• Sometimes it is not feasible to obtain disease status verification for all study subjects. Analysis of only those with disease ascertainment can result in biased estimates of the accuracy (sensitivity, specificity, ROC curve) of a diagnostic test, screening test, or biomarker if the estimation method does not properly account for the missing disease ascertainment. This paper discusses the imp...

Background: Given that Hodgkin’s lymphoma (HL) accounts for 5%–6% of pediatric malignancies, we investigated the clinical characteristics and survival of pediatric patients with HL in our center. Materials and methods: In this cross sectional and retrospective study, the medical charts of all patients under the age of 18 diagnosed with HL from 2006 to 2016 at Shahid Sadoughi Hospital Yazd, Ira...

the behaviour of power transformers is very like to ideal ones. their characteristic matrices can not be determined directly, because the elements of the characteristic matrices are either close to infinity or zero. on the other hand, strong coupling between two transformer windings causes the determinant of these matrices to become zero. therefore, conversion of these matrices to each other wi...

The main focus of this paper is on efficiency analysis of two kinds of approximating functions (characteristic orthogonal polynomials and characteristic beam functions) that have been applied in the Rayleigh-Ritz method to determine the non-dimensional buckling and frequency parameters of an angle ply symmetric laminated composite plate with fully elastic boundaries. It has been observed that o...

ROC analysis investigates and employs the relationship between sensitivity and specificity of a binary classifier. Sensitivity or true positive rate measures the proportion of positives correctly classified; specificity or true negative rate measures the proportion of negatives correctly classified. Conventionally, the true positive rate tpr is plotted against the false positive rate fpr, which...

Table 6: The best orders of the S-boxes (p = 2 ?48). 6 Appendix This appendix describes 136 orders of DES S-boxes for which the maximal probability of two-round iterative characteristics is as in DES or smaller. Table 6 describes the orders whose best characteristics have probability 2 ?48 , which is lower than the best characteristic of DES. Table 7 describes the orders whose best characterist...