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. ...
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...
Approximation Algorithms for the Watchman Route and Zookeeper's Problems Given a simple polygon P with n vertices and a starting point s on its boundary, the watchman route problem asks for a shortest route in P through s such that each point in the interior of the polygon can be seen ...
With compelling evidenced based on research 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, ...
/ 5nImbEs; `nImbEs/ n (pl ~es / -bEsIz; -bEsIz/ or -bi / -baI; -baI/) 1 (in paintings, etc) bright circle shown round or over the head of a saint; halo (画等中的)(圣者头部四周或上方的)光环, 光轮. 2 rain cloud 雨云. ...
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. ...
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...
7 Multiple problems with warfarin have been identified, including bleeding, contraindications to its application, patient compliance, and the need for routine monitoring. Thus, it is estimated that anticoagulation is not currently used in up to 50% of eligible AF patients, which led to the ...