منابع مشابه
Lamas in loops
Where new neurons come from he brain has come alive with the sightings of stem cells, but the molecular handles on those cells are few. On page 169, Belachew et al. identify and characterize a new population of neural stem cells (NSCs) that can generate neurons in the postnatal mouse brain. In previous work, the researchers identified cells that express CNP in transgenic mice using a CNP-GFP ma...
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Spectral differences between lensed quasar image components are common. Since lensing is intrinsically achromatic, these differences are typically explained as the effect of either microlensing, or as light path time delays sampling intrinsic quasar spectral variability. Here we advance a novel third hypothesis: some spectral differences are due to small line-of-sight differences through quasar...
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Natively unstructured or disordered protein regions may increase the functional complexity of an organism; they are particularly abundant in eukaryotes and often evade structure determination. Many computational methods predict unstructured regions by training on outliers in otherwise well-ordered structures. Here, we introduce an approach that uses a neural network in a very different and nove...
متن کاملUnrolling Loops in FORTRAN
SUhlMARY The technique of 'unrolling' to improve the performance of short program loops without resorting to assembly language coding is discussed. A comparison of the benefits of loop 'unrolling' on a variety of computers using an assortment of FORTRAN compilers is presented. INTRODUCTION It is frequently observed that the bulk of the central processor time for a program is localized in 3 per ...
متن کاملCombinatorial Structures in Loops
A Steiner triple system (STS) of order n, J,, = [S, 5a], is an arrangement of the elements of an n-set S into a set 5 ~ of triples such that every pair of elements in S occur together in exactly one triple of ~ A necessary and sufficient condition that an STS of order n exist is that n--1, 3 (mod 6). An STS J,, which has a group of automorphisms G which is regular (sharply transitive) on the el...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 2003
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb1611iti5