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Academic literature on the topic 'Coefficient of concordance'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2024

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Journal articles on the topic "Coefficient of concordance"

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CASTRO, CAÍQUE JAUHAR DE, LUIS EDUARDO CARELLI TEIXEIRA DA SILVA, LUIZ EDUARDO ALMEIDA, ALDERICO GIRÃO CAMPOS DE BARROS, ROBSON TEIXEIRA VITAL, MÁRCIA MARIA RODRIGUES JARDIM, and GIULIANA VASCONCELOS DE SOUZA FONSECA. "INTRA- AND INTEROBSERVER ANALYSIS OF PEDICLE SCREW PLACEMENT IN SCOLIOSIS CORRECTION." Coluna/Columna 19, no. 3 (July 2020): 172–75. http://dx.doi.org/10.1590/s1808-185120201903224255.

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ABSTRACT Objective To establish the statistical interobserver and intraobserver concordance of thoracic pedicle screw placement in scoliosis surgery, with a 4-week interval between the two analyses. Methods Of 55 patients that evaluated the intra- and interobserver concordances of the screw positions (according to the Abul-Kasim classification) using the Kappa coefficient. Results The intraobserver concordance ranged from a Kappa coefficient of 0.516 to 0.889 (“moderate” to “almost perfect”) between the two analyses performed four weeks apart. Interobserver concordance ranged from 0.379 to 0.633 (“reasonable” to “strong”). Conclusion The intraobserver concordance was always greater than the interobserver concordance. No concordance coefficient was classified as “insignificant” or “weak”. Level of Evidence III; Retrospective study.

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Liao, Jason J. Z. "An improved concordance correlation coefficient." Pharmaceutical Statistics 2, no. 4 (2003): 253–61. http://dx.doi.org/10.1002/pst.52.

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张, 天芳. "Understanding of Kendall’s Coefficient of Concordance." Statistics and Application 09, no. 04 (2020): 578–81. http://dx.doi.org/10.12677/sa.2020.94061.

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King, Tonya S., Vernon M. Chinchilli, and Josep L. Carrasco. "A repeated measures concordance correlation coefficient." Statistics in Medicine 26, no. 16 (2007): 3095–113. http://dx.doi.org/10.1002/sim.2778.

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Cabała, Paweł. "Zastosowanie współczynnika konkordancji w pomiarze zgodności ocen ekspertów." Przegląd Statystyczny. Statistical Review 2010, no. 2-3 (September 30, 2010): 36–52. http://dx.doi.org/10.59139/ps.2010.02-03.3.

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In this article the problem of the measurement of agreement among experts is discussed. There are several tools to verify whether opinions expressed by an ordinal scale are reliable. If the objects are ranked, one of correlation coefficients is chosen. At the beginning, the case of m > 2 experts ranking n objects is presented; first, using untied ranks and second, tied ranks. To this end Kendall’s coefficient of concordance is applied. The method of examination of the statistical significance is also presented. Additionally the issue of the interpretation of the concordance coefficient in reference to the average of Spearman’s r coefficients is raised. The paper provides an example of using concordance coefficient when ranks are tied and discusses limitations of using rank correlation methods as a tool for evaluating the degree of agreement among experts’ opinions.

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Hsieh, Ming-Hong, Po-Chung Ju, Jeng-Yuan Chiou, Yu-Hsun Wang, Jong-Yi Wang, and Cheng-Chen Chang. "Spousal Concordance and Cross-Disorder Concordance of Mental Disorders: A Nationwide Cohort Study." Psychiatry Investigation 19, no. 10 (October 25, 2022): 788–94. http://dx.doi.org/10.30773/pi.2022.0009.

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Objective Although both partners of a married couple can have mental disorders, the concordant and cross-concordant categories of disorders in couples remain unclear. Using national psychiatric population-based data only from patients with mental disorders, we examined married couples with mental disorders to examine spousal concordance and cross-disorder concordance across the full spectrum of mental disorders.Methods Data from the 1997 to 2012 Taiwan Psychiatric Inpatient Medical Claims data set were used and a total of 662 married couples were obtained. Concordance of mental disorders was determined if both spouses were diagnosed with mental disorder of an identical category in the International Classification of Diseases, Ninth Revision, Clinical Modification; otherwise, cross-concordance was reported.Results According to Cohen’s kappa coefficient, the most concordant mental disorder in couples was substance use disorder, followed by bipolar disorder. Depressive and anxiety disorders were the most common cross-concordant mental disorders, followed by bipolar disorder. The prevalence of the spousal concordance of mental disorders differed by monthly income and the couple’s age disparity.Conclusion Evidence of spousal concordance and cross-concordance for mental disorders may highlight the necessity of understanding the social context of marriage in the etiology of mental illness. Identifying the risk factors from a common environment attributable to mental disorders may enhance public health strategies to prevent and improve chronic mental illness of married couples.

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Verbic, Miroslav, and Franc Kuzmin. "Coefficient of structural concordance and an example of its application: Labour productivity and wages in Slovenia." Panoeconomicus 56, no. 2 (2009): 227–40. http://dx.doi.org/10.2298/pan0902227v.

