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Rebelo A.,University of Minho | Catalao F.,University of Minho | Alves J.,University of Minho | Marreiros G.,GECAD Knowledge Engineering and Decision Support Group | And 4 more authors.
International Journal of Imaging and Robotics | Year: 2015

The study of the impact of emotion and affect in decision making processes involved in a working team stands for a multi-disciplinary issue (e.g. with insights from disciplines such as Psychology, Neuroscience, Philosophy and Computer Science). On the one hand, and in order to create such an environment we look at a team of affective agents to play into a battlefield, which present different emotional profiles (e.g. personality and mood). An emotional system, based on the OCC (Ortony, Clore and Collins) model, was proposed and implemented. As a way to integrate the personality of a robot with its emotions we used pleasure-arousal-dominance (PAD) model of mood. On the other hand, to attain cooperation, a voting mechanism and a decision-making process was implemented, being Robocode used as the simulation environment. Indeed, the results so far obtained are quite satisfying; the agent team performs quite well in the battlefield and undertakes different behaviours depending on the skirmish conditions. © 2015 by IJIR (CESER PUBLICATIONS).


Rebelo A.,University of Minho | Catalao F.,University of Minho | Alves J.,University of Minho | Marreiros G.,GECAD Knowledge Engineering and Decision Support Group | And 4 more authors.
Advances in Intelligent Systems and Computing | Year: 2013

The study of the impact of emotion and affect in decision making processes involved in a working team stands for a multi-disciplinary issue (e.g. with insights from disciplines such as Psychology, Neuroscience, Philosophy and Computer Science). On the one hand, and in order to create such an environment we look at a team of affective agents to play into a battlefield, which present different emotional profiles (e.g. personality and mood).On the other hand, to attain cooperation, a voting mechanism and a decision-making process was implemented, being Robocode used as the simulation environment. Indeed, the results so far obtained are quite satisfying; the agent team performs quite well in the battlefield and undertakes different behaviours depending on the skirmish conditions. © Springer International Publishing Switzerland 2013.


Loureiro D.,GECAD Knowledge Engineering and Decision Support Group | Marreiros G.,GECAD Knowledge Engineering and Decision Support Group | Neves J.,University of Minho
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2011

The growth of content on the web has been followed by increasing interest in opinion mining. This field of research relies on accurate recognition of emotion from textual data. There's been much research in sentiment analysis lately, but it always focuses on the same elements. Sentiment analysis traditionally depends on linguistic corpora, or common sense knowledge bases, to provide extra dimensions of information to the text being analyzed. Previous research hasn't yet explored a fully automatic method to evaluate how events associated to certain entities may impact each individual's sentiment perception. This project presents a method to assign valence ratings to entities, using information from their Wikipedia page, and considering user preferences gathered from the user's Facebook profile. Furthermore, a new affective lexicon is compiled entirely from existing corpora, without any intervention from the coders. © 2011 Springer-Verlag.


Santos R.,GECAD Knowledge Engineering and Decision Support Group | Santos R.,Polytechnic Institute of Porto | Marreiros G.,GECAD Knowledge Engineering and Decision Support Group | Marreiros G.,Polytechnic Institute of Porto | And 4 more authors.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

Despite the advances in argumentation on group decision negotiation there is a need to simulate and identify the personality of participants. To make participants agents more human-like and to increase their flexibility in the negotiation process in group decision-making, the authors investigated the role of personality behaviours of participants applied to the conflict style theme. The negotiation is made in a bilateral way where both parties are OCEAN participant agents based on the fivefactor model of personality (Openness, Conscientiousness, Extraversion, Agreeableness and Negative emotionality). © Springer-Verlag Berlin Heidelberg 2010.


Fernandes J.,University of Minho | Laranjeira J.,Computer Science and Technology Center | Novais P.,University of Minho | Marreiros G.,Polytechnic Institute of Porto | And 2 more authors.
Advances in Intelligent Systems and Computing | Year: 2013

Nowadays there are several systems that help people with disabilities on their quotidian tasks. The visual impairment is a problem that affects several people in their tasks and movements. In this work we propose an architecture capable of processing information from the environment and suggesting actions to the user with visual impairments, to avoid a possible obstacle. This architecture intends to improve the support given to the user in their daily movements. The idea is to use speculative computation to predict the users' intentions and even to justify the reactive or proactive users' behaviors. © Springer International Publishing Switzerland 2013.


