Dropouts impact clinical trial outcome analyses. Ignoring missing data is not an acceptable option when planning, conducting or interpreting the analysis of a clinical trial. Treatment related efficacy and safety data observed in the trial may not always be sufficient in explaining the dropouts' mechanism. Nevertheless, these dropout data may carry important treatment-related information and pr...

Twenty seven male alcoholics were prospectively studied to find out the characteristics of those who drop out soon after discharge from the hospital. Seven persons, failed to make a single visit over a six-month period, and were termed 'dropouts'.On admission, after detoxification, all 27 patients were individually administered, the following tests:(1) Bhatia's Performance Test of Intelligence(...

In this paper, we investigate probabilistic stability of Kalman filtering over fading channels modeled by ∗-mixing random processes, where channel fading is allowed to generate nonstationary packet dropouts with temporal and/or spatial correlations. Upper/lower almost sure (a.s.) stabilities and absolutely upper/lower a.s. stabilities are defined for characterizing the sample-path behaviors of ...

The author shows how the copulas can be used to analyze repeated measurements with missing data. The main problem in practice is that there does not exist any theoretical joint distribution describing the repeated measurements, and then the copula function is a good tool to create the joint distribution. As the measurements are, in general, dependent, the conditional distribution of measurement...

Feedback control systems wherein the control loops are closed through a real-time network are called networked control systems (NCSs). The insertion of the communication network in the feedback control loop makes the analysis and design of an NCS complex. Driving our research effort into NCSs is the point of view that the design of both the communication protocols and the interacting controlled...

in this paper we study necessary and sufficient conditions for some types of linear combinations of wave packet frames to be a frame for l^2(r^d). further, we illustrate our results with some examples and applications.

Statistical models for calculating sample sizes for controlled clinical trials often fail to take into account the negative impact that dropouts have on the power of intent-to-treat analyses. Empirically defined dropout correction coefficients are proposed to adjust sample sizes for endpoint analysis of variance (ANOVA) and analysis of covariance (ANCOVA) that have been initially calculated ass...

In network steganography methods based on packet length, the length of the packets is used as a carrier for exchanging secret messages. Existing methods in this area are vulnerable against detections due to abnormal network traffic behaviors. The main goal of this paper is to propose a method which has great resistance to network traffic detections. In the first proposed method, the sender embe...