Pub Date : 2023-11-24DOI: 10.24840/2183-6493_009-005_001862
Jorge Afonso
Austerity urbanism is an explanatory concept that alerts planners, politicians and society. The tripartite explanation of the concept of Austerity: as a result, solution, or even as a cause is part of the knowledge of this research article. Austerity embedded in the political choices of neoliberalism. Austerity rooted in the liberal thinking. Austerity Urbanism intertwined with: destructive creativity, deficit politics and devolved risk. After years of Austerity (Urbanism), governments are still ill-prepared to deal with the current urban crisis. New democratic instruments are needed to regain control over capital and to reform, modernize economic and social redistributive efficiency and effectiveness.
{"title":"Austerity Urbanism: From Redistributive transfers to debt based finance","authors":"Jorge Afonso","doi":"10.24840/2183-6493_009-005_001862","DOIUrl":"https://doi.org/10.24840/2183-6493_009-005_001862","url":null,"abstract":"Austerity urbanism is an explanatory concept that alerts planners, politicians and society. The tripartite explanation of the concept of Austerity: as a result, solution, or even as a cause is part of the knowledge of this research article. Austerity embedded in the political choices of neoliberalism. Austerity rooted in the liberal thinking. Austerity Urbanism intertwined with: destructive creativity, deficit politics and devolved risk. After years of Austerity (Urbanism), governments are still ill-prepared to deal with the current urban crisis. New democratic instruments are needed to regain control over capital and to reform, modernize economic and social redistributive efficiency and effectiveness.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"18 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139240867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-24DOI: 10.24840/2183-6493_009-005_001565
I. A. Nhamage
The emerging Digital Twins have brought great revolution in the processes of monitoring and managing assets such as bridges. This work, which is part of a pilot project, aims to evaluate and simulate the fatigue behavior in metallic railway bridges (MRB) supported by a Digital Twin, which in turn is based on Building Information Modeling (BIM) capabilities. An integrated system based on appropriate software and consisting of three main modules (Input Module; Calculation Module; Output Module) is assembled. The current stage is promising, being possible not only to estimate the fatigue damage for different scenarios but also to visualize it and access other damage-related information.
{"title":"Development of BIM-Based Digital Twin Model for Fatigue Assessment in Metallic Railway Bridges","authors":"I. A. Nhamage","doi":"10.24840/2183-6493_009-005_001565","DOIUrl":"https://doi.org/10.24840/2183-6493_009-005_001565","url":null,"abstract":"The emerging Digital Twins have brought great revolution in the processes of monitoring and managing assets such as bridges. This work, which is part of a pilot project, aims to evaluate and simulate the fatigue behavior in metallic railway bridges (MRB) supported by a Digital Twin, which in turn is based on Building Information Modeling (BIM) capabilities. An integrated system based on appropriate software and consisting of three main modules (Input Module; Calculation Module; Output Module) is assembled. The current stage is promising, being possible not only to estimate the fatigue damage for different scenarios but also to visualize it and access other damage-related information.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139241333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-08DOI: 10.24840/2183-6493_009-002_001756
Cecília Silva, Marcelo Altieri, João Filipe Teixeira
It is easy to understand why the idea of a 15-minutes city, providing most everyday amenities within 15-minutes travel time, has become so appealing to city officials and citizens in the last decades, and with particular strength, in the last few years following the COVID-19 pandemic. The explicit reduction of both travel distance and time are, in themselves, tantalizing for societies in need of coping with major challenges, such as, global warming, sustainable development, car-dependent cities, lack of quality urban spaces, and quality of life. Regardless, such prescriptive strategy seems to be at odds with less dense urban environments found in sprawl, the majority of suburban development and even some urban centres.
Using the idea of a 15-minutes city as an analytical lens instead of a prescriptive policy, this paper aims to explore the diversity of settings for the 15-minutes city, using a metropolitan area as testbed for its diversity of urban and suburban contexts. Our research explores the diversity of accessibility conditions currently offered at 15-minutes walking time (grouped into typologies), using network-based accessibility measures at the census tract level.
