Loet Leydesdorff

Loet Leydesdorff, Ping Zhou, Lutz Bornmann: How can journal impact factors be normalized across fields of science? An assessment in terms of percentile ranks and fractional counts. JASIST 64(1): 96-107 (2013)

Loet Leydesdorff, Tobias Opthof: Citation analysis with medical subject Headings (MeSH) using the Web of Knowledge: A new routine. JASIST 64(5): 1076-1080 (2013)

Lutz Bornmann, Loet Leydesdorff: Statistical tests and research assessments: A comment on Schneider (2012). JASIST 64(6): 1306-1308 (2013)

Lutz Bornmann, Loet Leydesdorff, Rüdiger Mutz: The use of percentiles and percentile rank classes in the analysis of bibliometric data: Opportunities and limits. J. Informetrics 7(1): 158-165 (2013)

Erjia Yan, Ying Ding, Blaise Cronin, Loet Leydesdorff: A bird's-eye view of scientific trading: Dependency relations among fields of science. J. Informetrics 7(2): 249-264 (2013)

Lutz Bornmann, Loet Leydesdorff: The validation of (advanced) bibliometric indicators through peer assessments: A comparative study using data from InCites and F1000. J. Informetrics 7(2): 286-291 (2013)

Loet Leydesdorff: Does the specification of uncertainty hurt the progress of scientometrics? J. Informetrics 7(2): 292-293 (2013)

Loet Leydesdorff: An evaluation of impacts in "Nanoscience & nanotechnology": steps towards standards for citation analysis. Scientometrics 94(1): 35-55 (2013)

Loet Leydesdorff, Stephen Carley, Ismael Rafols: Global maps of science based on the new Web-of-Science categories. Scientometrics 94(2): 589-593 (2013)

Stasa Milojevic, Loet Leydesdorff: Information metrics (iMetrics): a research specialty with a socio-cognitive identity? Scientometrics 95(1): 141-157 (2013)

Loet Leydesdorff, Caroline S. Wagner, Han Woo Park, Jonathan Adams: International Collaboration in Science: The Global Map and the Network. CoRR abs/1301.0801 (2013)

Loet Leydesdorff, Ismael Rafols, Chaomei Chen: Interactive Overlays of Journals and the Measurement of Interdisciplinarity on the basis of Aggregated Journal-Journal Citations. CoRR abs/1301.1013 (2013)

Balázs Lengyel, Tamás Sebestyén, Loet Leydesdorff: USPTO Patent Maps in Central Europe: Can "Cathedrals" be Built on the Ruins of Socialism? CoRR abs/1301.1757 (2013)

Jonathan Adams, Karen Gurney, Daniel Hook, Loet Leydesdorff: International collaboration clusters in Africa. CoRR abs/1301.5159 (2013)

Loet Leydesdorff, Inga A. Ivanova: Mutual Redundancies in Inter-human Communication Systems: Steps Towards a Calculus of Processing Meaning. CoRR abs/1301.6849 (2013)

Loet Leydesdorff, Martin Meyer: Technology Transfer and the End of the Bayh-Dole Effect: Patents as an Analytical Lens on University-Industry-Government Relations. CoRR abs/1302.4864 (2013)

Susanne E. Baumgartner, Loet Leydesdorff: Group-Based Trajectory Modeling of Citations in Scholarly Literature: Dynamic Qualities of "Transient" and "Sticky Knowledge Claims". CoRR abs/1303.4366 (2013)

Daniele Rotolo, Ismael Rafols, Michael Hopkins, Loet Leydesdorff: Mapping the De Facto Governance of Emerging Science and Technologies. CoRR abs/1303.4672 (2013)

Robert D. Shelton, Loet Leydesdorff: Publish or patent: Bibliometric evidence for empirical trade-offs in national funding strategies. JASIST 63(3): 498-511 (2012)

Loet Leydesdorff, Lutz Bornmann: Mapping (USPTO) patent data using overlays to Google Maps. JASIST 63(7): 1442-1458 (2012)

Loet Leydesdorff, Lutz Bornmann: Percentile ranks and the integrated impact indicator (I3). JASIST 63(9): 1901-1902 (2012)

Loet Leydesdorff, Daniele Rotolo, Ismael Rafols: Bibliometric perspectives on medical innovation using the medical subject Headings of PubMed. JASIST 63(11): 2239-2253 (2012)

Loet Leydesdorff: Accounting for the uncertainty in the evaluation of percentile ranks. JASIST 63(11): 2349-2350 (2012)

Loet Leydesdorff, Ismael Rafols: Interactive overlays: A new method for generating global journal maps from Web-of-Science data. J. Informetrics 6(2): 318-332 (2012)

Lutz Bornmann, Félix de Moya Anegón, Loet Leydesdorff: The new Excellence Indicator in the World Report of the SCImago Institutions Rankings 2011. J. Informetrics 6(2): 333-335 (2012)

Lutz Bornmann, Loet Leydesdorff: Which are the best performing regions in information science in terms of highly cited papers? Some improvements of our previous mapping approaches. J. Informetrics 6(2): 336-345 (2012)

Alireza Abbasi, Liaquat Hossain, Loet Leydesdorff: Betweenness centrality as a driver of preferential attachment in the evolution of research collaboration networks. J. Informetrics 6(3): 403-412 (2012)

Loet Leydesdorff: McCall's area transformation versus the integrated impact indicator (I3). J. Informetrics 6(4): 513-514 (2012)

