Leo Egghe

2014

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A good normalized impact and concentration measure.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2014 Volume 65 Issue 10
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Informetric explanation of some Leiden Ranking graphs.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2014 Volume 65 Issue 4

2013

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Study of the rank- and size-frequency functions in the case of power law growth of sources and items and proof of Heaps' law.
Leo Egghe
Information Processing and Management 2013 Volume 49 Issue 1
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Theory of the topical coverage of multiple databases.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2013 Volume 64 Issue 1
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Comparative study of four impact measures and qualitative conclusions.
Leo Egghe
Information Processing and Management 2013 Volume 49 Issue 4
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Corrigendum to "Study of the rank- and size-frequency functions in the case of power law growth of sources and items and proof of Heaps' law" [Inform. Process. Manage 49 (2013) 99-107].
Leo Egghe
Information Processing and Management 2013 Volume 49 Issue 4
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Note on a possible decomposition of the h-Index.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2013 Volume 64 Issue 4

2012

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Remarks on the paper by A. De Visscher, "what does the g-index really measure?".
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2012 Volume 63 Issue 10
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Erratum.
Leo Egghe|Raf Guns|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2012 Volume 63 Issue 2
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The Hirsch index of a shifted Lotka function and its relation with the impact factor.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2012 Volume 63 Issue 5
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Applications of the generalized law of Benford to informetric data.
Leo Egghe|Raf Guns
Journal of the Association for Information Science and Technology (JASIST) 2012 Volume 63 Issue 8

2011

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Relations between the shape of a size-frequency distribution and the shape of a rank-frequency distribution.
Leo Egghe|Ludo Waltman
Information Processing and Management 2011 Volume 47 Issue 2
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Thoughts on uncitedness: Nobel laureates and Fields medalists as case studies.
Leo Egghe|Raf Guns|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2011 Volume 62 Issue 8

2010

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Good properties of similarity measures and their complementarity.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2010 Volume 61 Issue 10
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A new short proof of Naranan's theorem, explaining Lotka's law and Zipf's law.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2010 Volume 61 Issue 12
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Influence of adding or deleting items and sources on the h-index.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2010 Volume 61 Issue 2
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On the relation between the association strength and other similarity measures.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2010 Volume 61 Issue 7

2009

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A rationale for the Hirsch-index rank-order distribution and a comparison with the impact factor rank-order distribution.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2009 Volume 60 Issue 10
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A relation between h-index and impact factor in the power-law model.
Leo Egghe|Liming Liang|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2009 Volume 60 Issue 11
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Mathematical study of h-index sequences.
Leo Egghe
Information Processing and Management 2009 Volume 45 Issue 2
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New relations between similarity measures for vectors based on vector norms.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2009 Volume 60 Issue 2
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An econometric property of the g-index.
Leo Egghe
Information Processing and Management 2009 Volume 45 Issue 4
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The relation between Pearson's correlation coefficient r and Salton's cosine measure.
Leo Egghe|Loet Leydesdorff
Journal of the Association for Information Science and Technology (JASIST) 2009 Volume 60 Issue 5

2008

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Mathematical theory of the h- and g-index in case of fractional counting of authorship.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 10
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The influence of the broadness of a query of a topic on its h-index: Models and examples of the h-index of n-grams.
Leo Egghe|I. K. Ravichandra Rao
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 10
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A model for the size-frequency function of coauthor pairs.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 13
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The measures precision, recall, fallout and miss as a function of the number of retrieved documents and their mutual interrelations.
Leo Egghe
Information Processing and Management 2008 Volume 44 Issue 2
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An h-index weighted by citation impact.
Leo Egghe|Ronald Rousseau
Information Processing and Management 2008 Volume 44 Issue 2
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The influence of transformations on the h-index and the g-index.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 8
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Study of different h-indices for groups of authors.
Leo Egghe|I. K. Ravichandra Rao
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 8
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Fundamental properties of rhythm sequences.
Leo Egghe|Liming Liang|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2008 Volume 59 Issue 9

