Demonstration of non-collocated vibration control of a flexible manipulator using electrical dynamic absorbers

This paper describes an experimental study into the vibration control of a servo system comprising a servo motor and a flexible manipulator. Two modes of the system are controlled by using the servo motor and an accelerometer attached to the tip of the flexible manipulator. The control system is thus non-collocated. It consists of two electrical dynamic absorbers, each of which consists of a modal filter and, in case of an out-of-phase mode, a phase inverter. The experimental results show that each absorber acts as a mechanical dynamic vibration absorber attached to each mode and significantly reduces the settling time for the system response to a step input.

A Sorocabana Railway Company: a relação de uma empresa ferroviária privada com as diretrizes governamentais (1907-1919)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Resistência á fratura e avaliação da microdureza dentinária de coroas dentais submetidas a diferentes protocolos de clareamento intracoronário

Pós-graduação em Ciências Odontológicas - FOAR

Um Método para a Utilização de Ontologias na Indexação Automática

The indexing process aims to represent synthetically the informational content of documents by a set of terms whose meanings indicate the themes or subjects treated by them. With the emergence of the Web, research in automatic indexing received major boost with the necessity of retrieving documents from this huge collection. The traditional indexing languages, used to translate the thematic content of documents in standardized terms, always proved efficient in manual indexing. Ontologies open new perspectives for research in automatic indexing, offering a computer-process able language restricted to a particular domain. The use of ontologies in the automatic indexing process allows using a specific domain language and a logical and conceptual framework to make inferences, and whose relations allow an expansion of the terms extracted directly from the text of the document. This paper presents techniques for the construction and use of ontologies in the automatic indexing process. We conclude that the use of ontologies in the indexing process allows to add not only new feature to the indexing process, but also allows us to think in new and advanced features in an information retrieval system.

O padrão de desenvolvimento dos agronegócios no Brasil e a atualidade histórica da reforma agrária

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Sólitons e Oscillons em cenários com violações da simetria de Lorentz

Pós-graduação em Física - FEG

Efeito da microabrasão e do clareamento dental na rugosidade superficial e microdureza do esmalte dental: estudo longitudinal ‘in situ’

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desenvolvimento de experiências de acionamento e controle do movimento angular de motores de indução trifásico

This paper aims to show practical and effectiveexperiencesfor lessons Industrial Automation Laboratory taught inundergraduate degreein ElectricalEngineering from the University Júlio MesquitaFilho - UNESP, Guaratinguetá. Experiments carriedsimulatecontrol and drive systems of electric three phase induction motors (MIT)widely usedinindustries. The experiments simulate a manufacturing environment where there isa need to control the activation and continuous operation ofelectricmotors. Seven experimentsthat simulatethe firing of electrical motors through a controlsystem, a driver along with asimulator loads coupled to the electric motor was developed. Experiments usinga Programmable Logic Controller (PLC) as acontroller,an inverter frequencyasdriver, and MagneticBrake, as simulatorengine loads . The experiments were divided accordingto the speed reference signal used fordrivingand operating the electric motor: digital and analog. The first five experiments performing the drive control and operation of the electric motor via digital signals. The sixth and seventh experiments using an analog signal as a reference speed for the electric motor

Controle de velocidade de um motor de indução trifásico usando técnicas de ajuste empírico para bancada de teste no laboratório de automação

This work aims to make the closed loop control of a three phase induction motor, through the integration of the following equipment: a frequency inverter, the actuator system; a programmable logic controller (PLC), the controller; an encoder, the velocity sensor, used as a feedback monitoring the control variable and the three-phase induction motor, the plant to be controlled. The control is performed using a Proportional - Integrative - Derivative (PID) approach. The PLC has a help instruction, which performs the auto adjustment of the controller, that instruction is used and confronted with other adjustment methods. There are several types of methods adjustments to the PID controllers, where the empirical methods are addressed in this work. The system is deployed at the Interface and Electro Electronic Control laboratory in the Universidade Estadual Paulista Júlio Mesquita Filho, Guaratinguetá, São Paulo, then, in the future, this work becomes an experiment to be conducted in the classroom, allowing undergraduate students to develop a greater affinity to the programs used by the PLC as well as studies of undergraduate and graduate works with the help of assembly made