Ki-Seok Kwon, Han Woo Park, Minho So, Loet Leydesdorff: Has globalization strengthened South Korea's national research system? National and international dynamics of the Triple Helix of scientific co-authorship relationships in South Korea. Scientometrics 90(1): 163-176 (2012)

Loet Leydesdorff, Tobias Opthof: A rejoinder on energy versus impact indicators. Scientometrics 90(2): 745-748 (2012)

Loet Leydesdorff: Alternatives to the journal impact factor: I3 and the top-10% (or top-25%?) of the most-highly cited papers. Scientometrics 92(2): 355-365 (2012)

Loet Leydesdorff, Lutz Bornmann: Testing differences statistically with the Leiden ranking. Scientometrics 92(3): 781-783 (2012)

Gaston Heimeriks, Loet Leydesdorff: Emerging search regimes: measuring co-evolutions among research, science, and society. Techn. Analysis & Strat. Manag. 24(1): 51-67 (2012)

Loet Leydesdorff: The Knowledge-Based Economy and the Triple Helix Model. CoRR abs/1201.4553 (2012)

Loet Leydesdorff: Alternatives to the Journal Impact Factor: I3 and the Top-10% (or Top-25%?) of the Most-Highly Cited Papers. CoRR abs/1201.4638 (2012)

Loet Leydesdorff, Stephen Carley, Ismael Rafols: Global Maps of Science based on the new Web-of-Science Categories. CoRR abs/1202.1914 (2012)

Loet Leydesdorff: McCall's Area Transformation versus the Integrated Impact Indicator (I3). CoRR abs/1202.4133 (2012)

Loet Leydesdorff, Daniele Rotolo, Wouter de Nooy: Innovation as a Nonlinear . CoRR abs/1202.6235 (2012)

Loet Leydesdorff, Daniele Rotolo, Ismael Rafols: Bibliometric Perspectives on Medical Innovation using the Medical Subject Headings (MeSH) of PubMed. CoRR abs/1203.1006 (2012)

Loet Leydesdorff, Tobias Opthof: Citation Analysis using the . CoRR abs/1203.4725 (2012)

Loet Leydesdorff: Accounting for the Uncertainty in the Evaluation of Percentile Ranks. CoRR abs/1204.1894 (2012)

Loet Leydesdorff, Ulrike Felt: Edited Volumes, Monographs, and . CoRR abs/1204.3717 (2012)

Loet Leydesdorff, Ping Zhou, Lutz Bornmann: How Can Journal Impact Factors be. CoRR abs/1205.0668 (2012)

Lutz Bornmann, Loet Leydesdorff: Citation impact of papers published from six prolific countries: A national comparison based on InCites data. CoRR abs/1205.0680 (2012)

Caroline S. Wagner, Loet Leydesdorff: An Integrated Impact Indicator (I3): A New Definition of "Impact" with Policy Relevance. CoRR abs/1205.1419 (2012)

Loet Leydesdorff: Advances in Science Visualization: Social Networks, Semantic Maps, and Discursive Knowledge. CoRR abs/1206.3746 (2012)

Loet Leydesdorff: Statistics for the Dynamic Analysis of Scientometric Data: The evolution of the sciences in terms of trajectories and regimes. CoRR abs/1206.3747 (2012)

Loet Leydesdorff, Stasa Milojevic: Scientometrics. CoRR abs/1208.4566 (2012)

Fred Y. Ye, Susan S. Yu, Loet Leydesdorff: The Triple Helix of . CoRR abs/1209.1260 (2012)

Stasa Milojevic, Loet Leydesdorff: Information Metrics (iMetrics): A Research Specialty with a Socio-Cognitive Identity? CoRR abs/1209.3406 (2012)

Loet Leydesdorff, Øivind Strand: The Swedish System of Innovation: Regional Synergies in a Knowledge-Based Economy. CoRR abs/1210.4396 (2012)

Loet Leydesdorff, Duncan Kushnir, Ismael Rafols: Interactive Overlay Maps for US Patent (USPTO) Data Based on International Patent Classifications (IPC). CoRR abs/1210.6456 (2012)

Lutz Bornmann, Loet Leydesdorff, Rüdiger Mutz: The use of percentiles and percentile rank classes in the analysis of bibliometric data: Opportunities and limits. CoRR abs/1211.0381 (2012)

Lutz Bornmann, Loet Leydesdorff: The validation of (advanced) bibliometric indicators through peer assessments: A comparative study using data from InCites and F1000. CoRR abs/1211.1154 (2012)

Loet Leydesdorff, Filippo Radicchi, Lutz Bornmann, Claudio Castellano, Wouter de Nooy: Field-normalized Impact Factors: A Comparison of Rescaling versus Fractionally Counted IFs. CoRR abs/1211.2571 (2012)

Inga A. Ivanova, Loet Leydesdorff: Rotational Symmetry and the Transformation of Innovation Systems in a Triple Helix of University-Industry-Government Relations. CoRR abs/1211.2573 (2012)

Erjia Yan, Ying Ding, Blaise Cronin, Loet Leydesdorff: A bird's-eye view of scientific trading: Dependency relations among fields of science. CoRR abs/1211.5820 (2012)

Loet Leydesdorff, Robert L. Goldstone: Interdisciplinarity at the Journal and Specialty Level: The changing knowledge bases of the journal Cognitive Science. CoRR abs/1212.0823 (2012)

