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Journal articles on the topic 'Kappa coefficient'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

Lin, Yuan Horng. "Fuzzy Kappa Coefficient with Simulated Comparisons." Applied Mechanics and Materials 303-306 (February 2013): 372–75. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.372.

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The purpose of this study is to provide a new Kappa coefficient based on fuzzy scoring. This new Kappa is called fuzzy Kappa. Fuzzy theory has been widely used in quantitative research and many researches indicate its positive utility. Moreover, viewpoints of measurement according to fuzzy theory conform to the thinking of human thoughts. Therefore, it is feasible to measure the scoring of decision-making or judgment. In addition, Kappa coefficient is one kind of rater reliability and it is to measure the consistency on judgment among raters. Traditional Kappa coefficient is based on the crisp

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Thompson, W. Douglas, and Stephen D. Walter. "A rEAPPRAISAL OF THE KAPPA COEFFICIENT." Journal of Clinical Epidemiology 41, no. 10 (1988): 949–58. http://dx.doi.org/10.1016/0895-4356(88)90031-5.

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Warrens, Matthijs J. "New Interpretations of Cohen’s Kappa." Journal of Mathematics 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/203907.

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Cohen’s kappa is a widely used association coefficient for summarizing interrater agreement on a nominal scale. Kappa reduces the ratings of the two observers to a single number. With three or more categories it is more informative to summarize the ratings by category coefficients that describe the information for each category separately. Examples of category coefficients are the sensitivity or specificity of a category or the Bloch-Kraemer weighted kappa. However, in many research studies one is often only interested in a single overall number that roughly summarizes the agreement. It is sho

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De Raadt, Alexandra, Matthijs J. Warrens, Roel J. Bosker, and Henk A. L. Kiers. "Kappa Coefficients for Missing Data." Educational and Psychological Measurement 79, no. 3 (2019): 558–76. http://dx.doi.org/10.1177/0013164418823249.

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Cohen’s kappa coefficient is commonly used for assessing agreement between classifications of two raters on a nominal scale. Three variants of Cohen’s kappa that can handle missing data are presented. Data are considered missing if one or both ratings of a unit are missing. We study how well the variants estimate the kappa value for complete data under two missing data mechanisms—namely, missingness completely at random and a form of missingness not at random. The kappa coefficient considered in Gwet ( Handbook of Inter-rater Reliability, 4th ed.) and the kappa coefficient based on listwise de

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Kvålseth, Tarald O. "Measurement of Interobserver Disagreement: Correction of Cohen’s Kappa for Negative Values." Journal of Probability and Statistics 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/751803.

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As measures of interobserver agreement for both nominal and ordinal categories, Cohen’s kappa coefficients appear to be the most widely used with simple and meaningful interpretations. However, for negative coefficient values when (the probability of) observed disagreement exceeds chance-expected disagreement, no fixed lower bounds exist for the kappa coefficients and their interpretations are no longer meaningful and may be entirely misleading. In this paper, alternative measures of disagreement (or negative agreement) are proposed as simple corrections or modifications of Cohen’s kappa coeff

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Gjørup, Thomas. "The Kappa Coefficient and the Prevalence of a Diagnosis." Methods of Information in Medicine 27, no. 04 (1988): 184–86. http://dx.doi.org/10.1055/s-0038-1635539.

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SummaryThe kappa coefficient is a widely used measure of agreement between observers’ independent recording of diagnoses. Kappa adjusts the overall agreement for expected chance agreement. The dependence of kappa on the prevalence . of a diagnosis has not previously been emphasized. This dependence means that kappa does not give a general statement of the reproducibility of a diagnosis. The result of a study of observer agreement should, therefore, not – as it has been done in several studies – be given by the kappa value alone. The kappa value should always be given together with the original

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Nguyen, Loc. "A Fast Computational Formula for Kappa Coefficient." Science Journal of Clinical Medicine 4, no. 1 (2015): 1. http://dx.doi.org/10.11648/j.sjcm.20150401.11.

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Vanbelle, Sophie. "Asymptotic variability of (multilevel) multirater kappa coefficients." Statistical Methods in Medical Research 28, no. 10-11 (2018): 3012–26. http://dx.doi.org/10.1177/0962280218794733.

