Some bibliometric methods for the assessment of the publication activity of research units are discussed on the basis of impact factors and citations of papers. Average subfield impact factor of periodicals representing subfields in chemistry is suggested. This indicator characterizes the average citedness of a paper in a given subfield. Comparing the total sum of impact factors of corresponding periodicals divided by the number of papers published by a research team to the average subfield impact factor a publication strategy indicator can be derived. A new bibliometric indicator, relative subfield impact, is introduced which compares the number of citations received by papers of a research unit to the average subfield impact factor.
On the basis of investigating author's opinion on citing motivations of chemistry papers aquasi-quantitative model for citing is suggested. The model selects professional and nonprofessional motivations of citing and introduces thecitation threshold concept which tries to characterize the effect of citing motivations quantitatively. Possible reasons for missing citations are also treated. Mean ages of real and of self-citations were calculated by subtracting the average of the publication years of cited papers from the publication year of the citing publication. The difference between the mean ages may characterize thesynchronity of the author's research in comparison with those working on similar topics. The paper introduces thecitation strategy indicator which relates impact factors of cited periodicals with the mean impact factor of periodicals in the corresponding research subfield.
An attempt is made for the survey and classification of bibliometric indicators applicable for assessment of publication performance of researchers active in natural sciences. Indicators can be classified as publication and citation ones which may refer to impact and quantity of publication activity of researcher(s), teams, institutes or countries. Taking into account the possible reference standards, the indicators are classified as simple, specific, balance, distribution and relative ones. In order to evaluate publication activity both qualitatively and quantitatively, relative citation indicators can be recommended, which relate citations received to the sum of impact factors of the journals, where the papers were published or give the relative measure of the average citedness of papers related to that of papers in journals in a similar subfield.
In order to characterize the relative publication output of countries both qualitatively and quantitatively two indicators [Weighted Impact of Publications (WIP) and Relative Contribution Score (RCS)] are suggested. The RCS indicatory may reflect the contribution of countries to the world science by inhabitants.
In the present work an attempt is made to select journal bases for some subfields in chemistry. Through the modification of the Hirst's discioline impact factor concept, theprimary information base for the selected subfields is detenained. Relating impact factors of citing and cited journals,citation strategy indicators are suggested. Determination of the mean impact factors for subfields enables the introduction ofsubfields factors that bring the impact factors of journals of various subfields on a comparavle level.
50 pharmaceutical patents granted to firms, residing in US, GB, DE and HU each, were surveyed and the average numbers of scientific as well as patent itemsReferenced by the inventors were calculated. The sum of impact factors of the journals referenced (Total Weighted Impact) was calculated by scientific fields. About 50–60 per cent of scientific information referred to in the patents was found to originate from Life Sciences journals. It was found that 10 per cent of the journals referenced contained 55 per cent of the papers.
Relations of three relative scientometric indicators (Relative Citation Rate, RCR, Relative Subfield Citedness, RW, and Relative Publication Strategy, RPS) are studied. RW can be calculated by the percentage share of citations divided by that of publications. The findings indicate that publishing
in journals with relatively high impact factor is a necessary but not sufficient condition for attaining a high RW index.
Activities of research institutes of the Hungarian Academy of Sciences were assessed multidimensionally. Taking into accountgoals and tasks of the institutes,weighted scientometric indicators were suggested. The weights of the individual indexes weredistributed among the institutes by the values of their indicators. The sum of the individual weighted scores representing special aspects
of the total activity yields aGeneral Performance Index (GPI) which, together with a thorough peer review, may be used for distributing grants.
Comparative investigation of frequency and strength of motives of authors toward referencing proves that references-citations
can be used for exploring information links between items referencing and referenced. Asreferencing can be assumed as apeer evaluation process resulted in referencing some papers and neglecting others, citations obtained can be applied for assessing international
impact of scientific publication activity.