. In this research work, we have collaborated with a company with a local presence dedicated to the sale and distribution of auto parts. The main prob-lem is the lack of an optimized system of distribution to customers, which is capable of accelerating the delivery process. Particularly in this work, we have developed a method to calculate the correct clustering of customers by areas considering the density and volume of order. The result is a classification and assignment of a zone to each customer by the method of k-medoid considering two measures of performance of the literature are shown.
Authors: Leonardo Hernández-Landa (Universidad Autónoma de Nuevo León), Rosa Mata-Martínez (Universidad Autónoma de Nuevo León), Argelia Vargas-Moreno (Universidad Autónoma de Nuevo León), Arlethe Aguilar-Villareal (Universidad Autónoma de Nuevo León),
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Faced with the need to bet on cleaner production processes, the Government of Mexico, in conjunction with various international cooperation agencies, have made efforts to grant financing under preferential conditions for small and medium-sized enterprises (SMEs), which are the backbone of the Mexican economy, to implement sustainable projects that promote the reduction of energy consumption. However, these efforts have not had the expected results since the viability of the loans is determined by the Financial Institutions (FIs) based solely on the profitability analysis of the SMEs. If this analysis is complemented with the consideration of environmental and social aspects, a greater number of projects would be viable. Real Options method allows the calculation of future cash flows incorporating the uncertainty from the volatility associated with the projects, allowing future modifications to be made to them based on their performance. In addition, under the economic cost-effectiveness analysis, costs incurred in the implemented projects are compared against the results, assigning a monetary value to them to determine their true impact. In the case study carried out, the result was that the guide provides qualitative information of acceptable quality to determine the viability of a sustainable project in an SME.
Authors: Luz Maria Adriana Reyes Ortega (Universidad Anáhuac), Roman Rodriguez Aguilar (Universidad Panamericana),
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This paper focuses on the supplier selection in a humanitarian relief chain. Considering the negative impact that natural disasters, the procurement costs could be a challenging issue for humanitarian organizations (HO). Post-disaster procurement usually carry large costs due to the haste of the situa-tion in the first or the extensive administration in the latter. This work ana-lyzes supplier selection tools proposed in the literature and focuses primar-ily on the final decision stage where an organization optimizes the purchase of items from a supplier base. We propose a scenario-based two-stage stochastic programming model for a statutory agency; it considers a limited budget and the procurement from a higher-level source. We also consider framework agreements (FA’s) where the buyer commits to purchase some capacity reserved from the supplier during a given period of time, thus, better prices could be negotiated and help the organization lower their costs. The proposed model delivers an optimal solution for a statutory agency and helps in the decision-making process as to what candidate suppliers are desirable to establish a framework agreement with. The solution shows im-portant information as to what percentage of demand is covered from the se-lected suppliers. Limited funding in HO's is an important factor for decision-making. The model incorporates a budget constraint and delivers information about the amount of relief items to procure form a higher-level source.
Authors: Juan Mejia-Miranda (Universidad Autonoma de Nuevo Leon), Jania Saucedo-Martínez (Universidad Autónoma de Nuevo León),
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La degradación ambiental, el riesgo de colapso ecológico, la desigualdad social y la pobreza extrema, son características del mundo “moderno”. Los problemas ambientales han aumentado considerablemente, desde la contaminación local hasta la deforestación regional e internacional y otras formas de agotamiento y degradación de los recursos naturales. Ahora sabemos que las actividades humanas ocurren en el contexto de la relación entre sociedad y medio ambiente, sin embargo, el “desarrollo” implica grandes transformaciones en esta relación
Authors: Alberto Ochoa-Zezatti (Universidad Autónoma de Ciudad Juarez), OLIVERIO CRUZ-MEJIA (Universidad Autonoma del Estado de Mexico), José Mejia (Universidad Autónoma de de Ciudad Juárez), Hazael Ceron-Monroy (Universidad Anáhuac México),
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Having good suppliers not only means having quality inputs, it is also the possibility of having low costs. Suppliers play a fundamental role in the process from the acquisition of raw materials and even in the design and innovation of products. The purpose of this article is to propose a methodology for the suppliers’ analysis and selection in order to improve the performance of the supply chain, that includes various aspects that take into account the diversity and complexity of the situations that may arise in the purchasing process and that covers all the phases in the supplier selection process. Recommendations: The proposed methodology can be applicable to any organization. For its implementation, each organization must define its objective, criteria and limitations correctly, because the correct choice of the selection method and the quality of the process will largely depend on this. The article gives professionals flexibility and effectiveness in the suppliers’ selection and their selection process, and with a better understanding of their future purchasing strategies. The fundamental findings of this research focus specifically on the determination and analysis of the main quantitative methods used in the supplier’s selection. The proposed model can help managers involved in the purchasing function to effectively select suppliers based on the identified criteria and business objectives.