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Agreement studies are of paramount importance in various scientific domains. When several observers classify objects on categorical scales, agreement can be quantified through multirater kappa coefficients. In most statistical packages, the standard error of these coefficients is only available under the null hypothesis that the coefficient is equal to zero, preventing the construction of confidence intervals in the general case. The aim of this paper is triple. First, simple analytic formulae for the standard error of multirater kappa coefficients will be given in the general case. Second, th

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Lipsitz, Stuart R., Nan M. Laird, Troyen A. Brennan, and Michael Parzen. "Estimating the kappa-coefficient from a Selected Sample." Journal of the Royal Statistical Society: Series D (The Statistician) 50, no. 4 (2001): 407–16. http://dx.doi.org/10.1111/1467-9884.00286.

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Luz, Laércio Lima, Lívia Maria Santiago, João Francisco Santos da Silva, and Inês Echenique Mattos. "Psychometric properties of the Brazilian version of the Vulnerable Elders Survey-13 (VES-13)." Cadernos de Saúde Pública 31, no. 3 (2015): 507–15. http://dx.doi.org/10.1590/0102-311x00011714.

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This study aims to assess the psychometric properties of the Brazilian version of the Vulnerable Elders Survey-13 (VES-13). Interviews were carried out with individuals aged 60 years and over receiving care at an ambulatory cancer centre. Test-retest reliability was assessed using the Spearman correlation coefficient, intraclass correlation coefficients and Cohen's kappa coefficient. Construct validity was assessed by testing convergent and discriminant validity using principal component analysis and Varimax rotation. The Spearman correlation coefficient value of the comparison between test an

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Jumniensuk, Chayanit, Alexander Nobori, Thomas Lee, T. Niroshi Senaratne, Dinesh Rao, and Sheeja Pullarkat. "Concordance of Peripheral Blood and Bone Marrow Next-Generation Sequencing in Hematologic Neoplasms." Advances in Hematology 2022 (March 26, 2022): 1–6. http://dx.doi.org/10.1155/2022/8091746.

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Objective. Mutational analysis by next-generation sequencing (NGS) obtained by peripheral blood NGS has been of clinical interest to use as a minimally invasive screening tool. Our study evaluates the correlation between NGS results on peripheral blood and bone marrow in hematolymphoid disease. Method. We evaluated patients who had NGS for presumed hematologic malignancy performed on peripheral blood and bone marrow within a 1-year interval of each other. We excluded cases in which chemotherapy or bone marrow transplant occurred in the interval between the two tests. The concordance across per

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Srivastava, A., S. Bharadwaj, R. Dubey, V. B. Sharma, and S. Biswas. "MAPPING VEGETATION AND MEASURING THE PERFORMANCE OF MACHINE LEARNING ALGORITHM IN LULC CLASSIFICATION IN THE LARGE AREA USING SENTINEL-2 AND LANDSAT-8 DATASETS OF DEHRADUN AS A TEST CASE." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2022 (May 30, 2022): 529–35. http://dx.doi.org/10.5194/isprs-archives-xliii-b3-2022-529-2022.

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Abstract. In recent years, the data science and remote sensing communities have started to align due to user-friendly programming tools, access to high-end consumer computing power, and the availability of free satellite data. In particular, publicly available data from the European Space Agency’s “Sentinel” and American Earth observation satellite” landsat” missions have been used in various remote sensing applications.Google Earth Engine (GEE) is such a tool that publicly allow the use of these available datasets, there is a large amount of available data in GEE, which are being used for com

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Artstein, Ron, and Massimo Poesio. "Inter-Coder Agreement for Computational Linguistics." Computational Linguistics 34, no. 4 (2008): 555–96. http://dx.doi.org/10.1162/coli.07-034-r2.

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This article is a survey of methods for measuring agreement among corpus annotators. It exposes the mathematics and underlying assumptions of agreement coefficients, covering Krippendorff's alpha as well as Scott's pi and Cohen's kappa; discusses the use of coefficients in several annotation tasks; and argues that weighted, alpha-like coefficients, traditionally less used than kappa-like measures in computational linguistics, may be more appropriate for many corpus annotation tasks—but that their use makes the interpretation of the value of the coefficient even harder.

