Joao Rodrigues

Joao Rodrigues
Universidade do Algarve | UALG · Departamento de Engenharia Electrotécnica (DEE)

PhD

About

186
Publications
41,490
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1,034
Citations
Introduction
Additional affiliations
November 2013 - present
Universidade do Algarve
Position
  • Professor (Assistant)

Publications

Publications (186)
Preprint
Full-text available
We compute the quasinormal frequencies of d-dimensional large spherically symmetric black holes with Gauss-Bonnet corrections in the highly damped regime. We solve perturbatively the master differential equation and we compute the monodromies of the master perturbation variable (analytically continued to the complex plane) in different contours, in...
Article
Full-text available
A bstract We compute the quasinormal frequencies of d -dimensional spherically symmetric black holes with leading string α′ corrections for tensorial gravitational perturbations in the highly damped regime. We solve perturbatively the master differential equation and we compute the monodromies of the master perturbation variable (analytically conti...
Preprint
Full-text available
We compute the quasinormal frequencies of $d$-dimensional spherically symmetric black holes with leading string $\alpha'$ corrections for tensorial gravitational perturbations in the highly damped regime. We solve perturbatively the master differential equation and we compute the monodromies of the master perturbation variable (analytically continu...
Article
We compute the quasinormal frequencies of d-dimensional spherically symmetric black holes with leading string α′ corrections in the eikonal limit for tensorial gravitational perturbations and scalar test fields. We find that, differently than in Einstein gravity, the real parts of the frequency are no longer equal for these two cases. The correspon...
Preprint
Full-text available
We compute the quasinormal frequencies of $d$-dimensional spherically symmetric black holes with leading string $\alpha'$ corrections in the eikonal limit for tensorial gravitational perturbations and scalar test fields. We find that, differently than in Einstein gravity, the real parts of the frequency are no longer equal for these two cases. The...
Article
Full-text available
Monuments, museums and cities are great places to feel and experience neat and interesting things. But cultural heritage is experienced differently by different visitors. The more erudite may know beforehand what they intend to explore, while the least literate usually know and are capable of expressing some of their preferences but do not exactly...
Chapter
Segmentation process serves to aid the pathology diagnosing process since segmentation filters the interference from other anatomical structures and helps focus on the posterior segment structures of the eye, highlighting a set of signals that will serve for diagnosis of various retinal pathologies. Automatic retinal vessel segmentation can lead to...
Chapter
Retrieving the layout of different cluttered indoor scenes from monocular images is a challenging task, using a smaller deep neural network than the existing proposals. Previous geometric solutions are prone to failure in the presence of cluttered scenes because they depend strongly on hand-engineering features and the expectation of the possibilit...
Chapter
Centennials are the young consumers born into the Internet age who regard social networks as the prime means of communicating with friends, searching for product and brand information. Social networks enable this type of consumer to become a brand agent when they share their opinions through comments and ratings about their products, which contribu...
Book
Smart systems when connected to artificial intelligence (AI) are still closely associated with some popular misconceptions that cause the general public to either have unrealistic fears about AI or to expect too much about how it will change our workplace and life in general. It is important to show that such fears are unfounded, and that new trend...
Chapter
Artificial Intelligence and Smart Systems are having an increasing impact on our day to day lives and on how our cities handle our ever-growing needs. Smart systems are systems capable of making decisions based on data received from different sensors and performing actions based on those decisions. These (smart) actions could and should be differen...
Chapter
Energy consumption and, consequently, the associated costs (e.g., environmental and monetary) concern most individuals, companies, and institutions. Platforms for the monitoring, predicting, and optimizing energy consumption are an important asset that can contribute to the awareness about the ongoing usage levels, but also to an effective reductio...
Chapter
Smart systems make decisions incorporating data available from different sensing in a way to control and make smart actions. In this context, smart actions consist in augmenting user's actions and/or decisions by using devices or additional information. Those actions could and should be different from user to user, depending on its characteristics...
Article
Full-text available
The application of the most recent technologies is fundamental to add value to tourism experiences, as well as in other economic sectors. Mobile Five Senses Augmented Reality (M5SAR) system is a mobile guide instrument for cultural, historical, and museum events. In order to realize the proclaimed five senses, the system has two main modules: a (i)...
Article
Full-text available
Action recognition is of great importance in understanding human motion from video. It is an important topic in computer vision due to its many applications such as video surveillance, human–machine interaction and video retrieval. One key problem is to automatically recognize low-level actions and high-level activities of interest. This paper prop...
Chapter
Social networks have changed the way people and companies communicate. Nowadays, more and more elderly persons are using these platforms to communicate with friends and family, access news, entertainment and education. This study focuses on the elderly population and its use of social networks, and analyzes the contribution provided by the platform...
