Variations in the anatomical relationship of the gonadal arteries to the renal vessels are frequently reported. We present, on a male cadaver, an unusual origin and course of a left testicular artery arching over the left renal vein along with double renal arteries. The development of this anomaly is discussed in detail. Compression of the left renal vein between the abdominal aorta and the sup...

One of the important parameters in undercut slopes design is the determination of the maximum stable undercut span. The maximum stable undercut span is a function of slope geometry, the strength parameters of the slope material, condition of discontinuities, underground water condition, etc. However, the desired production capacity and therefore the size of excavating equipment will sometimes a...

In this paper, the compression drive mechanism, which can be considered as most related oil mechanism with reservoir geomechanical properties, has been investigated. The constant total vertical stress on and uniaxial compaction zero lateral strain are two main assumptions in conventional modeling. These not considering arching, leads to a reduction also affects distribution of horizontal stress...

We present a new approach to the modelling of stress propagation in static granular media, focussing on the conical sandpile constructed from a point source. We view the medium as consisting of cohesionless hard particles held up by static frictional forces; these are subject to microscopic indeterminacy which corresponds macroscopically to the fact that the equations of stress continuity are i...

We simulate the tapping of a bed of hard disks in a rectangular box by using a pseudodynamic algorithm. In these simulations, arches are unambiguously defined and we can analyze their properties as a function of the tapping amplitude. We find that an order-disorder transition occurs within a narrow range of tapping amplitudes as has been seen by others. Arches are always present in the system a...

A new approach is proposed to evaluate the non-limit active earth pressure in c–? soil based on horizontal slices method and limit equilibrium method, which takes into account arching effect, displacement, mobilized friction angle, tension cracks, shear stress of layer. The accuracy was demonstrated by comparing experimental results other theoretical methods. comparison showed that appropriate ...