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Lee, James, and K. P. Fung. "Confidence interval of the kappa coefficient by bootstrap resampling." Psychiatry Research 49, no. 1 (1993): 97–98. http://dx.doi.org/10.1016/0165-1781(93)90033-d.

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von Eye, Alexander, and Maxine von Eye. "Can One Use Cohen’s Kappa to Examine Disagreement?" Methodology 1, no. 4 (2005): 129–42. http://dx.doi.org/10.1027/1614-2241.1.4.129.

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Abstract. This research discusses the use of Cohen’s κ (kappa), Brennan and Prediger’s κn, and the coefficient of raw agreement for the examination of disagreement. Three scenarios are considered. The first involves all disagreement cells in a rater × rater cross-tabulation. The second involves one of the triangles of disagreement cells. The third involves the cells that indicate disagreement by one (ordinal) scale unit. For each of these three scenarios, coefficients of disagreement in the form of κ equivalents are derived. The behavior of the coefficients of disagreement in the three situati

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Roldán-Nofuentes, José Antonio, and Saad Bouh Regad. "Estimation of the Average Kappa Coefficient of a Binary Diagnostic Test in the Presence of Partial Verification." Mathematics 9, no. 14 (2021): 1694. http://dx.doi.org/10.3390/math9141694.

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The average kappa coefficient of a binary diagnostic test is a measure of the beyond-chance average agreement between the binary diagnostic test and the gold standard, and it depends on the sensitivity and specificity of the diagnostic test and on disease prevalence. In this manuscript the estimation of the average kappa coefficient of a diagnostic test in the presence of verification bias is studied. Confidence intervals for the average kappa coefficient are studied applying the methods of maximum likelihood and multiple imputation by chained equations. Simulation experiments have been carrie

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Husidic, Edin, Klaus Scherer, Marian Lazar, Horst Fichtner, and Stefaan Poedts. "Toward a Realistic Evaluation of Transport Coefficients in Non-equilibrium Space Plasmas." Astrophysical Journal 927, no. 2 (2022): 159. http://dx.doi.org/10.3847/1538-4357/ac4af4.

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Abstract Recent studies have outlined the interest for the evaluation of transport coefficients in space plasmas, where the observed velocity distributions of plasma particles are conditioned not only by the binary collisions, e.g., at low energies, but also by the energization of particles from their interaction with wave turbulence and fluctuations, generating the suprathermal kappa-distributed populations. This paper provides a first estimate of the main transport coefficients based on regularized kappa distributions, which, unlike standard kappa distributions (SKDs), enable macroscopic par

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Afhami, Shirin, Mohammad Ali Borumand, Negin Esmailpour Bazzaz, et al. "Antimicrobial resistance pattern of Acinetobacter; a multicenter study, comparing European Committee on Antimicrobial Susceptibility Testing (EUCAST) and the Clinical and Laboratory Standards Institute (CLSI); evaluation of susceptibility testing methods for polymyxin." Immunopathologia Persa 7, no. 1 (2020): e04-e04. http://dx.doi.org/10.34172/ipp.2021.04.

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Introduction: Acinetobacter species in clinical isolates cause severe infections including meningitis, bloodstream infection, ventilator-associated pneumonia, and surgical site infections. Objectives: In the present study, we evaluated Acinetobacter drug resistance using both European Committee on Antimicrobial Susceptibility Testing (EUCAST) and the Clinical and Laboratory Standards Institute (CLSI) antimicrobial susceptibility test methods. Materials and Methods: Clinical specimens of 128 patients who were admitted in three referral tertiary care teaching hospitals were enrolled in 2014. Blo

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Mishra, Durgesh Kumar, Ashutosh Singh, Sunil Mishra, Priti Singh, and Abhishek Singh. "PM3 Method based QSAR Study of the Derivatives of Thiadiazole and Quinoxaline for Antiepileptic Activity using Topological Descriptors." Asian Journal of Organic & Medicinal Chemistry 7, no. 1 (2022): 99–110. http://dx.doi.org/10.14233/ajomc.2022.ajomc-p370.

