Foraminíferos, ostracodes e microfauna associada da plataforma continental equatorial norte-rio-grandense, NE Brasil: área Porto do Mangue a Galinhos

This study was conducted in the adjacent Brazilian equatorial inner shelf to Rio Grande do Norte, between the region of Porto do Mangue and Galinhos. The main objective is the characterization of biogenic sediments, especially foraminifera and ostracod collected on the surface of the seafloor. The methodology involved standard procedures including literature, surveys, processing of samples in the laboratory and identification of foraminifera and ostracods by genera or species under stereo microscopy and scanning electron microscopy (SEM). Multivariate statistical analyzes and study of ecological indexes were also applied to the study of foraminifera. Three transects, from inner shelf to slope were sampled: profile 01 (east, near Galos), profile 02 (center, near the city of Macau) and profile 03 (west, near Ponta do Mel). Results indicated the predominance of benthic foraminifera and little plankton occurrence. Benthic foraminifera genera observed in abundance were Quinqueloculina, Textularia, Globigerina and Pyrgo, Quinqueloculina, Textularia, Pyrgo, Ammonia, Elphidium, Pseudononion, Peneroplis, Bolivina and Poroeponides, occurred more frequently. Less frequently been described Amphistegina, Archaias, Bigenerina, Cibicides, Cassidulina, Amphicorina, Cornuspira, Paterina, Hopkunsina, Oolina, Uvigerina, Fusenkoina, Nonionella, Amphisorus, Wiesrella, Reussella, Reophax, Nodosaria, Marginulina and Cyclogyra. Six genera of ostracods were also identified: Puriana variabilis / P. convoluted?, Loxoconcha sp, Bairdiidae, Xestoleberis sp, Hemicytheridae and Ruggiericythere sp. Groups of organisms found in the studied shelf presented chemical composition of Ca, C, O, Na, Cl, Al, Mg, and Si. The proportions of chemical elements may vary according to the type of biogenic sediment, with the highest values identified as Ca, C, Cl, Na and O. The absolute dating by carbon 14 method indicated sediments of different colors (light and dark), correspond to a single age from 3000 to 6000 years BP, related to the Quaternary. These data intend to complement information about biogenic sediments in the Brazilian continental shelf, especially in the Northeast, where there is a lack of such studies.

Análise de sedimentos associados à atividade de perfuração na plataforma continental externa, Bacia Potiguar - Brasil

This study was developed in an area located on the outer shelf in the Potiguar Basin, Brazilian equatorial margin; this tropical shelf represents a modern, highly dynamic mixed carbonate-siliciclastic system. Field sampling was carried out during 3 cruises surrounding a shallow-water exploratory well to compare sediment properties of the seafloor, including grainsize, texture, mineral composition, carbonate content, and organic matter. Cruise 1 (C1) was carried prior to drilling, while Cruise 2(C2) and 3 (C3) respectivelly 3 and 12 months after drilling. The sample grid used had 16 stations located along 4 radials from 50 m the well up to a distance of 500 m. Sediments were analyzed in the first 0-2 cm, and 0-10 cm layers. The results show that sedimentary cover around the well is poor to very poorly sorted, with the particle size predominantly in the medium to coarse sand fraction, followed by gravel and mud. The content of calcium carbonate is greater than 96%, associated to bioclastic sediments, and the content of organic matter is less than 12%. Only minor sedimentological variations occured in the area affected by drilling operations. Mainly observed during the second cruise, in terms of a change in grain size distribution associated to an increase in siliciclastic content, This impact occurred in the most surficial sediment (0-2 cm), in the radial closest to the well (50 m), and could suggest the effects of drilling. However, in the third cruise, one year after drilling, the sediments return to show the same characteristics as in the first cruise. These results show no significant sedimentological variations due to drilling activity, and indicate that ocean dynamics in this area was high enough to recover the environment original characteristics.