Chapter
Full-text available
When it comes to visitors’ experiences at museums and heritage attractions, objects speak for themselves. With the aim of enhancing a traditional museum visit, a mobile Augmented Reality (AR) framework was developed during the M5SAR project. This paper presents two modules, the wall and human shape segmentation with AR content superimposition. The...
Book
The International Conference on Computational Science is an annual conference that brings together researchers and scientists from mathematics and computer science as basic computing disciplines, as well as researchers from various application areas who are pioneering computational methods in sciences such as physics, chemistry, life sciences, engi...
Book
The five-volume set LNCS 11536, 11537, 11538, 11539 and 11540 constitutes the proceedings of the 19th International Conference on Computational Science, ICCS 2019, held in Faro, Portugal, in June 2019. The total of 65 full papers and 168 workshop papers presented in this book set were carefully reviewed and selected from 573 submissions (228 submis...
Book
As innovators continue to explore and create new developments within the fields of artificial intelligence and computer science, subfields such as machine learning and the internet of things (IoT) have emerged. Now, the internet of everything (IoE), foreseen as a cohesive and intelligent connection of people, processes, data, and things, is theoriz...
Chapter
In many countries, renewable energy production already represents an important percentage of the total energy that is generated in electrical grids. In order to reach higher levels of integration, demand side management measures are yet required. In fact, different from the legacy electrical grids, where at any given instant the generation levels a...
Chapter
The internet of everything is a network that connects people, data, process, and things, making it easier to understand that many subfields of knowledge are discussable while addressing this subject. This chapter makes a survey on the application of machine learning algorithms to the internet of everything. This survey is particularly focused in co...
Book
The five-volume set LNCS 11536, 11537, 11538, 11539 and 11540 constitutes the proceedings of the 19th International Conference on Computational Science, ICCS 2019, held in Faro, Portugal, in June 2019. The total of 65 full papers and 168 workshop papers presented in this book set were carefully reviewed and selected from 573 submissions (228 submis...
Article
Full-text available
Cultural Heritage (CH) is an essential expression of the wealth and diversity of human cultures, and therefore its documentation, interpretation, restoration, and dissemination are considered to be crucial tasks. Information and Communication Technologies (ICTs) provide researchers with powerful tools to deal with the digital acquisition, storage,...
Conference Paper
Internet of Everything (IoE) intends to connect people, processes and things in an intelligent way to improve the user's experience and the person's well-being. With increasing life expectancy, the aging population is growing in developed countries, the use of technologies by seniors can contribute to their well-being, especially the internet and s...
Conference Paper
The Internet of Everything (IoE) is the networked connection of people, data, processes and things. Accessibility for All in Tourism is a project that aims to study the "accessibility for all" has a quality attribute in sustainable mobility, senior tourism, social inclusion and territorial marketing. It considers the needs of the elderly and other...
Chapter
The visit to cultural places can be an enormous pleasure, where visitors are driven to see and explore historical or contemporary objects. The same journey can also be fastidious when the visitor is taken to lengthy walks, unwanted collections or the objects archive is too large. For many of us, a visit should be something limited in time, showing...
Chapter
As the number of Plug-In Electric Vehicles continues to rise, existing electrical grids need to adapt to support the expected charging demand of such vehicles. Fortunately, a growing number of renewable energy sources are also being introduced in current electrical grids, reducing the dependency on fossil fuels. Leveraged by the self-consumption le...
Chapter
The increasing immersion of technology on our daily lives demands for additional investments in various areas, including, as in the present case, the enhancement of museums’ experiences. One of the technologies that improves our relationship with everything that surrounds us is Augmented Reality. This paper presents the architecture of MIRAR, a Mob...
Chapter
Full-text available
As a consequence of the technological advances and the widespread use of mobile devices to access information and communication in the last decades, mobile learning has become a spontaneous learning model, providing a more flexible and collaborative technology-based learning. Thus, mobile technologies can create new opportunities for enhancing the...
Article
Biologically–compatible methods are not commonly used for face recognition. Complex computational approaches are preferred and dominate the state of the art. However, we know that the human brain is very efficient at processing faces, without explicitly depending on advanced mathematics. In this paper we focus on evaluating the performance of an ex...
Chapter
The purpose of this work is to present a portable hardware device that can provide touch, taste and smell sensations to an augmented reality experience. The proposed hardware is part of a mobile five senses augmented reality system for Museums, to improve and augment, as much as possible, the visiting of a museum, i.e., see, ear, touch, feel and ex...
Chapter
The application of the most recent technologies is fundamental to achieve sustainability in tourism, as well as in other economic sectors. This paper presents the initial architecture of MIRAR, a Mobile Image Recognition based Augmented Reality framework, which aims the development of Augmented Reality applications for mobile devices. The MIRAR fra...
