منابع مشابه
Heaviest Induced Ancestors and Longest Common Substrings
Suppose we have two trees on the same set of leaves, in which nodes are weighted such that children are heavier than their parents. We say a node from the first tree and a node from the second tree are induced together if they have a common leaf descendant. In this paper we describe data structures that efficiently support the following heaviest-induced-ancestor query: given a node from the fir...
متن کاملWeighing the "heaviest" Polya urn
For the classical Polya urn model parametrized by exponent γ, the limit distributions of the fraction of balls in each bin are simple and well known when γ < 1 (“egalitarian”) and when γ > 1 (“winner takes all”). In this note, we partially fill in the gap for γ = 1, the critical point, by providing explicit analytical expressions for all the moments of the limit distribution of the fraction of ...
متن کاملHeaviest helium and lithium isotopes
Yu. Aksyutina1,2, T. Aumann1, K. Boretzky1, M.J.G. Borge3, A. Chatillon1, L.V. Chulkov1,4, D. Cortina-Gil5, U. Datta Pramanik6, H. Emling1, C. Forssén2, H.O.U. Fynbo7, H. Geissel1, G. Ickert1, H.T. Johansson2, B. Jonson2, R. Kulessa8, C. Langer1, M. Lantz2, T. Le Bleis1, A.O. Lindahl9, K. Mahata1, G. Münzenberg1, T. Nilsson2,10, G. Nyman2, S. Paschalis11, W. Prokopowicz1, R. Reifarth1, A. Richt...
متن کاملStability of the Heaviest Nuclei
Spontaneous–fission half–lives (T SF 1/2 ) of the heaviest even–even nuclei are evaluated and compared with their alpha–decay mode. Calculations of T SF 1/2 are performed in the dynamical way with potential energy obtained by the macroscopic–microscopic method and the inertia tensor obtained by the cranking approximation. The alpha– decay half–lives (Tα 1/2) are calculated for the same region o...
متن کاملVIEWPOINT Heaviest Element Has Unusual Shell
T he periodic table continues to evolve, as it has since the publication of the first widely recognized periodic table by Dmitri Mendeleev in 1869. There have been over 700 versions of the table of elements to date [1], with elements regularly being added, filling empty blocks of the table. An example is the late 19th century addition of a new column (group) of elements, the noble gases, by Wil...
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ژورنال
عنوان ژورنال: BMJ
سال: 1872
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.617.465