DNA wrapping is an important mechanism for chromosomal DNA packaging in cells and viruses. Previous studies of DNA wrapping have been performed mostly on torsionally unconstrained DNA, while in vivo DNA is often under torsional constraint. In this study, we extend a previously proposed theoretical model for wrapping of torsionally unconstrained DNA to a new model including the contribution of D...

A gauze sponge wrapping method to prevent recurrent subarachnoid hemorrhage (SAH) after incomplete obliteration of intracranial aneurysm or a residual neck after clipping was developed and tested. The authors performed the gauze wrapping for aneurysms with incomplete obliteration by clipping alone, abnormal changes of the parent artery wall which had the possibility of regrowth or rerupture, an...

Consider wrapping the unit cube with a square without stretching or cutting. Beebee demonstrated such a wrapping with a square of side length 2 √ 2, and proved that no smaller square can fulfill the task [1]. We show that Beebee’s construction is the unique optimal wrapping, up to the symmetries of the unit cube and the placement of the junk material.

Cellular internalization of nanoparticles requires the full wrapping of the nanoparticles by the cell membrane. This wrapping process can occur spontaneously if the adhesive interactions between the nanoparticles and the membranes are sufficiently strong to compensate for the cost of membrane bending. In this article, we show that the membrane curvature prior to wrapping plays a key role for th...

Given a set S of n non-intersecting line segments in the plane, we present an algorithm that computes the 2n visibility polygons of the endpoints of S, in output sensitive time. The algorithm relies on the ordered endpoint visibility graph information to traverse the endpoints of S in a spiral-like manner using a combination of Jarvis' March and depthrst search. One extension of this result is ...