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Publications

2018

Phenotyping Obstructive Sleep Apnea Patients: A First Approach to Cluster Visualization

Authors
Ferreira Santos, D; Pereira Rodrigues, P;

Publication
DECISION SUPPORT SYSTEMS AND EDUCATION: HELP AND SUPPORT IN HEALTHCARE

Abstract
The varied phenotypes of obstructive sleep apnea (OSA) poses critical challenges, resulting in missed or delayed diagnosis. In this work, we applied k-modes, aiming to identify groups of OSA patients, based on demographic, physical examination, clinical history, and comorbidities characterization variables (n=41) collected from 318 patients. Missing values were imputed with k-nearest neighbours (k-NN) and chi-square test was held. Thirteen variables were inserted in cluster analysis, resulting in three clusters. Cluster 1 were middle-aged men, while Cluster 3 were the oldest men and Cluster 2 mainly middle-aged women. Cluster 3 weighted the most, whereas Cluster 1 weighted the least. The same effect was described in increased neck circumference. The percentages of variables driving sleepiness, congestive heart failure, arrhythmias and pulmonary hypertension were very low (<20%) and OSA severity was more common in mild level. Our results suggest that it is possible to phenotype OSA patients in an objective way, as also, different (although not considered innovative) visualizations improve the recognition of this common sleep pathology.

2018

Preface

Authors
Silva, MF; Virk, GS; Tokhi, MO; Malheiro, B; Ferreira, P; Guedes, P;

Publication
Human-Centric Robotics- Proceedings of the 20th International Conference on Climbing and Walking Robots and the Support Technologies for Mobile Machines, CLAWAR 2017

Abstract

2018

Developing a metadata application profile for the daily hire labour

Authors
Sen, Sangeeta; Raza, Nishat; Dutta, Animesh; Malta, Mariana Curado; Baptista, Ana Alice;

Publication

Abstract
EMPOWER SSE is a Fundação para a Ciência e Tecnologia (FCT, Portugal) and Department of Science & Technology (DST, India), financed research project that aims to use the Linked Open Data Framework to empower the Social and Solidarity Economy (SSE) Agents. It is a collaborative project between India and Portugal that is focused on defining a Semantic Web framework to consolidate players of the informal sector, enabling a paradigm shift. The Indian economy can be categorized into two sectors: formal and informal. The informal sector economy differs from the formal as it is an unorganized sector and comprised of economic activities that are not covered by formal arrangements such as taxation, labor protections, minimum wage regulations, unemployment benefits, or documentation. The major economy in India depends on the skilled labor of this informal sector such e.g. daily labor, farmers, electricians, food production, and small-scale industries (Kalyani, 2016). The informal sector is mainly made of skilled people that follow their family job traditions, sometimes they are not even formally trained. This sector struggles with the lack of information, data sharing needs and interoperability issues across systems and organizational boundaries. In fact, this sector does not have any visibility to the society not having the possibility to do business as most of the agents of this sector do not reach the end of the chain. This blocks them from getting proper exposure and a better livelihood.

2018

MAESTRI efficiency framework as a support tool for industrial symbiosis implementation

Authors
Baptista, AJ; Lourenco, EJ; Pecas, P; Silva, EJ; Estrela, MA; Holgado, M; Benedetti, M; Evans, S;

Publication
WASTES - SOLUTIONS, TREATMENTS AND OPPORTUNITIES II

Abstract
Industrial Symbiosis (IS) envisages a collaborative approach to resource efficiency, encouraging companies to recover, reprocess and reuse waste within the industrial network. Several challenges regarding the effective application of IS continue to limit a broader implementation of this area of Industrial Ecology. The MAESTRI project encompasses an Industrial Symbiosis approach within the scope of sustainable manufacturing for process industries that fosters the sharing of resources (energy, water, residues, etc.) between different processes of a single company or between multiple companies. The Industrial Symbiosis approach is integrated with Efficiency Framework in the so-called MAESTRI Total Efficiency Framework. Efficiency Framework is devoted to the combination of eco-efficiency (via ecoPROSYS) and the efficiency assessment (via MSM - Multi-Layer Stream Mapping). In this manuscript the benefit of the combination of the Efficiency Framework as an facilitator to a more effective application of Industrial Symbiosis, within or outside the company's boundaries, is explored.

2018

Joint IEEE PELS/IAS Federal University of Campina Grande Student Branch Chapter Promotes Power Activities [Society News]

Authors
de Freitas, NB; Costa, LA; Vitorino, MA;

Publication
IEEE Power Electronics Magazine

Abstract

2018

Modelling, Trajectory Planning and Control of a Quadruped Robot Using Matla® /Simulink™

Authors
Oliveira, I; Barbosa, R; Silva, M;

Publication
ROBOT 2017: THIRD IBERIAN ROBOTICS CONFERENCE, VOL 2

Abstract
Due to the difficulty of building and making control tests in real robots, it is usual to first have a simulated model that provides a good approach of a real robot's behaviour. The importance of a good control system in execution of a planned trajectory inspired this work, whose purpose is to design a control system for a quadruped robot and test its performance.

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