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The article presents the underlying principles, derivation and properties of a simple descriptive measure of concordance between two analogous rank structures that we call the coefficient of structural concordance. It is based upon the idea of Kendall's coefficient of concordance, which we extend to two rank structures. As the coefficient of structural concordance is a pure intergroup measure of concordance, it is designed to complement the Kendall's intragroup coefficient of concordance. We apply this descriptive measure by exploring the relationship between wages and labour productivity in Slovenia for the period 1998-2007. We are able to confirm the hypothesis of high concordance between wages and labour productivity, which indicates a stimulative role of wages in production of market traded goods and services.

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Lin, Lawrence I.-Kuei. "A Concordance Correlation Coefficient to Evaluate Reproducibility." Biometrics 45, no. 1 (March 1989): 255. http://dx.doi.org/10.2307/2532051.

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Lin, Lawrence I.-Kuei. "Assay Validation Using the Concordance Correlation Coefficient." Biometrics 48, no. 2 (June 1992): 599. http://dx.doi.org/10.2307/2532314.

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King, Tonya S., and Vernon M. Chinchilli. "ROBUST ESTIMATORS OF THE CONCORDANCE CORRELATION COEFFICIENT." Journal of Biopharmaceutical Statistics 11, no. 3 (January 1, 2001): 83–105. http://dx.doi.org/10.1081/bip-100107651.

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Dissertations / Theses on the topic "Coefficient of concordance"

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Thivvianesan, Chelliah. "Covariance estimation and hypothesis testing in random coefficient regression models." Thesis, Queensland University of Technology, 1995.

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2

Bourredjem, Abderrahmane. "Contribution à l'inférence sur le coefficient de corrélation intraclasse de concordance dans les études de fiabilité inter-juges." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCK078.

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La fiabilité d'une mesure fait référence à sa reproductibilité lorsqu'elle est répétée de manière aléatoire sur le même sujet et constitue une propriété métrologique clé pour toutes les mesures. Le coefficient de corrélation intra-classe de concordance à deux voies (ICCa) est un paramètre statistique utilisé pour quantifier la fiabilité inter-observateurs des mesures continues (ou qualitatives ordinales). Il constitue un indice de fiabilité central recommandé par les agences réglementaires. Néanmoins, ses estimateurs sont biaisés et de nombreuses solutions ont été essayées pour améliorer son intervalle de confiance (IC). Les travaux les plus récents indiquent qu'aucune méthode ne fonctionne bien en cas de non-normalité des données, difficilement détectable à partir des observations, et lorsque le nombre de sujets ou d'évaluateurs est limité, ce qui est plutôt le cas en pratique. De plus, aucune transformation de stabilisation de la variance (VST) ni aucun test de comparaison statistique ne sont disponibles pour l'ICCa. L'objectif de cette thèse est donc de contribuer au développement de méthodes palliant le manque d'outils inférentiels pour l'ICCa. Dans un premier temps, nous proposons de nouvelles méthodes asymptotiques pour l'intervalle de confiance de l'ICCa, le calcul de la taille de l'échantillon des sujets et des évaluateurs, et un test de rapport de vraisemblance pour comparer deux ICCa. Ensuite, dans un deuxième travail, nous développons trois VST, améliorant les propriétés de l'intervalle de confiance pour les études de fiabilité inter-évaluateurs de taille modérée, et la synthèse de plusieurs ICCa dans le contexte de méta-analyses. Enfin, dans un troisième travail, des méthodes de rééchantillonnage spécifiques sont proposées, en combinaison avec la meilleure VST, pour améliorer les performances de l'intervalle de confiance de l'ICCa sans l'hypothèse de normalité et avec de petits échantillons. Il s'agit d'un travail de méthodologie biostatistique, avec des évaluations par simulation des méthodes introduites, et des applications à plusieurs jeux de données réelles issues d'études de fiabilité inter-évaluateurs et de méta-analyses
Measurement's reliability refers to its reproducibility when it is randomly repeated on the same subject and is a key metrological property for each measurement validation. The two-way intra-class correlation coefficient of agreement (ICCa) is a statistical parameter used to quantify the inter-rater reliability of continuous (or ordinal qualitative) measurements. It constitute a central reliability index recommended by the regulatory agencies. Nevertheless, its estimators are biased and a lot of solutions have been tried facing to its confidence interval (CI) problem. The latest works indicate that no method works well with a hard-to-detect violation of normality and when the number of subjects OR raters is limited, which is rather the case in practice. Furthermore, no variance stabilizing transformation (VST) nor statistical comparative test are available for the ICCa. The aim of this thesis is therefore to contribute to the development of methods that remedy the lack of the inferential tools for the ICCa. At a first step, we propose new asymptotic methods for the ICCa confidence interval, the calculation of the needed sample size of subjects and raters, and a likelihood ratio test to compare two ICCa. Then, in a second work, we develop three VSTs, improving the properties of the confidence interval for inter-rater reliability studies of moderate sample size, and the synthesis of several ICCa in the context of meta-analyses. Finally, in a third work, dedicated resampling methods are proposed, in combination with the best VST, to improve the ICCa confidence interval performances in case of non-normality with small sample size. It is above all a work of biostatistical methodology, with simulation evaluations of the introduced methods, and applications to several real data sets from inter-rater reliability studies and meta-analyses

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Baloyi, Maggy Tlakale. "The degree of project manager's project system compliance and project performance in Eskom distribution asset creation project execution department in the Limpopo Operating Unit." Thesis, University of Limpopo, 2016. http://hdl.handle.net/10386/2576.

