the world and specifically in Spain and Portugal, giving examples of large and medium cities such as Évora, Aveiro, Lisbon and Barcelona

Computational modelling of the flow around a cylinder

Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e TecnologiaNeste trabalho apresentou-se um estudo, feito em CFD, recorrendo ao OpenFOAM®, do escoamento em torno de cilindros circulares em que o número de Reynolds (Re) variou entre 80 e 5x105, com um solver em estado laminar para 80<Re<300, e empregando o modelo de turbulência k-ω SST implementado nos casos em que 200<Re<5x105. Os parâmetros avaliados foram o valor médio de CD, o valor da média quadrática de Cl, o número de Strouhal (St) e o ângulo de separação (θs).No regime de libertação laminar de vórtices (80<Re<300), os resultados apresentaram boa concordância com os de Williamson (1996) e Fey et al. (1998). O número de Strouhal seguiu a mesma tendência das correlações St-Re apresentadas pelos autores citados, sendo que os valores absolutos obtidos foram entre 6 e 8% superiores.Foram testados três valores da escala de turbulência (l) (respetivamente, 0.1D, D e 5D) para aferir se este parâmetro altera os resultados, e confirmou-se que tal não acontecia.Nos regimes subcrítico (Re=105) e crítico (Re=2x105), os resultados apresentaram algumas discrepâncias, divergindo bastante relativamente aos valores experimentais de Achenbach (1968) e Schewe (1983), influenciados pelo valor do ângulo de separação obtido, que é superior ao apresentado na literatura.No regime supercritico (Re=5x105), os resultados mostraram boa concordância com os da literatura, em que os erros mínimos em comparação com os dados experimentais para CD, CL e St foram de 2%, 1% e 3,75% respetivamente, enquanto que o ângulo de separação foi idêntico ao valor apresentado na literatura.A CFD study was carried out, using OpenFOAM®, of the flow around circular cylinders in which Re varied between 80 and 5x105, with a laminar state solver in 80 <Re <300, and with the k-ω SST turbulence model employed at 200 <Re <5x105. The relevant parameters for this study were the mean drag coefficient (CD), the root mean square of the lift coefficient (CL), the Strouhal number (St) and the separation angle (θs). In the laminar vortex shedding regime (80 <Re <300), the results obtained were in good agreement with those of Williamson (1996) and Fey et al. (1998). The Strouhal number followed the same trend, as the correlations with Re of the authors mentioned, while the absolute values were obtained between 6 and 8% higher.Three values of the turbulence length scale (l) (0.1D, D and 5D) were tested to determine whether this parameter changes the relevant flow properties, and it was confirmed that this does not happen.In the subcritical (Re = 105) and critical (Re = 2x105) regimes, the results were poor, diverging significantly from the experimental measurements of Achenbach (1968) and Schewe (1983), influenced by the obtained value for the separation angle, which was higher than the one in data of the literature.In the supercritical regime (Re = 5x105), the results were in good agreement with the literature, with minimal errors of 2%, 1% and 3,75% for the mean drag coefficient (CD), root mean square of the lift coefficient and St, respectively, while the obtained separation angle was identical to the one in the literature

Planificación estratégica de grandes y medias ciudades: los casos de Lisboa-Barcelona y Évora-Aveiro

