897 resultados para Impressoras (Processamento de dados)


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Since 2000 the use of the GPS navigation increases considerably. The reason for that was the deactivation of the selective availability in May 2000. However, these receivers do not register the observables, they just estimate and store them and that prevents the post-processing data. Based in this aspect some softwares were developed and are available for free. They allow recording the GPS observables, pseudorange and carrier phase. These programs are able to read in binary files and record information concerning the GPS observables and to convert binary format to a RINEX format. This study presents the GPS Garmin 12 XL evaluation using free programs. Two experiments were carried out in Presidente Prudente-SP region using the relative static survey. The processing was carried out with intervals of 30, 15, 10 and 5 minutes. The results were compared with the coordinates from a geodetic receiver and show that 98.9 % of the points, the values in relation to the planimetric accuracy were better than 0.50 m. The only baseline which the value was larger or equal to 0.50 m is the point M0001 (baseline lesser than 2 km) referred to the first experiment. In terms of precision the values did not exceeded 0.30 m.

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

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Pós-graduação em Engenharia Mecânica - FEG

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The use of the Global Positioning System technology has brought a real revolution in the surveying and georeferencing techniques, which are the basis for many others relevant studies to the many fields of Geography. In this sense, it was seen a massive growth of the use of GNSS receivers in Brazil from the early 2000s, due the duty of Georreferencing Rural Properties to comply with the 10.267/2001 law. For Georreferencing, it is needed high accuracy receivers, and most of time, it is used two receivers: one static base and one rover. To do the adjustment of the base (in order to correct errors), two ways are utilized: post-processing via the brazilian GNSS network - Rede Brasileira de Monitoramento Contínuo dos Sistemas GNSS (RBMC) or via Precise Point Positioning - Posicionamento por Ponto Preciso, both managed by IBGE. Given the wide range of applications as well as discussions on the accuracy of both methods, this monograph aims to conduct a comparative analysis and prove the effectiveness of both methods considering the INCRA’s Standard for Rural Properties Georreferencing. From the processing of GNSS data collected in Piracicaba, Ituverava, Iperó and São Pedro, it could be seen that the research reached the objectives and shows that both methods are accurate and feasible

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Com o passar do tempo e com a maior evolução da informática devido à criação de computadores cada vez mais potentes foram feitos diversos investimentos em ferramentas para transmissão de informações a distância. Dentre essas ferramentas estão softwares para interação usuário-máquina, programas que auxiliam a realização de processos de maneira eficaz e automatizada e a internet, que possibilitou conectar vários usuários em todo o mundo. O uso da informática é cada vez mais necessário em todas as áreas e isso não é diferente na educação. Este trabalho teve como objetivo investigar as condições de 10 escolas localizadas em três cidades do Estado de São Paulo: Campinas, Leme e Botucatu, com relação à utilização da informática no processo de aprendizagem dos alunos e como recurso aos professores e funcionários para o auxilio a informatização do ambiente escolar e desenvolvimento de novas práticas de ensino. Por meio das respostas foi possível fazer um levantamento das condições do uso da informática nas escolas visitadas identificando as deficiências ainda encontradas com relação à utilização dos computadores. Nota-se ainda nas escolas, um equívoco sobre a real função do computador que muitas vezes é confundido como simples entretenimento ao invés de um grande mecanismo para o processo de desenvolvimento cognitivo e aprendizagem.

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Acceleration is a key parameter for engineering and is becoming increasingly important because of the need for companies to become more competitive in the market. Both applying new technologies to their products and optimizing their process lines with predictive maintenance and robotic automation. This study aims to analyze the quality of the signals obtained from a capacitive accelerometer. To do that a test rig was mounted, which consist of a shaker, fed by a signal generator, a linear potentiometer and a capacitive accelerometer; for the signal acquisition was used a acquisition board and the Labview software, in order to integrate twice the signal from the accelerometer and compare it with the sign of the potentiometer. This work also demonstrates the impact of acquired signal processing as well as techniques of pre and post processing of signal via software GNU/Octave

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The Brazilian Environmental Data Collection System (Sistema Brasileiro de Coleta de Dados Ambientais - SBCDA) has been providing reliable information regarding the monitoring of the Brazil environment to INPE (Instituto Nacional de Pesquisas Espaciais) and many Non-governmental organizations (NGO). This system is composed of a large number of Data Collection Plataforms (DCP), in charge of sending local data signals to satellites. Then the satellites automatically redirect each signal to reception centers located at INPE. Nowadays the SBCDA has been operating under the control of three satellites. It is important to mention that two of these satellites have already expired their life span around ten years ago. A strategy to keep the SBCDA operational is to develop a low cost satellite that involves Brazilian Universities and Public Institutions. This graduation work aims to design and simulate a signal conditioning module that enables the collection of a satellite status data, and then sending it to an onboard computer

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With the rapid growth of the use of Web applications in various fields of knowledge, the term Web service enter into evidence in the current scenario, which refers to services from different origins and purpose, offered through local networks and also available in some cases, on the Internet. The architecture of this type of application offers data processing on server side thereby, running applications and complex and slow processes is very interesting, which is the case with most algorithms involving visualization. The VTK is a library intended for visualization, and features a large variety of methods and algorithms for this purpose, but with a graphics engine that requires processing capacity. The union of these two resources can bring interesting results and contribute for performance improvements in the VTK library. This study is discussed in this project, through testing and communication overhead analysis

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The X-ray fluorescence analysis (XRF) is an important technique for the qualitative and quantitative determination of chemical components in a sample. It is based on measurement of the intensity of the emitted characteristic radiation by the elements of the sample, after being properly excited. One of the modalities of this technique is the total reflection x-ray fluorescence (TXRF). In TXRF, the angle of refraction of the incident beam tends to zero and the refracted beam is tangent to the sample-support interface. Thus, there is a minimum angle of incidence that there is no refracted beam and all the incident radiation undergoes total reflection. As it is implemented in very small samples, in a film format, self-absorption effects should not very relevant. In this study, we evaluated the feasibility of using code MCNPX (Monte Carlo N - Particle eXtended), to simulate a measure implemented by the TXRF technique. In this way, it was verified the quality of response of a system by TXRF spectroscopy using synchrotron radiation as excitation beam for a simple setup, by retrieving the characteristic energies and the concentrations of the elements in the sample. The steps of data processing, after obtaining the excitation spectra, were the same as in a real experiment and included the obtaining of the sensitivity curve for the simulated system. The agreement between the theoretical and simulated values of Ka characteristic energies for different elements was lower than 1 % .The obtained concentration of the elements of the sample had high relatively errors ( between 6 and 60 % ) due mainly to lack of knowing about some realistic physical parameters of the sample , such as density . In this way, this result does not preclude the use of MCNPX code for this type of application

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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

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