12456 research outputs found
Sort by
Diseño de un modelo didáctico basado en competencias socioemocionales para el éxito académico de estudiantes de educación media
No full textEl presente trabajo se propuso diseñar un modelo didáctico basado en competencias socioemocionales para el éxito académico de estudiantes de educación media de las Instituciones Educativas Distritales La Libertad y David Sánchez Juliao, bajo al enfoque mixto, Racionalista-Deductivo, bajo la tipología de campo, analítica y propositiva. La población quedó conformada por estudiantes y docentes de las I.E.D. David Sánchez Juliao y La Libertad de Barranquilla, siendo la muestra no probabilística – intencional de 10 docentes y 30 estudiantes de educación media; las técnicas de recolección de datos fueron la encuesta, revisión documental y grupo focal, y los instrumentos un cuestionario, guión de preguntas y matriz de análisis. Para la validez se recurrió al juicio de tres expertos y se hizo el cálculo de confiabilidad del cuestionario con Alfa de Cronbach obteniendo un coeficiente 0,70. Entre los resultados se destaca que el los PEI de la I.E.D. La Libertad y la I.E.D. David Sánchez Juliao se precisan modelos pedagógicos humanistas y constructivista, en tanto quedó demostrado que los estudiantes no dominan las competencias socioemocionales y los docentes aseveran que la autoconciencia emocional también juega un papel clave en su capacidad para manejar el estrés, la ansiedad y las presiones académicas, lo que a su vez puede influir en su éxito educativo. Se proponga un Plan de Enseñanza Socioafectiva “Generando emociones para la Vida” bajo un modelo didáctico integrador.The present work proposed to design a didactic model based on socio-emotional competences for the academic success of secondary education students of the La Libertad and David Sánchez Juliao District Educational Institutions, under the mixed, Rationalist-Deductive approach, under the analytical field typology. and purposeful. The population was made up of students and teachers from the I.E.D. David Sánchez Juliao and La Libertad de Barranquilla, being the non-probabilistic - intentional sample of 10 teachers and 30 secondary education students; The data collection techniques were the survey, document review and focus group, and the instruments were a questionnaire, a script of questions and an analysis matrix. For validity, the judgment of three experts was used and the reliability calculation of the questionnaire was made with Cronbach's Alpha, obtaining a coefficient of 0.70. Among the results it stands out that the PEI of the I.E.D. Liberty and the I.E.D. David Sánchez Juliao humanist and constructivist pedagogical models are needed, as it was shown that students do not master socio-emotional competencies and teachers assert that emotional self-awareness also plays a key role in their ability to manage stress, anxiety and academic pressures , which in turn can influence their educational success. A Socioaffective Teaching Plan "Generating emotions for Life" is proposed under an integrative didactic model.Lista de Tablas y Figuras 11 -- Introducción 15 -- Capítulo 18 -- Planteamiento del Problema 18 -- Descripción del problema 18 -- Formulación del problema 28 -- Interrogantes de investigación 28 -- Objetivos 29 -- Objetivo General 29 -- Objetivos específicos 30 -- Justificación 31 -- Delimitación del Problema 34 -- Delimitación Espacial y Geográfica 34 -- Delimitación Temporal 35 -- Delimitación Teórica y de Contenido 35 -- Capítulo 35 -- Marco Referencial 35 -- Marco Referencial 36 -- Estado del Arte 37 -- Antecedentes internacionales 37 -- Antecedentes Nacionales 42 -- Antecedentes Regionales 45 -- Marco Teórico o Teorías de Entrada 49 --
La Didáctica 49 -- Perspectivas de la Didáctica: Tecnológica, artística y profesionalizadora-indagadora 51 -- Teorías de la enseñanza 54 -- Modelos didácticos 58 -- Competencias Socioemocionales 65 -- Concepciones de Competencias 65 -- Concepciones de Competencias Socio-emocionales 67 --
Clasificación de las competencias Socio-emocionales 68 -- Éxito Académico 75 --
Factores del éxito académico 76 -- Marco Conceptua 80 -- Didáctica 80 -- Modelo didáctico 81 -- Competencias socioemocionales 81 -- Éxito escolar 81 -- Modelo didáctico 82 -- Competencias socioemocionales 82 -- Marco Legal 83 -- Operacionalización de las variables 91 -- Capítulo 96 -- Diseño Metodológico 96 --
Enfoque epistemológico 96 -- Paradigma 96 -- Tipo de investigación 97 -- Diseño de investigación 98 -- Población y Muestra 99 -- Técnicas de recolección de datos 100 -- La encuesta 100 -- Grupo focal 100 -- Instrumentos de recolección de datos 101 --
Validez y Confiabilidad de los Instrumentos 103 -- Técnicas de análisis de datos 104 -- Capítulo IV 105 -- Análisis e interpretación de Resultados 105 -- Análisis de Resultados Documental 105 -- Análisis de resultados de la Encuesta a Estudiantes 122 -- Análisis de resultados Grupo Focal Docentes 147 -- Capítulo V 155 --
Conclusiones, Recomendaciones y Propuesta 155 -- Conclusiones 155 -- Propuesta 157 -- Fundamentación Filosófica de la Propuesta 159 -- Misión de la Propuesta 160 -- Visión de la Propuesta 161 -- Principios Orientadores de la Propuesta 162 --