2007

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Existence theorem of the quadruple (P, R, F, M): Precision, recall, fallout and miss.
Leo Egghe
Information Processing and Management 2007 Volume 43 Issue 1
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Dynamic h-index: The Hirsch index in function of time.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2007 Volume 58 Issue 3
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Untangling Herdan's law and Heaps' law: Mathematical and informetric arguments.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2007 Volume 58 Issue 5
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Uncertainty and information: Foundations of generalized information theory.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2007 Volume 58 Issue 5
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TOP-curves.
Leo Egghe|Ronald Rousseau|Sandra Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2007 Volume 58 Issue 6

2006

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Classical retrieval and overlap measures satisfy the requirements for rankings based on a Lorenz curve.
Leo Egghe|Ronald Rousseau
Information Processing and Management 2006 Volume 42 Issue 1
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Expansion of the field of informetrics: The second special issue.
Leo Egghe
Information Processing and Management 2006 Volume 42 Issue 6
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Systems without low-productive sources.
Leo Egghe|Ronald Rousseau
Information Processing and Management 2006 Volume 42 Issue 6
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Properties of the n-overlap vector and n-overlap similarity theory.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2006 Volume 57 Issue 9

2005

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Expansion of the field of informetrics: Origins and consequences.
Leo Egghe
Information Processing and Management 2005 Volume 41 Issue 6
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Continuous, weighted Lorenz theory and applications to the study of fractional relative impact factors.
Leo Egghe
Information Processing and Management 2005 Volume 41 Issue 6
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Relations between the continuous and the discrete Lotka power function.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2005 Volume 56 Issue 7
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The power of power laws and an interpretation of Lotkaian informetric systems as self-similar fractals.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2005 Volume 56 Issue 7
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Zipfian and Lotkaian continuous concentration theory.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2005 Volume 56 Issue 9

2004

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A universal method of information retrieval evaluation: the "missing" link M and the universal IR surface.
Leo Egghe
Information Processing and Management 2004 Volume 40 Issue 1
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Vector retrieval, fuzzy retrieval and the universal fuzzy IR surface for IR evaluation.
Leo Egghe
Information Processing and Management 2004 Volume 40 Issue 4

2003

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a Measure for the Cohesion of Weighted Networks.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2003 Volume 54 Issue 3
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Construction of weak and strong similarity measures for ordered sets of documents using fuzzy set techniques.
Leo Egghe|Christine Michel
Information Processing and Management 2003 Volume 39 Issue 5
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Type/Token-Taken informetrics.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2003 Volume 54 Issue 7

2002

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Duality revisited: Construction of fractional frequency distributions based on two dual Lotka laws.
Leo Egghe|I. K. Ravichandra Rao
Journal of the Association for Information Science and Technology (JASIST) 2002 Volume 53 Issue 10
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Sampling and concentration values of incomplete bibliographies.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2002 Volume 53 Issue 4
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Book review: Mathematical foundations of information retrieval.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2002 Volume 53 Issue 5
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Strong similarity measures for ordered sets of documents in information retrieval.
Leo Egghe|Christine Michel
Information Processing and Management 2002 Volume 38 Issue 6

2001

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A noninformetric analysis of the relationship between citation age and journal productivity.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 2001 Volume 52 Issue 5

2000

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Aging, obsolescence, impact, growth, and utilization: Definitions and relations.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2000 Volume 51 Issue 11
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Partial orders and measures for language preferences.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2000 Volume 51 Issue 12
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The influence of publication delays on the observed aging distribution of scientific literature.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 2000 Volume 51 Issue 2
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Methods for accrediting publications to authors or countries: Consequences for evaluation studies.
Leo Egghe|Ronald Rousseau|Guido Van Hooydonk
Journal of the Association for Information Science and Technology (JASIST) 2000 Volume 51 Issue 2

