Psychological and social systems provide us with a natural domain for the study of anticipations because these systems are based on and operate in terms of intentionality. Psychological systems can...
The relation between Pearson’s correlation coefficient r and Salton’s cosine measure (2008)
The relation between Pearson’s correlation coefficient and Salton’s cosine measure is revealed based on the different possible values of the division of the -norm and the norm of a vector. These...
China ranks second in scientific publications since 2006 (2008)
With the fast development of its economy, China plays an increasingly important role in the world. China's performance in science is also impressive. The exponential growth of Chinese scientific...
Journals as retention mechanisms of scientific growth (2008)
Professor Loet Leydesdorff has spent the last 20 years developing an idea first posed by Derek de Solla Price in 1961. He asks whether the aggregated citation relations among journals can be used to...
Main-path analysis and path-dependent transitions in HistCite™-based historiograms (2008)
Lucio-Arias, D., Leydesdorff, L.
With the program HistCite™ it is possible to generate and visualize the most relevant papers in a set of documents retrieved from the Science Citation Index. Historical reconstructions of...
International collaboration in science and the formation of a core group (2008)
International collaboration as measured by co-authorship relations on refereed papers grew linearly from 1990 to 2005 in terms of the number of papers, but exponentially in terms of the number of...
The journal set which provides a representation of nanoscience and nanotechnology at the interfaces among applied physics, chemistry, and the life sciences is developing rapidly because of the...
A tudásalapú gazdaság felemelkedésérõl, jellemzõirõl, a fogalom értelmezhetõségérõl az elmúlt években kiélezett viták folytak. A közgazdászkutatók egy része kétkedéssel fogadja...
The debate about which similarity measure one should use for the normalization in the case of Author Co-citation Analysis (ACA) is further complicated when one distinguishes between the symmetrical...
Patent classifications as indicators of intellectual organization (2008)
Using the 138,751 patents filed in 2006 under the Patent Cooperation Treaty, co-classification analysis is pursued on the basis of three- and four-digit codes in the International Patent...
Caveats for the use of citation indicators in research and journal evaluations (2008)
Aging of publications, percentage of self-citations, and impact vary from journal to journal within fields of science. The assumption that citation and publication practices are homogenous within...
Co-word analysis using the Chinese character set (2008)
Until recently, Chinese texts could not be studied using co-word analysis because the words are not separated by spaces in Chinese (and Japanese). A word can be composed of one or more characters....
Configurational information as potentially negative entropy: the triple helix model (2008)
Configurational information is generated when three or more sources of variance interact. The variations not only disturb each other relationally, but by selecting upon each other, they are also...
The dynamic analysis of structural change in the organization of the sciences requires, methodologically, the integration of multivariate and time-series analysis. Structural change - for instance,...
Purpose – This paper aims to provide a view and analysis of the immediate field of journals that surround a number of key heterodox economics journals. Design/methodology/approach – Using...
Leydesdorff, L., Schank, T., Scharnhorst, A., Nooy, W. De
The animation of network visualizations poses technical and theoretical challenges. Rather stable patterns are required before the mental map enables a user to make inferences over time. In order to...
In this paper we offer a way to measure the knowledge base of an economy in terms of probabilistic entropy. This measure, we hypothesize, is an indication of the extent to which a system, including...
Clustering methodologies for identifying country core competencies (2007)
Kostoff, RN, Del Rio, JA, Cortes, HD, Smith, C, Smith, A, Wagner, C, ...
The technical structure of the Mexican science and technology literature was determined. A representative database of technical articles was extracted from the Science Citation Index for the year...
The structure and infrastructure of Mexico's science and technology (2005)
Kostoff, RN, Del Rio, JA, Cortes, HD, Smith, C, Smith, A, Wagner, C, ...
The structure and infrastructure of the Mexican technical literature was determined. A representative database of technical articles was extracted from the Science Citation Index for the year 2002,...
The structure and infrastructure of Mexico's science and technology (2005)
Kostoff, R. N., Del Rio, J. A., Cortes, H. D., Smith, C., Smith, A., Wagner, C., ...
The structure and infrastructure of the Mexican technical literature was determined. A representative database of technical articles was extracted from the Science Citation Index for the year 2002,...
Co-words and citations relations between document sets and environments (1988)
Co-word linkages among documents have been proposed as an alternative to citations .(and co-citations) for the study of how documents are related. In this study we examine co-word linkages among a...
Co-words and citations relations between document sets and environments (1988)
Co-word linkages among documents have been proposed as an alternative to citations .(and co-citations) for the study of how documents are related. In this study we examine co-word linkages among a...
Een deurtje in de toren. Tien jaar Wetenschapswinkels (1987)
Weerdenburg, J., Pennings, F., Diepen, J. Van, Jacobs, H., Blomberg, C., ...
In het begin van de zeventiger jaren schoten de vrijwilligersprojecten van studenten en ex-studenten die hun kennis ten dienste wilden stellen van de maatschappij als paddestoelen uit de grond....
The structure and infrastructure of Mexico's science and technology
Kostoff, RN, Del Rio, JA, Cortes, HD, Smith, C, Smith, A, Wagner, C, ...
The structure and infrastructure of the Mexican technical literature was determined. A representative database of technical articles was extracted from the Science Citation Index for the year 2002,...
Dolfsma, W.A., Leydesdorff, L., Panne, G. Van Der
The interrelationships among technology, organization, and territory in an economic system have been considered as a 'holy trinity' from the perspective of regional development studies. The mutual...