Análise de sedimentos associados à atividade de perfuração na plataforma continental externa, Bacia Potiguar - Brasil

This study was developed in an area located on the outer shelf in the Potiguar Basin, Brazilian equatorial margin; this tropical shelf represents a modern, highly dynamic mixed carbonate-siliciclastic system. Field sampling was carried out during 3 cruises surrounding a shallow-water exploratory well to compare sediment properties of the seafloor, including grainsize, texture, mineral composition, carbonate content, and organic matter. Cruise 1 (C1) was carried prior to drilling, while Cruise 2(C2) and 3 (C3) respectivelly 3 and 12 months after drilling. The sample grid used had 16 stations located along 4 radials from 50 m the well up to a distance of 500 m. Sediments were analyzed in the first 0-2 cm, and 0-10 cm layers. The results show that sedimentary cover around the well is poor to very poorly sorted, with the particle size predominantly in the medium to coarse sand fraction, followed by gravel and mud. The content of calcium carbonate is greater than 96%, associated to bioclastic sediments, and the content of organic matter is less than 12%. Only minor sedimentological variations occured in the area affected by drilling operations. Mainly observed during the second cruise, in terms of a change in grain size distribution associated to an increase in siliciclastic content, This impact occurred in the most surficial sediment (0-2 cm), in the radial closest to the well (50 m), and could suggest the effects of drilling. However, in the third cruise, one year after drilling, the sediments return to show the same characteristics as in the first cruise. These results show no significant sedimentological variations due to drilling activity, and indicate that ocean dynamics in this area was high enough to recover the environment original characteristics.

Foraminíferos como ferramenta de estudo na geologia ambiental do estuário do Rio Potengi e da plataforma interna, RN, Brasil

The Potengi River estuary has been affected by various anthropogenic factors over the years, as periodic dredging, industrial and domestic waste, traffic and other factors, causing various environmental disasters, including the notorious ecological accident in July 2007, which covered the municipalities of São Gonçalo do Amarante, Macaíba and Natal. Foraminifera serve as viable study tools in these environments; they are able to identify ecologically stressed environments, pointing out hydrographic changes and depositional environments in estuaries. The necessity to check the differences in environmental gradients in places anthropically impacted in Potengi River and adjacent inner shelf through species of foraminifera, and, the responses of these organisms to physical, chemical and geological factors is to provide baseline in the diagnosis of environments. The results show the dominance of opportunistic Ammonia tepida, Bolivina striatula, Quinqueloculina patagonica and Q. miletti especially in regions close to shrimp farms and Baldo Channel sewage in fine grain environments; and Q. lamarckiana indicates penetration of the saline waters in Potengi River. The occurrence of low-salinity tolerant foraminiferal species typical of mangrove environments as Trochammina inflata and T. squamata in Potengi River Channel suggest they probably could have been transported from mangrove area near the Potengi river mouth to the inner shelf regions. These findings suggest Potengi River is able to export mixohaline and mangrove organisms to inner shelf. Two distinct environments were observed, the outermost area is more influenced by marine influence and the innermost area is less influenced. Calcareous and agglutinated species dominate Potengi River, while mouth and inner shelf areas are dominated by calcareous, agglutinated and porcelaneous species, which are typical of highly saline and hydrodynamic environments and the contributive factors that controls foraminiferal distribution were balance of marine and freshwater currents, grain size, availability of CaCO3 and organic matter.

Foraminíferos como ferramenta de estudo na geologia ambiental do estuário do Rio Potengi e da plataforma interna, RN, Brasil

The Potengi River estuary has been affected by various anthropogenic factors over the years, as periodic dredging, industrial and domestic waste, traffic and other factors, causing various environmental disasters, including the notorious ecological accident in July 2007, which covered the municipalities of São Gonçalo do Amarante, Macaíba and Natal. Foraminifera serve as viable study tools in these environments; they are able to identify ecologically stressed environments, pointing out hydrographic changes and depositional environments in estuaries. The necessity to check the differences in environmental gradients in places anthropically impacted in Potengi River and adjacent inner shelf through species of foraminifera, and, the responses of these organisms to physical, chemical and geological factors is to provide baseline in the diagnosis of environments. The results show the dominance of opportunistic Ammonia tepida, Bolivina striatula, Quinqueloculina patagonica and Q. miletti especially in regions close to shrimp farms and Baldo Channel sewage in fine grain environments; and Q. lamarckiana indicates penetration of the saline waters in Potengi River. The occurrence of low-salinity tolerant foraminiferal species typical of mangrove environments as Trochammina inflata and T. squamata in Potengi River Channel suggest they probably could have been transported from mangrove area near the Potengi river mouth to the inner shelf regions. These findings suggest Potengi River is able to export mixohaline and mangrove organisms to inner shelf. Two distinct environments were observed, the outermost area is more influenced by marine influence and the innermost area is less influenced. Calcareous and agglutinated species dominate Potengi River, while mouth and inner shelf areas are dominated by calcareous, agglutinated and porcelaneous species, which are typical of highly saline and hydrodynamic environments and the contributive factors that controls foraminiferal distribution were balance of marine and freshwater currents, grain size, availability of CaCO3 and organic matter.

