Browsing by Author "Bona, Daniel Dezan de"
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- Development of a system to monitor surfer’s balance and plantar pressure and surfboard’s movementPublication . Bona, Daniel Dezan de; Marques, Maria Arcelina; Correia, Miguel VelhoteO uso da tecnologia tem crescido nas últimas décadas nas mais diversas áreas, seja na indústria ou no dia-a-dia, e é cada vez mais evidente os benefícios que traz. No desporto não é diferente. Cada dia surgem novos desenvolvimentos objetivando a melhoria do desempenho dos praticantes de atividades físicas, possibilitando atingir resultados nunca antes pensados. Além disto, a utilização da tecnologia no desporto permite a obtenção de dados biomecânicos que podem ser utilizados tanto no treinamento quando na melhoria da qualidade de vida dos atletas auxiliando na prevenção de lesões, por exemplo. Deste modo, o presente projeto se aplica na área do desporto, nomeadamente, na modalidade do surfe, onde a ausência de trabalhos científicos ainda é elevada, aliando a tecnologia eletrônica ao desporto para quantificar informações até então desconhecidas. Três fatores básicos de desempenho foram levantados, sendo eles: equilíbrio, posicionamento dos pés e movimentação da prancha de surfe. Estes fatores levaram ao desenvolvimento de um sistema capaz de medi-los dinamicamente através da medição das forças plantares e da rotação da prancha de surfe. Além da medição dos fatores, o sistema é capaz de armazenar os dados adquiridos localmente através de um cartão de memória, para posterior análise; e também enviá-los através de uma comunicação sem fio, permitindo a visualização do centro de pressões plantares; dos ângulos de rotação da prancha de surfe; e da ativação dos sensores; em tempo real. O dispositivo consiste em um sistema eletrônico embarcado composto por um microcontrolador ATMEGA1280; um circuito de aquisição e condicionamento de sinal analógico; uma central inercial; um módulo de comunicação sem fio RN131; e um conjunto de sensores de força Flexiforce. O firmware embarcado foi desenvolvido em linguagem C. O software Matlab foi utilizado para receção de dados e visualização em tempo real. Os testes realizados demostraram que o funcionamento do sistema atende aos requisitos propostos, fornecendo informação acerca do equilíbrio, através do centro de pressões; do posicionamento dos pés, através da distribuição das pressões plantares; e do movimento da prancha nos eixos pitch e roll, através da central inercial. O erro médio de medição de força verificado foi de -0.0012 ± 0.0064 N, enquanto a mínima distância alcançada na transmissão sem fios foi de 100 m. A potência medida do sistema foi de 330 mW.
- Instrumentation of a Surfboard to Evaluate Surfing PerformancePublication . Bona, Daniel Dezan de; Marques, Maria Arcelina; Correia, Miguel V.This paper reports the development of a system to instrument a surfboard aiming to evaluate wave riding performance. According to the research only 3.8% - 5% of the total surfing time corresponds to the wave riding movements, despite of been the surfing goal. The system developed collects the data from twenty four force sensors positioned beneath the surfer’s feet using a microcontroller ATMEGA1280, and determines the surfer’s feet positioning and Centre of Pressure (CoP). Furthermore, an Inertial Measurement Unit (IMU) with an ADXL335 accelerometer and an IDG500 gyroscope provides information of the surfboard’s position in relation to the gravity force axis. To store the result of the acquisitions a SD Card is used. To transmit the data to an external device such as a computer, a WI-FI module complete the electronic system. A battery management was used to allow the system to work remotely. This work presents an overview of the parameter recognized in literature as influencing athlete’s performance and a brief description of the major manoeuvres in competition to figure out the parameters to be measured likewise the system developed. Preliminary tests with five different setups have shown that the force sensors to measure CoP and the electronic circuit board works properly.
- Monitoring of plantar forces and surfboard’s movement: alternative to understand the injuries mechanismPublication . Bona, Daniel Dezan de; Marques, Maria Arcelina; Borgonovo-Santos, Márcio; Correia, Miguel VelhoteThe concern about injuries in sport are evident due to the implications it carries. To have the knowledge of the mechanisms of injuries is important either to prevent and recovery. This context generates the appropriate scenario to develop an electronic solution to measure dynamically the Center of Pressure (CoP) and surfboard’s movement and support the understanding of the mechanisms responsible for the occurrence of injuries. Two matrices composed by 24 force sensors and Inertial Measurement Unit (IMU) controlled by ATEMEGA1280 microcontroller were developed. This system was tested using a dynamic protocol using one unstable structure at the bottom of the surfboard. The results have shown that the CoP displacement was largest during the tests that presented great rotation changes. Furthermore, the power oscillations were greater during transition moments. The proposed system is able to measure biomechanical variables dynamically, i.e., force, and surfboard’s angle pitch and roll. This report reviews the surf injuries in literature and describes the electronic device used beyond to present the results of the tests performed.
- Remote laboratory: Application and usabilityPublication . Schlichting, Luis C. M.; Ferreira, Golberi de S.; Bona, Daniel Dezan de; Faveri, Flávio de; Anderson, José A.; Alves, Gustavo R.The practice and the hands-on are essential for technical and professionals skills, even in controlled situations. Due to that, the use of laboratories during the learning process is fundamental, although it has been more difficult to support such kind of infrastructure locally, which brings the challenge to find alternatives. On the other hand, the Brazilian law establishes that higher education institutions can offer a complete curricula or a part of the curricula by using E-learning, what builds a scenario to use remote laboratories. This work presents the alternatives for the use of remote laboratories, showing that this idea can be spread and applied in different technical areas allowing students and professors to accomplish experiments in a safe and flexible environment trough the internet in real remote laboratories. This work also shows preliminary discussions of a first experiment with technical high school students using remote laboratories.
- Spreading remote lab usage: A system — A community — A FederationPublication . Alves, Gustavo R.; Fidalgo, André Vaz; Marques, Arcelina; Viegas, Clara; Felgueiras, Carlos; Costa, Ricardo; Lima, Natercia; Castro, Manuel; Diaz-Orueta, Gabriel; Ruiz, Elio San Cristobal; Garcia-Loro, Felix; Garcia-Zubia, Javier; Hernandez-Jayo, Unai; Kulesza, Wlodek; Gustavsson, Ingvar; Pester, Andreas; Zutin, Danilo; Schlichting, Luis; Ferreira, Golberi; Bona, Daniel Dezan de; Silva, Juarez B. da; Alves, Joao B.; Bilessimo, Simone; Pavani, Ana; Lima, Delberis; Temporao, Guilherme; Marchisio, Susana; Concari, Sonia; Lerro, Federico; Fernandez, Ruben; Paz, Hector; Soria, Fernando; Almeida, Nival; Oliveira, Vanderli de; Pozzo, Maria I.; Dobboletta, ElsaExperiments have been at the heart of scientific development and education for centuries. From the outburst of Information and Communication Technologies, virtual and remote labs have added to hands-on labs a new conception of practical experience, especially in Science, Technology, Engineering and Mathematics education. This paper aims at describing the features of a remote lab named Virtual Instruments System in Reality, embedded in a community of practice and forming the spearhead of a federation of remote labs. More particularly, it discusses the advantages and disadvantages of remote labs over virtual labs as regards to scalability constraints and development and maintenance costs. Finally, it describes an actual implementation in an international community of practice of engineering schools forming the embryo of a first world wide federation of Virtual Instruments System in Reality nodes, under the framework of a project funded by the Erasmus+ Program.