995 citations · 2.4k across the 265 of their papers we have counts for
41 papers · 1 filter
University-Industry-Government Relations in China: An emergent national system of innovations
Loet Leydesdorff, Zeng Guoping
Since 1992, a new Chinese innovation system has been emerging in terms of university-industry-government relations. In recent years, science parks, incubators, and high-tech develo…
What the Cited and Citing Environments Reveal of "Advances in Atmospheric Sciences"?
Shi Aolan, Loet Leydesdorff
The networking ability of journals reflects their academic influence among peer journals. This paper analyzes the cited and citing environments of the journal--Advances in Atmosphe…
Fractional counting of citations in research evaluation: An option for cross- and interdisciplinary assessments
Ping Zhou, Loet Leydesdorff
In the case of the scientometric evaluation of multi- or interdisciplinary units one risks to compare apples with oranges: each paper has to assessed in comparison to an appropriat…
"Structuration" by Intellectual Organization: The Configuration of Knowledge in Relations among Structural Components in Networks of Science
Loet Leydesdorff
Using aggregated journal-journal citation networks, the measurement of the knowledge base in empirical systems is factor-analyzed in two cases of interdisciplinary developments dur…
The Triple Helix, Quadruple Helix, . . ., and an N-tuple of Helices: Explanatory Models for Analyzing the Knowledge-based Economy?
Loet Leydesdorff
Using the Triple Helix model of university-industry-government relations, one can measure the extent to which innovation has become systemic instead of assuming the existence of na…
The semantic mapping of words and co-words in contexts
Loet Leydesdorff, Kasper Welbers
Meaning can be generated when information is related at a systemic level. Such a system can be an observer, but also a discourse, for example, operationalized as a set of documents…
"Meaning" as a sociological concept: A review of the modeling, mapping, and simulation of the communication of knowledge and meaning
Loet Leydesdorff
The development of discursive knowledge presumes the communication of meaning as analytically different from the communication of information. Knowledge can then be considered as a…
The Local Emergence and Global Diffusion of Research Technologies: An Exploration of Patterns of Network Formation
Loet Leydesdorff, Ismael Rafols
Grasping the fruits of "emerging technologies" is an objective of many government priority programs in a knowledge-based and globalizing economy. We use the publication records (in…
Remaining problems with the "New Crown Indicator" (MNCS) of the CWTS
Loet Leydesdorff, Tobias Opthof
In their article, entitled "Towards a new crown indicator: some theoretical considerations," Waltman et al. (2010; at arXiv:1003.2167) show that the "old crown indicator" of CWTS i…
How to evaluate universities in terms of their relative citation impacts: Fractional counting of citations and the normalization of differences among disciplines
Loet Leydesdorff, Jung C. Shin
Fractional counting of citations can improve on ranking of multi-disciplinary research units (such as universities) by normalizing the differences among fields of science in terms…
The Development of the Journal Environment of Leonardo
Alkim Almila Akdag Salah, Loet Leydesdorff
We present animations based on the aggregated journal-journal citations of Leonardo during the period 1974-2008. Leonardo is mainly cited by journals outside the arts domain for cu…
The Triple Helix Perspective of Innovation Systems
Loet Leydesdorff, Girma Zawdie
Alongside the neo-institutional model of networked relations among universities, industries, and governments, the Triple Helix can be provided with a neo-evolutionary interpretatio…
Communicative Competencies and the Structuration of Expectations: The creative tension between Habermas' critical theory and Luhmann's social systems theory
Loet Leydesdorff
I elaborate on the tension between Luhmann's social systems theory and Habermas' theory of communicative action, and argue that this tension can be resolved by focusing on language…
How fractional counting affects the Impact Factor: Normalization in terms of differences in citation potentials among fields of science
Loet Leydesdorff, Lutz Bornmann
The ISI-Impact Factors suffer from a number of drawbacks, among them the statistics-why should one use the mean and not the median?-and the incomparability among fields of science…
Normalization at the field level: fractional counting of citations
Loet Leydesdorff, Tobias Opthof
Van Raan et al. (2010; arXiv:1003.2113) have proposed a new indicator (MNCS) for field normalization. Since field normalization is also used in the Leiden Rankings of universities,…
Scopus' SNIP Indicator
Loet Leydesdorff, Tobias Opthof
Rejoinder to Moed [arXiv:1005.4906]: Our main objection is against developing new indicators which, like some of the older ones (for example, the "crown indicator" of CWTS), do not…
Eugene Garfield and Algorithmic Historiography: Co-Words, Co-Authors, and Journal Names
Loet Leydesdorff
Algorithmic historiography was proposed by Eugene Garfield in collaboration with Irving Sher in the 1960s, but further developed only recently into HistCite^{TM} with Alexander Pud…
The Production of Probabilistic Entropy in Structure/Action Contingency Relations
Loet Leydesdorff
Luhmann (1984) defined society as a communication system which is structurally coupled to, but not an aggregate of, human action systems. The communication system is then considere…
Scopus's Source Normalized Impact per Paper (SNIP) versus a Journal Impact Factor based on Fractional Counting of Citations
Loet Leydesdorff, Tobias Opthof
Impact factors (and similar measures such as the Scimago Journal Rankings) suffer from two problems: (i) citation behavior varies among fields of science and therefore leads to sys…
The Triple Helix Model and the Meta-Stabilization of Urban Technologies in Smart Cities
Loet Leydesdorff, Mark Deakin
The Triple Helix model of university-industry-government relations can be generalized from a neo-institutional model of networks to a neo-evolutionary model of how three selection…
The Non-linear Dynamics of Sociological Reflections
Loet Leydesdorff
Actors are embedded in networks of communication: the relations of the actors can be represented as the rows of a matrix, while the column vectors represent their communications. T…
The Evolution of Communication Systems
Loet Leydesdorff
One can study communications by using Shannon's (1948) mathematical theory of communication. In social communications, however, the channels are not "fixed", but themselves subject…
Uncertainty and the Communication of Time
Loet Leydesdorff
Prigogine and Stengers (1988) have pointed to the centrality of the concepts of "time and eternity" for the cosmology contained in Newtonian physics, but they have not addressed th…
Normalization, CWTS indicators, and the Leiden Rankings: Differences in citation behavior at the level of fields
Loet Leydesdorff, Tobias Opthof
Van Raan et al. (2010; arXiv:1003.2113) have proposed a new indicator (MNCS) for field normalization. Since field normalization is also used in the Leiden Rankings of universities,…