Field Sensor
Mostrando 25-36 de 158 artigos, teses e dissertações.
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25. Comparative Study of Magnetic Properties and Microstructure for As-cast and Square-wave Pulse Current Joule Annealed Wires
We here report on a comparative study of the microstructure and magnetic properties of as-cast and SPCJA-ed Co-based wires for potential sensor applications. Experimental results indicate that both as-cast and SPCJA-ed wires exhibit typical amorphous feature. There also exists the enhanced local ordering degree of atomic arrangement and obvious transformatio
Mat. Res.. Publicado em: 23/10/2015
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26. Syntheses and Fundamental Properties of Fe-rich Metastable Phase Alloys with Saturation Magnetization Exceeding 1.9 T
A melt-spun Fe90Si5B5 alloy ribbon consists of bcc-Fe(Si) + Fe3B + amorphous phase and exhibits good bending ductility, high tensile fracture strength above 1000 MPa, high corrosion resistance and unique magnetic properties as exemplified for high saturation magnetization exceeding 1.9 T, moderately high initial permeability of about 150 and low coercivity o
Mat. Res.. Publicado em: 23/10/2015
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27. Method to Determine the Electrical Energy for Ignition of Electro-Explosive Devices
ABSTRACT: During field trials, it was observed that the delay of ignition of electro-explosive devices (EED) depends on ratings of power supplies or dynamo and also on the firing cable lengths. The change in ignition delay of EEDs due to altered supplied current will detoriate the repeatability of sequence of actions in time-critical armament applications. I
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
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28. Non-Enzymatic Amperometric Determination of Glucose by CuO Nanobelt Graphene Composite Modified Glassy Carbon Electrode
We have successfully developed for the first time an electrochemical sensor for glucose by using a simple and effective design of growing CuO nanobelts graphene composites (CuO@G). The as prepared composites were characterized by X-ray diffraction studies (XRD), field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM)
J. Braz. Chem. Soc.. Publicado em: 2015-08
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29. Comparative Sensibility Study of WO3 ph Sensor Using EGFET and Ciclic Voltammetry
In this present study, the investigation about pH sensorial properties of WO3, via sol-gel, was evaluated by Voltammetry and Extended Gate Field Effect Transistor techniques. The X-ray diffractogram indicates the presence of a lamellar structure, d = 0.69 nm, resulting in WO3.2H2O. From Scanning Electron Microscopy of WO3.2H2O was observed a process correspo
Mat. Res.. Publicado em: 2015-02
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30. Análise das mudanças dos parâmetros físicos da superfície derivados das queimadas no estado de Rondônia
O objetivo principal deste trabalho consistiu na avaliação dos impactos das queimadas na modificação da temperatura do solo e da radiação de ondas curtas no Estado de Rondônia nos anos de 2000 a 2011, utilizando o RegCM4 para a modelagem dos dados. Este modelo necessita da entrada de dados como o uso e cobertura da terra (com e sem queimadas) e parâm
Bol. Ciênc. Geod.. Publicado em: 2014-12
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31. Hardware embedded fiber sensor interrogation system using intensive digital signal processing
The description of an interrogation system for fiber Bragg grating sensors is reported. The full implementation in hardware of the required signal processing is proposed and made publicly available. The hardware description is implemented in a field programmable gate array (FPGA) development kit and the processing units allow one to control an optoelectronic
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-12
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32. Estimativa de atributos do solo por meio de espectrorradiometria difusa
Diversos avanços têm sido conquistados no campo da espectrorradiometria difusa, nas últimas décadas. Na área agrícola, a busca por métodos de quantificação de atributos físicos e químicos do ambiente de produção, com base na reflectância do solo, tem sido pesquisada constantemente. O objetivo deste trabalho foi avaliar a possibilidade de estima
Rev. Bras. Ciênc. Solo. Publicado em: 2013-08
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33. Indium tin oxide synthesized by a low cost route as SEGFET pH sensor
Polycrystalline ITO films with good optoelectronics characteristics and homogeneous surface has been obtained upon annealing at 550 °C in N² atmosphere using a low-cost chemical vapor deposition (CVD) system. The films were evaluated as pH sensors in separative extended gate field-effect transistor (SEGFET) apparatus, exhibiting a sensitivity of 53 mV/pH,
Mat. Res.. Publicado em: 02/07/2013
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34. Determining the Fixed Pattern Noise of a CMOS Sensor: Improving the Sensibility of Autonomous Star Trackers
ABSTRACT: Autonomous star trackers are optical-electronic devices used for attitude determination of artificial satellites, having as a reference for this computation the positions of stars. There is one autonomous star tracker in development at the Aerospace Electronics Division of the Brazilian National Institute for Space Research. The autonomous star tra
J. Aerosp. Technol. Manag.. Publicado em: 2013-06
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35. Sensor químico baseado em microponte de impedância = : Chemical sensor based on impedance microbridge / Chemical sensor based on impedance microbridge
A integração de sistemas microeletrônicos em lab-on-a-chip está sendo cada vez mais necessária para concretizar novas aplicações dentro do emergente campo da microfluídica. Tanto na química quanto na bioquímica e até mesmo na medicina e bioengenharia, a microfluídica evolui conquistando um espaço crescente. Entretanto, desafios tecnológicos res
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2012
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36. Caracterização ambiental e estimativa da produção de cargas difusas da área de drenagem da represa de Itupararanga, SP / Environmental characterization and estimative of diffuse pollution of Itupararanga watershed, SP
The use of satellite images has improved the study of the land use dynamics. Land cover mapping have become fundamental tools in the assessment of landscape changes caused by human action and its influence on regional and urban planning. Computation tools such as Geographic Information Systems and hydrological models have supported these findings. The hydrol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012