- ItemOpen AccessAre voice assistants suitable learning companions for generation-Z students of computer science in the classroom? A Pilot Study(CIDUI, 2021) Sayago Barrantes, SergioHow do voice assistants such as Apple Siri play the role of learning companions of Generation-Z students of Computer Science (CS) in the classroom? This paper is an exploratory pilot study, based on participant observation, of (N=18) students’ experiences of using Apple Siri and Google Assistant in two mandatory CS courses over a semester. This paper shows that neither Siri nor Assistant were good enough learning companions for the students, who expected Siri and Assistant to behave like competent, human tutors. Yet, neither tool met their expectations.
- ItemOpen AccessIntroducing Teacher of the Day in the Databases Course of the New Degree on Digital and Computing Interaction Techniques at Universitat de Lleida(CIDUI, 2021) Sayago Barrantes, SergioThis paper discusses the lessons learned from introducing teacher of the day, a variant of peer tutoring, in an undergraduate course of the new Degree of Digital and Computing Interaction Techniques at Universitat de Lleida. Teacher of the day fostered a learning environment wherein students engaged in active learning over a semester, playing new roles for them (peer teaching and assessment). Students rated the activity as excellent and reported learning about academic and non-academic aspects.
- ItemOpen AccessLessons Learned From Developing an Integrated and Entrepreneur Project For Enhancing Software Engineering Skills: A Case Study(CIDUI, 2023) Sayago Barrantes, Sergio; Mateo Fornés, JordiThis paper presents a case study that brings together entrepreneurship and project based learning in Software Engineering education. Over 3 academic years, we conducted an integrated, project-based software development assignment in the Digital Interaction and Computing Techniques Degree at the University of Lleida. The results show that the project helped the students to enhance their organization, communication and coding skills. The task also encouraged the lecturers to reflect on, and improve, their coordination and motivational skills.
- ItemEmbargoOptimizing the discharge process of a seasonal sorption storage system by means of design and control approach(Elsevier, 2023) Crespo, Alicia; Frazzica, Andrea; Fernàndez Camon, César; Gracia Cuesta, Alvaro deSorption thermal energy storage systems have higher energy densities and low long-term thermal losses compared to traditional energy storage technologies, which makes them very attractive for seasonal heat storage application. Although they have a lot of potential at material level, its operation and system implementation for residential application requires further study. The performance of a seasonal sorption thermal energy storage system strongly depends on the discharging process during the cold season. The present study analysed through numerical simulations different scenarios to enhance the thermal performance of a solar-driven seasonal water-based sorption storage, which supplied space heating and domestic hot water to a single-family house in a cold climate region. All studied scenarios were analysed under optimal control policy. The results indicated that the sorption storage could increase by 9 % its energy density if conservative and constant discharging temperature set points are considered, due to fewer interruptions during the discharge. The energy density of the sorption storage driven by solar energy was highly impacted by the weather conditions, and by the type and availability of low-temperature heat source. Indeed, the energy density of the sorption storage increased by 22 % using a water tank to assist the evaporator of the sorption storage, instead of a latent storage tank. The use of a dry-heater to assist the evaporator with environmental heat was not suitable for the climate studied due to the low hours of operation. The sorption storage system composed of 20 modules of LiCl-silica gel could obtain an energy density and a COP of 139 kWh/m3 and 0.39, respectively, if a constant low-temperature heat source (i.e, geothermal or waste energy) was available.
- ItemOpen AccessSemantics and Non-Fungible Tokens for Copyright Management on the Metaverse and Beyond(Association for Computing Machinery (ACM), 2023) García González, Roberto; Cediel, Ana; Teixidó Cairol, Mercè; Gil Iranzo, Rosa MaríaRecent initiatives related to the Metaverse focus on better visualisation, like augmented or virtual reality, but also persistent digital objects. To guarantee real ownership of these digital objects, open systems based on public blockchains and Non-Fungible Tokens (NFTs) are emerging together with a nascent decentralized and open creator economy. To manage this emerging economy in a more organised way, and fight the so common NFT plagiarism, we propose CopyrightLY, a decentralized application for authorship and copyright management. It provides means to claim content authorship, including supporting evidence. Content and metadata are stored in decentralized storage and registered on the blockchain. A token is used to curate these claims, and potential complaints, by staking it on them. Staking is incentivized by the fact that the token is minted using a bonding curve. The tokenomics include the resolution of complaints and enabling the monetization of curated claims. Monetization is achieved through licensing NFTs with metadata enhanced by semantic technologies. Semantic data makes explicit the reuse conditions transferred with the token while keeping the connection to the underlying copyright claims to improve the trustability of the NFTs. Moreover, the semantic metadata is flexible enough to enable licensing not just in the real world. Licenses can refer to reuses in specific locations in a metaverse, thus facilitating the emergence of creative economies in them.