منابع مشابه
Giant edge state splitting at atomically precise graphene zigzag edges
Zigzag edges of graphene nanostructures host localized electronic states that are predicted to be spin-polarized. However, these edge states are highly susceptible to edge roughness and interaction with a supporting substrate, complicating the study of their intrinsic electronic and magnetic structure. Here, we focus on atomically precise graphene nanoribbons whose two short zigzag edges host e...
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قاعده مقتضی و مانع در متون فقهی کم و بیش مستند احکام قرار گرفته و مورد مناقشه فقهاء و اصولیین می باشد و مشهور معتقند مقتضی و مانع، قاعده نیست بلکه یکی از مسائل ذیل استصحاب است لذا نگارنده بر آن شد تا پیرامون این قاعده پژوهش جامعی انجام دهد. به عقیده ما مقتضی دارای حیثیت مستقلی است و هر گاه می گوییم مقتضی احراز شد یعنی با ماهیت مستقل خودش محرز گشته و قطعا اقتضاء خود را خواهد داشت مانند نکاح که ...
15 صفحه اولSplitting Off Edges within a Specified Subset Preserving the Edge-Connectivity of the Graph
Splitting off a pair su; sv of edges in a graph G means the operation that deletes su and sv and adds a new edge uv. Given a graph G = (V + s;E) which is k-edge-connected (k 2) between vertices of V and a specified subset R V , first we consider the problem of finding a longest possible sequence of disjoint pairs (splittings) of edges sx; sy, x; y 2 R which can be split off preserving k-edge-co...
متن کاملSplitting off edges between two subsets preserving the edge-connectivity of the graph
Splitting off a pair of edges su; sv in a graph G means replacing these two edges by a new edge uv. This operation is well-known in graph theory. Let G = (V + s; E + F ) be a graph which is k-edge-connected in V and suppose that jF j is even. Here F denotes the set of edges incident with s. Lovász [12] proved that if k 2 then the edges in F can be split off in pairs preserving the k-edge-connec...
متن کاملon the effects of pictorial clues on the efl learners listening comprehension development
the following null hypothesis was proposed: there is no significant difference between the efl students listening comprehension development receiving pictorial cues and those receiving no cuse. to test the null hypothesis, 52 male and femal freshmen students of medicine studing at iran university of medical scinces were randomly selected from a total population of 72 students. to ensure that th...
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ژورنال
عنوان ژورنال: Science
سال: 2010
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.327.5973.1555-c