Xavier Polanco

Xavier Polanco
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48
Publications
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404
Citations
Citations since 2016
0 Research Items
93 Citations
2016201720182019202020212022051015
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2016201720182019202020212022051015
2016201720182019202020212022051015

Publications

Publications (48)
Article
Full-text available
Applications of non-parametric frontier production methods such as Data Envelopment Analysis (DEA) have gained popularity and recognition in scientometrics. However, the connection between the results obtained from the application of DEA and descriptive characteristics of each scientific discipline have not been fully explored. Although there are w...
Article
Full-text available
A new type of statistical analysis of the science and technical information (STI) in the Web context is produced. We propose a set of indicators about Web users, visualized bibliographic records, and e-commercial transactions. In addition, we introduce two Web usage factors. Finally, we give an overview of the co-usage analysis. For these tasks, we...
Article
Full-text available
STANALYST : A quoi sert-il ? Comment est-il fait ? A quelle conception réponde-t-il ? Nous allons essayer de donner réponse à ces trois questions nous situant dans le contexte de la science de l’information. Ici nous nous concentrons essentiellement sur la fonction et la conception qui sont à la base de STANALYST en laissant de côté son mode d’empl...
Article
Full-text available
The proposal is to use clusters, graphs and networks as models in order to analyse the Web structure. Clusters, graphs and networks provide knowledge representation and organization. Clusters were generated by co-site analysis. The sample is a set of academic Web sites from the countries belonging to the European Union. These clusters are here revi...
Article
El objetivo de este trabajo es presentar un modo de analizar el estado y la evolución de la investigación científica (que en el titulo llamamos “infraestructura científica”) de donde se generan las tecnologías de la información y las comunicaciones (TICs), las cuales se encuentran en la base de la sociedad de la información y que darán paso a una s...
Article
Full-text available
We argue that any document set can be modelled as a hypergraph, and we apply a graph clustering process as a way of analysis. A variant of the single link clustering is presented, and we assert that it is better suited to extract interesting clusters formed along easily interpretable paths of associated items than algorithms based on detecting high...
Article
Full-text available
Este artículo presenta un sistema informático capaz de producir por una parte estadísticas descriptivas de los datos bibliográficos accesibles por la Web, y por otra una información estadística sobre el comportamiento de los usuarios. Al mismo tiempo, es un instrumento de trabajo, en el sentido que el sistema permite igualmente de realizar de maner...
Conference Paper
Full-text available
This paper presents a methodology for the semantic an- notation of web pages with individuals of a domain ontol- ogy. While most semantic annotation systems can recognize knowledge units, they usually do not establish explicit re- lations between them. The method presented identifies the individuals which should be related among the whole set of in...
Article
Full-text available
In this paper we revisit this main idea of co-word analysis based on the computation of all geodesic paths, and it is considered that the variants of single link clustering (SLC) are better suited to extract interesting clusters formed along easily interpretable paths of associated items than algorithms based on detecting high density regions. More...
Article
Full-text available
Nuestro objetivo es de mostrar que la red tecnológica representada por Internet y la Web, obedece al modelo de los sistemas no lineales y de ley de potencia (sección 3), y que presenta un modo de desarrollo característico (sección 4). Siguiendo el ejemplo del análisis de redes sociales, la Web puede ser analizada, de acuerdo a la teoría de grafos,...
Article
Full-text available
Cet article présente un système automatique d'annotation sémantique de pages web. Les systèmes d'annotation automatique existants sont essentiellement syntaxiques, même lorsque les travaux visent à produire une annotation sémantique. La prise en compte d'informations sémantiques sur le domaine pour l'annotation d'un élément dans une page web à part...
Article
Full-text available
We present a new kind of statistical analysis of science and technical information (STI) in the Web context. We propose a battery of indicators about Web users, used bibliographic records and e-commercial transactions. In addition, we introduce two Web usage factors and we give an overview of the co-usage analysis. For these tasks, we present a com...
Article
Full-text available
This article presents a system to extract Knowledge from webpages by producing semantic annotations. taking into account seman- tic information from the domain to annotate an element in a webpage implies solving two problems : (1) identifying the syntactic structure of this element in the webpage and (2) identifying the most specic concept (in term...
Article
Full-text available
