منابع مشابه
Probabilistic Databases: Diamonds in the Dirt∗ (Extended Version)
A wide range of applications have recently emerged that need to manage large, imprecise data sets. The reasons for imprecision in data are as diverse as the applications themselves: in sensor and RFID data, imprecision is due to measurement errors [28, 66]; in information extraction, imprecision comes from the inherent ambiguity in natural-language text [32,40]; and in business intelligence, im...
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It seems kind of strange that eating parasitic worms causes a cure rather than a disease. Yet, this fact is no stranger than many other man-bites-dog stories about "real life" in contemporary times. Such stories arise at moments of changing equilibria in the processes of the social construction of reality. They are especially evident during periods of intense dialectic in which long held theses...
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Sign on the wall of El Santuario de Chimayo, New Mexico T his place feels old beyond human recollection. The carvings and paintings were surely done by human hands, but no one remembers whose hands those were. The work is striking, especially in the apse behind the altar. There, the colors of surrounding hills have been transferred onto nearly luminous wooden reredos full of Catholic symbolism....
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A class of diamond-shaped combinatorial structures is studied whose enumerating generating functions satisfy differential equations of the form f2 “ Gpfq, for some function G. In addition to their own interests and being natural extensions of increasing trees, the study of such DAG-structures was motivated by modelling executions of seriesparallel concurrent processes; they may also be used in ...
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In the fall of 2009 a group of biology students at Tufts University sat down together and ate some dirt. They ground up small clay tablets and swallowed the powder to find out, firsthand, what clay tastes like. This unusual taste test was part of a Darwinian medicine class taught by one of us (Starks). The students were studying the evolution of geophagia—the practice of eating dirt, especially...
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ژورنال
عنوان ژورنال: Nature
سال: 1991
ISSN: 0028-0836,1476-4687
DOI: 10.1038/353601a0