The travertine deposit springs are located on the southeast of the Damavand Volcano, 85 km northeast of Tehran Province. The deposits of these springs mainly outcropped with cascade, hill, conical, layered, calcareous Tufa and Fissure-Ridges morphologies. Travertine studies have usually been conducted based on field observations, geochemistry and hydrology. The tectonic activity of the region, ...

a new model is proposed for two-dimensional simulation of the concrete fracture in compression. the model generated by using the voronoi diagram method and with considering random shape and distribution of full graded aggregates at the mesoscopic level. the aggregates modeled by combining irregular polygons, which then is placed into the concrete with no intersection between them. by this new m...

The meaning of orbital energies (OOEs) in Kohn-Sham (KS) density functional theory (DFT) is subject to a longstanding controversy. In local, semilocal, and hybrid density functionals (DFs) a Koopmans' approach, where OOEs approximate negative ionization potentials (IPs), is unreliable. We discuss a methodology based on the Baer-Neuhauser-Livshits range-separated hybrid DFs for which Koopmans' a...

The Geneva group had earlier found factors linking transcription activation to the nuclear pore. They now use a nuclease fused to a nuclear pore protein, which clips any DNA that comes to the nuclear pore for a visit. The regions preferentially cleaved by the nuclease were just upstream of 40% of genes on chromosome VI. Constitutively expressed genes use different promoter elements and may not ...

it is at once evident that the author endeavours to answer the ancient questions: "What is Art? What is Man?" To achieve this goal he pursues innumerable fields of study and first directs his efforts to the Old and New Testament. He views these stories as epics written by poets. With the help of numerous quotations from the Bible and from elsewhere he convinces us that we are dominated by the O...

This paper presents the results of a recent project of IKCo’s research center to modify Paykan 1600’s rear suspension mechanism with the purpose of improving comfort, stability and handling qualities. The car was originally equipped with a solid rear axle with leaf springs. By replacing the original mechanism with a three-link mechanism with panhard bar and coil springs, the ride comfort and ha...