|Human skin is the covering, or integument, of the bodyâs surface which helps provide protection and receive sensory stimuli from the external environment. There are three layers of skin such as epidermis, dermis and subcutis. Epidermis forms an outermost layer that contains the primary protective structure, the stratum corneum. A fibrous layer that supports and strengthens the outermost layer is the dermis. Subcutis is a subcutaneous layer that is present under dermis. It supplies nutrients to the other two layers and covers and insulates the body.
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.