Publication: Medidas del solapamiento en tres bases de datos con información sobre ingeniería.
Authors
Pulgarín Guerrero, Antonio
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Facultad de Comunicación y Documentación
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Publisher
Murcia, Universidad de Murcia, Servicio de Publicaciones
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DOI
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info:eu-repo/semantics/article
Description
Abstract
El contenido de las bases de datos suele variar tanto en diversidad temática como en extensión; unas cubren información específica, mientras que otras son multidisciplinares. Por eso es difícil seleccionar cual o cuales se mantienen o eliminan del repertorio de un servicio de información, cuando entran en juego factores económicos o de otra índole. El estudio del solapamiento y/o la cobertura de una serie de bases de datos corresponden a la Informetría. Los resultados serán fundamentales a la hora de tomar una decisión al respecto. El presente trabajo lleva a cabo un estudio del solapamiento y/o cobertura que presentan tres bases de datos con contenidos en ingeniería (IEL, INSPEC y PASCAL). Se emplearon índices de solapamiento y de semejanza (Jaccard y de Meyer entre otros) para comparar estas tres ba-ses de datos. Los resultados muestran una gran diferencia entre las bases de datos, tanto en cobertura como en solapamiento. INSPEC es la base de datos con mayor cobertura (aproximadamente el 50 % de los documentos y más del 50 % de las fuentes) y un solapamiento con las otras dos bases de datos superior al 30 %.
ABSTRACT: The content of the databases usually varies so much in thematic diversity as in extension; some data bases cover specific information, whereas others are mul-tidisciplinary. For that reason it is difficult to select as or as they stay or they elimi-nate of the collection of an information service, when economic factors take part or of another nature. The study of the overlapping and/or the cover of a series of data bases it corresponds to the field of informetrics. The results will be fundamental at the time of making a decision on the matter. The present work carries out a study of the overlapping and/or cover that present three data bases with contents in engineer-ing (IEL, INSPEC and PASCAL). Similarity and overlapping indices were used (Jaccard and Meyer among others) to compare these three data bases. The results show a great difference between the data bases, as much in cover as in overlapping. INSPEC were the data base with greater cover (approximately 50% of documents and more of 50% of the sources) and an overlapping with the other data bases supe-rior to 30%.
ABSTRACT: The content of the databases usually varies so much in thematic diversity as in extension; some data bases cover specific information, whereas others are mul-tidisciplinary. For that reason it is difficult to select as or as they stay or they elimi-nate of the collection of an information service, when economic factors take part or of another nature. The study of the overlapping and/or the cover of a series of data bases it corresponds to the field of informetrics. The results will be fundamental at the time of making a decision on the matter. The present work carries out a study of the overlapping and/or cover that present three data bases with contents in engineer-ing (IEL, INSPEC and PASCAL). Similarity and overlapping indices were used (Jaccard and Meyer among others) to compare these three data bases. The results show a great difference between the data bases, as much in cover as in overlapping. INSPEC were the data base with greater cover (approximately 50% of documents and more of 50% of the sources) and an overlapping with the other data bases supe-rior to 30%.
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