Sulfur and oxygen isotopes were employed to identify SO42- sources in surface water and groundwater in the Babu subterranean river basin (BSRB). Our study revealed SO42- enrichment in the BSRB waters compared with adjacent areas. The SO42- in some samples originated mainly from precipitation; in others, it was derived mainly from sulfide dissolution in coal seams or from gypsum dissolution. In ...

This paper will focus on Global Positioning System (GPS) and it’s applied use as technological assistance for dynamic wayfinding. Through an overview of the cognitive strategies utilized in wayfinding i t identifies some of the affordances offered by mobile GPS devices. As background it discusses map use and the acquisition of spatial knowledge, and additionally outlines the nature of spatial d...

The longwall mining method is one of the most applied methods in extracting low-inclined to high-inclined coal seams. Selection of the most suitable extraction equipment is very important in the economical, safety, and productivity aspects of mining operations. There are a lot of parameters affecting the selection of an extraction equipment in mechanized longwall mining in steeply inclined coal...

economic globalization has been formed through last five centries, during which more developed counties in attempt 5 gain profits, influence and more economic lejemony dominated some states and developed their trade, economic and productive activifies. in recent years due 5 technological progress and specially liberalization polies through the world, there has been more progress everywhere. glo...

In neighborhood-based texture synthesis, adjacent local regions need to satisfy color continuity constraints in order to avoid visible seams. Such continuity constraints seriously restrict the variability of synthesized textures, making it impossible to generate new textures by mixing multiple input textures with very different base colors. In this paper, we propose to relax such restrictions a...