منابع مشابه
Treble dodging minor methods: ringing the cosets, on six bells
A general theory is developed to analyze Treble Dodging methods, for change ringing extents, on n=2 (mod4) bells, and then specialized to six bells, by means of Schreier right coset graphs of comparatively low order. The theory is then applied to the eight Treble Bob Minor methods, the six Delight Minor methods, and the fifteen Surprise Minor methods that appear in the book Diagrams. In each ca...
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OBJECTIVE To identify the awareness regarding noise pollution and its adverse effects on human health in the people of urban areas of Karachi. STUDY DESIGN Cross-sectional survey. PLACE AND DURATION OF STUDY Urban areas of Karachi, from September to October 2012. METHODOLOGY A survey was conducted with 50 selected subjects of urban areas of Karachi with their informed consent. The questio...
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Antibiotics are the 'wonder drugs' to combat microbes. For decades, multiple varieties of antibiotics have not only been used for therapeutic purposes but practiced prophylactically across other industries such as agriculture and animal husbandry. Uncertainty has arisen, as microbes have become resistant to common antibiotics while the host remains unaware that antibiotic resistance has emerged...
متن کاملBells, Motels and Permutation Groups
This article is about the mathematics of ringing the changes. We describe the mathematics which arises from a real-world activity, that of ringing the changes on bells. We present Rankin’s solution of one of the famous old problems in the subject.
متن کاملNew alarm bells
Some species do appear to practise construction skills — birds in particular — and to require some mental flexibility in starting the process. But ultimately, animals build the way they do because they are genetically programmed to do so, Hansell concludes. But evolution can lead to surprising results. Hansell notes that most of our closest primate relatives create little more than temporary sh...
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ژورنال
عنوان ژورنال: Journal of the Franklin Institute
سال: 1882
ISSN: 0016-0032
DOI: 10.1016/0016-0032(82)90337-4