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QSAR study of the derivatives of thiadiazole and quinoxaline has been performed for the antiepileptic activity using the topological descriptors viz., molar refractivity, shape index (basic kappa, order 1), shape index (basic kappa, order 2), shape index (basic kappa, order 3), valence connectivity index (order 0, standard), valence connectivity index (order 1, standard) and valence connectivity index (order 2, standard). In the best QSAR model, the descriptors are molar refractivity, shape index (basic kappa, order 1), shape index (basic kappa, order 3) and valence connectivity index (order 0

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van Sommeren, Daan D. J. A., C. P. Caulfield, and Andrew W. Woods. "Spatially varying mixing of a passive scalar in a buoyancy-driven turbulent flow." Journal of Fluid Mechanics 742 (February 24, 2014): 701–19. http://dx.doi.org/10.1017/jfm.2014.25.

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AbstractWe perform experiments to study the mixing of passive scalar by a buoyancy-induced turbulent flow in a long narrow vertical tank. The turbulent flow is associated with the downward mixing of a small flux of dense aqueous saline solution into a relatively large upward flux of fresh water. In steady state, the mixing region is of finite extent, and the intensity of the buoyancy-driven mixing is described by a spatially varying turbulent diffusion coefficient $\kappa _v(z)$ which decreases linearly with distance $z$ from the top of the tank. We release a pulse of passive scalar into eithe

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Strube, Michael J. "A general program for the calculation of the kappa coefficient." Behavior Research Methods, Instruments, & Computers 21, no. 6 (1989): 643–44. http://dx.doi.org/10.3758/bf03210592.

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Küchenhoff, Helmut, Thomas Augustin, and Anne Kunz. "Partially identified prevalence estimation under misclassification using the kappa coefficient." International Journal of Approximate Reasoning 53, no. 8 (2012): 1168–82. http://dx.doi.org/10.1016/j.ijar.2012.06.013.

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Chabalala, Yingisani, Elhadi Adam, and Khalid Adem Ali. "Machine Learning Classification of Fused Sentinel-1 and Sentinel-2 Image Data towards Mapping Fruit Plantations in Highly Heterogenous Landscapes." Remote Sensing 14, no. 11 (2022): 2621. http://dx.doi.org/10.3390/rs14112621.

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Mapping smallholder fruit plantations using optical data is challenging due to morphological landscape heterogeneity and crop types having overlapping spectral signatures. Furthermore, cloud covers limit the use of optical sensing, especially in subtropical climates where they are persistent. This research assessed the effectiveness of Sentinel-1 (S1) and Sentinel-2 (S2) data for mapping fruit trees and co-existing land-use types by using support vector machine (SVM) and random forest (RF) classifiers independently. These classifiers were also applied to fused data from the two sensors. Featur

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Eugenio, Barbara Di, and Michael Glass. "The Kappa Statistic: A Second Look." Computational Linguistics 30, no. 1 (2004): 95–101. http://dx.doi.org/10.1162/089120104773633402.

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In recent years, the kappa coefficient of agreement has become the de facto standard for evaluating intercoder agreement for tagging tasks. In this squib, we highlight issues that affect κ and that the community has largely neglected. First, we discuss the assumptions underlying different computations of the expected agreement component of κ. Second, we discuss how prevalence and bias affect the κ measure.

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Selem, Soraya Sant'Ana de Castro, Aline Martins de Carvalho, Eliseu Verly-Junior, et al. "Validity and reproducibility of a food frequency questionnaire for adults of São Paulo, Brazil." Revista Brasileira de Epidemiologia 17, no. 4 (2014): 852–59. http://dx.doi.org/10.1590/1809-4503201400040005.

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OBJECTIVES: To assess the validity and reproducibility of a food frequency questionnaire developed for estimating the food consumption of adults in São Paulo, Brazil, based population study. METHODS: A sample of individuals aged above 20 years, of both genders, living in São Paulo, was used for the validation study (n = 77) and reproducibility study (n = 74) of the food frequency questionnaire. To verify the validity and reproducibility of energy and 19 nutrients were applied two food frequency questionnaires (60 items) and three 24-hour dietary recalls (24HR - reference method). The validity

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Felipe, Beatriz Caio, Fernanda Chiguti Yamashita, Amanda Lury Yamashita, et al. "Problem-based learning in dentistry: Diagnostic capability of dentists in the detection of calcified carotid artery atheroma on digital panoramic radiographs." Research, Society and Development 9, no. 11 (2020): e70991110451. http://dx.doi.org/10.33448/rsd-v9i11.10451.

