bluuebunny/crossref_metadata_2025 huggingface dataset:
Don Quijote de la Mancha, caballero andante: el acto de investidura a partir de imágenes
Authors: Lucía Megías José Manuel
Published: September 2023

RESUMEN

En este artículo se presenta un momento esencial en la vida de Don Quijote como caballero andandte: el acto de envestidura. Se comienza con un recorrido por los referentes literarios y caballerescos que permitan comprender este acto en su contexto, del cual se seleccionan dos momentos esenciales: la pescozada y el beso del oficiante, momentos que Cervantes reescribe en tono humorístico pero teniendo siempre en perspectiva el hipotexto caballeresco. Luego, a partir de algunas ilustraciones pertenecientes a diferentes ediciones del Quiijote (del siglo XVII al XIX) que abordan este momento clave, se pretende establecer las líneas maestras de los cambios de lectura del Quijote  en sus tres primeros siglos de éxito y difusión.

ABSTRACT

This article presents a crucial moment in the life of Don Quixote as a knight errant: the act of investiture. It begins with a tour of the literary references of chivalry that allow to understand this act in context, from wich it is selected two key moments: the slap on the neck and the kiss of the officiant, moments that are rewritten in a humorous tone by Cervantes, always taking into perspective the chivalry hypotext. Then, after some illustrations from various editions of Don Quixote (from the XVII century to the XIX century), which address this significant moment, it is intended to establish guidelines of the reading changes of Don Quixote in its first three centuries of success and difussion.
Ideal und Wirklichkeit cincuenta años después. El estudio de Erich Kóhler y la crítica literaria hacia el año 2000
Authors: Trachsler Richard
Published: September 2023

RESUMEN

Se muestra en este artículo la importancia que tuvo para el desarrollo de los estudios en medevística el aporte de Erich K´hler con su libro Ideal und Wirklichkeit in der höfischen Epik. Studien zur Form der frühen Artus - und Gralsdichtung, publicado en 1956. Con este libro se presentaba la primera tentativa moderna para explicar la obra de un autor medieval a partir de una clave socio-histórica. En su momento el texto de Kólher fue una novedad absoluta en el pequeño mundo de los medievalistas de entonces y una rareza igualmente en el campo de los modernistas, ya que los estudios literarios en los años cincuenta, se habían autolimitado a acercamientos de tipo "inmanentista" o a la investigación "positivista", privilegiando la simple descripción de hechos.

ABSTRACT

This article deals with the importance that has had the contribution of Erich Kóhler in the development of the Medieval Studies through his book Ideal und Wirklichkeit in der höfischen Epik. Studien zur Form der frühen Artus-und Gralsdichtung, published in 1956. With this book, Kóhler presented the first modern attempt to explain the work of a medieval author from a socio-historical point of view. By Kóhler's time this text was an absolute novelty in the small world of medievalists and a rarity in the field of the modernists since the literary studies in the 1950s had limited themselves to an "inmanentist-like" approach or to the "positive" research, giving preference to the simple description of facts
GANADEROS, DOMADORES, COPLEROS Y CONUQUEROS: LA FRONTERA LLANERA EN LA VORÁGINE DE JOSÉ EUSTASIO RIVERA
Authors: Ortiz Rodríguez María de las Mercedes
Published: September 2023

En la primera parte de La vorágine, el protagonista, Arturo Cova, introduce al lector al paisaje y la cultura de los llanos de Casanare, una región considerada como bárbara y al margen de la nación. El poeta valora positivamente elementos de la cultura llanera de origen hispánico, tales como el español regional, la música, las labores de ganadería y la doma, e incorpora así los Llanos a la nación como comunidad imaginada. Por el contrario, subestima importantes legados indígenas como la agricultura de conuco y el chamanismo. Los grupos amerindios vivientes, presentados como salvajes en la obra, permanecen excluidos

de la nación.
Diccionario del Español Usual en México, dirigido por Luis Fernando Lara, México: El Colegio de México, 1996.
Authors: Velásquez Upegui Eva Patricia
Published: September 2023

Estimar críticamente una obra terminada resulta una tarea sencilla, lo realmente complicado es elaborarla, por tanto el interés es este escrito es reconocer, con base en los fundamentos teóricos de la lexicografía, la superestructura, la macroestructura y la microestructura que subyace en el Diccionario del español Usual en México, con el objetivo de realizar una aproximación teórica y valorativa a la obra lexicográfica desde las diferentes estructuras que componen el diccionario.
Castañeda Naranjo, Luz Stella y José Ignacio Henao Salazar. Diccionario de parlache, Medellín: La Carreta Editores, 2006, 233 p.
Authors: García Zapata Carlos
Published: September 2023

El Diccionario de Parlache (de aquí en adelante DIPARLA), publicado recientemente por La Carreta Editores, es una significativa obra de lexicografía regional antioqueña. Elaborado por los profesores - investigadores Luz Stella Castañeda Naranjo e Ignacio Henao Salazar, era esperado en el ámbito académico y cultural, luego de la aparición de El Parlache (2002), estudio sociolingüístico del dialecto proveniente de los sectores populares y marginales de la ciudad de Medellín y de su área metropolitana.
Lucien Renchon, detective y criminal: La doble perspectiva en Cinco tardes con Simenon
Authors: Rodríguez Peña Adriana del Pilar
Published: September 2023

