منابع مشابه
Combinatorial Gems
Although this lecture does not contain many offical Olympiad problems, the arguments which are used are all common elements of Olympiad problem solving. Some of these perhaps could have made nice Olympiad problems, if not for the fact that they were already well-known due to their importance in higher mathematics. Most of this is sourced from the excellent combinatorics course developed by Benn...
متن کاملOne-Step Ball Milling Preparation of Nanoscale CL-20/Graphene Oxide for Significantly Reduced Particle Size and Sensitivity
A one-step method which involves exfoliating graphite materials (GIMs) off into graphene materials (GEMs) in aqueous suspension of CL-20 and forming CL-20/graphene materials (CL-20/GEMs) composites by using ball milling is presented. The conversion of mixtures to composite form was monitored by scanning electron microscopy (SEM) and powder X-ray diffraction (XRD). The impact sensitivities of CL...
متن کاملHidden gems
fatalities in the 1970s and 80s were due to fishing equipment. It is not that these threats went unrecognised. Aside from a brief spell during Mao’s Great Leap Forward — when Nature was declared an ‘enemy of the people’ and the Baiji was actively prosecuted — the urgent need for its conservation was gradually realised inside and outside of China. But, while some attempts were made to establish ...
متن کاملCs-621 Theory Gems
So far, we were focusing on “static” analysis of games. That is, we considered scenarios in which the game and utilities of all the players are fixed and known and our task is only to predict possible outcomes of that game when some (or all) the players are acting rationally. Today, we turn the tables: there is no predefined game, only players that have some utilities. However, the key point is...
متن کاملGems and Their Medicinal Values
The medicinal uses of nine major gems (Navrtna) are enumerated here.
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ژورنال
عنوان ژورنال: Nature
سال: 1932
ISSN: 0028-0836,1476-4687
DOI: 10.1038/130419c0