We consider a cache-aided communications system in which a transmitter communicates with many receivers over an erasure broadcast channel. The system serves as a basic model for communicating on-demand content during periods of high network congestion, where some content can be preplaced in local caches near the receivers. We formulate the cacheaided communications problem as a joint cache-chan...

Vorapongsathorn, T., Taejaroenkul, S. and Viwatwongkasem, C. A comparison of type I error and power of Bartlett’s test, Levene’s test and Cochran’s test under violation of assumptions Songklanakarin J. Sci. Technol., 2004, 26(4) : 537-547 This study compared the probability of Type I error and the power of three statistical tests (Bartlett, Levene and Cochran) by varying the sampling distributi...

BACKGROUND The DerSimonian and Laird approach (DL) is widely used for random effects meta-analysis, but this often results in inappropriate type I error rates. The method described by Hartung, Knapp, Sidik and Jonkman (HKSJ) is known to perform better when trials of similar size are combined. However evidence in realistic situations, where one trial might be much larger than the other trials, i...

BACKGROUND Health surveys of the general US population are inadequate for monitoring human immunodeficiency virus (HIV) infection because the relatively low prevalence of the disease (<0.5%) leads to small subpopulation sample sizes. OBJECTIVE To collect a nationally and locally representative probability sample of HIV-infected adults receiving medical care to monitor clinical and behavioral ...

-In this paper, we use the unequal radius modified Gouy-Chapman theory to evaluate the effect of the ionic size of the electrolyte on the swelling pressures (H) in different clay systems immersed in electrolytic solutions. First the model is applied to a l:l electrolyte to show that the coion size is only important at surface charge densities much lower than those found in typical clay systems....

Scott and Smith (1969) develop estimators for linear functions from a two stage cluster sample, with their discussion repeated in many places. This discussion was reviewed in c01ed13.doc. It is note-worthy that Scott and Smith allow expressions for the variance to depend on the cluster. A similar development is given by Vallient et al.. We repeated the derivation of Vallient et al using the fin...