Article
Full-text available
“The lives of others” is an interactive audiovisual installation that is based on a voyeuristic approach of the binomial inside / outside and private / public, between the finished product presentable to the public and the mechanism that generates it. This mechanism consisting of physical devices and logical-mathematical instructions usually remain...
Chapter
Information and Communication Technologies (ICT) have established a growing and deeper interconnection alliance with the tourism sector. Few solutions have contributed to the dissemination of cultural and religious heritage of the regions, as a means of promoting it, making known and enriching the culture of its visitors and residents. The developm...
Chapter
The Mobile Five Senses Augmented Reality System for Museums (M5SAR) project aims to development an Augmented Reality mobile system for museums. Museums are amazing places, where it is important to sensorial augment as much as possible the visits, permitting to see, ear, touch, smell, and taste all the interesting objects there exist. Also fundament...
Article
Learning robust keypoint descriptors has become an active research area in the past decade. Matching local features is not only important for computational applications, but may also play an important role in early biological vision for disparity and motion processing. Although there were already some floating-point descriptors like SIFT and SURF t...
Conference Paper
Museums are great places where visitors can see, hear, touch, feel and experience interesting things. The visit is even better when visitors can select what they want to see and have ways to enhance their experience. Many museums have a huge amount of collections and objects, selecting which ones to see is sometimes difficult. A system that adapts...
Conference Paper
Visiting a museum should be an apprised experience. However, for a part of the visitors, the experience can be disappointing in some aspect, either because of the vastness of the estate, leading to tiredness, or the inappropriateness of the presented objects for the consumer intentions. A solution is to endorse different arrangements according with...
Conference Paper
Pose estimation is the task of predicting the pose of an object in an image or in a sequence of images. Here, we focus on articulated human pose estimation in scenes with a single person. We employ a series of residual auto-encoders to produce multiple predictions which are then combined to provide a heatmap prediction of body joints. In this netwo...
Article
In order to increase the hotel's competitiveness, to maximize its revenue, to meliorate its online reputation and improve customer relationship, the information about the hotel's business has to be managed by adequate information systems (IS). Those IS should be capable of returning knowledge from a necessarily large quantity of information, antici...
Article
Full-text available
A realização de viagens por motivos religiosos tem sido transversal ao longo da evolução da humanidade, nas décadas mais recentes, algumas destas viagens foram motivadas pelo turismo (religioso). As tecnologias da informação e comunicações (TIC) tem tido muito impacto sobre o turismo ao longo das últimas décadas, uma vez que a informação é um dos a...
Book
This book constitutes the refereed proceedings of the 8th Iberian Conference on Pattern Recognition and Image Analysis, IbPRIA 2017, held in Faro, Portugal, in June 2017. The 60 regular papers presented in this volume were carefully reviewed and selected from 86 submissions. They are organized in topical sections named: Pattern Recognition and Mach...
Article
With new marketing strategies and technologies, new demands arise, and the standard public relation or salesperson is not enough, costumers tend to have higher standards while companies try to capture their attention, requiring the use of creative contents and ideas. For this purpose, this article describes how an interactive holographic installati...
Article
Full-text available
Interactive films depend on the participation of viewers. This participation usually translates into making decisions that determine the sequence of the narrative. Many interactive films make use of an interaction design that reduces the viewer's immersiveness by interrupting the narrative to allow choices and the use of graphics to alert about dec...
Conference Paper
Museums are great places to see, ear, touch, feel and experience cool and interesting things. Even better when you can set your own itinerary, or you can move at your own pace and at the same time have all the complementary information you need about a piece. This paper presents an initial framework for a museum application where augmented reality...
Conference Paper
Cultural heritage is experienced differently by different visitors. The more erudite know beforehand what they intend to explore when visiting a monument, a museum or a city. On the other side, least erudite visitors usually know and are capable of expressing some of their preferences but do not realize exactly what to see and explore. Physical and...
Conference Paper
http://recpad2016.web.ua.pt/RecPad2016_Proceedings.pdf
Conference Paper
Pedestrian detection and tracking remains popular issue in computer vision, with many applications in robotics, surveillance, security and telecare systems, especially when connected with Smart Cities and Smart Destinations. As a particular case of object detection, pedestrian detection in general is a difficult task due to a large variability of f...
Conference Paper
The rapidly increasing population of elderly persons is a phenomenon which affects almost the entire world. Although there are many telecare systems that can be used to monitor senior persons, none integrates one key requirement: detection of abnormal behavior related to chronic or new ailments. This paper presents a framework based on deep neural...
Conference Paper
The communication between people with normal hearing with those having hearing or speech impairment is difficult. Learning a new alphabet is not always easy, especially when it is a sign language alphabet, which requires both hand skills and practice. This paper presents the GyGSLA system, standing as a completely portable setup created to help ine...
