bluuebunny/crossref_metadata_2025 huggingface dataset:
Segmentation of Credit Card Customers Based on Their Credit Card Usage Behavior using The K-Means Algorithm
Authors: Karo Karo Ichwanul Muslim
Published: September 2023

The intensity of credit card customers in making transactions has increased in the last 10 years in Indonesia. This is both a challenge and an opportunity for the Bank. Customer segmentation information is beneficial to reduce bad debts or increasing customer credit card limit capacity. This study aims to segment credit card customers based on their usage behavior with a clustering approach using the K-means algorithm. While the process of evaluating segmentation results using the silhouette index. Based on the experimental results, six groups are the best number of clusters. The six groups are shopping hobbies, payment process at maturity, payment by installments, withdrawing cash, buying expensive goods, and types that rarely use credit cards.
TADAKU: Application of Research Questionnaire Collection as an Effort to Increase the Quantity and Quality of Research in Indonesia
Authors: Rahmannisa Fuji , Kurniawan Inggo Iwan , Jabbar Muhammad Fadhli Taqdirul , Syawanodya Indira
Published: September 2023

Data is crucial in today's modern society. One of the most effective ways to obtain data is through online surveys using online questionnaires. However, there is a lack of online questionnaire creation applications that can motivate respondents to participate in surveys. As a result, survey creators often face difficulties in obtaining responses from respondents. The Tadaku application is designed to address this issue by providing a platform for survey creators to create questionnaires and helping them to reach targeted respondents quickly and accurately by implementing a reward system for participants who are willing to complete the questionnaires. Thus, the Tadaku application provides motivation and benefits for respondents. The questionnaire app system is developed using the waterfall method, which consists of four stages: needs analysis, system design, coding, system testing, and maintenance. The features available in the Tadaku questionnaire application include registration, creating new questionnaires, questionnaire completion, and point redemption for cash rewards.
Technology-Based Learning Through Unity Application in Teaching Spatial Volume of Geometric Shapes for 6th Grade Elementary School Students
Authors: Amrinada Alifah , Prayoga Aji Aryo , Ninda Asyifa Dea Ayu , Qurota Ayun Muhammad Rizqi , Abidah Annisa Hasna
Published: September 2023

Technological advancements require educators to be more innovative in the process of teaching mathematics. Therefore, this journal serves as a renewal in utilizing technological advancements, especially in the field of education. The purpose of this research is to create interactive multimedia that utilizes technology to develop a learning application using Augmented Reality (AR). This research utilizes the Multimedia Development Life Cycle (MDLC) method, which consists of concept, design, material, collecting, assembly, testing, and distribution. Based on the research findings, it can be concluded that the learning media in the form of a Unity application for the mathematical concept of spatial volume can be well-designed through its development method, enabling effective learning to achieve learning objectives.
Refuseapp: Waste Transportation Service Application
Authors: Setiawan Jodi
Published: September 2023

Garbage is still a big problem throughout the world, including Indonesia. This waste problem has not yet found the right solution to deal with the increase in waste that continues to grow from year to year. Included in these problems are waste problems, both household waste and industrial or company waste. There are still wastes that cannot be processed and managed properly. The purpose of this study is to find solutions to minimize the accumulation of waste or waste, especially in the sector of an agency. The solution offered in this research is the design of an application called Refuseapp. This application functions as a waste transportation service devoted to the agency sector. This waste transportation service is provided free of charge in the hope of reducing the pile of waste that exists in the agency. The institutions in question are companies and hospitals. The waste to be transported will later be distributed to a waste processing site or waste bank and also to a final disposal site (TPA) in the area. The result of this research is the design of the Refuseapp application in the form of an application mockup.
Analysis of Quality in Project Quality Management Based on PMBOK®
Authors: Pribadi Didik Suwito , Fauzi Cholid , Ekawijana Ardhian
Published: September 2023

Quality is a vital part of a successful organization. Quality is important to a process and result. A good process produces a good product, while a good product is produced through a good process. In project management, quality is used to assess project success. Quality is the degree to which the inherent characteristics meet requirements, while project quality is the process of meeting business objectives according to the project charter. The journal entitled 'Analysis of Quality in PMBOK-Based Project Management', discusses the definition, types, and processes of quality management, intending to explain projects and the process of managing them. The benefit is to explain knowledge about quality and its management. The method used is identification, description of the concept of project quality management, analysis of the management planning process, quality control, and conclusions. This research describes the quality management process, including quality control. The main input utilized in the process including Project Charter, PM Plan, Project Documents, EEF, OPA, Approved CR, Deliverables, and Work Performance Data. The Tools and technic utilized in the process include Expert Judgement, Data Gathering, Data Analysis, Decision Making, Data Representation, Test, and Inspection Planning/ audit, Design For X, Problem Solving Quality Improvement Methods, and Meetings. The results obtained from the above process include the main results consisting of QM Plan, Quality Metrics, Quality Reports, Test Documents, CR, QC Measurements, Verified Deliverables, and Work Performance Information.
A Star (A*) Algorithm Implementation to Measure Shortest Distance from Universitas Negeri Medan to Kualanamu International Airport
Authors: Kiswanto Dedy
Published: September 2023

