New bibliometric tools for the assessment of national research performance: Database description, overview of indicators and first applications

The Citation Analyses of Scientific Publications in the Field of Educational Sciences and Teacher Education in Turkey

“…Literatürde kendine atıflarla ilgili farklı yaklaşımlar bulunmaktadır. Bazı araştırmacılara (Phelan, 1999) göre bireysel Hakemli Makaleler Engin Karadağ, Mikail Yalçın, Koza çiftçi, Şahin danıŞMan, nihan SölpüK, Şule toSuntaŞ, Yusuf aY araştırmaların doğası gereği normal ve kabul edilebilir bir prosedür olarak görülmekte; kimilerine (Aksnes, 2005;Lawani, 1982;Moed, De Bruin ve Van Leeuwen, 1995) göre ise yazarlar ve dergiler kendi bilimsel otoritelerini yaratmak, dergilerini veya çalışmalarını görünür kılmak için bu yolu seçmektedirler.…”

Average-based versus high- and low-impact indicators for the evaluation of scientific distributions

“…In particular, authors from the Leiden group are very aware of the need to include in their battery of indicators some that capture what takes place at the tails of any citation distribution. Thus, together with average-based indicators, since its inception this group has always taken into account the papers published by a research unit that have received no citations at all (see, inter alia Moed et al, 1985, 1988, 1995, and van Raan, 2004. More recently, the Leiden group has turned its attention to the upper tail of the distribution, and has introduced the percentage in the top 5% of the most highly cited papers as an indicator of scientific excellence (see Tijssen et al, 2002, andvan Leeuwen et al, 2003, as well as Aksnes and Sivertsen, 2004).…”

A relational database for bibliometric analysis

“…With the idea of presenting typical examples of bibliometric indicators, I restrict myself basically to the indicators defined in (Moed et al 1995), which represent a broad and quite elaborated set of indicators for the assessment of research performance, and follow their nomenclature. One reason for this choice is the availability of a precise and comprehensive description of how these indicators are calculated.…”

“…The expected (average) citation rates are calculated separately for each different relevant article type (Moed et al 1995) (e. g. normal article, letter, notes, reviews and proceeding papers). Sometimes citation counts excluding self-citations are used.…”

“…Selfcitations at other levels can be excluded following an analogous procedure. According to (Moed et al 1995), a self-citation is defined as pair of a citing paper and a corresponding cited paper that has at least one author in common. The extension compared to the query including self-citations consists of the additional sub-query in the WHERE clause that is connected via the condition NOT EXISTS.…”