BACKGROUND AND PURPOSE The prevalence of atrial fibrillation increases with age, but age-specific data on the incidence of stroke and death in anticoagulated patients with atrial fibrillation are more limited, particularly with regard to comparisons of relative risks of clinical outcomes between the different age strata in relation to quality of anticoagulation control among warfarin users. M...

This research intended to develop a traditional game guidebook improve self-control for children aged 9-12. method was R&D. Research conducted involved seven validators expert judgment, teachers who were certified educators needs analysis, and six through subjects of limited trial the developed guidebook. The results indicated that; 1) development this using ADDIE, 2) belonging "Very good" ...

In this paper we construct quantum analogs of strata of coadjoint orbits and describe their representations. This kind objects play an important role in describing quantum groups as repeated extensions of quantum strata.

Strata and surface movement induced by mining under open-pit final slope is a huge 8 threat to mine safety. Physical model test is an important method to study mining-induced strata 9 and surface movement laws. Because of rock joints predominantly control rock mass deformation 10 and failure, thus physical model test leaving out of consideration of rock joints is difficult to reflect 11 the inf...

Under the guidance of green mining and scientific ideas, strata movement its control have achieved a series research developments in China. Based on summary achievements related to characteristics, influences activity surface environment, utilizing controlling methods, critical problems that need be solved are identified for study control. Mining activities will cause redistribution stress. The...

A brief overview of a cooperative NASA/Boeing research effort, Strake Technology Research Application to Transport Aircraft (STRATA), intended to explore the potential of applying forebody strake technology to transport aircraft configurations for directional stability and control at low angles of attack, is presented. As an initial step in the STRATA program, an exploratory wind-tunnel investi...

This paper provides a method of strata boundary determination that generalizes the method of Dalenius and Hodges. The method holds for general populations. It makes no restrictive assumptions about the population distribution or about the ignorability of the finite population correction. 1. INTRODUCTION This paper describes a strategy for strata boundary determination that generalizes the class...

Stratified Cox regression models with large number of strata and small stratum size are useful in many settings, including matched case-control family studies. In the presence of measurement error in covariates and a large number of strata, we show that extensions of existing methods fail either to reduce the bias or to correct the bias under nonsymmetric distributions of the true covariate or ...