Double-walled TiO2 nanotubes with porous wall morphologies are fabricated by anodization under ultraviolet (UV) irradiation. TiO2 formed by anodization of Ti is activated to generate electrons and holes by UV and the anodization process is influenced by the photo-generated charges. As a consequence, morphologies of the fabricated TiO2 nanotubes can be adjusted by controlling the UV illumination...

The paper presents a finite element formulation for analysis of 3D framed structures with thin-walled laminated composite cross-sections, using co-rotational approach. considers the effects large displacements on response space frames subjected to conservative and static external loads. Classical lamination theory thin fiber-reinforced laminates has been employed. Stability is performed in load...

The results of the assessment dynamic behavior three-layer cylindrical shells circular and elliptical cross-sections under internal impulse loading are given. finite-element method was used to calculate indicators stress-strain state (SSS) such structures by NASTRAN software complex. values normal deflections stresses three forms intersection determined. A comparative analysis these with uneven...

The backscattering contribution to the conductivity, irrelevant for metallic single-walled carbon nanotubes, is proved to become much significant for doped semiconducting systems, in agreement with experiments. In the case of multi-walled nanotubes, the intershell coupling is further shown to enhance the contribution of backscattering for ”metallic” double-walled, whereas it remains insignifica...

A novel wavy-walled bioreactor designed to enhance mixing at controlled shear stress levels was used to culture chondrocytes in suspension. Chondrocyte aggregation in suspensions mixed at 30, 50, and 80 rpm was characterized in the wavy-walled bioreactor and compared with that in conventional smooth-walled and baffled-walled spinner flask bioreactors. Aggregation was characterized in terms of t...