Examinando por Materia "Cluster analysis"
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Ítem An algorithmic approach for simulating realistic irregular tilings(Universidad EAFIT, 2012) Betancourt Arango, Alejandro; Marín Sánchez, Freddy Hernán; Duque Cardona, Juan CarlosÍtem Dynamics Of The Relation Between Latin America And China: Cluster Analysis, 2005–2018(Universidad EAFIT, 2020-06-19) Wong, Sara A.; Valverde, Ivanna; Silva, Carlos A.; Escuela Superior Politécnica del LitoralLiterature discusses the symbiosis between financing loans granted by China to Latin America and exports from this region to China. This paper contributes to this literature by providing empirical evidence on the relation be- tween Latin American countries and China by creating a typology of countries based on different key aspects such as trade, commodity dependence, debt, environment, and institutionalism in four years over time (2005, 2010, 2015, and 2018). The dependence of countries on financing from China is taken into account, given the limited access to international markets as well as how aspects of government corruption and stability impact such dynamics. The contrast between countries and indicators shows that the relation between China and Latin America involves different aspects beyond bilateral trade.Ítem Efficient software implementation of the nearly optimal sparse fast Fourier Transform for the noisy case(Universidad EAFIT, 2015-08-03) López-Parrado, Alexander; Velasco Medina, Jaime; Universidad del Quindío. Universidad del Valle. Princeton University; Universidad del ValleÍtem Entropy-based graph construction methods for unsupervised data structure detection(Universidad EAFIT, 2021) Ariza Jiménez, Leandro Fabio; Quintero Montoya, Olga Lucía; Pinel Peláez, NicolásÍtem Hacia un perfil docente para el desarrollo del pensamiento computacional basado en educación Stem para la Media Técnica en desarrollo de software(Universidad EAFIT, 2014) Vásquez Giraldo, Alberto León; Zea Restrepo, Claudia MaríaLa educación en Colombia, regida por la Ley 115 de 1994, establece la educación formal desde tres niveles (educación primaria, básica y media) esta última, dio paso a la incorporación de la media técnica, que debía estar en consonancia con las necesidades del sector económico de más alto impacto del país, orientada por medio de ciclos propedéuticos flexibles y a través de la formación por competencias, para que los logros obtenidos por los estudiantes fueran reconocidos en el siguiente nivel de profesionalización; seguida de una articulación con una Institución de Educación Superior o donde los logros obtenidos fueran los adecuados para iniciar su vida laboral -- En Medellín la tendencia laboral, se inclina hacia el área de la prestación de servicios, dirigida hacia el clúster TIC, y a su vez, alineada en la propuesta del gobierno nacional con el propósito de fortalecer la educación técnica y tecnológica, por medio de alianzas estratégicas del sector público, privado y de educación; con el fin de preparar profesionales cualificados, ya que en la actualidad, existe gran demanda de recurso humano que pueda ejecutar esas tareas, y a su vez, crea la necesidad de personal docente que pueda formarlo -- Para superar esta problemática, las alianzas estratégicas han determinado la necesidad de contar con estudios previos de los perfiles necesarios para el clúster TIC y un estado del arte en cuanto a las nuevas tendencias de enseñanza-aprendizaje como el desarrollo del pensamiento computacional, la educación STEM (Science, Technology, Engineering y Mathematics), de los currículos para el adecuado funcionamiento de los programas de formación docente -- Este trabajo de investigación se planteó el objetivo de realizar un estado del arte en cuanto la enseñanza de las nuevas tendencias en pensamientos computacional y educación STEM, que permitiera diseñar un perfil docente idóneo para la educación en media técnica en el área del desarrollo de software -- Estado del arte que inicia con los conceptos básicos que deben estar definidos para el buen desarrollo de esta investigación -- Los conceptos que se determinaron son: formación por competencias, las disciplinas de la informática, la educación STEM y el pensamiento computacional -- A continuación se hace un recorrido bibliográfico alrededor del mundo hasta llegar al nivel nacional y local de lo que se está haciendo en políticas en pro del pensamiento computacional, educación STEM y currículos de las ciencias de la computación, para finalizar con los programas de formación docente -- La revisión de esta información, dio bases para la construcción de dos matrices de los componentes comunes de pensamiento computacional, trabajados entre los países que poseen currículos de las ciencias de la computación y los elementos comunes entre los países que cuentan con programas de formación docente en la misma áreaÍtem International SMEs from emerging markets-Insights from the Colombian textile and apparel industry(Springer New York LLC, 2016-03-01) Gonzalez-Perez, Maria Alejandra; Manotas, E.C.; Ciravegna, L.The internationalization of firms from emerging markets has been studied mainly from the perspective of large firms. Smaller and younger international firms based in emerging markets suffer from underrepresentation in the literature. This study sheds light on the internationalization of emerging market SMEs, focusing on Colombian textile and apparel exporters. Using mixed research methods, it illustrates the role of firm age in influencing internationalization strategy. It examines 1165 export contracts by 50 SMEs, discussing export intensity, speed, and geographic scope using recurrence analysis and cluster analysis. It contributes to international entrepreneurship by exploring new empirical evidence and examining it using a novel methodological approach.