منابع مشابه
Towering tribute to botany
One of the world's greatest plant collections has won a top heritage award at a time when it is highlighting with a tree-top walkway the need to study the forest canopy which is one of the most crucial but least understood habitats.
متن کاملTowering Figures in American Mathematics, 1890-1950
The state of American mathematics in the year 1890 was quite bleak. Only two schools offered true graduate education, The Johns Hopkins University and Clark University. Both were new, Hopkins having been founded in 1876 and Clark in 1889. When compared to their counterparts in Europe, the courses taught at the vast majority of American universities were paltry, the spirit of research almost non...
متن کاملThe towering orogeny of New Guinea as a trigger for arthropod megadiversity.
Early studies on Melanesian mountain systems provided insights for fundamental evolutionary and ecological concepts. These island-like systems are thought to provide opportunities in the form of newly formed, competition-free niches. Here we show that a hyperdiverse radiation of freshwater arthropods originated in the emerging central New Guinea orogen, out of Australia, about 10 million years ...
متن کامل‘Achievement Systems’ to Boost ‘Achievement Motivation’
If games are to be used to reform educational practice then there needs to be a better understanding of how they motivate learners. Previous research on the classic intrinsic vs. extrinsic model of motivation is reviewed. Achievement Goal theory is suggested as a way to further unpack how games can affect motivations to learn, particularly in the use of badge or achievement systems. The Fosteri...
متن کاملA main achievement of gastrulation
Gastrulation is the morphogenetic process by which, in metazoans, the germ layers are established in their characteristic spatial arrangement: ectoderm on the outside, endoderm inside, and mesoderm, if present, in between these two layers. Most often, the main activity of gastrulation involves the movement of the endoderm and mesoderm from the surface of the embryo to the interior, and a variet...
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ژورنال
عنوان ژورنال: Chemical & Engineering News Archive
سال: 1985
ISSN: 0009-2347,2157-4936
DOI: 10.1021/cen-v063n041.p005