RESUMEN En este texto se hace un análisis de la novela Cinco tardes con Simenon desde la perspectiva de la novela negra. La hipótesis central explora las coincidencias, las divergencias y la actualización de esta novela en la narrativa negra en Colombia, como una posible tendencia en el campo de la narrativa colombiana entre 1990-2005.ABSTRACT This paper proposes the analysis of the novel Cinco tardes con Simenon from the perspective of the black novel. The central hypothesis explores coincidences, but, more than that, the differences between this novel and the black genre as a possible tendency in Colombian narrative between 1990 and 2005.
JOSÉ DONOSO, CONTANDO LA HISTORIA Y RECLAMANDO LA RESPONSABILIDAD SOCIAL DEL ARTISTA
Authors: Gómez Juan David
Published: September 2023

La Revolución Cubana y los golpes de estado en Latinoamérica, entre otras cosas, obligaron a artistas latinoamericanos comprometidos con el mejoramiento de sus respectivas sociedades, a meditar sobre la posibilidad de transformar su compromiso social en un compromiso socialista. Este ensayo demuestra como La desesperanza de José Donoso rechaza este llamado y marca una nueva etapa en las relaciones entre el socialismo y la literatura americana al ser una novela comprometida con la actualidad política chilena sin convertirse en un texto socialista.
Los morfemas de caso de lengua Wounan
Authors: Arboleda Adriana
Published: September 2023

RESUMEN

Este artículo muestra la interdependencia del verbo y los participantes. Se ilustra la relación sistemática que existe entre la morfología propia del nombre y su capacidad de incorporación de personas en el verbo. La investigación fue realizada desde la etnociencia y la lingüística descriptiva, lo que permite hacer una valoración gramatical de la lengua, pero, desde la apropiación que los hablantes tienen de ella en la actualidad, por tal razón hablamos de un estudio sincrónico. El conocimiento de este campo desde la perspectiva etnocientífica aporta elementos de juicio para la apertura, discusión y construcción de currículos y propuestas pedagógicas cuyos contenidos temáticos incorporen la manera "propia" de ver e identificar el mundo.

ABSTRACT

Case Morphemes in Wounan Language: This article presents the existing interdependence between verbs and participants. It also illustrates the systematic relation ship between the typical morphology of the name and its capability of include the person in verbs. The research has been conducted from the ethnoscience and descriptive linguistics perspectives. It allows an assessment of the grammar of the Wounan language through the speakers’ usage, as well. For that reason, this study deals with a synchronic study. The knowledge of this field, from the ethnoscientific approach, provides elements of judgment for opening, discussing and building new curricula and teaching-proposals whose thematic contents incorporate the Wounan community’s ”unique” way of perceiving and identifying reality
What can’t be ignored in service quality evaluation: Application contexts, tools and factors
Authors: Pérez Jorge Iván , Muñoz Giraldo Leandro
Published: September 2023

This  paper  locates  a  Relevant  Literary  Space  (RLS)  about  service  quality  evaluation,  between  2006  and  2011,  in  order  to  characterise  the  following:  service  typologies,  evaluation  approaches,  measurement  models,  reliability  indexes, scales, quantitative techniques, factors (or quality dimensions) and likely variables affected by them. For this we use a systematic literature review methodology, taking the Scopus database to browse the research papers. The procedure was carried out through the plan-do-check-act cycle. The findings show that the e-service is the most studied typology; the hybrid models are the most used as well as the 7-point Likert scale and Cronbach’s Coefficient Alpha (average value of 0.87). Also, the findings show that the majority of  the  research  community  applies  Structural  Equation  Modeling.  From  a  holistic interpretation, a general structure of service quality is proposed. This article offers findings about the application of reproducible methods, open-to-scrutiny, and free of inclusion/exclusion biases of studies.
Implications of heterogeneity on transport simulations at large scale: the Morroa aquifer case
Authors: Pérez-García Anibal Jose , García-Cabrejo Oscar , Obregón-Neira Nelson
Published: September 2023

The Morroa aquifer located in Sucre state (northern Colombia) represents the exclusive source of water supply for nearly 500.000 people, including the capital of the state Sincelejo. Although multiple studies have been performed in this area, and a considerable amount of data including piezometric levels, stratigraphy at wells, and pumping tests has been collected; this information is in general fuzzy, heterogeneous and incomplete. The uncertainty in this information affects any quantification of the response of the aquifer. Therefore a methodology able to account for all of the available data and integrate it in a comprehensive conceptual model represents the starting point of our investigation. The uncertainty is accounted for by generating multiple realizations of the aquifer, so that these realizations honor statistical properties of the data. To generate the realizations, two different methods were employed: (1) the well-known Sequential Indicator method (SISIM) which is a semi-variogram based geostatistic method; and (2) the multiple-point geostatistics algorithm SNESIM, based on the concept of training images that represents the database of geological patterns, from which multiple-point statistics are borrowed. Results of the geostatistics simulations show the great ability of MPS to reproduce complex curve heterogeneities.
Flow and transport simulations are performed using two different conceptual models of the Morroa aquifer considering heterogeneities. Steady-state flow and conservative contaminant were assumed. Results show a considerable influence of heterogeneity and the geostatistic method used to generate the conceptual model, i.e. two-points or multiple-point geostatistics. In particular, large differences on the aquifer response distribution were observed that may have an important effect on the design of mid- and large term water management policies regarding both quantity and quality at the Morroa aquifer, as well as on the design of remediation techniques.
Modelling of breakthrough curve in water adsorption on silica gel and zeolite 4A
Authors: Rivera Guerrero Andrés , Rodríguez Niño Gerardo , Bejarano Jiménez Pedro
Published: September 2023

