Data analytics for data variety

A internet fez com que os gestores das organizações tivessem acesso a grandes quantidades de dados e esses dados são apresentados em diferentes formatos, em concreto, estruturados, semiestruturados e não estruturados. Esta variedade de dados é essencialmente proveniente das redes sociais, mas não só, também são provenientes da Internet of Things. Verifica-se para os dados estruturados que existem técnicas validadas, estudadas e maduras, mas para os outros tipos de dados, ou seja, semiestruturados e não estruturados tal já não se verifica. Neste poster, é apresentado um conjunto de técnicas de análise de dados para os dados semiestruturados e não estruturados, utilizando como principal bibliografia conferências de investigação na área de análise de dados.Through the Internet, the organizations managers had access to massive amounts of data and these data are presented in different formats, namely, structured, semi-structured and unstructured. These variety of data is essentially generated from social networks, but not only, they also are generated from the Internet of Things, from machines, sensors, among others. While the structured data has techniques well studied, mature and validated, otherwise the other types of techniques, semi-structured and unstructured, this is no longer true. In this poster, a set of data analysis techniques is presented for the semi-structured and unstructured data by using as main bibliography data analytics conferences.(undefined)info:eu-repo/semantics/publishedVersio

Comparação electromiográfica do passe e do remate em Futsal

Foi objectivo deste trabalho comparar a actividade neuromuscular do membro inferior na execução do remate e do passe com o dorso do pé no Futsal. Estudaram-se 5 sujeitos do sexo masculino e federados com idades compreendidas entre os 20 e os 26 anos. Foram analisadas duas condições de execução: o passe e o remate. O passe foi efectuado para um jogador colocado à sua frente e a seis metros de distância. O remate foi efectuado a uma distância de seis metros com oposição de um guarda-redes. Os dados electromiográficos foram recolhidos através de eléctrodos bipolares pré-amplificados colocados no Vasto interno, Vasto externo, Gastrocnémio medial e Tibial anterior com uma frequência de aquisição de 1 kHz. O sinal foi processado digitalmente, a fim de se obter o valor quadrático médio (RMS). A RMS foi normalizada individualmente com base no valor máximo dentro de uma determinada condição de exercitação. Um electrogoniómetro foi colocado entre a perna e a coxa para determinação dos parâmetros cinemáticos. A frequência de aquisição foi de 1 kHz e os dados estavam sincronizados com o sinal electromiográfico. Foram avaliados o ângulo relativo mínimo entre a perna e a coxa, assim como, o valor máximo da velocidade angular entre a perna e coxa. A velocidade foi significativamente superior e o ângulo significativamente inferior no remate do que no passe. A actividade neuromuscular foi significativamente superior no remate do que no passe em todos os grupos musculares estudados

Kinematical and neuromuscular assessment of the rowing exercise in the upright position with barbell to improve muscle strength and muscle endurance in group fitness classes

The aim was to assess the interaction between kinematics and neuromuscular responses of subjects performing the rowing exercise with barbell in group fitness classes with different external loads and cadences. Fifteen male subjects performed nine sets of nine repetitions of the selected exercise. Sets were composed by a pair wise combination of different external loads (5, 10 and 20 [kg]) and cadences (1, 2 and 4 musical beats) in a randomized order. Kinematical data was collected with an electrogoniometer and it was assessed the: (i) absolute duration of each exercise repetition; (ii) minimum relative angle between the arm and forearm during the flexion action. Neuromuscular data was collected with superficial electromyography and it was computed the EMG amplitude (aEMG), the EMG room mean square (RMS) and the activation time of five muscles from the arm and trunk. Increasing cadence decreased the absolute duration of the exercise cycle. There was no significant interaction between the joint angle and the external load nor the cadence. Increases in the external load and in the cadence imposed a RMS increase as well. It was also verified a significant interaction among the aEMG and the external load in the four muscle groups

Flexural strengthening of RC slabs with prestressed CFRP strips: serviceability and ultimate load state behavior

O presente trabalho pretende contribuir para o conhecimento da técnica EBR (Externally Bonded Reinforcement) usando laminados de CFRP (Carbon Fiber-Reinforced Polymer) pré-esforçados no reforço à flexão de estruturas de betão, sob condições de serviço (SLS) e estado limite último (ULS). Para tal, foi desenvolvido um programa experimental composto por 8 lajes ensaiadas até à rotura. Duas lajes foram usadas como de referência; 5 reforçadas com laminados de EBR/CFRP pré-esforçados; finalmente, 1 laje reforçada com um laminado EBR/CFRP. Dois sistemas distintos de ancoragem foram estudados: MA (Mechanical Anchorage) e GA (Gradient Anchorage). O efeito da largura e espessura do laminado foi também estudado. A performance dos protótipos é criticamente analisada ao nível dos SLS e ULS.The present work intends to contribute to the knowledge of Externally Bonded Reinforcement (EBR) technique using prestressed Carbon Fiber-Reinforced Polymer laminates (CFRP) to strengthen concrete structures in flexure, at both serviceability (SLS) and ultimate load levels (ULS). For that purpose, an experimental program was carried out with 8 slabs monotonically tested under displacement control up to failure. Two slabs were used as reference specimens (unstrengthened); 5 slabs were strengthened with prestressed EBR CFRP laminates; finally, 1 slab was strengthened EBR CFRP laminates without being prestressed. To fix the ends of the prestressed CFRP laminates two different anchorage systems were used: Mechanical Anchorage (MA) and Gradient Anchorage (GA). The effect of the width and thickness of the CFRP laminate were also studied. The observed performance of the tested slabs is critically analyzed in terms of SLS and ULS aspects

