Dome-shaped microresonators and the Born-Oppenheimer method

A novel method for laser forming of two-step bending of a dome shaped part

In recent decades, one of the challenges in sheet metal forming was production of two-step bending surfaces without mechanical tools and external force or by a combination of heat source and mechanical tools. Forming with a heat source such as laser beam has the potential for forming arbitrary 3D shapes such as two-step bending surfaces. In this paper a novel method for laser forming of complic...

Comparative comparison of architecture patterns of Iranian and Turkish mosques turning to the ottoman era

In the far pasts, Turkey was one of the countries with diverse civilizations. It has been rich and affected by Byzantine architecture of the architectural view point. The entry of Islam into Turkey and the formation of Islamic governments during the Ottoman era led to the formation of a particular type of Islamic architecture in Turkey. The architecture of Turkey mosques is one of the most prom...

Thermal Behavior of Domed Roofs, Case Study: Historical Dome-Shaped Roofs of Isfahan

Direct observation of Born-Oppenheimer approximation breakdown in carbon nanotubes.

Raman spectra and electrical conductance of individual, pristine, suspended, metallic single-walled carbon nanotubes are measured under applied gate potentials. The G(-) band is observed to downshift with small applied gate voltages, with the minima occurring at E(F) = +/-(1)/(2)E(phonon), contrary to adiabatic predictions. A subsequent upshift in the Raman frequency at higher gate voltages res...

Direct determination of electric current in Born–Oppenheimer molecular dynamics

We introduce a new approach to calculate directly the electric current in Born–Oppenheimer molecular dynamics. In this approach the electric current is computed from the adiabatic variations of the Kohn– Sham eigenstates between consecutive time steps. This conceptually straightforward method is fairly efficient and can be easily implemented into existing electronic structure programs. We test ...