ESCOLA SUPERIOR DE TECNOLOGIA E GESTÃO DE VISEU
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- 1st International Workshop: Zero Pollution for a Healthier Planet and People: Book of AbstractsPublication . Cruz-Lopes, Luísa; Brás, Isabel; Silva, Maria; Rodrigues, Nuno; Lopes, SérgioThe scientifically proven systemic threats and risks associated with climate change, loss of biodiversity and increased pollution have led the European Commission to propose a European Ecological Pact (Green Deal). This Pact sets the framework for the European Union's growth policy to be adopted, with the aim of building a carbon neutral economy in 2050, more effective in the use of materials, with less pollution and regenerating biodiversity and environmental services. European policies are based on several legal documents that translate the objectives of preventing waste production, recovery of materials and final treatment of non-recoverable waste. They refer, for example, to the obligation to implement separate bio-waste collection networks or to separate and recycle in the source of the bio-waste, as well as a goal of reducing landfill: Member States should seek to ensure that, starting from 2030, no suitable waste for recycling or other recovery can be deposited in landfills. In this sequence, producers and operators of waste management ensure that waste is collected separately, to facilitate and promote its management in compliance with the principle of the hierarchy of waste. It is important that measures are implemented to achieve these objectives and that citizens are informed of the good practices that they must adopt in order to jointly promote a healthier environment. This partner event offers the presentation to the society of the strategies in Portugal to accomplish the Green Deal goals and the local measures to do the bio-wates management as well as share of good practices in waste management, in a perspective of circular economy. Several research and development works are being presented, in different areas, to promote a perspective of Zero Pollution. It is also proposed to do a citizen’s tour to the regional Solid Waste Integrated Management Centre. The final activity expects to engage citizens in out-door activities: Biodanza and Yoga, to promote healthier people.
- 2nd International Workshop: Zero Pollution – Make it RealPublication . Cruz-Lopes, Luísa; Brás, Isabel; Silva, Maria; Rodrigues, Nuno; Lopes, SérgioThe large share of energy consumed at the industrial level is derived from fossil, nuclear and renewable sources. Fossil fuels are identified as one of the main sources of carbon emissions and cause of climate change. Global carbon dioxide (CO2) emissions from fossil fuels and industry have increased considerably since 2000, and in 2019 reached a record high of 36.7 billion metric tons of CO2. Environmental issues, especially climate change, have become hot topics around the world in recent years due to the magnitude and scope of their impacts. Carbon dioxide and greenhouse gases emitted by human activities, particularly related to energy consumption, have changed weather patterns around the world, causing extreme weather conditions such as hurricanes, drought, excessive rainfall and unusual temperatures. Many countries are trying to diversify the focus of primary energy sources, from fossil fuels to other sources, notably renewable energy. This situation has a particular interest in a global crisis arising from the war in Europe. The sources of energy must be diversified. EU Green Week is an annual event where the objective is to debate European environmental policy towards a resourceefficient and climate-neutral Europe by 2050. This year’s edition focuses on the European Green Deal and puts three important aspects into highlight the circular economy, zero pollution and biodiversity. In Viseu, the good practices role in the industry towards zero pollution, with particular focus in the efficient energy usage and resilient practices, was discussed.
- 3D Map and DGPS Validation for a Vineyard Autonomous Navigation SystemPublication . Contente, Olga; Aranha, José; Martinho, José; Morgado, José Francisco; Reis, Manuel; Fereira, Paulo; Morais, Raul; Lau, NunoAn autonomous DGPS navigation system must use an accurate threedimensional (3D) digital map. However, it is crucial to validate it using data collected in the field. One possible way to validate the map is to employ a vehicle driven by an expert to ensure that the trajectory is plotted within the boundaries of navigation paths. It is essential to take this care, especially when the terrain is very highly uneven and small differences in position may correspond to large vertical deviations. A small navigation error can result in a serious fall, which may damage or even destroy the vehicle. In the Douro Demarcated Region, in northern Portugal, the vineyard is planted on narrow terraces built on steep hills along the winding Douro River. This paper presents the results of a dynamic trajectory survey obtained from a real navigation procedure, carried out by an expert driving an instrumented tractor during the spraying of the vineyard. The results were obtained using a DGPS (accuracy = 2 cm) and compared to an existing Digital Elevation Model (DEM) of the vineyard already created by the authors’ work group, with an average accuracy of 10 cm. The results are shown in a C# developed interface with OpenGL facilities, which enable the viewing of the 3D vineyard details. The results confirm the validation of the methodology previously adopted for map extraction and respective equipment selection. The trajectory of the tractor, including some maneuvers, is drawn within the inner and outer edges of each terrace or path that exists in the vineyard. The interface can also be used as an important tool in path planning to automatically extract the topology of the vineyard and to select the best path to carry out some vineyard tasks.