John Mingers, Loet Leydesdorff: Identifying Research Fields within Business and Management: A Journal Cross-Citation Analysis. CoRR abs/1212.6773 (2012)

Loet Leydesdorff, Tobias Opthof: Scopus' SNIP indicator: Reply to Moed. JASIST 62(1): 214-215 (2011)

Loet Leydesdorff, Lutz Bornmann: How fractional counting of citations affects the impact factor: Normalization in terms of differences in citation potentials among fields of science. JASIST 62(2): 217-229 (2011)

Loet Leydesdorff, Ismael Rafols: Local emergence and global diffusion of research technologies: An exploration of patterns of network formation. JASIST 62(5): 846-860 (2011)

Loet Leydesdorff, Jung C. Shin: How to evaluate universities in terms of their relative citation impacts: Fractional counting of citations and the normalization of differences among disciplines. JASIST 62(6): 1146-1155 (2011)

Loet Leydesdorff, Lutz Bornmann, Rüdiger Mutz, Tobias Opthof: Turning the tables on citation analysis one more time: Principles for comparing sets of documents. JASIST 62(7): 1370-1381 (2011)

Lutz Bornmann, Loet Leydesdorff: Which cities produce more excellent papers than can be expected? A new mapping approach, using Google Maps, based on statistical significance testing. JASIST 62(10): 1954-1962 (2011)

Loet Leydesdorff, Lutz Bornmann: Integrated impact indicators compared with impact factors: An alternative research design with policy implications. JASIST 62(11): 2133-2146 (2011)

Loet Leydesdorff, Björn Hammarfelt, Alkim Almila Akdag Salah: The structure of the Arts & Humanities Citation Index: A mapping on the basis of aggregated citations among 1, 157 journals. JASIST 62(12): 2414-2426 (2011)

Loet Leydesdorff, Ismael Rafols: Indicators of the interdisciplinarity of journals: Diversity, centrality, and citations. J. Informetrics 5(1): 87-100 (2011)

Loet Leydesdorff, Tobias Opthof: Remaining problems with the "New Crown Indicator" (MNCS) of the CWTS. J. Informetrics 5(1): 224-225 (2011)

Ping Zhou, Loet Leydesdorff: Fractional counting of citations in research evaluation: A cross- and interdisciplinary assessment of the Tsinghua University in Beijing. J. Informetrics 5(3): 360-368 (2011)

Loet Leydesdorff, Kasper Welbers: The semantic mapping of words and co-words in contexts. J. Informetrics 5(3): 469-475 (2011)

Lutz Bornmann, Loet Leydesdorff, Christiane Walch-Solimena, Christoph Ettl: Mapping excellence in the geography of science: An approach based on Scopus data. J. Informetrics 5(4): 537-546 (2011)

Loet Leydesdorff: "Structuration" by intellectual organization: the configuration of knowledge in relations among structural components in networks of science. Scientometrics 88(2): 499-520 (2011)

Loet Leydesdorff: Katy Börner: Atlas of science: visualizing what we know - The MIT Press, Cambridge, MA/London, UK, 2010, US$20. Scientometrics 88(2): 675-677 (2011)

Tobias Opthof, Loet Leydesdorff: A comment to the paper by Waltman et al., Scientometrics, 87, 467-481, 2011. Scientometrics 88(3): 1011-1016 (2011)

Gaston Heimeriks, Loet Leydesdorff: Emerging Search Regimes: Measuring Co-evolutions among Research, Science, and Society. CoRR abs/1101.2591 (2011)

Loet Leydesdorff, Lutz Bornmann, Rüdiger Mutz, Tobias Opthof: Normalizing the measurement of citation performance: Principles for comparing sets of documents. CoRR abs/1101.3863 (2011)

Ping Zhou, Loet Leydesdorff: Fractional counting of citations in research evaluation: A cross- and interdisciplinary assessment of the Tsinghua University in Beijing. CoRR abs/1101.4750 (2011)

Loet Leydesdorff, Björn Hammarfelt, Alkim Almila Akdag Salah: The structure of the Arts & Humanities Citation Index: A mapping on the basis of aggregated citations among 1,157 journals. CoRR abs/1102.1934 (2011)

Ronald Rousseau, Loet Leydesdorff: Non-consistency, non-cited items, and the impact factor: A consequence of the arithmetic. CoRR abs/1102.2567 (2011)

Tobias Opthof, Loet Leydesdorff: Citation analysis cannot legitimate the strategic selection of excellence. CoRR abs/1102.2569 (2011)

Robert D. Shelton, Loet Leydesdorff: Publish or Patent: Bibliometric evidence for empirical trade-offs in national funding strategies. CoRR abs/1102.3047 (2011)

Lutz Bornmann, Loet Leydesdorff: Which cities produce excellent papers worldwide more than can be expected? A new mapping approach--using Google Maps--based on statistical significance testing. CoRR abs/1103.3216 (2011)

Loet Leydesdorff, Lutz Bornmann: Integrated Impact Indicators (I3) compared with Impact Factors (IFs): An alternative research design with policy implications. CoRR abs/1103.5241 (2011)

Ismael Rafols, Loet Leydesdorff, Alice O'Hare, Paul Nightingale, Andy Stirling: How journal rankings can suppress interdisciplinarity. The case of innovation studies in business and management. CoRR abs/1105.1227 (2011)

