The xerogel samples were prepared by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) by the sol-gel method. In this investigation, a new molar ratio of H2O/TEOS was determined to be 11.7. Also, the necessary amounts of tri-hydrated copper nitrate and penta-hydrated copper sulfate were added to the solution in such a manner that the concentration of the copper oxide in final solut...

Documenting the process of consumer attitude formation toward brand extensions has proved elusive, with variations in results between Aaker & Keller’s original study and subsequent replications. This study moves beyond the student sample and adjusts for multicollinearity, providing a robust empirical foundation for generalising components of the original model. It provides general support for t...

I show how a minor modification of the Alcubierre geometry can dramatically improve the total energy requirements for a ‘warp bubble’ that can be used to transport macroscopic objects. A spacetime is presented for which the total negative mass needed is only in the order of grams, accompanied by a negligible amount of positive energy. This constitutes a reduction of the absolute value of the en...

Electrochemical behavior of acid orange 7 has been exhaustively studied in aqueous solutions with different pH values, using cyclic voltammetry and constant current coulometry. This study has provided new insights into the mechanistic details, pH dependence and intermediate structure of both electrochemical oxidation and reduction of acid orange 7. Surprisingly, the results indicate that a same...