منابع مشابه
Growing a Tree from Its Branches
Given a set of n disjoint line segments in the plane, we show that it is always possible to form a spanning tree of the endpoints of the segments, such that each line segment is an edge of the tree and the tree has no crossing edges. We also show that the maximum degree of a node in the minimum weight spanning tree formed by these line segments is seven, and that there exists a set of line segm...
متن کاملLost Branches on the Tree of Life
1 University of Florida, Gainesville, Florida, United States of America, 2 Clark University, Worcester, Massachusetts, United States of America, 3 Brigham Young University, Provo, Utah, United States of America, 4 George Washington University, Washington, DC, United States of America, 5 Smith College, Northampton, Massachusetts, United States of America, 6 Florida Museum of Natural History, Gai...
متن کاملConcurrent Sweet’s syndrome and erythema nodosum: two manifestations of the same disease or the same spectrum?
Sweet’s syndrome and erythema nodosum are rarely seen together. Herein, we report a case of concurrent Sweet’s syndrome and erythema nodosum and review previous cases.
متن کاملMolecular evolution: Old branches on the phytochrome family tree
Phytochromes are a divergent family of plant photoreceptors that mediate a wide range of developmental and physiological responses to changes in light intensity and spectral quality. In the flowering plants, phytochromes regulate seed germination, circadian rhythms, leaf and stem development, and the timing of floral initiation [1]. Each phytochrome molecule exists as one of two distinct photor...
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ژورنال
عنوان ژورنال: Physical Therapy
سال: 2018
ISSN: 0031-9023,1538-6724
DOI: 10.1093/ptj/pzy085