This is the extended version of a Comment submitted to Physical Review Letters. I first point out the inappropriateness of publishing a Letter unrelated to physics. Next, I give experimental results showing that the technique used in the Letter is 3 times worse and 17 times slower than a simple baseline. And finally, I review the literature, showing that the ideas of the Letter are not novel. I...

statement of problem: endodontic treatment of necrotic teeth with open apices is a challenge. after ruling out surgery as a treatment scheme and introduction of the multivisit apexification which in turn had its disadvantages, apical plug seems to be a suitable substitute treatment plan for such cases. apical plug makes the treatment through formation of a barrier against the obturating materia...

Graph hierarchies, the data structures that result from hierarchically clustering the nodes of a graph, are widely used as a multi-scale way of representing data in many computing fields, including image segmentation, mesh simplification, hierarchical pathfinding and visualisation. As a result, significant efforts have been made over the years to find ways of constructing ‘good’ graph hierarchi...

We study the relation between the discrete–time version of the flashing ratchet known as Parrondo’s games and a compression technique used very recently with thermal ratchets for evaluating the transfer of information – negentropy – between the Brownian particle and the source of fluctuations. We present some results concerning different versions of Parrondo’s games showing, for each case, a go...

A novel mechanism of SWNT nucleation is considered in oppose to an existing model. The latter model based on the formation of a hemispherical carbon bowl nucleus has no correct description within the thermodynamics and kinetics of the nucleation process. The new mechanism can explain the prevalent formation of [10,10] armchair nanotube on the base of the continuum graphene energetics.

This is the extended version of a Comment submitted to Physical Review Letters. I first point out the inappropriateness of publishing a Letter unrelated to physics. Next, I give experimental results showing that the technique used in the Letter is 3 times worse and 17 times slower than a simple baseline. And finally, I review the literature, showing that the ideas of the Letter are not novel. I...