26 documents found, page 1 of 3
Modelling of a vibration robot using localization ground truth assisted by aruc...
Matos, Diogo; Lima, José; Rohrich, Ronnier Frates; Oliveira, Andre Schneider; Valente, António; Costa, Pedro; Costa, Paulo Gomes daSimulators have been increasingly used on development and tests on several areas. They allow to speed up the development without damage and no extra costs. On realistic simulators, where kinematics play an important role, the modelling process should be imported for each component to be accurately simulated. Some robots are not yet modelled, as for example the Monera. This paper presents a model of a small vibr...
Multi-robot coordination for a heterogeneous fleet of robots
Pereira, Diogo; Matos, Diogo; Rebelo, Paulo; Ribeiro, Fillipe; Costa, Pedro; Lima, JoséThere is an increasing need for autonomous mobile robots (AMRs) in industrial environments. The capability of autonomous movement and transportation of items in industrial environments provides a significant increase in productivity and efficiency. This need, coupled with the possibility of controlling groups of heterogeneous robots, simultaneously addresses a wide range of tasks with different characteristics ...
Early Clinical Outcomes of the Preserflo Microshunt Device
Correia Barão, Rafael; Barata, André; José, Patrícia; Matos, Diogo; Gomes, Pedro; Peschiera, Riccardo; Abegão Pinto, LuísINTRODUCTION: The purpose of this study was to assess the efficacy and safety profile of the Preserflo® Microshunt device, which is an ab externo sub-Tenon’s aqueous shunt approved for the surgical treatment of glaucoma, METHODS: Retrospective single-center observational study. Patients who underwent stan- dalone or combined phacoemulsification-Preserflo® Microshunt implantation with a minimum of 3 months of po...
Availability heuristic and reversals following large stock price changes: Evide...
Matos, Diogo; Lobão, Júlio; Pacheco, Luís MiguelThis paper examines if investors exhibited evidence of the availability heuristic in their investment decisions when significant price changes occurred in the British stock market during the 2010–2018 period. We raise the hypothesis that if a significant stock price move takes place on a day when the stock market index also undergoes a significant change (either positive or negative), then the magnitude of that...
Multi AGV coordination tolerant to communication failures
Matos, Diogo; Costa, Pedro; Lima, José; Costa, Paulo Gomes daMost path planning algorithms used presently in multi-robot systems are based on offline planning. The Timed Enhanced A* (TEA*) algorithm gives the possibility of planning in real time, rather than planning in advance, by using a temporal estimation of the robot’s positions at any given time. In this article, the implementation of a control system for multi-robot applications that operate in environments where ...
Multiple mobile robots scheduling based on simulated annealing algorithm
Matos, Diogo; Costa, Pedro; Lima, José; Valente, AntónioTask Scheduling assumes an integral topic in the efficiency of multiple mobile robots systems and is a key part in most modern manufacturing systems. Advances in the field of combinatorial optimisation have allowed the implementation of algorithms capable of solving the different variants of the vehicle routing problem in relation to different objectives. However few of this approaches are capable of taking int...
Multi AGV industrial supervisory system
Cruz, Ana Luísa Sampaio; Matos, Diogo; Lima, José; Costa, Paulo Gomes da; Costa, PedroAutomated guided vehicles (AGV) represent a key element in industries’ intralogistics and the use of AGV fleets bring multiple advantages. Nevertheless, coordinating a fleet of AGV is already a complex task but when exposed to delays in the trajectory and communication faults it can represent a threat, compromising the safety, productivity and efficiency of these systems. Concerning this matter, trajectory plan...
Stock Market Series Analysis Using Self-Organizing Maps
Matos, Diogo; Marques, Nuno C.; Cardoso, Margarida G. M. S.In this work a new clustering technique is implemented and tested. The proposed approach is based on the application of a SOM (self-organizing map) neural network and provides means to cluster U-MAT aggregated data. It relies on a flooding algorithm operating on the U-MAT and resorts to the Calinski and Harabask index to assess the depth of flooding, providing an adequate number of clusters. The method is tuned...
Therapy adherence in community elderly from inner and coast councils of Norther...
Pinto, Isabel C.; Nascimento, Luís; Chã, Ana; Moura, Armando; Matos, Diogo; Frade, MagdaGlobal aging associated with chronic comorbidities leads to increased simultaneous use of drugs and complex drug therapies. Therapy adherence is essential to ensure the effectiveness of therapeutic and control of chronic diseases in elderly. Objectives: To estimate the prevalence of therapy adherence and associated factors in community elderly from inner and coast councils of northern Portugal. Methods: This cr...
SUPERIORLY BASED NASOLABIAL TRANSPOSITION FLAPFUNDAMENTALS
Matos, Diogo; Goulão, JoãoThe nasolabial transposition flap, when performed with a superiorly placed pedicle, has multiple indications in mid-face surgical reconstruction. Apart from its primary indication in nasal ala reconstruction, the nasolabial transposition flap is an alternative for all the nasal subunits, except for the upper third ones. The nasal tip and full-thickness defects of the nasal ala are not exceptions. Moreover, it c...