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Publications

Publications by António Manuel Amaral

2025

Academic Mobility as a Service (AMaaS) Cybersecurity Challenges

Authors
Barreto, L; Amaral, A; Pereira, T; Baltazar, S;

Publication
Lecture Notes in Intelligent Transportation and Infrastructure

Abstract
The current era where living demands an accelerated digital transition mainly focused on encouraging a smarter, healthier, and more sustainable mobility, in all its dimensions – a must concern for the young generations. The convergence through several digital services and APP can be an attitudes and perception changer within the group of academic mobility users’, promoting a more sustainable and better mobility choices that impact on the academic user’s mobility routines. Thus, encouraging a global shift to shared and active mobility services and systems bringing significant contributions to environmental sustainability and, also, to users’ health. The Academic Mobility as a Service (AMaaS) provide a digital service with mobility alternatives to support the academic population geographically located in different faculty campuses and Higher Education Institutions (HEI). The AMaaS applied to a restrict group is helpful to test innovative transport solutions and its high cybersecurity vulnerabilities. Despite the shortage of AMaaS case studies and the lack of security reference, it is imperative that a cybersecurity by design is planned and included in AMaaS design. In this paper AMaaS critical cybersecurity challenges, and potential risks are discussed and AMaaS Security by Design framework is described. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

2020

Implications of Mobility as a Service (MaaS) in Urban and Rural Environments

Authors
Amaral, AM; Barreto, L; Baltazar, S; Silva, JP; Gonçalves, L;

Publication
Practice, Progress, and Proficiency in Sustainability

Abstract

2026

Machine Learning-Based Cost Estimation Approach for Furniture Manufacturing

Authors
Pereira, MTR; e Oliveira, EDM; Amaral, AM; Pereira, G;

Publication
IFIP Advances in Information and Communication Technology

Abstract
This project was developed to improve the cost estimation process of new products within the Product Development Department of a furniture manufacturer. This work involved developing a methodology using Machine Learning (ML) models trained on products’ existing data to predict the cost of new innovative ones based on similarities and given data. The ML models used were Linear Regression (LR), Light Gradient-Boosting Machine (LGBM), Random Forest (RF), and Support Vector Machine (SVM). The proposed methodology considers the estimation of the total cost of producing a product, which encompasses both material and operational costs. Throughout this project, several analyses were developed to identify and evaluate different independent variables that could explain the behaviour of these two cost components. The suitability of the different variables was studied by applying several ML models, and a set of functions that return an estimate of the cost as a function of these predictor variables was obtained. The proposed approach, which incorporates ML models into more complex variables to predict, resulted in a 19.29% reduction in estimation error. © 2025 Elsevier B.V., All rights reserved.

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