Searching for the shortest path is a problem that often occurs in everyday life, to determine the best distance some information is needed such as the value / cost between points to be visited. The A* (A Star) algorithm is one of the optimal algorithms in the shortest path search category. This algorithm is very good as a solution to the pathfinding process so that it can save time and money. This research was conducted to determine the shortest distance from Medan State University to Kualanamu International Airport using the A* (A Star) algorithm. The method used in this study is by collecting data using Google Maps, building a graph model as a map representation, calculating the shortest distance and evaluating it. The research results obtained show the accuracy of the A* algorithm in determining the shortest route from Medan State University to Kualanamu Airport where this can save time and money on the way.
Para una caracterización del lenguaje administrativo
Authors: Castellón Alcalá Heraclia
Published: September 2023

RESUMEN

Este trabajo analiza el lenguaje de los textos de la Administración pública, que se puede considerar ocmo uno de los lenguajes para fines específicos. Se trata de describir las notas comunicativas que le dan su propio perfil: emisor, propósito comunicativo, receptor, código y materia. Sin duda, la situación comunicativa en la que se produce es muy importante. Los textos son mensajes que proceden de los poderes públicos, y las formas enunciativas revisten notas peculiares. Los textos se clasifican según su función en la actividad administrativa. Se establecen dos grandes grupos: los textos que contienen carácter normativo, y los que no presentan ese carácter (no normativos). Este trabajo incluye una descripción de las tendencias estructurales de estos textos, que con frecuencia corresponden a determinadas pautas. En los textos normativos hay elementos argumentativos que aportan la justificación para avalar el mensaje.

ABSTRACT

This paper analyzes the language of the public administration texts, which can be considered as one of the languages for specific purposes. We describe much communicative information that gives it its own profile; sender, communicative situation in which a text is produced is very important. Text are messages which come from public authorities and the discourse is particularly constructed. These texts are classified according to their function in the administrative activity. Two great groups of texts are established: those which give some official orders (normative), and those which do not (non normative). This study includes a description of the structural tendencies of these texts. They often correspond to a certain model. In the normative texts there are argumentative devices whose meaning justifies the message.
Localización y funciones gramaticales en wansojot
Authors: Girón Jesús Mario
Published: September 2023

RESUMEN

En este artículo se analizan las marcas de caso en la lengua wansojot (puinave), en tres contextos: la localización de entidades mediante casos espaciles (topológicos), el marcaje de argumentos nucleares del verbo ( relaciones gramaticales) incluida una nominalización de argumento oblicuo, y el uso de una marca en la expresión de relaciones de coordinación interclausal en oraciones complejas. Se discute cómo ciertas formas que tienen como función primaria ser marcas espaciales, son usadas icónicamente para la marcación de funciones gramaticales y relaciones discursivas.

ABSTRACT

In this article, case markers referring to localization in wã´ nsöjöt (puinave) are described and analysed in three contexts: positioning entities (objects) on a background (L), marking core arguments of the verb -including here a nominalization of an oblique argument, and expressing interclausal relationships in complex sentences. The point under discussion is how some forms (case markers) are used iconically in order to express grammatical relations and discoursive constructions besides their meaning as localizers
OTRA AMADA Y OTRO PAISAJE PARA NUESTRO SIGLO XIX. SOLEDAD ACOSTA DE SAMPER Y EUGENIO DÍAZ CASTRO FRENTE A MARÍA
Authors: Alzate Carolina
Published: September 2023

Este artículo presenta un estudio comparativo de tres novelas colombianas: María (1867), la de Jorge Isaacs, una holandesa en américa (1876, 1888), de Soledad Acosta de Samper y Manuela (1858, 1866), de Eugenio Díaz. El estudio comparado muestra elaboraciones alternativas de la figura femenina, de la población y de la geografía. Si en María la protagonista es esencialmente amada, una holandesa propone mujeres no definidas en torno al amor, autónomas y con proyectos de vida propios; Manuela, por su parte, presenta una pareja cuya relación no es el amor entre iguales sino la amistad basada en el conocimiento. El letrado que todo lo sabe y lo comprende en María, queda en estas novelas cuestionado, abriendo espacio así a la voz de otros sujetos marginados del proyecto de fundación nacional, silenciados tradicionalmente por ese letrado.
PROSTITUCIÓN, EL ''OFICIO'' OCULTO DE LA COTIDIANEIDAD EN MANUELA (1858) DE EUGENIO DÍAZ CASTRO
Authors: Sánchez Vargas Andrés Felipe
Published: September 2023

Díaz Castro critica en Manuela la sociedad patriarcal y la doble moralidad masculina con relación a las mujeres. En la Nueva Granada, la prostitución era un problema social, pero a las mujeres no se les ofrecían garantías e igualdades frente a los derechos masculinos. La intolerancia y la discriminación las degradaban y en las regulaciones para controlarlas, se expresaba la doble moral patriarcal y la manipulación legal en que se apoyaba; pero no se ofrecía explicación de las causas que llevaban a las mujeres a esa forma de vida ni las soluciones para esa situación.
OJOS DE LA PALABRA. CONSTRUCCIÓN DEL CONCEPTO DE ECFRASIS, DE LA RETÓRICA ANTIGUA A LA CRÍTICA LITERARIA
Authors: Agudelo Pedro Antonio
Published: September 2023