Our analysis of the core municipalities of the metropolitan area of Porto revealed 6 main typologies for the 15-minutes city with roughly 18% of the population able to reach all of the considered amenities while 1% has none at 15-minutes walking. Although some areas seem able to move up in the referred typologies through policies such as the ones prescribed by the 15-minutes city concept, others seem unable to make the change. Uniformity does also not necessarily seem desirable for the different urban context encountered. Finally, forcing fashionable concepts, as this one, onto urban areas may come at the expense of the underlying sustainability concerns they were developed to encourage.
{"title":"Exploring the 15-minutes city: the metropolitan context of Oporto","authors":"Cecília Silva, Marcelo Altieri, João Filipe Teixeira","doi":"10.24840/2183-6493_009-002_001756","DOIUrl":"https://doi.org/10.24840/2183-6493_009-002_001756","url":null,"abstract":"It is easy to understand why the idea of a 15-minutes city, providing most everyday amenities within 15-minutes travel time, has become so appealing to city officials and citizens in the last decades, and with particular strength, in the last few years following the COVID-19 pandemic. The explicit reduction of both travel distance and time are, in themselves, tantalizing for societies in need of coping with major challenges, such as, global warming, sustainable development, car-dependent cities, lack of quality urban spaces, and quality of life. Regardless, such prescriptive strategy seems to be at odds with less dense urban environments found in sprawl, the majority of suburban development and even some urban centres.
 Using the idea of a 15-minutes city as an analytical lens instead of a prescriptive policy, this paper aims to explore the diversity of settings for the 15-minutes city, using a metropolitan area as testbed for its diversity of urban and suburban contexts. Our research explores the diversity of accessibility conditions currently offered at 15-minutes walking time (grouped into typologies), using network-based accessibility measures at the census tract level.
 Our analysis of the core municipalities of the metropolitan area of Porto revealed 6 main typologies for the 15-minutes city with roughly 18% of the population able to reach all of the considered amenities while 1% has none at 15-minutes walking. Although some areas seem able to move up in the referred typologies through policies such as the ones prescribed by the 15-minutes city concept, others seem unable to make the change. Uniformity does also not necessarily seem desirable for the different urban context encountered. Finally, forcing fashionable concepts, as this one, onto urban areas may come at the expense of the underlying sustainability concerns they were developed to encourage.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":" 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_002162
Artur Farinha, Luís Santos, José Costa
Perovskite solar cells (PSCs) have emerged as a promising technology for renewable energy generation due to their low cost and low carbon footprint compared to traditional silicon-based solar cells. However, some main challenges associated with PSCs lie ahead, namely their toxicity and lack of stability, particularly under factors such as light, temperature, oxygen, and humidity. We focus on the lack of stability of PSCs and the various ways it can be mitigated. We explore the use of vapor deposition methods, which can increase the crystallinity of the perovskite and thus improve stability and lifetime. Furthermore, we look into the potential of ionic liquids (ILs) as promising materials for improving the stability and performance of PSCs. ILs have advantageous physicochemical properties that make them suitable as an additive or interfacial layer in PSCs. They optimize the interface contact, improve energy level matching, suppress ion migration, and increase hydrophobicity, which inhibits the decomposition of the device in humid environments. ILs have also been used as precursors in the solution-based fabrication of perovskite thin films for PSC applications, assisting in the perovskite crystallization. Several studies have shown that the incorporation of ILs in PSCs can increase stability, lifetime, and efficiency. Overall, the existing research indicates that ILs hold great promise as materials for improving the stability and performance of PSCs, which could have significant implications for the development of low-cost, renewable energy technologies.