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Thesis (MBA.) -- University of Limpopo, 2016
Project systems allow project managers to carry out work in a professional and well organised manner. These systems are created and maintained to advance project performance. Eskom spends a lot of resources on the creation and maintenance of project systems. The literature on project systems shows that, in spite of advancement in project managements processes, systems and tools, project success has not significantly improved. This problem raises questions about the value and effectiveness of project systems. Therefore this paper reports about the correlation between the degree of project manager’s compliance to project systems and project performance in Eskom Distribution Limpopo Operating Unit. The study looked at the performance of 10 projects and used empirical data on designers, planners, managers and project managers working in Eskom Distribution LOU to measure the compliance level of employees to project systems when carrying out the 10 chosen projects or any other projects not listed. A total of 45 completed questionnaires were analysed. Correlation analysis tests found a negative correlation between project manager’s project systems compliance level and project performance in terms of schedule and cost. The conclusion found was that as the compliance level on project systems increases, project performance decreases. Meaning there is an inversely proportional relationship between project system compliance level and project performance. Additionally, a lower level of knowledge than expected on the project managers, designers, and planners was found. Keywords: Project performance, Project systems, Correlation, Adherence,

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Badia, Folguera David. "Metodología de los mapas de concordancia para la estratificación de variables cuantitativas: aplicación a la asignatura de Medidas Electrónicas." Doctoral thesis, Universitat Ramon Llull, 2012. http://hdl.handle.net/10803/94520.

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Es desenvolupa una metodologia que combina algoritmes exploratoris i iteratius que pren com a base el concepte de concordança del coeficient de correlació W de Kendall. A partir de conjunts complexos d'ítems i les seves puntuacions (activitats d'avaluació, problemes, pràctiques, indicadors de rendiment, mesuraments i, en general, qualsevol variable quantitativa) s'aconsegueixen identificar conjunts concordants, és a dir, estructures explicatives de la dificultat del conjunt de ítems. La lectura d'aquests conjunts es pot fer de dues maneres gràcies a la informació que proporcionen els algoritmes creats: a) Transversal, de manera que els conjunts concordants formen el "esquelet de dificultat" del problema i són, per tant, referències per estudiar la resta de puntuacions en altres ítems. b) Longitudinal, mitjançant l'estudi del que anomenem Mapes de Concordança, els quals mostren l'evolució dels conjunts concordants en anar incorporant elements en cada iteració, i detectant per tant els ítems discordants respecte a conjunts estables donats. L'aplicació d'aquesta metodologia és molt àmplia, i és susceptible de ser posada en pràctica en qualsevol camp de les ciències on es realitzin mesures i es vulgui observar les variacions creuades entre individus. En aquesta investigació s'aplica a l'assignatura de Laboratori de mesures electròniques. Els resultats aporten llum a la manera de millorar les pràctiques existents i de construir-ne de noves en el futur.
Se desarrolla una metodología que combina algoritmos exploratorios e iterativos que toma como base el concepto de concordancia del coeficiente de correlación W de Kendall. A partir de conjuntos complejos de ítems y sus puntuaciones (actividades de evaluación, problemas, prácticas, indicadores de rendimiento, mediciones y, en general, cualquier variable cuantitativa) se consiguen identificar conjuntos concordantes, es decir, estructuras explicativas de la dificultad del conjunto de ítems. La lectura de estos conjuntos puede hacerse de dos maneras gracias a la información que proporcionan los algoritmos creados: a) Transversal, de manera que los conjuntos concordantes forman el “esqueleto de dificultad” del problema y son, por tanto, referencias para estudiar el resto de puntuaciones en otros ítems. b) Longitudinal, mediante el estudio de lo que denominamos Mapas de Concordancia, los cuales muestran la evolución de los conjuntos concordantes al ir incorporando ítems en cada iteración, y detectando por tanto los ítems discordantes respecto a conjuntos estables dados. La aplicación de dicha metodología es muy amplia, siendo susceptible de ser puesta en práctica en cualquier campo de las ciencias donde se realicen mediciones y se quiera observar las variaciones cruzadas entre individuos. En la presente investigación se aplica a la asignatura de Laboratorio de medidas electrónicas. Los resultados arrojan luz sobre la manera de mejorar las prácticas existentes y de construir otras nuevas en el futuro.
We have developed a new methodology that combines both exploratory and iterative algorithms which is based on the concept of concordance of the correlation coefficient W of Kendall. Starting from complex sets of items and their scores (assessment activities, problems, practices, performance indicators, measurements and, in general, any quantitative variable) it is possible to identify consistent sets, i.e., structures that explain the difficulty of the set of items. Reading these sets can be done in two different ways thanks to the information provided by the algorithms created: a) Transversal, so that the concordant sets form the "backbone difficulty" of the problem and, therefore, they become references to study the remaining scores on other items. b) Longitudinal, by studying what we call concordance maps, which show the evolution of the consistent sets when new items are incorporated after each iteration and thus detecting the discordant items with regard to given stable sets. The application of this methodology is very broad, being useful in any field of science where measurements are carried out and you may want to see cross-variations among individuals. In this research it has been applied to the subject Electronic Measurements Laboratory. The results point to different ways to improve the existing practices and create new ones in the future.