La palabra ecfrasis ha sido empleada de una manera en la Antigüedad y de otra en la actualidad. El presente estudio centra su interés en ella desde una perspectiva histórica y teórica, mostrando su función en la relación entre imagen y palabra y entre arte y literatura. Se cotejan teorías, investigaciones y aplicaciones importantes, y se presentan algunas conclusiones sobre los problemas de la representación y la relación entre lenguaje verbal y no verbal vigentes en una teoría de la ecfrasis.
La belleza de la dama Erec et Enide de Chrétien de Troyes
Authors: Agudelo Ochoa Ana María
Published: September 2023

RESUMENEn este artículo se analiza la configuración de la belleza de la dama en Erec et Enide de Chretién de Troyes, con el fin de determinar las estrategias descriptivas, las posibles fuentes de las imágenes y los comparantes utilizados. Además, se comprueba la importancia de presentar un equilibrio entre la belleza física y la interior. Todo ello con el fin de construir un modelo de belleza femenina propio de la novela de caballería, donde la dama es una de los elementos que define al caballero errante.ABSTRACT This article deals with the configuration of the beauty of the lady in Erec et Enide by Chrétien de Troyes, with the purpose of determining the descriptive strategies, the possible sources of the images and the parameters to compare these very images used by Chrétien de Troyes. In addition to that, it is confirmed the importance of presenting a balance between the physical and spiritual beuty. All of this to build a model of female bauty portrayed in the Novel of Chilvary, in which the lady is one of the elements that defines the errant knight.
Morgana, díscipula de Merlín
Authors: Lendo Fuentes Rosalba
Published: September 2023

RESUMEN

Este artículo aborda el personaje de Morgana en la tradición de la literatura artúrica, haciendo énfasis en su ambigüedad debida a la evolución del personaje que de una imagen positiva en los primeros textos se convierte poco a poco en esa mujer inquietante y amenazadora propia de la misoginia del medioevo.

ABSTRACT

This article deals with the character of Morgan Le Fay in the tradition of the Arthurian literature, placing special emphasis on her ambiguity due to the evolution of this character, which can be seen in the first texts with a positive image that turns little by little into a disturbing and threatening one, typical attitudes of the medieval misogyny.
REVELACIÓN DE LO ABSURDO EN EL CUENTO “LOS OBEDIENTES” DE CLARICE LISPECTOR
Authors: Velandia Calderón Elsa Liliana
Published: September 2023

Para la escritora Clarice Lispector la náusea es más una afección del alma que entra en crisis por algún elemento que la activa, por un objeto que excita nuevamente la sensación y acción ya reconocida en toda el alma. Por tanto, la experiencia de Lispector resulta más emparentada con lo absurdo. De tal manera que este concepto será revelado en el cuento “Los obedientes”, pues en este existen elementos de lo absurdo que Albert Camus argumenta en el Mito de Sísifo. Y a partir de allí, se observarán algunos cuentos en los que se hacen evidentes rasgos de lo absurdo.
Una parcela de la terminología histórica: el léxico de la botánica, entre la ciencia, la lingüística y la lexicografía
Authors: Vila Rubio María Nieves
Published: September 2023

RESUMENDesde una perspectiva histórica, relativa a nuestro más reciente pasado, este artículo revisa la forma en que fue tratado el léxico de la botánica durante el siglo XX, en el ámbito hispánico, tanto desde presupuestos lingüísticos - como medio para llevar a cabo estudios sobre diversos aspectos de la lengua-, como desde la perspectiva naturalista -en tanto que instrumento imprescindible para el trabajo científico-, poniendo en relieve las coincidencias y divergencias entre ambas posturas. La propuesta final consiste en que para obtener los resultados más idóneos desde ambos lados, el trabajo sobre la terminología botánica debe ser realizado conjuntamente, con el concurso de filólogos y botánicos. Esta aproximación histórica se inserta en la teoría comunicativa de la terminología, mostrando cómo aspectos pragmáticos y sociales tienen una notable incidencia en el quehacer terminológico.ABSTRACTFrom a historical approach, this paper studies the different ways of dealing with the terminology used by botanists, both from linguistic and scientific perspectives. For naturalist, this terminology is one of  their most important work instruments, whereas for language specialists and philologists it is the way to study some aspects of language. A study that combines both perspectives would be the best method in order to obtain better results than those which have been obtained during the last century. Also, this approach proves that pragmatics and sociolinguistics have an important role on terminology works.
Panorama de la historiografía literaria en torno a la región: historias, política, propuestas
Authors: Higuera Gómez Ángela María , Garzón Agudelo Diego Leandro , Largo Gaviria Víctor Santiago
Published: September 2023