{"title":"Addressing the Stability Challenge of Perovskite Solar Cells: The Potential of Ionic Liquid Incorporation for Improved Device Durability","authors":"Artur Farinha, Luís Santos, José Costa","doi":"10.24840/2183-6493_009-004_002162","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_002162","url":null,"abstract":"Perovskite solar cells (PSCs) have emerged as a promising technology for renewable energy generation due to their low cost and low carbon footprint compared to traditional silicon-based solar cells. However, some main challenges associated with PSCs lie ahead, namely their toxicity and lack of stability, particularly under factors such as light, temperature, oxygen, and humidity. We focus on the lack of stability of PSCs and the various ways it can be mitigated. We explore the use of vapor deposition methods, which can increase the crystallinity of the perovskite and thus improve stability and lifetime. Furthermore, we look into the potential of ionic liquids (ILs) as promising materials for improving the stability and performance of PSCs. ILs have advantageous physicochemical properties that make them suitable as an additive or interfacial layer in PSCs. They optimize the interface contact, improve energy level matching, suppress ion migration, and increase hydrophobicity, which inhibits the decomposition of the device in humid environments. ILs have also been used as precursors in the solution-based fabrication of perovskite thin films for PSC applications, assisting in the perovskite crystallization. Several studies have shown that the incorporation of ILs in PSCs can increase stability, lifetime, and efficiency. Overall, the existing research indicates that ILs hold great promise as materials for improving the stability and performance of PSCs, which could have significant implications for the development of low-cost, renewable energy technologies.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136061321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Power quality is the manifestation of a disruption in the supply voltage, current or frequency that damages the utility equipment and has become an important issue with the introduction of more sophisticated and sensitive devices. So, the supply power quality issue still remains a major challenge as its degradation can cause huge destabilization of electrical networks. As renewable energy sources have irregular nature, a microgrid essentially needs energy storage system containing advanced power electronic converters which is the root cause of majority of power quality disturbances. Also, the integration of non-linear and unbalanced loads into the grid adds to its power quality problems. This article gives a compact overview on the identification, categorization and mitigation of these power quality events in a microgrid by using various Artificial Intelligence-based techniques like Optimization techniques, Adaptive Learning techniques, Signal Processing and Pattern Recognition, Neural Networks and Fuzzy Logic.
{"title":"Brief Review on Identification, Categorization and Elimination of Power Quality Issues in a Microgrid Using Artificial Intelligent Techniques","authors":"Amrit Pattnaik, Prakash Kumar Hota, Meera Viswavandya","doi":"10.24840/2183-6493_009-004_001388","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_001388","url":null,"abstract":"Power quality is the manifestation of a disruption in the supply voltage, current or frequency that damages the utility equipment and has become an important issue with the introduction of more sophisticated and sensitive devices. So, the supply power quality issue still remains a major challenge as its degradation can cause huge destabilization of electrical networks. As renewable energy sources have irregular nature, a microgrid essentially needs energy storage system containing advanced power electronic converters which is the root cause of majority of power quality disturbances. Also, the integration of non-linear and unbalanced loads into the grid adds to its power quality problems. This article gives a compact overview on the identification, categorization and mitigation of these power quality events in a microgrid by using various Artificial Intelligence-based techniques like Optimization techniques, Adaptive Learning techniques, Signal Processing and Pattern Recognition, Neural Networks and Fuzzy Logic.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_002166
Stéphanie Oliveira Nina Rocha, Lino Maia
The demand for concrete production for civil construction promotes an investment by researchers and builders to find methodologies that improve their performance, the costs and less environmental degradation. Self-compacting concrete works it possible to offer a mixture with high flowability and compaction and good mechanical properties. For a better optimization of the mixtures, the statistical tool Design of Experiments (DoE) was used. Therefore, the objective of this research was to optimize an experimental dataset of high strength self-compacting mortars, through statistical analysis, using the Response Surface Methodology (RSM) for a Central Composite Design (CCD). The results showed a strong correlation between the D-Flow and T-funnel response factors, when compared with CS14h and CS28d models that showed moderate significance. The input variable w/c was the most significant model. Numerical optimization solutions showed good accuracy and high compliance for low cost and environmental impact, maintaining high performance in fresh and hardened properties.
