Goreti Marreiros

Goreti Marreiros
Polytechnic Institute of Porto | IPP · GECAD - Grupo de Investigação em Engenharia do Conhecimento e Apoio à Decisão

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177
Publications
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Publications

Publications (177)
Article
This paper presents LSHAD, an anomaly detection (AD) method based on Locality Sensitive Hashing (LSH), capable of dealing with large-scale datasets. The resulting algorithm is highly parallelizable and its implementation in Apache Spark further increases its ability to handle very large datasets. Moreover, the algorithm incorporates an automatic hy...
Article
Full-text available
With the modernization of industry and introduction of IoT, maintenance practices have been moving from reactive to proactive and predictive approaches. The identification of faults often relies on the analysis of real-time data provided by streams and unstructured sources. Ontologies have been applied to the maintenance field in order to add a sem...
Conference Paper
El presente artículo recoge las diferentes implicaciones que tienen los incentivos económicos externos en determinadas regiones frontera y periféricas. En el estudio se detallan casos de éxito en el que la inversión por parte de la UE ha sido clave para el desarrollo de la economía en esas zonas. Los resultados de este estudio conducen a concluir q...
Conference Paper
Nowadays, the Industrial Internet promises to transform our world. The melding of the global industrial system that was made possible because of the Industrial Revolution, with the open computing and communication systems developed as part of the Internet Revolution, opens new frontiers to accelerate productivity, reduce inefficiency and waste, and...
Conference Paper
In industrial manufacturing environments, a regular maintenance is crucial to ensure the production efficiency, since the occurrence of unexpected disturbances leads to a degradation of the system performance, causing the loss of productivity and business opportunities. In this context, the purpose of predictive maintenance has been receiving incre...
Conference Paper
The need for adaptation led the industry to evolve into a new revolution, where connectivity, amount of data, new devices, stock reduction, personalization and production control gave rise to Industry 4.0. Predictive maintenance is based on historical data, models and knowledge of the domain in order to predict trends, patterns of behavior and corr...
Article
Full-text available
When 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 progn...
Article
Full-text available
Argumentation-based dialogue models have shown to be appropriate for decision contexts in which it is intended to overcome the lack of interaction between decision-makers, either because they are dispersed, they are too many, or they are simply not even known. However, to support decision processes with argumentation-based dialogue models, it is ne...
Article
Full-text available
The world ageing problem is prompting new sustainable ways to support elderly people. As such, it is important to promote personalized and intelligent ways to assure the active and healthy ageing of the population. Technological breakthroughs have led to the development of personalized healthcare systems, capable of monitoring and providing feedbac...
Chapter
Predictive maintenance approaches result in shorter interventions, less downtime and less maintenance and production costs, leading to more sustainable manufacturing and increasing earnings. Machine learning and data mining approaches are now popular in this field, producing data-driven models that can provide insights regarding equipment behavior,...
Chapter
The prevention of diseases considered a scourge of our society, as for example mental illness, particularly anxiety disorders and depressive states, is a primary and urgent goal today and a priority axis of the EU. Mental illness includes many clinical conditions associated with several changes that include limitations related with social interacti...
Chapter
Agent-based simulation tools have found many applications in the field of Power and Energy Systems, as they can model and analyze the complex synergies of dynamic and continuously evolving systems. While some studies have been done w.r.t. simulation and decision support for electricity markets and smart grids, there is still a generalized limitatio...
Chapter
The demand and interest for personalized, efficient, and inexpensive healthcare solutions has significantly increased over the last decade to overcome the major limitations of existing traditional healthcare approaches. This new trend relies on the definition of intelligent mechanisms that can persuade the end-user to achieve health-related outcome...
Article
Full-text available
Yearly population growth will lead to a significant increase in agricultural production in the coming years. Twenty-first century agricultural producers will be facing the challenge of achieving food security and efficiency. This must be achieved while ensuring sustainable agricultural systems and overcoming the problems posed by climate change, de...
