Mostrando ítems 21-40 de 81

The development of reflective thought for the training in integral people

Martínez Lozano, José Joaquín; Paz Montes, Luisa Stella; Vergel Ortega, Mawency (Logos Ciencia & Tecnología, 2018-07-01)

In this article we present results of research whose objective was to analyze experiences in the growth of plants such as the Duranta and Salvia where the student develops competences in posing and solving problems that ...
Five Steps for Process Development under the Energy Sustainability Criteria

Valencia, Guillermo E.; Salcedo, Milton F.; Rojas Suárez, Jhan Piero (Chemical Engineering TransactionsRoma , Italia, 2018-09-01)

Considering that sustainability criteria play a fundamental role in the control and efficient operation of production processes, this article presents five fundamental steps based on the benefits of an Integrated Energy ...
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 ...
Energy optimization of industrial steam boiler using energy performance indicator

Valencia, Guillermo; Rojas Suárez, Jhan Piero; Campos Avella, Juan (Ankara , Turquia, 2019)

This article shows the application of an energy management system and the calculation of energy efficiency indicators to a pyrotubular boiler, following the guidelines of the ISO50001 standard. The actual energy consumption ...
Cenizas Volantes de Termoeléctrica como Materia Prima para la Fabricación de Materiales Cerámicos de Construcción: Efecto de la Temperatura de Cocción sobre el Material

Sanchez Molina, Jorge; Rojas Suárez, Jhan Piero; CORPAS IGLESIAS, FRANCISCO ANTONIO (Informacion TecnologicaSantiago de Chile , Chile, 2019-02)

Se empleó ceniza volante de una central termoeléctrica, como sustituto parcial de material arcilloso, para la elaboración de cerámicos de construcción. Las probetas se realizaron con sustituciones del 5, 10, 15 y 20% (peso), ...
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 ...
Behavior of the consumer of products in the offer of indigenous INGA tribes

Rojas Suárez, Jhan Piero; Paz Montes, Luisa Stella; Vergel Ortega, Mawency (Revista Clío AméricaBogota ,Colombia, 2019-05-24)

La investigación sigue un enfoque mixto. Su objetivo es diseñar un modelo estructural que identifique variables explicativas del proceso de compra de artesanías y extractos de plantas medicinales a la comunidad inga. Desde ...
Comparative study of costs for reinforced concrete portico buildings designed with different degrees of seismic performance

Rojas Suárez, Jhan Piero; Caceres Rubio, Jose Rafael; Marquez Penaranda, Jorge Fernando (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-06-27)

The Colombian regulation of earthquake resistant construction NSR-10 establishes that the seismic-resistant capacity of a building must be classified according to three degrees of energy dissipation: Special energy ...
Subgrade improvement by the replacement of conventional stone aggregate by biosanitary waste treated

Rojas Suárez, Jhan Piero; Hurtado-Figueroa, Oswaldo; Cárdenas-Gutiérrez, Javier Alfonso (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-09-30)

An experimental investigation was made in search of the improvement of the material used for the conformation of the subgrade in pavements. Three separate excavations were carried out 150 m apart in a 510 m stretch located ...
Emotional intelligence in the initial teacher training

SANTIAGO CARRILLO, MARTHA CECILIA; Rincón Leal, Olga Lucy; Cáceres Carvajal, M O (Journal of Physics: Conference SeriesMadrid , España, 2019-09-30)

The objective of the article is to evaluate emotional intelligence in the initial teacher training of the mathematics bachelor program at the "Universidad Francisco de Paula Santander", San José de Cúcuta, Colombia. The ...
Perception of stiffness trend in city residential buildings

Rojas Suárez, Jhan Piero; Prada Botia, Gaudy Carolina; Orjuela Abril, Martha Sofia (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-09-30)

In this project, a descriptive research was carried out in order to analyze, evaluate and detail the behavior of buildings between 4 and 18 floors of residential use in the City of San José de Cúcuta, Colombia, at the ...
Estimation of models and cycles in time series applying fractal geometry

Rojas Suárez, Jhan Piero; GALLARDO PÉREZ, HENRY DE JESÚS; Gallardo Pérez, Oscar Alberto (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-09-30)

A time series, also called a time series or chronological series, consists of a set of data, coming from realizations of a random variable that are observed successively in time. Its analysis involves the use of statistical ...
Student leaders profile according to the United Nations model a factorial analysis