This  paper  presents  the  development  of  a  computational  model  to  simulate  the adsorption of water in a fixed bed, comparing the performance of zeolite 4A and silica gel type ‘A’. A variation of the Langmuir isotherm for zeolite 4A and Tóth isotherm for the silica gel were used; Linear Driving Force (LDF) model was used for adsorption rate with an overall coefficient temperature dependent.  The  model  is  composed  of  five  partial  differential  equations associated  with  mole  fraction  of  water,  temperature,  pressure,  superficial velocity  and  water  loading.  Method  of  lines  (MOL)  was  used  with  the  function ODE15S of Matlab® to solve the system. As response variables the characteristic time interval of the breakthrough curve, asymmetry, maximum temperature  and  pressure  drop,  through  a  two-level  factorial  scheme  were  evaluated.  Adsorbent  was  the  most  influential  variable  on  the  response variables.  Zeolite  has  the  highest  rate  of  adsorption  due  to  the  shape  of  the  adsorption  isotherm,  but  has  a  lower  water  retention  loading  and  increased  resistance to mass transfer.
Application of Airborne LiDAR to the Determination of the Height of Large Structures. Case Study: Dams
Authors: Martínez Marín Rubén , Rejas Ayuga Juan Gregorio , Marchamalo Sacristán Miguel
Published: September 2023

The best way to determine the height of dams is to level the top of the dam applying a geometric leveling, nevertheless this task is very demanding and expensive. The accuracy potential of LiDAR data has significantly improved, these systems can provide accuracy about 2-3 cm level, which could be enough to be applied in the determination of the height of dams. The point acquisition density is an important factor that is involved in the process of determining the height using LiDAR technique. Finally, due to LiDAR technique is based on ellipsoidal heights, it is necessary to transform the coordinates to the official orthometric system. This paper shows the results obtained using low density airborne LiDAR data (0.5 pts/m2) and their validation with post-processed GPS observations. Test results have shown LiDAR can be accurate enough (10-25 cm) to determine the height and to be applied in many civil engineering activities.
Development of a model that determines the optimal production lot size using nonlinear programming and proposal of resolution with a spreadsheet
Authors: Lambán Maria Pilar , Valencia Javier , Royo Jesús
Published: September 2023

To facilitate the cost reduction effort that the global crisis has led in companies around the world, in this paper we propose a model to streamline production, a key area of the supply chain. The proposed model determines the optimal lot size considering activities of different areas of the supply chain, many of which were not previously considered. In order to facilitate the implementation of the proposed model in several companies, including SMEs, we show how to solve this model with a conventional spreadsheet.
Optimization of beam and column sections for compliance drift of reinforced concrete buildings using Artificial Neural Networks
Authors: Arcila Zea Jorge , Riveros Jerez Carlos Alberto , Rivero Jerez Javier Enrique
Published: September 2023

This article presents the application of Artificial Neural Networks (ANN) to estimate optimal sections of beams and reinforced concrete columns for symmetric framed buildings with 1-6 floors taking into consideration the minimum requirements of the NSR-10 related with drift and seismic design. It is also studied the sensitivity of drift to the values of dimensions of beamsand columns providing a better understanding of this relationship in order to obtain optimal designs more quickly, easily and reliably as compared to current used procedures.
Use of fuzzy logic for the administration of a structural control system based on magnetorheological dampers
Authors: Lara-Valencia Luis Augusto , Valencia-Gonzalez Yamile , Vital de Brito Jose Luis
Published: September 2023

Magnetorheological dampers are energy dissipation devices that develop variable control forces useful for the administration of structural systemsunder the effect of dynamic loads. In general, these devices are governed by complex and sophisticated algorithms that required a high processing power. This paper proposes the use of a control algorithm based on fuzzy logic which makes adjustments to the command signal of magnetorheological dampers in a simple and faster way based on the heuristic knowledge of the structure analyzed. From a numerical example was possible to establish that the proposed control project was competent and reliable enough to manage control forces, achieving peak of responses reductions up to 68%.
Physical and mechanical properties of Jatropha curcas seed grown up in Colombia
Authors: Betancur-Prisco Julio Cesar , Mira-Hernández Carolina , París-Londoño Luis Santiago
Published: September 2023