Ítem Memberships Networks for High-Dimensional Fuzzy Clustering Visualization(Springer Verlag, 2019-01-01) Ariza-Jiménez L.; Villa L.F.; Quintero O.L.; Universidad EAFIT. Escuela de Ciencias; Modelado MatemáticoVisualizing the cluster structure of high-dimensional data is a non-trivial task that must be able to deal with the large dimensionality of the input data. Unlike hard clustering structures, visualization of fuzzy clusterings is not as straightforward because soft clustering algorithms yield more complex clustering structures. Here is introduced the concept of membership networks, an undirected weighted network constructed based on the fuzzy partition matrix that represents a fuzzy clustering. This simple network-based method allows understanding visually how elements involved in this kind of complex data clustering structures interact with each other, without relying on a visualization of the input data themselves. Experiment results demonstrated the usefulness of the proposed method for the exploration and analysis of clustering structures on the Iris flower data set and two large and unlabeled financial datasets, which describes the financial profile of customers of a local bank. © 2019, Springer Nature Switzerland AG.Ítem Metaheurísticos: una alternativa para la solución de problemas combinatorios en Administración de Operaciones(Revista EIA, 2007-12) Vélez, Mario César; Montoya, José Alejandro; Universidad EAFIT. Departamento de Ingeniería de Producción; marvelez@ eafit.edu.co; jmonto36@eafit.edu.co; Gestión de Producción y LogísticaThe scarce diffusion given to the newest techniques for solving complex operations management problems has as a direct consequence that companies lose opportunities to operate at lower costs and higher efficiency -- The objective of this article is to introduce and explain the fundamental ideas behind metaheuristics, a solution technique for combinatorial problems that has received the most attention from the academiccommunity in the last few years -- In order to illustrate these ideas, an example of a classical combinatorial problem in the sequencing of operations area is presented, and a solution algorithm making use of some of these techniques is proposedÍtem Segmentación de clientes y definición de alertas para la prevención de riesgos de lavado de activos y financiación del terrorismo (SARLAFT): un estudio económico aplicado a entidad financiera colombiana en 2017(Universidad EAFIT, 2017) Amaya Molina, Mateo; Chaparro Cardona, Juan CamiloThe XXI century governments get the challenge to fortress their internal structure and controls against financial crimes of which they can be object -- The money laundering and the terrorism financing are the most frequently committed financial crimes around the world -- This type of activities is threatening the economic equilibrium in silence way turn and it´s representing a risk while talking about international trade relationships too -- The informatics advances in the field of data mining and statistics created a new complete landscape for those governments that try to get preventing controls and to identify that kind of activities -- These controls are required to those type of private organizations operating in the country in depending of the precise risk to each economic sector they belong -- This research develops an innovative method composed by the combination of techniques of data mining applying and the economics sector analysis looking for a possible answer to the financial sector entities controlling designed by SARLAFT in the Colombian governmentÍtem Structure, stability and bonding in the 1Au10 clusters(Elsevier, 2012-04-19) David Caro, Jorge León; Guerra Tamayo, Doris; Restrepo Cossio, Albeiro Alonso; Universidad EAFIT. Departamento de Ciencias Básicas; Jorge León David Caro (jdavidca@eafit.edu.co); Electromagnetismo Aplicado (Gema)A stochastic exploration of the quantum conformational space for the 1Au10 system using a modified Metropolis acceptance test afforded 15 stable configurations in the MP2/SDDALL potential energy surface -- The global minimum is predicted to be a 3D structure with D2d symmetry -- Topological analyses of the electron densities suggest that bonding appears to be of intermediate character, with substantial contributions from both covalent and closed shell interactions and that there is a direct correlation between the topological complexity of the electron density and cluster stability -- Evidence regarding the nature of the interactions is gathered from many sources, including the total number of delocalized electrons (nde), a novel covalency index -- Localization indices and condensed Fukui functions predict higher electron populations on peripheral, lowly coordinated atomsÍtem Variables de la experiencia de usuario (UX) que posibilitan o inhiben el pago por videojuegos en dispositivos móviles(Universidad EAFIT, 2019) Uribe Román, Alejandro; Gentilin, Mariano; Monroy, Juan CarlosThis project presents the investigation on the way in which the user experience (UX) of videogames in mobile devices influences the payment, with the idea of providing tools to the interested parties that allow to improve the conversion, understanding the user as the person who plays video games at least once a week. Topics such as the UX, the user of video games, the user experience focused on the videogame and the CEGE model (Core Elements of Gaming Experience) were addressed, with the latter being the model that will be used. The methodology used was quantitative, through online surveys applied to adults who play on mobile devices at least once a week. For the design of the survey, the Google Forms platform was used and shared through the social networks Facebook and WhatsApp. Statistical analyzes were applied such as logistic regression, to identify and hierarchize the variables of the UX according to the payment, and cluster analysis, to characterize the player who pays. This investigation allowed to identify that the UX influences the payment for the videogame, detecting the variables with higher levels of influence: the enjoyment, the relationship between graphics and sound effects, the control associated with the knowledge of the actions and the clarity in the graphics. The profile of the player who pays and his differences with the player who does not pay was also determined.