RESUMENLa construcción de la nación en Colombia ha sido un problema debido en parte a su heterogeneidad territorial ya que la fragmentación regional y la imposición de un centro administrativo, precedieron a la nación como comunidad de identidades. Ello ha repercutido en la historia de la literatura colombiana, puesto que paralelamente se ha escrito durante más de cien años la historia de la literatura de las regiones. De esta manera, los trabajos que han difundido autores y obras de cada localidad se constituyen en verdaderos espacios discursivos críticos del canon y la idea de nación, dado que parten de un principio hasta ahora ignorado: nuestra diversidad.ABSTRACTThe construction of the nation in Colombia has been a problema due partially to its territorial heterogeneity since the regional fragmentation and the imposition of an administrative center preceded the nation as a community of identities. This situation has have repercussions on the Colombian literature, seeing that the history of the literature of the regions has been parallel written during more than one hundred years. This way, the studies disseminated by authors of this region represent actual discursive opportunities to criticize the canon and the idea of nation, in view of the fact  that they begin from a point so far ignored: our diversity.
Editorial
Authors: Botero García Mario
Published: September 2023

Llegar al número 50 es un momento importante para cualquier publicación académica, y más aún cuando las temáticas tratadas tienen que ver con la literatura y la lingüística. Es por esta razón que el presente número de nuestra revista se constituye en una celebración al llegar a una cifra simbólica como lo es el númeo 50; pero ante todo este número se convierte en un homenaje a la perseverancia de los fundadores de la revista y de los diferentes profesores que, desde 1979, han luchado para que cada semestre Lingüística y Literatura siga apareciendo. En efecto, sin la constancia de sus diferentes directores, de los diferentes miembros de los comités (Editorial y de Consultores), sin el apoyo de autores, lectores y estudiantes, nuestra revista no hubiera logrado estos 28 años de publicación ininterrumpida. Nuestros agradecimientos y felicitaciones van para todos ellos.Gracias a este esfuerzo común, Lingüística y Literatura se ha consolidado a través de todos estos años como un vehículo propicio para ese diálogo fundamental entre los miembros de la comunidad académica. El presente número monográfico lo confirma una vez más: el grupo de investigación Grupos de Estudios Lingüísticos Regionales de la Universidad de Antioquia ha reunido una serie de artículos, productos casi todos de proyectos de investigación, alrededor de la lexicografía, rama de la lingüística que adquiere cada vez más importancia en el campo de la investigación universitaria a nivel mundial, como lo demuetra el profesor Francisco Zuluaga en la presentación de este número. Agradecemos particularmente al Grupo de Estudios Lingüísticos Regionales su valioso aporte al desarrollo de la revista a través de las propuestas que se reúnen en este número monográfico.Esperamos que a partir de esta nueva etapa que comienza, la revista Lingüística y Literatura continuará jugando un papel cada vez más importante en el contexto académico no solamente nacional sino también internacional.Debemos terminar señalando el fallecimiento del profesor Álvaro Félix Bolaños (University of Florida) quien, en su calidad de miembro del Comité de Consultores, apoyó constantemente las actividades de la revista. El equipo editorial de Lingüística y Literatura lamenta profundamente la desaparición del profesor Bolaños, le rinde un homenaje póstumo y hace llegar sus condolencias a familiares y amigos.Mario Botero GarcíaDirector, Lingüística y Literatura
La influencia de Visión deleytable de las ciencias de Alfonso de la Tore en Celestina de Fernando de Rojas: algunas reflexiones filosófico-religiosas.
Authors: Montero Ana M.
Published: September 2023

Resumen: En este ensayo se analiza la influencia del tratado filosófico Visión deleytable de las ciencias (c. 1450) de Alfonso de la Torre en la Tragicomedia de Calisto y Melibea, ideología, se observa cómo ambos autores manifiestan preocupaciones similares de fondo ontológico en lo que concierne la providencia, el origen del mal y, en definitiva, el estar del ser humano en el mundo.Philosophical and Religious Reflections on the Influence of Alfonso de la Tore’s Visión deleytable de las Ciencias on Fernando de Rojas’ CelestinaAbstract: This paper analyzes the influence of Alfonso de la Torre’s philosophical primer Visión deleytable de las ciencias (c. 1450) on the Tragicomedia de Calisto y Melibea or Celestina (1499) by Fernando de Rojas. In spite of obvious differences related to genre and ideology, both authors share a similar concern with ontological issues such as providence, the origin of evil, and the nature of human existence.L’influence de Visión Deleytable de las Ciencias D’Alfonso de la Tore dans la Calestina de Fernando de Rojas: quelques réflexions philosophico-religieusesRésumé: dans cet article nous analysons l’influence du traité philosophique Visión deleytable de las ciencias (c.1450) d’Alfonso de la Torre dans la Tragicomedia de Calisto y Melibea ou Celestina (1499), de Fernando de Rojas. En se basant sur d’évidentes différences pour ce qui est du genre et de l’idéologie, nous observons de quelle manière les deux auteurs manifestent des préoccupations similaires de fond ontologique en ce qui concerne la providence, l’origine du mal et, en définitive, l’être de l’être humain dans le monde.
Gutiérrez Girardot, Rama y Bourdieu: aportes teóricos y metodológicos para la construcción de las historias literarias regionales y nacionales. El caso del subcampo antioqueño.
Authors: Marín Colorado Paula Andrea
Published: September 2023

