Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

This paper reports the design of a deep neural network (DNN) focused to predict patterns of student dropout at the UPTC University of Colombia. We apply specialized artificial intelligence (AI) algorithms for the implementation of the DNN specifically were using a learning machine for classification and clustering task. Additionally, a dataset containing 17 attributes of 3000 academically active students was structured; the data set has been prepared to be trained as an entry to the neural network. The final result of the research reveals a predictive model trained through the DNN validated by several quality metrics that demonstrate reliability and accuracy of the results accomplished through the model.

Objetive: The effects of global climate change are reflected in the affectation of the regime of the different climatic variables, producing impacts on the ecosystem services of hydrographic basins that, in the national context, have not been evaluated to date. Many of the water supply basins in the country are born in the páramo that are importante from the point of view of provition of the ecosystem services of provision and water regulation, since these sustain biodiversity and the development of different socio-economic activities. The study analyzed the impact on the water provision and regulation services of the Teatinos river basin of the Rabanal páramo due to the change in land cover, as a result of the effect of global climate change. Metodology: the study was carried out by constructing the multi-temporal distributor hydro-climatic balance, integrating climate studies with remote sensing tools. Results: It was found that in recent decades there is no evidence of an alteration in the average values ​​of the water supply due to the apparent resilience mechanism of the basin in the face of external forcing forces, while the water regulation service faces an important temporary product of rainfall and land cover change in the hydrographic basin. Conclusions: The results obtained make it posible to conclude on the effect of climate change on different components of the water balance and ecosystem services of hydrographic basins.

Objetivo: Este trabajo presenta una selección detallada de tecnologías IoT para el diseño de una infraestructura de monitoreo de humedad ambiental para el control del riego de cultivos. Metodología: El diseño del prototipo se apoyó en estudios previos realizados por los autores y en pruebas realizadas en 2019 en la Finca el Porvenir en Cundinamarca, Colombia, con el fin de determinar la mejor opción para implementar en campo mediante el uso del software Python, y elementos como la Raspberry Pi y la placa de desarrollo TTGO. Resultados: iPara determinar la funcionalidad del software y el hardware del sistema, se realizaron diferentes pruebas estáticas del prototipo a través del monitoreo de humedad y temperatura ambiente por medio del sensor DHT22, cuya información es enviada desde un nodo transmisor a un nodo receptor en un concentrador para, posteriormente, guardar la información en una base de datos y, finalmente, obtener las gráficas del comportamiento de la humedad relativa, la temperatura, y el accionamiento del elemento de control (válvula solenoide). Conclusiones: Con esta información es posible demostrar la efectividad del prototipo, la posibilidad de conexión remota con el protocolo LoRa y el manejo y gestión de la información de diferentes zonas de cultivo a través de la GUI en la Raspberry Pi, generando una solución de bajo costo para el acceso de pequeños y medianos productores en zonas rurales de Colombia.

Objective: This research work proposes and evaluates a model for the provision of physical rehabilitation services supported by teleoperated technological aids, using the Internet as a communication channel for the care of the rural population, and by taking as the study region, a western subregion of Colombia around the municipality of Santiago de Cali- Colombia. Methodology: From the dynamics generated by the interaction between the service system and the users, characterized by the occurrence of events, a formal model was built, using a Colored Petri Net. To do this, a modelling methodology based on a top-down approach was proposed. Results: A model of the care system was developed and evaluated using Petri nets, based on a case study consisting of the current care model offered by a typical health service provider in Cali called "La Ladera ESE Health Network". The weighted improvements through the proposed system were: greater objectivity of traceability, speed of communication, better quality of rehabilitation, as well as the ability of the new system to contribute to greater precision in the initial diagnosis and subsequent periodic evaluation of recovery. Conclusions: The proposed protocol based on the model made it possible to attend concurrently and accurately diagnose up to three patients, through the implementation of technological aids to improve diagnostic support and allow a subsequent periodic evaluation of the patient´s recovery.

Summary: This work provides a methodology to analyze user preferences regarding the components that a judicial search engine should include. We validate this methodology by developing a search system. Starting from initial characteristics, we designed a search prototype. A test was then applied to identify whether the search engine meets the user's needs. The prototype developed was compared to other next-generation search engines in terms of user satisfaction and accuracy. The results show that our proposal outperforms other search engines. Objective: Define and implement the components for the development of a judicial search engine. Methodology: The methodology consists of in: Definition: Includes a review of the state of the art of the technologies associated with the project. Prototype development: Different modules and components of the system are developed here. Evaluation: focused on usability and user satisfaction. Results: The characteristics and elements necessary for the search engine were identified. To this end, Benchmarking on general aspects and components of jurisprudence search engines was carried out. Additionally, a survey was conducted with 79 legal experts. Finally, a use test was carried out. Conclusions: A prototype of the search engine was designed according to the characteristics declared by the users. This prototype showed optimal usability and navigation because it was designed considering the needs of the user's jurisprudence. Its interfaces are easy to understand and its filters make the search process more agile and precise. Finally, the developed search engine offers a good experience to the users.