The idea that graph theory would be useful in co-word analysis was suggested to us by social network analysis, where both graph theory and matrix operations have been widely used (Wasserman & Faust, 1999; Degenne & Forsé, 2000). In co-word analysis tradition, Courtial (1986) had started to explain the co-word clusters in terms of graphs. However, h...
Article
This paper present a compound approach for Webometrics based on an extension the self-organizing multimap MultiSOM model. The goal of this new approach is to combine link and domain clustering in order to increase the reliability and the precision of Webometrics studies. The extension proposed for the MultiSOM model is based on a Bayesian network-o...
Article
Full-text available
Le but de cette communication est de comparer deux méthodes initialement destinées à la veille scientifique et technique dans une application de fouille de textes. Les deux méthodes proposent à l'utilisateur de visualiser les résultats d'une classification hiérarchique non supervisée de données textuelles sous forme d'une carte thématique. Elles so...
Article
This article presents the human evaluation of ILIAD, a program for machine-aided indexing (MAI). It consists of two language engineering modules and is designed to assist expert librarians in computer-aided indexing and document analysis. Our aim is the expert evaluation of automatic multi-word term indexing. Evaluation is performed by documentary...
Article
Full-text available
The main area of this paper concerns the methods for mapping scientific and technical information (articles, patents) and for assisting a user in carrying out the complex process of analysing large quantities of information. This set of methods comprises clustering, cartography, and hypertext generation. Nevertheless, in the procedure of informatio...
Article
Full-text available
We argue in favour of artificial neural networks for exploratory data analysis, clustering andmapping. We propose the Kohonen self-organizing map (SOM) for clustering and mappingaccording to a multi-maps extension. It is consequently called Multi-SOM. Firstly the KohonenSOM algorithm is presented. Then the following improvements are detailed: the w...
Article
This article deals with a method of research topic discovery and visualization. Its implementation is called MULTI-SOM. The prefix MULTI indicates an extension of the Kohonen's Self-Organizing Map (SOM) in terms of multiple maps. This model is founded on the concept of viewpoint, and the implementation of the viewpoints into SOMs shaped in logical...
Article
Full-text available
We present a Kohonen-based self-organizing multi-map algorithm. It is called MultiSOM. Firstly, we consider the unsupervised competitive learning mode of mapping data. We examine the naming of classes and the division of the global map into logical areas. We expose the two extended capabilities of the MultiSOM: generalization and inter-map communic...
Conference Paper
Full-text available
Mapping knowledge structures is a key task in Knowledge Discovery in Databases (KDD). In order to display the thematic organization of knowledge, we compare and evaluate two different cartography approaches: principal components analysis (PCA) and a multilayer perceptron (MLP) in “self-association” mode. This kind of MLP can be used to perform a PC...
Article
Full-text available
This paper describes the implementation of multivariate data analysis: NEURODOC applies the axial k-means method for automatic, non-hierarchical cluster analysis and a Principal Component Analysis (PCA) for representing the clusters on a map. We next introduce Artificial Neural Networks (ANNs) to extend NEURODOC into a neural platform for the clust...
Article
A computer system combining hypertext and database management technologies is shown to be appropriate with the goals of information analysis. Such a system, HENOCH, designed to easily store any SGML document in a relational database, and to make these data accessible via the World Wide Web is exemplified in the particular case where the stored data...
Article
Paris, Biotem Editions, 1998, p. 191-198 (ISBN 2-911119-09-6)
Article
The paper presents a coword-analysis-based system called SDOC which is able to support the intellectual work of an enduser who is searching for information in a bibliographic database. This is done by presenting its thcmatical structure as a map of keyword clusters (themes) on a graphical user interface. These mapping facilities are demonstrated on...
Chapter
Perhaps the most striking feature of the problems we have just encountered about world science is how modern European science has developed within European geographical boundaries, and expanded outside its geographical area towards others continents. Our problem is therefore to explain this expansion and importation process (export and import probl...
Article
1 INTRODUCCIÓN Es evidente que hoy en día nos encontramos en un nuevo contexto desde donde considerar la bibliometría y la cienciometría. Este nuevo contexto se lo conoce bajo la denominación de "sociedad de la información", y se caracteriza por la irrupción de nuevas tecnologías de la información. Estas nuevas tecnologías de la información se orie...
Article
Full-text available
This paper describes the implementation of an association analysis method to process Web site data. The association analysis makes use of Web site links in order to produce a representation of sites association structure. A description of the association network is the goal to reach. The data refers to 791 university sites from the 15 countries bel...

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