Authors: Inaivis Ibañez Delgado (Universidad Autónoma de Nuevo León), Tomás Salais Fierro (Universidad Autónoma de Nuevo León), Jania Saucedo Martínez (Universidad Autónoma de Nuevo León),
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The aim of this paper is to analyze the feasibility of establishing a supply chain for castor oil biodiesel distribution in Central Mexico, based on the distribution of land with the highest castor oil seed yield potential. The supply chain analysis is focused on meeting the biodiesel demand for the region, assuming a B20 mix us-age, from the proposed plantation sites to refineries and gas stations, using Net-work Optimization, and defining the required biodiesel production increase to achieve this.
Authors: Marcelo Galas (Universidad Anáhuac México),
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This paper presents a proposal for the Hub location for medical care during epidemic outbreaks. A problem of coverage of medical services that offers a radius of medical attention to the population is analyzed. Two criteria are shown for the location of health services. Finally, based on public health policy recommendations, the solution is proposed for a hypothetical case.
Authors: José Antonio Marmolejo-Saucedo (Universidad Panamericana), JORGE LUIS ROJAS ARCE (Universidad Nacional Autonoma de Mexico),
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The recent COVID-19 pandemic has represented a great challenge for health systems around the world. In the case of Mexico, the impact of the pandemic has placed it in third place in deaths worldwide. That is why it is necessary to propose strategies for prioritizing care and containing the pandemic. This work proposes the use of spectral clustering to characterize high-priority areas of care based on key information on the performance of the pandemic as well as sociodemographic variables and the health system. The result shows the generation of high priority areas not only due to the deaths observed but also due to the clinical, demographic and health infrastructure profile.
Authors: Roman Rodriguez-Aguilar (Facultad de Ciencias Económicas y Empresariales, Universidad Panamericana, Augusto Rodin 498, Ciudad de Mexico 03920, Mexico),
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This project leads through the implementation of Lean Six Sigma (LSS) at two Surgical Units (SU) of the National Rehabilitation Institute (INR), a public high specialty Mexican hospital, to analyze and identify the main causes that produces failures in Medical Devices (MDs) during surgery. We applied the first three stages DMAIC methodology and LSS tools to achieve it. In the Define stage, the problematic was described. In the following stage, Measure, waste was identified on the work routine of the Biomedical Engineer (BE), who is part of the Biomed-ical Engineering Department (BED), with a Value Stream Map (VSM). In the fi-nal stage, Analyze, the causes of the principal ideas provided in the previous steps were determined. We identified the strongest factors that affect the processes involved in the elimination of mistakes or failures with MDs and waste. We studied these factors to understand their principal causes, in order to analyze them. Finally, we identified the main causes that produce MD failures during routine surgeries in the two SUs.
Authors: Ana Paula Yañez Brand (Universidad Nacional Autónoma de México), Zaida Alarcón-Bernal (Universidad Nacional Autónoma de México), Javier Pérez-Orive (Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra), Eloy Hernández-Lorenzo (Instituto Nacional de Rehabilitación Luis Guillermo Ibarra Ibarra),
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In this paper, we present an improvement of the Gray Wolf algorithm (GWO) based on a multi-threaded implementation of the original algorithm. The paper demonstrates how to combine the solutions obtained in each of the threads to achieve a nal solution closer to the absolute minimum or even equal to it. To properly combine the solutions of each of the threads of execution, we use strategies based on simulated annealing and genetic algorithms. Also, we show the results obtained for twenty-nine functions: unimodal, multimodal, xed dimension and composite functions. Experiments show that our proposed improves the results of the original algorithm.
Authors: Felix Martinez-Rios (Universidad Panamericana), Alfonso Murillo-Suarez (Universidad Panamericana), Cesar Raul Garcia-Jacas (CICESE), Juan Guerrer- Valadez (Universidad Panamericana),
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This paper explores the usability of the Ripley's K function and the nearest neighbor distance, in the detection of clustered graphical passwords in the graphical authentication stage. For it, both tests were applied to two bases of data of $10 000$ clustered graphical passwords each, the first with graphical passwords clustered in an area lesser than the fourth part of the original image, the second clustered in an area lesser than eighth part of the image. The results show that none of these tests is effective in the detection of clustered graphical passwords, the reason of such failure is due to the short size of the spatial pattern in question, only the 5 points of the graphical password analyzed.