Cri-an-ça: a criatividade, a infância e a imaginação expressadas no desenho (porque os adultos têm sempre necessidade de explicações detalhadas)

O interesse por esta temática de trabalho surgiu a partir de um estudo realizado em minha iniciação científica, que tem por título “Ação, Câmera, Luz: Entre imagens e olhares – experiência de infâncias e montagens” desenvolvido no Departamento de Educação do Instituto de Biociências, localizado na Universidade Estadual Paulista – UNESP/Rio Claro. Como o próprio título sugere, ela tem por principal objetivo inverter a lógica da conhecida frase: “Luz, Câmera, Ação”. Este trabalho, ao inverter a ordem dos fatores, busca ver se ao deixarmos a ação das crianças livre, o que se produziria seria algo mais verdadeiro, mais significativo, de fato. O que a ausência de intencionalidade geraria aos produtores de imagens. A partir de então, comecei a imaginar outro tipo de produção de imagens, não mais com câmeras fotográficas e filmadoras, mas de próprio punho. Portanto, este trabalho tem por objetivo analisar as crianças, e suas realidades através do que elas mesmas nos dizem e nos mostram em seu dia a dia por meio de seus desenhos. Os desenhos utilizados foram retirados de uma instituição de ensino não formal da cidade de Rio Claro, e entendidos como documentos. A pesquisa traz também um aporte teórico com as concepções sobre desenho infantil de alguns teóricos, como Lowenfel, Greig, La Pastina, Vigotski entre outros

O uso das TIC nas aulas de matemática na perspectiva do professor

The objective of this research is to understand whether the mathematics lessons teachers use ICT and how they see their use. For this, we prepared a questionnaire with four questions for the subjects of our research, which are ex - students of Bachelor in Mathematics FEG / UNESP, in exercise of the profession. The questionnaire data were analyzed following the procedures of phenomenological research. This approach enabled us to draw up three open categories. The first Recourse to boost student learning and school, leads us to interpret that for the interviewees, ICT resources are leading students to do research making them responsible for their learning and providing them with conditions respond the issues raised by the teacher, which generates greater interactivity. The second, Possibility to use software related to mathematical content shows that the subject sees ICT as resources that allow the study of mathematical content, especially geometry and functions, so that student learning is leverage. The third, Obstacles to the use of technology in the classroom shows that even if the subjects recognize the importance of ICT use, they do not use it as often as they would like because of the difficulties that are related to infrastructure and didactic and pedagogical conditions

Efeito modulador da estratégia vacinal BCG/DNAhsp65 na encefalite autoimune experimental(EAE)

Tanto o BCG (Bacilo de Calmette-Guérin) quanto a DNAhsp65 são vacinas contra tuberculose, porém além da atividade protetora desejável ambas apresentam atividade imunomoduladora. Seguindo a linha de pesquisa de nosso laboratório que investiga a atividade da DNAhsp65 sobre doenças autoimunes, avaliamos o efeito da associação destas vacinas sob a forma de uma estratégia vacinal tipo prime-boost (priming com BCG seguida de booster com DNAhsp65), sobre o desenvolvimento da Encefalite Autoimune Experimental (EAE), que é modelo animal de esclerose múltipla. Ratos Lewis fêmeas foram divididos em grupos de 5 a 6 animais (salina, BCG, EAE, BCG/EAE, BCG/vetor/EAE e BCG/vacina/EAE) e imunizados em intervalos de 15 dias. Os animais receberam um primming com 2 - 10 x 105 unidades formadoras de colônias de BCG subcutâneo seguido de dois boosters com 300 g de pVAXhsp65 numa solução de sacarose 25% por via intramuscular. A EAE foi induzida 15 dias após a última imunização, por inoculação de 25 g de proteína básica de mielina (MBP) associada ao Adjuvante Completo de Freund contendo Mycobacterium butyricum. Aqueles que não receberam os inóculos descritos foram injetados com salina, exceto o grupo BCG/vetor/EAE que recebeu 300 g de pVAX (vetor plasmidial vazio) também em solução de sacarose. Os animais foram acompanhados diariamente até serem submetidos à eutanásia, 3 semanas mais tarde, durante a fase de recuperação da doença para avaliação da resposta imune, escore clínico e presença de infiltrado inflamatório no SNC. A evolução clínica da EAE foi similar entre animais vacinados e não vacinados, mas a análise histopatológica revelou que a imunização prévia com BCG ou BCG/DNAhsp65 diminui o processo inflamatório. No cérebro foi observada redução acentuada do processo inflamatório nos grupos BCG/EAE, ...(Resumo completo, clicar acesso eletrônico abaixo)

