This article is about testing the equality of several normal means when the variances are unknown and arbitrary, i.e., the set up of the one-way ANOVA. Even though several tests are available in the literature, none of them perform well in terms of type I error probability under various sample size and parameter combinations. In fact, the type I errors can be highly inflated for some of the com...

The predominant learning strategy for H(S)MMs is local search heuristics, of which the Baum-Welch/ expectation maximization (EM) algorithm is mostly used. It is an iterative learning procedure starting with a predefined topology and randomly-chosen initial parameters. However, state-of-the-art approaches based on arbitrarily defined state numbers and parameters can cause the risk of falling int...

Equiangular tight frames (ETFs) have found significant applications in signal processing and coding theory due to their robustness to noise and transmission losses. ETFs are characterized by the fact that the coherence between any two distinct vectors is equal to the Welch bound. This guarantees that the maximum coherence between pairs of vectors is minimized. Despite their usefulness and wides...

In this study, 40 healthy control group and 40 patients with rheumatoid arthritis (RA) and Doppler signal from radial artery of the left and right hand were recorded. This non-parametric Welch Periodogram method to signal attributes of the signs were removed and the artificial neural network (ANN) classification method was utilized in order to recognize diseased and healthy control group indivi...

The two one-sided tests (TOST) procedure is the common method for assessing bioequivalence between different drugs or formulations of same drug. Several solutions to Behrens-Fisher problem have been extended establish statistical equivalence under variance heterogeneity. Unlike other existing studies that rely exclusively on simulation results, analytical formulas power and Type I error rate ar...

More than 50 years ago, Golomb and Welch conjectured that there is no perfect Lee codes C of packing radius xmlns:xlink="http://www.w3.org/1999/xlink">r in Zn for ≥ 2 xmlns:xlink="http://www.w3.org/1999/xlink">n 3. Recently, Leung the second author proved if linear, then Golomb-Welch co...

Government agencies provide regular reports on progress in the fight against cancer, and these reports are viewed with great interest by researchers and by the media (1). The primary measures of the cancer burden are cancer incidence rates and cancer mortality rates. The latter are derived from state death certificates, which are completed by physicians, medical examiners, coroners, and funeral...

Traditional library instruction programs teach scientists how to find and manage information, but not how to report their research findings effectively. Since 1990, the William H. Welch Medical Library has sponsored classes on scientific writing and, since 1991, has offered a fee-based editing service for affiliates of the Johns Hopkins Medical Institutions. These programs were designed to fill...