Examinando por Autor "S."

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    Cooperation in coffee markets: The case of Vietnam and Colombia
    (Emerald Group Publishing Ltd., 2012-01-01) Gonzalez-Perez; M.-A.; Gutierrez-Viana; S.
    Purpose - The purpose of this paper is to present a cross-country study comparing Colombia and Vietnam, two of the major coffee exporting countries in the world, in terms of their infrastructures, the roles of external shocks, technology adoption at different stages of production, added value, positioning in both domestic and global markets, internationalisation patterns, marketing and branding innovations, regulatory frameworks, and policy environments. This study also explores other aspects linked to production, and marketing strategies that open niche markets such as speciality coffees, and socially-, labour- and environmentally-responsible trade. Furthermore, it identifies opportunities of cooperation and competition between these two countries. Design/methodology/approach - Using value chain analysis as primary research method, this paper identifies links and dynamics in the value chains that have been developed in the coffee industry in both countries to improve competitiveness, increase sustainability, and respond to market demands. Findings - Using value chain analysis, it was found that Colombia and Vietnam produce different types of coffee, and that both have implemented diverse strategies in order to be more competitive in domestic and foreign markets via product differentiation. These differences make explicit room for cooperation between these two countries in an international environment where fierce competition persists. Originality/value - Cooperation between producing countries is an under-researched subject. These findings will be useful both for policy makers in coffee-producing countries and agribusiness researchers. © Emerald Group Publishing Limited.
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    Herramienta académica para distribución del almacén según el pick density
    (Universidad de Los Andes, 2010-07-23) Arrieta-Posada; Juan Gregorio; Carmona; Guillermo Leon; Rodriguez; D.C.; Ruíz; S.; Universidad EAFIT. Departamento de Ingeniería de Producción; Gestión de Producción y Logística
    La distribución de los artículos en el almacén tiene un alto impacto en los costos logísticos de las empresas. Existen diferentes estrategias de distribución para un almacén
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    Interpolating spatially varying soil property values from sparse data for facilitating characteristic value selection
    (Canadian Science Publishing, 2018-02-01) Zhao; T.; Montoya-Noguera; S.; Phoon; K.-K.; Wang; Y.; Mecánica Aplicada
    Limit state design, incorporated into many recent geotechnical design codes, introduces the application of partial or resistance factors to selected characteristic values. Partial or resistance factors are usually set by national standard organizations, while characteristic values of geotechnical parameters are selected by engineers, often based on sparse measurement data combined with subjective engineering experience and judgment. Due to this subjective selection and individual judgment, the characteristic value derived by different engineers from the same dataset may vary greatly, especially when the test data contain significant variability. To address this issue, a new method based on Bayesian compressive sampling (BCS) is proposed in this study. BCS is able to reconstruct a high-resolution geotechnical property profile from sparse measurement data and quantify the uncertainty, e.g., confidence interval (CI) associated with the interpreted profile. The quantified uncertainty in the BCS has a clear statistical meaning: the corresponding confidence level for a CI from the BCS is the expected coverage proportion (i.e., fraction) of the complete profile that falls within the CI, if all data points along depth can be measured to provide the complete profile. This statistical meaning can be used to facilitate objective determination of characteristic values for geotechnical properties.