Luge Yang

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The receiver operating characteristic (ROC) curve is a popular technique with applications, for example, investigating an accuracy of a biomarker to delineate between disease and non-disease groups. A common measure of accuracy of a given diagnostic marker is the area under the ROC curve (AUC). In contrast with the AUC, the partial area under the ROC curve(More)
Small sample sizes are a common problem in biomedical research, and the periodontal literature is no exception. It is a problem leading to not only reduced statistical power but also an inappropriate statistical inference of a treatment effect. Using statistical methods with an insufficient sample size may give rise to an increased chance of falsely(More)
We present a new approach to monitoring public recreational beach waters and describe a prototype system that collects data from sensors and from people and combines those to create a novel metric of water resource quality and appreciation. We present an evaluation of the system and consider some consequences for IT-enabled smart environments that monitor(More)
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