Authors: Joaquín Herrera-Macías (Universidad de Matanzas, Departamento de Matemática, Matanzas, Cuba), Lisset Suárez-Plasencia (Universidad de Artemisa, Departamento de Matemática-Física, Artemisa, Cuba), Carlos Legón-Pérez (Universidad de la Habana, Facultad de Matemática y Computación, Instituto de Criptografía, Habana, Cuba), Luis Piñeiro-Díaz (Universidad de la Habana, Facultad de Matemática y Computación, Instituto de Criptografía, Habana, Cuba), Omar Rojas (Universidad Panamericana. Facultad de Ciencias Económicas y Empresariales. Álvaro del Portillo 49, Zapopan, Jalisco, 45010, México), Guillermo Sosa-Gómez (Universidad Panamericana. Facultad de Ciencias Económicas y Empresariales. Álvaro del Portillo 49, Zapopan, Jalisco, 45010, México),
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The probabilistic distribution of the characteristics of Voronoi polygons has been extensively studied due to its many areas of application. In various works that differ in the number of polygons generated and in the size of their regions, it is concluded that the expected value of the characteristic number of sides of Voronoi polygons is equal to 6. In this work, this characteristic in the polygons generated by the graphical passwords of the graphical authentication system PassPoint is studied. Its distribution is estimated and it is shown that the expected value of the number of sides of the Voronoi polygons in this scenario differs from previous works. The effectiveness of this feature is evaluated to detect weak graphical passwords made up of grouped dots. They are to be detected by estimating the entropy of the number of sides and by the expected value of the number of sides. It is concluded that the distribution of the number of sides in this scenario does not fit any previously known distribution and that the entropy and the expected value of the number of sides are not efficient for the detection of weak graphical passwords of PassPoint formed by 5 grouped points.
Authors: Lisset Suárez-Plasencia (Universidad de Artemisa, Departamento de Matemática-Física, Artemisa, Cuba), Joaquín Herrera-Macías (Universidad de Matanzas, Departamento de Matemática, Matanzas, Cuba), Carlos Legón-Pérez (Universidad de la Habana, Facultad de Matemática y Computación, Instituto de Criptografía, Habana, Cuba), Raisa Socorro-Llanes (Universidad Tecnológica de la Habana, Facultad de Informática, Habana, Cuba), Omar Rojas (Universidad Panamericana. Facultad de Ciencias Económicas y Empresariales. Alvaro del Portillo 49, Zapopan, Jalisco, 45010, Mexico), Guillermo Sosa Gómez (Universidad Panamericana. Facultad de Ciencias Económicas y Empresariales. Alvaro del Portillo 49, Zapopan, Jalisco, 45010, Mexico),
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In this work mathematical models of 3D representative volume elements (RVE) with systems of nanoinclusions are developed. Ellipsoidal and conical nanoinclusions of different sizes are considered in a cuboidal matrix of nanocomposites. Optimized packing is used for computational modeling of filling a given marix with ellipsoidal and conical nanoinclusions. The proposed approach permits designing different nanoscale structures with desired properties.
Authors: Tatiana Romanova (Nacional Academy of Sciences, Ukraine), Alexandr Pankratov (IPMach of NASA), Igor Litvinchev (UANL), Elena Strelnіkova (IPMach of NASA),
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The University Educational Institutions are currently perceiving an increase in the demand for their services, which forces them to seek strategies that allow them to have well identified the activities to be carried out at each stage of their processes. This study seeks to identify the strategies, methods, and tools that allow the design of the University Educational Supply Chain, based on a systemic review of the litera-ture. Following as a working method the classification of documents by topic of in-terest, then the characteristics of the university educational supply chain are analyzed, supply chain design tools applied in different environments are analyzed and the most suitable methods are selected based on established criteria. feasible to apply in the university educational environment. It is obtained as a result of this work that the Supply Chain Operations Reference Model, the Value Chain Mapping, and the Simulation, are supply chain design strategies that are adjusted to the university edu-cational environment and that serve as, help to redesign processes, measure the per-formance and effectiveness of the services and products offered to students, the labor market and society in general.
Authors: María del Carmen Toledo Muñoz (Universidad Autónoma de Nuevo León), Rosario Cavazo Salazar (Universidad Autónoma de Nuevo León), José Valadez Cedillo (Universidad Autónoma de Nuevo León),
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Currently, digital tools play an important role in education; these tools are a support to strengthen the knowledge of students while for teachers it can become part of their work material. Using digital didactic tools, the students can understand an algorithm with a certain degree of difficulty and make this degree of difficulty decrease. The digital tool presented in this paper tries to facilitate student learning. Using interactive examples and animations, our didactic tool provides complementary information that help to understand the Transmission Control Protocol (TCP).
Authors: Francisco de Asís López-Fuentes (UNIVERSIDAD AUTONOMA METROPOLITANA-CUAJIMALPA),
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