Browsing by Author "Sousa, Bruno"
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- E-GovSTP: An E-government model for a small island state, the case of São Tomé and PrincipePublication . Vaz, Daniel Neto; Sousa, Bruno; São Mamede, HenriqueThe multitude of e-government model raises questions as to their universal applicability. Indeed, literature posits that most data and research on e-government dominantly focuses on large economies where social, political, organizational, and economic aspects of these local contexts significantly differ from other parts of the world. Beyond, average developing economies, there is a group of countries specifically referred to as Small Islands Developing States (SIDS), as per the United Nation denomination, and these island states share common challenges of reduded size, diseconomies of scale, impact of climate changes and so on. Models guiding e-government implementation should be adapted to local context, and for SIDS this entails understanding their local context so as to formulate a model that is sustaible in the lng term. Even though we see studies for small economies, significant differences exists among SIDS that warrant individual approaches to each one of these island states. And an example of such a SIDS is the island state of Sao Tome and Principe, where recently the government is involved in technological initiatives, implementation of process simplification, harmonization and automation, and other e-government initiatives. This is visible at the Ministry of Finance where different interacting directorates have developed systems and software tools to management their business processes. These systems and tools are used for internal and external interaction with public and private sector, and were, however, developed in an environment lacking a centralized, interoperable vision or directives. Consequences are hight total cost of ownership, subsequent costs with interoperability and maintenance, and, in the end, deficient long-term sustainabiliyy Considering the impact of costs of information technology initiatives to the public budget, financed in its majority by development and bilateral assistance, it becomes a crucial need to set in place an e-government model to prescribe directives for a sound, interoperable and sustainable e- government implementation.
- Next generation of microservices for the 5G Service‐Based ArchitecturePublication . Moreira, João Bourbon; São Mamede, Henrique; Pereira, Vasco; Sousa, BrunoThe architecture for 5G core includes a Service-Based Architecture for the diverse network functions (NFs), which relies on HTTP/2 for the SBI and TCP as the underlying transport protocol. The specifications of the HTTP family is moving towards more efficient and secure protocols, which are based on UDP to assure enhanced transport but using TLS to secure the communication channel. The next generation of microservices needs to be more secure, per- formant and easily manageable, where HTTP/3 and containers orchestration platforms (like Kubernetes) can provide significative contributions towards such goals. Different deployment approaches can be followed for services implemented in compliance to the 5G SBA. This paper contributes with the assessment of deployment models for services in 5G networks, where NFs are implemented following traditional architectures (all the functions in a VM) or as serverless architectures (with functions distributed in containers). The per- formance of microservices in Kubernetes is also evaluated. The evaluation con- ducted also considers the employment of different versions of HTTPs to empower the service-based interfaces of 5G services. Results demonstrate per- formance benefits of employing HTTP/3, based on QUIC protocol, in scenarios with networks characterised by losses or delay conditions. Despite such gain, deployment in 5G networks needs to carefully consider aspects related with connection tracking mechanisms to support high volumes of requests.
- SiGeFA: Sistema de Gestão de Frequências de AlunosPublication . Evariste, Musekwa; Sousa, BrunoA monitorização de assiduidade dos alunos nas salas de aulas é um desafio que os professores e os pais e encarregados de educação enfrentam passivamente nas escolas secundárias moçambicanas. O presente artigo apresenta a implementação de um Sistema de Gestão de Frequências de Alunos (SiGeFA) composto por uma aplicação móvel, uma aplicação web e aplicação backend que visa monitorizar a assiduidade dos alunos por meio de marcação de faltas dos alunos ausentes e de envio automático de notificações aos pais e encarregados de educação cujos alunos estiverem ausentes durante as aulas. A avaliação do primeiro protótipo aponta para uma aceitação deste sistema por parte de professores e alunos.