Loet Leydesdorff

ORCID: 0000-0002-7835-3098
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About
Contact & Profiles
Research Areas
  • scientometrics and bibliometrics research
  • University-Industry-Government Innovation Models
  • Innovation and Knowledge Management
  • Complex Network Analysis Techniques
  • Web visibility and informetrics
  • Regional Development and Policy
  • Economic and Technological Innovation
  • Complex Systems and Decision Making
  • Research Data Management Practices
  • Advanced Text Analysis Techniques
  • Biomedical Text Mining and Ontologies
  • Embodied and Extended Cognition
  • Data Visualization and Analytics
  • Innovation Diffusion and Forecasting
  • Complex Systems and Time Series Analysis
  • Innovation Policy and R&D
  • Information Systems Theories and Implementation
  • Meta-analysis and systematic reviews
  • Opinion Dynamics and Social Influence
  • Intellectual Capital and Performance Analysis
  • Business Strategy and Innovation
  • Scientific Computing and Data Management
  • Cognitive Science and Mapping
  • Intellectual Property and Patents
  • Academic Publishing and Open Access

University of Amsterdam
2014-2023

Birkbeck, University of London
2022

Amsterdam University of Applied Sciences
2003-2022

University College London
2022

Seoul National University
2022

Nanyang Technological University
2022

University of Kassel
2022

University of Arizona
2022

University of Hong Kong
2022

Bridge University
2022

At a workshop in Amsterdam January 1996, the Triple Helix of university-industry-government relations was discussed with focus on future university research emerging regime knowledge production and dissemination. The helices are hypothesized as selection mechanisms; distributed events can then be considered outcomes interactions between these underlying dynamics. A is suggested communicative reflexive mechanisms thus extending analytical framework, so that study infrastructure society...

10.1093/spp/23.5.279 article EN Science and Public Policy 1996-10-01

The Second Conference on the Triple Helix of University-Industry-Government Relations focused “the future location research.” In this report, thesis is developed into a recursive model how an overlay communications operates underlying institutions. Market selections, innovative dynamics, and network controls provide different codes communication at global level. Local translations interfaces induce adaptation mechanisms in institutional arrangements. While two dynamics tend to coevolve...

10.1093/spp/25.3.195 article EN Science and Public Policy 1998-06-01

Using the Triple Helix model of university–industry–government relations, one can measure extent to which innovation has become systemic instead assuming existence national (or regional) systems innovations on a priori grounds. Systemness patterns, however, be expected remain in transition because integrating and differentiating forces. Integration among functions wealth creation, knowledge production, normative control takes place at interfaces organizations, while exchanges market,...

10.1007/s13132-011-0049-4 article EN cc-by-nc Journal of the Knowledge Economy 2011-06-17

Abstract In addition to science citation indicators of journals like impact and immediacy, social network analysis provides a set centrality measures degree, betweenness, closeness centrality. These are first analyzed for the entire 7,379 included in Journal Citation Reports Science Index Social Sciences 2004 (Thomson ISI, Philadelphia, PA), then also relation local environments that can be considered as proxies specialties disciplines. Betweenness is shown an indicator interdisciplinarity...

10.1002/asi.20614 article EN Journal of the American Society for Information Science and Technology 2007-05-18

Portfolio analysis of the publication profile a unit interest, ranging from individuals and organizations to scientific field or interdisciplinary programs, aims inform analysts decision makers about position unit, where it has been, may go in complex adaptive environment. A portfolio aim identify gap between current an organization goal that intends achieve competencies multiple institutions. We introduce new visual analytic method for analyzing, comparing, contrasting characteristics...

10.1002/asi.22968 article EN Journal of the Association for Information Science and Technology 2013-11-01

Abstract The decomposition of scientific literature into disciplinary and subdisciplinary structures is one the core goals scientometrics. How can we achieve a good decomposition? ISI subject categories classify journals included in Science Citation Index (SCI). aggregated journal‐journal citation matrix contained Journal Reports be on basis these categories. This leads to an asymmetrical (citing versus cited) that much more densely populated than underlying at journal level. Exploratory...

10.1002/asi.20967 article EN Journal of the American Society for Information Science and Technology 2008-10-03

10.1016/s0048-7333(99)00063-3 article EN Research Policy 2000-02-01

Abstract We present a novel approach to visually locate bodies of research within the sciences, both at each moment time and dynamically. This article describes how this fits with other efforts locally globally map scientific outputs. then show these science overlay maps help benchmarking, explore collaborations, track temporal changes, using examples universities, corporations, funding agencies, topics. address their conditions application discuss advantages, downsides, limitations. Overlay...

10.1002/asi.21368 article EN Journal of the American Society for Information Science and Technology 2010-05-27

Abstract This paper sets out to demonstrate how the triple-helix model enables us study knowledge base of an urban economy in terms its civil society's support for evolution city as a key component innovation system. It argues that cities can be considered densities networks among three relevant dynamics: intellectual capital universities, wealth creation industries, and democratic government society. goes on suggest these interactions generate dynamic spaces within where exploited bootstrap...

10.1080/10630732.2011.601111 article EN Journal of Urban Technology 2011-04-01

Abstract Co‐occurrence matrices, such as cocitation, coword, and colink have been used widely in the information sciences. However, confusion controversy hindered proper statistical analysis of these data. The underlying problem, our opinion, involved understanding nature various types matrices. This article discusses difference between a symmetrical cocitation matrix an asymmetrical citation well appropriate techniques that can be applied to each respectively. Similarity measures (such...

10.1002/asi.20335 article EN Journal of the American Society for Information Science and Technology 2006-08-17

Global collaboration continues to grow as a share of all scientific cooperation, measured coauthorships peer-reviewed, published papers. The percent papers that are internationally coauthored has more than doubled in 20 years, and they account for the growth output among scientifically advanced countries. Emerging countries, particularly China, have increased their participation global science, part by doubling spending on R&D; increasingly likely appear partners Given connections at...

10.1371/journal.pone.0131816 article EN cc-by PLoS ONE 2015-07-21
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