Buscar material en bibliotecas ó centros de información Fichero manual Catálogo informatizado de ... more Buscar material en bibliotecas ó centros de información Fichero manual Catálogo informatizado de cada biblioteca Especialista: encargado de expresar la necesidad de información del usuario mediante una estrategia de búsqueda Problemas Tiempo elevado de búsqueda (ir de biblioteca en biblioteca) Información desactualizada e insuficiente
Abstract In this paper, a new indexing and similarity search method based on dynamic selection of... more Abstract In this paper, a new indexing and similarity search method based on dynamic selection of pivots is presented. It uses Sparse Spatial Selection (SSS) for the initial selection of pivots. Two new selection policies of pivots are added, in order to the index ...
This article presents the results of a survey and qualitative study of needs and practices of ope... more This article presents the results of a survey and qualitative study of needs and practices of open access scholarly works dissemination.The survey and study focused on different issues related to usability, navigation, and accessibility of institutional repositories, which have guided the design of an experimental prototype in the context of a regional project that joins three universities in Argentina. In such academic practices, the teaching community offers various types of production and simultaneous application areas for digital objects. Thus, there is a technological requirement to enable users to carry out their self-archiving process of different objects, in a user-friendly way, allowing them to upload these objects in various collections. A prototype was implemented and tested in order to obtain an initial assessment of the proposed model.
Interdisciplinary Journal of E-Learning and Learning Objects (IJELLO)
In the last years, the development of different Repositories of Learning Objects has been in-crea... more In the last years, the development of different Repositories of Learning Objects has been in-creased. Users can retrieve these resources for reuse and personalization through searches in web repositories. The importance of high quality metadata is key for a successful retrieval. Learning Objects are described with metadata usually in the standard IEEE LOM. We have designed and implemented a Learning Object Metadata ontology (LOM ontology) that establishes an interme-diate layer offering a shared vocabulary that allows specifying restrictions and gives a common semantics for any application which uses Learning Objects metadata. Thus, every change in the LOM ontology will be reflected in the different applications that use this ontology with no need to modify their code. In this work, as a proof of concept, we present an assistant prototype to help users to load these Objects in repositories. This prototype automatically extracts, restricts and validates the Learning Objects metadata ...
This paper presents a data structure based on Sparse Spatial Selection (SSS) for similarity searc... more This paper presents a data structure based on Sparse Spatial Selection (SSS) for similarity searching. An algorithm that tries periodically to adjust pivots to the use of database index is presented. This index is dynamic. In this way, it is possible to improve the amount of discriminations done by the pivots. So, the primary objective of indexes is achieved: to reduce the number of distance function evaluations, as it is showed in the experimentation.
In this paper we propose to facilitate the load process of educational digital objects in reposit... more In this paper we propose to facilitate the load process of educational digital objects in repositories by modifying the standard load flow of platforms such as DSpace. Also, we propose an architecture of a Wizard for automatically extracting some metadata of documents. This metadata will be validated by the user in the describing process of an object. For the assistant, we analyzed several extraction tools and we propose to use a combination of them. A prototype of this wizard will be implemented in RepHip, Repository of the National University of Rosario. It is expected assist the user in the load process by reducing his/her work and improving the quantity and quality of the metadata loaded.
Web Information Retrieval is another problem of searching elements of a set that are closest to a... more Web Information Retrieval is another problem of searching elements of a set that are closest to a given query under a certain similarity criterion. It is of interest to take advantage of metric spaces in order to solve a search in an effective and efficient way. In this article, we present an extension of the M-Tree index, called XM-Tree, in order to improve search results. This index allows dynamic insertion of new data, reduces search costs using pruning and precalculated distances, and uses a tolerable amount of space, which makes this index apt for the extensive and dynamic Web. The proposed extension indexes Web documents, uses L 2 as indexing distance and L ∞ as similarity criterion to solve queries. We also present experiments validating the results.
En este trabajo se presentan los resultados de una consulta abierta en línea aplicada a profesore... more En este trabajo se presentan los resultados de una consulta abierta en línea aplicada a profesores y estudiantes de la Universidad Nacional de Rosario, para evaluar su predisposición al uso y creación de libros de texto abiertos en formatos digitales, como así también las preferencias que tienen con respecto a estos libros. Esta encuesta se realizó en el marco de la Iniciativa LATIn (Latin American open Textbook Initiative), la cual plantea la creación colaborativa de libros de texto abiertos para la educación superior en América Latina.
El libro recoge ponencias y talleres seleccionados de JALIMI 2005 (Jornadas Argentinas de Lingüís... more El libro recoge ponencias y talleres seleccionados de JALIMI 2005 (Jornadas Argentinas de Lingüística Informática: Modelización e Ingeniería), y está organizado en nueve capítulos y un apéndice. Si bien hay sustantivas diferencias en los enfoques, las metodologías, las propiedades específicas estudiadas y las aplicaciones propuestas o proyectadas, todos los capítulos comunican resultados de investigaciones que pretenden contribuir a alcanzar el objetivo a largo plazo de la Lingüística Informática, a saber: emular en términos cibernéticos la extraordinaria capacidad humana de producir y comprender textos en lengua natural.
