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Características del liderazgo pedagógico del directivo docente de la I.E. de Jesús del municipio de Concordia
Get PDFEsta investigación abordó el liderazgo pedagógico, específicamente el liderazgo directivo, su papel dentro del proceso pedagógico de la institución educativa está justificado por la relevancia que tiene en la gestión curricular, entre otras funciones, pues permite que las instituciones educativas - I.E marchen adecuadamente y alcancen mayores logros para todos los estudiantes. El objetivo consistió en identificar las características del liderazgo pedagógico del directivo docente de la I.E de Jesús del municipio de Concordia. Para esto se consideró una investigación enmarcada dentro del enfoque cualitativo de tipo descriptivo, el método fue estudio de caso. Los instrumentos que se utilizaron fueron, la entrevista, el diario de campo y el grupo focal. Con base en los resultados obtenidos en las entrevistas se destacan aspectos importantes de la comunicación y el liderazgo, vinculados a la gestión administrativa de la I.E. La investigación muestra la importancia que tiene el liderazgo pedagógico del directivo docente como elemento clave en el desarrollo y funcionamiento pedagógico-curricular de la I.E.This research addressed pedagogical leadership, such as one that focuses on the directive role, specifically on his role in the educational process on the educative institution; the relevance it's justified for this process for function properly on the institutions to and achieve greater achievements for all students. The objective was to identify the pedagogical leadership from the educative director of the Educative Institution of Jesus from the Concordia municipality. For this, was considered an investigation framed within the qualitative approach of descriptive type, the method was a study case. The instruments used were interview, field diaries and focus group. Based on the interview results obtained, important aspects of communication and leadership were highlighted, linked to the development processes on the educative institution. The research shows the importance on a pedagogical leadership of the teaching director as a key element within the institution.Magíster en EducaciónMaestrí
La competencia discursiva en estudiantes de segundo grado potenciada a través de una estrategia didáctica basada en textos multimodales
Get PDFLas habilidades de expresión oral determinan las relaciones cotidianas del sujeto, mediadas por el lenguaje, en su interacción con otros y con el contexto mismo en el que se desenvuelve; lo que inscribe al discurso oral en la categoría de práctica social. De este reconocimiento se deriva el interés de la presente investigación de campo, cuyo propósito central giró en torno a potenciar la competencia discursiva de un grupo de veintiséis estudiantes de segundo grado, mediante una estrategia didáctica basada en textos multimodales. La investigación tuvo un enfoque mixto, para el momento cuantitativo se acudió a un diseño cuasiexperimental, secuencial con mediciones pretest y postest, los datos fueron analizados desde dos componentes de la estadística, el descriptivo y el inferencial y el instrumento utilizado fue una lista de observación. El segundo momento fue el cualitativo que estuvo determinado por un diseño de Investigación Acción - Participación y de estudio de caso, la información fue interpretada por medio de un análisis semiodiscursivo y se emplearon como instrumentos una matriz de observación y descripción para cada tipo de texto multimodal, una matriz de diseño analítico y el diario pedagógico a partir del relato experiencial de la docente. Como resultado general del análisis, se determinó que la perspectiva multimodal propició transformaciones favorables en la competencia discursiva de los participantes, gracias a que articula variadas formas de expresión: visual, audiovisual e iconográfica, por medio de las cuales se generaron intercambios verbales entre los estudiantes. Lo que activó procesos discursivos a través de su puesta en escena en el contexto del aula propiciando múltiples situaciones de comunicación.Oral expression skills determine the daily relations of the subject mediated by language in its interaction with others and with the context itself in which it operates, which inscribes towards oral discourse in the category of social practice. From there, the interest of this research arises whose central purpose was to enhance the discursive competition of a group of twenty-six second grade students of elementary school through a didactic strategy based on multimodal texts. The investigation had mixt approach integrated for two moments, first the quantitative moment that revolved around a quasi-experimental design, a sequential nature and pretest - posttest measurements, the data were examined from two components of statistics, the descriptive and the inferential one and the instrument used was an observation list. Second the qualitative moment was established for an Action-Participation research design and a case study, the information was interpreted through semiodiscursive analysis and the instrument utilized were an observation and description matrix for each type of multimodal text, an analytical design matrix and the pedagogical diary from based on the teacher's experiential account. As a general result of the analysis, it was determined that the multimodal perspective led to favorable transformations in the discursive competence of the participants, thanks to the articulation of various forms of expression, written, visual and iconographic, through which verbal exchanges were generated among the students, which activated discursive processes through its staging in the context of the classroom leading to multiple communication situations.Magíster en EducaciónMaestrí
