منابع مشابه
Biophysics of the second-generation cryoballoon: cryobiology of the big freeze.
C urrent guidelines recommend antral isolation of the pulmonary veins (PV) as the cornerstone of atrial fibrillation ablation. 1 Although conventional radiofrequency energy has traditionally been used with a point-by-point approach, cryo-ablation has emerged as a viable alternative to radiofrequency energy. The clinical success of cryoablation has been driven by the introduction of the cryoball...
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Male and female rats respond to a fearful experience in different ways, but this was not previously taken into account in research into psychiatric disorders.
متن کاملSTRUCTURAL OPTIMIZATION USING BIG BANG-BIG CRUNCH ALGORITHM: A REVIEW
The big bang-big crunch (BB-BC) algorithm is a popular metaheuristic optimization technique proposed based on one of the theories for the evolution of the universe. The algorithm utilizes a two-phase search mechanism: big-bang phase and big-crunch phase. In the big-bang phase the concept of energy dissipation is considered to produce disorder and randomness in the candidate population while in ...
متن کاملBig Plateaus of Big Data on the Big Island
In ancient texts, 40 was a magic number. It meant a “lot” or “a long time.” 40 years represented the time it took for a new generation to arise. A look back at 40 years of VLDB suggests that this applies to database researchers as well – the young researchers of the early VLDBs are now the old folks of the database world, and a new generation is creating afresh. Over this period many plateaus o...
متن کاملThe Online Freeze-Tag Problem
We consider the following problem from swarm robotics: given one or more “awake” robots in some metric space M , wake up a set of “asleep” robots. A robot awakens a sleeping robot by moving to the sleeping robot’s position. When a robot awakens, it is available to assist in awakening other slumbering robots. We investigate offline and online versions of this problem and give a 2-competitive str...
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ژورنال
عنوان ژورنال: Nature
سال: 2006
ISSN: 0028-0836,1476-4679
DOI: 10.1038/440608a