background and aims. cad/cam systems facilitate the use of zirconia substructure materials for all-ceramic copings. this in vitro study investigated the marginal and internal fit of zirconia copings made with cad/cam system and slip-casting method. materials and methods. sixteen cad/cam made zirconia copings and 16 slip-cast made zirconia copings were fabricated and cemented with glass-ionomer ...

I N B R I E F We are used to thinking of intelligence as largely a matter of genetic inheritance, but that is not the whole picture. What we do aff ects our mental wellbeing: staying physically and mentally active helps us stay sharp as we age. Nevertheless, our personal eff orts to bolster cognitive enhancement cannot forestall all declines in our cognitive performance. What is especially surp...

4D printing of shape memory polymers enables the production thermoresponsive objects. In this contribution, a facile strategy is followed for an in-house synthesized thermoplastic poly(ether urethane). Processing by means fused filament fabrication, in which difference between nozzle temperature and material-specific glass transition polymer kept as low possible, allows to obtain highly shrinka...

The theoretical expressions commonly used in the design of interference fits do not take into account huge stress concentrations located at edges hub. This underestimation real state can induce incorrect performance shaft–hub assembly. Among different methods to address this problem is use chamfer hubs, which are for reducing such concentrations. In paper, an analysis, performed via finite elem...

Boolean shrink : Boolean ImportedClass

This paper addresses a new surface reconstruction scheme for approximating the isosurface from a set of tomographic cross sectional images. Differently from the novel Marching Cubes (MC) algorithm, our method does not extract the iso-density surface (isosurface) directly from the voxel data but calculates the iso-density point (isopoint) first. After building a coarse initial mesh approximating...

With the development of multimedia technology, image resizing has been raised as a question when the aspect ratio of an examined image should be displayed on a device with a different aspect ratio. Traditional nonuniform scaling for tackling this problemwill lead to distortion. Therefore, content-aware consideration is mostly incorporated in the designing procedure. Such methods generally defin...