Corolario sobre jóvenes, el último eslabón de una cadena de violencias
Get PDFLos jóvenes aparecen como un actor social para el Estado colombiano cuando
constituyen un problema a resolver, especialmente por el recrudecimiento de
la violencia derivada del narcotráfico, que inauguró el uso de hombres muy
jóvenes para asesinar, desde reconocidas figuras públicas hasta personas
del común que se constituyen en objetivo bajo la justificación del llamado
“ajustes de cuentas”. Los sicarios y las pandillas juveniles empezaron a cobrar
importancia en las zonas pobres, marginalizadas, excluidas y tugurizadas de
diversas ciudades colombianas; desde capitales hasta municipios menores, al
erigirse como una de las opciones más rentables, atractivas e interesantes
para una generación sin futuro
Determinantes de deserción de los estudiantes universitarios : caso del Politécnico Grancolombiano
Get PDFEl principal objetivo del presente artículo fue identificar aquellos factores que influyen en el riesgo de deserción de los estudiantes universitarios. Se trabajó con una muestra de 476 estudiantes con información académica, institucional y socioeconómica, entre otras. Se aplicó una regresión logística para identificar las variables de mayor impacto en el riesgo de la deserción y así proponer acciones que ayuden a mitigar este fenómeno. Se encuentra entre los resultados más importante que los estudiantes más jóvenes de la jornada diurna son quienes tienden a abandonar sus estudios durante los primeros cuatro semestres. El modelo predice correctamente el 84% de los casos; adicionalmente, el efecto que ejerce la edad de ingreso, el número de semestres cursados, el promedio acumulado, el total de créditos aprobados, la financiación de estudios y la obtención de auxilios educativos con la institución es superior si se compara con otros factores analizados en el presente estudio.The main objective of this article was to identify those factors that influence the risk of desertion of university students. We worked with a sample of 476 students with academic, institutional and socioeconomic information, among others. It was applied a logistic regression to identify the variables of greater impact in the risk of desertion, and this way, it was proposed actions to help mitigate this phenomenon. It is among the most important results that the youngest students of the daytime are those who tend to abandon their studies during the first four semesters. The model correctly predicts 84% of the cases; additionally, the effect of the entrance age, the number of semesters studied, the accumulated average, the total of approved credits, the financing of studies and the obtaining of educational aids with the institution is higher if it is compared with other factors analyzed in this study.Magíster en MercadeoMaestrí
Platinum vs transition metal carbide surfaces as catalysts for olefin and alkyne conversion: Binding and hydrogenation of ethylidyne
No full textThe development of heterogeneous catalysts with activity for the hydrogenation of unsaturated hydrocarbons is of economic importance. Ethylene (C2H4) and acetylene (C2H2) are probe molecules useful to understand the hydrogenation mechanisms, where the most studied surfaces are Pt(111) and Pd(111), however, they have a limited activity due to the formation and accumulation of ethylidyne (CCH3) species. Therefore, alternative catalysts should be developed to limit and/or avoid the formation of ethylidyne on the surface. Transition metal carbides has been reported as alternative catalysts, with the additional advantage of lower prices. The thermodynamics of ethylidyne binding and its transformations on ?-MoC(001), TiC(001), and ?-Mo2C(100) surfaces are studied by means of periodic DFT. The results indicate that ethylidyne could be transformed to ethyl and ethane on ?-MoC(001) and TiC(001) surfaces, which are relevant species to the Horiuti-Polanyi mechanism. Therefore, these surfaces could be an alternative to Pt(111) and Pd(111), since ethylidyne could be transformed to other species, avoiding or limiting their deactivation. Conversely, ethylidyne cannot be transformed to vinyl (CHCH2) or ethylene in a Horiuti-Polanyi-like mechanism; then, it is not thermodynamically feasible to use any of the studied surfaces in the selective hydrogenation of acetylene, since ethylidyne accumulation could poison the surfaces. © Published under licence by IOP Publishing Ltd
Innovation management models-A literature review
No full text"This paper deepens the innovation process model and innovation management model. It states that the latter contains management variables not analyzed in depth, in the literature on innovation models. It also presents six proposals on models of innovation management in companies and sectors. The methodology was based on an in-depth review of 73 documents obtained via Scopus which contained the search terms ""innovation management"" and ""model"". These documents were analyzed using Vantage Point software. The majority of authors are in agreement about innovation models and their emphasis on the ""process of innovation"". However, a similar consensus was not to be found regarding ""innovation management models"". This represents a barrier to theoretical analysis. Yet it is also an opportunity to propose best practices, identify patterns, and establish theories that may become the basis of future models. © 2019 Primrose Hall Publishing Group.
