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Crowdsourced repositories have become an increasingly important source of information for users and businesses in multiple domains. Everyday examples of tourism crowdsourcing platforms focusing on accommodation, food or travelling in general, influence consumer behaviour in modern societies. These repositories, due to their intrinsic openness, can strongly benefit from independent data quality modelling mechanisms. In this context, building trust & reputation models of contributors and storing crowdsourced data using distributed ledger technology allows not only to ascertain the quality of crowdsourced contributions, but also ensures the integrity of the built models. This paper presents a survey on distributed trust & reputation modelling using blockchain technology and, for the specific case of tourism crowdsourcing platforms, discusses the open research problems and identifies future lines of research. 2019 The Authors. Published by Elsevier B.V.

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This paper describes the journey of a multinational and multidisciplinary team enrolled in the European Project Semester (EPS) at the Instituto Superior de Engenharia do Porto (ISEP) during the spring semester of 2019. The team embraced the idea of repurposing coffee leftovers to cultivate oyster mushrooms and benefited from the background diversity of the team members as well as from newly acquired marketing, sustainability and design ethics skills to consolidate and strengthen the overall feasibility of the project. The project was set to design, develop and test grey oyster mushroom growth kits with an automated monitoring system, using coffee grounds as growing substrate and complying with the applicable regulations and pre-defined requirements. The ulterior aims of the project were to reconnect people with the food they eat and to disseminate sustainable food production processes, which are not only healthy but environmentally friendly. To achieve these goals, the team developed a circular economy business model where grey oyster mushroom growth kits reuse coffee grounds as growing beds and food buckets as containers. The designed growth kits include a controlled fruiting chamber with an integrated monitoring system. This allows easy domestic cultivation, monitoring through a smart phone. Moreover, the proposed solution contemplates information sharing on the mushroom cultivation process, monitoring system and recipes as well as the maintenance of a dedicated discussion forum. Tests have been conducted to test the concept, cultivation process, monitoring system and fruiting chamber from the incubation of mycelium all the way to the harvesting. Results show the feasibility of creating a business based on the devised concept. © 2019 ACM.

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This paper provides an overview of the development of a solar dehydrator, a project undertaken by a team of six Erasmus students from different countries during the European Project Semester at the Instituto Superior de Engenharia do Porto in the spring of 2019. The main objective of the European Project Semester is to develop teamwork, communication and problem-solving skills through team work and project-based learning. The purpose of the project was to design a sustainable solution to dehydrate and preserve food, build and test the corresponding proof-of-concept prototype, while respecting requirements such as the budget, the use of reusable materials and components or European Union directives. To achieve this goal, the team considered the technological, ethical and deontological, economic and environmental perspectives in the design of the Dryfoo prototype. This paper describes, after a short introduction, the performed research, the development and the testing of the proof-of-concept prototype, as well as the personal outcomes of this learning experience.

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The European Project Semester (EPS) project-based learning framework is a multicultural and multidisciplinary one semester engineering capstone programme provided by a network of European Higher Education institutions. Its aim is to prepare 3rd-year undergraduate students to their future professional life, enhancing hard and soft skills and following ethical and sustainable design and development practices. At the School of Engineering of Porto Polytechnic (ISEP) the focus of the EPS programme (EPS@ISEP) is on solving multidisciplinary problems through teamwork, involving engineering, design and business students [1]. The students work in teams of 5 to 6 students, assembled according to the identified Belbin team roles, and also maximizing student cultural and scientific diversity. On the first week each team chooses to solve one of the open-ended multidisciplinary problems on offer. Those projects involve typically some type of automation and control[2]. One of the obstacles these eclectic teams face is the lack of hardware/software skills required to design, assemble and test a microcontroller based systems. To help overcome this situation, the programme syllabus includes an 8-hour intensive "Arduino & Electronics Crash Course" at the beginning of the semester due to its market penetration, low-cost, availability of documentation and support, and soft learning curve. This course has effectively contributed to provide students with the necessary knowledge to design and implement simple control systems, leading to the adoption in multiple EPS@ISEP past projects of the Arduino platform/ecosystem. However, the crescent sophistication of the projects, namely the integration with Internet of Things (IoT) platforms, requires the definition of a new strategy, considering the available hardware/software alternatives. This paper analyses the experience of the EPS@ISEP students regarding the use of microcontroller based platforms in the development of engineering capstone projects, and proposes possible future hardware/software alternatives, both from the technical and pedagogical perspectives.

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