Chapter
Predictive maintenance often relies on the continuous monitorization of equipment behavior, generally provided by sensors or by the very equipment. Additional data from management software, including which materials are being used and what processes are executed on the equipment can be used to enrich the data streams and ontologies can be used to b...
Article
System analyses deal with interrelationships between different variables that keep the system in balance. In many analysis of complex thinking, a system is viewed as a complex unit in which the ‘whole’ is not reduced to the ‘sum’ of its parts; the system becomes an ambiguous item because it consists of several entities that interact with unforeseen...
Article
Full-text available
Over the last decades, an increase in the ageing population and age-related diseases has been observed, with the increase in healthcare costs. As so, new solutions to provide more efficient and affordable support to this group of patients are needed. Such solutions should never discard the user and instead should focus on promoting more healthy lif...
Chapter
Information technologies are intrinsically connected to the manufacturing processes, with more data generated each second. To efficiently operate machines, users must sort out information that is relevant to them in specific moments and contexts. In this paper, we propose an architecture that combines context – e.g. location, type of order, availab...
Chapter
Group decision making is an area that has been studied over the years. Group Decision Support Systems emerged with the aim of supporting decision makers in group decision-making processes. In order to properly support decision-makers these days, it is essential that GDSS provide mechanisms to properly support decision-makers. The application of Mac...
Chapter
The digital age is upon us and challenges many of today’s businesses. To succeed with digitalization, it is needed a well-integrated enterprise and Information Technology organization that works seamlessly and thrives towards common goals. This is easy to say, but harder to achieve. Digital Transformation is the integration of digital technology in...
Conference Paper
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Critical infrastructures, like airports and hospitals, provide essential services and are considered huge investments in any country. Ensuring the security of these critical infrastructures is a necessity in every possible aspect. These infrastructures, however, currently make use of different technological solutions with distinct security levels,...
Article
Full-text available
Cyber security is a critical area in computer systems especially when dealing with sensitive data. At present, it is becoming increasingly important to assure that computer systems are secured from attacks due to modern society dependence from those systems. To prevent these attacks, nowadays most organizations make use of anomaly-based intrusion d...
Article
Full-text available
The proportion of the world’s population growing older is rapidly increasing over the last decades. With the recent progresses seen in information and communication technologies, there have been great concerns about developing personalized healthcare services that can ensure the living conditions and active aging of the elderly people. Among these...
Article
Transformative computing in the fourth-generation industrialization, receives all signals and all sequences from sensing devices under artificial intelligence in wireless networking. Then the system has to combine them and make a useful information for human. In an industrial building or in a home, many electronic devices would be using and they ma...
Chapter
This work has as its main goal the investigation and experimentation on automatic generation of routes for tourists and visitors of points of interest, considering the knowledge of the routes, the profile of the visitor and the context awareness of the tour. The context of a trip can be taken through various sources of information, such as the loca...
Article
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To support Group Decision-Making processes when participants are dispersed is a complex task. The biggest challenges are related to communication limitations that impede decision-makers to take advantage of the benefits associated with face-to-face Group Decision-Making processes. Several approaches that intend to aid dispersed groups attaining dec...
Chapter
With such a noticeable increase in the number of people with chronic obstructive respiratory diseases the effectiveness of traditional healthcare systems has worsened significantly over the last years. There is an opportunity to develop low cost and personalized solutions that can empower patients to self-manage and self-monitor their health condit...
Article
Full-text available
We are living a change of paradigm regarding decision-making. On the one hand, there is a growing need to make decisions in group at both professional and personal levels, on the other hand, it is increasingly difficult for decision-makers to meet at the same place and at the same time. The Web-based Group Decision Support Systems intend to overcom...
Chapter
The industrial world is amid a revolution, titled Industry 4.0, which entails the use of IoT technologies to enable the exchange of information between sensors, industrial machines and end users. A major issue in many industrial sectors is production inefficiency, with process downtime representing a loss for companies. Predictive maintenance, wher...
Chapter
Full-text available
We are living a change of paradigm regarding decision-making. On the one hand, there is a growing need to make decisions in group at both professional and personal levels, on the other hand, it is increasingly difficult for decision-makers to meet at the same place and at the same time. The Web-based Group Decision Support Systems intend to overcom...
