In mountainous or hilly areas, the slope aspect affects amount of solar radiation, with direct consequences on species distribution and tree growth. However, little is known how shape volume allometry may be affected by contrasting environmental conditions driven aspect. This study aims to investigate whether aboveground European beech (Fagus sylvatica L.) trees. We used data scanned trees from...

BACKGROUND The multiple uses of HyFlex(®) controlled memory (CM) rotary instruments (Coltene-Whaledent, Allstetten, Switzerland) have been recommended after sterilization. The purpose of this study was to analyze the surface defects on HyFlex(®) instruments after use and to determine their ability to return to their original shape after autoclaving. MATERIALS AND METHODS Twenty-four new HyFle...

gas mixing in a t-shape micro mixer has been simulated using the direct simulation monte carlo (dsmc) method. it is considered that the adequate mixing occurs when the mass composition of the species, co or n2, deviates below 1 % from their equilibrium composition. the mixing coefficient is defined as the ratio of the mixing length to the main channel’s height. as the inlet kn increases, while ...

background: forensic odontology plays important role in identification of human remains in mass disasters such as air crash, tsunami, and accidents. palatal rugae act as an ideal requisite for human identification as they are present in all victims and are resistant to changes such as aging and trauma. the study aimed to analyze differences in shape and number of palatal rugae in population fro...

structural steel sections are mainly used in beams and columns of building frames. iran national steel industrialgroup is among the oldest and largest producers of beams in iran. it has two beam production lines, namely line630 and line 650. in this study, the mechanical properties of manufactured beams in these production lines werecompared. based on the t-test results, the elongation is signi...

spur dike is an important element for protection of river banks. spur dike causes variations in flow field, sediment transport and bed topography. the mechanism of flow and sediment transport in a channel bend is very complex, especially when a spur dike is constructed in a bend. in this paper the time variations of dimension of the scour hole and the bed’s topography were considered around a t...

Gas mixing in a T-shape micro mixer has been simulated using the Direct Simulation Monte Carlo (DSMC) method. It is considered that the adequate mixing occurs when the mass composition of the species, CO or N2, deviates below 1 % from their equilibrium composition. The mixing coefficient is defined as the ratio of the mixing length to the main channel’s height. As the inlet Kn increases, while ...

hydro-forming is a fabrication process that uses a fluid medium to form a piece by using high internal pressure. in tube hydro-forming, a tubular blank is placed between two dies, sealed and pressurized water injected, deforming the tube walls in the cavity form of the dies. exist several typical hydro-forming processes such as t- shapes, cross-shapes and y- shapes. successful hydro-forming dep...