Navegando por Assunto "Dispositivos móveis"

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Acesso aberto (Open Access)
Metodologia ativa com uso de dispositivos móveis no ensino superior: propostas didáticas para o ensino de língua espanhola
(Universidade Federal do Pará, 2020-09-17) BARROS, Anne Leticia de Sousa Cipriano; SEIXAS, Netília Silva dos Anjos; http://lattes.cnpq.br/2301685130625189
Acesso aberto (Open Access)
Sistema fuzzy para dispositivo móvel de dual-interface com conexão simultânea em redes heterogêneas sem fio.
(Universidade Federal do Pará, 2023-09-26) SILVA, Fábio Pereira Ferreira da; FERREIRA JÚNIOR, José Jailton Henrique; http://lattes.cnpq.br/9031636126268760; FRANCÊS, Carlos Renato Lisboa; http://lattes.cnpq.br/7458287841862567
Over the years, it is possible to see an exponential growth of heterogeneous wireless networks. This is due to advances in wireless communication technologies. Managing the quality of service is essential to address the needs of issues related to vertical handover issues where mobile devices need a seamless migration. Hence, the challenges of obtaining a good quality of experience for network users. This work presents an evaluation of the quality and performance of a mobile device with dual-interface, using the Fuzzy system, to provide the best conditions for simultaneous connections. In order to help in the best choice of heterogeneous networks available. The Network Simulator and evalvid were the validation tools used to analyze and obtain the results. The results obtained were satisfactory. Due to the dual-interface mobile device with the application of the Fuzzy system, it was able to choose the best available networks and obtain twice the performance in using the flow compared to traditional mobile devices (by simultaneously using the two interfaces of different technologies) . Ensuring a transparent migration, especially in real-time multimedia applications, where connection loss is of paramount importance.
Acesso aberto (Open Access)
Validação de dispositivos móveis para avaliação de ajustes posturais antecipatórios e compensatórios
(Universidade Federal do Pará, 2021-12-09) DUARTE, Manuela Brito; CALLEGARI, Bianca; http://lattes.cnpq.br/0881363487176703; https://orcid.org/0000-0001-9151-3896
Article 1: Postural adjustments are triggered by the central nervous system in response to external disturbances and consist of anticipatory (APAs) or compensatory (CPAs) adjustments. APAs are muscle recruitment, associated or not with the displacement of the Center of Pressure, in advance of predictable disturbances. CPAs, on the other hand, are generated as a result of the imbalance, after the disturbance. Currently, the study of APA and CPA is restricted to research laboratories due to the need for specific equipment, difficult to handle and high cost. The objective of this project was to validate a mobile application (Momentum) for the evaluation of APAs and CPAs. Healthy young people were subjected to a predictable external disturbance produced by the impact of a pendulum. We used gold standard equipment to compare the results obtained by Momentum. Validation results, APA latency (APAonset), maximum peak (ACCpeaktime) and acceleration variation (ACCpeak) after impact and time to peak (ACCpeak) were the parameters that showed the strongest correlation indices. (r). In terms of reliability, Momentum had a very high correlation in APAonset and APAamp. In the CPA, only the ACCrange had an excellent correlation, the other parameters presented a reasonable to high correlation. In general, Momentum proved to be valid and reliable for evaluating APAs and CPAs. Article 2: New technologies mainly in the sports environment where performance and competitive power are essential, the use of inertial sensors for analysis and evaluation in sports stands out, as long as they are reliable to the gold standard evaluation equipment. The objective of this article was to validate the acceleration signals of the center of mass (COM) in the anticipatory and compensatory phase of the disturbance comparing the two equipments (Metamotion C and kinematics). Twenty healthy young men were exposed to the pendulum paradigm, which consisted of predictable anteroposterior disturbances provoked at the level of the shoulders. The validation results showed a significant linear correlation of all variables from moderate to large with r ≥ 0.5. Reliability between kinematics sessions was excellent (≥0.75). The APAonset variable presented a reasonable to high ICC, while the CPAtime showed an excellent correlation. The results show that Metamotion C proved to be reliable and valid in measuring COM acceleration in both APA and CPA.