Mostrando ítems 72-79 de 79

Teaching the wave concept through problem-based learning

Rojas Suárez, Jhan Piero; Vergel Ortega, Mawency; GALLARDO PÉREZ, HENRY DE JESÚS (Journal of Physics: Conference SeriesMadrid , España, 2020-11-04)

The wave movements can be studied from autonomous work done by the student since they are processes in which he can appreciate and understand how the transmission of energy from one part to another without transfer of ...
Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids

Valencia, Guillermo; Rojas Suárez, Jhan Piero; Acevedo Peñaloza, Carlos Humberto (Applied SciencesPekin , China, 2019-10-25)

This paper presents a thermo-economic analysis of a simple organic Rankine cycle (SORC) as a waste heat recovery (WHR) systems of a 2 MW stationary gas engine evaluating different working fluids. Initially, a systematic ...
Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau

Rojas Suárez, Jhan Piero; Molina-Gómez, Fausto; Ruge Cárdenas, Juan Carlos (Journal of Physics: Conference SeriesLondres, Reino Unido, 2018-11-29)

Thixotropy is a distinctively rheological (time-dependent) phenomenon, which is found in many complex materials, especially colloidal systems as fine-grained soils. Clays are materials that can recover their initial strength ...
TIC en la enseñanza de las ecuaciones diferenciales de primer orden

Rincón Leal, Olga Lucy (Logos Ciencia & TecnologíaBogota ,Colombia, 2016-12-21)

Esta investigación se ha propuesto evaluar las relaciones entre los elementos que intervienen en el proceso de aprendizaje de ecuaciones diferenciales de primer orden, antes y después de la incorporación de herramientas ...
Understanding of derivative as an essential part of the study of differential calculus

Vergel Ortega, Mawency; Pabón Gómez, Jorge Angelmiro; Rojas Suárez, Jhan Piero (Journal of Physics: Conference SeriesMadrid , España, 2019-09-30)

The research aimed to design a teaching strategy and analyze benefits of its implementation in the use of technologies like GeoGebra and interactive materials that offers the web as enabling tools and teaching as mediation ...
Validez de instrumento CALA para evaluar asesorías académicas virtuales

Vergel Ortega, Mawency; Martínez Lozano, José Joaquín; Rincón Leal, Olga Lucy (Horizontes PedagógicosBogota , Colombia, 2016-10-11)

El artículo presenta la validez y fiabilidad de instrumento para medir la calidad de las asesorías académicas CALA, utilizando dimensiones del modelo de calidad de servicio servqual. Su objetivo es evaluar la percepción ...
Validez de instrumento para medir el aprendizaje creativo

Vergel Ortega, Mawency; Martínez Lozano, José Joaquín; Nieto, José Francisco (Comunicaciones En EstadísticaBogota , Colombia, 2016-09-29)

El artículo presenta la validez y fiabilidad del instrumento CREA, cuyo objetivo es medir el aprendizaje creativo de estudiantes que cursan programas académicos de pregrado en el municipio de Cúcuta, Colombia. Sigue un ...
Validity of microrubri, instrument to measure the development of competences in mathematics

Vergel Ortega, Mawency; Martínez Lozano, José Joaquín; Ortega Sierra, Alvaro (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-02-13)

The article presents the validity and reliability of the MICRORUBRI instrument based on rubrics, with problems applied to engineering that allow analyzing situations in real context, as well as the generation, visualization ...

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Teaching the wave concept through problem-based learning
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Rojas Suárez, Jhan Piero | 2020-11-04

The wave movements can be studied from autonomous work done by the student since they are processes in which he can appreciate and understand how the transmission of energy from one part to another without transfer of matter is. Problem-based learning constitutes a good alternative to study the concept of waves since it sequentially leads the student to structure the knowledge to use it in the context, to develop effective processes of reasoning, to develop self-directed learning skills and to motivate him/her to learn, together with the development of the capacity to work in a team and it favors the development of the mathematical physical thought. The research is developed from the multi-method methodological approach developing in-depth interviews to teachers and knowledge tests to students with the purpose of establishing both pre-knowledge and initial situations for structuring the pedagogical intervention and the evaluation of its results. The pedagogical intervention is structured on a quasi-experimental design in which the strategy of problem-based learning is applied to the teaching and learning of physics and is compared with the traditional methodology. The research allows us to conclude that applying the problem-based learning methodology to physics teaching, we obtain better educational yields than with traditional teaching, while it generates a greater motivation and a greater interest in learning. It also allows the student to integrate the knowledge into his or her context, visualize the usefulness of learning and apply knowledge to the solution of problems in his or her environment, in other words, it allows the student to achieve significant learning and therefore a development of mathematical physical thinking.

