201 research outputs found

    Estrategia pedagógica basada en el teatro y el dibujo para promover la construcción de la escritura en los niños y niñas en educación inicial vinculados al programa Ondas de la Institución Educativa Técnico Alfonso López sede la Concordia

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    Maestría en Educación desde la Diversidad, Facultad de Ciencias Sociales y Humanas.La producción escrita se considera una habilidad lingüística compleja que contempla en la construcción de palabras los siguientes niveles del lenguaje: presilábico, silábico, silábico-alfabético y alfabético. En el ámbito educativo, esta destreza es esencial para el fortalecimiento de las competencias comunicativas. El presente trabajo investigativo de tipo cuantitativo, con diseño pre experimental, busca determinar la efectividad de una estrategia pedagógica basada en el teatro y el dibujo para promover la construcción de la escritura; la población objeto es de 20 estudiantes de educación inicial de la Institución Educativa Técnico Alfonso López (sede Concordia de La Dorada, Caldas), vinculados al programa Ondas de Colciencias. Para conseguir el propósito, se aplicó un pre-test con la finalidad de conocer el nivel de escritura que poseían los estudiantes. Así mismo, se estructuró y desarrolló una estrategia pedagógica basada en el teatro y el dibujo con el objetivo de acrecentar habilidades escriturales enfocadas en las cuatro actividades rectoras, destacando en ellas, habilidades para la literatura, el juego, el arte y la exploración del medio. Finalmente, se usó un pos-test para determinar el proceso evolutivo de construcción de la escritura. El tratamiento estadístico de resultados se analizó con la utilización del programa SPSS. La investigación comprobó que la estrategia propuesta impulsa el tránsito por los niveles de construcción de la escritura de los estudiantes, la cual incrementó de 0 % al 100 % en la escala de niveles de escritura clasificada así por Emilia Ferreiro y Ana Teberosky. La adquisición de esas habilidades permitió a los niños avanzar en la apropiación de elementos básicos y herramientas necesarias para iniciar el proceso de la escritura

    Large genomic introgression blocks of Phaseolus parvifolius Freytag bean into the common bean enhance the crossability between tepary and common beans

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    The production of the common bean (Phaseolus vulgaris L.), one of the most important sources of protein and minerals and one of the most consumed grain legumes globally, is highly affected by heat and drought constraints. In contrast, the tepary bean (Phaseolus acutifolius A. Gray), a common bean-related species, is adapted to hot and dry climates. Hybridization to introduce complex traits from the tepary bean into the common bean has been challenging, as embryo rescue is required. In this study, we report three novel interspecific lines that were obtained by crossing lines from prior common bean tepary bean hybridization with Phaseolus parvifolius Frey tag in order to increase the male gametic diversity to facilitate interspecific crosses. These interspecific lines enhanced the crossability of the common bean and tepary bean species while avoiding the embryo rescue process. Crossing these three interspecific lines with tepary beans resulted in 12-fold more hybrid plants than crossing traditional common beans with tepary beans. Whole-genome sequencing analysis of these three interspecific lines shows large introgressions of genomic regions corresponding to P. parvifolius on chromosomes that presumably contribute to reproductive barriers between both species. The development of these lines opens up the possibility of increasing the introgression of desirable tepary bean traits into the common bean to address constraints driven by climate change

    Remote Data Retrieval for Bioinformatics Applications: An Agent Migration Approach

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    Some of the approaches have been developed to retrieve data automatically from one or multiple remote biological data sources. However, most of them require researchers to remain online and wait for returned results. The latter not only requires highly available network connection, but also may cause the network overload. Moreover, so far none of the existing approaches has been designed to address the following problems when retrieving the remote data in a mobile network environment: (1) the resources of mobile devices are limited; (2) network connection is relatively of low quality; and (3) mobile users are not always online. To address the aforementioned problems, we integrate an agent migration approach with a multi-agent system to overcome the high latency or limited bandwidth problem by moving their computations to the required resources or services. More importantly, the approach is fit for the mobile computing environments. Presented in this paper are also the system architecture, the migration strategy, as well as the security authentication of agent migration. As a demonstration, the remote data retrieval from GenBank was used to illustrate the feasibility of the proposed approach

    Postoperative differences between colonization and infection after pediatric cardiac surgery-a propensity matched analysis

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    BACKGROUND: The objective of this study was to identify the postoperative risk factors associated with the conversion of colonization to postoperative infection in pediatric patients undergoing cardiac surgery. METHODS: Following approval from the Institutional Review Board, patient demographics, co-morbidities, surgery details, transfusion requirements, inotropic infusions, laboratory parameters and positive microbial results were recorded during the hospital stay, and the patients were divided into two groups: patients with clinical signs of infection and patients with only positive cultures but without infection during the postoperative period. Using propensity scores, 141 patients with infection were matched to 141 patients with positive microbial cultures but without signs of infection. Our database consisted of 1665 consecutive pediatric patients who underwent cardiac surgery between January 2004 and December 2008 at a single center. The association between the patient group with infection and the group with colonization was analyzed after propensity score matching of the perioperative variables. RESULTS: 179 patients (9.3%) had infection, and 253 patients (15.2%) had colonization. The occurrence of Gram-positive species was significantly greater in the colonization group (p=0.004). The C-reactive protein levels on the first and second postoperative days were significantly greater in the infection group (p=0.02 and p=0.05, respectively). The sum of all the positive cultures obtained during the postoperative period was greater in the infection group compared to the colonization group (p=0.02). The length of the intensive care unit stay (p<0.001) was significantly longer in the infection group compared to the control group. CONCLUSIONS: Based on our results, we uncovered independent relationships between the conversion of colonization to infection regarding positive S. aureus and bloodstream results, as well as significant differences between the two groups regarding postoperative C-reactive protein levels and white blood cell counts
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