The general linear model (GLM) approach has arguably become the dominant way to analyze functional magnetic resonance imaging (fMRI) data. It tests whether activity in a brain region is systematically related to some known input function. However, the GLM becomes impractical when the precise timing and duration of psychological events cannot be specified a priori. In this work, we introduce a n...

Structural change is a major source of forecast failure. Immediately after a break, forecasting problems are particularly severe due to a lack of information about the new data generation process. Techniques exist for monitoring for structural change in real time, but the optimal post-break strategy is unexplored. We consider two approaches. First, monitoring for change and then combining forec...

Control charts are used to detect assignable causes in different manufacturing and nonmanufacturing processes. This study presents a new maximum exponentially weighted moving average (Max-EWMA) chart for joint unit interval time magnitude monitoring. To this end, beta distribution is considered whereas simplex magnitude. Average run length (ARL), standard deviation of (SDRL), quantiles evaluate...

Control charts are themost extensively used technique to detect the presence of special cause variations in processes. They can be classified intomemory andmemoryless control charts. Cumulative sum and exponentially weightedmoving average control charts are memory-type control charts as their control structures are developed in such a way that the past information is not ignored as it is done i...

In 2010, the EWMA Patient Outcome Group (POG) published recommendations to improve the quality of evidence in wound management. (1) As a companion piece of work, the EWMA POG has worked to provide a series of user-friendly documents to assist those new to (or inexperienced in) research, in starting on the path to plan, conduct, interpret and disseminate findings from an investigation that will ...

The performance of an X-bar chart is usually studied under the assumption that the process standard deviation is well estimated and does not change. This is, of course, not always the case in practice and X-bar charts are not robust against errors in estimating the process standard deviation or changing standard deviation. In this paper, the use of an exponentially weighted moving average (EWMA...

Diagnostic laboratories are increasingly required to meet stringent quality standards, and validated assays are needed to achieve formal accreditation. Validation of test methods is often considered to be finalised when the assay parameters and characteristics have been established. However, like any process, diagnostic assays are subject to random variation resulting in shifts in the mean test...

The environments of WSN frequently disturb the link quality. Link quality not only affects the reliability of data transmission in the network, but also determines the performance of related Upper-layer network protocol. Therefore, link quality evaluation becomes a considering question. The link quality evaluation methods include data package delivery rate and LQI(Link Quality Index). Practical...

Intrusion detection systems typically create large amounts of alerts, processing of which is a time consuming task for the user. This paper describes an application of exponentially weighted moving average (EWMA) control charts used to help the operator in alert processing. Depending on his objectives, some alerts are individually insignificant, but when aggregated they can provide important in...