Chapter
As Human Computer Interaction technologies evolve, they are supporting the generation of innovative solutions in a broad range of domains. Among them, Serious Games are defined as new type of computer game that is capable of stimulating users to learn, by playing and competing against themselves, against other users or against a computer applicatio...
Chapter
Full-text available
As computing equipment become ubiquitous, a new set of interfacing devices need to be developed and properly adapted to the conditions where this equipment is to be used. Interacting with machines might present difficulties relative to the handiness of common interfacing devices, when wearing certain clothes, doing certain dirty jobs, or when they...
Chapter
Full-text available
In the globalized world, possessing good products may not be enough to reach potential clients unless creative marketing strategies are well delineated. In this context, public relations are also important when it comes to capture the client’s attention, making the first contact between the clients and the company’s products, while being persuasive...
Article
Pool and billiards are amongst a family of games played on a table with six pockets along the rails. This paper presents an augmented reality tool designed to assist unskilled or amateur players of such games. The system is based on a projector and a Kinect 2 sensor placed above the table, acquiring and processing the game on-the-fly. By using dept...
Article
Full-text available
Online presence is essential for tourism organisations, and the quality of websites can influence customers. In the case of hotels, there are many studies to evaluate website performance based on functionality, usability and other factors, much less on the amount of different information available to the consumer. In the near future by using Big Da...
Article
Online presence is essential for tourism organisations, and the quality of websites can influence customers. In the case of hotels, there are many studies to evaluate website performance based on functionality, usability and other factors, much less on the amount of different information available to the consumer. In the near future by using Big Da...
Chapter
In order to manage their activities in a centralized manner, an Enterprise Resource Planning (ERP) software is a fundamental tool to many companies. As a generic software, many times it’s necessary to add new functionalities to the ERP in order to improve and to adapt/suite it to the companies’ processes. The Intelligent Fresh Food Fleet Router (i3...
Chapter
Full-text available
In the globalized world, possessing good products may not be enough to reach potential clients unless creative marketing strategies are well delineated. In this context, public relations are also important when it comes to capture the client's attention, making the first contact between the clients and the company's products, while being persuasive...
Chapter
Full-text available
In the globalized world, possessing good products may not be enough to reach potential clients unless creative marketing strategies are well delineated. In this context, public relations are also important when it comes to capture the client's attention, making the first contact between the clients and the com-pany's products, while being persuasiv...
Article
In the globalized world, good products may not be enough to reach potential clients if creative marketing strategies are not well delineated. Public relations are also important when it comes to capture clients attention, making the first contact between them and companies products while being persuasive enough to trust that the company has the rig...
Article
Full-text available
Sometimes people look for freedom in the virtual world. However, not all have the possibility to interact with a computer in the same way. Nowadays, almost every job requires interaction with computerized systems, so people with physical impairments do not have the same freedom to control a mouse, a keyboard or a touchscreen. In the last years, som...
Article
Full-text available
Natural User Interface (NUI) is a term used for human-computer interfaces where the interface is invisible or becomes invisible after successive user-immersion levels, it is typically based on the human nature or human natural elements. Currently several three-dimensional (3D) sensors and system can be used to interpret specific human gestures, ena...
Article
Information and Communication Technologies (ICT) and Tourism development are interlinked. ICT provide the tools and promote tourism demand and supply, by facilitating the existence and development of tourism and in resolving the needs inherent to the tourism activity. Consequently, tourism increases ICT requirements, since technological development...
Conference Paper
Human-robot interaction is an interdisciplinary research area that is becoming more and more relevant as robots start to enter our homes, workplaces, schools, etc. In order to navigate safely among us, robots must be able to understand human behavior, to communicate, and to interpret instructions from humans, either by recognizing their speech or b...
Conference Paper
The process of picking goods from a warehouse and loading distribution vehicles is done in a systematic manner which in general corresponds to a certain order. For instance in the delivery of goods, it may be important to load the transportation vehicles in the reverse order of the customers visit, in furtherance of better accessing the products wh...
Article
Object categorisation is a research area with significant challenges, especially in conditions with bad lighting, occlusions, different poses and similar objects. This makes systems that rely on precise information unable to perform efficiently, like a robotic arm that needs to know which objects it can reach. We propose a biologically inspired obj...
Article
Full-text available
The visual cortex is able to extract disparity information through the use of binocular cells. This process is reflected by the Disparity Energy Model, which describes the role and functioning of simple and complex binocular neuron populations, and how they are able to extract disparity. This model uses explicit cell parameters to mathematically de...
Conference Paper
Full-text available
A videoarte, ou vídeo arte ou vídeo-arte é uma forma de expressão artística que utiliza a tecnologia do vídeo em artes visuais. Numa ligação estreita com o universo das Artes Digitais, este artigo pretende relacionar práticas definidas entre o video e a instalação, numa procura constante de novos modos de expressão artística com interfaces naturais...