INTRODUCTION File fracture is one of the main procedural mishaps in endodontic treatment. The aim of this in vitro study was to compare the fracture rate of three NiTi rotary systems; Hero 642, Mtwo and FlexMaster in artificial canals. METHODS AND MATERIALS In this study, bovine long bone was used. After primary preparation of bones, longitudinal sections with 4-cm diameter were cut and encod...

In his treatises Hero of Alexandria describes a range of devices for producing spectacles and generating wonder that have frequently been treated as marginal by historians of technology and science. In this paper I shall show that these devices and Hero’s emphasis on wonder-making are of central importance to the image that Hero presents of mechanics. Hero uses the concept of wonder to add an i...

Heterogeneous embedded systems on chip (HESoCs) co-integrate a standard host processor with programmable manycore accelerators (PMCAs) to combine general-purpose computing with domain-specific, efficient processing capabilities. While leading companies successfully advance their HESoC products, research lags behind due to the challenges of building a prototyping platform that unites an industry...

Resistance to cyclic flexural fatigue failure is an important feature of rotary nickel-titanium (NiTi) instruments. The aim of this study was to evaluate the cyclic flexural fatigue failure resistance of RevoS Shaper Universal rotary NiTi files and to compare it to two other rotary NiTi files with similar size and taper, the Hero Shaper and the ProFile. Fifteen each of Revo-S Shaper Universal, ...

BACKGROUND Surgical videography can provide analytical self-examination for the surgeon, teaching opportunities for trainees, and allow for surgical case presentations. This study examined if a modified GoPro Hero 4 camera with a 25 mm lens could prove to be a cost-effective method of surgical videography with enough detail for oculoplastic and strabismus surgery. METHOD The stock lens mount ...

Purpose – Sport celebrities often endorse their team, their sport, and non-sports-related products. Increased idolizing of sport celebrities by adolescents is one artifact of this promotional practice. Although seemingly innocuous, adolescents who idolize sport celebrities may, as adults, come to worship such celebrities; this unhealthy obsession may afflict 10 percent or more of adults. If ado...

Pocket switched networks (PSNs) take advantage of human mobility to deliver data. Investigations on real-world trace data indicate that human mobility shows an obvious spatial regularity: a human being usually visits a few places at high frequencies. These most frequently visited places form the home of a node, which is exploited in this paper to design two HomE based Relay selectiOn (HERO) alg...

Between 1858 and 1865, the great Scottish historian Thomas Carlyle wrote a 6-volume opus on the life and times of King Frederick the Great of Prussia. This work had followed his 1841 masterpiece “On Heroes, Hero-Worship and the Heroic in History.” In these publications, Carlyle developed what we now call the “Great Man” theory of history. This states that “the history of the world is but a biog...

The career of the hero in the great tragedies of Shakespeare reveals to the audience not only the limits of a self-assertion that would make itself master of an earthly realm that includes the state, family, and private friendships, but also the utter dependence on a primary Good of these institutions and any individual who would live rightly through them. The hero begins by attempting to make ...