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Showing 3 results for Sohrabi
Transient Site Response Analysis of Nonhomogeneous Two-dimensional Topographic Features Using BEM
M. Kamalian and A. Sohrabi Bidar,
Volume 24, Issue 2 (1-2006)
Abstract
This paper presents the complete algorithm of site response analysis of nonhomogeneous topographic structures using transient two-dimensional boundary element method (BEM). Seismic behaviour of various topographic features including canyon, half plane, sedimentary filled valley and ridge sections, subjected to incident SV and P waves are analysed. The analysis shows the efficiency of the proposed algorithm and its advantage over common transformed domains methods in forming a basis for extension to non-linear behaviour.
Seismic Behavior of 2D Semi-Sine Shaped Hills against Vertically Propagating Incident Waves
M. Kamalian, M.k. Jafari and A. Sohrabi-Bidar,
Volume 26, Issue 1 (7-2007)
Abstract
This paper presents the preliminary results of an extensive parametric study on seismic response of two-dimensional semi-sine shaped hills to vertically propagating incident P- and SV-waves. Clear perspectives of the induced diffraction and amplification patterns are given by investigation of time-domain and frequency-domain responses. It is shown that site geometry, wave characteristics , and material parameters are the key parameters governing the hill’s response, simple formula and some tables are proposed for estimating the characteristic site period and also the average amplification potential of semi-sine shaped hills, which could be easily applied in site effect microzonation studies of topographic areas.
Fabrication of Poly(ε-Caprolactone), Hydrophilic and β-Tricalcium Phosphate Layer- by -Layer Nanofibrous Scaffolds for Tissue Engineering
M. Sohrabi, M. Abbasi, M. M Ansar,
Volume 38, Issue 1 (Journal of Advanced Materials-Spring 2019)
Abstract
In this study, using biodegradable polymers, nanofiberouse scaffolds were fabricated from the layer-by-layer electrospinning method, including two layer that poly (ε-caprolactone), polyvinylpyrrolidone deposited at first layer and poly (ε-caprolactone), polyvinyl alcohol , β-tricalcium phosphate at latter. After prepration of scaffolds, scanning electron microscopy (SEM), swelling, porosity, mechanical properties and biodegradability behavior in buffered saline phosphate solution were  studied. The results confirmed the bioactivity  and suitable mechanical properties of the layer-by-layer scaffold. The swelling increase with the addition of hydrophilic polymers and reache 811 ± 214 % in the layer-by-layer scaffold, which reveald a significant difference compared to pure PCL. The MTT test on the layer-by-layer scaffold, after 3, 5 and 7 days of rats bone marrow stem cells (rMSC) culture, showed the cell viability of above 80% moreover, cells morphology on the scafold indicated the optimal compatibility of  cells on the scaffold.

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