Browsing by Author "Luna, Ana"

Now showing 1 - 5 of 5

Alternative setup for estimating reliable frequency values in a ripple tank
(Universidad del Pacífico. Centro de Investigación, 2017-01) Luna, Ana; Núñez del Prado, Miguel; Luján, José; Mantilla García, Luis; Malca, Daniel
In this paper, we introduce an innovative, low-cost and easy experimental setup to be used in a traditional ripple tank when a frequency generator is unavailable. This configuration was carried out by undergraduate students. The current project allowed them to experiment and to study the relationship between the wavelength and the oscillation period of a mechanical wave, among other things. Under this setup, students could evaluate the mechanism not only qualitative but also in a quantitative fashion with a high degree of confidence. The results obtained for the propagation speed of the mechanical waves in different media with this alternative design coincided with those acquired using a commercial device designed for this purpose.
DAZIO: detecting activity zones based on input/output call and SMS activity
(Universidad del Pacífico. Centro de Investigación, 2016) Núñez del Prado, Miguel; Luna, Ana; Gauthier, Romain
Mobile telecoms operators possess an enormous quantity of data, which could be used to reduce the cost of installing new infrastructure, to provide a better QoS or to plan their infrastructure. Thus, they are concerned to model, understand and predict SMS and calls activity levels in their infrastructures. Besides, SMS and call activities analysis can open new business opportunities for geomarketing as well as trade area analysis. In the present effort, we detected activity zones with a difference of only 0.5 km from the reference activity areas extracted from Geo-tweets. We also used Markov chains to represent and predict SMS and call activity levels, achieving a prediction success rate between 80% and 90%.
Fresh product supply chain analysis in Cauca, Colombia — A hass avocado system dynamics approach
(MDPI, 2023-01) Anacona Mopan, Yesid Ediver; Rubiano-Ovalle, Oscar; Paz, Helmer; Solis Pino, Andrés Felipe; Chong, Mario; Luna, Ana
In recent years, agriculture has become an essential activity in Colombia, despite the challenges faced by farmers due to low yields and insufficient resources to improve their main activities, such as irrigation systems, agricultural practices, and industrial machinery. This Hass avocado approach has been addressed in previous research considering system dynamics simulation to evaluate farmers’ behavior strategies and improve their competitiveness. However, these studies typically examine a single strategy effect and avoid multiple integrated strategies. Other studies focused on the complex interactions between different factors in the production chain and their feedback effects on farmers’ productivity and cash flow. For these reasons, this research provides a comprehensively dynamic model and evaluates long-term strategies and their effects on supporting and improving small farmers’ productivity and profitability. A system dynamics methodology was used to model complex systems processing Hass avocado farmer association data and explore their effects on competitiveness for long-term sustainable and profitable agriculture. This research proposes optimal scenarios for small farmers, including strategies such as low-interest credit access, logistics practices, and government technical support. The scenarios provide a proactive tool for decision makers and promote rural farmers’ development, aligning high-quality fresh product supply and demand.
Public policy on agricultural projects assessing the impact: a Hass avocado crop system dynamics applied valuation
(MDPI, 2024-06) Anacona Mopan, Yesid Ediver; Rubiano-Ovalle, Oscar; Paz, Helmer; Luna, Ana; Solis Pino, Andrés Felipe; Chong, Mario
Colombia has positioned itself as a significant actor in Hass avocado production, capitalizing on the rising global demand and its suitable climate for the crop. These conditions have led to considerable investments from farmers. In this business environment, this research presents a systematic simulation and methodological approach for the evaluation of crops focusing on the Hass avocado and its extension to small-scale producers in Colombia. The initial phase involved a comprehensive analysis of key variables in the Hass avocado production chain, assessing productivity and viability. Subsequently, a dynamic model was developed to explore four scenarios spanning 13 years. The first scenario evaluated the production chain’s current behavior, while the second scrutinized the impact of credit accessibility. The third scenario analyzed the associativity among producers’ effects, and the fourth assessed the impact of government support. The results underscore that the implementation of each strategy improves the economic returns. Integrating all three strategies is the most effective method. These scenarios serve as proactive tools for investors, equipping them valuable insights and enabling informed decisions. Moreover, the study advocates for the promotion of rural economic development through strategic agricultural interventions.
Uso de sensores electroquímicos de bajo costo para el monitoreo de la calidad del aire en el distrito de San Isidro - Lima - Perú
(Universidad del Pacífico. Centro de Investigación, 2017) Luna, Ana; Talavera, Álvaro; Cano, Luis
En este trabajo se muestran los resultados preliminares del monitoreo y de la estimación de contaminantes atmosféricos en un punto estratégico dentro del distrito de San Isidro, Lima - Perú. Se emplearon sensores electroquímicos de bajo costo, portátiles, inalámbricos y geolocalizables para la captura de los niveles de contaminación que permiten obtener en tiempo real valores confiables que podrían emplearse no sólo para cuantificar la exposición de contaminación atmosférica sino también para prevención y control, e incluso para fines legislativos. Para la previsión de los niveles de CO2 y de SO2 se aplicaron algoritmos de inteligencia computacional, específicamente redes neuronales.