Buscar material en bibliotecas ó centros de información Fichero manual Catálogo informatizado de ... more Buscar material en bibliotecas ó centros de información Fichero manual Catálogo informatizado de cada biblioteca Especialista: encargado de expresar la necesidad de información del usuario mediante una estrategia de búsqueda Problemas Tiempo elevado de búsqueda (ir de biblioteca en biblioteca) Información desactualizada e insuficiente
Abstract In this paper, a new indexing and similarity search method based on dynamic selection of... more Abstract In this paper, a new indexing and similarity search method based on dynamic selection of pivots is presented. It uses Sparse Spatial Selection (SSS) for the initial selection of pivots. Two new selection policies of pivots are added, in order to the index ...
This article presents the results of a survey and qualitative study of needs and practices of ope... more This article presents the results of a survey and qualitative study of needs and practices of open access scholarly works dissemination.The survey and study focused on different issues related to usability, navigation, and accessibility of institutional repositories, which have guided the design of an experimental prototype in the context of a regional project that joins three universities in Argentina. In such academic practices, the teaching community offers various types of production and simultaneous application areas for digital objects. Thus, there is a technological requirement to enable users to carry out their self-archiving process of different objects, in a user-friendly way, allowing them to upload these objects in various collections. A prototype was implemented and tested in order to obtain an initial assessment of the proposed model.
Interdisciplinary Journal of E-Learning and Learning Objects (IJELLO)
In the last years, the development of different Repositories of Learning Objects has been in-crea... more In the last years, the development of different Repositories of Learning Objects has been in-creased. Users can retrieve these resources for reuse and personalization through searches in web repositories. The importance of high quality metadata is key for a successful retrieval. Learning Objects are described with metadata usually in the standard IEEE LOM. We have designed and implemented a Learning Object Metadata ontology (LOM ontology) that establishes an interme-diate layer offering a shared vocabulary that allows specifying restrictions and gives a common semantics for any application which uses Learning Objects metadata. Thus, every change in the LOM ontology will be reflected in the different applications that use this ontology with no need to modify their code. In this work, as a proof of concept, we present an assistant prototype to help users to load these Objects in repositories. This prototype automatically extracts, restricts and validates the Learning Objects metadata ...
This paper presents a data structure based on Sparse Spatial Selection (SSS) for similarity searc... more This paper presents a data structure based on Sparse Spatial Selection (SSS) for similarity searching. An algorithm that tries periodically to adjust pivots to the use of database index is presented. This index is dynamic. In this way, it is possible to improve the amount of discriminations done by the pivots. So, the primary objective of indexes is achieved: to reduce the number of distance function evaluations, as it is showed in the experimentation.
In this paper we propose to facilitate the load process of educational digital objects in reposit... more In this paper we propose to facilitate the load process of educational digital objects in repositories by modifying the standard load flow of platforms such as DSpace. Also, we propose an architecture of a Wizard for automatically extracting some metadata of documents. This metadata will be validated by the user in the describing process of an object. For the assistant, we analyzed several extraction tools and we propose to use a combination of them. A prototype of this wizard will be implemented in RepHip, Repository of the National University of Rosario. It is expected assist the user in the load process by reducing his/her work and improving the quantity and quality of the metadata loaded.
Web Information Retrieval is another problem of searching elements of a set that are closest to a... more Web Information Retrieval is another problem of searching elements of a set that are closest to a given query under a certain similarity criterion. It is of interest to take advantage of metric spaces in order to solve a search in an effective and efficient way. In this article, we present an extension of the M-Tree index, called XM-Tree, in order to improve search results. This index allows dynamic insertion of new data, reduces search costs using pruning and precalculated distances, and uses a tolerable amount of space, which makes this index apt for the extensive and dynamic Web. The proposed extension indexes Web documents, uses L 2 as indexing distance and L ∞ as similarity criterion to solve queries. We also present experiments validating the results.
En este trabajo se presentan los resultados de una consulta abierta en línea aplicada a profesore... more En este trabajo se presentan los resultados de una consulta abierta en línea aplicada a profesores y estudiantes de la Universidad Nacional de Rosario, para evaluar su predisposición al uso y creación de libros de texto abiertos en formatos digitales, como así también las preferencias que tienen con respecto a estos libros. Esta encuesta se realizó en el marco de la Iniciativa LATIn (Latin American open Textbook Initiative), la cual plantea la creación colaborativa de libros de texto abiertos para la educación superior en América Latina.
El libro recoge ponencias y talleres seleccionados de JALIMI 2005 (Jornadas Argentinas de Lingüís... more El libro recoge ponencias y talleres seleccionados de JALIMI 2005 (Jornadas Argentinas de Lingüística Informática: Modelización e Ingeniería), y está organizado en nueve capítulos y un apéndice. Si bien hay sustantivas diferencias en los enfoques, las metodologías, las propiedades específicas estudiadas y las aplicaciones propuestas o proyectadas, todos los capítulos comunican resultados de investigaciones que pretenden contribuir a alcanzar el objetivo a largo plazo de la Lingüística Informática, a saber: emular en términos cibernéticos la extraordinaria capacidad humana de producir y comprender textos en lengua natural.
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