منابع مشابه
On optimal attraction in discrete-event processes
The concept of attraction has been shown to play a basic role in the synthesis of supervisors for stabilizing discrete-event processes. In this paper we define and investigate optimal attraction optimal in the sense that the cost (or distance) of the convergence path is as small as possible with respect to some distance measure. We find conditions for the existence of supervisors achieving opti...
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We investigate the consequences of fluid flowing on a continuous surface upon the geometric and statistical distribution of the flow. We find that the ability of a surface to collect water by its mere geometrical shape is proportional to the curvature of the contour line divided by the local slope. Consequently, rivers tend to lie in locations of high curvature and flat slopes. Gaussian surface...
متن کاملFatal attraction
L ook carefully at a solitary animal and you will find that it is not so alone after all. Animals play host to entire ecosystems that teem with diverse life. Some of the microbes that live on (or in) animals are beneficial to their host. However, these microbes' more sinister brethren, parasites and pathogens, cause damage and disease. Between these two extremes is a class of organisms that, it...
متن کاملFetal Attraction
Parents and health care practitioners alike cringe at the mere thought of exposing children to agents associated with cancer. For this reason, the medical world has traditionally shied away from administering prenatal X rays, long known to increase the risk of childhood leukemia. But little research has examined the effects of diagnostic X rays after birth, which are commonly prescribed by doct...
متن کاملMedical Tourism Attraction of Tehran Hospitals
Introduction: Today the market of medical tourism is growing as one of the competitive and profitable industries in the world. The aim of this study was to determine medical tourist attraction in Tehran hospitals. Methods: This is a descriptive study which was carried out in 8 hospitals of Tehran in 2012. 195 people from the managing boards of these hospi...
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ژورنال
عنوان ژورنال: Časopis pro pěstování matematiky a fysiky
سال: 1874
ISSN: 1802-114X
DOI: 10.21136/cpmf.1874.123241