Loet Leydesdorff, Ismael Rafols: Interactive Overlays: A New Method for Generating Global Journal Maps from Web-of-Science Data. CoRR abs/1105.2925 (2011)

Loet Leydesdorff: Book review: Katy Börner, Atlas of Science: Visualizing What We Know. Cambridge, MA/ London UK: The MIT Press, 2010. CoRR abs/1105.3469 (2011)

Lutz Bornmann, Loet Leydesdorff, Christiane Walch-Solimena, Christoph Ettl: Mapping excellence in the geography of science: An approach based on Scopus data. CoRR abs/1105.4736 (2011)

Loet Leydesdorff: Hyperincursive Cogitata and Incursive Cogitantes: Scholarly Discourse as a Strongly Anticipatory System. CoRR abs/1106.5651 (2011)

Loet Leydesdorff, Tobias Opthof: A Rejoinder on Energy versus Impact Indicators. CoRR abs/1108.5845 (2011)

Lutz Bornmann, Loet Leydesdorff: Which cities' paper output and . CoRR abs/1109.1173 (2011)

Loet Leydesdorff: An Evaluation of Impacts in "Nanoscience & nanotechnology:" Steps towards standards for citation analysis. CoRR abs/1109.2306 (2011)

Loet Leydesdorff: World Shares of Publications of . CoRR abs/1110.1802 (2011)

Lutz Bornmann, Félix de Moya Anegón, Loet Leydesdorff: The new Excellence Indicator in the World Report of the SCImago Institutions Rankings 2011. CoRR abs/1110.2305 (2011)

Loet Leydesdorff, Lutz Bornmann: Mapping (USPTO) Patent Data using Overlays to Google Maps. CoRR abs/1110.5712 (2011)

Michelina Venditti, Emanuela Reale, Loet Leydesdorff: The Disclosure of University Research for Societal Demand: A Non-Market Perspective on the "Third Mission". CoRR abs/1111.5684 (2011)

Alireza Abbasi, Liaquat Hossain, Loet Leydesdorff: Betweenness Centrality as a Driver of Preferential Attachment in the Evolution of Research Collaboration Networks. CoRR abs/1111.6804 (2011)

Loet Leydesdorff, Lutz Bornmann: Testing Differences Statistically with the Leiden Ranking. CoRR abs/1112.4037 (2011)

Loet Leydesdorff, Lutz Bornmann: Percentile Ranks and the Integrated Impact Indicator (I3). CoRR abs/1112.6281 (2011)

Esther Vlieger, Loet Leydesdorff: Visualization and Analysis of Frames in Collections of Messages: Content Analysis and the Measurement of Meaning. CoRR abs/1112.6286 (2011)

Loet Leydesdorff: The knowledge-based economy and the triple helix model. ARIST 44(1): 365-417 (2010)

Loet Leydesdorff: Redundancy in Systems Which Entertain a Model of Themselves: Interaction Information and the Self-Organization of Anticipation. Entropy 12(1): 63-79 (2010)

Loet Leydesdorff, Félix de Moya Anegón, Vicente P. Guerrero Bote: Journal maps on the basis of Scopus data: A comparison with the Journal Citation Reports of the ISI. JASIST 61(2): 352-369 (2010)

Loet Leydesdorff, Alkim Almila Akdag Salah: Maps on the basis of the Arts & Humanities Citation Index: The journals Leonardo and Art Journal versus "digital humanities" as a topic. JASIST 61(4): 787-801 (2010)

Ping Zhou, Xinning Su, Loet Leydesdorff: A comparative study on communication structures of Chinese journals in the social sciences. JASIST 61(7): 1360-1376 (2010)

Loet Leydesdorff, Olle Persson: Mapping the geography of science: Distribution patterns and networks of relations among cities and institutes. JASIST 61(8): 1622-1634 (2010)

Ismael Rafols, Alan L. Porter, Loet Leydesdorff: Science overlay maps: A new tool for research policy and library management. JASIST 61(9): 1871-1887 (2010)

Loet Leydesdorff: The communication of meaning and the structuration of expectations: Giddens' "structuration theory" and Luhmann's "self-organization". JASIST 61(10): 2138-2150 (2010)

Loet Leydesdorff, Tobias Opthof: Scopus's source normalized impact per paper (SNIP) versus a journal impact factor based on fractional counting of citations. JASIST 61(11): 2365-2369 (2010)

Lutz Bornmann, Loet Leydesdorff, Peter Van den Besselaar: A meta-evaluation of scientific research proposals: Different ways of comparing rejected to awarded applications. J. Informetrics 4(3): 211-220 (2010)

Tobias Opthof, Loet Leydesdorff: Caveats for the journal and field normalizations in the CWTS ("Leiden") evaluations of research performance. J. Informetrics 4(3): 423-430 (2010)

Loet Leydesdorff, Tobias Opthof: Normalization at the field level: Fractional counting of citations. J. Informetrics 4(4): 644-646 (2010)

Loet Leydesdorff, Martin Meyer: The decline of university patenting and the end of the Bayh-Dole effect. Scientometrics 83(2): 355-362 (2010)

Loet Leydesdorff, Girma Zawdie: The triple helix perspective of innovation systems. Techn. Analysis & Strat. Manag. 22(7): 789-804 (2010)

Loet Leydesdorff: Redundancy in Systems which Entertain a Model of Themselves: Interaction Information and the Self-organization of Anticipation. CoRR abs/1001.1143 (2010)