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Objective: The aim of this study was to evaluate the diagnostic capability of dentists in the identification of suggestive images of calcified carotid artery atheroma (CCAA) on panoramic radiographs (PRs) before and after using a problem-based learning method (PBL). Methodology: Five dentists (no specialists in oral and maxillofacial radiology) analyzed 102 digital PRs divided into: PRs with suggestive images of CCAA (n=51) and without suggestive images of CCAA (n=51). After the first analysis, the examiners attended an activity on soft tissue calcifications using the PBL method. Afterwards, t

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He, Jie, Du Lyu, Liang He, et al. "Combining Object-Oriented and Deep Learning Methods to Estimate Photosynthetic and Non-Photosynthetic Vegetation Cover in the Desert from Unmanned Aerial Vehicle Images with Consideration of Shadows." Remote Sensing 15, no. 1 (2022): 105. http://dx.doi.org/10.3390/rs15010105.

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Soil erosion is a global environmental problem. The rapid monitoring of the coverage changes in and spatial patterns of photosynthetic vegetation (PV) and non-photosynthetic vegetation (NPV) at regional scales can help improve the accuracy of soil erosion evaluations. Three deep learning semantic segmentation models, DeepLabV3+, PSPNet, and U-Net, are often used to extract features from unmanned aerial vehicle (UAV) images; however, their extraction processes are highly dependent on the assignment of massive data labels, which greatly limits their applicability. At the same time, numerous shad

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Skinner, Mark, Chatree Chai-Adisaksopha, Randall Curtis, et al. "VP57 Test-Retest Reliability Analysis Of The Patient Reported Outcomes Burdens And Experiences (PROBE) Study Questionnaire Test-Retest Reliability Analysis Of The PROBE Study Questionnaire." International Journal of Technology Assessment in Health Care 33, S1 (2017): 174–75. http://dx.doi.org/10.1017/s0266462317003361.

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INTRODUCTION:The Patient Reported Outcomes Burdens and Experiences (PROBE) questionnaire was developed with direct patient involvement in questionnaire design, conduct and analysis using patient-centered outcomes to assess health status in patients with hemophilia (PWH). Phase 1 confirmed robustness of the methodology and feasibility. Phase 2a investigated individual test-retest reliability. Phase 2b will explore population level reproducibility.METHODS:PWH and non-PWH individuals who attended a hemophilia-related workshop were asked to complete the PROBE questionnaire 3 times (paper-based sur

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DOĞAN, İsmet, and Nurhan DOĞAN. "Evaluation of Cohen Kappa Coefficient and Distinguishability for Binary Data: A Simulation Study." Turkiye Klinikleri Journal of Biostatistics 14, no. 3 (2022): 190–98. http://dx.doi.org/10.5336/biostatic.2022-89212.

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Islami, F. A., S. D. Tarigan, E. D. Wahjunie, and B. D. Dasanto. "Accuracy Assessment of Land Use Change Analysis Using Google Earth in Sadar Watershed Mojokerto Regency." IOP Conference Series: Earth and Environmental Science 950, no. 1 (2022): 012091. http://dx.doi.org/10.1088/1755-1315/950/1/012091.

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Abstract Mojokerto Regency is one of the regencies in East Java with a high population growth rate of around 0.96%, thus encouraging significant land use changes on built-up areas. Classifying remote sensing imageries to obtain reliable and accurate land use and land cover (LULC) information remains a challenge that depends on many factors such as complexity of the landscape, the remote sensing data selected, image processing, and classification methods. This study examined the accuracy assessment of LULC classification using Google Earth in Sadar Watershed, Mojokerto, East Java Indonesia for

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MORI, Ryota. "A Proposal for Measurement Methods of Mental Models using Kappa Coefficient." Transactions of Japan Society of Kansei Engineering 15, no. 4 (2016): 537–43. http://dx.doi.org/10.5057/jjske.tjske-d-16-00019.