{"title":"Optimization techniques for mortars with self-compacting characteristics through Central Composite Design","authors":"Stéphanie Oliveira Nina Rocha, Lino Maia","doi":"10.24840/2183-6493_009-004_002166","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_002166","url":null,"abstract":"The demand for concrete production for civil construction promotes an investment by researchers and builders to find methodologies that improve their performance, the costs and less environmental degradation. Self-compacting concrete works it possible to offer a mixture with high flowability and compaction and good mechanical properties. For a better optimization of the mixtures, the statistical tool Design of Experiments (DoE) was used. Therefore, the objective of this research was to optimize an experimental dataset of high strength self-compacting mortars, through statistical analysis, using the Response Surface Methodology (RSM) for a Central Composite Design (CCD). The results showed a strong correlation between the D-Flow and T-funnel response factors, when compared with CS14h and CS28d models that showed moderate significance. The input variable w/c was the most significant model. Numerical optimization solutions showed good accuracy and high compliance for low cost and environmental impact, maintaining high performance in fresh and hardened properties.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_002151
Albano Joaquim Gomes Martins, Ana Sá
The aim of the present study is the development of a model for the assessment of construction design solutions for outdoor public spaces, specifically for streets, squares, and parks, sustained by the analysis of the most important criteria in the urban space. Each of these criteria is divided into sub-criteria, that are very relevant in defining the rigour of the respective model, where materials and construction solutions play a very important role in the quality of a given outdoor public space and are decisive in obtaining a good classification. Through the approach of the assessment model, it is possible to define a matrix of relationships between the criteria and the sub-criteria of the analysis, allowing the perception of which sub-criteria have more influence in the assessment of the outdoor public space. The overall result of the assessment of a given outdoor public space is presented on a qualitative scale defined by quality levels, and improvements can be identified to move to a higher quality level.
{"title":"Characterisation of the outdoor public space: a model for assessment","authors":"Albano Joaquim Gomes Martins, Ana Sá","doi":"10.24840/2183-6493_009-004_002151","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_002151","url":null,"abstract":"The aim of the present study is the development of a model for the assessment of construction design solutions for outdoor public spaces, specifically for streets, squares, and parks, sustained by the analysis of the most important criteria in the urban space. Each of these criteria is divided into sub-criteria, that are very relevant in defining the rigour of the respective model, where materials and construction solutions play a very important role in the quality of a given outdoor public space and are decisive in obtaining a good classification. Through the approach of the assessment model, it is possible to define a matrix of relationships between the criteria and the sub-criteria of the analysis, allowing the perception of which sub-criteria have more influence in the assessment of the outdoor public space. The overall result of the assessment of a given outdoor public space is presented on a qualitative scale defined by quality levels, and improvements can be identified to move to a higher quality level.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136060336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_001955
Celso Pereira
The potential of VLP is increasing with the rise of indoor mobile machine applications. In this paper, a 3D indoor VLP system based on machine learning and optical camera communications is presented. The system uses electronically controlled LED luminaires as reference points and a rolling shutter CMOS sensor as the receiver. The LED luminaires are modulated using On-Off Keying with unique frequencies. YOLOv5 is used for classification and estimation of the position of each LED luminaire in the image. The pose of the receiver is estimated using a perspective-n-point algorithm. The system was validated using a real-world sized setup containing eight LED luminaires, and achieved an average positioning error of 3.5 cm. The average time to compute the camera pose is approximately 52 ms, which makes it suitable for real-time positioning. To the best of our knowledge, this is the first application of the YOLOv5 algorithm in the field of VLP for indoor environments.
{"title":"Optical Camera Communications and Machine Learning for Indoor Visible Light Positioning","authors":"Celso Pereira","doi":"10.24840/2183-6493_009-004_001955","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_001955","url":null,"abstract":"The potential of VLP is increasing with the rise of indoor mobile machine applications. In this paper, a 3D indoor VLP system based on machine learning and optical camera communications is presented. The system uses electronically controlled LED luminaires as reference points and a rolling shutter CMOS sensor as the receiver. The LED luminaires are modulated using On-Off Keying with unique frequencies. YOLOv5 is used for classification and estimation of the position of each LED luminaire in the image. The pose of the receiver is estimated using a perspective-n-point algorithm. The system was validated using a real-world sized setup containing eight LED luminaires, and achieved an average positioning error of 3.5 cm. The average time to compute the camera pose is approximately 52 ms, which makes it suitable for real-time positioning. To the best of our knowledge, this is the first application of the YOLOv5 algorithm in the field of VLP for indoor environments.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_001761
Avinash Navale, Chandresh Solanki, Vishwas Sawant
This work studies the response of a 2 x 2 pile group near a slope subjected to lateral load. Three-dimensional, non-linear finite element analysis is carried out. The entire code is developed in FORTRAN 90. Bending-dominated pile and pile caps are represented by 20 node elements with quadratic shape function, and shear-dominated soil elements are represented by eight-node elements with linear shape function. Sixteen node interface element of zero thickness is used for stress transfer between pile and soil. The outcome highlights the influence of slope parameters like slope angle and edge distance on the response of the 2 x 2 pile group near a slope. The lateral displacement and maximum bending moments are increased with an increase in slope. However, its effect reduces with an increase in slope distance. The point of zero-shear along the pile's depth shifts deeper with an increase in slope.
