Measurement Error
Mostrando 1-12 de 241 artigos, teses e dissertações.
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1. Estimation and Mapping of the Received Power Level of Digital Signals TV Using Spatial Interpolation Methods
Abstract The signal digitization process of the open television system is still in progress, therefore, the study of the digital signal propagation has great importance so that broadcasters can develop and improve the transmission service. The field measurement of digital signal parameters is one of the most reliable means to analyze the signal propagation i
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Allometric models for estimating the leaf area of lisianthus (Eustoma grandiflorum) using a non-destructive method
ABSTRACT Lisianthus (Eustoma grandiflorum) is a cut flower grown due to the wide diversity of colors and longevity in the post-harvest. The leaf area measurement is fundamental in plants because the leaves are directly related to several processes such as transpiration, radiation interception and CO2 fixation that enable the plant to grow. The objective of t
Revista Ceres. Publicado em: 2022
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3. EVALUATION OF THE RADIOMETRIC ACCURACY OF IMAGES OBTAINED BY A SEQUOIA MULTISPECTRAL CAMERA
ABSTRACT Geometric and radiometric corrections of images obtained by remotely piloted aircraft systems (RPAS) are required for the measurement of the spectral reflectance and calculation of vegetation indices. This study aimed to determine which radiometric calibration procedures allow obtaining suborbital images with more accurate reflectance data and spect
Eng. Agríc.. Publicado em: 2020-12
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4. FITTING AND CALIBRATING A MIXED-EFFECTS SEGMENTED TAPER MODEL FOR BRUTIAN PINE
ABSTRACT Taper models are one of several necessary tools in modern forest inventory, giving information on diameter at any point along the tree stem and this information can also be used to estimate stem volume. In this study, we used nonlinear mixed-effects (NLME) modeling approach to minimize existing statistical problems in constructing taper equations. A
CERNE. Publicado em: 2020-12
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5. Cross-cultural adaptation, validity and reproducibility of the Back Beliefs Questionnaire among older Brazilians with acute low back pain. A cross-sectional study
ABSTRACT BACKGROUND: Low back pain (LBP) has emerging as an epidemic, multifactorial and multidimensional condition in older age. Assessment of attitudes and beliefs of patients with back pain is necessary for understanding the impact of psychosocial factors on pain perception and management. OBJECTIVES: To cross-culturally adapt and examine the validity
Sao Paulo Med. J.. Publicado em: 2020-08
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6. Translation, cross-cultural adaptation and validation of the Finnish Diabetes Risk Score (FINDRISC) for use in Brazilian Portuguese: questionnaire validity study
ABSTRACT BACKGROUND: The Finnish Diabetes Risk Score (FINDRISC) is a questionnaire that was developed by Finnish researchers to track the risk of diabetes. OBJECTIVE: To translate, cross-culturally adapt and validate the FINDRISC for use in Brazilian Portuguese. DESIGN AND SETTING: Questionnaire validity study conducted at a private university. METHOD
Sao Paulo Med. J.. Publicado em: 2020-06
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7. Transverse Load Discrimination in Long-Period Fiber Grating via Artificial Neural Network
Abstract We present a general investigation of a Long-Period Grating (LPG) for transverse strain measurement. The transverse strain sensing characteristics, for instance, the load intensity and azimuthal angle, are analyzed with the data set generated by the LPG sensor and probed by artificial neural network (ANN). Furthermore, we evaluate and compare the pr
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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8. Monitorizacion del gasto cardiaco con ecocardiografia transtoracica y cateter de Swan Ganz. Estudio comparativo en pacientes en ventilacion mecanica con presión positiva espiratoria final elevada
ABSTRACT Objective: To compare cardiac output measurements by transthoracic echocardiography and a pulmonary artery catheter in mechanically ventilated patients with high positive end-expiratory pressure. To evaluate the effect of tricuspid regurgitation. Methods: Sixteen mechanically ventilated patients were studied. Cardiac output was measured by pulmona
Rev. bras. ter. intensiva. Publicado em: 20/01/2020
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9. Avaliação das propriedades de medida das versões brasileiras da Escala de Estado Funcional para UTI e da Medida de Independência Funcional em pacientes críticos na unidade de terapia intensiva
RESUMO Objetivo: Comparar as propriedades de medida (consistência interna, confiabilidade intra e interavaliadores, validade do construto, e efeitos teto e piso) da Escala de Estado Funcional para UTI (FSS-ICU - Functional Status Score for the ICU) e da Medida de Independência Funcional (MIF)-domínio motor). Métodos: Neste estudo de propriedades de med
Rev. bras. ter. intensiva. Publicado em: 20/01/2020
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10. Confiabilidade da ultrassonografia de músculos esqueléticos em pacientes críticos de trauma
RESUMO Objetivo: Avaliar a segurança e a viabilidade da avaliação por ultrassonografia do quadríceps no pronto-socorro, e avaliar a confiabilidade intra e entre avaliadores para aquisição e análise de imagens de ultrassonografia da espessura e da ecogenicidade muscular em pacientes críticos de trauma. Métodos: Estudo de precisão diagnóstica real
Rev. bras. ter. intensiva. Publicado em: 20/01/2020
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11. The Brazilian Portuguese-language version of the Manchester Respiratory Activities of Daily Living questionnaire: construct validity, reliability, and measurement error
RESUMO Objetivo: Testar a validade de construto, a confiabilidade e o erro de medida da versão em português do Brasil do questionário Manchester Respiratory Activities of Daily Living (MRADL) em pacientes com DPOC. Métodos: Avaliamos 50 pacientes com DPOC, 30 dos quais eram homens. A média de idade foi de 64 ± 8 anos, e a mediana do VEF1 em porcentag
J. bras. pneumol.. Publicado em: 13/12/2019
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12. Effect of laser treatment on postural control parameters in patients with chronic nonspecific low back pain: a randomized placebo-controlled trial
The management of nonspecific lumbar pain (NSLP) using laser irradiation remains controversial. A systematic review of recently published studies indicates that the effects of laser therapy are commonly assessed using only imperfect methods in terms of measurement error. The main objective of this study was to assess static postural stability using an object
Braz J Med Biol Res. Publicado em: 25/11/2019