As a secondary structure of DNA, DNA tetrahedra exhibit intriguing charge transport phenomena and provide promising platform for wide applications like biosensors, as shown in recent electrochemical experiments. Here, we study multi-terminal tetrahedron, finding that its properties strongly depend upon the interplay among contact position, on-site energy disorder, base-pair mismatch. Our result...

This paper presents analytical solutions for the forward displacement and velocity kinematics of the “321-HEXA”, a fully-parallel manipulator design with R-RR-RRR legs as in the “HEXA” design and with a “3-2-1” top platform. The forward position and velocity kinematics rely on simple geometric algorithms that find the position and velocity of the top of a tetrahedron from the knowledge of the t...

Abstract This clinical report presents a case of abutment fracture, due to occlusal overload, occurred with an implant-supported restoration on right mandibular first molar of a female patient. After 6 months of prosthetic reconstruction implants, the patient returned to the clinic due to the loss of implant crown. The fractured fragment of the abutment with the screw protec...

Background: One of the most important issues is the best method to teach embryology course to medical students. Small group discussion (SGD) were used to working together, integral to learningdeveloping intellectual skills and interactive learning experience. Methods: The 72 medical students were equally randomizedto the SGD (group I) and usual lecture based teaching (LBT), (group II) in genera...