- O ABC do Geometer's SketchpadPublication . Duarte, Isabel; Cavaleiro, JoãoO Geometer’s Sketchpad, sendo um software de geometria dinâmica permite-nos abordar conceitos de geometria de uma maneira inovadora.
- Accuracy of ultrasound in the diagnosis of acute cholecystitis with coexistent acute pancreatitisPublication . Pereira, J.; Afonso, A.; Constantino, J.; Matos, A.; Henriques, C.; Zago, M.; Pinheiro, L.Acute cholecystitis and pancreatitis are acute forms of cholecystolithiasis. The presence of acute cholecystitis can lead to important changes in therapy in the early course of acute pancreatitis. The aim of this study was to identify the accuracy of ultrasonography in diagnosing acute cholecystitis with coexistent acute pancreatitis.
- Accurate Spectral Estimation of Non-periodic Signals Based on Compressive SensingPublication . Duarte, Isabel M. P.; Vieira, José M. N.; Ferreira, Paulo J S G; Albuquerque, DanielIn this work we propose a method based on compressive sensing (CS) for estimating the spectrum of a signal written as a linear combination of a small number of sinusoids. In practice one deals with signals with finite-length and so the Fourier coefficients are not exactly sparse. Due to the leakage effect in the case where the frequency is not a multiple of the fundamental frequency of the DFT, the success of the traditional CS algorithms is limited. To overcome this problem our algorithm transform the DFT basis into a frame with a larger number of vectors, by inserting a small number of columns between some of the initial ones. The algorithm takes advantage of the compactness of the interpolation function that results from the ‘1 norm minimization of the Basis Pursuit (BP) and is based on the compressive sensing theory that allows us to acquire and represent sparse and compressible signals, using a much lower sampling rate than the Nyquist rate. Our method allow us to estimate the sinusoids amplitude, phase and frequency.
- Acompanhamento da avaliação de desempenho ambiental e otimização de processos de tratamento de efluentes industriais da Borgstena Textile PortugalPublication . Vicente, Cátia Andreia Vieira; Brás, Isabel Paula LopesA realização do presente relatório resulta do estágio curricular desenvolvido no âmbito do Mestrado em Tecnologias Ambientais da Escola Superior de Tecnologia e Gestão de Viseu, durante o período de 21 de Novembro de 2011 a 31 de Maio de 2012, na empresa Borgstena Textile Portugal. Esta dedica-se à produção de têxteis para o setor automóvel e localiza-se em Nelas. O trabalho desenvolvido abraçou dois objetivos principais. Numa primeira fase envolveu a aplicação de conhecimentos relacionados com a gestão ambiental da organização e atividades afins, nomeadamente o preenchimento de matrizes de significância dos impactes ambientais. Estas matrizes envolvem o conhecimento/atualização da legislação aplicável às atividades da instalação e da determinação dos aspetos e seus impactes no ambiente. O segundo objetivo visou o desenvolvimento de estudos na área do tratamento de águas residuais industriais que permitiram, além de perceber o funcionamento de uma estação de tratamento de águas residuais industriais (ETARI), avaliar a necessidade e importância da aplicação de um tratamento físico-químico adequado. As indústrias têxteis, devido ao processo de fabricação do tecido, produzem efluentes corados, de características químicas muito próprias e inconstantes, pelo que requerem etapas de tratamento específicas e adequadas às características do efluente de elevada toxicidade e carga orgânica. Foram realizados ensaios de tratabilidade da água, de onde foi possível retirar informação por forma a sugerir algumas otimizações possivelmente alternativas ao processo de tratamento existente. O cumprimento dos objetivos propostos permitiu determinar que o contacto com as situações reais de uma organização são uma forte ferramenta no crescimento profissional e pessoal, permitindo a consolidação e aquisição de conhecimentos.
