underground economy affects important indexes such as formal gdp, unemployment, consumption, production and etc. therefore it is necessary to identify elements and factors which affect underground economy to restrict it. surveys and studies indicate the size of iran’s underground economy is high and taxes, quantity and quality of regulations and performance of formal economy are the important f...

Interest in underground space development is increasing owing to overcrowding urban areas, and this trend expected continue the future. Therefore, there exists a need systematically establish manage information on spaces. This includes both physical status, that indicates location or shape of space, status property rights related ownership use space. In study, technique register an entire shopp...

Agricultural droughts are droughts that affect the crop production or the ecology of a region. Ravar city that is located in margin of desert and the north of Kerman province is one of these areas. Due to the existence of enough underground water that entrance to desert and high evaporation to improving agricultural and cultivar activities, it needed to study the construction of underground dam...

Agricultural droughts are droughts that affect the crop production or the ecology of a region. Ravar city that is located in margin of desert and the north of Kerman province is one of these areas. Due to the existence of enough underground water that entrance to desert and high evaporation to improving agricultural and cultivar activities, it needed to study the construction of underground dam...

A novel approach combining microfluidics with 2-D modeling validates the proposed microbial growth model for underground hydrogen storage and concludes space-limited gradients on pore scale.