Kinematical and neuromuscular assessment of the rowing exercise in the upright position with barbell to improve muscle strength and muscle endurance in group fitness classes

The aim was to assess the interaction between kinematics and neuromuscular responses of subjects performing the rowing exercise with barbell in group fitness classes with different external loads and cadences. Fifteen male subjects performed nine sets of nine repetitions of the selected exercise. Sets were composed by a pair wise combination of different external loads (5, 10 and 20 [kg]) and cadences (1, 2 and 4 musical beats) in a randomized order. Kinematical data was collected with an electrogoniometer and it was assessed the: (i) absolute duration of each exercise repetition; (ii) minimum relative angle between the arm and forearm during the flexion action. Neuromuscular data was collected with superficial electromyography and it was computed the EMG amplitude (aEMG), the EMG room mean square (RMS) and the activation time of five muscles from the arm and trunk. Increasing cadence decreased the absolute duration of the exercise cycle. There was no significant interaction between the joint angle and the external load nor the cadence. Increases in the external load and in the cadence imposed a RMS increase as well. It was also verified a significant interaction among the aEMG and the external load in the four muscle groups

Flexural strengthening of RC slabs with prestressed CFRP strips using different anchorage systems

In the field of flexural strengthening of concrete structures the Externally Bonded Reinforcement (EBR) technique using carbon fiber-reinforced polymers (CFRP) is commonly used. This technique offers several structural advantages when the CFRP material is prestressed. One of the critical aspects of a prestressing technique is the type of end anchorage. Two systems are investigated in the present paper: the metallic anchorage elements fixed to the ends of the FRP reinforcement and the gradient anchorage. In order to assess the performance of these two systems, an experimental program was carried out. In addition to the anchorage systems, the cross-section geometry of the CFRP strip was also included in this study. Eight slabs were monotonically tested under displacement control up to failure by using a four-point bending test configuration. The observed performance of the tested slabs is critically analyzed.Fundação para a Ciência e a Tecnologia (FCT

Abscisic Acid (ABA) Regulation of Arabidopsis SR Protein Gene Expression

Serine/arginine-rich (SR) proteins are major modulators of alternative splicing, a key generator of proteomic diversity and flexible means of regulating gene expression likely to be crucial in plant environmental responses. Indeed, mounting evidence implicates splicing factors in signal transduction of the abscisic acid (ABA) phytohormone, which plays pivotal roles in the response to various abiotic stresses. Using real-time RT-qPCR, we analyzed total steady-state transcript levels of the 18 SR and two SR-like genes from Arabidopsis thaliana in seedlings treated with ABA and in genetic backgrounds with altered expression of the ABA-biosynthesis ABA2 and the ABA-signaling ABI1 and ABI4 genes. We also searched for ABA-responsive cis elements in the upstream regions of the 20 genes. We found that members of the plant-specific SC35-Like (SCL) Arabidopsis SR protein subfamily are distinctively responsive to exogenous ABA, while the expression of seven SR and SR-related genes is affected by alterations in key components of the ABA pathway. Finally, despite pervasiveness of established ABA-responsive promoter elements in Arabidopsis SR and SR-like genes, their expression is likely governed by additional, yet unidentified cis-acting elements. Overall, this study pinpoints SR34, SR34b, SCL30a, SCL28, SCL33, RS40, SR45 and SR45a as promising candidates for involvement in ABA-mediated stress responses.FCT PostDoctoral Fellowships: SFRH/BPD/80073/2011, SFRH/BPD/81830/2011

Autonomous acoustic surveillance system for nearshore soundscaping

In response to global climate change and growing industry capabilities, researchers are looking for robust and soft engineered solutions for nearshore ecosystems. A newly developed Multifunctional Artificial Reef is capable of performing several functions within one structure, among which is marine ecosystem restoration and the support for various sensors for structural and environmental monitoring. Combining such functionalities, implementation of passive acoustic shows great potential for biodiversity monitoring and colonization process observation of recently deployed artificial structure. Therefore, by integrating moored hydrophone within the artificial reef system and setting recording mode as well as post processing optimization, peculiar features of local marine habitat behaviour will be researched in order to provide better insight on the contribution of these structures for ecosystems preservation

Reforço à flexão de lajes de betão armado com laminados de CFRP pré-esforçados : comportamento em estado limite último e de utilização

No contexto do reforço estrutural à flexão com recurso aos laminados de CFRP (Carbon Fiber-Reinforced Polymers), a técnica EBR (Externally Bonded Reinforcement) é frequentemente utilizada. A aplicação de CFRP pré-esforçados acumula as vantagens da técnica EBR com as do pré-esforço externo. O sistema de ancoragem desempenha um papel fundamental nos sistemas de reforço com laminados de CFRP pré-esforçados. Por esta razão, neste trabalho desenvolveu-se um programa experimental, composto por 8 lajes de betão armado, com o principal objetivo de analisar dois sistemas de ancoragem: (i) ancoragem metálica e (ii) ancoragem do gradiente de força. Além dos sistemas de ancoragem, foi também analisada a influência da geometria do laminado de CFRP. Através dos resultados obtidos verificou-se uma melhoria do comportamento das lajes pré-esforçadas ao nível do estado limite último e de utilização

Preliminary attempt to develop a path-flow analysis model for swimming performance in children

The goal of competitive swimming is to travel the event distance as fast as possible. The identification of the parameters that predict swimming performances is one of the main aims of the swimming “science” community. Indeed, it is consensual that biomechanical and energetic variables are determinant for performance in this sport. Several research groups dedicate their attention to the relationships establish between biomechanical and energetic variables on adult swimmers, with special emphasis on elite adult swimmers