منابع مشابه
Chasing Shadows in the Outer Solar System
The characteristics of the populations of objects that inhabit the outer solar system carry the fingerprint of the processes that governed the formation and evolution of the solar system. Occultation surveys push the limit of observation into the very small and distant outer solar system objects, allowing us to set constraints on the structure of the Kuiper belt, Scattered disk and Sedna popula...
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Introduction Iron lungs sucking breath into immobile bodies. Paralysis. Useless limbs. Forced separation of children from their families. Polio conjures up a nightmarish vision, in part due to the rapid and unexpected onset of paralysis, the inability to predict who might succumb, and the absence of any cure for the potentially lifelong poliovirus-associated paralysis. Sporadic cases of polio h...
متن کاملShadows.
We investigate the brightness distribution in and around outdoor shadows (for a variety of sky conditions) using modeling and field measurements. The dominant factor influencing the brightness of a shadow is the solid angle subtended by the object blocking the Sun. Occulters at the zenith that subtend a small solid angle cast shadows that are bright and possess a nearly uniform brightness acros...
متن کاملChasing Constrained
We investigate the implication problem for constrained tuple-generating dependencies (CTGDs), the extension of tuple-and equality-generating dependencies that permits expression of semantic relations (constraints) on variables. The implication problem is central to identifying redundant integrity constraints, checking integrity constraints on constraint databases, detecting the independence of ...
متن کاملChasing chaos
Both simple and hybrid genetic algorithms encounter difficulties when presented with a function which has multiple values. Similarly, changing environments or functions which change rapidly present other problems. This paper presents an algorithm that is capable of coping with both of these scenarios: it can accommodate multiple solutions simultaneously and can track changes in optima efficient...
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ژورنال
عنوان ژورنال: Molecular Metabolism
سال: 2020
ISSN: 2212-8778
DOI: 10.1016/j.molmet.2020.01.016