Objective: Environmental environmental diagnosis of the Complejo Cenagoso Santiago Apóstol CCSA including the Arroyo Grande de Corozal, located in the Sucre state, determining the main anthropogenic pressures that impact the quality of the water resource and the ecosystem. Methodology: An analysis of the characteristics of the complex was carried out and the perception of the surrounding communities was evaluated. In addition, physicochemical and microbiological parameters were evaluated, and the IMPRESS methodology was applied to identify the pressures and impact on these water bodies. Results: Discharges related mainly to livestock and agro-industrial activities, as well as water of domestic origin, were identified. The lack of water treatment plants has an impact on the CCSA and this is reflected in the high presence of total coliforms, BOD and dissolved solids, mainly in the AGC. In addition, the population perceives these bodies of water as a high value asset, but they consider that they do not have an impact. The impacts and the definition of the risk of the pressures on the bodies of water of interest gave the main pressures to the point sources, morphological alterations and land use, having a proven impact and representing a high risk. Conclusions: The management of water resources, the implementation of treatment plants and the use of biotechnological alternatives such as phycoremediation would be of the utmost importance to reduce contamination factors and preserve the CCSA. In addition, it is necessary to promote a culture and awareness of conservation and protection of these bodies of water.

Objective: To show the results obtained from impedance spectroscopy tests performed on FBE coatings and the liquids used in pipelines internally coated that carry highly corrosive fluids in the oil industry. Methodology: This study is carried out by laboratory tests with Gamry 3000 equipment and prototype equipment, measuring pieces of test tubes coated with Resicoat HMH09QF epoxy resin powder and SigmaShield 1200 liquid coating. These pieces are subject to welding processes that generated different failures such as blisters, cracks, fissures, and burns.  They are the object of analysis and measurement of impedances to achieve a characterization and determination of values to classify these problems minimizing and correcting them, to avoid accidents caused by leaks due to high corrosion failures in the pipes’ processes, mitigating the environmental impact. Results:  The tests carried out on the coated pieces evidence that failures such as coating burns or detaches from the pipeline, the impedances are in the order of x104 and x105.  On the contrary, in the coating cases without failures, the impedances are x109 and higher. The intermediate failures such as cracks and blisters in intermediate values are in the order of x108. Conclusion: The study allowed the characterization of different failures in the internal pipeline coatings that appear in weld joints. It was possible to obtain impedance values for each coating failure, and finally, it was possible to associate them into ranges according to their problems and coating failures. 

Objective: This article seeks to emphasize the importance of giving adequate and timely management to the waste and waste generated by the IPS in the region. Methodology or method: A descriptive study will be carried out and a questionnaire will be applied to 20 selected IPS, aspects related to the management situation and risks related to hospital waste and similar will be evaluated. Results: It was fundamentally possible to establish the groups of activity or service of the selected IPS, to identify that only 45% of the IPS have a PGIRHS updated and adjusted to the norm, only 30% have elements for the management and final disposal and the same percentage performs training programs for the parties involved. Conclusions: To improve the awareness and commitment on the part of the PHI regarding hospital waste management, it is necessary to promote training, as well as control and monitoring activities that allow the protocols in each entity to be in place.

Objective: To carry out a study on the responsibility in a stone aggregates mine in Riohacha, Colombia. Methodology: An explanatory descriptive approach with a non-experimental type design was used. The population is made up of an administrative manager and 24 workers from the productive area in the mine. For the collection of information, field visits were necessary; In a complementary way, an instrument was applied, divided into 2 dimensions and 7 indicators focused on aspects pertinent to environmental responsibility. For the validity and reliability of the study, criteria of experts in environmental matters were used. Results: It was obtained as a result that the company dedicated to the exploitation of stone aggregates is governed by environmental regulations and applies measures of environmental responsibility within which the minimization of water use and reforestation stand out; In other words, the company focuses its efforts on the search for environmental responsibility. Conclusions: Environmental responsibility within the mining company contributes to sustainable development and, hand in hand with environmental regulations, guarantees an adequate exploitation of natural resources.

Objective: To evaluate the different quality dimensions of a pasta company's production. Method: The investigation was of evaluative cut with application of the concepts and related theories of Six Sigma, 12 periods of studies were considered, to the productive process the metrics of six sigma were applied to him associated to the defects in parts by million (DPMO), yield and the level sigma Z. Results: The results of this investigation allowed to evaluate the performance of the productive stages of the process obtaining a global average of the 12 periods of the performance Y of 96,89 % and a level sigma average Z of the stages of the process of 3,67 Discussion: What evidences that the productive system analyzed has a good performance and the criteria of quality of the productive process fulfill the demands of control of the productive system of edible pastas for the clients Conclusions: As a unique contribution, a structured method is provided that allows the evaluation of a food production system in a global and punctual way by means of the six sigma metrics.