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Havana, Cuba

The Agrarian University of Havana "Fructuoso Rodríguez Pérez" is a university located in Havana, Cuba. Wikipedia.

Carrasco R.C.,University of Alicante | Sanchez Diaz A.,Agricultural University of Havana
RAIRO - Theoretical Informatics and Applications | Year: 2011

It often occurs that local copies of a text are modified by users but that the local modifications are not synchronized (thus allowing the merged text to become the source for later editions) until later when, for instance the network connection is reestablished. Since text editions usually affect a small fraction of the whole content, the history of edit operations provides a compact representation of the modified file. In this paper, we define a normal form for these records which will permit for the comparison of all text files that have been obtained by editing a common source S when the difference between each output file Oi and the source file is given as a sequence L i of edit operations. We show that the normalized sequence is unique for all the equivalent text editions and provide efficient procedures with which to compute this normal form and to obtain the edit sequence LM transforming S into a merged file M which integrates all the local modifications. We also discuss how these normalization can be integrated into the operational transformation paradigm for optimistic replication. © EDP Sciences, 2011.

Vega M.B.,Polytechnic University Jose Antonio Echeverria | Febles J.M.,Agricultural University of Havana | Tolon A.,University of Almeria | Lastra X.,University of Almeria
Cuban Journal of Agricultural Science | Year: 2011

A methodology included in the CORINE software (1992) was applied to evaluate soil erosion qualitatively. The application was performed in the cattle districts of Guayabal and Nazareno, located in the Mayabeque province. This methodology takes into account all the factors, included in thematic maps affecting objectively soil erosion. Each of the maps illustrates the space performance of the different erosion factors in the districts under view. Their summary, through the Geographical Information System (GIS) technology, permitted obtaining a potential erosion map, where the susceptibility to water erosion was represented per classes. The maps of the indices of erodibility and erosivity and the topographic were obtained, and, out of them, that of potential erosion. This latter was evaluated as of low category in the Guayabal cattle district, and as of moderate and high category, in the Nazareno cattle district. It was proved that, although the rain erosivity is the same in both districts, the landscape, rougher in the Nazareno district, controls the potential erosion.

Arencibia-Arrebola D.F.,Instituto Finlay | Rosario-Fernandez L.A.,Institute Farmacia Y Alimentos IFAL | Suarez-Fernandez Y.E.,Agricultural University of Havana
Revista Internacional de Andrologia | Year: 2011

Objective: This article has aimed to compare Balb/c, NMRI, OF-1 and C57BL/6/cenp mice as a biomodel in the assay of the sperm head basal cavity morphology, keeping in mind the frequency of anomalous forms of the basal head and cyclophosphamide-induced (CF) abnormalities. Materials and methods: Twenty animals/group/mice lines were used, administered for 35 days. A negative control group (not administered), two substance-vehicle controls and a positive control administered with 50. mg/kg FG intraperitoneally for five consecutive days were used. Results and discussion: The best experimental biomodel was with the Balb/c mice, with significant difference with the results obtained in the other lines, keeping in mind the spontaneous and induced values in the sperm concentration and frequency of anomalous epididymal sperms. This study will make it possible to use this mice species more efficiently in genotoxic and preclinical toxicology fertility evaluation of drugs, vaccines and other products. © 2011 Sociedad Española de Andrología.

Carrasco R.C.,University of Alicante | Serrano A.,University of Alicante | Castillo-Buergo R.,Agricultural University of Havana
Information Processing and Management | Year: 2016

Bibliographic collections in traditional libraries often compile records from distributed sources where variable criteria have been applied to the normalization of the data. Furthermore, the source records often follow classical standards, such as MARC21, where a strict normalization of author names is not enforced. The identification of equivalent records in large catalogues is therefore required, for example, when migrating the data to new repositories which apply modern specifications for cataloguing, such as the FRBR and RDA standards. An open-source tool has been implemented to assist authority control in bibliographic catalogues when external features (such as the citations found in scientific articles) are not available for the disambiguation of creator names. This tool is based on similarity measures between the variants of author names combined with a parser which interprets the dates and periods associated with the creator. An efficient data structure (the unigram frequency vector trie) has been used to accelerate the identification of variants. The algorithms employed and the attribute grammar are described in detail and their implementation is distributed as an open-source resource to allow for an easier uptake. © 2016 Elsevier Ltd.

Some considerations are exposed for the introduction of the information literacy in the specialty of Library and Information Science, a model continuity of studies. A technique of the documental analysis was used in the revision of documents that shows the contemporary pedagogic models and the main contributions that serve as a base before the designing of educational proposals. Also, the revision of the study plan allowed considering the employment of methods for the formation for competitions: problem based learning and project oriented learning, taking as an alternative in the design of an educational proposal of information literacy for the development of the informational competence in this professional. ©ECIMED.

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