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The present article proposes a system of a quantitative assessment of the ability of inspectors to make correct decisions, applying an R&R study by attributes, with the method of risk analysis, supported by contingency tables and the Cohen Kappa index. Additionally, it establishes a tool to simplify the required calculations and a proposed inspection method that seeks to reduce the variability associated with the inspection process. In this paper, a simulation study is made. We simulate several quality inspectors and three sceneries. Results show a quality level between 95% and 99% was obtained. It is possible to show that reducing the variability of inspection processes results through standardized methods, criteria equalization, and staff training improves the quality level process. The procedure presented and simulated in this article can be applied in the qualitative inspection, such as manufacturing processes as services processes. [ABSTRACT FROM AUTHOR]

The main purpose of this paper is to establish an appropriate notion of 'authenticity' for all performances and reproductions of musical works'. Authenticity is a characteristic of performances/reproductions related to the conditions of individuation musical work's. Repeatability explains how to obtain well-formed sound events according to a normative model, and normative authenticity explains how a subset of such events will be authentic by having new sound properties, recognized as valuable by a audience. Consequently, the normative model changes without the work losing its identity. [ABSTRACT FROM AUTHOR]

A total of 257 observations were made to 34 river buffalo cows in order to estimate the repeatability values of productive and reproductive traits on a dairy buffalo (Bubalus bubalis) farm, at Ruta Invasora Cattle Company, in Ciego de Ávila, Cuba. The buffalo herds were naturally bred, and were manually milked between 4:00 and 6:00 am; the animals grazed on native and introduced grass all the year. One stud was used per of 30-40 cows. The reproduction data were collected from individual control charts, which included the calving number, weight at weaning (WW), initial weight (IW), calving-calving interval (CCI), and milk production (MP). SPSS, version 23, for Windows was used to estimate the repeatability of the variables studied (weight at weaning, reproduction weight at incorporation, calving interval, and milk production), according to the variance components by the general linear model for inter and intra cow variance components. The repeatability values achieved were 0.41 ± 0.03 for WW; 0.50 ± 0.04 for IWM; 0.01 ± 0.03 for CCI; and 0.65 ± 0.06 for MP. High repeatability values for milk production occurred thanks to the absence of previous genetic selection. [ABSTRACT FROM AUTHOR]

It is described statistical procedures to characterize a group of data from a continuous variable under repeatability conditions, the calculation of confidence intervals, the detection of outliers and the possibility of comparisons of the variances of two or more groups to determine the possible existence of statistically significant discrepancies between them and the relationship with their repeatability. Mention is made of the accuracy of the results, closely associated with the repeatability. Outputs of calculations performed with a statistical programme for the characterization of a continuous variable are presented. [ABSTRACT FROM AUTHOR]

The protocol of the Iberoamerican Epidemiology Network in Visual and Ocular Health (Reisvo) was standardized through the development of a pilot study. Standardization was measured through the test's repeatability and reproducibility, as well as through its degree of agreement with the reference standard. Methodology: There was evaluated a group of healthy schoolchildren between 5 and 15 years of age, who met the inclusion and exclusion criteria under the guidelines of Resolution 8430 of 1993. Two observers performed three measurements of static retinoscopy, and an expert performed cycloplegic retinoscopy. Results: Spherocylindrical forms were converted to Fourier analysis in three components: M, J0 and J45. Intra- and inter-examiner agreement, measured with intraclass correlation coefficient for static retinoscopy, was high in component M, both for intra- and inter-examiner agreement in static retinoscopy, and for correlation between static retinoscopy and cycloplegic retinoscopy. The agreement for components J0 and J45 was weak or zero, and they did not show clinical differences between observers. Conclusions: Static retinoscopy showed good repeatability and reproducibility compared to cycloplegic retinoscopy in implementing the Reisvo protocol. [ABSTRACT FROM AUTHOR]

The objective of this study was to select the most optimal statistic to estimate the experimental accuracy and to assess the Coefficient of Variation often used to estimate the validity of experiments. For the analysis, 406 trials were included; from research conducted at El Ejido Experimental Station and at cornfields of contributing producers of Azuero Region, Panama, during 2000-2013. To each trial it was calculated the various components of variance or Mean Square (MS), Coefficient of Variation (CV), Repeatability, Rank, Least Significant Differences (LSD), Standard Error (SE), Coefficient of determination (R2) of treatment and residual. We found that the CV is more related than repeatability with the overall mean of the experiment (correlation index of 0.57 vs. 0.24), thus being less robust to indicate experimental accuracy. Increasing the number of repetitions of experiments with the same MS Error reduced the SE and increased accuracy. The repeatability of the experiment was highly related to both treatments R2 (0.93) and the unexplained fraction model (0.87), in contrast with the CV (0.23 and 0.23, respectively). When repeatability and CV were linked to the DMS/Range ratio, it was found that repeatability is highly correlated (R2 = 0.76) with this ratio, while the CV provided an R2 of 0.18. This result suggests that the repeatability is a better indicator than the CV for good experimental accuracy. [ABSTRACT FROM AUTHOR]

