منابع مشابه
Quota quandaries
Years of EU fishing catch restrictions have failed to stem the decline of many once abundant species in the northeast Atlantic and fishermen and conservationists are pressing for change.
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Cloning mammals by nuclear transfer is a powerful technique that is quickly advancing the development of genetically defined animal models. However, the overall efficiency of nuclear transfer is still very low and several hurdles remain before the power of this technique will be fully harnessed. Among these hurdles include an incomplete understanding of biologic processes that control epigeneti...
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In his book on Liberalism against Populism, William Riker argued that Lincoln’s success in the 1860 election was the culmination of a long progression of strategic attempts by the Whig coalition of commercial interests to defeat the ‘Jeffersonian-Jacksonian’ Democratic coalition of agrarian populism. Riker adduced Lincoln’s success to his ‘heresthetic’ maneuver to force his competitor, Douglas,...
متن کاملQuantum Quandaries: A Category-Theoretic Perspective
General relativity may seem very different from quantum theory, but work on quantum gravity has revealed a deep analogy between the two. General relativity makes heavy use of the category nCob, whose objects are (n − 1)-dimensional manifolds representing ‘space’ and whose morphisms are n-dimensional cobordisms representing ‘spacetime’. Quantum theory makes heavy use of the category Hilb, whose ...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2008
ISSN: 0960-9822
DOI: 10.1016/j.cub.2007.12.007