Laranjeira J.,Computer Science and Technology Center | Marreiros G.,GECAD Knowledge Engineering and Decision Support Group | Marreiros G.,Polytechnic Institute of Porto | Carneiro J.,GECAD Knowledge Engineering and Decision Support Group | Novais P.,University of Minho
Advances in Intelligent Systems and Computing | Year: 2013

In an idea generation meeting, the facilitator role is essential to obtain good results. The emotional context of the meeting partially determines the (un)success of the meeting, so the facilitator needs to obtain and process this information. Thus, the facilitator role is to assist the participants to reach their goals, i.e., to generate ideas with quality. In this paper is proposed an emotional aware architecture whose aim is to assist the facilitator in the process of maximizing the results of the meeting. © Springer International Publishing Switzerland 2013.


Luz N.,GECAD Knowledge Engineering and Decision Support Group | Anacleto R.,GECAD Knowledge Engineering and Decision Support Group | Martins C.,GECAD Knowledge Engineering and Decision Support Group | Almeida A.,GECAD Knowledge Engineering and Decision Support Group | Lucas J.P.,University of Salamanca
International Journal of Web Engineering and Technology | Year: 2013

In this paper, we present the tours planning system entitled TOURSPLAN, along with a new lightweight user modelling (UM) process intended to work as a tourism recommendation system in a commercial environment. The new process tackles issues like cold start, grey sheep and over-specialisation through a rich user model and the application of a gradual forgetting function to the collected user action history. Also, significant performance improvements were achieved regarding the previously proposed UM process. Copyright © 2013 Inderscience Enterprises Ltd.


Freitas C.F.,GECAD Knowledge Engineering and Decision Support Group | Freitas C.F.,Polytechnic Institute of Porto | Meireles A.,GECAD Knowledge Engineering and Decision Support Group | Figueiredo L.,GECAD Knowledge Engineering and Decision Support Group | And 4 more authors.
Proceedings - 4th International Conference on Ubi-Media Computing, U-Media 2011 | Year: 2011

In a globalized world members of groups may be anywhere, and the need for ubiquitous Idea Generation emerged. This led to two main needs: the creation of Smart Decision Rooms prepared for this new reality and following the Ambient Intelligence paradigm; and the creation of context aware middleware. This paper describes OLAVAmI a context aware middle-ware system which was tested in LAID environment, a Smart Meeting Room. OLAVAmI allows video production focusing on the speaker, an audio-to-text conversion service, and the multimedia database of meetings produced in an autonomous way. To experiment OLAVAmI usage and functionalities one of the tools present in LAID test bed was used and the results are presented in this article. © 2011 IEEE.


Martins C.,GECAD Knowledge Engineering and Decision Support Group | Couto P.,GECAD Knowledge Engineering and Decision Support Group | Fernandes M.,GECAD Knowledge Engineering and Decision Support Group | Bastos C.,GECAD Knowledge Engineering and Decision Support Group | And 3 more authors.
Advances in Intelligent and Soft Computing | Year: 2011

The aim of this paper is to present an Educational Adaptive Hypermedia Tool, PCMAT, Based on Progressive Assessment and adapted to the student model and learning style. The adaptation of the application is based on progressive selfassessment (exercises, tasks, etc.). The learning platform was already implemented, tested and evaluated in learning processes in Basic Schools. Also, the paper defines and evaluates the characteristic of the User Model to be used in the Student Modeling. © 2011 Springer-Verlag Berlin Heidelberg.


Rodrigues F.,GECAD Knowledge Engineering and Decision Support Group | Figueiredo V.,GECAD Knowledge Engineering and Decision Support Group | Vale Z.,GECAD Knowledge Engineering and Decision Support Group
Frontiers in Artificial Intelligence and Applications | Year: 2010

This paper presents an integrated system that helps both retail companies and electricity consumers on the definition of the best retail contracts and tariffs. This integrated system is composed by a Decision Support System (DSS) based on a Consumer Characterization Framework (CCF). The CCF is based on data mining techniques, applied to obtain useful knowledge about electricity consumers from large amounts of consumption data. This knowledge is acquired following an innovative and systematic approach able to identify different consumers' classes, represented by a load profile, and its characterization using decision trees. The framework generates inputs to use in the knowledge base and in the database of the DSS. The rule sets derived from the decision trees are integrated in the knowledge base of the DSS. The load profiles together with the information about contracts and electricity prices form the database of the DSS. This DSS is able to perform the classification of different consumers, present its load profile and test different electricity tariffs and contracts. The final outputs of the DSS are a comparative economic analysis between different contracts and advice about the most economic contract to each consumer class. The presentation of the DSS is completed with an application example using a real data base of consumers from the Portuguese distribution company. © 2010 The authors and IOS Press. All rights reserved.

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