This serves to classify the perpetrators in three levels according to their production. Follow others, such as Kerry King, and add to your knowledge base. They also measure the rate of transience, which is the amount of authors responsible for a single job. Movement indicators measure the presence of documents in libraries and bibliographic databases. They are conditioned by the specialization and the language of the publications. These indicators are used to view the distribution of magazines and its coverage in the databases.
The main indicators are: number of circulating works: number of jobs indexed in the databases. Circulation rate: ratio of the number of works circulating and all the work published by a magazine over a period of time. Circulating productivity index: logarithm of the number of circulating jobs. Indicators of dispersion is important to study the dispersion of scientific information due to the great variability of these dispersions, because sometimes, jobs are concentrated in a very small number of magazines, while in others, are dispersed in a very high figure. Sometimes the area of maximum density matches journals, but they frequently coincide with general journals. Indicators of use of scientific literature information consumption is measured through the computation of publications and the analysis of references.
The difference between references and citations is that, in the first, referred to previously published works and citations received from later works. Visibility or impact indicators are based on counts of the number of citations received the documents for a specified period of time or from its publication. The average is 15 references per article. Receipt of citations is very asymmetric.Price said that 50% references are distributed among all the literature and 50% remaining is concentrated in a very small number of jobs, which is what is called the front of research. One of the most used and important indicators is the impact factor (if), which is a measure of the frequency with which the medium of a magazine article has been cited over a period of time.