Analysis of vibration mitigation for CFG pile-supported subgrade of high-speed railway

Modelling of critical speed of railway tracks on a multi-layered transversely isotropic saturated ground

Laboratory and numerical investigation on the behavior of reclaimed asphalt pavement (RAP) as railway track subballast layer

Three-dimensional numerical simulation of the geometrical dimension pile group effects on the critical speed of high-speed railway track (Case study: Tehran- Isfahan high speed railway track)

This study is examining the relationship between market share and profitability in Tehran stock exchange. The relationship between market share and profitability is perhaps the most studied single phenomenon in business policy, but research in to the correlation between market share and profitability has led to debate over whether the observed association is direct or spurious. Using structure equations and PLS software, this study examines this relationship for superior firms (considering their sales). Finally, this research finding indicate the relationship between market share and profitability depends upon restrictive statistical assumption, when these assumption are relaxed, the result show that there is no significant direct association between market share and profitability, and spurious effects account for at least a sizable component of the measured association. Also the finding of this research proved association between profitability and growth industry, short-term firm growth, prior performance, general economic activity and the finding indicate there is a strong association between current year return and return from the prior year.

Mojtaba Sabbaghi

Papers

Three-dimensional numerical simulation of the geometrical dimension pile group effects on the critical speed of high-speed railway track (Case study: Tehran- Isfahan high speed railway track)

The Study of Relationship Between Market Share and Profitability in Tehran Stock Exchange