Based on a newly developed size-dependent cohesive energy formula for two-dimensional materials, a unified theoretical model was established to illustrate the gap openings in disordered graphene flakes, involving quantum dots, nanoribbons and nanoporous sheets. It tells us that the openings are essentially dominated by the variation in cohesive energy of C atoms, associated to the edge physicoc...

ao"length of opening dh, dl"distance from top of steel section to centroid of concrete force at high and low moment ends of the opening, respectively dr"distance from outside edge of flange to centroid of reinforcement *b"maximum bending deflection for unperforated beam *m,b"maximum bending deflection for a member with an opening Fy"yield stress of steel FM y"reduced axial strength of steel in ...

The aim of this study was to analyze the relationship among the point of greatest depression on the root trifurcation floor and the furcation openings of the maxillary second molars. Sixty human extracted upper permanent second molars were analyzed and the furcation area were measured using a vertical calliper, and the values regarding the point of deepest depression were recorded. The results ...

Pentobarbital (PB) and picrotoxin (PIC) bind to allosterically coupled sites on the GABAA receptor complex but have opposite effects on GABA receptor currents. PB, an anesthetic/anticonvulsant, enhances, and PIC, a convulsant, inhibits GABA receptor currents. PB and PIC also had opposite effects on single main conductance channel GABA receptor currents recorded from excised outside-out patches ...

Nasal bone fractures are the most common type of facial fracture. Closed reduction has been used as the standard treatment modality for nasal fractures for many years. In cases of nasal fracture with lacerations at the fracture sites, bioabsorbable/metallic plate or interfragment wire fixation can be used with accurate alignment through the openings created by the lacerations. However, in cases...

the history of five thousand years of human civilization (with only 292 years with no war) and the experiencesof the past two decades of our country shows that the enemies’ approach is based on strong air attack just inthe first month, and civilians bombarding begins if the spirit of national defense continues after two weeks.so the buildings in the cities are damaged in different ways by the a...

Eustachian tube function is important in pressure regulation of the middle ear. The efficacy or magnitude of pressure equilibration by tube openings should be determined by the gradient between middle ear and ambient pressure, but in theory also the duration of the tube opening may play a role. This study employed direct measurements of middle ear pressure in patients, who after parotidectomy h...