Loet Leydesdorff: Knowledge-Based Innovation Systems and the Model of a Triple Helix of University-Industry-Government Relations. CoRR abs/1001.1308 (2010)

Yuko Fujigaki, Loet Leydesdorff: Quality Control and Validation Boundaries in a Triple Helix of University-Industry-Government: 'Mode 2' and the Future of University Research. CoRR abs/1001.1315 (2010)

Gaston Heimeriks, Loet Leydesdorff, Peter Van den Besselaar: Distributed scientific communication in the European information society: Some cases of "Mode 2" fields of research. CoRR abs/1001.1320 (2010)

Iina Hellsten, James Dawson, Loet Leydesdorff: Implicit media frames: Automated analysis of public debate on artificial sweeteners. CoRR abs/1001.4368 (2010)

Loet Leydesdorff, Peter Van den Besselaar: Scientometrics and Communication Theory: Towards Theoretically Informed Indicators. CoRR abs/1001.4433 (2010)

Loet Leydesdorff, Olle Persson: Mapping the Geography of Science: Distribution Patterns and Networks of Relations among Cities and Institutes. CoRR abs/1001.5016 (2010)

Wilfred Dolfsma, Loet Leydesdorff: The Citation Field of Evolutionary Economics. CoRR abs/1001.5018 (2010)

Loet Leydesdorff: What Can Heterogeneity Add to the Scientometric Map? Steps towards algorithmic historiography. CoRR abs/1002.0532 (2010)

Tobias Opthof, Loet Leydesdorff: Caveats for the journal and field normalizations in the CWTS ("Leiden") evaluations of research performance. CoRR abs/1002.2769 (2010)

Loet Leydesdorff, Ismael Rafols: Indicators of the Interdisciplinarity of Journals: Diversity, Centrality, and Citations. CoRR abs/1003.3613 (2010)

Loet Leydesdorff, Tobias Opthof: Scopus's Source Normalized Impact per Paper (SNIP) versus a Journal Impact Factor based on Fractional Counting of Citations. CoRR abs/1004.3580 (2010)

Loet Leydesdorff: The Production of Probabilistic Entropy in Structure/Action Contingency Relations. CoRR abs/1005.0707 (2010)

Loet Leydesdorff: Eugene Garfield and Algorithmic Historiography: Co-Words, Co-Authors, and Journal Names. CoRR abs/1005.5444 (2010)

Loet Leydesdorff, Tobias Opthof: Scopus' SNIP Indicator. CoRR abs/1006.2895 (2010)

Loet Leydesdorff, Tobias Opthof: Normalization at the field level: fractional counting of citations. CoRR abs/1006.2896 (2010)

Loet Leydesdorff, Lutz Bornmann: How fractional counting affects the Impact Factor: Steps towards field-independent classifications of scholarly journals and literature. CoRR abs/1007.4749 (2010)

Alkim Almila Akdag Salah, Loet Leydesdorff: The Development of the Journal Environment of Leonardo. CoRR abs/1009.1466 (2010)

Loet Leydesdorff, Tobias Opthof: Remaining problems with the "New Crown Indicator" (MNCS) of the CWTS. CoRR abs/1010.2379 (2010)

Loet Leydesdorff, Jung C. Shin: How to evaluate universities in terms of their relative citation impacts: Fractional counting of citations and the normalization of differences among disciplines. CoRR abs/1010.2465 (2010)

Loet Leydesdorff, Ismael Rafols: How Do Emerging Technologies Conquer the World? An Exploration of Patterns of Diffusion and Network Formation. CoRR abs/1011.3120 (2010)

Loet Leydesdorff: "Meaning" as a sociological concept: A review of the modeling, mapping, and simulation of the communication of knowledge and meaning. CoRR abs/1011.3244 (2010)

Loet Leydesdorff, Kasper Welbers: The semantic mapping of words and co-words in contexts. CoRR abs/1011.5209 (2010)

Ping Zhou, Loet Leydesdorff: Fractional counting of citations in research evaluation: An option for cross- and interdisciplinary assessments. CoRR abs/1012.0359 (2010)

Shi Aolan, Loet Leydesdorff: What the Cited and Citing Environments Reveal of "Advances in Atmospheric Sciences"? CoRR abs/1012.1939 (2010)

Loet Leydesdorff: "Structuration" by Intellectual Organization: The Configuration of Knowledge in Relations among Structural Components in Networks of Science. CoRR abs/1012.5735 (2010)

Loet Leydesdorff, Ismael Rafols: A global map of science based on the ISI subject categories. JASIST 60(2): 348-362 (2009)

Loet Leydesdorff, Yuan Sun: National and international dimensions of the Triple Helix in Japan: University-industry-government versus international coauthorship relations. JASIST 60(4): 778-788 (2009)

Leo Egghe, Loet Leydesdorff: The relation between Pearson's correlation coefficient r and Salton's cosine measure. JASIST 60(5): 1027-1036 (2009)

Stephen J. Bensman, Loet Leydesdorff: Definition and identification of journals as bibliographic and subject entities: Librarianship versus ISI Journal Citation Reports methods and their effect on citation measures. JASIST 60(6): 1097-1117 (2009)

Loet Leydesdorff: How are new citation-based journal indicators adding to the bibliometric toolbox? JASIST 60(7): 1327-1336 (2009)