Biodiesel from  Jatropha curcas  seeds is one promissory option in the biofuels  field. This is a crop that develops in tropical countries which can grow on  marginal soils with low irrigation and helps to control the erosion. This bush  grows quickly and produces seeds with approximately 35% oil content and it  does not compete with food crops. However, for the production of biodiesel  from  Jatropha  to be sustainable and profitable it is required research and  technological development at all stages of the production chain. This article  shows the results of a research process that aims the determination of some  significant physical and mechanical characteristics of  Jatropha curcas  seeds.  This  data  are  important,  because  they  provide  necessary  information  in   the  design  of  equipment  and  processes  for   Jatropha  curcas  oil production;  especially, for mechanical oil extraction. As a result of the research process  different properties were determined, for example: compression (2.8 mm)  and energy (332 N.mm)  required for fracture, average dimensions of seeds  (length:  10.8  mm/width:  17.8  mm/thickness:  8.6  mm),  fractions  of  shell  (38%) and albumen (62%) in the seed, moisture content of seed (5.2%), oil  content (29%), calorific value of shell (0.3 MJ/kg) and albumen (0.8 MJ/kg).  All these variables are important parameters in the design of equipment, but  also are useful to evaluate alternative uses for by-products of the oil extraction  process, for example as energy source. Besides, the available information in  Colombia about  Jatropha is not much.
improved direct torque controller applied to an electric vehicle
Authors: Durán Miguel , Guerrero Gerardo , Gudiño Jorge , Claudio Abraham , Alcalá Janeth
Published: September 2023

This paper presents the basic structure, the model, and the design of a torque controller for an electric vehicle (EV). The proposed EV is the transformation of a conventional vehicle with internal combustion engine to electric vehicle, where the original traction system based on an internal combustion engine is replaced by an electric traction system. The controller is based on the technique of direct torque control (DTC) plus a term that compensates the ohmic drop in the stator windings of the induction motor (IM). In order to obtain a constant switching frequency, the space vector modulation (SVM) technique is used to generate the pulses of the inverter. In order to test the performance of the control proposed, numerical results are presented, which are compared with conventional DTC scheme.
Cryptanalysis and improvement of Chen-Hsiang- Shih’s remote user authentication scheme using smart cards
Authors: Martínez-Peláez Rafael , Rico-Novella Francisco , Velarde-Alvarado Pablo
Published: September 2023

Recently, Chen-Hsiang-Shih proposed a new dynamic ID-based remote user authentication scheme. The authors claimed that their scheme was more secure than previous works. However, this paper demonstrates that theirscheme is still unsecured against different kinds of attacks. In order to enhance the security of the scheme proposed by Chen-Hsiang-Shih, a new scheme is proposed. The scheme achieves the following security goals: without verification table, each user chooses and changes the password freely, each user keeps the password secret, mutual authentication, the scheme establishes a session key after successful authentication, and the scheme maintains the user's anonymity. Security analysis and comparison demonstrate that the proposed scheme is more secure than Das-Saxena-Gulati's scheme, Wang et al.'s scheme and Chen-Hsiang-Shih.
Reducing the hardware requirements in FPGAbased controllers: a photovoltaic application
Authors: Ramos-Paja C.A. , Mamarelis E. , Petrone G. , Spagnuolo G. , Vitelli M. , Giral R.
Published: September 2023

Single-phase grid connected photovoltaic systems suffer from voltage oscillations due to the difference between the average power produced by the source and the pulsating instantaneous power injected into the grid. Suchvoltage variations have a detrimental effect on the power production. This paper proposes a solution for mitigating the oscillations at the source terminals minimizing the hardware resources required to implement the technique in a FPGA device, allowing its coexistence with additional control algorithms in a single device. The effectiveness of the approach was experimentally validated, and its FPGA resources requirement was contrasted with commercial IP cores based solutions.
Genetic algorithm for estimating in-situ rock elastic constants by acoustic reflection records
Authors: Montes Luis , Almanza Ovidio , Ghisays Alfredo
Published: September 2023

The elastic properties of rocks can be estimated from the density (ρ), acoustic (Vp), and shear (Vs) wave velocities, whose values establish the reflected wave amplitudes. This paper presents an indirect method to estimate rocks` elastic properties, that uses Vp, Vs, and ρ values supplied by the inversion of acoustic reflection records. Because of the non-uniqueness and non-linear nature of the inversion, the solution must be sought in a search space by minimizing a cost function that measures the error between the observed datum and the inferred one. The search may converge to a local minimum, and then the true global minima may not be reached. Genetic algorithms have proven to be more efficient in finding the optimal solution for this type of search space.
A genetic algorithm coded in Matlab estimates ρ, Vp, and Vs through the inversion of the equation that relates them to the amplitudes and angles of incidence of the acoustic waves. Lamé elastic constant (λ), Poisson›s ratio (ν), and modulus of elasticity (E), compressibility (K) and rigidity (G) can bedeemed from ρ, Vp and Vs.
The algorithm was tested in synthetic data to verify its robustness and stability, and then applied to seismic records showing a good perform in both cases. The presented method has a deeper scope than the refractionmethod, and is applicable to different engineering fields.
Digital classification of cloud masses from weather imagery using machine learning algorithms
Authors: Ramírez-Fernández Salomón Einstein , Lizarazo-Salcedo Iván Alberto
Published: September 2023