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Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids
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Valencia, Guillermo | 2019-10-25

This paper presents a thermo-economic analysis of a simple organic Rankine cycle (SORC) as a waste heat recovery (WHR) systems of a 2 MW stationary gas engine evaluating different working fluids. Initially, a systematic methodology was implemented to select three organic fluids according to environmental and safety criteria, as well as critical system operational conditions. Then, thermodynamic, exergy, and exergo-economic models of the system were developed under certain defined considerations, and a set of parametric studies are presented considering key variables of the system such as pump efficiency, turbine efficiency, pinch point condenser, and evaporator. The results show the influence of these variables on the combined power of the system (gas engine plus ORC), ORC exergetic efficiency, specific fuel consumption (∆BSFC), and exergo indicators such as the payback period (PBP), levelized cost of energy (LCOE), and the specific investment cost (SIC). The results revealed that heat transfer equipment had the highest exergy destruction cost rates representing 81.25% of the total system cost. On the other hand, sensitivity analyses showed that acetone presented better energetic and exergetic performance when the efficiency of the turbine, evaporator, and condenser pinch point was increased. However, toluene was the fluid with the best results when pump efficiency was increased. In terms of the cost of exergy destroyed by equipment, the results revealed that acetone was the working fluid that positively impacted cost reduction when pump efficiency was improved; and toluene, when turbine efficiency was increased. Finally, the evaporator and condenser pinch point increased all the economic indicators of the system. In this sense, the working fluid with the best performance in economic terms was acetone, when the efficiency of the turbine, pinch condenser, and pinch evaporator was enhanced

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Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau
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Rojas Suárez, Jhan Piero | 2018-11-29

Thixotropy is a distinctively rheological (time-dependent) phenomenon, which is found in many complex materials, especially colloidal systems as fine-grained soils. Clays are materials that can recover their initial strength after remoulding. The estimation of such recovering allows optimising the designs of geotechnical structures and then reducing the construction costs. This paper presents the results of a study that evaluates the thixotropy phenomenon of clayey soils. The work methodology involved an experimental plan composed of five phases: (i) extraction of samples; (ii) physical and mechanical characterisation of the undisturbed samples; (iii) remoulding of samples after testing; (iv) storage of remoulded samples; and (v) evaluation of undrained shear strength recovering for 0, 15, 30, and 60 days after remoulding. Undisturbed samples were collected using Shelby tube from the municipality of Madrid, near Bogotá, in Colombia. Results were analysed in terms of sensitivity degree because this parameter allows estimating the shear strength recovering. Findings show that clayey soils from lacustrine deposits of Bogota high plateau do not loss completely all of their original mechanical properties after remoulding and exhibit a medium sensitive behaviour. Conclusions indicate there is a recovering of undrained shear strength along the time, in which the samples will recover their original state about one year after remoulding.

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TIC en la enseñanza de las ecuaciones diferenciales de primer orden
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Rincón Leal, Olga Lucy | 2016-12-21

Esta investigación se ha propuesto evaluar las relaciones entre los elementos que intervienen en el proceso de aprendizaje de ecuaciones diferenciales de primer orden, antes y después de la incorporación de herramientas tecnológicas de apoyo. Se sigue un diseño de estudio descriptivo donde se determina la importancia de la tecnología en el aula de clase y cómo esta puede llegar a generar un cambio de actitud en los estudiantes. La muestra estuvo conformada por 40 estudiantes en edades entre 18 y 23 años. El instrumento de recolección de información consistió en una escala de actitudes que se aplicó al inicio y final del experimento. Los resultados muestran que el uso de las TIC como instrumento mediador, produce un cambio de actitudes positivas y favorables hacia las aplicaciones de las ecuaciones diferenciales de primer orden, apoyando la adquisición de conocimientos, logrando estimular la creatividad de los estudiantes y contribuyendo en el diseño de nuevas estrategias metodológicas en el ámbito de la Educación Superior.

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Understanding of derivative as an essential part of the study of differential calculus
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Vergel Ortega, Mawency | 2019-09-30

The research aimed to design a teaching strategy and analyze benefits of its implementation in the use of technologies like GeoGebra and interactive materials that offers the web as enabling tools and teaching as mediation is aimed at students in grade 11 middle education. Tests pre-test and post-test and two experimental groups were applied control. It was verified that the teaching strategy has a positive influence on learning the experimental group improved the level of understanding of the concept of derivative and thus academic performance, in contrast to the control group to which is applied the traditional methodology.

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Validez de instrumento CALA para evaluar asesorías académicas virtuales
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Vergel Ortega, Mawency | 2016-10-11

El artículo presenta la validez y fiabilidad de instrumento para medir la calidad de las asesorías académicas CALA, utilizando dimensiones del modelo de calidad de servicio servqual. Su objetivo es evaluar la percepción de la calidad de asesorías académicas a través de plataforma virtual en instituciones de educación básica. La metodología sigue estudio descriptivo de validación de escalas multidimensionales, diseño cuasi-experimental, técnica análisis factorial. La muestra estuvo constituida por 1117 estudiantes de instituciones de educación básica, con edad promedio de 9.6 años. Resultados: 24 indicadores en dimensiones satisfacción en disponibilidad de contenidos-recursos didácticos, seguimiento-retroalimentación, accesibilidad, comodidad-confort, consistencia interna adecuada α=0.9 (Conbrach, 1951), coeficiente de correlación intraclase global 0.8 (IC del 95%, 0.78-0.82) e índices de Kappa (Cohen, 1960), superiores a 0.78 muestra alto acuerdo entre expertos.

