10 documents found, page 1 of 1
Magnetic Resonance Sequences: Experimental Assessment of Achievements and Limit...
Furtado, PedroDeep Learning can be applied to learn segmentations of abdominal organs in MRI sequences, a challenging task due to changing morphologies of organs along different slices. Evaluation of outcome is important to decide on applicability and to command further improvements. Software tools include evaluation metrics. Some metrics indicate quasi-perfection, with potential erroneous conclusions, visual inspection and ...
Loss, post-processing and standard architecture improvements of liver deep lear...
Furtado, PedroAs deep learning is increasingly applied to segmentation of organs from Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) sequences, we should understand the importance of certain operations that can improve the quality of results. For segmentation of the liver from those sequences, we quantify the improvement achieved with segmentation network, loss function and post-processing steps. Our results o...
A review of management tools for OpenSimulator
Vicente, Bruno; Sousa, Fernando Pais de; Furtado, Pedro; Faria, João Pascoal; Morgado, LeonelTo host OpenSimulator virtual world servers at educational institutions, system administrators find at their disposal a diversity of web-based management systems with different sets of features. To support the selection among current management tools and provide a baseline from which to identify subsequent development needs, we installed and evaluated 4 of these systems (WiFi pages, OSMW, MWI and jOpenSim), ana...
RobustPathFinder: Handling Uncertainty in Indoor Positioning Techniques
Cecílio, José; Duarte, Karen; Martins, Pedro; Furtado, PedroIndoor navigation technologies rely on accurately determining the position of a moving person or robot to guide her actively through the building. This cannot be done using GPS because it is indoors. We have been dealing with this problem in the context of designing and building a system for helping blind people navigate in public buildings. However, indoor localization based on RSSI is not very accurate, since...
NoSQL Scalability Performance Evaluation over Cassandra
Abbasi, Maryam; Sá, Filipe; Albuquerque, Daniel; Wanzeller, Cristina; Caldeira, Filipe; Tomé, P.; Furtado, Pedro; Martins, PedroThe implementation of Smart-Cities is growing all over the world. From big cities to small villages, information able to provide a better and efficient urban management is collected from multiple sources (sensors). Such information has to be stored, queried, analyzed and displayed, aiming to contribute to a better quality of life for citizens and also a more sustainable environment. In this context it is import...
Planning for Heterogeneous IoT with Time Guaranties
Cecílio, José; Martins, Pedro; Furtado, PedroDistributed IoT Systems with time guaranties need to be carefully dimensioned to provide correct operations timings. In heterogeneous systems, with wired and wireless components, there are many factors that have implications regarding timings. Beside of developing real-time operating systems, IoT platforms for real-time communications need to be carefully dimensioned to provide correct operation timings. In thi...
BCI Framework Based on Games to Teach People With Cognitive and Motor Limitations
Cecílio, José; Andrade, João; Martins, Pedro; Castelo Branco, Miguel; Furtado, PedroNowadays, Human-Computer Interaction (HCI) systems e.g. keyboard, mouse and touch screen are frequently used by anyone. However, those ways to interact with computers may be not suitable for disabled persons. Brain-Computer Interface (BCI) is an HCI system which can be used as an alternative for these persons. This approach allows operating a computer using only the brain signals, for instance, imagine a situat...
Tools For Interactive Learning And Self-Management Of Diabetes
Capelo, Rita; Baptista, Carla; Figueiredo, Júlia; Carrilho, Francisco; Furtado, PedroDiabetes is a widespread disease and its control is dependent upon the patient. Although there is no permanent cure for diabetes, there are several available treatments which, when followed regularly, allow the patient to have a good quality of life. Patient education, especially about eating habits, is key to keep glucose levels stable both in the short and in the long term. This should include nutritional cou...
Information and Assisted Navigation System for Blind People
Duarte, Karen; Cecílio, José; Silva, Jorge Sá; Furtado, PedroNowadays public buildings are changing constantly, often people have to take different routes to reach known destinations. At the same time, new services and places are made available to attract more people to the shopping center. This dynamic environment is usually signalled and labelled with visual marks and signs which are not appropriated for blind persons. Therefore, blind users are unintentionally deprive...
Which NoSQL Database? A Performance Overview
Abramova, Veronika; Bernardino, Jorge; Furtado, PedroNoSQL data stores are widely used to store and retrieve possibly large amounts of data, typically in a key-value format. There are many NoSQL types with different performances, and thus it is important to compare them in terms of performance and verify how the performance is related to the database type. In this paper, we evaluate five most popular NoSQL databases: Cassandra, HBase, MongoDB, OrientDB and Redis....