flood flow importance enforces we to simulate its components exactly. in this study, saint-venant equations in conservative form are usedto simulate one-dimensional rapidly varied flow in the river. upstream methods of godunov family in finite volume frame work are used to numerical solution. according to flow conditions in the river, the equations used are included in the source term of the be...

The COUP (chicken ovalbumin upstream promoter) transcription factor binds to the upstream promoters of both the chicken ovalbumin and the rat insulin II genes, even though the two binding sites have no obvious sequence similarity (Hwung, Y.-P., Crowe, D. T., Wang, L.-H., Tsai, S. Y., and Tsai, M.-J. (1988) Mol. Cell. Biol. 8, 2070-2077). Comparison of the contact points and important nucleotide...

Hydraulic jump on adverse stilling basin is an unstable phenomenon which causes some complexities in controlling of the   jump. This paper considers the stability of free hydraulic jump on adverse stilling basins from a theoretical point of view. A minimum value of upstream Froude number is needed to produce the free hydraulic jump on adverse stilling basins which was presented by a theoretical...

We obtained an 11 subunit model of RNA polymerase (Pol) III by combining a homology model of the nine subunit core enzyme with a new X-ray structure of the subcomplex C17/25. Compared to Pol II, Pol III shows a conserved active center for RNA synthesis but a structurally different upstream face for specific initiation complex assembly during promoter selection. The Pol III upstream face include...

A soil nailing system is a proven effective and economic method used to stabilize earth slopes from the external (factors increasing shear stress) internal decreasing material strength) failure causes. The laboratory models with scales of 1:10 are study behavior nailed slope different building foundation parameters. consist Perspex strips as facing steel bars increase stability slope. sand beds...

Density or gravity currents have been always one of the main causes for sedimentation along many of the dam reservoirs. So controlling this phenomenon is very important for increasing useful life of such reservoirs. In this research study the effect of a combination of rough bed and obstacle on the control of sedimentary density current has been investigated. Experiments were conducted in a til...

Many rodents tactually sense the world through active motions of their vibrissae (whiskers), which are regularly arranged in rows and columns (arcs) on the face. The present study quantifies several geometric parameters of rat whiskers that determine the tactile information acquired. Findings include the following. 1) A meta-analysis of seven studies shows that whisker base diameter varies with...