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Hiriote, Sasiprapa Chinchilli Vernon M. "Multivariate concordance correlation coefficient." 2009. http://etda.libraries.psu.edu/theses/approved/PSUonlyIndex/ETD-4104/index.html.

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Chen, Chia-Cheng. "Assessing agreement with intraclass correlation coefficient and concordance correlation coefficient." 2009. http://www.lib.ncsu.edu/theses/available/etd-05202009-163011/unrestricted/etd.pdf.

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Huang, Jing-Lin, and 黃景麟. "Comparison of concordance correlation coefficient via variance components and U-statistics." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/83737059159130042639.

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碩士
國立彰化師範大學
統計資訊研究所
102
In clinical studies, we concern with assessing agreement between different observers or methods. The concordance correlation coefficient (CCC) and intraclass correlation coefficient (ICC) are the two popular indices for measuring agreement on continuous data. In linear mixed models, the equivalence between ICC and CCC can be established through variance components (VC). In this thesis, we focus on estimating CCC using VC and U-statistics approaches. Simulation studies are conducted to compare the performance of VC and U-statistics approaches with and without explanatory variables. An application of conformity between two optometric devices is used for illustration.

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Сорока, Юлія Юріївна, and Yuliia Yuriivna Soroka. "Залежність типу темпераменту дітей раннього віку від типу темпераменту їхніх батьків." Master's thesis, 2020. http://repository.sspu.edu.ua/handle/123456789/9670.

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З використанням кореляційного та генеалогічного аналізу оцінено рівень подібності дітей і батьків за типом темпераменту. У асоціації темпераменту у батьків та дітей виявлений материнський ефект.
The level of similarity between children and parents by their type of temperament is rated using the correlation and genealogical analysis. In the association of temperament in parents and children the maternal effect is revealed.

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Chiu, Ying-Lin, and 邱瑩琳. "Estimating concordance correlation coefficients by variance components for longitudinal Poisson data." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/73pj8p.

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碩士
國立彰化師範大學
統計資訊研究所
106
The concordance correlation coefficient (CCC) is an indice that can measure the agreement between observers. In the past, the classical concordance correlation coefficient is applied to measure the agreement between two observers with continuous data. However, it is common that we need to assess the agreement among multiple observers for discrete responses in clinical research. In this paper, we introduce how to use a variance components (VC) method to assess the agreement among multiple observers for countable replicated readings. We assume that under a three-way generalized linear mixed model, the subject effect, the subject-by-observer interaction effect and the subject-by-time interaction effect are assumed as random effects, while the observer effect, the time effect and the observer-by-time interaction are assumed to be fixed. In the simulation studies, we use the VC approach to assess the intra- and inter- and total-CCCs and compare the performance of VC and U-Statistics (US) methods. It is concluded that no matter what sample size is used, the mean square errors of VC are smaller than those of US, and the 95% coverage rates of VC remain at the nominal coverage. Finally, an application of reproducibility of corticospinal diffusion tensor tractography study is illustrated.

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Hsiao, Yao-Hsuan, and 蕭瑤軒. "Using the variance components method with model selection to estimate concordance correlation coefficients." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/u77g6t.

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碩士
國立彰化師範大學
統計資訊研究所
105
Variance components (VC) is an approach for estimating concordance correlation coefficients (CCC) adjusting for covariates, and allowing dependency between replicated samples. However, under VC, a model including all potential explanatory variables may lead to biased parameter estimates. To overcome this problem, the estimation of CCC using the VC approach, as well as applying the conditional Akaike information criterion (CAIC) and conditional Bayesian information criterion (CBIC) for model selection is applied. Simulation studies are conducted to compare linear mixed models (LMM), with and without model-selection via CAIC and CBIC, and we use three indices of intra-, inter- and total concordance correlation coefficients (CCCs) among multiple observers to evaluate agreement for continuous replicated readings. Two applications are illustrated: an assessment of conformity between three optometric devices and an evaluation of agreement in degree of myopia for monozygotic twins.

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Books on the topic "Coefficient of concordance"

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Soelberg, Peer. Causal Inference from Cross-Lagged Correlation Coeficients: Fact or Fancy? Creative Media Partners, LLC, 2018.

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Book chapters on the topic "Coefficient of concordance"

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Dickhaus, Thorsten. "Self-concordant Profile Empirical Likelihood Ratio Tests for the Population Correlation Coefficient: A Simulation Study." In Springer Proceedings in Mathematics & Statistics, 253–60. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13881-7_28.

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"concordance coefficient." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 271. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_33865.

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"coefficient of concordance." In Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 248. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_33001.

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"Kendall's Coefficient of Concordance." In Handbook of Parametric and Nonparametric Statistical Procedures. Chapman and Hall/CRC, 2003. http://dx.doi.org/10.1201/9781420036268.ch31.

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Dodge, Yadolah. "M." In The Oxford Dictionary Of Statistical Terms, 247–79. Oxford University PressOxford, 2003. http://dx.doi.org/10.1093/oso/9780198509943.003.0013.