Rincón Leal, Olga Lucy; Vergel Ortega, Mawency; Rincón Leal, Jaime Fernando (Journal of Physics: Conference SeriesMadrid , España, 2019-09-30)

The objective of this research was to create a structural model able to explain the profile of student leaders during their youth stage, by implementing the pedagogical model form national university organization, in order ...
Development of geometric thought

GALLARDO PÉREZ, HENRY DE JESÚS; Vergel Ortega, Mawency; Alvarado Gallardo, A (Journal of Physics: Conference SeriesMadrid , España, 2019-09-30)

Geometric thinking is a process in which competences are developed to understand three-dimensional space. The experience arises from the need to implement teaching methodologies that allow to optimize both the potential ...
The influence of CO3Cu on the growth of the Duranta

Gómez Vergel, Carlos Sebastian; Vergel Ortega, Mawency; Rincón Leal, Olga Lucy (Journal of Physics: Conference SeriesMadrid , España, 2019-09-30)

In this article, we present some research results whose objective was to analyze the growth of Duranta plants, under the influence of sprinkling foliage and CO3Cu concentrations. The methodology followed a quantitative ...
Curricular trends in the Universidad Francisco de Paula Santander academic program offerings

Parra López, Héctor Miguel; Rojas Suárez, Jhan Piero; Vergel Ortega, Mawency (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-09-30)

The objective of the research work, was to analyze the curriculum of the programs from "Universidad Francisco de Paula Santander" in San José de Cucuta, Colombia. The sample was participatory non-probability, with the ...
Study and design of a parking meter system

Rojas Suárez, Jhan Piero; Orjuela Abril, Martha Sofia; Prada Botia, Gaudy Carolina (Journal of Physics: Conference SeriesLondres, Inglaterra, 2019-09-30)

The automobile is the main means of transportation in most cities of the world, however, its excessive use has generated several environmental and social problems, one of them is the lack of control over parking on public ...
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 ...
Influencia de la molienda húmeda en el comportamiento estructural y mecánico de productos cerámicos conformados por extrusión de una arcilla del Zulia (Norte dew Santander-Colombia)

Moreno Quintero, Marlyn Paulina; Pabón Acevedo, Yury Alexandra; CELY ILLERA, LEONARDO; Cely Niño, Jairo (Boletin De La Sociedad Espanola De Ceramica Y VidrioMadrid , España, 2019-10)

Se presentan los resultados de un estudio realizado en el conformado de una arcilla del Zulia (Norte de Santander, Colombia) y la influencia de la molienda húmeda en el comportamiento estructural y mecánico. El estudio se ...
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 ...

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The development of reflective thought for the training in integral people
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Martínez Lozano, José Joaquín | 2018-07-01

In this article we present results of research whose objective was to analyze experiences in the growth of plants such as the Duranta and Salvia where the student develops competences in posing and solving problems that allowed him to argue, model, communicate on mathematics in improvement of their academic performance. The methodology followed a quantitative approach, field-type experimental design, applied to a sample of 180 students of engineering programs. Results: 95% of the students remained in the course, 99% scored above the general institutional average in integral calculus. Conclusion: Application in plant growth allowed to develop competences in raising and solving problems, development of mathematical thinking, analyzing variables and changes in a time, modeling situations; argue, represent entities. The use of blogs allowed the generation of new methods of study, and different forms of evaluation and evaluation of learning, both for students and teachers.

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Five Steps for Process Development under the Energy Sustainability Criteria
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Valencia, Guillermo E. | 2018-09-01

Considering that sustainability criteria play a fundamental role in the control and efficient operation of production processes, this article presents five fundamental steps based on the benefits of an Integrated Energy Management System. The five steps formulated for the development of processes under a sustainable development approach are based on measures for the rational use of energy that seek both environmental and economic benefits, if these savings measures are applied in the respective production process. The results obtained from the application of the five steps to a company of the product sector in Colombia, resulted in an additional benefit such as increased energy control of the production process. The article shows in detail how to establish the Baseline, evaluate the consumption trend, quantify emission reductions, economically quantify savings, and evaluate the energy control of the production process with a view to the sustainable operation of industrial processes. The main contribution of this article is the development of a systematic tool based on performance indicators and historical operational information of the process to achieve a sustainable and environmentally friendly operation of any company that implements it.