Valores de la Propuesta 163 -- Objetivo de la Propuesta 164 -- Justificación de la Propuesta 164 -- Perfiles de los actores 165 -- Referentes Teóricos del Modelo Didáctico 167-- Referente Metodológico 169 -- Ejes para el diseño del Plan 177 --
Ruta hacia la Generación de emociones para la Vida 177-- Fase Evaluar “Reflexiones de la Propuesta” 178 -- Recomendaciones 180 -- Referencias 182 --Magíster en EducaciónMaestrí
Influence of recycled concrete aggregates on the california bearing ratio (CBR) of granular sub-bases
No full textRecycled concrete aggregates (RCAs) have a high potential to be used as replacements for natural aggregates in the construction of pavements with similar or even better characteristics. This paper evaluates the influence of RCA as a partial replacement in a granular sub-base of 37.5 mm nominal maximum size (GSB38). Specifically, two replacement percentages of RCA by weight of the coarse aggregate of the GSB38 were evaluated: 10 and 15. To estimate the influence on the mechanical behavior, abrasion tests were carried out in the Los Angeles (LA) abrasion and California bearing ratio (CBR) methods. For GSB38, the average abrasion results were 30.54%. The CBR for the same material at a penetration of 0.254 cm was 26.90, 61.00 and 76.20% and at a penetration of 0.508 cm was 33.00, 65.70 and 82.00% for 10, 25 and 56 blows per layer, respectively. For GSB38 with 10% RCA, similar and even better behavior than natural GSB38 was found in terms of LA abrasion, with an average result of 38.68%. The CBR for the same alternative at a penetration of 0.254 cm was 13.20, 52.80 and 57.70% and at a penetration of 0.508 cm was 18.00, 61.30 and 68.90% for 10, 25 and 56 blows per layer, respectively. But GSB38 with 15% RCA showed an average abrasion of 45.51%, indicating a decrease compared with natural GSB38 and GSB38 with 10% RCA. The CBR for the same alternative also shows a decreasing trend
Coast change: understanding sensitivity to beach loss for coastal tourism in the colombian caribbean.
No full textBeach and sun tourism in the Colombian Caribbean is an extremely important activity that leads to social practices that generate recreational and economic activities directly impacting the environment. The research focuses on assessing the sensitivity to the loss of beaches as tourist resources in four locations within the Colombian Caribbean (Santa Verónica, Salinas del Rey, Bocatocino, and Las Arenas). The sensitivity indicator was developed using GIS to process variables such as the width of the usable beach, the presence of dunes, and rates of coastal erosion spanning from 2003 to 2019. Additionally, anthropic occupation was examined through satellite images. The results allowed for identifying vulnerability indices and recognizing the critical role of dunes in beach preservation. The study revealed that the analyzed beaches exhibited varying degrees of sensitivity. Notably, historical erosion rates and dunes were the most influential variables affecting sensitivity. In conclusion, understanding the sensitivity state concerning the loss of beach areas as tourist resources helps delineate stable sectors and those more susceptible to erosion processes. This knowledge proves invaluable in prioritizing the design and implementation of protective measures in areas requiring urgent attentio
Automation of the air conditioning system for aseptic rooms of pharmaceutical production
No full textAs modern control systems are becoming more complex, and the implemented technology more sophisticated, the importance of the different characteristics of those systems, such as reliability, availability, security, and protection, is increasing. In this article, an automation design for the air conditioning system of classified areas of the Parenteral solutions plant of the eastern pharmaceutical laboratory company of Santiago de Cuba province, Cuba, is proposed because there is a lack of optimal environmental conditions for development and production of pharmaceuticals at a large scale. The proposal is focused on the design of a supervision system and automatic control of the environmental variables that influence the drug production process. The entire algorithm for the design was developed to monitor critical and non-critical variables and control values of temperature, relative humidity, differential pressure, and air velocity according to standards established by pharmaceutical companies. The design of the automation system includes, apart from the control and supervision algorithm for operation efficiency, the necessary instrumentation
Analysis of the impact of integrating variable renewable energy into the power system in the colombian caribbean region
No full textThis paper compares the effects of adding solar and wind power to the power system of Colombia’s Caribbean region and its connections to the National Interconnected System. A base scenario was simulated in the PowerFactory 2003 software considering the actual data of the power system in 2023, and then, they were compared with the results obtained for 2033, considering the growth of the network and the addition of new power plants based on variable renewable energy. The comparison analyzes the impact of the newly added renewable energy in the power system on the voltage stability and system frequency. The results obtained show that the addition of new variable renewable energy plants generates voltage fluctuations in the lower voltage levels, ranging from 1% to 3.1%, which indicates potential challenges in maintaining the voltage stability. In higher voltages, no significant variations were found. Regarding the system frequency, the transient value tends to increase but is within the regulatory range, with variations of less than 0.2 Hz
