Equal-channel angular pressing (ECAP) combined with the Conform process provides a solution for the continuous production of ultrafine-grained materials. In the present study finite element method was executed to investigate the effects of die channel angle and friction on the strain homogeneity and the required torque in ECAP-Conform process. Deformation behaviour of Al 6061 wires was analyzed...

extended abstract 1. introduction abbasid period can be regarded as an epoch in which poetry and eulogy in persia reached maturity, i.e., in which poetry has become a means of praise and admiration (dayf, 2006, p. 565). the kings of this dynasty gathered a group of flattered eulogists and used them for political announcements (alebadi, 2006, p. 13), by allocating precious gifts of war booty to ...

converting the native rangelands to simplified agronomic communities causessome changes in soil carbon, nitrogen and phosphorus. establishing of perennial plantcommunities on formerly cultivated rangelands is expected to stabilize soil properties andincrease the amount of c, n, p stored in rangeland soils, but there is little information on whatplant communities are the most effective for impro...

this paper investigates the forecasting performance of different time-varying bvar models for iranian inflation. forecast accuracy of a bvar model with litterman’s prior compared with a time-varying bvar model (a version introduced by doan et al., 1984); and a modified time-varying bvar model, where the autoregressive coefficients are held constant and only the deterministic components are allo...

This letter underpins the use of three-dimensional computed tomography (3D-CT) reconstruction as an aid to teach veterinary anatomy. Cases were presented to students in order to observe normal and clinically abnormal patients. The images provided excellent details of relevant structures and could serve as a tool for teaching anatomy. Many sources describe different options to enhance anatomical...

The overly-fast degradation rates of magnesium-based alloys in the biological environment have limited their applications as biodegradable bone implants. In this study, rare earth element yttrium (Y) was introduced into AZ61 magnesium alloy (Mg-6Al-1Zn wt %) to control the degradation rate by laser rapid melting. The results showed that the degradation rate of AZ61 magnesium alloy was slowed do...