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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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Energy optimization of industrial steam boiler using energy performance indicator
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Valencia, Guillermo | 2019

This article shows the application of an energy management system and the calculation of energy efficiency indicators to a pyrotubular boiler, following the guidelines of the ISO50001 standard. The actual energy consumption indicators, the theoretical consumption index, the energy baseline and the efficiency index 100 were evaluated based on gas consumption and steam production data. As for the savings measure, a 20% reduction in gas consumption can be achieved by reducing the operational variability equivalent to 186,633 m3/month, thereby achieving a monthly savings of $70,920,717 COP and a large reduction in natural gas equivalent to a reduction in CO2 emissions (1,318,739.05 kg CO2/month). Also, the purges currently recorded in the boiler are higher than the recommended value for this equipment, and the excess air released varies between 6% and 11%, increasing the losses due to sensible heat. Three main implementations were applied to improve the energy performance of the steam boiler. The first saving implementation was the reduction of the generation pressure from 250 to 180 psig, achieving a lower gas temperature with a reduction of heat losses from the boiler, pipes and steam leakage losses, achieving a saving of 2% of the average natural gas consumption. The second implementation was the automation of the boiler purges, in accordance with the recommended value UNE-9075/85, achieving a total saving of 0.66%, and the third measurement allows on-line correction of the combustion air by direct measurement of O2, which maintains the measured oxygen value at 3%, which is the recommended value. With this practical and novel method energy performance indicator on the boiler, was increased the performance of the equipment, as well as the production costs and environmental impact reduction.

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Cenizas Volantes de Termoeléctrica como Materia Prima para la Fabricación de Materiales Cerámicos de Construcción: Efecto de la Temperatura de Cocción sobre el Material
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Sanchez Molina, Jorge | 2019-02

Se empleó ceniza volante de una central termoeléctrica, como sustituto parcial de material arcilloso, para la elaboración de cerámicos de construcción. Las probetas se realizaron con sustituciones del 5, 10, 15 y 20% (peso), mediante conformado por extrusión, se emplearon varias temperaturas de cocción (900 a 1200ºC). Esto para establecer correlaciones entre la microestructura, la topografía y las propiedades tecnológicas del cerámico tales como la resistencia mecánica a la flexión, la resistencia a la abrasión profunda, el porcentaje de absorción de agua, la conductividad térmica y la contracción lineal de secado/cocción. El análisis microestructural y de topografía dejó en evidencia que la ceniza volante es rica en fase amorfa y con presencia de elementos de carácter fundente (K y Fe). Los fenómenos de recristalización de sílice presente y el aumento de porosidad parecen explicar el comportamiento obtenido. Sustituciones hasta del 10% de CV permite obtener cerámicos con aplicabilidad en el sector de la construcción.

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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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Behavior of the consumer of products in the offer of indigenous INGA tribes
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Rojas Suárez, Jhan Piero | 2019-05-24

La investigación sigue un enfoque mixto. Su objetivo es diseñar un modelo estructural que identifique variables explicativas del proceso de compra de artesanías y extractos de plantas medicinales a la comunidad inga. Desde el método etnográfico en investigación cualitativa, y utilizando elementos del diseño factorial y correlacional, basado en el modelo de ecuaciones estructurales (SEM) del enfoque cuantitativo, se implementan instrumentos de entrevista, observación y encuesta a una muestra constituida por 500 transeúntes consumidores de productos naturales y 280 integrantes de la comunidad inga del municipio de Cúcuta, Colombia. Los resultados permiten identificar categorías emergentes como planeación territorial participativa, contexto, igualdad de derechos, producción sustentable, organización, investigación e innovación, mercadeo y capacitaciones como inversión natural; así mismo, dentro de una inversión ambiental, factores de capacidad de talento humano, uso de prácticas ancestrales, factores sociales, producto, afecto y tecnología inciden en el comportamiento del consumidor como irrupción del orden social. Se concluye que a partir del modelo logit se identifica la representación cultural influida por el comportamiento del consumidor de productos en la oferta de las tribus.