Accurate identification of precipitating clouds is a challenging task. In the present work, Support Vector Machines, Decision Trees and Random Forests algorithms were applied to discriminate between precipitating clouds and non-precipitating clouds from a satellite weather image GOES-13 covering the Colombian territory. The objective of this study was to evaluate the performance of machine learning (ML) algorithms for digital classification of cloud masses in terms of thematic accuracy classification using the conventional Mahalanobis algorithm as benchmark. Results show that ML algorithms provide more accurate classification of cloud masses than conventional algorithms. The best accuracy was obtained using Random Forests (RF), with an overall thematic accuracy of 97%. Furthermore, the classification obtained with the RF algorithm was compared pixel-to-pixel with NASA Tropical Rainfall Measurement Mission (TRMM) rainfall estimates, obtaining an overall accuracy of 94%. ML algorithms can therefore be used to improve current precipitating clouds identification methods.
Single-pixel optical sensing architecture for compressive hyperspectral imaging
Authors: Rueda-Chacón Hoover Fabián , Vargas-García Cesar Augusto , Arguello-Fuentes Henry
Published: September 2023

Compressive hyperspectral imaging systems (CSI) capture the threedimensional (3D) information of a scene by measuring two-dimensional (2D) coded projections in a Focal Plane Array (FPA). These projections are then exploited by means of an optimization algorithm to obtain an estimation of the underlying 3D information. The quality of the reconstructions is highly dependent on the resolution of the FPA detector, which cost grows exponentially with the resolution. High-resolution low-cost reconstructions are thus desirable. This paper proposes a Single Pixel Compressive Hyperspectral Imaging Sensor (SPHIS) to capture and reconstruct hyperspectral images. This optical architecture relies on the use of multiple snapshots of two timevarying coded apertures and a dispersive element. Several simulations with two different databases show promising results as the reliable reconstruction of a hyperspectral image can be achieved by using as few as just the 30% of its voxels.
New relation to improve the speed and torque characteristics of induction motors
Authors: Mier-Quiroga Luis Antonio , Benítez-Read Jorge Samuel , López-Callejas Régulo , Segovia-de-los-Ríos José Armando
Published: September 2023

Squirrel cage induction motors are employed in a wide variety of applications.  Operating at constant speed is required in some applications, whereas variation  of this parameter is required in others, as in the provision of mechanical energy  to electrical vehicles. The performance of an electric vehicle is specified by  the  characteristics  of  the  electric  motor.  The  adequate  relation  between  the   voltage  magnitude  and  the  frequency  of  its  power  source  makes  the  motor   satisfy the electric vehicle requirements. The voltage magnitude is a function  of  the  frequency  of  operation.  If  the   V  -  f   relation  is  adequate,  the  motor   speed  response  could  be  improved.  A  new   V  -  f   relation  that  improves  the   speed response of the single squirrel cage induction motor is presented and  is defined by a frequency factor. For motor speeds below the nominal value,  the torque capacity of the motor is preserved with the proposed relationship.
new algorithm for near–singular integration of 3D Boundary Element Integrals for thin–walled elements
Authors: González De León Marco Antonio , Wrobel Luiz Carlos , Martinez Manuel del Jesús
Published: September 2023

The accuracy of the Boundary Element Method (BEM) is strongly dependent on an accurate evaluation of boundary integrals. For thin-walled structures, collocation points and integration elements are often very close, making the kernel of the integrations nearly singular and requiring the use of special numerical integration techniques. In this paper, an effective algorithm is presented for near–singular integration of boundary element integrals applied to three–dimensional thin-walled structures. A combination of Telles’ transformation of variables technique and an adaptive Gaussian quadrature method for regular integrals is used to improve the integration accuracy and to decrease the computation time. The choice of parameters for the technique depends on the relationship between the distance from collocation point to integration element and a reference element length. The proposed integration algorithm is applied to thin plate uniaxial loading and pressurized thin-walled cylindrical shells. The results obtained are in good agreement with theoretical results and the reduction in integration times is significant.
Hydrogeochemical assessment and modeling of Morrosquillo Coastal Aquifer (Sucre-Colombia)
Authors: Betancur Vargas Teresita , Martínez Franco Diana Carolina , Herrera Parra Héctor Mario
Published: September 2023

The  Morrosquillo  coastal  aquifer  is  the  main  water  supply  source  for  the  coastal area of the department of Sucre, Colombia. Antioquia University and the Corporación Autónoma Regional de Sucre –CARSUCRE-, water resource manager in this region, carried out a chemical assessment of the groundwater of this reservoir with the objective of validating the flow conditions and defining  the  model  of  hydrogeochemical  evolution,  which  was  validated using NETPATH inverse modeling software.
Machining process modeling by means of FEM and the use of metamodels with fuzzy logic and linear regression
Authors: Arroyo-Osorio José Manuel , Patiño-Nariño Edgar Andrés , Garzón-Alvarado Diego Alexander , Cortés-Rodríguez Carlos Julio
Published: September 2023

