Nuno Datia

Nuno Datia
Instituto Politécnico de Lisboa | ISEL · Departamento de Engenharia de Electrónica e Telecomunicações e de Computadores

PhD

About

32
Publications
8,665
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
62
Citations

Publications

Publications (32)
Book
This book is devoted to the emerging field of integrated visual knowledge discovery that combines advances in artificial intelligence/machine learning and visualization/visual analytic. A long-standing challenge of artificial intelligence (AI) and machine learning (ML) is explaining models to humans, especially for live-critical applications like h...
Preprint
Full-text available
This volume is devoted to the emerging field of Integrated Visual Knowledge Discovery that combines advances in Artificial Intelligence/Machine Learning (AI/ML) and Visualization/Visual Analytics. Chapters included are extended versions of the selected AI and Visual Analytics papers and related symposia at the recent International Information Visua...
Data
This dataset consists of 6 files, each of which represents the week-long data collected in Lisbon. The time range spans from weeks 46 to 51. Data collection was done through EMEL's free webservice (https://emel.city-platform.com/opendata/), a public company whose mission is to manage mobility and parking in Lisbon. The jam data was enrich with weat...
Conference Paper
Full-text available
Finding a new home in a large city has increasingly become more complex, as people are concerned with not only the estate itself but also with its surroundings. The 15-Minute City concept, thinks of cities as a way to ensure that their residents within a 15-minute radius , can fulfill six essential functions: home, work, commerce, health care, educ...
Conference Paper
Full-text available
O parque automóvel circulante em Portugal tem sofrido um crescimento constante, quer em número de veículos, quer na idade média dos veículos. Os congestionamentos de trânsito, com particular incidência nos centros urbanos, e.g. a cidade de Lisboa, resultam em impactos negativos na vida dos cidadãos, onde se incluem problemas de saúde, económicos, s...
Conference Paper
Full-text available
A poluição atmosférica afeta a saúde da população eé um factor de aumento da taxa de mortalidade. Entidades responsáveis pela gestão de grandes cidades procuram soluções que permitam monitori-zar em tempo real os níveis de poluição em grandesáreas urbanas. No entanto, as soluções existentes para a monitorização de poluição são pro-prietárias ou não...
Article
Full-text available
Web Archiving (WA) deals with the preservation of portions of the World Wide Web (WWW) allowing their availability for the future. Arquivo.pt is a WA initiative holding a huge amount of content, including image files. However, some of these images contain nudity and pornography, that can be offensive for the users, and thus being Not Suitable For W...
Article
Full-text available
Arquivo.pt is a Web Archiving initiative, storing contents preserved from the .pt Web Pages. Among these contents, there are many image files. Some of these images explicitly nudity and pornography, which are offensive for the users, and thus are Not Suitable For Work (NSFW) images. In this paper, we propose a solution to classify NSFW images on Ar...
Article
Full-text available
Crimes, forest fires, accidents, infectious diseases, or human interactions with mobile devices (e.g., tweets) are being logged as spatiotemporal events. For each event, its geographic location, time and related attributes are known with high levels of detail (LoDs). The LoD plays a crucial role when analyzing data, as it can highlight useful patte...
Conference Paper
Full-text available
Nos últimos anos, a ocorrência de fogos florestais em Portugal tem causado danos patrimoniais, destruição de habitats e, tragicamente, a perda de vidas humanas. A estimativa da taxa de recuperação da vegetação numaárea ardidaé possível utilizando dados de deteção remota e, nomeadamente, o muito frequentemente utilizadoÍndice de Diferenças Normaliza...
Conference Paper
Full-text available
In 2018, Lisbon is taking a relevant step launching the very first platform for managing a smart(er) city in Portugal. The platform will support the Lisbon Integrated Operation Center (IOC), integrating Lisbon Municipality (CML) main internal information systems together with external systems from strategic partners. The platform will increase the...
Article
Full-text available
A personal collection of photos shows large variability in the depicted items, making difficult a fully automated solution to cope with sensory and semantic gaps. Emotions and non-visual contextual information can be very important to address those problems. Manual annotations are key, but their time-consuming nature alienate users from doing them....
Conference Paper
For the analysis and comparison of electromyography (EMG) signals from different patients, standardization techniques are used to calculate the integrated EMG signal (iEMG), useful to evaluate the level of activity of different muscles. Currently, monitoring and follow-up of these patients is done in regular health exams where the evolution of pati...
