Desenvolvimento e implementação de estratégias de controle digital para regulação de tensão e amortecimento de oscilações eletromecânicas em um gerador síncrono de 10kVA

Neste trabalho são apresentados o desenvolvimento e a implementação de estratégias de controle digital para regulação automática de tensão e para o amortecimento de oscilações eletromecânicas em um sistema de potência em escala reduzida de 10kVA, localizado no Laboratório de Controle de Sistemas de Potência (LACSPOT), da Universidade Federal do Pará (UFPA). O projeto dos dois controladores é baseado na técnica de alocação polinomial de polos. Para o projeto do Regulador Automático de Tensão (RAT) foi adotado um modelo simplificado, de primeira ordem, da máquina síncrona, cujos parâmetros foram levantados experimentalmente. Para o controlador amortecedor, por sua vez, também chamado de Estabilizador de Sistemas de Potência (ESP), foi utilizado um modelo discreto, do tipo auto regressivo com entrada exógena (ARX). Este modelo foi estimado por meio de técnicas de identificação paramétrica, considerando para tal, o conjunto motor-gerador interligado a um sistema de maior porte (concessionária de energia elétrica). As leis de controle foram embarcadas em um microcontrolador de alto desempenho e, para a medição dos sinais utilizados nos controladores, foi desenvolvida uma instrumentação eletrônica baseada em amplificadores operacionais para o condicionamento dos sinais dos sensores. O sinal de controle é baseado na técnica de modulação por largura de pulso (PWM) e comanda o valor médio da tensão de um conversor CC-CC, o qual é utilizado como circuito de excitação que energiza o enrolamento de campo do gerador. Além disso, o acionamento elétrico das máquinas que compõem o grupo gerador de 10kVA foi projetado e automatizado somando segurança aos operadores e ao componentes deste sistema de geração. Os resultados experimentais demonstraram o bom desempenho obtido pela estratégia proposta.

Determinação da qualidade da radiografia digital aplicada às soldas de gasodutos e oleodutos terrestres e marítimos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Determinação da profundidade da lesão de cárie oclusal em dentes decíduos por meio de radiografias convencional e digital direta. Efetividade dos recursos de imagem e desempenho do examinador

Pós-graduação em Odontologia - FOAR

Uso do Google mapas como recurso didático para mapeamento do espaço local por crianças do ensino fundamental I da cidade de Ouro Fino/MG

Pós-graduação em Geografia - IGCE

Avaliação de reabsorções radiculares externas por meio de reconstrução digital de imagens e subtração radiográfica digital

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Características e conhecimentos sobre tabagismo em grupos específicos: adolescentes e gestantes

Pós-graduação em Fisiopatologia em Clínica Médica - FMB

Estudo e relato do processo de criação de um jogo digital

With the advancement of the gaming industry in the market, became evident the need for trained professionals working in this area. This paper tries to study and report the process of creating a game for professional and aspirants game developers. For this reason, throughout this monograph will describe how was the process of creating a digital game developed by students at the Universidade Estadual Paulista-UNESP Bauru. The project tries to explore current mechanical created along with an emotional storyline

Comunicação e agronegócios: uma análise da informação digital

This project aims validate that the market for digital information in brazilian agribusiness is promising for the communicators and to ratify the growing demand for reliable, instant and targeted informations to their actual needs. After a review that based the results and of the development of the electronic questionnaire, the intersection of data and information made possible illustrate and confirm the hypotheses

Melhor idade na rede: uma visão da inclusão digital do idoso : estudo do caso da Universidade Aberta à Terceira Idade da UNESP Bauru

In the information society, the use of Technologies has been incorporated to our quotidian. The use of personal computers and internet, however, does not reach to all the individuals, creating the problem of digital exclusion. Nowadays, many inclusion politics are being developed to diminish the digital abyss in society, in a way to enable a plural access to the internet. Between these initiatives, we highlight the projects of digital inclusion among the elderly, slice of the population that grows more each day and seek quality of life, social reinclusion and health. In this context, the open universities for the elderly bring to the aged courses and workshops, in order to encourage the activity in this age group. An example of this idea is the Unati of UNESP Bauru, that develops the project “Terceira Idade Digital”. This work aims to analyze the relation between the elderly with certain technologies, apart from showing the digital inclusion scenario, with its delays and progresses

