Browsing by Author "Fernandes, Marta"
Now showing 1 - 10 of 11
Results Per Page
Sort Options
- Adaptation model for PCMAT – Mathematics collaborative learning platformPublication . Fernandes, Marta; Martins, Constantino; Faria, Luiz; Couto, Paulo; Valente, Cristiano; Bastos, Cristina; Costa, Fátima; Carrapatoso, EuricoThe aim of this paper is to present an adaptation model for an Adaptive Educational Hypermedia System, PCMAT. The adaptation of the application is based on progressive self-assessment (exercises, tasks, and so on) and applies the constructivist learning theory and the learning styles theory. Our objective is the creation of a better, more adequate adaptation model that takes into account the complexities of different users.
- Content adaptation for an adaptive hypermedia systemPublication . Fernandes, Marta; Couto, Paulo; Martins, Constantino; Faria, LuizThe aim of this paper is presenting the recommendation module of the Mathematics Collaborative Learning Platform (PCMAT). PCMAT is an Adaptive Educational Hypermedia System (AEHS), with a constructivist approach, which presents contents and activities adapted to the characteristics and learning style of students of mathematics in basic schools. The recommendation module is responsible for choosing different learning resources for the platform, based on the user's characteristics and performance. Since the main purpose of an adaptive system is to provide the user with content and interface adaptation, the recommendation module is integral to PCMAT’s adaptation model.
- Learning objects recommendation in an adaptive educational hypermedia systemPublication . Fernandes, Marta; Couto, Paulo; Martins, Constantino; Faria, Luiz; Bastos, Cristina; Costa, FátimaThe aim of this paper is presenting the modules of the Adaptive Educational Hypermedia System PCMAT, responsible for the recommendation of learning objects. PCMAT is an online collaborative learning platform with a constructivist approach, which assesses the user’s knowledge and presents contents and activities adapted to the characteristics and learning style of students of mathematics in basic schools. The recommendation module and search and retrieval module choose the most adequate learning object, based on the user's characteristics and performance, and in this way contribute to the system’s adaptability.
- Machine learning techniques applied to mechanical fault diagnosis and fault prognosis in the context of real industrial manufacturing use-cases: a systematic literature reviewPublication . Fernandes, Marta; Corchado, Juan Manuel; Marreiros, GoretiWhen put into practice in the real world, predictive maintenance presents a set of challenges for fault detection and prognosis that are often overlooked in studies validated with data from controlled experiments, or numeric simulations. For this reason, this study aims to review the recent advancements in mechanical fault diagnosis and fault prognosis in the manufacturing industry using machine learning methods. For this systematic review, we searched Web of Science, ACM Digital Library, Science Direct, Wiley Online Library, and IEEE Xplore between January 2015 and October 2021. Full-length studies that employed machine learning algorithms to perform mechanical fault detection or fault prognosis in manufacturing equipment and presented empirical results obtained from industrial case-studies were included, except for studies not written in English or published in sources other than peer-reviewed journals with JCR Impact Factor, conference proceedings and book chapters/sections. Of 4549 records, 44 primary studies were selected. In 37 of those studies, fault diagnosis and prognosis were performed using artificial neural networks (n=12), decision tree methods (n=11), hybrid models (n=8), or latent variable models (n=6), with one of the studies employing two different types of techniques independently. The remaining studies employed a variety of machine learning techniques, ranging from rule-based models to partition-based algorithms, and only two studies approached the problem using online learning methods. The main advantages of these algorithms include high performance, the ability to uncover complex nonlinear relationships and computational efficiency, while the most important limitation is the reduction in model performance in the presence of concept drift. This review shows that, although the number of studies performed in the manufacturing industry has been increasing in recent years, additional research is necessary to address the challenges presented by real-world scenarios.
- A modular graphic identity solution in rebranding an educational programmePublication . Faria, Carolina; Fernandes, MartaChallenge Based Innovation (CBI) is a university programme where student teams create innovative design projects in collaboration with CERN. Each university participating in CBI creates its version of the program. Thus, this is not a closed program, but open to different curricula, periods and student backgrounds. Despite the impact on the participants and potential of the program, it is not as internationally recognised as it could be. This paper presents results of an experimental project that rebrands and redesigns the graphic identity of CBI in order to increase its recognition, better communicate its goals and project outcomes. The process involved an understanding of the problem, provided by interviews with the main stakeholders, along with the identity development attained through brainstorming, sketching, experimental prototyping and iterating. The result aims to be a distinct modular brand, that represents the openness of the programme and its connection with technology and society.
- PCMAT Metadata Authoring ToolPublication . Couto, Paulo; Martins, Constantino; Faria, Luiz; Fernandes, Marta; Carrapatoso, EuricoThis paper introduces the PCMAT platform project and, in particular, one of its components, the PCMAT Metadata Authoring Tool. This is an educational web application that allows the project metadata creators to write the metadata associated to each learning object without any concern for the metadata schema semantics. Furthermore it permits the project managers to add or delete elements to the schema, without having to rewrite or compile any code.
- PCMAT, an adaptive learning platformPublication . Couto, Paulo; Fernandes, Marta; Martins, Constantino; Faria, LuizThis paper is about PCMAT, an adaptive learning platform for Mathematics in Basic Education schools. Based on a constructivist approach, PCMAT aims at verifying how techniques from adaptive hypermedia systems can improve e-learning based systems. To achieve this goal, PCMAT includes a Pedagogical Model that contains a set of adaptation rules that influence the student-platform interaction. PCMAT was subject to a preliminary testing with students aged between 12 and 14 years old on the subject of direct proportionality. The results from this preliminary test are quite promising as they seem to demonstrate the validity of our proposal.
