Self Calibration
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. CANTILEVER NANOBIOSENSOR BASED ON THE ENZYME UREASE FOR DETECTION OF HEAVY METALS
Abstract Cantilever nanobiosensors have emerged as an alternative to conventional methods of analysis to monitor heavy metals, which are being highlighted by detecting substances at the micro and nanoscale through the use of sensor layers. In the present study, a new cantilever nanobiosensor was developed functionalized with urease enzyme by self-assembled m
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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2. Perceived Environmental Supportiveness Scale: Portuguese Translation, Validation and Adaptation to the Physical Education Domain
Abstract Aim: Grounded on Self-Determination Theory, this study aimed to translate, adapt and validate the Perceived Environmental Supportiveness Scale (PESS) in a sample of Portuguese physical education students. Methods: The global sample was comprised of 964 students (518 females), divided in two groups: the calibration (n = 469) and the validation on
Motriz: rev. educ. fis.. Publicado em: 01/07/2019
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3. Development of an eletronic multi-sensor for measuring the humidity, temperature and electric conductivity of the soil / Desenvolvimento de um multi-sensor eletronico para medida da umidade, temperatura e condutividade eletrica do solo
The implementation of precision agriculture techniques requires the use of sensors which can measure the characteristics of the soil. In this work it was designed and fabricated a multi-sensor probe, capable of measuring the electrical conductivity, the volumetric humidity, and the temperature of the soil, using a four probes device. The electrical conductiv
Publicado em: 2008
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4. Development of a tridimensional surface digitaliztion system based on computer vision and laser scanning with metrological purpose / Desenvolvimento de um sistema de digitalização tridimencional de superfícies baseado em visão computacional com varredura a laser para uso em metrologia dimensional
Most of todays 3D laser scanning systems for object model digitalization rely on angular position sensors to measure rotation of a laser diode and to reconstruct the object. However, those types of sensors restrict the object size in target and its distance from the image sensor, since reconstruction is usually based on equations for geometric triangulation,
Publicado em: 2008
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5. Calibração dos canais nucleares do Reator IPEN/MB-01, obtida a partir da medida da distribuição espacial do fluxo de nêutrons térmicos no núcleo do reator através da irradiação de folhas de ouro infinitamente diluídas / CALIBRATION OF THE NUCLEAR POWER CHANNELS OF THE IPEN/MB-01 REACTOR OBTAINED FROM THE MEASUREMENTS OF THE SPATIAL THERMAL NEUTRON FLUX DISTRIBUTION IN THE REACTOR CORE THROUGH THE IRRADIATION OF INFINITELY DILUTED GOLD FOILS
Several nuclear parameters are obtained through the gamma spectrometry of targets irradiated in a research reactor core and this is the case of the activation foils which make possible, through the measurements of the activity induced, to determine the neutron flux in the place where they had been irradiated. The power level operation of the reactor is a par
Publicado em: 2008
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6. Desenvolvimento de Imunossensor EletroquÃmico para detecÃÃo do AntÃgeno ProstÃtico EspecÃfico (PSA) empregando eletrodo de ouro
Prostatic Specific Antigen (PSA) is a valuable biomarker for prostate cancer screening. For PSA determination, the immunosensors emerge as a very attractive technique due to its simplicity, specificity and less time for analysis when compared to conventional techniques of immunoassays. An immunosensor based on a gold electrode was used in an electrochemical
Publicado em: 2008
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7. Um método para determinação da profundidade combinando visão estéreo e autocalibração para aplicação em robótica móvel
This work proposes a method to determine the depth of objects in a scene using a combination between stereo vision and self-calibration techniques. Determining the rel- ative distance between visualized objects and a robot, with a stereo head, it is possible to navigate in unknown environments. Stereo vision techniques supply a depth measure by the combinati
Publicado em: 2007
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8. Modelação das deformações por colapso devidas à ascensão de lençol freático / Modeling of the collapse deformations due to rise of groundwater table
This thesis presents a case history of soil collapse that took place during and after reservoir filling of Três Irmãos dam in Brazil. The construction of this dam and subsequent reservoir filling has raised the local groundwater table up to 20 m, causing soil collapse that affected many buildings. Many field and laboratory tests were conducted to determine
Publicado em: 2007
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9. One step self-calibration procedure in gamma-ray energy measurements
This paper presents a one step self-calibration procedure, based on the least squares method, to be used in gamma-ray energy measurements. The obtained equation allows a qualitative interpretation of the information provided by an experiment.
Brazilian Journal of Physics. Publicado em: 2003-06
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10. Long-term performance of a hand held spirometer.
BACKGROUND: A study was undertaken to test the long term performance of a small hand held spirometer for self-administered serial spirometric testing. METHODS: Thirty turbine pocket spirometers (MicroMedical DiaryCard) were used in a clinical trial on 22 emphysematous patients with severe alpha 1-antitrypsin deficiency. The spirometers were able to store the
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11. PHOTOMETER FOR MEASURING THE SCOTOPIC CANDLEPOWERS OF SELF-LUMINOUS OPHTHALMIC TEST OBJECTS
A PHOTOMETER is described with which the scotopic candlepowers of very feeble light sources (down to about 10−9 candle) can be measured. Small spots of radium paint, 2 or 3 mm. in diameter and having candlepowers in the range covered, are now used (Livingston) to plot the dark-adapted visual field, and the present photometer was designed primarily for thei
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12. Low atmospheric CO2 levels during the Permo- Carboniferous glaciation inferred from fossil lycopsids
Earth history was punctuated during the Permo-Carboniferous [300–250 million years (Myr) ago] by the longest and most severe glaciation of the entire Phanerozoic Eon. But significant uncertainty surrounds the concentration of CO2 in the atmosphere through this time interval and therefore its role in the evolution of this major prePleistocene glaciation. He
The National Academy of Sciences.