Experimental–density functional theory (DFT) study of the inhibitory effect of furan residues in the ziegler–natta catalyst during polypropylene synthesis
No full textIn this experimental–theoretical study, the effect of furan on Ziegler–Natta catalyst productivity, melt flow index (MFI), and mechanical properties of polypropylene were investigated. Through the analysis of the global and local reactivity of the reagents, it was determined that the furan acts as an electron donor. In contrast, the titanium of the ZN catalyst acts as an electron acceptor. It is postulated that this difference in reactivity could lead to forming a furan–titanium complex, which blocks the catalyst’s active sites and reduces its efficiency for propylene polymerization. Theoretical results showed a high adsorption affinity of furan to the active site of the Ti catalyst, indicating that furan tends to bind strongly to the catalyst, thus blocking the active sites and decreasing the availability for propylene polymerization. The experimental data revealed that the presence of furan significantly reduced the productivity of the ZN catalyst by 10, 20, and 41% for concentrations of 6, 12.23, and 25.03 ppm furan, respectively. In addition, a proportional relationship was observed between the furan concentration and the MFI melt index of the polymer, where the higher the furan concentration, the higher the MFI. Likewise, the presence of furan negatively affected the mechanical properties of polypropylene, especially the impact Izod value, with percentage decreases of 9, 18, and 22% for concentrations of 6, 12.23, and 25.03 ppm furan, respectively
Classification of japanese handwritten characters using biometrics approach
No full textThe following paper presents a solution to the problem of offline recognition of Japanese characters. Minutiae and other features extractable from handwriting images have been used to recognize individual characters. The solution presented by the authors uses minutiae to recognise single Japanese characters. Due to the complexity of this typeface, the solution presented can be used to recognise archaic characters, from old documents or also works of art. Neural Networks and hybrid classifiers based on five basic types of classifiers, i.e., k-nearest neighbour method, decision trees, support vector machine, logistic regression and Gaussian Naive Bayes classifier have been developed for classification. The study was conducted on Hiragana, Katakana and Kanji characters (ETL9G Database). The accuracy value obtained was 99.934%. The authors present what is probably the first algorithm using minutiae to recognize Japanese handwriting
Naturally growing grimmiaceae family mosses as passive biomonitors of heavy metals pollution in urban-industrial atmospheres from the Bilbao Metropolitan area
Get PDFIn analytical chemistry, biomonitoring is known as the methodology, which consider the use of living organisms to monitor and assess the impact of different contaminants in a known area. This type of monitoring is a relatively inexpensive method and easy to implement, being a viable alternative to be developed in sites where there is no infrastructure/instruments for a convenctional air quality monitoring. These organisms, having the capability to monitor the pollution, are also known as passive biomonitors (PBs), since they are able to identify possible contamination sources without the need of any additional tool. In this work, a multianalytical methodology was applied to verify the usefulness of naturally growing Grimmia genus mosses as PBs of atmospheric heavy metals pollution. Once mosses were identified according to their morphology and taxonomy, thei ability to accumulate particulate matter (PM) was determined by SEM. EDS coupled to SEM also allowed to identify the main metallic particles deposited and finally, an acid digestion of the mosses and a subsequent ICP-MS study define more precisely the levels of metals accumulated on each collected moss. The study was focused on six sampling locations from the Bilbao Metropolitan area (Biscay, Basque Country, north of Spain). The experimental evidences obtained allowed to propose naturally growing Grimmia genus as PB of atmospheric heavy metals pollution and to identify the anthropogenic sources that contribute to the emission of the airborne particulate matter rich in metals, evaluating in this sense the atmospheric heavy metals pollution of the selected locations.Gallego-Cartagena, EulerMORILLAS, HECTOR-will be generated-orcid-0000-0002-1265-7814-600Carrero Carrero, Antonio José-will be generated-orcid-0000-0001-5716-8515-600Madariaga, Juan Manuel-will be generated-orcid-0000-0002-1685-6335-600Maguregui, Maite-will be generated-orcid-0000-0001-6011-3590-60
Release kinetics of multi-nutrients from volcanic rock mining by-products: evidences for their use as a soil remineralizer
