This paper shows that when a classifier is evaluated with nonrandom test data, ROC curves differ from the ROC curves that would be obtained with a random sample. To address this bias, this paper introduces a procedure for plotting ROC curves that are inferred from nonrandom test data. I provide simulations and an example with wine data to illustrate the procedure as well as the magnitude of bia...

background: palladium-103 (103pd) is a brachytherapy source for cancer treatment. the monte carlo codes are usually applied for dose distribution and effect of shieldings. monte carlo calculation of dose distribution in water phantom due to a med3633 103pd source is presented in this work. materials and methods: the dose distribution around the 103pd model med3633 located in the center of 30×30...

A new concept, called synchronized Lissajous curve, is proposed to study synchro-waveform measurements that are obtained from waveform measurement units (WMUs) in power distribution systems. Two types of curves discussed. The first one created by plotting the difference two voltage waveforms versus current waveforms. second derivatives These carry valuable and complementary information about st...

Using inverse gas chromatography, the added to differential energy of adsorption due to lateral interactions of molecules adsorbed on a heterogeneous solid surface was determined. The method was applied to three gas/solid systems, namely, 1-butene/cadmium sulphide, ethane/calcium oxide, and trans-2-butene/marble. By plotting the dimensionless lateral interaction energy against time t in paralle...

One method of calculating the parameters of the Weibull distribution is by using probability plotting. To better illustrate this procedure, consider the following example from Kececioglu [18]. Example 1 Assume that six identical units are being reliability tested at the same application and operation stress levels. All of these units fail during the test after operating the following number of ...

It is difficult to describe host-microbe interactions in a manner that deals well with both pathogens and mutualists. Perhaps a way can be found using an ecological definition of tolerance, where tolerance is defined as the dose response curve of health versus parasite load. To plot tolerance, individual infections are summarized by reporting the maximum parasite load and the minimum health for...