Las propuestas de Rafael Gutiérrez Girardot, Ángel Rama y Pierre Bourdieu permiten reconocer la pertinencia de construir una historia literaria de acuerdo con la noción de “campo”, planteada por Bourdieu, y de “vida literaria” e “historia social de la literatura”, propuesta por Gutiérrez Girardot, así como de los procesos de “transculturación” y “aculturación”, expuestos por Rama. De esta manera, se abre un espacio de reflexión para entender las literaturas regionales –en este caso, de Antioquia– más allá de una categoría apriorística o folclorista.
Pertinencia de la historia conceptual para el estudio de fenómenos literarios específicos: Una aproximación desde el costumbrismo.
Authors: David Bravo Alba Inés
Published: September 2023

Este artículo se propone examinar la pertinencia de los presupuestos teóricometodológicos de la historia conceptual para investigaciones históricas o historiográficas en el campo de la literatura. La historia conceptual se proyecta más allá de los significados de las palabras o sus cambios para contrastar sus hallazgos en la historia de los hechos. Se concibe el Costumbrismo en el marco de una relación entre la historia conceptual, cuya capacidad semántica permite percibir en el lenguaje señales de cambios sociopolíticos o de conflictos y la historia social, abocada a comprender y a explicar las formaciones sociales.
novela urbana en Colombia: Reflexiones alrededor de su denominación.
Authors: Mejia Correa Clara Victoria
Published: September 2023

Este artículo plantea una reflexión sobre la definición de la novela urbana para incluirla como un capítulo importante en la historia de la literatura colombiana. Propone que esta posibilidad narrativa se consolida en Colombia durante la década del setenta y que su delimitación puede hacerse comparándola con su predecesora la novela de ciudad: en la novela de ciudad ésta aparece como escenario mientras que en la novela urbana la ciudad es el foco desde el cual se configura la narración.
capítulo del ensayo del siglo XX en Colombia: Baldomero Sanín Cano.
Authors: Benítez Hernando Urriago
Published: September 2023

Este artículo proyecta la recepción crítica sobre Baldomero Sanín Cano luego de su muerte. Se detiene en el caso particular de su obra ensayística, como género literario que le permitió problematizar la cultura hispanoamericana del modernismo, lo que lo convierte en un hito clave de la historiografía literaria.
ESPACIOS, DESPLAZAMIENTOS Y PÉRDIDAS EN RAYUELA
Authors: Werder Sophie von
Published: September 2023

Las diferentes maneras de leer Rayuela se basan en la constelación de las tres partes"del lado de acá", "del lado de allá" y "de otros lados", e implican diferentes visiones delexilio. La lectura lineal de las primeras dos partes, ofrece una visión bipolar de dos lugares quese distinguen y se oponen. El segundo modo de lectura rompe con la bipolaridad y comienzaa invertir la cronología y la unidad espacial. Los lugares se fusionan, las nociones del "acá"y "allá", en algún momento pierden vigencia y sentido. En Rayuela, el desplazamiento enel espacio llega a ser una metáfora de la toma de distancia y la imposibilidad de volver orecuperar lo perdido.
El uso de metáforas en tres artículos académicos de educación virtual
Authors: Sánchez Upegui Alexánder Arbey
Published: September 2023

RESUMEN

Las metáforas en artículos acádemicos electrónicos es una perspectiva de estudio del discurso especializado, en el marco de la retórica de la ciencia. Tema importante en la configuración de un manual de redacción y en la formación de editores e investigadores que deben escribir para publicar en entornos virtuales.Para la investigación se eligió una muestra intencional de tres artículos artículos académicos. Se aplicó  como marco de indagación la clasificación de las metáforas de Lakoff y Johnson: estructurales, orientacionales y ontológicas.

ABSTRACT

This article is a progress report on a research project entitled A Writing and Editing Handbook for Digital Environments. This project is carried out by the Social Communication Program, at the Fundación Universitaria Católica del Norte. The use of metaphors in online academic articles is an approach to analyze the specialized discource, as part of the rhetoric of Science. It is a relevant issue both in the design of a writing handbook and in the training of editors and researches who have to write for publications on virtual environments. To do this research, an intentional sample selected from three academic articles was taken. It was also implemented, as part of the investigation, the classification of metaphors of Lakoff & Johnson: structural, ontological and orientational.
Transition from a predictive multiple linear regression model to an explanatory simple nonlinear regression model with higher level of prediction: A systems dynamics approach
Authors: Baeza-Serrato Roberto , Vázquez-López José Antonio
Published: September 2023

One of the main assumptions of the linear regression analysis is the existence of a causal relationship between the variables analyzed, which the regression analysis does not demonstrate. This paper demonstrates the causality between the variables analyzed through the construction and analysis of the feedback from the variables under study, expressed in a causal diagram and validated through  dynamic  simulation.  The  major  contribution  of  this  research  is  the  proposal of the use of the system dynamics approach to develop a method of transition from a multiple regression predictive model to a simpler nonlinear regression explanatory model, which increases the level of prediction of the model. The mean square error (MSE) is taken as a criterion for prediction. The validation in the transition model was performed with three linear regression models obtained experimentally in a textile company, showing a method for increasing the reliability of prediction models.
Steam oxidation at 700 ºC and 750 ºC of the stainless steel AISI 317 aluminum coated by CVD-FBR
Authors: Marulanda José L. , Castañeda Saul I. , Remolina Aduljay
Published: September 2023

