Cognitive structure of research: Scientometric mapping in sintered materials

Visualizing knowledge domains

“…Semantic maps, often known as co‐word analyses, are used to understand the cognitive structure of a field (Bhattacharya & Basu, 1998; Cahlik, 2000; DeLooze & Lemarie, 1997; He, 1999; Salvador & LopezMartinez, 2000). These maps are generated from different textual sources including single words extracted from titles of articles, descriptive terms, or publisher‐assigned descriptors supplied by a database vendor (e.g., ISI keywords).…”

35 years and 160,000 articles: A bibliometric exploration of the evolution of ecology

“…The source words can come from keyword lists, titles, abstracts, or other publication data fields. In past studies, researchers have used a variety of techniques to create clusters from bibliometric data, including factor analysis [WHITE & MCCAIN, 1998], principal component analysis [SALVADOR & LOPEZ-MARTINEZ, 2000], and hierarchical clustering [BORNER& AL., 2003;COULTER & AL., 1998;BAUIN & AL., 1991;WHITE & MCCAIN, 1998]. …”

Fluorine research in South Africa and four benchmarking countries: Comparative mapping and assessment

“…The combined databases cover comprehensively the most prestigious journals in the world in all fields of research endeavours and constitute a unique information platform for the objectives of this effort. The databases are used extensively for similar type of investigations (SALVADOR et al 2006;COSTAS et al (2005);LUWEL et al (1999); MOLATUDI et al 2006;POURIS, 2003;POURIS, 2007;CARAYANNIS et al 2004 and others) While the ISI databases are among the most comprehensive sources of readily accessible information on national research outputs, they have certain limitations that have been discussed extensively in the literature (OKUBO 1997;COZZENS 1989;5 CARPENTER 1981;GARFIELD 1979). However, in South Africa there is an effort by the educational authorities and the Universities administrations to publish mainly in the ISI journals.…”