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Vanbelle, S., and A. Albert. "A note on the linearly weighted kappa coefficient for ordinal scales." Statistical Methodology 6, no. 2 (2009): 157–63. http://dx.doi.org/10.1016/j.stamet.2008.06.001.

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Petersen, Ina Sleimann, and Hygiene Henrik Wachmann. "Using the Kappa Coefficient as a Measure of Reliability or Reproducibility." Chest 114, no. 3 (1998): 946–47. http://dx.doi.org/10.1378/chest.114.3.946-a.

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Nofuentes, J. A. Roldán, J. D. Luna del Castillo, and M. A. Montero Alonso. "Confidence Intervals of Weighted Kappa Coefficient of a Binary Diagnostic Test." Communications in Statistics - Simulation and Computation 38, no. 8 (2009): 1562–78. http://dx.doi.org/10.1080/03610910903039473.

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Haley, Stephen M., and J. Scott Osberg. "Kappa Coefficient Calculation Using Multiple Ratings Per Subject: A Special Communication." Physical Therapy 69, no. 11 (1989): 970–74. http://dx.doi.org/10.1093/ptj/69.11.970.

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Guo, Ying, and Amita K. Manatunga. "Modeling the Agreement of Discrete Bivariate Survival Times using Kappa Coefficient." Lifetime Data Analysis 11, no. 3 (2005): 309–32. http://dx.doi.org/10.1007/s10985-005-2965-8.

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SHOUKRI, M. M., and I. U. H. MIAN. "MAXIMUM LIKELIHOOD ESTIMATION OF THE KAPPA COEFFICIENT FROM BIVARIATE LOGISTIC REGRESSION." Statistics in Medicine 15, no. 13 (1996): 1409–19. http://dx.doi.org/10.1002/(sici)1097-0258(19960715)15:13<1409::aid-sim269>3.0.co;2-n.

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Ipach, Ingmar, Eva-Maria Arlt, Falk Mittag, Beate Kunze, Petra Wolf, and Torsten Kluba. "A Classification-System Improves the Intra- and Interobserver Reliability of Radiographic Diagnosis of “Pistol-Grip-Deformity”." HIP International 21, no. 6 (2011): 732–39. http://dx.doi.org/10.5301/hip.2011.8821.

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Early detection of pistol-grip-deformity may be beneficial in optimising the outcome and the cost effectiveness of surgery. It is important to identify reliable radiographic parameters in assessing femoro-acetabular impingement (FAI) to develop a treatment algorithm. Radiographs of 47 patients ranging from “pistol grip deformity” to a normal head-neck-junction were measured for alpha angle and head ratio, and then classified by two different observers. The Bland-Altman plot was used for inter- and intraobserver agreement of alpha angle and head ratio. Inter- and intraobserver agreement for cla

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Fresneda, Mariano J., Juan J. Dere, Carlos H. Yacuzzi, and Matías Costa Paz. "ISAKOS Classification of Meniscal Tears. Intra and Interobserver Reliability." Orthopaedic Journal of Sports Medicine 2, no. 12_suppl4 (2014): 2325967114S0023. http://dx.doi.org/10.1177/2325967114s00239.

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Objectives: To analyze the intra and interobserverreliability of the International Society of Arthroscopy, Knee Surgery and Orthopaedic Sports Medicine (ISAKOS) classification of meniscal tears. Methods: Thearthroscopic classification of meniscal lesions created by the ISAKOS was used. Thirty one arthroscopic videos, made between June and December 2013,with different meniscal tear characteristics were analyzedby three orthopedic surgeons (two specialists in knee surgery and a fellowship), twice at an interval of 30 days. The Kappa Coefficients (k) was used to assess the intraobserver reliabili

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Mello, Paulo Roberto Bezerra de, Claudia de Souza Ozores Caldas, Sandra Coenga de Souza, and Ageo Mário Cândido da Silva. "The agreement between two screening tests for language evaluation in premature and low weight children." Revista Brasileira de Saúde Materno Infantil 16, no. 3 (2016): 295–302. http://dx.doi.org/10.1590/1806-93042016000300005.