{"title":"Lateral Response of 2 x 2 Pile Group Embedded in Cohesive Soil Near Slope","authors":"Avinash Navale, Chandresh Solanki, Vishwas Sawant","doi":"10.24840/2183-6493_009-004_001761","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_001761","url":null,"abstract":"This work studies the response of a 2 x 2 pile group near a slope subjected to lateral load. Three-dimensional, non-linear finite element analysis is carried out. The entire code is developed in FORTRAN 90. Bending-dominated pile and pile caps are represented by 20 node elements with quadratic shape function, and shear-dominated soil elements are represented by eight-node elements with linear shape function. Sixteen node interface element of zero thickness is used for stress transfer between pile and soil. The outcome highlights the influence of slope parameters like slope angle and edge distance on the response of the 2 x 2 pile group near a slope. The lateral displacement and maximum bending moments are increased with an increase in slope. However, its effect reduces with an increase in slope distance. The point of zero-shear along the pile's depth shifts deeper with an increase in slope.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-22DOI: 10.24840/2183-6493_009-004_001625
Marta Campos Ferreira, António Ramos Silva, Ana Santos Camanho
The recognition of Covid-19 as a global pandemic in March 2020 forced the closure of schools and universities around the world, raising the need to adopt emergency teaching methods. A year and a half later, the situation is still not resolved, but there is more data that allow us to understand the real impact. This study presents a comprehensive analysis of higher education students perceptions about courses and faculty during the last 5 years (2016-2021), with a special focus on the differences in perception between the pre-Covid-19 and the during Covid-19 phases. To this end, the pedagogical surveys that are answered by students from an engineering degree at a Portuguese university at the end of the first and second semester of the academic year are analyzed. The results allow us to identify two distinct moments in the Covid-19 phase: a first in which feelings of positivism and appreciation of students for the instructors and the courses they teach stand out, and a second moment in which students become more demanding and dissatisfied with the courses and with the instructors, leading to a lack of motivation and involvement of students.
{"title":"Students' perceptions of higher education courses and instructors before and during Covid-19:","authors":"Marta Campos Ferreira, António Ramos Silva, Ana Santos Camanho","doi":"10.24840/2183-6493_009-004_001625","DOIUrl":"https://doi.org/10.24840/2183-6493_009-004_001625","url":null,"abstract":"The recognition of Covid-19 as a global pandemic in March 2020 forced the closure of schools and universities around the world, raising the need to adopt emergency teaching methods. A year and a half later, the situation is still not resolved, but there is more data that allow us to understand the real impact. This study presents a comprehensive analysis of higher education students perceptions about courses and faculty during the last 5 years (2016-2021), with a special focus on the differences in perception between the pre-Covid-19 and the during Covid-19 phases. To this end, the pedagogical surveys that are answered by students from an engineering degree at a Portuguese university at the end of the first and second semester of the academic year are analyzed. The results allow us to identify two distinct moments in the Covid-19 phase: a first in which feelings of positivism and appreciation of students for the instructors and the courses they teach stand out, and a second moment in which students become more demanding and dissatisfied with the courses and with the instructors, leading to a lack of motivation and involvement of students.","PeriodicalId":36339,"journal":{"name":"U.Porto Journal of Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136062175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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