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Comparative study of costs for reinforced concrete portico buildings designed with different degrees of seismic performance
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Rojas Suárez, Jhan Piero | 2019-06-27

The Colombian regulation of earthquake resistant construction NSR-10 establishes that the seismic-resistant capacity of a building must be classified according to three degrees of energy dissipation: Special energy dissipation, moderate energy dissipation and minimum energy dissipation. The dimensioning and detailing requirements for structural elements that are demanded according to each grade depend on the need to withstand earthquakes in the inelastic range according to the seismic hazard zone in which the structure is located. This work presents an analysis of the incidence of the requirements of each degree of energy dissipation on the costs of multi-storey building structures. For this, the structural analysis and design of four building configurations (2, 3, 4 and 5 floors) for each minimum energy dissipation, moderate energy dissipation, and special energy dissipation grade has been carried out and the quantities of work with their respective total cost have been determined. As a general conclusion, it can be stated that the cost of building a structure that has special energy dissipation capacity for a given building can be twice that of a structure that has minimum energy dissipation capacity for the same building. On the other hand, it was observed that in order to guarantee a rigidity comparable to that of the other models analyzed, the system of reinforced concrete portal resistant to moments for DES level requires large column dimensions in the case of buildings of four or more floors, which suggests that other types of more efficient elements should be used in the vertical seismic resistance system.

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Subgrade improvement by the replacement of conventional stone aggregate by biosanitary waste treated
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Rojas Suárez, Jhan Piero | 2019-09-30

An experimental investigation was made in search of the improvement of the material used for the conformation of the subgrade in pavements. Three separate excavations were carried out 150 m apart in a 510 m stretch located in the Guayabal environmental technology park in the city of San José de Cúcuta, Colombia. In each excavation 2 samples were taken at depths of 0.50 m and 1 m. The soil samples extracted were analyzed in accordance with the regulations of the "Instituto Nacional de Vías" of Colombia in its update of 2013. It was collected material, not superior to 20 mm, of biosanitary residues treated by the Ecosterile machine series 250C located in the environmental technological park Guayabal. Five experimental mixtures were carried out partially substituting 2%, 6%, 8%, 10% and 14% of the weight of the excavated soil with treated biosanitary residues, random percentages taken as initial reference in the experimentation due to the characteristics of the substitute material. The California bearing ratio test was performed on experimental mixtures whose data were tabulated and compared with those obtained in similar tests carried out on the material conventionally used for the improvement of the subgrade in pavements according to Colombian regulations. The tests provided interesting information that concluded in the substitution of 2% of the conventional material to improve the performance of the subgrade in the intervened section, a value that obtained better results in the California bearing ratio test, yielding 79.2% with respect to the result obtained by the conventional material. The exposed results are convenient for the economy of road projects due to the partial substitution of traditional material by residual material, at the same time the use of a hospital waste is implemented as construction material, bringing with it positive environmental and social benefits as far as its final disposition.

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Emotional intelligence in the initial teacher training
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SANTIAGO CARRILLO, MARTHA CECILIA | 2019-09-30

The objective of the article is to evaluate emotional intelligence in the initial teacher training of the mathematics bachelor program at the "Universidad Francisco de Paula Santander", San José de Cúcuta, Colombia. The methodology is framed in the qualitative approach with some complementary aspects of the quantitative approach, the applied technique is the interview and the trait meta-mood scale instrument. The results describe that the impacts of integrating the emotive dimension in the learning strategies of mathematics is a greater resilience in the teachers in formation, since thanks to the contact with their emotions through introspection and reflection they manage to draw plans and alternatives that help them to devote more time, ask more and study better, especially in those aspects that cause them difficulty.

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Perception of stiffness trend in city residential buildings
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Rojas Suárez, Jhan Piero | 2019-09-30

In this project, a descriptive research was carried out in order to analyze, evaluate and detail the behavior of buildings between 4 and 18 floors of residential use in the City of San José de Cúcuta, Colombia, at the moment they are subjected to forces produced by earthquakes. For this purpose, a sample of 40 buildings framed in the above-mentioned characteristics was used by means of the SAP 2000 software. The seismic analysis of each building was made and the displacements of these were obtained when they are submitted before an earthquake. With this information, it was possible to calculate the drifts and evaluate them based on the requirements that determine the stiffness conditions present in the buildings. Finally, a document was drawn up identifying those buildings that are susceptible to significant damage in the event of a seismic movement and recommendations, due to the fact that they represent a social risk.

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$Portada Estimation of models and cycles in time series applying fractal geometry$

Estimation of models and cycles in time series applying fractal geometry
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Rojas Suárez, Jhan Piero | 2019-09-30

A time series, also called a time series or chronological series, consists of a set of data, coming from realizations of a random variable that are observed successively in time. Its analysis involves the use of statistical methods to adjust models to explain their behavior and make reliable forecasts. In this article integrated autoregressive models of moving average are adjusted to the studied series, complemented with specific methods of fractal geometry as support for the detection of the existence of random cycles in the series. The present investigation implies the realization of simulations, in a first phase and, later, the analysis of temporal series of economic and social variables of the country and the region.