El abandono de las zonas rurales y la concentración excesiva de población en las ciudades cambiaron el entorno urbano y promovieron las llamadas "ciudades concretas". El objetivo de este trabajo es promover una planificación estratégica y la gestión de las ciudades que tengan en cuenta la sostenibilidad y las generaciones futuras. Debido a la globalización que hoy presenciamos el nacimiento de una nueva civilización de carácter global, que cada vez más se volvió hacia el desarrollo de la tecnología. Las formas de distribución y de comunicación desarrollaron en los últimos 20 años a un ritmo vertiginoso. Estamos entrando en una época en la que debemos actuar rápidamente para no comprometer el futuro. Así hay un tiempo para hacer el futuro, precisamente porque todo está fluyendo. Este es el momento de actuar. Las ciudades que no tienen un desarrollo de la gestión y la estrategia serán marginalizadas por la sociedad global a corto plazo, por lo tanto la globalización económica se caracteriza por flujos de información, capitales, bienes y personas que viajan por el mundo. Las ciudades constituyen los nodos de la infraestructura y servicios de red avanzados. Configurar los organizadores y apoyo elementos de la economía mundial. Las ciudades que no se articulan en este mundo, sistema continental o regional, arroyos están marginadas del proceso de desarrollo. Este estudio pretende encontrar una manera de alcanzar los principios de sostenibilidad con planificación urbana. El trabajo está organizado para tener una idea general del tema en el mundo y específicamente en España y Portugal, dando ejemplos de grandes y medianas ciudades como Évora, Aveiro, Lisboa y Barcelona.The abandonment of rural areas and the excessive concentration of population in cities changed the urban environment and promoted the so-called "concrete cities." The objective of this work is to promote a strategic planning and management of cities that take into account the sustainability and future generations. Due to globalization we are witnessing today the birth of a new civilization of a global nature, which is increasingly turned to technology development. The forms of distribution and communication developed in the last 20 years at a dizzying pace. We are entering an era in which we must act quickly to avoid compromising the future. So there is a time for the future, precisely because everything is flowing. This is the time to act. The cities that do not have a management development and strategy will be marginalized by the global society in the short term, therefore economic globalization is characterized by flows of information, capital, goods and people traveling around the world. Cities are the nodes of infrastructure and advanced network services. Set the organizers and support elements of the global economy. The cities that are not articulated in this world, continental or regional system streams are marginalized in the development process. This study aims to find a way to achieve the principles of sustainability with urban planning. The work is organized to get an overview of the topic in the world and specifically in Spain and Portugal, giving examples of large and medium cities such as Évora, Aveiro, Lisbon and Barcelona

Addressing the Biodiversity Paradox: Mismatch between the Co-Occurrence of Biological Diversity and the Human, Financial and Institutional Resources to Address Its Decline

Pressures are mounting for the adoption of a Global Biodiversity Framework that transforms conservation and sustainable use efforts worldwide. Underlying this challenge is the biodiversity paradox: biological diversity predominantly concentrates in the tropics, while human, institutional, and financial resources are primarily located at higher latitudes both north and south. Addressing the biodiversity paradox requires the expansion and mobilization of human, institutional and financial resources around the world. We outline a model championed by the IUCN Species Survival Commission (SSC) that builds on the Species Conservation Cycle (Assess-Plan-Act-Network-Communicate) and recognizes that most conservation action occurs at the national or local level. Various strategies are applied to this end by the partners of Reverse the Red, a global movement that ignites strategic cooperation and science-based action to ensure the survival of wild species and ecosystems. The SSC contributes to Reverse the Red through two primary strategies: National Species Specialist Groups and Centers for Species Survival. By building on existing expert networks and catalyzing efforts with established local institutions, we aim to significantly expand capacity to implement conservation action at the national level and reverse the negative trends indicated by the IUCN Red List of Threatened Species and the Red List of Ecosystems

Addressing the Biodiversity Paradox : Mismatch between the Co-Occurrence of Biological Diversity and the Human, Financial and Institutional Resources to Address Its Decline

Pressures are mounting for the adoption of a Global Biodiversity Framework that transforms conservation and sustainable use efforts worldwide. Underlying this challenge is the biodiversity paradox: biological diversity predominantly concentrates in the tropics, while human, institutional, and financial resources are primarily located at higher latitudes both north and south. Addressing the biodiversity paradox requires the expansion and mobilization of human, institutional and financial resources around the world. We outline a model championed by the IUCN Species Survival Commission (SSC) that builds on the Species Conservation Cycle (Assess-Plan-Act-Network-Communicate) and recognizes that most conservation action occurs at the national or local level. Various strategies are applied to this end by the partners of Reverse the Red, a global movement that ignites strategic cooperation and science-based action to ensure the survival of wild species and ecosystems. The SSC contributes to Reverse the Red through two primary strategies: National Species Specialist Groups and Centers for Species Survival. By building on existing expert networks and catalyzing efforts with established local institutions, we aim to significantly expand capacity to implement conservation action at the national level and reverse the negative trends indicated by the IUCN Red List of Threatened Species and the Red List of Ecosystems.Science, Faculty ofNon UBCOceans and Fisheries, Institute for theReviewedFacultyResearcherOthe

2nd IEF International Colloquium ROADS TO CARE: Book of Abstracts

&lt;p&gt;This book includes the program, the abstracts and all remaining details pertaining to the 2nd IEF International Colloquium ROADS TO CARE,&nbsp;held at the Faculty of Arts and Humanities of the University of Coimbra between October 19 and 21, 2022,&nbsp;organized by the R&amp;D Unit IEF - Institute for Philosophical Studies, funded by the FCT -&nbsp;Foundation for Science and Technology, I.P., of the Ministry of Science, Technology and Higher Education of the Government of the Portuguese Republic, under the UIDB/00010/2020 project.&lt;/p&gt