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Abstract Objectives: to evaluate the agreement of the results in two screening tests on children's development - Denver II and Early Language Milestone Scale (ELM) aged two to three years old, born prematurely and with low weight. Methods: two screening instruments: Denver II and ELM were applied for the development in an observational cross-sectional descriptive study. The agreement between Denver II Test and its language sector and ELM were assessed by Kappa coefficient. Results: 77 children evaluated, 36.3% had an overall loss of the development performed by Denver II and 32.5% loss of the

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Wieland, Marc, and Sandro Martinis. "A Modular Processing Chain for Automated Flood Monitoring from Multi-Spectral Satellite Data." Remote Sensing 11, no. 19 (2019): 2330. http://dx.doi.org/10.3390/rs11192330.

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Emergency responders frequently request satellite-based crisis information for flood monitoring to target the often-limited resources and to prioritize response actions throughout a disaster situation. We present a generic processing chain that covers all modules required for operational flood monitoring from multi-spectral satellite data. This includes data search, ingestion and preparation, water segmentation and mapping of flooded areas. Segmentation of the water extent is done by a convolutional neural network that has been trained on a global dataset of Landsat TM, ETM+, OLI and Sentinel-

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Syauqy, Ahmad, Diana Nur Afifah, Rachma Purwanti, Choirun Nissa, Deny Yudi Fitranti, and Jane C. J. Chao. "Reproducibility and Validity of a Food Frequency Questionnaire (FFQ) Developed for Middle-Aged and Older Adults in Semarang, Indonesia." Nutrients 13, no. 11 (2021): 4163. http://dx.doi.org/10.3390/nu13114163.

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We assessed the reproducibility and validity of a food frequency questionnaire (FFQ) among middle-aged and older adults in Semarang, Indonesia. A total of 259 subjects aged 40–80 years completed two FFQs (nine-month apart) and nine 24 h dietary recalls (24HDRs, as a reference method). The reproducibility of the FFQ was analyzed using correlation coefficient, intra-class correlation coefficient (ICC), weighted kappa statistics and misclassification analysis. The validity was estimated by comparing the data acquired from FFQ1 and 24HDRs. The crude Pearson’s correlation coefficients and ICC for t

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Hosen, Md Ismail, Nathalie Forey, Geoffroy Durand, et al. "Development of Sensitive Droplet Digital PCR Assays for Detecting Urinary TERT Promoter Mutations as Non-Invasive Biomarkers for Detection of Urothelial Cancer." Cancers 12, no. 12 (2020): 3541. http://dx.doi.org/10.3390/cancers12123541.

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Somatic mutations in the telomerase reverse transcriptase (TERT) promoter regions are frequent events in urothelial cancer (UC) and their detection in urine (supernatant cell-free DNA or DNA from exfoliated cells) could serve as putative non-invasive biomarkers for UC detection and monitoring. However, detecting these tumor-borne mutations in urine requires highly sensitive methods, capable of measuring low-level mutations. In this study, we developed sensitive droplet digital PCR (ddPCR) assays for detecting TERT promoter mutations (C228T, C228A, CC242-243TT, and C250T). We tested the C228T a

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Hiraga, Kaoru, and Tamotsu Ikeda. "On the Kohnen plus space for Hilbert modular forms of half-integral weight I." Compositio Mathematica 149, no. 12 (2013): 1963–2010. http://dx.doi.org/10.1112/s0010437x13007276.

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AbstractIn this paper, we construct a generalization of the Kohnen plus space for Hilbert modular forms of half-integral weight. The Kohnen plus space can be characterized by the eigenspace of a certain Hecke operator. It can be also characterized by the behavior of the Fourier coefficients. For example, in the parallel weight case, a modular form of weight $\kappa + (1/ 2)$ with $\xi \mathrm{th} $ Fourier coefficient $c(\xi )$ belongs to the Kohnen plus space if and only if $c(\xi )= 0$ unless $\mathop{(- 1)}\nolimits ^{\kappa } \xi $ is congruent to a square modulo $4$. The Kohnen subspace i

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Kane-Gill, Sandra L., Levent Kirisci, and Dev S. Pathak. "Are the Naranjo Criteria Reliable and Valid for Determination of Adverse Drug Reactions in the Intensive Care Unit?" Annals of Pharmacotherapy 39, no. 11 (2005): 1823–27. http://dx.doi.org/10.1345/aph.1g177.

