The literature of active magnetic bearing (AMB) technology dates back to at least 1937 when the earliest work that clearly describes an active magnetic bearing system was published by Jesse Beams [1]. Progress on the technology was modest until the late 1970s, when commercial development began to emerge as, for instance, described by Haberman and Liard in 1977 [2]. The state of the art in 1988 ...

This paper proposes a method that dynamically improves a statistical model of system degradation by incorporating uncertainty. The method is illustrated by a case example of fouling, or degradation, in a heat exchanger in a cogeneration desalination plant. The goal of the proposed method is to select the best model from several representative condenser fouling models including linear, falling r...

In this paper the geometric process is used for the analysis of accelerated life testing for MarshallOlkin Extended Exponential (MOEE) distribution using Type II censored data. Assuming that the lifetimes under increasing stress levels form a geometric process, The parameters are estimated by using the maximum likelihood method and the original parameters instead of the developing inference for...

feeding rhythm during the Arctic polar day and night [14], and the emperor penguin (Aptenodytes forsteri) loses its melatonin rhythm during the Antarctic mid-winter [15]; on the other hand, several Arctic rodents and carnivores have been reported to exhibit 24-h activity rhythms during the polar day and/or in constant conditions [16–19]. Clearly, further comparative studies are needed to determ...

Shortened telomere length may cause chromosomal instability in Barrett's esophagus and thus promote tumorigenesis. However, whether short telomere length in all chromosomes or just some of them is associated with increased esophageal cancer (EC) risk is largely unknown. To address this question, we examined the overall and chromosome-specific telomere lengths of 17p, 12q, 2p, and 11q and assess...

Recent advances in data acquisition technologies have led to massive amount of data being collected routinely in the physical, chemical, and engineering sciences as well as information sciences and technology. In addition to volume, the data often have complicated structure. Examples of such Big Data include the data streams obtained from complex engineering systems, image sequences, climate da...

Three copolymers of N-vinylcarbazole and N-phenyl-2-(5’-vinyl-2’-thienyl)-5-(2”-thienyl)pyrrole were synthesized using different feed stock ratios identical to the mass blends and characterized. Blends of poly(N-vinylcarbazole) (PVK) and poly(N-phenyl-2-(2’-thienyl)-5(5’’-vinyl-2’’-thienyl)pyrrole) (PSNPhS) with similar compositions were prepared. Solidstate devices were fabricated, and the ele...

The root mean square error of approximation (RMSEA) is one of the most widely reported measures of misfit/fit in applications of structural equation modeling. When the RMSEA is of interest, so too should the accompanying confidence interval. A narrow confidence interval reveals that the plausible parameter values are confined to a relatively small range, at the specified level of confidence. Th...

Men and women are believed to differ in how influential and easily influenced they are: Men are thought to be more influential, and women more easily influenced. In natural settings, men and women tend to differ in these ways, but these differences stem largely from formal status inequalities by which men are more likely than women to have high-status roles. Status is important because of the l...

The purpose of this American Society for Reproductive Medicine Practice Committee report is to provide clinicians with principles and strategies the evaluation treatment couples infertility associated obesity. This revised document replaces titled “Obesity reproduction: an educational bulletin” last published in 2015 (Fertil Steril 2015;104:1116–26). Obesidad y Reproducción: una opinión de comi...