منابع مشابه
Student Casualties
health, fail at their work or drop out of university. A university is a specialised community, with a particular pattern of selection, varying techniques for processing its material and with a 'wastage rate' that is of national concern. There are special stresses?social, academic and cultural?to which its population are subject. These can erode a vulnerable, developing personality, provoke a la...
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An independent broadcast on a connected graph $G$is a function $f:V(G)to mathbb{N}_0$such that, for every vertex $x$ of $G$, the value $f(x)$ is at most the eccentricity of $x$ in $G$,and $f(x)>0$ implies that $f(y)=0$ for every vertex $y$ of $G$ within distance at most $f(x)$ from $x$.The broadcast independence number $alpha_b(G)$ of $G$is the largest weight $sumlimits_{xin V(G)}f(x)$of an ind...
متن کاملCasualties of the sun.
A retrospective review was carried out of all sunburn related attendances, during the periods 1/6/94-31/8/94 and 1/6/95-31/8/95, at the four A&E departments and at one of the general practices within the Northern Health and Social Services Board area. Four hundred and thirty patients had attended. The modal age group was 16-30 years. More males presented than females. Within the sexes more male...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1910
ISSN: 0036-8733
DOI: 10.1038/scientificamerican06251910-519