Avaliação de Desempenho de Aplicações Paralelas Utilizando MPI e PETSc

This work presents a study about the use of standards and directions on parallel programming in distributed systems, using the MPI standard and PETSc toolkit, performing an analysis of their performances over certain mathematic operations involving matrices. The concepts are used to develop applications to solve problems involving Principal Components Analysis (PCA), which are executed in a Beowulf cluster. The results are compared to the ones of an analogous application with sequencial execution, and then it is analized if there was any performance boost on the parallel application

Estudo das políticas de obtenção dos assentamentos de reforma agrária no Brasil entre 1985 e 2009

Understanding the territorial transformations is important to the geographic knowledge, especially when it is related to structural questions as agrarian one. In this way, the land acquisition to agrarian reform enables us to understand some of these transformations, represented by territorialization of landless workers in rural settlements, that are concrete results of the struggle for land that boost the policies of agrarian reform in our country. The renewal of the agrarian structure is fundamental to the concept of land reform and also provides that advances social, political, cultural, economic, etc. Classified as a country with rates of the highest land concentration in the world, Brazilian government attempts to base his actions to take in the expropriation of land the main character of the land reform. However, new policies have been gradually used to obtaining the rural settlements, in a process that Fernandes (2010) called the reconceptualization of land reform. Starting in 1985, Brazil has 63% of the beneficiaries of land reform policies settled on expropriated land, the rest is a result of incorporation policies such as land regularization, of land reform and land purchase. Such policies generate changes in agrarian structure, that is the goal of land reform, but don´t concentrate to the land ownership. This attitude of the state in coping with the agrarian question is his response to the pressures of capitalist agriculture represented by landowners and agribusiness, coping catching an intense and uneven territorial dispute with peasant agriculture, in an attempt to impose its model of development for the field. The aimed of this present study is to understand better the land reform acquisition and its implications in the Brazilian territory, in order to understand it in their multiplicity.

Análise da viabilidade econômica na implantação de inversores frequência em sistemas de bombeamento

The present work aims to conduct a study of the economic feasibility of the implementation of variable frequency inverters in pump systems with variable flow rates. The concern with the reduction of energy expenditure in industries raised in 2001 due to the energy crisis that hit Brazil at that time, forcing industries to reduce their electric costs under penalty of fines if this were not done (MOREIRA, 2008). Frequency inverter is an electronic device that allow greater control in the operation of pumping systems and also a reduction in electrical consumption, being a viable solution to achieve a reduction in energy consumption. For the development of this work, approaching important topics in pumping systems was necessary in order to make a correct choice of hydraulic pumping and also other components responsible for the operation of the system , such as electric motors and frequency inverters. In the case study, a theoretical analysis of the behavior of electrical consumption in systems with variable flow rates was performed, comparing when the system is operated via frequency inverters and when the system is operated without such a device. As expected, the result of the implantation of the device was quite satisfactory, and the primary goal of reducing energy expenditure was achieved. Also important to highlight the environmental issue of this work, as all forms of energy production affects nature in some way, achieving a reduction in consumption also contributes indirectly in environmental conservation