Efeitos imediatos da plataforma vibratória no desempenho neuromuscular do quadríceps femoral, após reconstrução do LCA: ensaio controlado, randomizado e cego

Objective: to investigate the immediate effect of the vibrating platform on the neuromuscular performance of the quadriceps femoris and on the postural oscillation of subjects submitted to Anterior Cruciate Ligament (ACL) reconstruction. Materials and methods: this study is a randomized and blind clinical trial. Forty-four male volunteers (average age of 27,4 ±6,2 IMC of 26,85± 3,8 Kg/m² and post surgery timeframe of 17± 1,4 weeks) were randomized into two groups: OFF platform (n=22, protocol of exercise over the vibrating platform off) and ON platform (n=22 protocol of exercise over the vibrating platform on, 50Hz frequency and 4mm of amplitude). All volunteers were submitted to assessment the isokinetic evaluation of the quadriceps femoris (isometric and isokinetic at 60°/s) and of the electromyography activity of the muscles Vasto Lateralis (VL) and Vasto Medialis (VM), besides the postural oscillation (baropodometry) in two distinct moments: before and immediately after the intervention protocol. The data was analyzed through the SPSS 20.0 software, with a 5% significance level. To verify the homogeneity of the groups it was used an ANOVA one way, and a ANOVA mixed model to compare the intra and inter groups. Results: it was observed differences between the pre and the post, to latero lateral velocity, isometric torque peak and total work in comparison with intragroup. However, it wasn’t verified any difference in comparing the intergroup in the preevaluation and in the post-evaluation protocol over the vibrating platform. Conclusion: the use of the vibrating platform doesn’t change as an immediate manner the isokinetic performance of the quadriceps femoris, the electromyography activity of the VL and the VM, also doesn’t interfere with the postural oscillation of individuals that were submitted to the ACL reconstruction.

Modelagem e análise dinâmica de um sistema de conversão de energia eólica dotado de gerador síncrono de imã permanente utilizando a plataforma ATP

Human development requires a broad balance between ecological, social and economic factors in order to ensure its own sustainability. In this sense, the search for new sources of energy generation, with low deployment and operation costs, which cause the least possible impact to the environment, has been the focus of attention of all society segments. To do so, the reduction in exploration of fossil fuels and the encouragement of using renewable energy resources for distributed generation have proved interesting alternatives to the expansion of the energy matrix of various countries in the world. In this sense, the wind energy has acquired an increasingly significant role, presenting increasing rates of power grid penetration and highlighting technological innovations such as the use of permanent magnet synchronous generators (PMSG). In Brazil, this fact has also been noted and, as a result, the impact of the inclusion of this source in the distribution and sub-transmission power grid has been a major concern of utilities and agents connected to Brazilian electrical sector. Thus, it is relevant the development of appropriate computational tools that allow detailed predictive studies about the dynamic behavior of wind farms, either operating with isolated load, either connected to the main grid, taking also into account the implementation of control strategies for active/reactive power generation and the keeping of adequate levels of voltage and frequency. This work fits in this context since it comprises mathematical and computational developments of a complete wind energy conversion system (WECS) endowed with PMSG using time domain techniques of Alternative Transients Program (ATP), which prides itself a recognized reputation by scientific and academic communities as well as by electricity professionals in Brazil and elsewhere. The modeling procedures performed allowed the elaboration of blocks representing each of the elements of a real WECS, comprising the primary source (the wind), the wind turbine, the PMSG, the frequency converter, the step up transformer, the load composition and the power grid equivalent. Special attention is also given to the implementation of wind turbine control techniques, mainly the pitch control responsible for keeping the generator under the maximum power operation point, and the vector theory that aims at adjusting the active/reactive power flow between the wind turbine and the power grid. Several simulations are performed to investigate the dynamic behavior of the wind farm when subjected to different operating conditions and/or on the occurrence of wind intensity variations. The results have shown the effectiveness of both mathematical and computational modeling developed for the wind turbine and the associated controls.

