(AM); discrepancies in coding were resolved after discussion and agreement on the final coding.
The results were presented as frequencies. As the journal samples from the three indexingdatabase were formed using different methodology, we did
The introduction of bibliometric indicators to compare the scientific performance of countries soon raised questions about what document types should be counted for comparison. The present study deals with the development of different document types published in journals related to Physics and recorded in the Science Citation Index. We first take a look at the evolution of the production and citation of papers by document type as well as at the specialization of countries in different document types. We then highlight some characteristics of the ISI document type category "Proceedings" followed by an analysis of publishers and average number of "Proceedings" pages.
Authors:Deqiao Tian, Yunzhou Yu, Yumin Wang, and Tao Zheng
and variety of SCI literature relating to these important pathogenic microorganisms, published by scientists from the US and China from 1996 to 2010 by searching the Science Citation Indexdatabase. This type of comparison provides useful information
Authors:Peng Hui Lv, Gui-Fang Wang, Yong Wan, Jia Liu, Qing Liu, and Fei-cheng Ma
Graphene is a rising star as one of the promising materials with many applications. Its global literature increased fast in recent years. In this work, bibliometric analysis and knowledge visualization technology were applied to evaluate global scientific production and developing trend of graphene research. The data were collected from 1991 to 2010 from the Science Citation Index database, Conference Proceeding Citation Index database and Derwent Innovation Index database integrated by Thomson Reuters. The published papers from different subjects, journals, authors, countries and keywords distributed in several aspects of research topics proved that graphene research increased rapidly over past 20 years and boosted in recent 5 years. The distinctions in knowledge map show that the clusters distributed regularly in keywords of applied patents in recent 5 years due to the potential applications of graphene research gradually found. The analytical results provided several key findings of bibliometrics trend.
Authors:Rodrigo Costas and Isabel Iribarren-Maestro
The CD-ROM and web versions of the Science Citation Index databases are compared as to their content and format features.
Several differences have been detected such as the use of different punctuation marks in both versions and a different organisation
of author’s affiliation data. These differences make automatic comparisons of ISI products difficult and they should be considered
when matching both databases. Some recommendations to ensure more normalisation and reliability of data are pointed out.
In order to quantify the influence of publication languages on the rate of citation of scientific articles, such East German journals from the Science Citation Index database were selected which publish relevant shares of contributions in several languages, especially in English and German. For a fixed period of time (1988) the selective citation impact of both English- and German-language articles was calculated. The results of our investigation reveal a non-uniform picture: In some cases English-language papers exhibit a significantly higher citations-per-paper average than German-language articles, but in a few cases German-language publications achieve a higher mean citation rate. For the half of selected journals there does not exist a statistically significant difference of citation frequencies of publications in both languages. Possible causes of these phenomena (editorial practice of journals, native countries of authors) are considered.
During the last decade, we have witnessed a sustained growth of South Korea’s research output in terms of the world share
of publications in the Science Citation Index database. However, Korea’s citation performance is not yet as competitive as
publication performance. In this study, the authors examine the intellectual structure of Korean S&T field based on social
network analysis of journal-journal citation data using the ten Korean SCI journals as seed journals. The results reveal that
Korean SCI journals function more like publication places, neither research channels nor information sources among national
scientists. Thus, these journals may provide Korean scholars with access to international scientific communities by facilitating
the respective entry barriers. However, there are no citation relations based on their Korean background. Furthermore, we
intend to draw some policy implications which may be helpful to increase Korea’s research potential.
Simple quantitative indices of pair-wise journal citation relatedness (based on the numbers of references given to and received from a journal title, which are provided by Science Citation Index database) are translated by an automatic clustering procedure into a meaningful map diagram reflecting topical relatedness of journals within a field of science. Such a map for 60 journals in marine and freshwater biology and related sciences published in 1987 reveals a tight cluster of marine biology journals quite distinct from the freshwater biology journal cluster and from the fisheries cluster. The journals within the marine biology cluster and those with strongest pair-wise links with them can be regarded as the core journals in marine biology. Indices of unilateral citation relatedness are used to obtain diagrams, which we term citograms. The citograms visualize patterns of citation relatedness of a journal (its citing and being cited). Journal self-citation can be meaningfully estimated using the bilateral index of relatedness. Self-citation is high in specialized or regional journal titles. It also appears to be quite substantial in journals of broader scope, which possibly reflect authors' subjective preferences.
Despite the extensive studies conducted in the field of nanotechnology based on US patent data, the choice of a single database may impede a wider view of this technology frontier. Based on patent data from the Derwent Innovation Index database that covers the data of 41 major patent offices, we review the development of nanotechnology patenting from the dimensions of patenting authority and technological classification. We find that a small number of countries dominating the technology have similar technological diversity in terms of nanotechnology patents. After the discussion and summary of the citation modes and citation rate curve, we construct the patent citation networks at the patent document level and discuss the distinctive transnational citation patterns. We then use Search Path Count Method to extract the technological trajectory, where we find very high selectiveness. In the final section of this paper, we discover the small world phenomenon in the citation networks, which is widely investigated in undirected networks such as co-authorship networks, but rarely touched in citation networks due to the limitations of the presumptions. We propose the reachable path length and citation clustering in the revised small world model for acyclic directed networks and provide the realistic meaning of the new measures.