Horizontal Error
Mostrando 13-24 de 29 artigos, teses e dissertações.
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13. "Sistemas de análises químicas em fluxo explorando multi-impulsão e detecção espectrofotométrica: aplicação a formulações farmacêuticas e a extratos de solos" / Multi-pumping flow systems with spectrophotometric detection: application to analysis of pharmaceuticals and soil extracts
Multi-pumping flow systems (MP) utilize solenoid pumps as fluid propelling devices, which deliver pulsed flows. This feature was evaluated in relation to the design, operation and performance of the system, to the mixing conditions, and to the dispersion of the introduced solution. The general evaluation of the MP systems involved investigations about precis
Publicado em: 2006
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14. ANISOTROPY INFLUENCE ON NORMAL MOVEOUT CORRECTION IN VTI SEISMIC DATA AND VELOCITY ANALYSIS USINGGRADIENT DESCENDENT / INFLUÊNCIA DA ANISOTROPIA VTI NA CORREÇÃO DE SOBRETEMPO NORMAL EM DADOS SÍSMICOS E ANÁLISE DE VELOCIDADE POR GRADIENTE DESCENDENTE
This work quantifies the error created during seismic processing when isotropic approach is used to normal moveout correction and velocity analysis and the seismic data is anisotropic. This quantification is made by performing velocity analysis in several synthetic seismograms built from a simple (but realistic) geological model with some horizontal layers,
Publicado em: 2005
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15. Reconhecimento de caracteres manuscritos baseado em regiões perceptivas
This work investigates the perceptual zoning mechanism for handwritten character recognition. It is proposed a non-symmetrical zoning mechanism as the baseline on the analysis of the confusion matrix for each individual classifier (Class-Modular). Zoning is a method for local information analysis on partitions of a given pattern. The feature extraction is ba
Publicado em: 2005
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16. Motor control in arm reversal movements in neurologically normal and Down Syndrome individuals / Controle motor de movimentos do braço em individuos neurologicamente normais e em portadores da Sindrome de Down : o efeito do treinamento
Individuals with Down syndrome improve the muscle activities and kinematics patterns of the single-joint movements with practice. Currently, we have showed that neurologically normal individuals increase the impulses of the shoulder muscle torque and elbow interaction torque with practice of the horizontal-planar arm movements with reversal. In this study, w
Publicado em: 2005
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17. Desenvolvimento de dispositivo para calibraÃÃo de sensor de umidade do solo e aplicaÃÃo em sensores tipo tensiÃmetro eletrÃnico e resistÃncia elÃtrica / Development of apparatus for soil moisture calibration was developed and built (DCSUS) and application in sensors electronic type an electronic tensiometer and electric resistance.
Na apparatus for soil moisture calibration was developed and built (DCSUS). The moisture was controlled indirectly by controlling the soil water matrix potenctial using both a porous plate funnel and a pressure chamber system. A 3.0 m high tower wal built in steel and a scale installed on its top. The scale components were an I-bean articulated in its center
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/09/2004
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18. EFEITOS DA IONOSFERA DE BAIXAS LATITUDES NO GPS - SBAS (GLOBAL POSITIONING SYSTEM - SPACE BASED AUGMENTATION SYSTEM) / EFFECT OF THE IONOSPHERE OF LOW LATITUDES IN GPS - SBAS (GLOBAL SYSTEM POSITIONING - SPACE BASED AUGMENTATION SYSTEM)
The low-latitude ionosphere has some features that could cause problems even to the joint GPS/SBAS operation. Among them, one finds the equatorial anomaly, whose electronic density - and thus its refractive index - can present intense horizontal gradients. These gradients can be intense enough to induce errors in the predictions by the GPS/SBAS. To analyze t
Publicado em: 2004
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19. Aplicação de tecnicas espectroscopicas de reflexão no infravermelho no controle de qualidade de farinha de trigo
Neste trabalho são combinadas as potencialidades das técnicas quimiométricas e as facilidades na obtenção de espectros apresentadas pelas técnicas de espectroscopia por reflexão difusa no infravemelho com transformada de Fourier (DRIFTS), espectroscopia por reflexão difusa no infravermelho próximo (NIRRS) e espectroscopia por reflexão total atenuad
Publicado em: 2000
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20. Human smooth and saccadic eye movements during voluntary pursuit of different target motions on different backgrounds.
Horizontal and vertical eye movements of ten human subjects were recorded with a scleral induction-coil technique during voluntary pursuit of sinusoidal, triangular and pseudo-random target motions of different frequency, amplitude and dimensionality upon a dark, diffuse or structured background. Data processing included separation of the composite eye movem
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21. Infant growth charts.
Detection and monitoring childhood growth disorders requires the correct use of growth charts. A check on the accuracy of every point plotted on Gairdner-Pearson growth charts of premature infants in a hospital paediatric department was carried out. Errors beyond set limits were recorded. Of 611 points plotted on the growth charts of 50 premature infants who
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22. Increased drift in amblyopic eyes.
Reports are conflicting on the presence of increased drift in amblyopic eyes. Furthermore, the individual effects of either amblyopia or strabismus alone on ocular drift have not been systematically investigated. We therefore used a photoelectric method to record horizontal eye position during monocular and binocular fixation in patients having amblyopia wit
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23. Neural correlates of horizontal vestibulo-ocular reflex cancellation during rapid eye movements in the cat.
1. The aim of the present study is to describe the behaviour of identified second-order vestibular neurones in the alert cat during eye saccades. A selection of neurones which are involved in horizontal eye movements has been made. The activity has been compared with a selected sample of abducens motoneurones recorded in the same animals. 2. Alert head-fixed
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24. Acquired cupping of the optic nerve head in normotensive eyes.
Clinical measurements of a horizontal cup/disc ratio were obtained among a sample of 160 normal twin subjects by stereoscopic biomicroscopy. Measurements of horizontal cup/disc ratio were normally distributed and theere was no significant association with sex, laterally, race, or refractive error in the mid-range. However, there was a significant association