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1.
Loet Leydesdorff 《Scientometrics》1993,28(3):233-235
András Schubert wins the 1993 Derek John de Solla Price award 相似文献
2.
L. Leydesdorff 《Scientometrics》1992,24(2):321-357
The theory of autopoiesis, i.e., self-referentiality in the operation of the system, provides us with a production rule for change in the structure of the network. Using information theory, a model system is developed to study the relative likelihood of dynamic transitions: various senses of irreversibility (emergence, and path dependency) are disinguished. A test for path dependency is applied to two sets of empirical data which supposedly reflect historical discontinuities: the budget of theFraunhofer Gesellschaft, and the citation network among AIDS research related journals. The model for the interaction between self-referential developments and goal-referential boundary conditions is further specified, using the example of technological trajectories and selection environments. 相似文献
3.
The development of frames of references 总被引:2,自引:1,他引:1
L. Leydesdorff 《Scientometrics》1986,9(3-4):103-125
Measurement of the effectiveness of science policies is analyzed as a multi-level problem. Journal-journal citations are discussed as a potential candidate for a domain beyond the control of policy-makers and authors or research groups and therefore may function as a relatively stable and easily accessible baseline for the calibration of outputs and outcomes of science policy. A method is developed, usingSCPsJCRs which is then applied to the two cases of water pollution and humanisation of labor. This method can also be used as a simple indicator for the development of journal-journal citation patterns over time. 相似文献
4.
A group of academic scientists and a group of industrial scientists in the field of solid state physics are compared with regard to their view of the physicist in general. In the same way two groups of students in different phases of their training are interviewed in order to get insight into social conflicts present in the educational system. Differences between the groups are found in the importance they attach to the social aspect of the research and in the degree to which they feel the physicist to be a normative concept. 相似文献
5.
Mutual information in three (or more) dimensions can be considered as a Triple-Helix indicator of possible synergy in university–industry–government relations. An open-source routine th4.exe makes the computation of this indicator interactively available at the internet, and thus applicable to large sets of data. Th4.exe computes all probabilistic entropies and mutual information in two, three, and, if available in the data, four dimensions among, for example, classes such as geographical addresses (cities, regions), technological codes (e.g. OECD’s NACE codes), and size categories; or, alternatively, among institutional addresses (academic, industrial, public sector) in document sets. The relations between the Triple-Helix indicator—as an indicator of synergy—and the Triple-Helix model that specifies the possibility of feedback by an overlay of communications, are also discussed. 相似文献
6.
Scientometrics - Using 3-year moving averages of the complete Journal Citation Reports 1994–2016 of the Science Citation Index and the Social Sciences Citation Index (combined), we analyze... 相似文献
7.
Scientometrics - The dilemma which remained unsolved using Rao-Stirling diversity, namely of how variety and balance can be combined into “dual concept diversity” (Stirling in SPRU... 相似文献
8.
The mutual information of university-industry-government relations: An indicator of the Triple Helix dynamics 总被引:4,自引:0,他引:4
University-industry-government relations provide a networked infrastructure for knowledge-based innovation systems. This infrastructure organizes the dynamic fluxes locally and the knowledge base remains emergent given these conditions. Whereas the relations between the institutions can be measured as variables, the interacting fluxes generate a probabilistic entropy. The mutual information among the three institutional dimensions provides us with an indicator of this entropy. When this indicator is negative, self-organization can be expected. The self-organizing dynamic may temporarily be stabilized in the overlay of communications among the carrying agencies. The various dynamics of Triple Helix relations at the global and national levels, in different databases, and in different regions of the world, are distinguished by applying this indicator to scientometric and webometric data. 相似文献
9.
10.
Seismology has several features that suggest it is a highly internationalized field: the subject matter is global, the tools
used to analyse seismic waves are dependent upon information technologies, and governments are interested in funding cooperative
research. We explore whether an emerging field like seismology has a more internationalised structure than the older, related
field of geophysics. Using aggregated journal-journal citations, we first show that, within the citing environment, seismology
emerged from within geophysics as its own field in the 1990s. The bibliographic analysis, however, does not show that seismology
is more internationalised than geophysics: in 2000, seismology had a lower percentage of all articles co-authored on an international
basis. Nevertheless, social network analysis shows that the core group of cooperating countries within seismology is proportionately
larger and more distributed than that within geophysics. While the latter exhibits an established network with a hierarchy,
the formation of a field in terms of new partnership relations is ongoing in seismology.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献