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- Technological modernization and innovation of traditional agri‐food companies based on ICT solutionsPublication . Gaspar, Pedro Dinis; Soares, Vasco N. G. J.; Caldeira, João; Andrade, Luís P.; Soares, Cláudia D.This paper assesses the potential for technological modernization and innovation based on Information and Communication Technologies (ICT) in traditional agri‐food companies located in the central region of Portugal. A survey was applied to 50 agri‐food companies of cereals, cheese, olive oil, dry sausages, honey, wine, and horticultural sectors. Results analysis show that companies use computers, have internet service, and use social networks for business purposes. However, most of it have no webpage, do not use internet for advertising/selling/buying products, and have not promoted collaborators’ ICT training. Companies expect webpages to improve their productivity and/or marketing products/services. Recommendations were provided to promote the use of ICT for business purposes. Webpages, Facebook pages, and CRM systems were developed to a limited set of companies. The results of the satisfaction survey of the ICT solution confirm the company sales increase due to the web visibility gained by the company products.
- iSensA - A System for Collecting and Integrating Sensor DataPublication . Caldeira, João; Soares, Vasco N. G. J.; Gaspar, Pedro Dinis; Rodrigues, Joel P. C.; Fontes, Ricardo; Silva, José Luís LopesThe idea of monitoring several types of parameters in various environments has been motivating significant research works in Internet of Things (IoT). This paper presents the design and construction of iSensA, a system for integrating and collecting information from sensors. The solution implements a multi-sensor monitoring system and then expands the monitoring concept to an IoT solution, by employing multi-network access, Web services, database and web and mobile applications for user interaction. iSensA system is highly configurable, enabling several monitoring solutions with different types of sensors. Experiments have been performed on real application scenarios to validate and evaluate our proposition.
- Performance assessment of mobility solutions for IPv6-based healthcare wireless sensor networksPublication . Caldeira, João Manuel Leitão Pires; Rodrigues, Joel José Puga Coelho; Lorenz, PascalThis thesis focuses on the study of mobile wireless sensor networks applied to healthcare scenarios. The promotion of better quality-of-life for hospitalized patients is addressed in this research work with a solution that can help these patients to keep their mobility (if possible). The solution proposed allows remote monitoring and control of patients’ health in real-time and without interruptions. Small sensor nodes able to collect and send wirelessly the health parameters allow for the control of the patients' health condition. A network infrastructure, composed by several access points, allows the connection of the sensor nodes (carried by the patients) to remote healthcare providers. To ensure continuous access to sensor nodes special attention should be dedicated to manage the transition of these sensor nodes between different access points’ coverage areas. The process of changing an access point attachment of a sensor node is called handover. In that context, this thesis proposes a new handover mechanism that can ensure continuous connection to mobile sensor nodes in a healthcare wireless sensor network. Due to the limitations of sensor nodes’ resources, namely available energy (these sensor nodes are typically powered by small batteries), the proposed mechanism pays a special attention in the optimization of energy consumption. To achieve this optimization, part of this work is dedicated to the construction of a small sensor node. The handover mechanism proposed in this work is called Hand4MAC (handover mechanism for MAC layer). This mechanism is compared with other mechanisms commonly used in handover management. The Hand4MAC mechanism is deployed and validated through by simulation and in a real testbed. The scenarios used for the validation reproduces a hospital ward. The performance evaluation is focused in the percentage of time that senor nodes are accessible to the network while traveling across several access points’ coverage areas and the energy expenditures in handover processes. The experiments performed take into account various parameters that are the following: number of sent messages, number of received messages, multicast message usage, energy consumption, number of sensor nodes present in the scenario, velocity of sensor nodes, and time-to-live value. In both simulation and real testbed, the Hand4MAC mechanism is shown to perform better than all the other handover mechanisms tested. In this comparison it was only considered the most promising handover mechanisms proposed in the literature.
- MobiSensA: Desenvolvimento de uma Aplicação Móvel para a Plataforma iSensAPublication . Silva, José; Fontes, Ricardo; Caldeira, João; Soares, Vasco N. G. J.; Gaspar, Pedro DinisiSensA é um sistema de aquisição de dados inteligentes e plataforma Web para a monitorização e análise de dados, em tempo real, de ambientes e dispositivos numa ampla gama de áreas. A plataforma Web permite a gestão centralizada de instalações, bem como a visualização dos dados em tempo real, análise de histórico e configuração de alarmes e relatórios periódicos. Contudo, para facilitar a monitorização das instalações e a notificação de eventos (anomalias e alertas), surgiu a necessidade de desenvolver uma aplicação móvel para Android, cujo processo de desenvolvimento se apresenta neste artigo.