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Validez de instrumento para medir el aprendizaje creativo
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Vergel Ortega, Mawency | 2016-09-29

El artículo presenta la validez y fiabilidad del instrumento CREA, cuyo objetivo es medir el aprendizaje creativo de estudiantes que cursan programas académicos de pregrado en el municipio de Cúcuta, Colombia. Sigue un diseño de estudio descriptivo de validación de escalas multidimensionales a través de análisis factorial, validez de constructo, y facial. La población estudio la constituyen 23564 estudian tes de programas de pregrado ofertados por universidades del municipio de San José de Cúcuta, constituida la muestra por 595 estudiantes con edades comprendidas entre 18 y 25 años. Se obtuvo una escala de 35 ítems. El análisis factorial arrojó dimensiones de práctica pedagógica orientada al liderazgo, pensamiento creativo, satisfacción emocional, independencia, actitud creativa, productividad, competencias en liderazgo, motivación; la consistencia interna fue adecuada (alfa de Cronbach 0,72-0,95), coeficiente de correlación intraclase global de 0,967 (IC del 95 %, 0,933-0,984), promedio de diferencias en sumatoria de ítems -1,3 (DS: 8,5) e índices de Kappa superiores a 0,9, lo cual muestran un alto acuerdo entre expertos. Se concluye que CREA es un instrumento válido y confiable para el contexto Cúcuta, Colombia.

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Validity of microrubri, instrument to measure the development of competences in mathematics
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Vergel Ortega, Mawency | 2019-02-13

The article presents the validity and reliability of the MICRORUBRI instrument based on rubrics, with problems applied to engineering that allow analyzing situations in real context, as well as the generation, visualization of surfaces, planes and vectors; its objective is to evaluate the development of competences in vector calculus in students who are enrolled in undergraduate engineering programs in the Municipality of Cúcuta, Colombia. It follows a design of descriptive study of validation of multidimensional scales through factorial analysis, construct validity, and facial. The study population was students of undergraduate programs of engineering, administration and agricultural sciences with ages between 17 and 20 years in the city of Cúcuta, Colombia, constituted the sample by 500 students. Results: A scale of 35 items was obtained. The factor analysis revealed dimensions of pedagogical practice oriented to leadership, creative thinking, emotional satisfaction, independence, creative attitude, productivity, leadership competencies, motivation; internal consistency was adequate (Cronbach alpha 0.72 – 0.95), global intraclass correlation coefficient of 0.97, average differences in sum of items -1.2 (SD: 7.5) and Kappa indexes higher than 0.9, shows high agreement among experts. Conclusion: MICRORUBRI is a valid and reliable instrument to evaluate the development of competences.

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Teaching the wave concept through problem-based learning

Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids

Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau

TIC en la enseñanza de las ecuaciones diferenciales de primer orden

Understanding of derivative as an essential part of the study of differential calculus

Validez de instrumento CALA para evaluar asesorías académicas virtuales

Validez de instrumento para medir el aprendizaje creativo

Validity of microrubri, instrument to measure the development of competences in mathematics

Envíos recientes

Teaching the wave concept through problem-based learning

Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids

Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau

TIC en la enseñanza de las ecuaciones diferenciales de primer orden

Understanding of derivative as an essential part of the study of differential calculus

Validez de instrumento CALA para evaluar asesorías académicas virtuales

Validez de instrumento para medir el aprendizaje creativo

Validity of microrubri, instrument to measure the development of competences in mathematics

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Listar EULER por título

Teaching the wave concept through problem-based learning ﻿

Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids ﻿

Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau ﻿

TIC en la enseñanza de las ecuaciones diferenciales de primer orden ﻿

Understanding of derivative as an essential part of the study of differential calculus ﻿

Validez de instrumento CALA para evaluar asesorías académicas virtuales ﻿

Validez de instrumento para medir el aprendizaje creativo ﻿

Validity of microrubri, instrument to measure the development of competences in mathematics ﻿

Envíos recientes

Teaching the wave concept through problem-based learning

Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids

Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau

TIC en la enseñanza de las ecuaciones diferenciales de primer orden

Understanding of derivative as an essential part of the study of differential calculus

Validez de instrumento CALA para evaluar asesorías académicas virtuales

Validez de instrumento para medir el aprendizaje creativo

Validity of microrubri, instrument to measure the development of competences in mathematics

Portales Institucionales

Teaching the wave concept through problem-based learning

Thermoeconomic modelling and parametric study of a simple ORC for the recovery of waste heat in a 2 MW gas engine under different working fluids

Thixotroic behaviour study of clayey soils from the lacustrine deposits of bogotá high plateau

TIC en la enseñanza de las ecuaciones diferenciales de primer orden

Understanding of derivative as an essential part of the study of differential calculus

Validez de instrumento CALA para evaluar asesorías académicas virtuales

Validez de instrumento para medir el aprendizaje creativo

Validity of microrubri, instrument to measure the development of competences in mathematics