Volume 18, Issue 49 (11-2006)
Abstract
In this research work, porous silicon is made by using chemical method. Depending upon H.F density, the amount of porosity of silicon will change. Then an ohmic aluminium contact and gold contact on the porous side of silicon is made. I-V characteristics were plotted for different devices. Experimental results show that these devices are very sensitive with oxygen, so we can use these devices as oxygen sensor.
Volume 18, Issue 57 (1-2004)
Abstract
In this research, 207 vertical electrical sounding (VES), with schlumberger configu-reation in Shooru aquifer, located at 80 km from Zahedan have done and after the data collection the VES were analyzed and interpreted by a Russian geoelectric software (IPI7.61). Using the investigated geoelectrical model of aquifer, the isodepth, isoresistivity and piesometric maps were drawn. Considering the piesometric map the aquifer boundary, aquifer thickness, bedrock maps were determined and the flow direction and the aquifer outlet have been determined The aquifer bedrock generally consists of Slate. In some part of aquifer Shale rocks appeared as small hummocky. According to the geoelectrical two parts divided model the aquifer: a) the eastern part with an average thickness of 30 meter, and b) the western part with an average thickness of 40 meter. Using the similarity of fluid flow in porous media and electrical current in porous material and using the geoelectrical parameters of aquifer the hydrogeological parameters such as porosity, specific yield, storage volume and volume of recoverable ground water were determined. The porosity and specific yield of aquifer were estimated as 0.37 and 0.18 respectively. The recoverable volume of water from aquifer was estimates as 8.55*108 cubic meters.