Oxidation was made of austenitic stainless steel AISI 317 aluminum coated by chemical vapor deposition in a fluidized bed at temperatures of 700 °C and 750 °C, in an environment with 100% steam, to evaluate their corrosion performance. Gain mass curves were ground and oxide films were analyzed by SEM and X-ray diffraction to observe the morphology of the oxides. Thermodynamic simulation was carried out during steam oxidation of the substrates  for  possible  solid  and  gaseous  phases  which  could  be  formed  in  the presence of an environment with 100% water vapor and atmosphere pressure. The form of attack at 750 °C is similar to 700 °C, although the rate of oxidation is increased, because the diffusion of the alloying elements and the  oxidation  reactions  are  faster.  Aluminum  coatings  have  good  resistance  to steam oxidation and forming a surface layer of Al2O3,  that  is  dense  and  adherent, which protects the substrate from corrosion attack.
Analysis and design of control systems to application in portable dry block
Authors: Hernández Gonzalez Leobardo , Medrano Hernández Juan , Bermúdez González Issac , Santillán Jiménez Ariadna
Published: September 2023

Currently the industry works with rigorous quality standards in their production processes, forcing instruments have most accurate measurement possible, to achieve this certification must send to calibrate their instruments outside facilities, but these is difficult due to the operation periodical or are in a process of production, as solution they have contracted specialist companies for the calibration process within the plant, being an expensive solution. As a practical solution we present the design of a portable dry block bath based on Peltier Cells for the calibration of temperature sensors, which complies with the characteristics of being an instrument of easy transport and handling for sensor calibration within the plant. The experimental prototype dry block bath achieves a temperature range from 0°C to 150°C (273,2°k to 423,2°k) typical industrial processes. To ensure correct temperature control is designed a digital PID control algorithm, which was implanted in a PiC. The temperature control system was validated with experimental simulations and tests the whole system operation, quite satisfactory results were obtained.
Tools for the selection of the transmission probability in the cluster formation phase for Event-Driven Wireless Sensor Networks
Authors: Rivero-Angeles Mario Eduardo , Orea-Flores Izlian Yolanda
Published: September 2023

In the literature, it is common to find studies on Wireless Sensor Networks (WSNs) that consider the Carrier Sense Multiple Access (CSMA) protocol with a fixed transmission probability for means of the random access strategy. This is especially true for event-driven applications for clusteredbased architectures. However, due to the highly variable environment in these networks in terms of the number of nodes attempting a transmission (at the beginning of the cluster formation all nodes in the network contend for the channel, while at the end only a few nodes attempt a transmission), a fixed transmission probability may not entail an adequate performance. Specifically, the energy consumption may be too high by considering a fixed transmission strategy, because the use of a low transmission probability at the beginning of the cluster formation reduces the collision probability, but at the end entails long idle periods. In view of this, the effects of three different transmission probability strategies for event-driven WSNs are studied. Based on the obtained results, it is shown that a careful selection of the transmission probability is required in order to prolong the network lifetime.
system approach to analyze the productivity of a Colombian gold mining process
Authors: Delgado Álvarez Carlos Arturo , Arango Aramburo Santiago , Romero Hernández Antonio
Published: September 2023

Colombian  gold  mining  is  a  complex  system  characterized  by  interactions  between  individuals,  organizations  and  other  variables,  which  are  involved  in  the  system  behavior.  The  gold  mining  system  integrates  the  exploration,  extraction, dressing and commercialization processes. There are exogenous issues that affect the system performance and its productivity, and increase the complexity. These issues are of social, environmental, political, economical, technological and organizational types. In order to analyze this complexity, we develop a system dynamics model that allows characterizing the system and evaluating policies to improve productivity of a Colombian gold mining process. We simulate different scenarios of the model in which we can observe that  sustainable  investment  policies  increase  the  productivity  of  the  gold  mining system in Colombia. Increases of social capital promotion activities and physical infrastructure in the region of influence affect positively the multifactorial productivity of the Colombian gold mining process.
simplification to the fast FIR-FFT filtering technique in the DSP interpolation process for band-limited signals
Authors: Castillo Soria Francisco Rubén , Badillo Ignacio Algredo , Fernández Torres Gustavo , Sánchez García Jaime
Published: September 2023

Frequently, when great amounts of sampled data are manipulated, it is necessary to reduce them to a fraction that truly represents the data. Here two elements are important; neither is it desirable for the amount of data to be too extensive; nor is it desirable to lose key information. For the data reconstruction,it is often required a interpolation technique. This work proposes an optimization of the fast FIR filtering-based DSP interpolation technique. The resulting interpolator is a feasible, simplified version of hardware implementations, which is ideal for the reconstruction of band-limited signals with adequate sampling. In case studies included in this work, wind and temperature signals are used. The temperature signal has a suitable sampling rate and with the use of the interpolator it presents an error of 3.95% for a reduction of 99.61% of the data. The wind signal is very unpredictable and it does not have a suitable sampling rate. Hence, the interpolator does not improve the reconstruction of the signal in comparison to the averages. Typically, an average signal value is recorded for each 10 minute period, in which, the wind signal presents an error 8.6 times greater than the temperature signal. In order to reduce this error in the wind signal, it is recommended to increase the sampling rate and the quantization levels in measurement equipment.
Non-linear joint transform correlator for micro-displacement measurement using speckle patterns
Authors: Guerrero Bermúdez Jáder E. , Valdivieso González Luis G. , Tepichín Rodríguez Eduardo
Published: September 2023