- Potential for technological modernisation and innovation based on ICT in agri-food companies of central region of PortugalPublication . Gaspar, Pedro Dinis; Soares, Vasco N. G. J.; Caldeira, João; Andrade, Luís P.; Domingues, CláudiaThis paper assesses the potential for technological modernisation and innovation based on Information and Communication Technologies (ICT) in agri-food companies located in the central region of Portugal. The survey was applied to 50 agri-food companies of Cereals, Cheese, Olive oil, Dry sausages, Honey, Wine, and Horticultural sectors. Survey results can be summarised as: The large majority of companies use computers and have Internet service. Most of companies don't have a webpage and neither use Internet for advertising campaigns, selling or buying products. Half of companies use social networks for business purposes. Most companies haven't promoted collaborators training in ICT in the last year. Companies claim that possessing a webpage and attending ICT training will be the technological solutions that will improve their productivity and/or marketing products and services. For each sector, recommendations and suggestions were provided in order to promote the use of ICT for business purposes.
- Detection of Waste Containers Using Computer VisionPublication . Valente, Miguel; Silva, Hélio; Caldeira, João; Soares, Vasco N. G. J.; Gaspar, Pedro DinisThis work is a part of an ongoing study to substitute the identification of waste containers via radio-frequency identification. The purpose of this paper is to propose a method of identification based on computer vision that performs detection using images, video, or real-time video capture to identify different types of waste containers. Compared to the current method of identification, this approach is more agile and does not require as many resources. Two approaches are employed, one using feature detectors/descriptors and other using convolutional neural networks. The former used a vector of locally aggregated descriptors (VLAD); however, it failed to accomplish what was desired. The latter used you only look once (YOLO), a convolutional neural network, and reached an accuracy in the range of 90%, meaning that it correctly identified and classified 90% of the pictures used on the test set.
- ISENSA - Plataforma tecnológica para monitorização inteligentePublication . Caldeira, João; Soares, Vasco N. G. J.; Gaspar, Pedro Dinis; Fontes, RicardoEste artigo apresenta a definição e o desenvolvimento de uma plataforma tecnológica para integração e recolha de informação proveniente de sensores, baseada num controlador Arduino e numa aplicação web suportada por uma base de dados relacional. Trata-se de um sistema de aquisição de dados inteligente, para a monitorização e análise de dados, em tempo real ou de histórico, de ambientes e dispositivos numa ampla gama de áreas. Apresenta elevada flexibilidade na integração de requisitos específicos, que dão resposta às necessidades de diferentes sectores, entidades e utilizadores. Esta plataforma desenvolvida pela empresa InspiringSci, Lda, de acordo com a metodologia ICONIX, está na fase final de teste e validação de conceito em cenários reais, com vista à posterior introdução no mercado.
- Technological modernization and innovation of traditional agri-food companies based on ICT solutionsPublication . Gaspar, Pedro Dinis; Soares, Vasco N.G.J.; Caldeira, João; Andrade, Luís P.; Soares, Cláudia D.This paper assesses the potential for technological modernization and innovation based on Information and Communication Technologies (ICT) in traditional agri-food companies located in the central region of Portugal. A survey was applied to 50 agri-food companies of Cereals, Cheese, Olive oil, Dry sausages, Honey, Wine, and Horticultural sectors. Survey results can be summarized as: The majority of companies use computers and have Internet service. Most of companies do not have a webpage and neither use Internet for advertising campaigns, selling or buying products. Half of companies use social networks for business purposes. Most companies have not promoted the training in ICT of their collaborators in the last year. Companies claim that possessing a webpage and attending ICT training will be the technological solutions that will improve their productivity and/or marketing products and services. For each sector, recommendations and suggestions were provided in order to promote the use of ICT for business purposes. The required ICT solution was developed to a limited set of companies. The main ICT-based solutions developed were company webpages and Facebook pages. A CRM system was developed for one company. A satisfaction survey was carried out at the end of the implementation of the ICT solution. Companies’ managers were highly satisfied with the ICT specific solution developed for its company and they affirmed that the company sales increased due to the web visibility gained by the company products.
- Protótipo para Deteção de Contentores de Resíduos com Recurso a Técnicas de Visão ComputacionalPublication . Valente, Miguel; Silva, Hélio; Caldeira, João; Soares, Vasco; Gaspar, Pedro DinisEste artigo apresenta o desenho e implementação de um protótipo funcional para avaliar e validar a utilização de técnicas de visão computacional, na identificação de contentores de resíduos no contexto de uma cidade inteligente. Este protótipo recorre à utilização de uma rede neuronal convolucional YOLO e de um microcomputador Jetson Nano da Nvidia. Comparativamente ao método atual de identificação de contentores de resíduos por radiofrequência, esta abordagem é mais ágil e diminui os recursos necessários para implementação, contribuindo para poupar nos gastos logísticos e de implementação da gestão inteligente de resíduos.
- Técnicas de Visão Computacional para a Deteção de Contentores de ResíduosPublication . Valente, Miguel; Silva, Hélio; Caldeira, João; Soares, Vasco N. G. J.; Gaspar, Pedro DinisO trabalho apresentado neste artigo resulta de uma investigação preliminar que visa a utilização de técnicas de visão computacional para substituir o método atual de identificação de contentores de resíduos via identificação por radiofrequência. Comparativamente ao método atual, esta abordagem é mais ágil e diminui os recursos necessários para implementação. A abordagem aqui discutida é centrada no uso de redes neuronais convolucionais, especificamente a rede YOLO. Utilizando este método de identificação foi atingido uma precisão de deteção e classificação de 92% dos contentores de resíduos.