Examinando por Materia "Productivity"

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    Improving construction material and equipment logistics via simulation
    (Universidad del Valle, 2015-06-19) Gomez Cabrera, Adriana; Granados Castillo, María A.; Pérez Cendales, Ivonne K.
    (Eng) In this work, an analysis of the logistics processes of transport, distribution and storage of materials in foundation and structure activities of two reinforced concrete buildings located in the city of Bogotá D.C., in order to propose improvements in processes and increase productivity. The above is developed by performing discrete event simulation models. The work was carried out in three phases, in the first, the construction processes were characterized and a field work based on taking data, photos and videos; In the second stage, the simulation models were carried out for the real scenario, identified deficiencies and opportunities for improvement with which different theoretical scenarios were proposed, the which were compared in the third phase of the investigation. From the analysis of the results obtained, concluded that the simulation of discrete events allows observing the integration and behavior of the variables that intervene in the process, thus achieving, identifying shortcomings and proposing improvements with which the best scenario considering the cost-benefit ratio
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    Magnetic treatment of irrigation water and seeds in agriculture
    (Universidad del Valle, 2016-07-08) Zúñiga, Orlando; Benavides, Jhony A.; Ospina Salazar, Daniel I.; Jiménez, Cristian O.; Gutiérrez, Mauricio A.
    (Eng) The aim of this review article is to expose the advantages of magnetic treatments in agriculture, and to identify the gaps that prevent their spread and/or complementary use to traditional practices. A comprehensive literature review of the last eighty years was carried out on the databases of agricultural sciences and basic sciences, using the descriptors water-physicochemical properties, bio-magnetism, crop production, and magnetic treatments. The magnetically treated water exhibits various phenomena at the molecular level, which are thought to have direct and indirect effects on growth and productivity of crops, related with a greater efficiency in irrigation and water use, modification of soil moisture profile and an optimal nutrient availability therein. Similarly, magnetic fields applied to seeds stimulate the seed germination, vigor, and plant growth rate, which influences the final net production and yield. Despite this, there is a lack of a standardized magnetic treatment for water and seeds, due to the many different methodologies evaluated in each study. However, there are already some patented available devices in the market. The technology of magnetic treatments for seeds and irrigation water has positive effects on plant productivity, it is easy to apply and have less impact on the environment compared to other practices. Moreover, an accurate modeling of the interactions between magnetic fields, water, and seed and plant physiological processes could lead to a standardization of this technique, which remedy the existing methodological gaps at this level.
  • Miniatura
    PublicaciónAcceso abierto
    Theoretical understanding between competitiveness and productivity: firm level
    (Universidad del Valle, 2018-07-19) Dresch, Aline; Collatto, Dalila Cisco; Lacerda, Daniel Pacheco
    (Eng) The objective of this article is to contribute to the understanding of the concept of competitiveness at firm level and its relation to productivity. To support the objective of this work, a systematic review of the literature was conducted and was subsequently structured an analysis of the elements found in the literature through systems thinking. Systems thinking enables to identify the cause and effect between the elements of competitiveness, highlighting the convergence and divergence between these elements. It was concluded that productivity stood out among the other elements confirming its importance in determining firm competitiveness. Limitations of this study consists on the theoretical nature, there is the need for an empirical study to verify the practical effect of productivity on competitiveness at the firm level.