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Abstract M-estimator See Huber estimator. m-ankings, problem of Given m rankings of, say, n objects the problem arises of finding some measure of the general agreement between the rankings and of testing its significance. One such measure is termed the coefficient of concordance.

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Sheskin, David J. "Kendall’s Coefficient of Concordance (Nonparametric Measure of Association/Correlation Employed with Ordinal Data)." In Handbook of Parametric and Nonparametric Statistical Procedures, 1399–413. Chapman and Hall/CRC, 2020. http://dx.doi.org/10.1201/9780429186196-41.

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Martínez-Sarmiento, Daniela Alejandra, María Emily Triana-Jiménez, María Lucía Blanco-Parga, Juliana Martínez-Cárdenas, Valeria Valentina Palencia-Amaya, Luz Adriana Penagos-Fajardo, Jhon Erick Chacón-Ruiz, et al. "Pertinencia y conveniencia de dos videojuegos para estimular las funciones ejecutivas en adultos con deterioro cognitivo leve." In Semilleros: contribuciones investigativas desde la psicología a realidades sociales en Colombia, 41–56. Editorial Universidad Católica de Colombia, 2021. http://dx.doi.org/10.14718/9789585133884.2021.2.

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Computerized cognitive training is a methodology that is applied in neuropsychological rehabilitation processes; in recent years there has been a growing interest in adapting it to the needs of older adults diagnosed with mild cognitive impairment. The purpose of this chapter is to describe the content validation process of two games that are part of this module, one aimed at cognitive planning and the other at working memory. In the validation process, the Delphi method was adapted, with the participation of five expert judges in the topics of cognition, neuropsychology and clinical psychology. In relation to the results, the concordance index was 0.80, which was obtained through the rWG coefficient. In general, terms the games were consistent with the theoretical and methodological foundation selected, which allows them to be enabled as instruments to stimulate cognitive planning and working memory in older adults.

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Shevchuk, Oleksandr, and Svitlana Kiporenko. "FINANCIAL SUSTAINABILITY OF AGRICULTURAL ENTERPRISES: DEVELOPMENT AND APPROVAL OF THE INTEGRATED EVALUATION MODEL." In Global trends and prospects of socio-economic development of Ukraine. Publishing House “Baltija Publishing”, 2022. http://dx.doi.org/10.30525/978-9934-26-193-0-14.

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The methodological and practical bases of integrated assessment of the financial condition of an agricultural enterprise are considered in the work. It is emphasized that the integrated method of assessment is the most objective for such an analysis, as it allows you to quantify and evaluate the relationship between the main factors and predict their level in the future. An expert method was used to determine the system of basic relative indicators for assessing the level of financial stability of the enterprise and their ratios. Verification of co-ordination of opinions of experts was conducted by the method of grade correlation with a calculation to the Kendall’s coefficient of concordance and determination of statistical importance of opinions of experts on the Pearson criterion χ2. The normative values of indicators were also adapted in accordance with the specifics of the industry and modern operating conditions. The values of the standards were determined on the basis of the results of financial and economic activities of the most efficient enterprises in the region, selected by the method of rating and scoring. Approbation of the developed model of financial condition assessment was carried out on the basis of financial reporting data of agricultural enterprises of Vinnytsia district for five years. The obtained results of calculations were used to check the presence of multicollinearity of factor features, which allowed to establish linearly dependent groups of relative indicators and to optimize the proposed model accordingly. A detailed econometric analysis of a number of dynamics of the integrated indicator of financial stability over ten years was conducted on the example of the most successful agricultural enterprise of Vinnytsia district. Theoretically and practically checked the presence of anomalous levels; the presence of a trend is determined; smoothing and alignment of a number of dynamics is carried out; the trend model is selected and its parameters are calculated; the trend model for adequacy, accuracy and presence of autocorrelation of residues is investigated; point and interval forecasting was carried out.

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Conference papers on the topic "Coefficient of concordance"

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Lubenets, Yuri V., and Artem Miroshnikov. "Weighted Alternative Coefficient of Concordance." In 2023 5th International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA). IEEE, 2023. http://dx.doi.org/10.1109/summa60232.2023.10349435.

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Lubenets, Yuri V., and Artem Miroshnikov. "Using an Alternative Coefficient of Concordance for Features Clustering." In 2022 4th International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA). IEEE, 2022. http://dx.doi.org/10.1109/summa57301.2022.9974028.

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Xu, Weichao, Zhaoguo Chen, and Wenqing Liu. "A new coefficient of concordance with applications to biosignal analysis." In Ninth International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2015), edited by Jianguo Liu and Hong Sun. SPIE, 2015. http://dx.doi.org/10.1117/12.2210993.

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Pandit, Vedhas, and Björn Schuller. "The many-to-many mappings between the concordance correlation coefficient, the mean square error and the correlation coefficient." In INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS: ICNAAM2022. AIP Publishing, 2024. http://dx.doi.org/10.1063/5.0213755.