Conference Paper
The field of Information Visualization seeks to identify the general principles of visualization, and makes use of these principles to propose new forms of visualization for specific types of data. Included in these different data types, it was identified a data type which was not thoroughly explored. The notion of entities where each entity is com...
Conference Paper
Full-text available
There are many spatiotemporal events with high levels of detail (LoDs) being collected in many phenomena. The LoD of analysis plays a crucial role in the user’s perception of phenomena. From one LoD to another, some patterns can be easily perceived or different patterns may be detected. Standard practices work on a single LoD driven by the user in...
Conference Paper
Full-text available
People produce an increasing amount of digital photos to document events. Searching for a specific event can result in more photos than people can handle, making difficult judging their relevance. This paper presents a new algorithm, that summarises a set of photos described by attributes at different concept levels. It addresses the well-known hum...
Conference Paper
Full-text available
Reduce the feature space in classification is a critical, although sensitive, task since it depends on a certain definition of relevance. Feature selection has been the motivation for many researchers. In medical datasets, relevant attributes are often unknown a priori. Feature selection provides the features that contribute most to the classificat...
Conference Paper
Full-text available
In this paper, we study how several classification algorithms perform when applied to a breast cancer dataset. The challenge is to develop models for computer-aided detection (CAD), capable to classify, at early stages, masses spotted in X-ray images. The dataset was available at KDD CUP 2008. The imbalanced nature of the dataset and its high-dimen...
Data
Full-text available
This paper presents a comprehensive study of eight data mining algorithms, applied to the identification of pulmonary embolism in Computed Tomographic Pulmonary Angiography (CTA). Several experiments were conducted, including different train sets and post-processing techniques, towards the maximization of Pulmonary Embolism sensitivity and Patient...
Conference Paper
Full-text available
Today there are no Business Intelligence (BI) open source tools, compliant with the Sistema de Normalização Contabilística (SNC), that supports the management and financial analysis in companies.Combining the requirements im-posed by the SNC and the differences of each business, poses some challenges designing a generic financial framework that sat...
Conference Paper
Full-text available
Neste artigo é apresentada uma proposta que visa simplificar a integração de diversos data marts heterogéneos. Este é um problema recorrente sempre que é necessário integrar diferentes data marts, desenvolvidos de forma independente, e que contêm informação que é necessário conjugar para melhorar as tomadas de decisões nas organizações. A integraçã...
Conference Paper
Full-text available
In every Online Analytical Processing (OLAP) cube, there are certain type of measures, generally referred as facts, that must be treated carefully, due to their non-addictive nature. This means they can't be added directly to present a summarised result. In this paper, the authors focused on a specific type of non-addictive facts, quota sampled bas...
Conference Paper
Full-text available
Audiometer systems provide enormous amounts of detailed TV watching data. Several relevant and interdependent factors may influence TV viewers' behavior. In this work we focus on the tune factor and derive temporal patterns of TV watching, based on panel data. Clustering base attributes are originated from 1440 binary minute-related attributes, cap...
Article
Full-text available
Resumo Nos últimos 30 anos tem-se assistido a um rápido desenvolvimento de técnicas de aprendizagem automática, por exemplo, para classificação e para agrupamento (Clustering). A área do KDD – Descoberta de Conhecimento a partir de Bases de Dados, tem por objectivo a aplicação destas técnicas sobre grandes volumes de informação. audimetria a operar...

Network

Cited By

Projects

Project (1)
Project
The goal of the tasks assign to the ISEL team is to assess the 5G network performance in the technical context of autonomous vehicles specifications. Using the defined use cases and applications we will measure latency, coverage and 5G network capacity limits. Results will include network specifications and recommendations, useful for 5G operators when performing a 5G network design (of particular interest for 5G networks applied on autonomous vehicles). The previous objectives will be based on a new QoS tool that will be developed to collect different KPIs from Nokia 5G network nodes and servers. This process will be implemented using Nokia’s open APIs, available in different 5G network nodes/components. Besides network assessment, this tool will also allow network troubleshooting, enabling the identification of possible problematic nodes. Project funded by the European Commission.