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BACKGROUND The Naranjo criteria are frequently used for determination of causality for suspected adverse drug reactions (ADRs); however, the psychometric properties have not been studied in the critically ill. OBJECTIVE To evaluate the reliability and validity of the Naranjo criteria for ADR determination in the intensive care unit (ICU). METHODS All patients admitted to a surgical ICU during a 3-month period were enrolled. Four raters independently reviewed 142 suspected ADRs using the Naranjo criteria (review 1). Raters evaluated the 142 suspected ADRs 3–4 weeks later, again using the Naranj

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CASTRO, CAÍQUE JAUHAR DE, LUIS EDUARDO CARELLI TEIXEIRA DA SILVA, LUIZ EDUARDO ALMEIDA, et al. "INTRA- AND INTEROBSERVER ANALYSIS OF PEDICLE SCREW PLACEMENT IN SCOLIOSIS CORRECTION." Coluna/Columna 19, no. 3 (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 0.6

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Wu, Yanan, Jing Liu, Baolin He, Xiaotong Zhang, and Lu Yu. "Adaptive Filtering Improved Apnea Detection Performance Using Tracheal Sounds in Noisy Environment: A Simulation Study." BioMed Research International 2020 (May 27, 2020): 1–8. http://dx.doi.org/10.1155/2020/7429345.

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Objective. Tracheal sounds were used to detect apnea on various occasions. However, ambient noises can contaminate tracheal sounds which result in poor performance of apnea detection. The objective of this paper was to apply the adaptive filtering (AF) algorithm to improve the quality of tracheal sounds and examine the accuracy of the apnea detection algorithm using tracheal sounds after AF. Method. Tracheal sounds were acquired using a primary microphone encased in a plastic bell, and the ambient noises were collected using a reference microphone resting outside the plastic bell in quiet and

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Sim, Julius, and Chris C. Wright. "The Kappa Statistic in Reliability Studies: Use, Interpretation, and Sample Size Requirements." Physical Therapy 85, no. 3 (2005): 257–68. http://dx.doi.org/10.1093/ptj/85.3.257.

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Abstract Purpose. This article examines and illustrates the use and interpretation of the kappa statistic in musculoskeletal research. Summary of Key Points. The reliability of clinicians' ratings is an important consideration in areas such as diagnosis and the interpretation of examination findings. Often, these ratings lie on a nominal or an ordinal scale. For such data, the kappa coefficient is an appropriate measure of reliability. Kappa is defined, in both weighted and unweighted forms, and its use is illustrated with examples from musculoskeletal research. Factors that can influence the

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Spyratos, Spyridon, Demetris Stathakis, Michael Lutz, and Chrisa Tsinaraki. "Using Foursquare place data for estimating building block use." Environment and Planning B: Urban Analytics and City Science 44, no. 4 (2016): 693–717. http://dx.doi.org/10.1177/0265813516637607.

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Information about the land use of built-up areas is required for the comprehensive planning and management of cities. However, due to the high cost of the land use surveys, land use data is out-dated or not available for many cities. Therefore, we propose the reuse of up-to-date and low-cost place data from social media applications for land use mapping purposes. As main case study, we used Foursquare place data for estimating nonresidential building block use in the city of Amsterdam. Based on the Foursquare place categories, we estimated the use of 9827 building blocks, and we compared the c

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Sharma, Abhishek, and Tarun Gulati. "Change Detection from Remotely Sensed Images Based on Stationary Wavelet Transform." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 6 (2017): 3395. http://dx.doi.org/10.11591/ijece.v7i6.pp3395-3401.

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The major issue of concern in change detection process is the accuracy of the algorithm to recover changed and unchanged pixels. The fusion rules presented in the existing methods could not integrate the features accurately which results in more number of false alarms and speckle noise in the output image. This paper proposes an algorithm which fuses two multi-temporal images through proposed set of fusion rules in stationary wavelet transform. In the first step, the source images obtained from log ratio and mean ratio operators are decomposed into three high frequency sub-bands and one low fr

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