Plataforma HW-SW para el disparo de fuegos artificiales

Desde la invención de la pólvora en China en torno al siglo IX, los fuegos artificiales han evolucionado de manera notable. En la actualidad, son habituales los espectáculos de fuegos artificiales de gran magnitud, en los que la sincronización y coordinación entre los distintos artificios pirotécnicos es prácticamente perfecta. Esto es posible gracias al desarrollo de sistemas de disparo eléctricos que permiten la automatización de estos espectáculos. Sin embargo, su precio es bastante elevado. En este trabajo se propone el desarrollo de una plataforma hardware /software capaz de realizar todas las funciones de un sistema de disparo profesional con un coste mucho más reducido. El prototipo presentado está compuesto de dos módulos, a los que se pueden conectar 24 artificios pirotécnicos a cada uno. Estos módulos son controlados por un ordenador central que ejecuta el software diseñado capaz de programar y ejecutar espectáculos pirotécnicos. La comunicación entre el ordenador central y los módulos se realiza de forma inalámbrica mediante la creación de una red WiFi.

Una plataforma móvil para la enseñanza de la literatura inglesa

Actualmente vivimos en una época de cambios en la que podemos ver como las tecnologías están presentes en todos lo ámbitos de nuestra vida y cada día avanzan más rápido. Es por eso que el objetivo principal de este trabajo de fin de grado es una propuesta para la innovación educativa, en colaboración con la Universidad Autónoma de Madrid, de actualizar la educación a los tiempos que corren, de utilizar las tecnologías que tenemos a nuestra disposición para facilitar tanto a profesores como a alumnos la labor de enseñanza y aprendizaje. Este proyecto es de nueva creación y se propone la creación de una plataforma móvil que incorpore información creada por los propios alumnos, para que puedan, estudiar o repasar contenidos vistos en clase directamente en sus propios móviles. Para ello se van a utilizar herramientas de desarrollo de aplicaciones móviles, en nuestro caso Android Studio. Como propósito se encuentra el crear una aplicación que sea funcional en la mayoría de los dispositivos actuales, y que por lo tanto no requiera de unas altas especificaciones para su correcto funcionamiento, ni tenga requerimientos excesivos de memoria y batería. También se ha diseñado una plataforma web a través del cual los usuario incluyan su propia información. Se propone estudiar también como los alumnos aceptan este tipo de propuesta.

Evaluación del rendimiento de un planificador de tareas sobre una plataforma heterogénea ARM+DSP de Texas Instruments

El presente trabajo estudia la viabilidad a la hora de aplicar un modelo de programación basado en la extracción de paralelismo a nivel de tareas sobre distintas arquitecturas heterogéneas basadas en un procesador multinúcleo de propósito general acelerado con uno o más aceleradores hardware. Se ha implementado una aplicación completa cuyo objetivo es la detección de bordes en una imagen (implementando el Algoritmo de Canny), y se ha evaluado en detalle su rendimiento sobre distintos tipos de arquitecturas, incluyendo CPUs multinúcleo de última generación, sistemas multi-GPU y una arquitectura objetivo basada en procesadores ARM Cortex-A15 acelerados mediante un DSP C66x de la compañía Texas Instruments. Los resultados experimentales demuestran la viabilidad de este tipo de implementación también para arquitecturas heterogéneas novedosas como esta última, e ilustran la facilidad de programación que introduce este tipo de modelos de programación sobre arquitecturas de propósito específico.

O papel do e-professor na plataforma de e-learning e-raízes : redes

Relatório de estágio apresentado para obtenção do grau de mestre em Educação e Comunicação Multimédia

Controlo e avaliação das características antropométricas e capacidades físicas: caracterização ao longo de uma época desportiva e desenvolvimento de uma plataforma para avaliação