Loet Leydesdorff, Carole Probst: The delineation of an interdisciplinary specialty in terms of a journal set: The case of communication studies. JASIST 60(8): 1709-1718 (2009)

Ismael Rafols, Loet Leydesdorff: Content-based and algorithmic classifications of journals: Perspectives on the dynamics of scientific communication and indexer effects. JASIST 60(9): 1823-1835 (2009)

Diana Lucio-Arias, Loet Leydesdorff: An indicator of research front activity: Measuring intellectual organization as uncertainty reduction in document sets. JASIST 60(12): 2488-2498 (2009)

Diana Lucio-Arias, Loet Leydesdorff: The dynamics of exchanges and references among scientific texts, and the autopoiesis of discursive knowledge. J. Informetrics 3(3): 261-271 (2009)

Loet Leydesdorff, Caroline S. Wagner: Macro-level indicators of the relations between research funding and research output. J. Informetrics 3(4): 353-362 (2009)

Loet Leydesdorff, Caroline S. Wagner: Is the United States losing ground in science? A global perspective on the world science system. Scientometrics 78(1): 23-36 (2009)

Han Woo Park, Loet Leydesdorff: Knowledge linkage structures in communication studies using citation analysis among communication journals. Scientometrics 81(1): 157-175 (2009)

Loet Leydesdorff: How are new citation-based journal indicators adding to the bibliometric toolbox? CoRR abs/0909.4457 (2009)

Ricardo Arencibia Jorge, Loet Leydesdorff, Zaida Chinchilla-Rodríguez, Ronald Rousseau, Soren W. Paris: Retrieval of very large numbers of items in the Web of Science: an exercise to develop accurate search strategies. CoRR abs/0911.1305 (2009)

Diana Lucio-Arias, Loet Leydesdorff: The Dynamics of Exchanges and References among Scientific Texts, and the Autopoiesis of Discursive Knowledge. CoRR abs/0911.1308 (2009)

Leo Egghe, Loet Leydesdorff: The relation between Pearson's correlation coefficient r and Salton's cosine measure. CoRR abs/0911.1318 (2009)

Han Park, Loet Leydesdorff: Knowledge linkage structures in communication studies using citation analysis among communication journals. CoRR abs/0911.1320 (2009)

Loet Leydesdorff: Caveats for the Use of Citation Indicators in Research and Journal Evaluations. CoRR abs/0911.1440 (2009)

Loet Leydesdorff: The delineation of nanoscience and nanotechnology in terms of journals and patents: a most recent update. CoRR abs/0911.1445 (2009)

Loet Leydesdorff: On the Normalization and Visualization of Author Co-Citation Data Salton's Cosine versus the Jaccard Index. CoRR abs/0911.1447 (2009)

Loet Leydesdorff, Ping Zhou: Co-word Analysis using the Chinese Character Set. CoRR abs/0911.1451 (2009)

Diana Lucio-Arias, Loet Leydesdorff: Main-path analysis and path-dependent transitions in HistCite(TM)-based historiograms. CoRR abs/0911.1454 (2009)

Han Woo Park, Loet Leydesdorff: Korean journals in the Science Citation Index: What do they reveal about the intellectual structure of S&T in Korea? CoRR abs/0911.1456 (2009)

Wilfred Dolfsma, Loet Leydesdorff: Journals as constituents of scientific discourse: economic heterodoxy. CoRR abs/0911.2364 (2009)

Loet Leydesdorff: Visualization of the Citation Impact Environments of Scientific Journals: An online mapping exercise. CoRR abs/0911.2731 (2009)

Lutz Bornmann, Loet Leydesdorff, Werner Marx: Citation Environment of Angewandte Chemie. CoRR abs/0911.3086 (2009)

Ping Zhou, Loet Leydesdorff: A Comparison between the China Scientific and Technical Papers and Citations Database and the Science Citation Index in terms of journal hierarchies and inter-journal citation relations. CoRR abs/0911.3087 (2009)

Ping Zhou, Loet Leydesdorff: The Citation Impacts and Citation Environments of Chinese Journals in Mathematics. CoRR abs/0911.3091 (2009)

Loet Leydesdorff: Indicators of Structural Change in the Dynamics of Science: Entropy Statistics of the SCI Journal Citation Reports. CoRR abs/0911.3093 (2009)

Loet Leydesdorff: Environment and Planning B as a Journal: The interdisciplinarity of its environment and the citation impact. CoRR abs/0911.3095 (2009)

Loet Leydesdorff, Iina Hellsten: Measuring the Meaning of Words in Contexts: An automated analysis of controversies about Monarch butterflies, Frankenfoods, and stem cells. CoRR abs/0911.3411 (2009)

Loet Leydesdorff: Can Scientific Journals be Classified in terms of Aggregated Journal-Journal Citation Relations using the Journal Citation Reports? CoRR abs/0911.3415 (2009)

Loet Leydesdorff, Stephen J. Bensman: Classification and Powerlaws: The Logarithmic Transformation. CoRR abs/0911.3416 (2009)

Loet Leydesdorff, Liwen Qiu Vaughan: Co-occurrence Matrices and their Applications in Information Science: Extending ACA to the Web Environment. CoRR abs/0911.3422 (2009)

Lutz Bornmann, Loet Leydesdorff, Peter Van den Besselaar: A Meta-evaluation of Scientific Research Proposals: Different Ways of Comparing Rejected to Awarded Applications. CoRR abs/0911.3558 (2009)