Variance components and genetic parameters were estimated for total milk production at first lactation (MP1), milk yield adjusted to 305 d and adult equivalent at the first lactation (MP1std), total milk production of the first five lactations (MP5) and milk yield adjusted to 305 d and mature equivalent of the first five lactations (MP5std). The databases of the Mexican Holstein Association (MHA, n= 43,668) and of the National Bank of Dairy Information (NBDI, n= 120,217) were used. Variances were estimated by REML, using a simple animal model for MP1 and MP1std and a repeatability animal model for MP5 and MP5std. Heritability estimates ranged from low to moderate for the first lactation (0.17 ± 0.009 to 0.49 ± 0.019) and for the first five lactations (0.16 ± 0.006 to 0.41 ± 0.004). The repeatabilities for MP5 and MP5std ranged from 0.32 ± 0.002 to 0.41 ± 0.004. The inclusion of information of the NBDI on the national evaluations made possible the incorporation of production data that had not been taken into consideration before. This inclusion not only improved the accuracy of sire breeding values for milk production, but also allowed the prediction of breeding values of more foreign and domestic animals with progeny in Mexico. [ABSTRACT FROM AUTHOR]

Method validation is an activity through which calibration laboratories and / or trial demonstrate that their measurement methods are repeatable, reproducible and stable over time. In this paper the process of validation and the results obtained by the Electrical Metrology Laboratory Variables of the Technological University of Pereira for Trial Ionizing Radiation Measurement shown. [ABSTRACT FROM AUTHOR]

Copyright of Science & Technology in Ocular Health & Vision / Ciencia y Tecnología para la Salud Visual y Ocular is the property of Ciencia y Tecnologia para la Salud Visual y Ocular and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of DYNA - Ingeniería e Industria is the property of Publicaciones Dyna SL and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper shows the implementation of the study of Repeatability and Reproducibility (R & R) conducted to evaluate the Measurement System (MS) used in a study of sensorial thermography in humans, to detect Cumulatives Traumas Disorders (CTD's). Thermography is a noninvasive technique on humans and not harm at all times. Thermography unlike sensory bases its operation on infrared sensors to capture monitoring temperatures and look for abnormalities that could give evidence in the development of disease. For this reason reliability is vital to obtain temperatures for this study was selected R & R as a tool for the validation of the measurement system. This study makes a comparative analysis in the validation of the measurement system to help to predict CTD's, used in the first experiment two operators who handle the meter and take readings at ten persons, which are considered as ten different parts referred to literature in the conventional R & R studies, in which is measured at two different times their skin temperature in the area of the right wrist by each operator. And then, in a second experiment using three operators and ten persons, measured on three different occasions the temperature in the same region as the first experiment. The results obtained in this application by the two experiments showed, in general, the measurement system is excellent according to parameters established by the Automobile Industries Action Group (AIAG), which allows proceeding with the other phases of primary research. [ABSTRACT FROM AUTHOR]

The objective of this work was to estimate the heritability and repeatability of reproductive traits of Holstein cows reared in subtropical conditions. Records from 171 cows were analyzed, which were daughters of 67 sires and 100 dams. The cows were born from 1986 to 2006, in Las Margaritas research station from the Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP), in Hueytamalco, Puebla, Mexico. Genetic parameters were estimated for interval from calving to first registered heat, interval from calving to first registered service, number of services per conception, days open, and calving interval. Variance components for interval from calving to first registered heat, interval from calving to first registered service, days open, and calving interval were estimated with a single-trait repeatability animal model, while variance components for number of services per conception were estimated with a single-trait animal model, which included the direct additive genetic effect as a random effect. Variance components were estimated with derivative- free restricted maximum likelihood using the MTDFREML program. Estimates of heritability were low, from 0,01 (days open) to 0.13 (calving interval). Estimates of repeatability were also low, ranging from 0.11 (interval from calving to first registered service) to 0.16 (days open). In general, estimates of heritability and repeatability obtained are within the interval of estimates reported in the scientific literature. Estimates of genetic parameters indicate that direct response to one-trait selection would be slow. [ABSTRACT FROM AUTHOR]

Environmental Risk Assessment (ERA) of freshwater environment in Peru needs the employment of standardized biological organisms such as the larval midge Ohironomus calligraphus Goeldi. The biological organisms to be employed as ecotoxicological tools should be easy, practical, sensitive and reproductible. The aim of this research was to evaluate Cd+2, Hg+2 and Pb+2 as cadmium chlorure (CdCl2), mercury chlorure (HgCl2) and lead nitrate (Pb3(NO)2) forms, on the mortality of first instar larva of diptera C. calligraphus at 48 h exposure and in this way determinate its variability. The species was acclimated and reared under standardized laboratory conditions. Six bioassays of acute static toxicity for each metal were done, in each one a randomized block experimental design (RBED) was used with four repetitions of five concentrations and employing 240 larvae for each bioassay. The median lethal concentration (LC50) in µg metal L-1 at 48 h exposure and the coefficient of variation (CV %) were: 132 µg L-1 and 45,45 % for Cd+2; 127 µg L-1 and 22,83 % for Hg2+; and finally 18.730 µg L-1 and 33 % for Pb2+. The variability of the essay of C. calligraphus is compared with other freshwater biological organisms all over the world. [ABSTRACT FROM AUTHOR]