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Student leaders profile according to the United Nations model a factorial analysis
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Rincón Leal, Olga Lucy | 2019-09-30

The objective of this research was to create a structural model able to explain the profile of student leaders during their youth stage, by implementing the pedagogical model form national university organization, in order to develop skills from a cognitive approach using an event-based learning trend. The research had a quantitative methodological approach, addressing differences in the students' cognitive abilities for oral expression and textual production, along with a correlational method of factorial design analysis, as a field type. The beneficiary population was made up of students from private educational institutions with an average age of 17 years. According to the model, it was found that among the factors associated with leadership are, the ability to lobby, strategies, critical reading, intensity of the debate, discourse analysis, quality of presentation, decision making, characteristics that determine the profile of a ruler.

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Development of geometric thought
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GALLARDO PÉREZ, HENRY DE JESÚS | 2019-09-30

Geometric thinking is a process in which competences are developed to understand three-dimensional space. The experience arises from the need to implement teaching methodologies that allow to optimize both the potential of teachable that has the geometry as the potential of learnability of the student with the purpose of deepening in the learnings so that, by means of the construction of models and the mathematical principle of reconstruction and invention of mathematics, emphasizing spatial thinking and leading the student to recognize geometric objects, geometric spaces and associated transformations to develop mathematical skills while strengthening their geometric thinking.

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The influence of CO3Cu on the growth of the Duranta
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Gómez Vergel, Carlos Sebastian | 2019-09-30

In this article, we present some research results whose objective was to analyze the growth of Duranta plants, under the influence of sprinkling foliage and CO3Cu concentrations. The methodology followed a quantitative approach, field-type experimental design, data are taken during 30 days of cultivation, length of root, dry weight, and stem diameter and height are measured. The results show an increase of dry weight, harmonic growth of the root related to the height of the plant. It is concluded that a solution of 140 g of CO3Cu liter of latex-1 generates increase in dry weight of Duranta.

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Curricular trends in the Universidad Francisco de Paula Santander academic program offerings
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Parra López, Héctor Miguel | 2019-09-30

The objective of the research work, was to analyze the curriculum of the programs from "Universidad Francisco de Paula Santander" in San José de Cucuta, Colombia. The sample was participatory non-probability, with the participation of 200 students from Catatumbo and university student's, both from the different semesters and documents curriculums. A mixed study of sequential explanatory design was applied. In the first quantitative phase, the results were obtained by applying a digital questionnaire to the students. The data were analyzed using the observation guide for their respective analysis. The results of both phases were merged by the contrasting method. The conclusions demonstrate the importance of curriculum for training in research and innovation and critical thinking, curriculum for the creation, adaptation and/or use of communication and information technologies, curriculum for social inclusion in the university.

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Study and design of a parking meter system
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Rojas Suárez, Jhan Piero | 2019-09-30

The automobile is the main means of transportation in most cities of the world, however, its excessive use has generated several environmental and social problems, one of them is the lack of control over parking on public roads, affecting vehicle traffic, disturbing the image of the city, increasing the rate of accidents and causing negative effects on the mood of drivers and pedestrians. There are different alternatives to reduce these indicators, highlighting the effectiveness of the implementation of parking meter systems, which seek to regulate parking on public roads through a fee and a time limit. This article demonstrates the design, feasibility and impact (economic, social and environmental) of an implementation of the parking meter system in the center of the city of San José de Cúcuta, Colombia, with data from the Secretariat of Transit of the metropolitan area of the city of San José de Cúcuta, Colombia and the national institute of roads, achieving a solution to the problem of traffic congestion in the city and also contributing to create citizen culture among its inhabitants.

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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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Influencia de la molienda húmeda en el comportamiento estructural y mecánico de productos cerámicos conformados por extrusión de una arcilla del Zulia (Norte dew Santander-Colombia)
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Moreno Quintero, Marlyn Paulina | 2019-10

