The surrounding of a living organism where it lives and conjugates with the non-living organisms for their better survival. Ecosystem includes both biotic and abiotic factors connected with each other through nutrient cycles and energy flows. All living organisms like flora and fauna are the essentials components of biotic factors and components like water, land, air, energy are the essential forms of abiotic factors. When the biotic factors are connected with the abiotic factors they form an ecosystem.
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