Mining is the extraction of valuable minerals or geological materials. Mining is done using two excavation types: Surface mining and sub-surface mining. After excavation, the mineral is processed using techniques like Extractive metallurgy and Mineral processing. There are many environmental issues like erosion, loss of biodiversity and ground water contamination by chemicals from mining processes. Many companies are now enforced to follow good environmental standards.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on June, 2014