This work presents a procedure for measuring displacements of tens micrometer, in one and two dimensions, based on the correlation between two speckle patterns. For this purpose, two objective speckle patterns arerecorded by a digital camera -one before and one after the object has been moved- and placed in the input plane of nonlinear joint transform correlator.
Nonlinear transformation of the joint power spectrum allows a sharper correlation peak and a high signal to noise ratio. The autocorrelation peak coordinates of the first pattern are set as a reference for measuring shifts of the successive cross-correlation peak. One criterion for reliable measure is proposed. Results related with different distances sample-sensor and illuminating wavelengths at 632.8 nm and 543.5 nm are presented.
Component-Based Java Legacy Code Refactoring
Authors: Arboleda Hugo , Paz Andrés , Royer Jean-Claude
Published: September 2023

Component-Based Software Engineering (CBSE) claims to improve software modularisation and to embed architectural concerns. Refactoring Java legacy code with CBSE in mind requires first assessing the compliance of legacy code with component programming principles. This paper presents a portfolio of rules to assess the compliance of Java legacy code with the Communication Integrity (CI) property, which is one of the major strengths of the CBSE approach. These rules are proposed with the objective of identifying implicit component types and thus provide a measure of the componentisation of an application. In order to help developers and legacy code maintainers when refactoring their applications, along with the rules, this work leads to define a set of refactoring actions. Additionally, the results of testing, comparing and analysing the outputs of refactoring several Java applications are also presented.
Electrokinetic remediation of mercurycontaminated soil, from the mine El Alacran-San Jorge river basin, Cordoba- Colombia
Authors: López Barboza Erick , Marrugo Negrete José Luis
Published: September 2023

The aim of this work was to evaluate the electrokinetic technique for remediation of mercury contaminated soils from the mine El Alacrán, located in the San Jorge river basin from Colombian's Córdoba department. KI andNaCl solutions were used as complexing agents for removing mercury at two concentrations 0.01 M and 0.05 M, by applying voltages of 30 and 40 V respectively. The best results were obtained when KI was used as complexing agent, reaching percentages of recovery up to 98.7%. The treatments where NaCl was used as complexing agent not achieved significant recoveries (< 1%), except when was used a concentration of 0.05 M NaCl with an applied voltage of 40 V reaching a recovery of 38%. In all experiments, the mercury moved towards the anode due to complexation of anionic nature complex and was observed that increasing concentrations and voltages a more efficient and speedy removal of mercury in the soil was achieved. The results showed that the iodide has properties that make it a promising electrolyte solution for theremoval of mercury in the soil.
Passive sampling in the study of dynamic and environmental impact of pesticides in water
Authors: Narvaez V. Jhon F. , Lopez Carlos A. , Molina P. Francisco J.
Published: September 2023

Pesticides are the most applied substances in agricultural activities which can contaminate water bodies by direct or indirect discharge, but large volumes and natural transformation processes can decrease the concentration of these substances and their degradates in watershed. Currently, conventional extraction methods such as: solid phase extraction (SPE) and solid phase micro extraction (SPME) among others do not permit low detection limits. However low levels of pesticides and degradates could produce chronic toxicity in different species. Nowadays, passive sampling is widespread used for monitoring pesticides and for ensuring the water quality and bioaccumulation studies due to this methodology allows the detection of pollutant from parts per quadrillion (ppq). The most popular membranes used in passive sampling are the semipermeable membrane devices (SPMD), which permit the concentration of lipophilic substances and the polar organic chemical integrative sampler (POCIS), which permits concentration of the hydrophilic ones. This review is about the application of passive samplers in pesticides analysis, the importance of these devices in the bioaccumulation studies and the evaluation of the ecotoxicological risks. Finally, passive sampling allows reducing costs, time and the amount of organic solvent used which classifies it within the environmental trends of “green analytical chemistry”.
Lipid Vesicle Detection using ISFET devices
Authors: Briceño Juan Carlos , Ortiz Pereira Juan Carlos , Graciela Ávila Alba , Rey Ivan Adolfo , Leidy Chad
Published: September 2023

The Ion Sensitive Field Effect (ISFET) Transistors are electronic devices widely used for detecting, ion concentrations, trapped charge or charge decay processes. This article reports on the electrical characterization of ISFETs exposed to buffer solutions sets at pH 4, 5, 7, and 10. When operated in their saturation regime ISFETs act as local charge detectors. This capability is applied to detect lipid vesicles. Lipid vesicles have promising applications in drug delivery, and their accurate detection can be important in understanding their interaction with living systems.
Recent advances in navigation of underwater remotely operated vehicles
Authors: Sierra Bueno Daniel Alfonso , Martínez Carvajal Blanca Viviana , Villamizar Mejía Rodolfo
Published: September 2023

A review of the most significant technical papers related to the navigation of underwater remotely operated vehicles is presented, with special interest in aided inertial navigation. Sensors used for implementation, fusion algorithms and models that describe the navigation systems are presented. From this review, it was concluded that the implementation of an estimator, based on the vehicle kinematic and dynamic models, limits the growth of the estimated error, even in case that the only available information is that provided by an inertial measurement unit.
Variations of seasonal and spatial Hg, Pb, Cr and organic matter contents in Ayapel Flood Plain Lake sediments, Córdoba, northwest Colombia
Authors: Rúa Cardona Alex Fernando , Flórez Molina María Teresa , Palacio Baena Jaime
Published: September 2023