Technical Report
Full-text available
The motivation for this article arises from the security, complexity and interoperability challenges in cyber-physical systems (CPS) especially in energy and mobility domains. Handling peak consumption hours and balancing power levels in the energy grids are becoming more and more expensive for the energy sector, energy intensive industry and consu...
Chapter
Over the last decades web and mobile technologies are increasingly being used in sports, especially in soccer, but none of them seems to allow to prevent injuries. However, training systems for young athletes do not have, for the most part, learning abilities in order to adapt, evolve and find new training recommendations. It is in this context whi...
Chapter
Full-text available
Agent-based technologies are often used including existing web services. The outputs of some services are also frequently used as inputs for other services, including other MAS. However, while agent-based technologies can be used to provide services, these are not described using the same semantic web technologies web services use, which makes it d...
Chapter
Full-text available
The number of elderly people living alone is increasing. Consequently, a lot of research works have been addressing this issue in order to propose solutions that can enhance the quality of life of elderly people. Most of them have been concerned in dealing with objective issues such as forgetfulness or detecting falls. In this paper, we propose a c...
Chapter
The main purpose of this article is to analyze the impact of the workers’ behavior in terms of their emotions and feelings in system’s performance, i.e., one is looking at issues concerned with Organizational Sustainability. Indeed, one’s aim is to define a process that motivates and inspires managers and personnel to act upon the limit, i.e., to a...
Chapter
Full-text available
To provide recommendations to groups of people is a complex task, especially due to the group’s heterogeneity and conflicting preferences and personalities. This heterogeneity is even deeper in occasional groups formed for predefined tour packages in tourism. Group Recommender Systems (GRS) are being designed for helping in situations like those. H...
Article
Over time there has been an increase of the number of people affected by chronic obstructive respiratory diseases, burdening healthcare providers. Following the growth of information technologies, it has been sought the development of innovative solutions that help monitoring and treating patients. In this work is proposed the architecture for a co...
Preprint
Full-text available
To provide recommendations to groups of people is a complex task, especially due to the group's heterogeneity and conflicting preferences and personalities. This heterogeneity is even deeper in occasional groups formed for predefined tour packages in tourism. Group Recommender Systems (GRS) are being designed for helping in situations like those. H...
Article
Full-text available
Supporting group decision-making when the decision makers are spread around the world is a complex process. The mechanisms of automated negotiation, such as argumentation, can be used in Ubiquitous Group Decision Support Systems (UbiGDSS) to help decision makers find a solution based on their preferences. However, the decision-making process is muc...
Chapter
The manufacturing industry is an ever-changing environment with companies facing increasing external and internal challenges, such as economic crises, technological development and global competition. These challenges create the need for companies to constantly adapt as the environment around them changes. As such, companies are adopting a more pro...
Chapter
The growing ubiquity of IoT, along with bigger steps towards full digitalization in the manufacturing industry, makes it easier to constantly monitor equipment activity and implement predictive maintenance approaches. Big Data solutions are best suited to process the large amounts of data generated through monitorization – additionally, they also a...
Chapter
With the evolution of the organizations and technology, Group Decision Support Systems have changed to support decision-makers that cannot be together at the same place and time to make a decision. However, these systems must now be able to support the interaction between decision-makers and provide all the relevant information at the most adequate...
Conference Paper
The rising needs for increased energy efficiency and better use of renewable energy sources bring out the necessity for improved energy management and forecasting models. Electricity consumption, in particular, is subject to large variations due to the effect of multiple variables, such as the temperature, luminosity or humidity, and of course, con...
Chapter
Full-text available
Dialogue games have been applied to various contexts in computer science and artificial intelligence, particularly to define interactions between autonomous software agents. However, in order to implement dialogue games, the developers need to deal with other important details besides what is presented in the model’s definition. This is a complex w...
Chapter
By combining both semantically annotated documents and semantically annotated services, it is possible for digital solutions to automatically retrieve and assign documents not only to their own services but also to those provided by others, thus improving and optimizing the experience of its users. Most of the information exchanged in and between s...
