the aim of this research is to analyse of empirical relationship of fiscal policy and iranian trade account in the years 1338-1385(1959-2006). in and econometrics model the methods of engle and granger (1987), johansen (1988), ardl, pessaran and shin(1998), philips and hansen(1990), have been used to find out the effects of variables such as government expenditures(the component of public deman...

I investigate band and Mott insulating states in a two-band Hubbard model, with the aim of understanding the differences between the idealised oneorbital model and the more realistic multi-band case. Using a projection ansatz I show that additional orbitals suppress the metal-insulator transition, leading to a critical coupling of approximately eight times the bare band-width. I also demonstrat...

PURPOSE Circumcision is one of the historical surgical procedures. Some sources throughout the history contain various definitions about different circumcision methods. we described the details of the method, and aimed to remind the possibility of contemporary usage. MATERIALS AND METHODS We compared circumcision chapters of Sabuncuoglu and Zahrawi to explain the historical origin of Sabuncuo...