In this work it was implemented a numerical model that simulates the process of orthogonal machining of metallic materials by means of the Finite Elements Method (FEM). For the development of the model, the program Ansys Flotran was used. The material was simulated as a high viscosity fluid crashing against a solid with the cutting edge geometry. From the numerical model it was made a factorial fractionated design of experiments using Minitab software, where the selected input variables were: cutting speed, depth of cut, rake angle, density and viscosity of the fluid. The considered output variables were the velocity of chip and the position of the stagnation point. Two functional metamodels of the FEM model were made, the first one by determining the empirical equations by means of a linear regression. The second was made by establishing functions based on fuzzy logic. The experiments with both metamodels showed that the depth of cut and the rake angle have the greater influence in the chip speed and in the position of the stagnation point. The metamodel based on fuzzy logic presented a better representation between the input and output variables.
Compound digital filter
Authors: Medel Juárez José de Jesús , García Infante Juan Carlos , Duchen Sánchez Gonzalo Isaac
Published: September 2023

This paper describes the identification by the compound digital filter with two estimators involved in the Kalman filter, the first corresponds to stochastic gradient describing the transition function and the second obtains the innovation process gain through fuzzy logic. The filtering process has time constraints for your response occurring before the reference system changes to another state. The results are formally described throughout the document. Auto-Regressive Moving Averages model was proposed (ARMA (1, 1)) as the reference system. The filtering algorithm was developed in MatLab® software getting the integrated filter operations illustrated with its graphics of convergence and response, concluding with brief an analysis of the results.
Contextual dynamic of the software requirements elicitation
Authors: Carrizo Dante
Published: September 2023

The software requirements elicitation from stakeholders has been stated as a key activity influencing strongly on quality of specified requirements and, therefore, of the final development product. For this raison, is undoubtly the necessity to dispose clear guidelines to drive the interrelationship with the owners of the domain information and the needs that require solutions. This work focuses on the model of the elicitation considering the influence of the contextual agents of the process, such as: elicitor, who drive the activity; informant, who possess the relevant information; problem domain, characteristics of the problematic to tackle; and process, characteristics and restrictions of the activity itself. The article analyses the dynamic that relates these factors to select the technique to use in each elicitation session. Finally, the work contributes with a time model of the process and with the representation of the main casuistic of elicitation process.
Active Perturbation Rejection in Motion Control of Milling Machine Tools
Authors: Beltrán Carbajal Francisco , Chávez Conde Esteban , Favela Contrera Antonio , Vázquez Bautista René F.
Published: September 2023

This article deals with the robust control problem of the motion axes of milling machine tools subjected to perturbation forces induced by the metal machining process. A position output feedback control scheme is proposed for robust rejection of unknown cutting and friction perturbation forces and robust tracking tasks of motion trajectories planned for a three-axis milling machine tool. The Coulomb friction, viscous damping and cutting forces are considered as terms of an unknown time-varying disturbance input signal affecting the dynamics of the motion axes of the milling machine. In the motion control design, the perturbation signal is modeled locally by a fourth degree Taylor time-polynomial family. Then, a state observer is designed to estimate the disturbance and velocity signals required for implementation of the proposed motion controllers. Simulation results are included to show the robust performance of the proposed motion control scheme and the fast and effective estimation of the perturbation and velocity signals.
Comparative evaluation of some limnological characteristics of six lentic environments of Colombia
Authors: Hernández Esnedy , Aguirre Néstor , Palacio Jaime , Ramírez John Jairo , R. Duque Santiago , Guisande Cástor , Aranguren Nelson , Mogollón Martha
Published: September 2023

This study proposed to evaluate some limnological characteristics of six lentic environments in Colombia located at the altitudinal gradient in Caribbean, Andean and Amazon regions. These environments have different origin, type and physic, chemic and climatic variability. This is clear evidence that equatorial environments, like the ones found in Colombia presents variation among them and requires a local approach linked with regional and geographical patterns which influences the limnology of system. The studied environments correspond to high mountain lakes and lowland floodplain, which were monitored in different hydrological seasons and times and the results were reviewed with respect to their environmental and trophic differences. Altitudinal location and therefore the type, origin, morphometry and hydroclimatic conditions which affects the six systems, promotes significant changes in the precipitation regime, temperature, level and water transparency, nutrients concentrations, dissolved oxygen, pH, electrical conductivity and chlorophyll a.
Evaluation of chemical pretreatments for enzymatic hydrolysis of lignocellulosic residues cassava (Manihot esculenta Crantz)
Authors: Niño López Lilibeth , Acosta Cárdenas Alejandro , Gelves Zambrano Ricardo
Published: September 2023

The effect of different chemical pretreatment with sulfuric acid (H2SO4), sodium hydroxide (NaOH) and hydrogen peroxide (H2O2) were evaluated by quantifying total reducing sugars produced during enzymatic hydrolysis step of lignocellulosic residues cassava (Manihot esculenta Crantz) and lignin removal percentage after pretreatment. The amount of waste used (1 to 5%) (w/v) in different particle sizes (1.18 and 0.6 mm) were pretreated separately (leaves and stems) with H2SO4, NaOH and H2O2 at varying concentrations (1 and 5%) (w/v). Plant residues were hydrolyzed with enzyme Accellerase 1500 with 50 ° C, pH 5 and 140 rpm. NaOH pretreatment enables higher total reducing sugars released during enzymatic hydrolysis (3.7 g/L) followed by leave pretreatments using H2SO4 (2.11 g/L) and H2O2 (1.54 g/L). Sugar concentrations were lower in stem pretreatments.
Design, construction and tests of an automatic prototype for composting
Authors: Longoria Ramírez Rigoberto , Oliver Salazar Marco Antonio , Torres Sandoval Julio , González Rubio Sandoval José Luis , Maximiliano Méndez Gerardo
Published: September 2023

