منابع مشابه
Should integrity constraints be global or local?
Data base integrity constraints are commonly expressed as predicates over data base states or state changes (global constraints) or as preconditions of transactions that are to change data base states (local constraints). We argue that business reengineering, and the lack of sophistication of users favor local constraints, but that global constraints may also be necessary. Local constraints are...
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Collaboration patterns of scholars have been the subject of many studies. This paper investigates the collaboration patterns of the Turkish scholars’ publications within the citation indexes. Turkey’s contribution to the world’s scientifi c literature has increased signifi cantly during the recent years. It is important to understand the collaboration types in scholarly communication in order t...
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Prolonged exposure to an oriented line shifts the perceived orientation of a subsequently observed line in the opposite direction, a phenomenon known as the tilt aftereffect (TAE). Here we consider whether the TAE for line stimuli is mediated by a mechanism that integrates the local parts of the line into a single global entity prior to the site of adaptation, or the result of the sum of local ...
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We assessed, in a task where subjects had to detect smooth deviations from circularity, whether the underlying mechanisms were localised in space to the size of the individual perturbations or whether they computed global shape. By manipulating the phase, the number of cycles of modulation and the spatial arrangement of the perturbations we argue that although either aspect can be detected, per...
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We attempt to fit observations with 5 resolution of the J=2−1 transition of CS in the directions of H ii regions A, B, and G of W49A North as well as observations with 20 resolution of the J=2−1, 3−2, 5−4, and 7−6 transitions in the directions of H ii regions A and G by using radiative transfer calculations. These calculations predict the intensity profiles resulting from several spherical clou...
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ژورنال
عنوان ژورنال: Nature
سال: 2000
ISSN: 0028-0836,1476-4687
DOI: 10.1038/35044160