منابع مشابه
To count and how to count, that is the question.
Optimal cancer staging requires retrieval of a minimal number of nodes. However, variability among pathologists in counting on a slide has not been studied. To study the differences in node counting among pathologists, 10 pathologists counted nodes on 15 slides on 2 occasions. They also opined on whether selected "structures" represented countable nodes. There was no slide on which all patholog...
متن کاملMultitree automata that count
Multitree are unranked, unordered trees and occur in many Computer Science applications like rewriting and logic, knowledge representation, XML queries, typing for concurrent systems, cryptographic protocols.... We define constrained multitree automata which accept sets of multitrees where the constraints are expressed in a first-order theory of multisets with counting formulas which is very ex...
متن کاملIt's the little things that count.
Join us as we learn and play with the little things that count! In this full day workshop, we will be working with Joe’s gadgets and cover exercises on the original pedi-pole. We will work the magic circle, toe corrector, 2x4, foot corrector, breath-aciser, sand bag, magic circle, neck stretcher, and the baby arm chair. How can they be used to gain the greatest benefit? How do they fit with the...
متن کاملSynthetic gene networks that count.
Synthetic gene networks can be constructed to emulate digital circuits and devices, giving one the ability to program and design cells with some of the principles of modern computing, such as counting. A cellular counter would enable complex synthetic programming and a variety of biotechnology applications. Here, we report two complementary synthetic genetic counters in Escherichia coli that ca...
متن کاملGene Silencing Repeats that Count
RIP is nucleus limited. We know this because the specialized cells that carry out RIP are heterokaryotic, with nuclei from both parents. When a sequence is duplicated in one nucleus but not the other, the lone copy is never silenced. The mechanism of RIP is unknown but probably involves DNA:DNA pairing (Figure 1) followed by methyla-Repeated DNA and cytosine methylation are common tion and deam...
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ژورنال
عنوان ژورنال: Nature
سال: 1986
ISSN: 0028-0836,1476-4687
DOI: 10.1038/322199a0