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Scheidsteger, Thomas, Robin Haunschild, and Lutz Bornmann. "How similar are field-normalized scores from different free or commercial databases calculated for large German universities?" In 27th International Conference on Science, Technology and Innovation Indicators (STI 2023). International Conference on Science, Technology and Innovation Indicators, 2023. http://dx.doi.org/10.55835/6441118c643beb0d90fc543f.

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We compared field-normalized citation scores from the freely available bibliographic database OpenAlex with those from three commercial databases (Web of Science, Scopus, and Dimensions). The scores have been calculated for nearly 335,000 publications published by 48 German universities in four OECD subject areas between 2013 and 2017. We found varying but - overall - strong agreement according to Lin's concordance coefficient. We also calculated (aggregated) mean normalized citation scores for the 48 universities and found that the agreements across different databases are low. On the one hand, the results suggest that comparisons of universities using field-normalized citation scores across different databases should be avoided. On the other hand, the difference of the concordance coefficients on the paper and university level is a good example for the problem of ecological fallacy in bibliometrics: The mean impact is not representative for the single papers’ impact in the set.

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Gautam, Triambica, Amit Srivastava, and Shruti Jain. "Data Envelopment Analysis and Kendell’s Coefficient of Concordance for Efficiency Evaluation of State Co-operative Banks." In 2022 5th International Conference on Multimedia, Signal Processing and Communication Technologies (IMPACT). IEEE, 2022. http://dx.doi.org/10.1109/impact55510.2022.10029189.

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Harpa, Rodica, Cristina Piroi, and Irina Cristian. "STAT-CONCOR: SOFTWARE FOR VALIDATING THE PANEL OF ASSESSORS, SUBSEQUENTLY TO THE FABRIC HAND EVALUATION." In eLSE 2017. Carol I National Defence University Publishing House, 2017. http://dx.doi.org/10.12753/2066-026x-17-237.

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In previous papers, the STAT-HAND (Statistical Analysis for Hand) original software was developed and a case study of practical use was presented for the fabrics’ hand evaluation by means of blind tactile sensory feeling. STAT-HAND is an interactive ICT-based learning tool that helps students acting as evaluators during the laboratory activities performed within the course "Systems and Equipment for the Textile Products' Quality Assurance", from the master curriculum delivered at the Faculty of Textile, Leather and Industrial Management – Iasi. However, without minimizing the related issues of the fabrics' subjective evaluation and the importance of the panel with experts, textile students (regardless of the specialty and the study year) must be able to make connections between the product design and the sensory comfort expected for a specified end use. Therefore, for the discipline "Quality assurance in weaving”, the students from the fourth year of study have to develop strategies for the quality control of fabrics according to a specified destination, paying attention to the selection of the specific measuring processes for the objective evaluation of fabrics. In this context, it is also considered useful for teaching students about the primary handle attributes and the subjective evaluation of fabrics hand, with the support of the STAT-HAND software. Subsequently to the fabric hand evaluation, a statistical analysis was required to prove the reliability of the students’ panel and the connection between the subjective and the objective evaluations they carried out. Therefore, for the next stage regarding the topics of subjective and objective evaluation, it was necessary to develop STAT-ConCor (Statistical Analysis for Concordance and Correlation). This software includes two facilities developed in accordance with two algorithms for calculating the Kendall and Spearman coefficients. STAT-Con uses Kendall’s coefficient of concordance calculation as a measure of emphasizing the agreement/disagreement among evaluators within the panel. STAT-Cor uses Spearman’s coefficient of correlation calculation as a measure of emphasizing the level of correlation between the subjective and objective evaluation.

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Barbu, Ionel. "THE PROGRAM FOR EXPERIMENTAL DATA PROCESSING IN COTTON SPINNING MILL." In eLSE 2018. Carol I National Defence University Publishing House, 2018. http://dx.doi.org/10.12753/2066-026x-18-159.

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The quality improvement is essential for every textile enterprise. The optimization of quality could be possible only by using the best materials. The quality of products for customer reflects the materials used in factory, the cycle of production, the processing of each technological line and also the maintenance of machines on the entire technological line. If one of these criterions is neglected, the quality expected by the customer won't be the optimal one. The notion of optimization is adopted relative because the company will be able to secure better materials, to hire a larger staff, to replace the parts of the machines more often. Only these measures will improve the quality, but the real rise of costs could catapult the company out from the market. The lab and the technical service have to be capable of supervising the whole cycle of production in different ways. The success of improving will be assured only by learning the causes of different imperfections of semi-finished products and goods. The main objective is the control of the causes and not of the effects. It is also necessary to out run the primary data a little over the general informing level. The statistics methods permit the value of every individual characteristic on each fabrication cycle. When the fabrication cycle is improved the statistic limits are also more precise. The STATTEX program is very useful for physical and mechanical labs for determination of the fibers physical-mechanical characteristics while the reception on new materials is done, for determination of the semi-finished products characteristics and also for processing of the data from analysis report elaborated for each 3000 kg lot of fibers or any time when it's necessary. The STATTEX program solved the following problems: - Reading of experimental data; - Arrangements of the pool data; - Elimination of the aberrant values using the Dixon or Grubbs tests depending on the sample volume and after then their visualization; - Presents a report for the remaining values; - Lists this report on printer; - Calculates the valid values and their classification; - Testing the concordance between experimental and normal distribution by using the concordance c2 or the Kolmogorov-Smirnov tests depending on sample volume; - Allows the option for listing a report on printer which contains the helping table for the concordance tests; - Graphic representations: - The histogram - The polygon of the relative frequencies - The polygon of the absolute frequencies - The diagram of the cumulate frequencies - Allows the option to list the graphic representations on the printer - Calculates the typical poll values (arithmetical average, median line, mood value, amplitude, dispersion, the average square deviation, the coefficient of variation, the absolute average deviation, the coefficient of linear irregularity, the coefficient of asymmetry, the coefficient of vaulting and the excess); - Allows the option for listing the VTS report that contains the typical poll values calculated previously for interpreting the results.

