منابع مشابه
Sunflowers in Lattices
A Sunflower is a subset S of a lattice, with the property that the meet of any two elements in S coincides with the meet of all of S. The Sunflower Lemma of Erdös and Rado [2] asserts that a set of size at least 1 + k!(t − 1)k of elements of rank k in a Boolean Lattice contains a sunflower of size t. We develop counterparts of the Sunflower Lemma for distributive lattices, graphic matroids, and...
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To the Editor: Banegas et al,1 for the Spanish Society of Hypertension Ambulatory Blood Pressure Monitoring Registry Investigators, have examined the sensitivity and specificity of office blood pressure measurements in assessing control of hypertension in treated patients. The “gold standard” reference was the daytime component of a 24-hour ambulatory blood pressure monitoring. In this manner, ...
متن کامل[The SIESTA study].
Although not mentioned in the recently published manuscript2, the SIESTA study contemplates to carry out an extensive and exhaustive analysis of risk in both obese patients and in those with metabolic syndrome. Body mass index is, indeed, one of the variables that will be analysed in this regard, as included in our original protocol. Furthermore, a substudy of SIESTA will be aimed specifically ...
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We report the results of a scaling effort that increases both the speed and resolution of the SIESTA magnetohydrodynamic equilibrium code. SIESTA is capable of computing three-dimensional plasma equilibria with magnetic islands at high spatial resolutions for toroidally confined plasmas. Starting with a small-scale parallel implementation, we identified scale-dependent bottlenecks of the code a...
متن کاملWilliam Pickles lecture 1989. Seeing sunflowers.
THE clearest memory I have from my first year as a medical student is of a botany practical. We had the task, one sunny Thursday afternoon, of cutting a very thin slice of a sunflower stem, putting it under the microscope and drawing what we saw. In the textbook there was an illustration of what we should expect to see: as I remember, it showed regular, neatly-'packed cells with several smaller...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/270556c0