http://hdl.handle.net/10174/201 Tue, 07 Apr 2026 19:35:47 GMT 2026-04-07T19:35:47Z http://hdl.handle.net/10174/41329 Title: A Blockchain Approach to IoT Sensor Data Storage Using Hyperledger Fabric Authors: Solipa, Diogo; Saias, Jóse; Salgueiro, Pedro Abstract: The integration of IoT and blockchain technologies presents a compelling opportunity to address longstanding challenges related to data integrity, trust, and decentralization in distributed systems. blockchain is a specific implementation of distributed ledger technologies (DLTs), known for its security, trust, and decentralization. IoT, on the other hand, has become increasingly relevant, generating vast amounts of data and requiring high uptime for connected devices, which are susceptible to data tampering, privacy breaches, and single points of failure. This paper explores the integration of blockchain with an IoT network. Particular emphasis is placed on Hyperledger Fabric, a permissioned blockchain framework tailored for enterprise-grade applications. Through a combination of architectural analysis and empirical testing, this work evaluates multiple Hyperledger Fabric configurations and performance metrics such as response time, throughput, latency, scalability. The experimental component leverages benchmarking tools, such as Hy- perledger Caliper. These tests aim to quantify trade-offs between query flexibility and system performance under varying configurations and work- loads. The findings support the viability of using tailored blockchain con- figurations for scalable and secure IoT deployments, while highlighting areas for further optimization and future work. Sun, 31 Aug 2025 23:00:00 GMT http://hdl.handle.net/10174/41329 2025-08-31T23:00:00Z http://hdl.handle.net/10174/41324 Title: Web-based platform providing ongoing rehabilitation support for stroke victims Authors: Duarte, Yanne; Saias, Jóse Abstract: The aim of this work is the development of a digital platform to support the physical rehabilitation of stroke patients who were cleared to transition to home-based and outpatient rehabilitation. This digital solution facilitates real-time communication with physiother- apists, disseminates stroke educational content to boost patient health literacy, and complements rehabilitation protocols through guided exer- cise videos and session monitoring (including repetition counts, schedul- ing, and time tracking). The development consisted of a Progressive Web Application (PWA), a hybrid solution functioning as both a web browser application and a na- tive app. Its layered architecture isolates UI components from backend operations. By combining modern and robust technologies, we created an accessible and secure application capable of real-time communica- tion between users and physiotherapists. This streamlines rehabilitation activity tracking and enhances patient well-being. In-situ evaluation is scheduled for the subsequent project phase, to be carried out through partnerships with healthcare providers. Thu, 04 Sep 2025 23:00:00 GMT http://hdl.handle.net/10174/41324 2025-09-04T23:00:00Z http://hdl.handle.net/10174/41320 Title: A web based application for the collection and normative analysis of neuropsychological test data Authors: Mestre, Diogo; Salgueiro, Pedro; Gonçalves, Teresa; Boyatt, Jessica Abstract: Accurate analysis and interpretation of neuropsychological test scores are critical for clinical practice and research. However, the complexity and variability of these tests often make it difficult to collect consistent data and perform meaningful normative comparisons, partic- ularly with culturally diverse populations. This work introduces a web- based application, currently under development, for collecting, storing, and analyzing neuropsychological test scores from diverse studies. The application allows the user to upload data from a study, conduct searches, and perform normative comparisons based on all submitted samples. For normative comparisons, the application classifies a patient’s test scores against existing values in the database, allowing users to evaluate subject data against normative values and determine if they lie within typical ranges. A central aspect to the development is the database system, which requires a dynamic and scalable structure to accommodate a wide range of tests and parameters. This article also outlines the key design considerations for the database and addresses the challenges of structur- ing neuropsychological data for both flexibility and analytical accuracy. The web application aims to simplify the data management while offeri Sun, 31 Aug 2025 23:00:00 GMT http://hdl.handle.net/10174/41320 2025-08-31T23:00:00Z http://hdl.handle.net/10174/41294 Title: Evaluation of manual coordination and visuospatial attention using the adapted Fitts test in students with dyslexia in higher education Authors: Fernandes, Orlando; Saias, José; Santos, Graça; Ferreira, Mariana; Almeida, Gabriela Abstract: Background: Difficulty in literacy acquisition skills is just one of the symptoms of specific learning disorder (SLD). Children with this disorder demonstrate disturbances in motor coordination. Children, adolescents, and adults with SLD with a deficit in reading (dyslexia), exhibit difficulties performing various manual tasks that require motor skills and precision in timing and control of serial tasks. Fitts' law demonstrated that the average time it takes a performer to hit two targets using the computer mouse increases as the ratio of movement distance to target width increases known also as the inverse speed-precision relationship paradigm. Objective: We thus propose an adapted test keeping target width and distance to target constant to control two key variables in assessing speed-precision. Methods: Twelve subjects, six with dyslexia and six without dyslexia were evaluated using the adapted Fitts test. Each student was asked, to mobilize a mouse and click on a random target displayed on the screen. After clicking on the random target, they would click on the central target as quickly and accurately as they could. This procedure was repeated for five minutes. Results: The group of students with showed higher sample entropy values reflecting less regularity in behavior and a lower performance index in both the horizontal and vertical components of mouse movements. Conclusions: The adapted Fitt's test allowed: a) to differentiate visuospatial attention in college students without and with SLD; b) to quantify the time/number (speed) of clicks during the test; c) to evaluate visuomotor control as well as visual perception, due to the difficulties presented in visualizing close targets that have to be regulated through effective fine motor skills. Sun, 01 Jan 2023 00:00:00 GMT http://hdl.handle.net/10174/41294 2023-01-01T00:00:00Z