The Flood Plain Lakes of the Atlantic Colombian have been impacted by artisanal gold mining during last decades. However, the obtained results have been compared to action levels relevant to other latitudes and the investigations have not included other trace metals of sanitary interest. The present study contributed to understanding the spatial geochemical response controlled by hydrological pulse and organic matter (OM) composition within the Ayapel Flood Plain Lake influence area. We assessed the seasonal and spatial variations of mercury (Hg), lead (Pb), and chromium (Cr) content in recent Ayapel Flood Plain Lake sediments and then compared them with the determined local pollution level of Hg (0.032 μg g-1), Pb (2.39 μg g-1) and Cr (89.58 μg g-1) found in Betulia Formation. The ranges of metal content were 0.008-0.117 μg Hg g-1, 1.090-11.870 μg Pb g-1, and 5.350-93.430 μg Cr g-1. Hg showed the largest spatial variation (0.083 ± 0.064 μg g-1) and the highest values at the distributaries of the former gold mining fronts. About 91 % of samples displayed Pb enrichment (6.376 ± 4.048 μg g-1) and 66.6 % Hg enrichment when compared with the reference levels. In contrast, Cr content was relatively low (96.325 ± 29.868 μg g-1) and showed a decreasing trend from East towards West. The sediment was mainly inorganic (88.154 ± 3.822 %) with depleted OM levels (11.846 ± 3.822 %). The results suggested enhanced Hg motility owing to a high respiration rate of OM about the centre of the main water table. The sediment resuspension and migration was facilitated by thermal instability of the water column influenced by wind action.
Evaluation of mature landfill leachates Treatment systems: the case of the landfill Curva de Rodas (Medellín-Colombia)
Authors: Canizales Sebastian , Molina Francisco , Castro Camilo , Saldarriaga Julio
Published: September 2023

Leachates produced in the closed landfill Curva de Rodas in Medellin, Colombia are catalogued as mature leachates. These are characterized as poorly biodegradable waste containing organic compounds such as fulvic and humic acids, heavy metals, ammonia, nitrogen, and salts. In this paper five possible physicochemical leachate treatments are evaluated: adsorption with five types of granular activated carbon (GAC), adsorption with zeolite type A, Fenton oxidation, chemical precipitation by Ca(OH)2, and coagulationflocculation with aluminum sulfide type A. The treatments are compared in terms of their capacity to remove Chemical Oxygen Demand (COD) and color. GAC adsorption removals of up to 39% for COD and 50% for color were achieved. In the case of the adsorption with zeolite type A, negligible removals of COD and color were achieved (3% and 7% respectively). Removals using the Fenton oxidation and neutralization with NaOH reached up to 95% for COD and 97% for color. When additionally neutralized with raw leachate the removals were up to 79% for COD and 87% for color. Finally in the chemical precipitation tests, removals of 27% for COD and 63% for color were achieved. Clearly, Fenton oxidation was identified as the most appropriate treatment process.
Experimental Validation of Motor Current Signature Analysis for a 2HP Induction Motor
Authors: Quiroga Jabid E. , Oviedo Silvia J. , Ordóñez Plata Gabriel
Published: September 2023

The  use  of  stator  currents  signal  analysis  for  rotating  electrical  machines  monitoring, particularly induction motors, has developed a growing interest, as the information contained in the spectrum of the current signal can indicate the  presence  of  various  types  of  both  electrical  and  mechanical  failures.  In this  work  a  test  bed  for  induction  motors  2  HP  was  implemented  in  order  to validate the MCSA (Motor Current Signature Analysis) methodology, for the  detection  of:  short  circuit  in  the  stator  winding,  broken  rotor  bars  and  eccentricity gap under different load conditions. Results show the dependency between the load level on the motor and the possibility to detect faults, and make possible to assess the feasibility of implementing MCSA methodology in of condition-based maintenance (CBM) schemes.
Transforming natural language into controlled language in requirements elicitation: a pre-conceptual-schema-based conceptual synthesis
Authors: Manrique Losada Bell , Zapata Jaramillo Carlos Mario
Published: September 2023

During  the  requirements  elicitation  process,  a  group  of  analysts  and stakeholders  identify,  capture,  and  integrate  requirements.  Textual  or graphic   descriptions   capturing   the   most   relevant   concepts   from   the   domain of a software application development are generated. Commonly, the  initial  phases—identifying  and  capturing  requirements  expressed  in natural language—are executed by using techniques in which high analyst intervention and comprehensive knowledge of the context and the problem domain are required. Thus, a subjective, ambiguous, and error-prone process is  implied,  causing  losses  in  the  generation  of  the  initial  domain  models  (specified in a controlled language). In this paper we provide a synthesis of trends  and  conceptual  approaches  found  in  the  state  of  the  art  concerning  the  natural  language  transformation  into  controlled  language  during  the  requirements elicitation process. Finally, we propose a pre-conceptual schema for representing the conceptual framework of the transformation process.