Browsing by Autor "Gerardo Ceballos"

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    Herramienta de visualización y procesamiento de señales electroforéticas desarrollada usando software libre
    (2007) Jhosmary Cuadros; L Q José Paredes; Gerardo Ceballos; Dhionel Díaz
    In this work, we developed a new software tool for signal processing and analysis of capillary electrophoresis (CE) data. The proposed tool has been developed under the paradigm of free software and open source, using wxWidget as the visualization tool, providing thus a user-friendly interface and easy to use tool that fully meets informatics requirements of researchers with the need of performing CE data analysis. To achieve that, the proposed tool has several options for signal processing and visualization, integrated into various tabs, pull down option menus, a fast access toolbar, and selectable graphical areas where the user can show the raw data, and the processed data. Furthermore, the proposed tool has an on-line user manual, made using multimedia techniques, describing its operation in details. The developed tool is based on structured programming facilitating thus software maintenance as well as the integration of third-party applications that may further improve or expand the potential of the present tool. In order to validate the proposed tool, the algorithms were also implemented using licensed software, specifically MatLab®, and a comparative study of the performance of both developments is also presented. Finally, the application runs on window based or Linux/Unix platforms with reduced computer resources.
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    MANGE EPIZOOTIC IN WHITE-NOSED COATIS IN WESTERN MEXICO
    (Wildlife Disease Association, 2000) David Valenzuela; Gerardo Ceballos; Andrés García
    From November of 1994 to June of 1996 an epizootic of mange, probably caused by the mite Notoedres cati, occurred in white-nosed coatis (Nasua narica) in the tropical dry forests of the Chamela-Cuixmala Biosphere Reserve in western Mexico. A monitoring scheme to determine the extent and severity of the epizootic within coatis was implemented. Trapping periods and transects were conducted for 2 yr. To control the spread of the disease, all captured infected coatis were either euthanized or treated with acaricides such as Butox and Ivomec-F, depending on the severity of their infection. Four other species of wild mammals and feral cats had skin conditions resembling mange. A more severe problem with the disease was predicted and later confirmed in the less isolated areas of the reserve, with a higher density of coatis. Our results indicate that epizootics may be more prone to occur in areas with greater fragmentation and less isolation from anthropogenic influence. Interestingly, although there was an apparently severe impact of the mange epizootic in the coati population, the long-term impact of the disease is unknown but appears to be negligible. So in order to understand the role of diseases in wildlife populations, long-term experimental studies are required.