In this work the design, prototype construction and experimental validation of a composter is presented. The prototype performs the composting process of organic solid residues in an automatic form and the design is based on the treatment residues generated at home and on the composting proper process requirements to be carried out in a suitable way. This device has the property of processing, in a continuous way, 3 kg of solid organic residues per day. The residues introduced in the prototype remain inside for a 30-day period, time in which they are transformed into compost. The control of the prototype is achieved  by  a  microcontroller,  having  the  following  functions;  temperature  control,  air  flow  provision(aerobic  decomposition),  material  stirringfor a  uniform  decomposition  and  material  movement  over  the  band  (from  the  entrance  up  to  the  exit  of  the  device)  to  achieve  a  continuous  processing  of  the  residues.  The  resulting  tests  provided  a  compost  with  a  dun  obscure  color, without smells, and at room temperature. All of these conditions were indicators of a stable compost.
Ibrutinib in therapy of Waldenstrom’s macroglobulinemia: literature review and clinical observation
Authors: Ryabukhina Yu. E. , Zeynalova P. A. , Timofeeva O. L. , Abbasbeyli F. M. , Valiev T. T. , Zhukov A. G. , Fedotov V. V.
Published: September 2023

Waldenstrom’s macroglobulinemia (WM) is an indolent B-cell lymphoproliferative disorder which despite achieved successes in therapy is characterized by recurrences and refractoriness. Study of molecular biology allowed to use targeted drugs, in particular ibrutinib which acts through suppression of B cell receptor signaling pathway by inhibiting Bruton’s tyrosine kinase. In several large trials, ibrutinib demonstrated its effectiveness and manageable toxicity profile both in patients with newly diagnosed and recurrent/refractory WM. A clinical observation of a patient with WM is presented. Due to minimal response during previous treatment, the patient currently is undergoing monotherapy with ibrutinib with positive antitumor effect, satisfactory tolerability, and absence of significant adverse events. The effect of ibrutinib on humoral immunity during the follow up period was evaluated.
Psychological Features of Self-Regulation of Persons with Manifestations of Spiritual Crisis
Authors:   Taras Shevchenko National University of Kyiv, Ukraine, Kyrylenko Taisa , Verpeta Svitlana ,   Taras Shevchenko National University of Kyiv, Ukraine
Published: September 2023

B a c k g r o u n d . The relevance of studying the problem of the role of self-regulation while person experiencing a spiritual crisis, which is the key to the harmonious development of their potential in modern conditions, is substantiated. Approaches to defining the content of the concepts of self-regulation, spirituality, and spiritual crisis are analyzed. The main components of self-regulation and their content are considered. The understanding by Ukrainian and foreign authors of spirituality, types and tendencies of the spiritual crisis is analyzed. M e t h o d s . A study was conducted based on the characteristics of the ratio of the components and the level of self-regulation with the expe¬rience of a spiritual crisis of 50 people aged 24 to 68, 25 of them are Ukrainians and 25 Poles. In order to determine the peculiarities of self¬regulation, the technique "Style of self-regulation of behavior" by V.I. Morosanova was chosen, which allows to reveal the expressiveness of the level of self-regulation and its main components: planning, modeling, programming, etc. Method of "Spiritual Crisis Diagnostics" by L.V. Shutova and A.V. Lyashchuk, which diagnosed indicators of progressive and regressive tendencies of spiritual crisis and existential vacuum was used to study the signs of spiritual crisis. R e s u l t s . According to the results of the empirical study, the dominance (64 %) of the average level of self-regulation was revealed. It was also found that the group with a low level of self-regulation, with insufficient formation of the components of modeling and programming, is charac¬terized by a greater expressiveness of experiencing a spiritual crisis with a predominance of a progressive tendency. С o n c l u s i o n . The results of the correlation analysis proved the inverse relationship of the components of self-regulation of programming and modeling with the features of experiencing a spiritual crisis, existential vacuum, in particular. Conclusions regarding age and national charac¬teristics of self-regulation of personality with manifestations of spiritual crisis are formulated.
Psychological Aspect of Legal Impact
Authors: Berg L. N.
Published: September 2023

The paper considers the phenomenon of legal impact as a socio-psychological legal phenomenon. The subject of law is in the core of the epistemological analysis of the psychological aspect of legal impact. The subject is the only component able to actively respond to legal impact. An active reaction is expressed as participation in legal impact, obtaining and processing legal information, modeling one’s own behavior in accordance with the information received. In the paper, the author reviews some research in this field and concludes that there is a need to strengthen interdisciplinary interaction between the theory of law and psychological sciences in a quantitative and qualitative way. The absence of such studies determines the relevance of this study. The main personality traits determining the strategy of its behavior, the influence of external and internal factors are determined. In the system of social communication, a person is an active self-organizing entity that transmits and transits legal information to subjects of other levels of social interaction. The assessment of the significance of legal information and the choice of a decision on its use is carried out by the subject independently, using their own social experience and psychological properties. The mechanism of psychological legal impact has been studied. Within the framework of the paper, the author substantiates the need to introduce the concept of «directed behavior» into scientific circulation, which should be understood as the state of the subject experiencing legal influence, as well as the consequences in the form of certain acts of the subject mediated by legal impact, the process of exchange of significant legal information between participants in social communication. The role of legal awareness and legal information in the mechanism of psychological legal impact is determined.
Probing AGN Accretion Flows With Multi-Wavelength Time-Domain Observations
Authors:   , Yu Weixiang , Richards Gordon T.
Published: September 2023

