منابع مشابه
Galaxy Evolution : Internally or Externally Driven ?
1 RESUMEN El resumen será traducido al español por los editores. The globally-averaged star formation rate in the Universe has been steadily declining since at least z ∼ 1. This may be due either to very local processes operating within the average galaxy, or to external, environmental effects. Specifically, the build-up of structure may be responsible for terminating star formation in some gal...
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The purpose of this work is to take an arbitrary 2phase synchronous circuit and eliminate its global clock while preserving its externally visible behavior. This is done by converting it into a set of self-timed combinational circuits with latches and a clock generation network that uses only a local handshake. We discuss the overhead required by this approach to selftiming and outline opportun...
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The notions of externally positive and internally positive time-varying linear systems are introduced. Necessary and sufficient conditions for the external positivity and internal positivity of time-varying linear systems are established. Sufficient conditions for the reachability of internally positive time-varying linear systems are presented.
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Thirty persons arrested at Frankfurt airport for smuggling internally concealed cocaine in 1993/1994 were investigated. An X-ray examination (in all 30 cases), immunochemical examination of urine (in 27 cases) and of saliva (in 20 cases) was performed in parallel. An X-ray examination gave positive results in all examined persons. EMIT cocaine metabolite assay (cut off 300 ng benzoylecgonine (B...
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They all describe events of an apple’s being on the tray and Tom’s eating it. But, there exist several intriguing differences between the two constructions. One crucial difference between the IHRC and EHRC comes from the fact that the semantic object of mekessta ‘ate’ in IHRC examples like (1)a is the NP sakwa ‘apple’ buried inside the embedded clause followed by kes. It is thus the subject of ...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1887
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)10546-0