Robert L. Goldstone, Loet Leydesdorff: The Import and Export of Cognitive Science. CoRR abs/0911.3641 (2009)

Iina Hellsten, Loet Leydesdorff, Paul Wouters: Multiple Presents: How Search Engines Re-write the Past. CoRR abs/0911.3643 (2009)

Loet Leydesdorff: Similarity Measures, Author Cocitation Analysis, and Information Theory. CoRR abs/0911.4292 (2009)

Diana Lucio-Arias, Loet Leydesdorff: An Indicator of Research Front Activity: Measuring Intellectual Organization as Uncertainty Reduction in Document Sets. CoRR abs/0911.4302 (2009)

Loet Leydesdorff: Giddens' "structuration," Luhmann's "self-organization," and the operationalization of the dynamics of meaning. CoRR abs/0911.5565 (2009)

Loet Leydesdorff: Clusters and Maps of Science Journals Based on Bi-connected Graphs in the Journal Citation Reports. CoRR abs/0912.1221 (2009)

Loet Leydesdorff: The university-industry knowledge relationship: Analyzing patents and the science base of technologies. CoRR abs/0912.1224 (2009)

Loet Leydesdorff, Jin Bihui: Mapping the Chinese Science Citation Database. CoRR abs/0912.1227 (2009)

Koen Frenken, Loet Leydesdorff: Scientometrics and the evaluation of European integration. CoRR abs/0912.1231 (2009)

Loet Leydesdorff, Janelle Ward: Communication of Science Shop Mediation: A Kaleidoscope of University-Society Relations. CoRR abs/0912.1238 (2009)

Loet Leydesdorff: The Construction and Globalization of the Knowledge Base in Inter-human Communication Systems. CoRR abs/0912.1357 (2009)

Loet Leydesdorff, Andrea Scharnhorst: Measuring the Knowledge Base: A Program of Innovation Studies. CoRR abs/0912.1368 (2009)

Loet Leydesdorff: The Mutual Information of University-Industry-Government Relations: An Indicator of the Triple Helix Dynamics. CoRR abs/0912.1369 (2009)

Loet Leydesdorff: 'Interaction' versus 'action' in Luhmann's sociology of communication. CoRR abs/0912.1370 (2009)

Caroline S. Wagner, Loet Leydesdorff: A study of seismology as a dynamic, distributed area of scientific research. CoRR abs/0912.1371 (2009)

Loet Leydesdorff: Communication and Knowledge: How is the knowledge base of an economy constructed? CoRR abs/0912.1372 (2009)

Loet Leydesdorff, Alkim Almila Akdag Salah: Maps on the basis of the Arts & Humanities Citation Index: The journals Leonardo and Art Journal versus "Digital Humanities" as a topic. CoRR abs/0912.3098 (2009)

Ismael Rafols, Alan L. Porter, Loet Leydesdorff: Science overlay maps: a new tool for research policy and library management. CoRR abs/0912.3882 (2009)

Loet Leydesdorff: Configurational Information as Potentially Negative Entropy: The Triple Helix Model. Entropy 10(4): 391-410 (2008)

Loet Leydesdorff: On the normalization and visualization of author co-citation data: Salton's Cosine versus the Jaccard index. JASIST 59(1): 77-85 (2008)

Loet Leydesdorff: Caveats for the use of citation indicators in research and journal evaluations. JASIST 59(2): 278-287 (2008)

Loet Leydesdorff, Ping Zhou: Co-word analysis using the Chinese character set. JASIST 59(9): 1528-1530 (2008)

Loet Leydesdorff: Patent classifications as indicators of intellectual organization. JASIST 59(10): 1582-1597 (2008)

Loet Leydesdorff, Thomas Schank: Dynamic animations of journal maps: Indicators of structural changes and interdisciplinary developments. JASIST 59(11): 1810-1818 (2008)

Diana Lucio-Arias, Loet Leydesdorff: Main-path analysis and path-dependent transitions in HistCite^TM-based historiograms. JASIST 59(12): 1948-1962 (2008)

Loet Leydesdorff, Caroline S. Wagner: International collaboration in science and the formation of a core group. J. Informetrics 2(4): 317-325 (2008)

Loet Leydesdorff: Visualization of the citation impact environments of scientific journals: An online mapping exercise. JASIST 58(1): 25-38 (2007)

Ping Zhou, Loet Leydesdorff: A comparison between the China Scientific and Technical Papers and Citations Database and the Science Citation Index in terms of journal hierarchies and interjournal citation relations. JASIST 58(2): 223-236 (2007)

Loet Leydesdorff: Betweenness centrality as an indicator of the interdisciplinarity of scientific journals. JASIST 58(9): 1303-1319 (2007)

Loet Leydesdorff: Should co-occurrence data be normalized? A rejoinder. JASIST 58(14): 2411-2413 (2007)

Ronald N. Kostoff, J. Antonio del Río, Héctor D. Cortés, Charles Smith, Andrew Smith, Caroline S. Wagner, Loet Leydesdorff, George Karypis, Guido Malpohl, Rene Tshiteya: Clustering methodologies for identifying country core competencies. J. Information Science 33(1): 21-40 (2007)

Loet Leydesdorff, Martin Meyer: The scientometrics of a Triple Helix of university-industry-government relations (Introduction to the topical issue). Scientometrics 70(2): 207-222 (2007)

