منابع مشابه
Eels meet again
One of the most mysterious fish of the western Atlantic is the European eel. Its range is vast: adults spend the bulk of their life in freshwater systems from Iceland to Morocco. And, indeed, the species has supported one of the biggest fisheries in Europe, employing up to 25,000 people at its height. But, as with many other commercial species, stocks are now in dangerous decline. The number of...
متن کاملInvasive Species: Old Foes Meet Again
Tawny crazy ants are spreading across the southern U.S., replacing one of the most notorious invasive pests, the red imported fire ant. A crucial factor in this process is that tawny crazy ants are able to efficiently detoxify fire ant venom.
متن کاملWhy do experts on ectodermal dysplasia (ED) meet again?
Hypohidrotic ectodermal dysplasia was first described in the mid 19 century by John Thurnam. In 1875, Charles Darwin described the signs and symptoms in a fourgeneration family, “the ten men from Scinde”, explaining X-linked inheritance at the same time when Gregor Mendel mapped the laws of inheritance. The typical clinical expression in boys with X-linked hypohidrotic ED makes this syndrome ea...
متن کاملHamilton and Jacobi Meet Again: Quaternions and the Eigenvalue Problem
The algebra isomorphism between M 4 (R) and HHH, where H is the algebra of quaternions, has unexpected computational payoo: it helps construct an orthogonal similarity that 22 block-diagonalizesa 44 symmetricmatrix. Replacing plane rotations with these more powerful 4 4 rotations leads to a quaternion-Jacobi method in which thèweight' of 4 elements (in a 2 2 block) is transferred all at once on...
متن کاملEndogenous income taxes and indeterminacy in dynamic models: When does Diamond meet Ramsey again?
This paper introduces scal increasing returns, through endogenous labor income tax rates as in Schmitt-Grohe and Uribe (1997), into the overlapping generations model with endogenous labor, consumption in both periods of life and homothetic preferences (e.g., Lloyd-Braga, Nourry and Venditti, 2007). We show that under numerical calibrations of the parameters, local indeterminacy can occur for d...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2005
ISSN: 0960-9822
DOI: 10.1016/j.cub.2005.06.009