Fretting cracking behavior of nub of last-stage blade for steam turbine

Journal of Mechanical Science and Technology - Nub-and-sleeve of last-stage blade for steam turbine is a part-span damper. The nub is vulnerable to fretting cracking since it is in contact with the...     

Development of a novel successive suturing instrument for an endoscope using beads and a side suction cap

The large number of patients who suffer from diseases such as gastritis, obesity, and chronic gastro-esophageal reflux disease has made the development of a new suture device using an endoscope instrument channel an important priority. This paper deals with a novel design of an endoscopic instrument that facilitates suture operations on the stomach and esophagus. Unlike a laparoscope, it is very difficult to transfer forces and moments to the end of a gastrointestinal endoscope from the outside handle dues to its extreme flexibility. The only feasible forces are pushing and pulling using wires and tubes. This new design requires only the push-pull action from the outside handle to complete suture operations. Furthermore, several stitches can be performed with a single endoscope insertion. This new endoscope suturing methodology thus significantly reduces the time for surgical operations and the pain that patients experience. The feasibility of the instrument was demonstrated through in vitro and in vivo animal experiments.     

Collider physics based on e-Science paradigm of experiment–computing–theory

Researches in the 21st century are characterized by e-Science paradigm, which is the data centric analysis as a unified concept of experiment–computing–theory. In this paper the e-Science paradigm has been realized in collider physics by constructing the unified research environment of experiment–theory and theory–computing as well as that of computing–experiment performed at KISTI (Korea Institute of Science and Technology Information). In other words, the fusion concept of collider physics of experiment, computing and theory has been applied. The goal of this approach is to study collider physics anytime, anywhere for more efficient research process. The construction of e-Science paradigm of experiment, computing and theory in collider physics provides us with new research methodology in computational physics.     

Analysis of fretting cracking condition for nub of steam turbine blade

Journal of Mechanical Science and Technology - Nub-and-sleeve of last-stage blade for steam turbine is a part-span damper. The nub is susceptible to fretting cracking since the nub is in contact...