منابع مشابه
A. Von Humboldt Fellow.
We derive the kinematical constraints which characterize the decay of any massless particle in flat spacetime. We show that in perturbation theory the decay probabilities of photons and Yang-Mills bosons vanish to all orders; the decay probability of the graviton vanishes to one-loop order for graviton loops and to all orders for matter loops. A general power counting argument indicates in whic...
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produce. I am, of course, talking about 'the correlation of parts', 'developmental constraints', 'mutational bias', the 'integration of development with evolution', 'the real reason pigs can't fly' — every generation since Darwin has considered, and failed to solve, the problem, though they've usually given it a new name. The second question is rather like the first: can we predict the course o...
متن کاملAndrea Musacchio
refinements of this equipment. There was a direct analogy with the voltage clamp approach in nerve, but now length or force became the controlled parameter in place of voltage. This approach was applied in a quantitative study of the relation between the steady force produced by an active muscle fiber and its length: Huxley showed that force is proportional to overlap between the thick and thin...
متن کاملHumboldt hopes
dramatically since 2006, especially in the wake of the UN secretary-general's call for universal malaria control coverage by the end of 2010. " The report reveals that new methods of estimating malaria incidence found 247 million cases of the disease in 2006. However, malaria deaths have declined in several countries and, in a few African nations, deaths have been reduced by half by the impleme...
متن کاملAndrea Pimentel
SIR, We previously reported an autoinflammatory disease associated with nucleotide-binding oligomerization domain containing protein 2 (NOD2) gene mutations, designated as NOD2-associated autoinflammatory disease (NAID) [1, 2]. To date, none of the studies of NOD2 mutations have demonstrated spontaneous inflammation in NOD2-associated diseases [3]. Herein we report a patient with NAID to illust...
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ژورنال
عنوان ژورنال: Finisterra
سال: 2017
ISSN: 2281-4574,0430-5027
DOI: 10.18055/finis10861