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Egghe, L.; Rousseau, R.: Averaging and globalising quotients of informetric and scientometric data (1996) 0.02

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Abstract: It is possible, using ISI's Journal Citation Report (JCR), to calculate average impact factors (AIF) for LCR's subject categories but it can be more useful to know the global Impact Factor (GIF) of a subject category and compare the 2 values. Reports results of a study to compare the relationships between AIFs and GIFs of subjects, based on the particular case of the average impact factor of a subfield versus the impact factor of this subfield as a whole, the difference being studied between an average of quotients, denoted as AQ, and a global average, obtained as a quotient of averages, and denoted as GQ. In the case of impact factors, AQ becomes the average impact factor of a field, and GQ becomes its global impact factor. Discusses a number of applications of this technique in the context of informetrics and scientometrics
Source: Journal of information science. 22(1996) no.3, S.165-170
Type: a

Rousseau, R.: Bradford curves (1994) 0.01

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Abstract: It is shown that generalized Leimkuhler functions give proper fits to a large variety of Bradford curves, including those exhibited a so-called Groos droop or a rising tail
Source: Information processing and management. 30(1994) no.2, S.267-277
Type: a

Egghe, L.; Rousseau, R.: Topological aspects of information retrieval (1998) 0.01

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Abstract: Let (DS, DQ, sim) be a retrieval system consisting of a document space DS, a query space QS, and a function sim, expressing the similarity between a document and a query. Following D.M. Everett and S.C. Cater (1992), we introduce topologies on the document space. These topologies are generated by the similarity function sim and the query space QS. 3 topologies will be studied: the retrieval topology, the similarity topology and the (pseudo-)metric one. It is shown that the retrieval topology is the coarsest of the three, while the (pseudo-)metric is the strongest. These 3 topologies are generally different, reflecting distinct topological aspects of information retrieval. We present necessary and sufficient conditions for these topological aspects to be equal
Source: Journal of the American Society for Information Science. 49(1998) no.13, S.1144-1160
Type: a

Egghe, L.; Rousseau, R.: ¬A theoretical study of recall and precision using a topological approach to information retrieval (1998) 0.01

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Abstract: Topologies for information retrieval systems are generated by certain subsets, called retrievals. Shows how recall and precision can be expressed using only retrievals. Investigates different types of retrieval systems: both threshold systems and close match systems and both optimal and non optimal retrieval. Highlights the relation with the hypergeometric and some non-standard distributions
Source: Information processing and management. 34(1998) nos.2/3, S.191-218
Type: a

Egghe, L.; Rousseau, R.: Duality in information retrieval and the hypegeometric distribution (1997) 0.01

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Abstract: Asserts that duality is an important topic in informetrics, especially in connection with the classical informetric laws. Yet this concept is less studied in information retrieval. It deals with the unification or symmetry between queries and documents, search formulation versus indexing, and relevant versus retrieved documents. Elaborates these ideas and highlights the connection with the hypergeometric distribution
Type: a

Rousseau, R.: ¬A table for estimating the exponent in Lotka's law (1993) 0.00

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Type: a

Rousseau, R.: Use of an existing thesaurus in a knowledge based indexing and retrieval system (1991) 0.00

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Abstract: A simple heuristic method is proposed to use an existing thesaurus for weighted indexing
Type: a

Egghe, L.; Rousseau, R.: Introduction to informetrics : quantitative methods in library, documentation and information science (1990) 0.00

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COMPASS: Information science / Statistical mathematics
LCSH: Information science / Statistical methods
Subject: Information science / Statistical mathematics
Information science / Statistical methods

Harvey, L.; Rousseau, R.: Development of text-editing skill : from semantic and syntactic mappings to procedures (1995) 0.00
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Abstract

Considers whether joint syntax (a single step linking object and procedure) or disjoint, 2 step, processes are best suited to particular tasks of text editing. Finds that specific procedures are not necessarily faster to use than general ones. users of joint editors consulted the help menu less often and for longer and experienced a greater workload than users of disjoint editors. The experiment shows that general text editing procedures obeying a disjoint systax minimize workload. Specific objects and joint syntax are advanced features that should be reserved for experienced users

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