Se presentan los resultados de un estudio realizado en el conformado de una arcilla del Zulia (Norte de Santander, Colombia) y la influencia de la molienda húmeda en el comportamiento estructural y mecánico. El estudio se llevó a cabo conformando el material por extrusión por ser esta la técnica más utilizada en la industria cerámica de la región y posterior tratamiento de sinterización entre 900 °C hasta 1200 °C. Para el desarrollo de los análisis se conformaron probetas con dos pastas preparadas por molienda en seco y en húmedo. Se evaluó el comportamiento estructural, resistencia mecánica y aspectos tecnológicos como contracción y densificación, entre otros. Los resultados obtenidos indican mejoras en propiedades estructurales y mecánicas con descensos hasta del 18,8% en la porosidad e incrementos hasta de un 72,1% en resistencia a cargas externas, incrementando el valor comercial para productos de revestimiento y mampostería. Se evidenció que la molienda en húmedo puede ser usada para mejorar el proceso de extrusión, las características tecnológicas de los materiales y el valor comercial de lo mismos, aspecto importante en las empresas regionales.

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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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Listar EULER por fecha de publicación

The development of reflective thought for the training in integral people ﻿

Five Steps for Process Development under the Energy Sustainability Criteria ﻿

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

Energy optimization of industrial steam boiler using energy performance indicator ﻿

Cenizas Volantes de Termoeléctrica como Materia Prima para la Fabricación de Materiales Cerámicos de Construcción: Efecto de la Temperatura de Cocción sobre el Material ﻿

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

Behavior of the consumer of products in the offer of indigenous INGA tribes ﻿

Comparative study of costs for reinforced concrete portico buildings designed with different degrees of seismic performance ﻿

Subgrade improvement by the replacement of conventional stone aggregate by biosanitary waste treated ﻿

Emotional intelligence in the initial teacher training ﻿

Perception of stiffness trend in city residential buildings ﻿

Estimation of models and cycles in time series applying fractal geometry ﻿

Student leaders profile according to the United Nations model a factorial analysis ﻿

Development of geometric thought ﻿

The influence of CO3Cu on the growth of the Duranta ﻿

Curricular trends in the Universidad Francisco de Paula Santander academic program offerings ﻿

Study and design of a parking meter system ﻿

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

Influencia de la molienda húmeda en el comportamiento estructural y mecánico de productos cerámicos conformados por extrusión de una arcilla del Zulia (Norte dew Santander-Colombia) ﻿

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 ﻿

Envíos recientes

The development of reflective thought for the training in integral people

Five Steps for Process Development under the Energy Sustainability Criteria

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

Energy optimization of industrial steam boiler using energy performance indicator

Cenizas Volantes de Termoeléctrica como Materia Prima para la Fabricación de Materiales Cerámicos de Construcción: Efecto de la Temperatura de Cocción sobre el Material

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

Behavior of the consumer of products in the offer of indigenous INGA tribes

Comparative study of costs for reinforced concrete portico buildings designed with different degrees of seismic performance

Subgrade improvement by the replacement of conventional stone aggregate by biosanitary waste treated

Emotional intelligence in the initial teacher training

Perception of stiffness trend in city residential buildings

Estimation of models and cycles in time series applying fractal geometry

Student leaders profile according to the United Nations model a factorial analysis

Development of geometric thought

The influence of CO3Cu on the growth of the Duranta

Curricular trends in the Universidad Francisco de Paula Santander academic program offerings

Study and design of a parking meter system

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

Influencia de la molienda húmeda en el comportamiento estructural y mecánico de productos cerámicos conformados por extrusión de una arcilla del Zulia (Norte dew Santander-Colombia)

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

Portales Institucionales

The development of reflective thought for the training in integral people

Five Steps for Process Development under the Energy Sustainability Criteria

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

Energy optimization of industrial steam boiler using energy performance indicator

Cenizas Volantes de Termoeléctrica como Materia Prima para la Fabricación de Materiales Cerámicos de Construcción: Efecto de la Temperatura de Cocción sobre el Material

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

Behavior of the consumer of products in the offer of indigenous INGA tribes

Comparative study of costs for reinforced concrete portico buildings designed with different degrees of seismic performance

Subgrade improvement by the replacement of conventional stone aggregate by biosanitary waste treated

Emotional intelligence in the initial teacher training

Perception of stiffness trend in city residential buildings

Estimation of models and cycles in time series applying fractal geometry

Student leaders profile according to the United Nations model a factorial analysis

Development of geometric thought

The influence of CO3Cu on the growth of the Duranta

Curricular trends in the Universidad Francisco de Paula Santander academic program offerings

Study and design of a parking meter system

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

Influencia de la molienda húmeda en el comportamiento estructural y mecánico de productos cerámicos conformados por extrusión de una arcilla del Zulia (Norte dew Santander-Colombia)

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