Relações públicas aplicadas à comunicação pública digital: conceitos, práticas e recomendações

The increasing amount of information about public management conveyed by government electronic portals in the internet has attracted the attention of scientific research, which has resulted in reviews of the contribution of such channels of public communication for the expansion of citizenship. It is the duty of the government to inform citizens effectively as well as using effective language to deal with different ways of relating with each public. Based on data collected in the official social media of state government during search for Scientific Initiation PIBIC/CNPq entitled “Digital Democracy and Social Networks: Analysis of Use of Internet by the Government of State of Sao Paulo” and official strategic manuals of the first industry this work of course completion has analyzed practices and recommendations of the area to contribute to the development of strategies of public communication

Letramentos acadêmicos e multimodalidade em contexto de EaD semipresencial

From a theorethical enunciative-discursive perspective, this article aims at discussing the process of the text consistency in digital context, in a particular manner, by means of problematic semiotic modes and resources updated in the academic production of the student who uses internet access computers in the semi-present Distant Learning (DL) process. It’s of interest to investigate how the academic literacies model may be linked to the multimodality study, considering, in theory, that in an electronic environment, the student has “unlimited” access to every and any kind of text, not just the “verbal” (name generally attributed to the graphic component) one. The collected material contains texts which were produced by the semi-present Pedagogy Course students from the Virtual University of São Paulo (UNIVESP), in 2010.

Digital radiography for determination of primary tooth length: in vivo and ex vivo studies

Background. Methods for determining the root canal length of the primary tooth should yield accurate and reproducible results. In vitro studies show some limitations, which do not allow their findings to be directly transferred to a clinical situation. Aim. To compare the accuracy of radiographic tooth length obtained from in vivo digital radiograph with that obtained from ex vivo digital radiograph. Method. Direct digital radiographs of 20 upper primary incisors were performed in teeth (2/3 radicular resorption) that were radiographed by an intraoral sensor, according to the long-cone technique. Teeth were extracted, measured, and mounted in a resin block, and then radiographic template was used to standardise the sensor-target distance (30 cm). The apparent tooth length (APTL) was obtained from the computer screen by means of an electronic ruler accompanying the digital radiography software (CDR 2.0), whereas the actual tooth length (ACTL) was obtained by means of a digital calliper following extraction. Data were compared to the ACTL by variance analysis and Pearson’s correlation test. Results. The values for APTL obtained from in vivo radiography were slightly underestimated, whereas those values obtained from ex vivo were slightly overestimated. No significance was observed between APTL and ACTL. Conclusion. The length of primary teeth estimated by in vivo and ex vivo comparisons using digital radiography was found to be similar to the actual tooth length.

Acurácia das medidas de limas endodônticas em radiografias digital e convencional: estudo in vitro em dentes decíduos

The objective of this study is to evaluate the measurement accuracy of endodontic files obtained by digital and conventional radiographies in primary teeth. Kerr and Hedströen files (# 20), with the reference as the apparent length of tooth, were inserted in the root canal of 18 extracted primary teeth, which were x-rayed by digital and conventional techniques. Measurements from a reference point to the apical end were carried out by an experienced operator twice in a week. An electronic ruler was used for the digital method and a caliper was used for the conventional method. The data were subjected to Pearson correlation test and Student´s t test (p = 0.05). The correlation between the first and the second measurements was r = 0.99, regardless the type of file and method. Comparing the measurements within the methods, the agreement was r = 0.96 for Kerr and r = 0.95 for Hedströen files. The values of length files in the digital radiographies were statistically lower than that obtained in the conventional radiographies (p = 0.02). However, the values obtained by the two methods were statistically similar to real length of teeth for Kerr files (p = 0.29) and for Hedströen files (p = 0.18). The digital radiography was a more trustful method to obtain the lengths of endodontic files.

Desenvolvimento de um aplicativo de guia de programação de canais de TV digital

Pós-graduação em Televisão Digital: Informação e Conhecimento - FAAC

Tecnologia da informação, discurso e poder: análise de domínio a partir do conceito de exclusão digital na perspectiva da teoria centro-periferia

Pós-graduação em Ciência da Informação - FFC