The scientific productions of authors in the geology discipline in Web of Science (WOS) based on Bradford law and Lotka law

The purpose of this study is Evaluation of reliability of Bradford law and Lotka law، two of the main and basic rules of scientomerics، In terms of current information، in order to test the frequency distribution of scientific productivity of authors and the scientific Production of them in journals. This study is descriptive - analysis and scientomtrics indicators have been used. For data analysis with Lotka law، the number of productions of authors was calculated. Then، to ensure results and confirmed the results mentioned، LOTKA software was also imposed. In order to test data on Bradford''s law، this law was also used. The results showed that the scientific production of authors in the field of geology during 1990 to 2010 is not confirmed by Lotka law and the law was not dominating in this study. While in reviewing of Bradford law، the results indicates that Bradford is confirmed for the scientific outputs of authors is in the period of study. The results showed that in the test Lotka law with scientific outputs of authors in the field of geology during 1990 to 2010، this law was not approved. It seems that with the changes in co-authorship of scientific outputs، this law is not dominant and requires further investigation، so as a general principle، at all times، be used. In reviewing Bradford law، the results show that this law has been confirmed in the scientific outputs of the authors in the field of geology in the period of study. whereas the authors are used as subjects of the articles. In other words، the greatest number of authors (as topics of articles) has produced the lowest number of scientific outputs that these documents are the core documents and by the greatest participation of authors have written