At UV/optical wavelengths, the luminosity of Active Galactic Nuclei (AGNs) varies stochastically on timescales ranging from hours to years. This stochastic variability originates from AGN's accretion disk and provides unique information about its inner workings. It has recently been shown that AGN UV/optical variability exhibits different characteristics at short and long timescales. This dissertation utilizes the approach of directly modeling AGN UV/optical light curves as a noise-driven damped harmonic oscillator (DHO) process. This approach enables us to connect short and long-term variability and probe the accretion flows in AGNs. The DHO process is a second-order continuous-time autoregressive moving-average process--a statistical model commonly used to forecast the stock market. We carry out two investigations in this study: 1) we apply the DHO model to ~ 12,000 AGNs with 8-years-long ugriz light curves collected from the Sloan Digital Sky Survey (SDSS); 2) we repeat the process for ~ 24,000 AGNs with combined gri light curves from SDSS and the PanSTARRS1 (PS1) survey. The distributions of DHO fits obtained in these two investigations are broadly consistent, demonstrating that AGNs occupy a unique part of the DHO parameter space. We find that: 1) the best-fit DHO parameters correlate with the probed rest-frame wavelength ([lambda] RF ) and the fundamental properties of our modeled AGNs; 2) the modeled long-term variability at [lambda] RF > 2800A might be contaminated by the Balmer diffuse continuum external to the accretion disk; 3) the long-term characteristic variability timescale extracted by the DHO exhibits a wavelength dependence that is closest to the theoretical prediction when compared to similar timescales extracted using other methods. We demonstrate that the DHO process is a viable choice for directly modeling AGN's UV/optical variability. The upcoming all-sky time-domain survey, Rubin Observatory's Legacy Survey of Space and Time (LSST), will benefit from this approach, given LSST's superior light curves.
Caring for Caregivers: The Landscape of Paid Care Work in Latin America and the Caribbean
Authors: Fabiani Beatrice
Published: September 2023

Paid care work will represent an important source of employment in coming decades, as care dependence becomes more prevalent, care needs evolve, and the structure of households changes. But there is little systematic data on the care economy for paid caregivers in Latin America and the Caribbean. This report aims to fill this knowledge gap by quantifying the paid care workforce in the region and describing its sociodemographic and economic profile in 17 countries. Using the most recent pre-pandemic microdata from labor and household surveys, the report examines the care economy for care workers who serve children and adults. The study concludes that there are approximately 8.9 million paid caregivers in the region, including 5.8 million paid workers who take care of children and 3.1 million who look after older people and people with disabilities. Most professionals in the sector are women in their early forties with a secondary-level education and with limited access to social protection benefits. This paper contributes to the ongoing discussion on paid and unpaid care work by emphasizing the importance of supporting a thriving workforce in the region while redistributing the burden of care in all dimensions of human life.
A Correlation of Tumour Budding and Tumour-Stroma Ratio with Clinicopathological Factors in Oral Squamous Cell Carcinoma
Authors: Verma Leena , Singh Kanika , Pujani Mukta , Jain Manjula , Chandoke RK , Agarwal Charu , Chauhan Varsha , Raychaudhuri Sujata , Jain Avani
Published: September 2023

Objectives: This study aimed to analyse the association of tumour budding (TB) and tumour-stroma ratio (TSR) with clinicopathological parameters that can be easily viewed on routine haematoxylin and eosin (H&E)-stained slides to provide an easy and cost-effective method for prognosticating oral squamous cell carcinoma (OSCC). Methods: This study was conducted at the ESIC Medical College and Hospital in Faridabad, India, from July 2022 to October 2022. In patients with histologically diagnosed OSCC, TB and TSR were evaluated via routine H&E-stained sections and correlated with clinicopathological parameters. Statistical analysis was performed using Chi-squared test. Results: A total of 50 patients were included. The mean age of participants was 61 ± 12.72, and the male-to-female ratio was 7.1:1. Most of the tumours were located on the tongue (46%), followed by the buccal mucosa (26%), gingivobuccal sulcus (12%) and retromolar trigone (8%). The palate and alveolus were the other sites involved, constituting 4% each. TB and TSR were both found to be significantly associated with the tumour grade, lymph node metastasis and tumour size. A highly significant correlation was also found between TB and TSR (P = 0.001). Conclusions: Both TB and TSR can be easily evaluated on routine H&E sections; they are highly reproducible and were found to be reliable independent prognostic markers in OSCC. Therefore, this simple and cost-effective method of prognostication, which is currently lacking in clinical practice, will help clinicians to identify patients with poor prognosis and thus individualise their treatment plan.
Keywords: Tumour microenvironment; Oral Squamous Cell Carcinoma; India.