A watchman, in the terminology of art galleries, is a mobile guard. We consider several watchman and guard problems for different classes of polygons. We i... S Carlsson,BJ Nilsson,S Ntafos - Springer Berlin Heidelberg 被引量: 97发表: 1991年 On the rectilinear art gallery problem algorithm...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook an instrument having at the end of a handle a revolving arm, which, by the action of a strong spring upon cogs, produces, when in motion, a loud, harsh, rattling sound. ...
While licensed to practice medicine in Florida, Zelenko now spends most of his time educating the public and other doctors. He’s also available via telemedicine, but his passion has become researching and developing simple, natural approaches to complex health problems — including his own. ...
in the rise and fall of Mayan, Khmer, and Roman empires, Costa shows how t ht tendency to find a quick solutions- leads to frightening long term consequence:Society’s ability to solve its most challenging, intractable problems becomes gridlocked, progress slows, and collapse ensues. A ...
Animism:The idea that all things in the universe are inherently invested with a life force, soul, or mind. This belief is an important component of many primitive religions, theoccult, andspiritism. Annihilationism:Taught by mostAdventistgroups, including theWatchtower Bible and Tract Society, this...
and thromboembolic events is poorly understood, said Krishan, but there is evidence showing that incomplete closure with the Lariat device (SentreHEART) or surgical exclusion is associated with an increased risk of subsequent stroke—raising concerns that the Watchman might suffer the same problems. ...