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Moreto-Planas, L., MJ Sagrado, R. Mahajan, J. Gallo, E. Biague, R. Goncalves, P. Nuozzi, et al. "Can point-of-care ultrasound support tuberculosis diagnosis in children? The experience of MSF in Guinea-Bissau." In MSF Scientific Days International 2022. NYC: MSF-USA, 2022. http://dx.doi.org/10.57740/b8m1-p572.

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INTRODUCTION Tuberculosis (TB) is an important cause of morbidity and mortality in children and over 50% of childhood TB remains undiagnosed every year. As microbiological confirmation is low (<30%), the majority of cases in low and middle-income countries are diagnosed on clinical grounds. Point-of-care ultrasound (POCUS) is a non-invasive bedside tool, and TB-focused POCUS has been validated for diagnosis of TB in adults with HIV. We aimed to describe the performance and findings of TB-focused POCUS for children with presumptive TB at a tertiary care hospital in Guinea- Bissau, a setting with a high burden of HIV, malnutrition and TB. METHODS This observational study took place at Simão Mendes hospital in Bissau, from July 2019 to April 2020. Patients aged between 6 months and 15 years with presumptive TB underwent clinical and laboratory assessment, with at least one sample analysed with GeneXpert Ultra, and unblinded clinician-performed POCUS evaluation. POCUS was used to assess for subpleural nodules (SUN’s), lung consolidation, pleural effusion, pericardial effusion, ascites, liver and splenic focal lesions, and abdominal lymph nodes. Presence of any of these signs prompted a POCUS- positive result. Images and clips were evaluated by an expert reviewer and, if discordant, by a second expert reviewer. ETHICS This study was approved by the MSF Ethics Review Board (ERB) and by the Guinea-Bissau Ministry of Health ERB. RESULTS A total of 139 children were enrolled, with 62 (45%) female and 55 (40%) aged under 5 years. HIV infection and severe acute malnutrition (SAM) were found in 59 (42%) and 83 (60%) of patients, respectively. Confirmation of TB was achieved in 27 (19%); 62 (45%) had unconfirmed TB, and 50 (36%) had unlikely TB. Children with TB were more likely to have a POCUS positive result (83/89; 93%) as compared to children with unlikely TB (17/50; 34%). The most common POCUS signs in TB patients were: lung consolidation (51; 57%), SUN’s (49; 55%), pleural effusion (27; 30%), and focal splenic lesions (25; 28%). In children with confirmed TB (n=27), POCUS sensitivity was 85.2% (95% confidence interval (CI) 67.5-94.1). In those with unlikely TB (n=50), specificity was 66% (95%CI 2.2-77.6). Unlike HIV infection, SAM was associated with higher risk of positive POCUS. Cohen’s kappa coefficient for concordance between field and expert reviewers ranged from 0.6 to 0.9 depending on the POCUS sign, while overall POCUS concordance was 0.8. CONCLUSION We found high prevalence of any POCUS sign in children with TB, as compared to children with unlikely TB. POCUS positivity was independent of HIV status, but not of nutritional status. POCUS concordance between field and expert reviewers was moderate to high. TB-focused POCUS could potentially play a supportive role in the diagnosis of TB in children. CONFLICTS OF INTEREST None declared.

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Guder, Larissa, João Paulo Aires, Felipe Meneguzzi, and Dalvan Griebler. "Dimensional Speech Emotion Recognition from Bimodal Features." In Simpósio Brasileiro de Computação Aplicada à Saúde. Sociedade Brasileira de Computação - SBC, 2024. http://dx.doi.org/10.5753/sbcas.2024.2779.

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Considering the human-machine relationship, affective computing aims to allow computers to recognize or express emotions. Speech Emotion Recognition is a task from affective computing that aims to recognize emotions in an audio utterance. The most common way to predict emotions from the speech is using pre-determined classes in the offline mode. In that way, emotion recognition is restricted to the number of classes. To avoid this restriction, dimensional emotion recognition uses dimensions such as valence, arousal, and dominance to represent emotions with higher granularity. Existing approaches propose using textual information to improve results for the valence dimension. Although recent efforts have tried to improve results on speech emotion recognition to predict emotion dimensions, they do not consider real-world scenarios where processing the input quickly is necessary. Considering these aspects, we take the first step towards creating a bimodal approach for dimensional speech emotion recognition in streaming. Our approach combines sentence and audio representations as input to a recurrent neural network that performs speechemotion recognition. Our final architecture achieves a Concordance Correlation Coefficient of 0.5915 for arousal, 0.1431 for valence, and 0.5899 for dominance in the IEMOCAP dataset.

