نتایج جستجو برای: the upward

تعداد نتایج: 16053502  

2007
Md. Abul Hassan Samee Md. Saidur Rahman

An upward planar drawing of a digraph G is a planar drawing of G where every edge is drawn as a simple curve monotone in the vertical direction. A digraph is upward planar if it has an embedding that admits an upward planar drawing. The problem of testing whether a digraph is upward planar is NP-complete. In this paper we give a linear-time algorithm to test the upward planarity of a series-par...

Journal: :J. Graph Algorithms Appl. 2011
Carla Binucci Emilio Di Giacomo Walter Didimo Aimal Rextin

Upward planar drawings of digraphs are crossing free drawings where all edges flow in the upward direction. The problem of deciding whether a digraph admits an upward planar drawing is called the upward planarity testing problem, and it has been widely studied in the literature. In this paper we investigate a new upward planarity testing problem, that is, deciding whether a digraph admits an up...

2001
A. Habig

A potential source of high energy neutrinos is the annihilation of Weakly Interacting Massive Particles (WIMPs) collecting in gravitational potential wells such as the centers of the Earth, the Sun, or the Galaxy. A search for such a WIMP annihilation signal using the Super-Kamiokande (SuperK) detector is presented. Super-K observes 1.1 upward throughgoing muons per day. These events are caused...

2001
Walter Didimo Maurizio Pizzonia

An upward embedding of an embedded planar graph states, for ea h vertex v, whi h edges are in ident to v \above" or \below" and, in turn, indu es an upward orientation of the edges. In this paper we hara terize the set of all upward embeddings and orientations of a plane graph by using a simple ow model. We take advantage of su h a ow model to ompute upward orientations with the minimum number ...

Journal: :iranian rehabilitation journal 0
hassan shakeri tehran university of medical sciences, tehran, iran. roshanak keshavarz university of social welfare and rehabilitation sciences, tehran, iran. amir masoud arab university of social welfare and rehabilitation sciences, tehran, iran. farhad tabatabai ghosheh university of kashan, kashan, iran. ailin talimkhani university of social welfare and rehabilitation sciences, tehran, iran.

objectives: the purpose of this study was to compare scapular kinematics during elevation phase of abduction, flexion, and scapular plane elevation phase between fifteen persons with shoulder impingement syndrome (sis) and thirteen persons without it. methods: values of scapular kinematics include scapular superior and lateral translations, upward rotation, external rotation, and posterior tipp...

2012
Markus Chimani Robert Zeranski

A directed acyclic graph is upward planar if it allows a drawing without edge crossings where all edges are drawn as curves with monotonously increasing y-coordinates. The problem to decide whether a graph is upward planar or not is NP-complete in general, and while special graph classes are polynomial time solvable, there is not much known about solving the problem for general graphs in practi...

Journal: :MHR: Basic science of reproductive medicine 2006

2011
Sean M. McCrea

Past research on counterfactual thinking has often found that upward counterfactual thoughts lead to increased motivation to improve in future, although at the cost of increased negative affect. The present studies suggest that because upward counterfactual thoughts indicate reasons for a poor performance, they can also serve as excuses. In this case, upward counterfactual thoughts should resul...

ژورنال: مواد پرانرژی 2019

The Ammonium Perchlorate (AP) is one of the useful oxidizer for making solid fuels, which is mainly produced by crystallization. In this study, the hydrodynamics of DTB crystallizer was simulated using Ansys Fluent in order to achieve a good understanding of flow pattern inside crystallizer which affects the CSD[1] of AP. The hydrodynamic characteristics of crystallizer were studied for differe...

خوش روش, مجتبی, میرناصری, محمد, پسرکلو, مهسا,

Climate scientists have concluded that the air temperature of earth’s surface warmed to 0.6 during the 20th century, and that warming induced by increasing concentrations of greenhouse gases accompanied by changes in the precipitation and hydrologic cycle. Monthly, seasonal and annual precipitation trends of meteorological stations have been analyzed and interpolated in the northern part of Ira...

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