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- Research priorities in immersive learning technology: the perspectives of the iLRN communityPublication . Gaspar, Horácio; Morgado, Leonel; São Mamede, Henrique; Oliveira, Teresa; Fernandez-Manjon, Baltasar; Gütl, ChristianThis paper presents the perspectives of the immersive learning research network community on the relevance of various challenges to the adoption of immersive learning technology, along three dimensions: access, content production, and deployment. Using a previously validated questionnaire, we surveyed this community of 622 researchers and practitioners during the summer of 2018, attaining 54 responses. By ranking the challenges individually and within each dimension, the results point towards higher relevance being placed on aspects that link immersive environments with learning management systems and pedagogical tasks, alongside aspects that empower non-technical users (educational actors) to produce interactive stories, objects, and characters.
- Introdução aos Sistemas Integrados de Gestão de Bibliotecas: como avaliar Integrated Library Systems?Publication . São Mamede, HenriqueA tarefa de avaliar ILS é necessária para que se possa escolher o sistema de gestão da biblioteca mais apropriado, ou seja, que melhor responde às necessidades da biblioteca no que concerne à automatização das suas operações.
- A smart city’s model secured by blockchainPublication . Brandão, António; São Mamede, Henrique; Gonçalves, Ramiro Manuel Ramos MoreiraThe topic of Smart Cities involves various aspects of convergence and support to necessarily safe activities, which are dependent on reliable data and reliable sources. The answer could be provided by means of the adoption model of Blockchain technologies for this purpose, applied to the different characteristics of the city from the electronic governance, the contracting of products and services, and the sensing or data collection. The multiple IoT objects and the multiple networks, together with the Blockchain technology, may result in safer and more efficient cities. This paper analyzes and deepens the concept of Smart Cities using Blockchain technology as a platform for safety and reliability of the data. It is intended to reflect critically on this topic, looking through the different aspects involving this concept and the way in which it can implement. It analyzes the Smart Cities and its ecosystems with the generic data models, integrated, with quality data and trusted information.
- A methodology for electronic business initiatives implementation in SMEPublication . São Mamede, Henrique; Amaral, LuísThe World Wide Web technology, supported on Internet, is transforming all business activities into information-based activities. As a result, one can see a radical change in the traditional theoretical models and organisation. The small and medium enterprises (SME) are the type of enterprises that can reap more advantages with the usage of Internet for electronic business. We found that current methodologies present gaps which make them inadequate and unable to help the small and medium enterprises define an effective strategy and follow an plausible implementation path. This being so, we propose a methodology to support the complete implementation lifecycle of electronic business in small and medium enterprises.
- Planeamento de sistemas de informação: motivação, problemas e estratégiasPublication . São Mamede, HenriqueDescrição das motivações organizacionais para o Planeamento de Sistemas de Informação, bem como dos problemas e barreiras à sua concretização e das estratégias para uma realização com sucesso.
- Combining low-code development with ChatGPT to novel no-code approaches: a focus-group studyPublication . Martins, José; Branco, Frederico; São Mamede, HenriqueLow-code tools are a trend in software development for business solutions due to their agility and ease of use. There are a certain number of vendors with such solutions. Still, in most Western countries, there is a clear need for the existence of greater quantities of certified and experienced professionals to work with those tools. This means that companies with more resources can attract and maintain those professionals, whilst other smaller organizations must rely on an endless search for this scarce resource. We will present and validate a model designed to transform ChatGPT into a low-code developer, addressing the demand for a more skilled human resource solution. This innovative tool underwent rigorous validation via a focus group study, engaging a panel of highly experienced experts. Their invaluable insights and feedback on the proposed model were systematically gathered and meticulously analysed.
- Sistemas em Rede: controlo de acesso ao meio (MAC)Publication . São Mamede, HenriqueElementos sobre o nível de controlo de acesso ao meio físico do modelo OSI.
- 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.
- A survey on association rule mining for enterprise architecture model discoveryPublication . Pinheiro, Carlos; Guerreiro, Sérgio; São Mamede, HenriqueAssociation Rule Mining (ARM) is a field of data mining (DM) that attempts to identify correlations among database items. It has been applied in various domains to discover patterns, provide insight into different topics, and build understandable, descriptive, and predic- tive models. On the one hand, Enterprise Architecture (EA) is a coherent set of principles, methods, and models suit- able for designing organizational structures. It uses view- points derived from EA models to express different concerns about a company and its IT landscape, such as organizational hierarchies, processes, services, applica- tions, and data. EA mining is the use of DM techniques to obtain EA models. This paper presents a literature review to identify the newest and most cited ARM algorithms and techniques suitable for EA mining that focus on automating the creation of EA models from existent data in application systems and services. It systematically identifies and maps fourteen candidate algorithms into four categories useful for EA mining: (i) General Frequent Pattern Mining, (ii) High Utility Pattern Mining, (iii) Parallel Pattern Mining, and (iv) Distribute Pattern Mining. Based on that, it dis- cusses some possibilities and presents an exemplification with a prototype hypothesizing an ARM application for EA mining.
- Transforming physical enterprise into a remote organization: transformation impact: digital tools, processes and peoplePublication . Saraiva, Celia; São Mamede, Henrique; Silveira, Maria Clara; Nunes, MarcoThis paper aims to define a problem to be studied and summarize previous research work done. Remote work or telework enterprise model has been a growing trend. The Covid-19 pandemic forced businesses to adopt a temporary remote-working mode. Now managers are investigating whether this “new” working-mode is, or not, a better approach than the traditional working mode known as the “office model”. The proposed framework will support the transformation process from a physical into a remote work model supported by applying digital tools and methods. Furthermore, the framework proposed in this work aims to help business decision makers to decide which organizational model they should adopt after Covid-19: full-remote; “hybrid” or partially remote; or physical, also known as “going back to the office”. A simple and pragmatic framework is proposed to help organizations: understand if it’s possible to transform a business from a physical (“at the office”) to a full or partial remote model; define the main goals of this transformation; create a simple template to map the new digital enterprise architecture in terms of tools, data management, business processes and human resources (job functions and digital skills).