منابع مشابه
Backwards Analysis
Consider the following scheme to solve the sorting problem: given n numbers to be sorted, after the ith of n (1 ≤ i ≤ n), we will make sure that we have i of input numbers in a sorted list. Clearly these i sorted numbers will partition the ranks of the remaining n− i unsorted numbers into i + 1 intervals. The (i + 1)th step consists of choosing one of the n − i unsorted numbers uniformly at ran...
متن کاملPulling backwards
extinguished by the transfer. But the extent of the transformation is not yet clear. “It’s possible that what we are doing is turning everything into an oocyte,” says Gurdon. But he believes that oct4 expression is a good sign that the cells are at least headed toward becoming stem cells. Stem cell characteristics may develop only through sequential inductive events. But the optimists are hopin...
متن کاملBackwards Phonology
This paper constitutes an investigation into the generative capabilities of two-level phonology with respect to unilevel generative phonological rules. Proponents of two-level phonology have claimed, but not demonstrated, that two-level rules and grammars of twolevel rules are reversible and that grammars ofnnilevel rules are not. This paper makes "reversibility" explicit and demonstrates by me...
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Seed germination, seedling emergence and crop establishment are important aspects of canola production, and are the main components of seed/seedling vigour. A major concern of seed businesses and canola growers alike is loss of seed vigour that may go undetected before planting. Two vigour assays, based on off-gassing of ethyl alcohol from poor vigour seed, are being developed. They are a simpl...
متن کاملBackwards Context Approximation
Context analysis calculates which components of arguments to functions may be evaluated eagerly without introducing non-termination. An amount of evaluation recommended by context analysis is less than the amount of evaluation which will occur at run-time. We may similarly derive contexts which are greater than the amount of run-time evaluation and hence determine which components of an express...
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ژورنال
عنوان ژورنال: Nature Reviews Genetics
سال: 2012
ISSN: 1471-0056,1471-0064
DOI: 10.1038/nrg3220