Article
In future, the organizations’ likelihood to endure and succeed will depend greatly on the quality of every decision made. It is known that most decisions in organizations are made in group. With the purpose of supporting decision-makers anytime and anywhere, Web-based Group Decision Support Systems (GDSS) have been studied. The amount of Web-based...
Article
Full-text available
One of the most important factors to determine the success of an organization is the quality of decisions made. Supporting a decision‐making process is a complex task, mainly when decision‐makers are dispersed. Group decision support systems (GDSSs) have been studied over the last decades with the goal of providing support to decision‐makers; howev...
Chapter
The aims of the TheRoute (Tourism and Heritage Routes including Ambient Intelligence with Visitants’ Profile Adaptation and Context Awareness) project is to conduct studies, research and experimentation around the challenge of automatic generation of routes for visitors. The suggested routes fit the profile of visitors and groups of visitors, inclu...
Chapter
Full-text available
Intrusion detection is a major necessity in current times. Computer systems are constantly being victims of malicious attacks. These attacks keep on exploring new technics that are undetected by current Intrusion Detection Systems (IDS), because most IDS focus on detecting signatures of previously known attacks. This paper explores some unsupervise...
Chapter
Full-text available
New technologies are being developed towards Industry 4.0 such as the establishment of smart factories, smart products and smart services embedded in an internet of things and of services. As a result, the development of prognostic and collaborative technologies have become a necessity. New technological solutions that can make the best use of exis...
Chapter
Full-text available
This chapter describes success stories. The MANTIS architecture (Chapter 3) was implemented for a number of use cases on real pilots, and the techniques described in Chapters 4, 5, and 6 were experimented with in real settings. Results on the techniques were already presented in previous chapters. This chapter, on the other hand, describes the pilo...
Article
The FRASIS project aims to develop, integrate and validate a set of information and communication technologies (ICT) of mobile health (mHealth) for remote monitoring of respiratory function in asthma, using only the smartphone and their embedded sensors. Current tools for asthma self-monitoring and self-managing are complex, unattractive, not indiv...
Article
In this work, we propose an argumentation-based dialogue model designed for Web-based Group Decision Support Systems, that considers the decision-makers' intentions. The intentions are modeled as behavior styles which allow agents to interact with each other as humans would in face-to-face meetings. In addition, we propose a set of arguments that c...
Article
Full-text available
Proactive Maintenance practices are becoming more standard in industrial environments, with a direct and profound impact on the competitivity within the sector. These practices demand the continuous monitorization of industrial equipment, which generates extensive amounts of data. This information can be processed into useful knowledge with the use...
Article
Full-text available
Many multiple criteria decision analysis (MCDA) methods have been proposed over the last decades. Some of the most known methods share some similarities in the way they are used and configured. However, we live in a time of change and nowadays the decision-making process (especially when done in group) is even more demanding and dynamic. In this wo...
Article
Full-text available
Supporting and representing the group decision-making process is a complex task that requires very specific aspects. The current existing argumentation models cannot make good use of all the advantages inherent to group decision-making. There is no monitoring of the process or the possibility to provide dynamism to it. These issues can compromise t...
Chapter
Full-text available
As a consequence of the increasing competitivity in the current economic environment, Proactive Maintenance practices are gradually becoming more common in industrial environments. In order to implement these practices, large amounts of heterogeneous information must be analysed, such that knowledge about the status of the equipment can be acquired...
Chapter
Nowadays, we are seeing the evolution of Industry, and with it, the development of technological solutions that can assure sustainability and competitiveness in the manufacturing environment. Along this evolution, Cyber Physical Systems were developed with the goal to merge both physical and computational processes and to allow predictive, proactiv...
Conference Paper
Different variables should be considered in order to identify the critical aspects that influence ophthalmologic surgery and, in particular, the patient’s conditions that can become the key factor in this process, i.e., in situations that can influence the stability and surgery of the patient. Protocol of ophthalmologic surgery has as main concern...