Substance Addiction also called as Substance dependence or drug addition is a compulsive need to use drugs in order to function normally. It is commonly misunderstood that drug addicts lack will power or moral principles but, infact drug addiction is a complex phenomenon that is hard to understand. Some substances that have the ability to cause addiction are Heroin, Cocaine, Tobacco, Barbiturates, Benzodiazepines etc. High-impact journals are those considered to be highly influential in their respective fields. 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 September, 2014