Carbonation study in a cement matrix with carbon nanotubes
No full textCarbon nanotubes as additions in Portland cement based matrices have a great potential to improve the mechanical properties of mortars and concretes; however, little work has been done regarding the effect that they have on the chemical durability of the cement matrix and reinforcing steel. In this work, carbon nanotubes are dispersed in water solution with Triton X 100 surfactant and blended in Portland cement mortars. A sharp decrease in compression resistance was observed at all curing ages (7, 14, 21 and 28 days) while a depth increase in the carbonation profile was found, which is associated with a decrease in the matrix durability. © Published under licence by IOP Publishing Ltd
Solution of A P and S wave propagation model using high performance computation
No full textThe propagation of seismic waves is affected by the type of transmission media. Therefore, it is necessary to solve a differential equation system in partial derivatives allowing for identification of waves propagating into an elastic media. This paper summarizes a research using a partial differential equation system representing the wave equation using the finite differences method to obtain the elastic media response, using an staggered grid. To prevent reflections in the computational regions, absorbent boundaries were used with the PML method. The implementation of the numerical scheme was made on two computational architectures (CPU and GPU) that share the same type of memory distribution. Finally, different code versions were created to take advantage of the architecture in the GPU memory, performing a detailed analysis of variables such as usage of bandwidth of the GPU internal memory, added to a version that is not limited by the internal memory in the graphic processing unit, but rather by the memory of the whole computational system. © 2019 Ecopetrol S.A.. All rights reserved
Research opportunities for supplier selection: An analysis from literature reviews
No full textThis article aims to identify different literature reviews of supplier selection to analyze the topics addressed in these documents, and suggest research opportunities for future literature reviews in issues that have not been addressed in the literature or require a deeper approach. This study states that the majority of existing literature reviews focus on the analysis of supplier selection methods and criteria, and uncertainty management, environmental management, and sustainability have been addressed in recent years. As a conclusion, it is suggested to focus future literature reviews on topics such as risk management, statistical methods, methods applied to industry sectors, implementation of supplier selection to small and medium enterprises, comparative analysis of solution methods performance, and the adaptation of solution methods from areas different to supplier selection. Likewise, it is recommended to continue updating literature reviews related to green and sustainable supplier selection, and uncertainty management in supplier selection, especially for the last 3-5 years. Copyright © 2019. Jose Alejandro CANO and Carlos Javier AYALA
Two Novel Approaches Based on the Thompson Theory and Shape Analysis for Determination of Equilibrium Structures of Nanoclusters: Cu8, Ag8 and Ag18 as study cases
No full textTwo new efficient methods for finding stable atomic clusters are introduced in this work. A purely algebraic and geometrical approach based on shape analysis provides a consistent set for optimization of structures which converge to local and global low-energy configurations. A second proposal based on the Thompson theory gives also candidate structures which became in equilibrium faster than the standard stochastic search models. The performance of the approaches is compared in three metal atomic clusters involving magic numbers. Both methods find the global and local low-energy structures reported in literature, but also obtain new structures. For Cu8, Ag8 and Ag18 the shape analysis method provides more structures than the approach based on Thompson theory. © Published under licence by IOP Publishing Ltd