The orientation completion problem for a fixed class of oriented graphs asks whether given partially graph can be completed to an in the class. Orientation problems have been studied recently several classes graphs, including local tournaments. Local tournaments are intimately related proper circular-arc and interval graphs. In particular, precisely those which as acyclic this paper we determin...

The cracking elements method (CEM) is a novel numerical approach for simulating fracture of quasi-brittle materials. This method is built in the framework of conventional finite element method (FEM) based on standard Galerkin approximation, which models the cracks with disconnected cracking segments. The orientation of propagating cracks is determined by local criteria and no explicit or implic...

the occupy wall street movement has presented a series of challenges to local law enforcement agencies. in response, many of them have relied on a variety of aggressive tactics, which in some cases have shocked public opinion, putting the issue of protest policing on the national agenda. three main narratives have emerged to explain these tactics: 1) there has been a broad “militarization” of t...

The cell membrane is an ordered environment, which anisotropically affects the structure and interactions of all of its molecules. Monitoring membrane orientation at a local level is rather challenging but could reward crucial information on protein conformation and interactions in the lipid bilayer. We monitored local lipid ordering changes upon varying the cholesterol concentration using pola...

Steerable filters have been used to analyze local orientation patterns in imagery. Such filters are typically based on directional derivatives, whose symmetry produces orientation responses that are periodic with period pi, independent of image structure. We present a more general set of steerable filters that alleviate this problem.