منابع مشابه
The star formation histories of red and blue low surface brightness disk galaxies
Aims. We study the star formation histories (SFH) and stellar populations of 213 red and 226 blue nearly face-on low surface brightness disk galaxies (LSBGs), which are selected from the main galaxy sample of Sloan Digital Sky Survey (SDSS) Data Release Seven (DR7). We also compare the stellar populations and SFH between the two groups. Methods. The sample of both red and blue LSBGs have suffic...
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The predictions of the Bohmian and the decoherent (or consistent) histories formulations of the quantum mechanics of a closed system are compared for histories — sequences of alternatives at a series of times. For certain kinds of histories, Bohmian mechanics and decoherent histories may both be formulated in the same mathematical framework within which they can be compared. In that framework, ...
متن کاملConsistency of Quantum Histories
We prove that for an open system, in the Markovian regime, it is always possible to construct an infinite number of non trivial sets of histories that exactly satisfy the probability sum rules. In spite of being perfectly consistent, these sets manifest a very non–classical behavior: they are quite unstable under the addition of an extra instant to the list of times defining the history. To eli...
متن کاملOne cell, two cell, red cell, blue cell: The persistence of a unicellular stage in multicellular life histories.
As developmental biologists come closer to understanding at the molecular and genetic levels how a zygote becomes an adult, it is easy to forget that the very phenomenon that gives them an occupation remains a vexing problem to evolutionary biologists: why do unicellular stages persist in life histories of multicellular organisms? There are two explanatory hypotheses. One is that a unicellular ...
متن کاملQuerying Shapes of Histories
We present a shape de nition language, called SDL, for retrieving objects based on shapes contained in the histories associated with these objects. It is a small, yet powerful, language that allows a rich variety of queries about the shapes found in historical time sequences. An interesting feature of SDL is its ability to perform blurry matching. A \blurry" match is one where the user cares ab...
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ژورنال
عنوان ژورنال: Critique d’art
سال: 2001
ISSN: 1246-8258,2265-9404
DOI: 10.4000/critiquedart.2241