1999

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On the Law of Zipf-Mandelbrot for Multi-Wort Phrases.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1999 Volume 50 Issue 3

1998

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Topological Aspects of Information Retrieval.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 1998 Volume 49 Issue 13
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A Theoretical Study of Recall and Precision Using a Topological Approach to Information Retrieval.
Leo Egghe|Ronald Rousseau
Information Processing and Management 1998 Volume 34 Issue 2-3

1997

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Price Index and Its Relation to the Mean and Median Reference Age.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1997 Volume 48 Issue 6

1996

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Source-Item Production Laws for the Case That Items Have Multiple Sources with Fractional Counting of Credits.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1996 Volume 47 Issue 10
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Modelling Multi-Relational Data with Special Attention to the Average Number of Collaborators as a Variable in Informetric Distributions.
Leo Egghe|Ronald Rousseau
Information Processing and Management 1996 Volume 32 Issue 5

1995

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Sensitivity Aspects of Inequality Measures.
Leo Egghe|Ronald Rousseau
Information Processing and Management 1995 Volume 31 Issue 4
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Generalized Success-Breeds-Success Principle Leading to Time-Dependent Informetric Distributions.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 1995 Volume 46 Issue 6

1994

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A Theory of Continuous Rates and Applications to the Theory of Growth and Obsolescence Rates.
Leo Egghe
Information Processing and Management 1994 Volume 30 Issue 2
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Special Features of the Author-Publication Relationship and a New Explanation of Lotka's Law Based on Convolution Theory.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1994 Volume 45 Issue 6

1993

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Evolution of Information Production Processes and its Relation to the Lorenz Dominance Order.
Leo Egghe|Ronald Rousseau
Information Processing and Management 1993 Volume 29 Issue 4
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Exact Probabilistic and Mathematical Proofs of the Relation Between the Mean µ and the Generalized 80/20-Rule.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1993 Volume 44 Issue 7

1992

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Duality Aspects of the Gini Index for General Information Production Processes.
Leo Egghe
Information Processing and Management 1992 Volume 28 Issue 1
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Citation Age Data and the Obsolescence Function: Fits and Explanations.
Leo Egghe|I. K. Ravichandra Rao
Information Processing and Management 1992 Volume 28 Issue 2

1991

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Rational normalization of concentration measures.
P. Bonckaert|Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1991 Volume 42 Issue 10
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Theory of collaboration and collaborative measures.
Leo Egghe
Information Processing and Management 1991 Volume 27 Issue 2-3
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Transfer principles and a classification of concentration measures.
Leo Egghe|Ronald Rousseau
Journal of the Association for Information Science and Technology (JASIST) 1991 Volume 42 Issue 7

1990

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A note on different Bradford multipliers.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1990 Volume 41 Issue 3
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Applications of the theory of Bradford's Law to the calculation of Leimkuhler's Law and to the completion of bibliographies.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1990 Volume 41 Issue 7
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A New Method for Information Retrieval, Based on the Theory of Relative Concentration.
Leo Egghe
SIGIR'90, 13th International Conference on Research and Development in Information Retrieval, Brussels, Belgium, 5-7 September 1990, Proceedings

1988

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Concentration places, concentration evolutions, and online information retrieval techniques for calculating them.
Leo Egghe
Information Processing and Management 1988 Volume 24 Issue 2
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The relative concentration of a journal with respect to a subject and the use of online services in calculating it.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1988 Volume 39 Issue 4
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Mathematical relations between impact factors and average number of citations.
Leo Egghe
Information Processing and Management 1988 Volume 24 Issue 5

1987

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Pratt's measure for some bibliometric distributions and its relation with the 80/20 rule.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1987 Volume 38 Issue 4

1986

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The dual of Bradford's law.
Leo Egghe
Journal of the Association for Information Science and Technology (JASIST) 1986 Volume 37 Issue 4