- Acoustics evaluation of school buildingsPublication . Pinho, Paulo; Pinto, Manuel; Almeida, Ricardo; Lemos, LuísThis paper presents results of the acoustic evaluation of eight school buildings in urban and peri-urban areas of the city of Viseu. Acoustics evaluation of school buildings was made by measurements of: reverberation time in classrooms, sound insulation between classrooms and between classrooms and corridors; impact sound insulation of floors and airborne sound insulation of façade. The sound insulation of façade was made with all elements closed and with natural ventilation conditions (banners or windows tilt mode). It was found that only two studied school buildings meet, for the performed tests, the legal requirements established in Portugal. The remaining six school buildings revealed disabled constructive aspects in relation to the acoustic requirements of school buildings compromising the quality of education.
- Active learning during the covid-19 pandemic - A triple experimentPublication . Santos, Vanda; Hall, Andreia; Bastos, Nuno; Caridade, CMRIn recent times, the debate on active methodologies has been intensified with the emergence of strategies that can favor students' autonomy. The active, dynamic and constructive environment can positively influence the perception of teachers and students. One of the ways to achieve this is through the use of technologies that enhance learning. Due to the pandemic situation, the use of technologies was imperative and essential. Three higher education institutions were involved in an active learning project, involving diversified technologies and methodologies to enhance the learning of mathematics. In the University of Aveiro, the experiment involved all the 1st-year students enrolled in the course “Complementary Mathematics II” during the second semester of the academic year 2020-21. These are students of a master’s program for pre-service teachers, preparing to become primary school teachers and mathematics and science teachers, grades 5 and 6. At the Institute of Engineering in Coimbra, the students who attended this experiment were students of Mathematical Analysis I, from the undergraduate degree in Electrical Engineering. In the Polytechnic Institute of Viseu, the students involved in this experiment were students from the Preparation Course in Mathematics (which aims to prepare candidates over 23 who wish to apply to an undergraduate degree in Business). The methodologies used were applied during three distinct phases and according to the students’ profile, related to each course. The methodologies used were very diverse: team-based learning; flipped classroom; peer teaching; think-pair-share and exposition followed by exercise practice; problem-based learning and inquiry-based learning. The technologies were also very diversified: Desmos, Kahoot!, Quizizz, GeoGebra, Excel, OneNote, Google Docs, Zoom, Miro, Wolfram alpha, Powerpoint, calculators and videos. The use of a wide range of methodologies and technologies made it possible to teach during the lockdown imposed by the pandemic situation, and simultaneously motivated the students. In addition they provided opportunities to adapt the learning process to the diverse knowledge and learning styles of students, and increased their involvement.
- Activities with desmos and geogebra for formative and automatic feedbackPublication . Santos, V.; Bastos, NunoThe study developed here was carried out within the scope of a National Meeting “19.º MatViseu” with secondary school mathematics teachers in a workshop entitled Desmos and GeoGebra: activities with automatic feedback and formative”. The objectives were to articulate the mathematics curriculum and essential learning program, and to explore activities that use some of the strengths of Desmos and GeoGebra to provide feedback to students and develop some activities with feedback appropriate to the level of education they teach. This National Meeting was organized with plenary sessions (invited speakers) and parallel sessions (workshops). In-service teacher training is an essential element to help them to adapt to different curricula and new methods and resources in their professional careers. This study aims to understand how the use of these two platforms can allow a different approach in their classes. The research methodology adopted consists of a case study, relating to a group of teachers who worked autonomous in this workshop. Essentially, a qualitative approach was adopted through the interpretation of data collected through observation, interaction in these platforms and a brief questionary. We can conclude that using the GeoGebra platform requires prior preparation, essentially with GeoGebraScript and with the Desmos platform it was easier to work with the Computation Layer language, although GeoGebraScript and Computation Layer language are new for most of them. Thus, it is recommended that in future training, the creation of strategies and dynamics of preparation for work in the GeoGebraScript and in the Desmos language, to carry out a complete work. However, it is important to keep in mind that the GeoGebra platform was known to most of the participants, but Desmos was not and that the sample is not significant to draw general conclusions.