Diana Lucio-Arias, Loet Leydesdorff: Knowledge emergence in scientific communication: from "fullerenes" to "nanotubes". Scientometrics 70(3): 603-632 (2007)

Loet Leydesdorff, Ping Zhou: Nanotechnology as a field of science: Its delineation in terms of journals and patents. Scientometrics 70(3): 693-713 (2007)

Loet Leydesdorff: Mapping interdisciplinarity at the interfaces between the Science Citation Index and the Social Science Citation Index. Scientometrics 71(3): 391-405 (2007)

Ping Zhou, Loet Leydesdorff: The citation impacts and citation environments of Chinese journals in mathematics. Scientometrics 72(2): 185-200 (2007)

Robert L. Goldstone, Loet Leydesdorff: The Import and Export of Cognitive Science. Cognitive Science 30(6): 983-993 (2006)

Loet Leydesdorff: Can scientific journals be classified in terms of aggregated journal-journal citation relations using the Journal Citation Reports? JASIST 57(5): 601-613 (2006)

Loet Leydesdorff, Stephen J. Bensman: Classification and powerlaws: The logarithmic transformation. JASIST 57(11): 1470-1486 (2006)

Loet Leydesdorff, Liwen Qiu Vaughan: Co-occurrence matrices and their applications in information science: Extending ACA to the Web environment. JASIST 57(12): 1616-1628 (2006)

Loet Leydesdorff: The biological metaphor of a second-order observer and the sociological discourse. Kybernetes 35(3/4): 531-546 (2006)

Michaël Deinema, Loet Leydesdorff: The two faces of American power: Military and political communication during the Cuban missile crisis. Kybernetes 35(3/4): 547-566 (2006)

Iina Hellsten, Loet Leydesdorff, Paul Wouters: Multiple presents: how search engines rewrite the past. New Media & Society 8(6): 901-924 (2006)

Loet Leydesdorff, Iina Hellsten: Measuring the meaning of words in contexts: An automated analysis of controversies about 'Monarch butterflies, ' 'Frankenfoods, ' and 'stem cells'. Scientometrics 67(2): 231-258 (2006)

Loet Leydesdorff: Similarity measures, author cocitation analysis, and information theory. JASIST 56(7): 769-772 (2005)

Loet Leydesdorff, Jin Bihui: Mapping the Chinese Science Citation Database in terms of aggregated journal-journal citation relations. JASIST 56(14): 1469-1479 (2005)

Loet Leydesdorff: Anticipatory Systems and the Processing of Meaning: a Simulation Study Inspired by Luhmann's Theory of Social Systems. J. Artificial Societies and Social Simulation 8(2) (2005)

Loet Leydesdorff, Virginia Trimnle, Peter Vinkler: Walk-round. Scientometrics 63(2): 407-419 (2005)

Loet Leydesdorff, Ping Zhou: Are the contributions of China and Korea upsetting the world system of science? Scientometrics 63(3): 617-630 (2005)

Han Woo Park, Heung Deug Hong, Loet Leydesdorff: A comparison of the knowledge-based innovation systems in the economies of South Korea and the Netherlands using Triple Helix indicators. Scientometrics 65(1): 3-27 (2005)

Paul Wouters, Iina Hellsten, Loet Leydesdorff: Internet time and the reliability of search engines. First Monday 9(10) (2004)

Loet Leydesdorff: The university-industry knowledge relationship: Analyzing patents and the science base of technologies. JASIST 55(11): 991-1001 (2004)

Loet Leydesdorff: Top-down decomposition of the Journal Citation Reportof the Social Science Citation Index: Graph- and factor-analytical approaches. Scientometrics 60(2): 159-180 (2004)

Loet Leydesdorff: Empirical evidence of self-organization? A rejoinder. JASIST 54(8): 804 (2003)

Loet Leydesdorff: Rejoinder to Van den Besselaar's letter entitled Descriptive statistics, inferential statistics, rhetorical statistics. JASIST 54(11): 1077-1078 (2003)

Caroline S. Wagner, Loet Leydesdorff: Seismology as a dynamic, distributed area of scientific research. Scientometrics 58(1): 91-114 (2003)

Loet Leydesdorff, Martin Meyer: The Triple Helix of university-industry-government relations. Scientometrics 58(2): 191-203 (2003)

Loet Leydesdorff: The mutual information of university-industry-government relations: An indicator of the Triple Helix dynamics. Scientometrics 58(2): 445-467 (2003)

Loet Leydesdorff: Dynamic and evolutionary updates of classificatory schemes in scientific journal structures. JASIST 53(12): 987-994 (2002)

Loet Leydesdorff, Gaston Heimeriks: The self-organization of the European Information Society: The case of biotechnology. JASIST 52(13): 1262-1274 (2001)

Loet Leydesdorff: Technology and Culture: the Dissemination and the Potential 'Lock-in' of New Technologies. J. Artificial Societies and Social Simulation 4(3) (2001)

Loet Leydesdorff: Why Words and Co-Words Cannot Map the Development of the Sciences. JASIS 48(5): 418-427 (1997)

Peter Van den Besselaar, Loet Leydesdorff: Mapping Change in Scientific Specialties: A Scientometric Reconstruction of the Development of Artificial Intelligence. JASIS 47(6): 415-436 (1996)

Peter Van den Besselaar, Loet Leydesdorff: Research Performance in Artificial Intelligence and Robotics: An International Comparison. AI Commun. 6(2): 83-91 (1993)