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Reports on the topic "Coefficient of concordance"

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Ye, Feifei. Validity, Reliability, and Concordance of the Duolingo English Test. Duolingo, May 2014. http://dx.doi.org/10.46999/eixn6416.

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Duolingo has developed a computer adaptive test of English competency for non-native English learners. This research study of the validity and reliability of the Duolingo English Test was independently conducted from February-April of 2014. The study lasted for approximately eight weeks. Participants were recruited from Duolingo users who studied English, international students in several United States universities, and people who took Test of English as Foreign Language (TOEFL) at several TOEFL centers in China. Participants were at least 18 years of age and had taken the TOEFL within the last 18 months. Participants filled out a survey in the beginning of the study to provide information of their demographics such as age, gender, native language, and education background, experience in learning English, and most importantly, the date and location of taking the TOEFL iBT as well al their TOEFL scores. The participants were directed to complete the Duolingo English Test at the end of the survey. Two weeks later, the participants were instructed via email to fill out a second survey and the Duolingo English Test for the second time. Main results: • Participants’ scores on the Duolingo English Test correlated substantially with their TOEFL total scores, and moderately with TOEFL section scores, with higher correlations for the TOEFL Speaking and Writing sections. This provides criterionrelated evidence of validity of the Duolingo test scores. • Participants’ scores on the first Duolingo English Test correlated highly with their scores on a second test two weeks later, indicating that Duolingo test scores are reliable with a good test-retest reliability coefficient. • Duolingo English Test scores were linked with TOEFL total scores to find the comparable scores from the two tests that have similar percentile rank. Duolingo English Test scores are on a scale of 0–100 and TOEFL scores are on a scale of 0–120. For international students to apply for studying in US universities, the minimum cut-off score of TOEFL iBT is 80 and a more selective cut-off score is 100, corresponding to scores 50 and 72 respectively on the Duolingo English Test.

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Weller, Joel I., Derek M. Bickhart, Micha Ron, Eyal Seroussi, George Liu, and George R. Wiggans. Determination of actual polymorphisms responsible for economic trait variation in dairy cattle. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600017.bard.

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The project’s general objectives were to determine specific polymorphisms at the DNA level responsible for observed quantitative trait loci (QTLs) and to estimate their effects, frequencies, and selection potential in the Holstein dairy cattle breed. The specific objectives were to (1) localize the causative polymorphisms to small chromosomal segments based on analysis of 52 U.S. Holstein bulls each with at least 100 sons with high-reliability genetic evaluations using the a posteriori granddaughter design; (2) sequence the complete genomes of at least 40 of those bulls to 20 coverage; (3) determine causative polymorphisms based on concordance between the bulls’ genotypes for specific polymorphisms and their status for a QTL; (4) validate putative quantitative trait variants by genotyping a sample of Israeli Holstein cows; and (5) perform gene expression analysis using statistical methodologies, including determination of signatures of selection, based on somatic cells of cows that are homozygous for contrasting quantitative trait variants; and (6) analyze genes with putative quantitative trait variants using data mining techniques. Current methods for genomic evaluation are based on population-wide linkage disequilibrium between markers and actual alleles that affect traits of interest. Those methods have approximately doubled the rate of genetic gain for most traits in the U.S. Holstein population. With determination of causative polymorphisms, increasing the accuracy of genomic evaluations should be possible by including those genotypes as fixed effects in the analysis models. Determination of causative polymorphisms should also yield useful information on gene function and genetic architecture of complex traits. Concordance between QTL genotype as determined by the a posteriori granddaughter design and marker genotype was determined for 30 trait-by-chromosomal segment effects that are segregating in the U.S. Holstein population; a probability of <10²⁰ was used to accept the null hypothesis that no segregating gene within the chromosomal segment was affecting the trait. Genotypes for 83 grandsires and 17,217 sons were determined by either complete sequence or imputation for 3,148,506 polymorphisms across the entire genome. Variant sites were identified from previous studies (such as the 1000 Bull Genomes Project) and from DNA sequencing of bulls unique to this project, which is one of the largest marker variant surveys conducted for the Holstein breed of cattle. Effects for stature on chromosome 11, daughter pregnancy rate on chromosome 18, and protein percentage on chromosome 20 met 3 criteria: (1) complete or nearly complete concordance, (2) nominal significance of the polymorphism effect after correction for all other polymorphisms, and (3) marker coefficient of determination >40% of total multiple-regression coefficient of determination for the 30 polymorphisms with highest concordance. The missense polymorphism Phe279Tyr in GHR at 31,909,478 base pairs on chromosome 20 was confirmed as the causative mutation for fat and protein concentration. For effect on fat percentage, 12 additional missensepolymorphisms on chromosome 14 were found that had nearly complete concordance with the suggested causative polymorphism (missense mutation Ala232Glu in DGAT1). The markers used in routine U.S. genomic evaluations were increased from 60,000 to 80,000 by adding markers for known QTLs and markers detected in BARD and other research projects. Objectives 1 and 2 were completely accomplished, and objective 3 was partially accomplished. Because no new clear-cut causative polymorphisms were discovered, objectives 4 through 6 were not completed.

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