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Scientific Repository of the Porto Polytechnic

 

The Scientific Repository of the Polytechnic Institute of Porto's main goal is to provide all the scientific production of teachers, researchers and students of the Polytechnic Institute of Porto when possible in full text.The mission of the Scientific Repository of the Polytechnic Institute of Porto comprises up between two factors of extreme importance, the availability of scientific information and the preservation of digital information."Key Market": to make available in free access all the scientific production of the Polytechnic Institute of Porto."Contribution": aid students, researchers, teachers and the general public in obtaining reliable scientific production."Distinction": commitment that each user meets their scientific needs.

Recent Submissions

Edgar Torrão - Curriculum Vitae
Publication . Torrão, Edgar Alberto Marques
Prova para obtenção do título de especialista em Contabilidade - cód. CNAEF 344 - Contabilidade e Fiscalidade
Curriculum Vitae Daniel Lopes (Europass)
Publication . Lopes, Daniel Filipe Moreira
Prova para obtenção do título de especialista em Contabilidade - cód. 344 - Contabilidade e Fiscalidade
DIMENSIONS OF A MATURITY MODEL FOR INFORMATION SYSTEMS IN HIGHER EDUCATION INSTITUTIONS
Publication . Rui Humberto Pereira; Pereira, Rui Humberto; João Vidal de Carvalho; Vidal de Carvalho, Joao; Álvaro Rocha
The complexity of the information systems (IS) in the higher education institutions (HEI) has been continuously increasing during the last decades. Thus, managers need tools to evaluate the maturity of their IS, in order to continuously improve them. Additionally, the accreditation processes and rankings may also include organisational aspects in their criteria, in which the maturity models may be a useful tool. However, the existing literature is scarce on validated maturity models focused on the comprehensive management of complex HEI information systems. In previous papers, we came to the conclusion of the need and opportunity to propose a new maturity model to evaluate the IS of HEI, as well as the methodology to follow in the development of such model. In the present paper, we discuss our proposal for the architecture of the new model, synthetizing the state of the model that we intend to develop. This proposal is based on a two-dimensional approach, composed by vertical and horizontal dimensions of information. We believe that our approach, can mitigate the implications of the complexly issues of HEI on the maturity model to be developed. This proposal it the result of a multicase study, in which we identified the dimensions to consider in the model. In the further steps of our work, we will validate each of one of these dimensions and define the set of characteristics for each stage of maturity. Keywords: Stages of Growth, Maturity Models, Higher Education Institutions, Education Information Systems, Management.
User Reputation on E-Commerce: Blockchain-Based Approaches
Publication . Maria José Angélico Gonçalves; Rui Humberto Pereira; Marta Alexandra Guerra Magalhães Coelho; Angélico Gonçalves, Maria José; Pereira, Rui Humberto
User trust is a fundamental issue in e-commerce. To address this problem, recommendation systems have been widely used in different application domains including social media healthcare, e-commerce, and others. In this paper, we present a systematic review of the literature in the area of blockchain-based reputation models and we discuss the obtained results, answering the initial research questions. These findings lead us to conclude that the existing systems are based on a trusted third party (TTP) to collect and store reputation data, which does not provide transparency on users’ reputation scores. In the recent literature, on the one hand, blockchain-based reputation systems have been highlighted as possible solutions to effectively provide the necessary transparency, as well as effective identity management. On the other hand, new challenges are posed in terms of user privacy and performance, due to the specific characteristics of the blockchain. According to the literature, two major approaches have been proposed based on public and permissioned blockchains. Each approach applies adjusted models for calculating reputation scores. Despite the undoubted advantages added by a blockchain, the problem is only partially solved since there is no effective way to prevent blockchain oracles from feeding the chain with false, unfair, or biased data. In our future work, we intend to explore the two approaches discussed in the literature in order to propose a new blockchain-based model for deriving user reputation scores.
A systematic literature review on maturity models for information systems in higher education institutions
Publication . João Vidal de Carvalho; Vidal de Carvalho, Joao; Pereira, Rui Humberto; Álvaro Rocha
Maturity models have been introduced over the last five decades as guides and references for information system (IS) management in organizations from different sectors. In the education sector, maturity models have also been used to evaluate higher education institutions (HEIs) across several dimensions, such as information and communication technology (ICT), management, process management, course curricula, course/HEI accreditation, e-/m-learning, online courses and pedagogical strategies. In fact, HEIs are faced with enormous complexity due to the specificity and quantity of their processes. Based on the guidelines concerning a methodology for a systematic literature review, the maturity models of different subareas of education are identified and categorized in this paper. For each maturity model associated with HEIs’ ISs, the appropriate methodology for development and validation is identified, as well as the scope, stages and their dimensional characteristics. This study highlights the need to develop an IS maturity model that supports HEIs in their core business activities and management.