- Trajetos de envolvimento: o design na concretização de espaços académicos e a sua ligação à malha localPublication . Fernandes, Marta; Coelho, RitaO design é a resposta a um problema contextualizado numa comunidade, com uma determinada história, cultura, geografia, época e tecido socio-económico. Os comportamentos dos seus habitantes formam uma rede complexa de que o design faz parte integrante e que deve ilustrar, tornando fluída a comunicação entre os vários intervenientes. No sentido humanista da palavra, comunicar tem na sua etimologia ‘pôr em comum’, ‘compartilhar’ – criar um elo de ligação entre as várias entidades. Num momento de criação de uma nova Escola Superior ligada às artes culturais, visuais, media e tecnologias, inserida num campus, apesar de tudo, com uma tradição académica instituída noutras áreas do saber, importa investigar as dinâmicas pedagógicas, culturais e industriais nestes novos campos científicos, adequadas e pertinentes para a população local, de modo a conseguir uma sustentabilidade do seu tecido industrial e humano. Este artigo aborda uma investigação em curso, por parte de duas docentes e uma estudante da Escola Superior de Media Artes e Design do Instituto Politécnico do Porto (ESMAD P.Porto), sobre uma pesquisa de identidade visual e etnográfica do contexto regional da ESMAD – localizada em Vila do Conde e Póvoa de Varzim – e sobre quais as apetências culturais das suas gentes. Ainda que pertencendo ao distrito do Porto, o Campus 2 do P.Porto, onde se insere a ESMAD, é uma comunidade descentralizada do grande centro da cidade portuense, sendo essencial compreender como a nova Escola se insere no seu contexto. Houve por isso, duas estratégias definidas. A criação de um evento catalisador – uma conferência de Design: Involve – que conectava o tema de identidade e embalagem, à indústria local e à academia. Por outro lado, o levantamento de testemunhos (obtidos através de entrevistas e de inquéritos) da sua comunidade geográfica e humana. Em suma, apresentam-se resultados que revelam os interesses, as atividades e os suportes de divulgação que identificam este território humano e geográfico e poderão potenciar a transferência de conhecimento.
- Visual archives and infographics: new connectionsPublication . Fernandes, Marta; Giesteira, Bruno; Quintas, Alexandre AiThe present article is part of a broader study that frames the concept and creation of visual archives for online press, in relation to in-‐ fographics. In addition to being an operative discipline, Design presents it-‐ self as a theoretical response, through the analysis of conditionings in soci-‐ ety and the anticipation of new communication processes. By presenting and promoting the practical and theoretical investigation in areas such as design and visual literacy, with specificity on infographics – a multidisciplinary area in constant evolution –, we intend to reveal how we can communicate complex information content visually. Focusing on online press infographics, we propose to establish a new role by relating it to visual archives. Nowadays, the Internet offers various resources for online archives and databases. In the interest of preserving content and data, various archives are, currently, committed to digitizing their information. Various govern-‐ ments, in a methodical manner, have made budget and government deci-‐ sions available online. Other examples, like Google, are also a vital source of information. However, correlations are dispersed and its logic is pre-‐ sented based on textual parities or presented in datasets that only make sense to a scarce number of people. Archives, as a specific field in information, should propose systemic con-‐ structions between content and meaning. This is the underlying premise, when we question in what measure can archives, by becoming visual, solve flaws in communication. At the same time, the subjacent objective of most information visualization is to organize and clarify mass volumes of data. Based on this definition, it is a field that has impinged it self in the concept of archive. We will begin explaining the connections that make information visualization fertile ground for this concept, by decoding the definition and objectives of archives. After, through authors and case studies, we will ana-‐ lyze how they can influence new platforms of communications and rein-‐ force new options for online press infographics.
- Visual archives in digital newspapers: an aproach to visual lexicon in an information visualization prototypePublication . Fernandes, Marta; Giesteira, BrunoBy rethinking how digital information and media have evolved, we intend to discuss how Information Visualization is performing an essential role in the field of newspapers, and how it can evolve with particular emphasis on content archiving for future access. The presence of new visual structures used in fields such as digital archiving, have questioned digital methods of preservation and how the interrelation between information and access to knowledge is revealed. In digital newspapers, the development of access and information retrieval processes has become an essential part of their duties, but it is still in it’s infancy and dependent on text search rather then content awareness. By outlining the links between Visual Archives and Information Visualization, with focus on online press, we venture in a path of trial and error. This is present by the recognition of lack of efficient articulation between different types of contents, as well as between the user interaction and the contents outcomes. Thus proposing a visual lexicon that can adjust to the constraints of technology, different user devices, and the promptitude of publication that a Web context demands it is utmost relevant. A combination of fields, with attention to visual perception and arbitrary conventions in relation to image and content awareness, grants the association of concepts such as big data and thick data description, being part of the outcomes of this research a proposal to a theoretical model grounded on prototyping testing in a newsroom office. This empirical methodological approach is supported by a low-fidelity prototype, for iterative formative evaluations, fostering field’s observations with potential users in order to identify the best visual components of a digital visual archive for online newspapers. The challenge is to develop visual structures that preserve and present the interconnections of news, information and knowledge to be seen, accessed and linked. By making use of a lo-fi prototype of a visual digital archive we aimed, to test, re-test, and find responses in dialogue, failure and retrial. The body of work shown here presents the practical outcomes of the theoretical model.