Os objetivos do presente estudo foram: (i) analisar a evolução das características antropométricas e capacidades físicas ao longo de uma época desportiva (comparação entre sub-15, sub-17 e sub-19) e (ii) desenvolver uma plataforma informática para auxiliar o controlo e avaliação. No primeiro trabalho a amostra foi constituída por um total de 50 jogadores portugueses de elite Sub-15 (idade de 14.0 ± 0.1 anos; n=16), Sub-17 (idade de 15.6 ± 0.5 anos; n=14) e Sub-19 (idade de 17.2 ± 0.7 anos; n=20) e foram controlados em três (3) momentos de avaliação; após o período de preparação geral (avaliação pré época), após a 1ª fase do quadro competitivo (avaliação meio época) e após a 2ª fase do quadro competitivo (avaliação pós época). Para a análise antropométrica foi avaliada a altura, massa corporal, índice de massa corporal, massa muscular, massa gorda e perímetros do bicípite, tronco, abdómen, coxa e perna. Para a análise da capacidade física foi avaliada a resistência aeróbia, o trabalho desenvolvido pelos membros inferiores durante o salto vertical, a potência dos membros inferiores durante a corrida, a agilidade e a flexibilidade. Para as características antropométricas encontrou-se para os três (3) escalões um aumento na massa corporal e uma estabilização da massa gorda explicado pelo aumento da massa muscular. As capacidades físicas melhoraram para os três (3) escalões principalmente da avaliação da pré época para o meio da época existindo uma estagnação do meio da época para o final da época. Tendo por base o tempo despendido e a logística necessária aquando da recolha de dados para o primeiro trabalho, desenvolveu-se uma plataforma de forma a auxiliar e simplificar todo o processo. Utilizou-se o software Visual Studio 2013 da Microsoft® sendo usada a linguagem programática vb.net com auxílio a uma base de dados em SQL. Foi definido um diagrama lógico para agilização dos diferentes exercícios com a base de dados no qual se incluiu os testes de agilidade, resistência, flexibilidade, velocidade, altura de salto e análise antropométrica. O entendimento das variações existentes ao longo de uma época desportiva de acordo com o quadro competitivo de cada equipa, as suas idades de desenvolvimento e a inclusão das novas tecnologias para auxiliar o complexo processo de treino, podem contribuir como uma ferramenta fundamental na avaliação e controlo do treino desportivo.

Proposta de arquitetura de plataforma de apoio a terapias a crianças com PHDA

A Perturbação da Hiperatividade e Défice de Atenção (PHDA) é uma perturbação que afeta cerca de 5% das crianças a nível mundial. O seu tratamento baseia-se na medicação e exercícios comportamentais para a criança, os quais podem acarretar efeitos secundários indesejados ou ser demasiado exigentes, respetivamente. Neste contexto, o objetivo do trabalho abordado neste documento foi o desenvolvimento de uma plataforma de apoio à terapia da PHDA, incluindo o desenvolvimento de serious games para crianças com idades entre os 6 e os 12 anos baseados em exercícios comportamentais, com uma abordagem mais lúdica, no intuito de aumentar o fator motivação na execução dos exercícios. A plataforma foi designada não para substituir a terapia tradicional, mas sim complementá-la, permitindo a um clínico manter os seus utentes sobre supervisão entre consultas de rotina. Desta forma, é pretendido a elaboração de um estudo sobre a fiabilidade dos serious games como forma de providenciar aos utentes um melhor controlo sobre os seus sintomas, não recorrendo apenas à terapia tradicional. Os primeiros resultados, obtidos com uma pequena amostra, demonstram uma melhora significativa nas competências das crianças e evidenciam a eficácia e robustez da plataforma em si.

Plataforma Unidose para Lares

A esperança média de vida tem aumentado quer devido às melhorias que se têm verificado nos serviços de saúde e pela evolução da medicina, levando a uma menor taxa de mortalidade, prolongando-se o tempo de vida da população. As famílias, com vidas cada vez mais preenchidas e atarefadas não conseguem prestar o auxílio e o apoio necessário aos idosos, o que leva a que estes frequentem levando estes a frequentar cada vez mais Lares e Centros de Dia para esta população. Isto leva a que exista da parte das instituições acolhedoras, uma enorme responsabilidade pela saúde dos idosos, sobretudo ao nível da medicação, delegando grandes responsabilidades a funcionários e por conseguinte aos seus funcionários. Os funcionários como seres humanos erram, podendo haver negligência ao darem a toma de medicação aos idosos. Ao nível financeiro, cada vez mais os idosos têm menos capacidades financeiras devido à situação económica do país e alguns acabam mesmo por ter que deixar a medicação para sobreviverem. A Plataforma Unidose para Lares (PUL) é uma solução com o objetivo de contrariar ou resolver estes problemas. É possível utilizar o sistema Unidose, vendendo os comprimidos à unidade, o que torna mais económico, e fazendo também a prevenção da toma de medicamentos, de modo a não permitir negligencias nem faltas de tomas. Com a utilização da plataforma as vidas dos idosos e funcionários de lares vão ficar mais calmas, com menos preocupações, melhorando assim a qualidade de vida destes.