Get PDFGreat quantities of stone by-products are stored alongside different exploiting mines in south Brazil, which are becoming an unsustainable environmental issue. Powder materials of andesite and dacite rocks were obtained from two mining companies of Southern Brazil. The particle size classification of the materials was determined by sieving. The X-ray diffraction (XRD) technique was used to identify the mineral phases of the by-products and X-ray fluorescence (XRF) was applied to determine their chemical compositions. The concentrations of calcium (Ca), potassium (K), magnesium (Mg), phosphorus (P) and silicon (Si) released by the by-products were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). Dissolution rates of andesite and dacite rocks were measured in Milli-Q water, and in solutions of 0.1 mol L−1 citric acid, and Milli-Q water acidified with 0.5 mol L−1 acetic acid, as a function of reaction times at 24–96 h (short-term), and at 96–5760 h (long-term). The solutions were agitated continuously on a mechanical rotatory shaker at room temperature. The parabolic diffusion, simplified Elovich, and power function models were applied at both time slots of solid-solution reaction. The results indicated that the relationships of quantity of released multi-nutrients were well described by power equation: ln qt = ln a + b ln t. Dissolution rates were obtained based on the release of Ca, K, Mg, P and Si at a steady state under far from equilibrium conditions. Dissolution rates of both by-products were not affected, within the experimental uncertainty, by Milli-Q water. Although the by-products dissolution rates were unaffected by Milli-Q water, its rates are increased along the time. The dissolution of the by-products minerals was significantly affected by the pH of the solutions. The multi-elements release by both by-products in 0.1 mol L−1 citric acid solution was significantly larger than another solutions, indicating that exchangeable cations were readily available in citric acid solution. The results obtained from power function model in two reaction time intervals can contribute to estimate the multi-nutrients-supplying power of by-products to soil. The present study provides both to solving an environmental issue associated with Brazilian rock exploitation and to create an alternative for soil fertilization and a more sustainable agriculture.Gomez Plata, LeandroGindri Ramos, ClaudeteSilva Oliveira, Marcos LeandroSilva Oliveira, Luis Felip
Diseño de un sistema de gestión en seguridad y salud del trabajo en empresa de confecciones Keysha’ar
No full textEl presente trabajo, tiene como propósito diseñar un Sistema de Gestión en Seguridad y
Salud en el Trabajo en la empresa Keysha’ar ubicada en Soledad – Atlántico, la cual,
dedicada su actividad económica a la confección de prendas de vestir. La metodología
utilizada en este documento fue mixta, debido a que, se utilizan dos tipos de variables: las
cualitativas en la que se detallaron las diferentes actividades y procesos realizados en la
organización y cuantitativas para evaluar los riesgos presentes en cada una de las
actividades desarrolladas en la empresa y los niveles de cumplimiento de la empresa, con
relación a la Res. 0312 de 2019. El diagnóstico inicial de Keysha’ar se realizó con base en
los requisitos mínimos establecidos por el Ministerio de Trabajo, por medio del cual se
busca identificar los requisitos mínimos que debe cumplir y cómo se encuentra en cuanto al
cumplimiento de los estándares en SG-SST, al finalizar el diagnóstico inicial se realizó la
identificación de peligros y evaluación de riesgos, por medio de la IPVR (GTC 45 de 2012)
Con los resultados obtenidos, se presenta una propuesta del diseño de un Sistema de
Gestión en Seguridad y Salud en el Trabajo, con base a la normatividad legal vigente en
SST.The purpose of this research work is to design an Occupational Health and Safety
Management System in the company Keysha'ar located in Soledad - Atlántico, which is
dedicated its economic activity to the manufacture of clothing. The methodology used in
this document was mixed, because two types of variables are used: qualitative ones in
which the different activities and processes carried out in the organization were detailed
and quantitative ones to evaluate the risks present in each of the activities developed in the
company and the levels of compliance of the company, in relation to Resolution 0312 of
2019. The initial diagnosis of Keysha'ar was performed based on the minimum
requirements established by the Ministerio de Trabajo, through which it seeks to identify
the minimum requirements to be met and how it is in terms of compliance with the
standards in SG-SST, at the end of the initial diagnosis was performed the identification of
hazards and risk assessment, through the IPVR (GTC 45 of 2012).
With the results obtained, a proposal for the design of an Occupational Health and Safety
Management System is presented, based on the current legal regulations in OSH.Introducción 12--
Planteamiento del problema 14--
Justificación--17--
Objetivos 18
Objetivo general 18--
Objetivos específicos.18--
Estado del arte19-
Marco teórico 23--
Seguridad y Salud en el Trabajo (SST) 23--
Sistema de Gestión de la Seguridad y Salud en el Trabajo (SG-SST) 23--
Ciclo PHVA 24--
Accidente de trabajo 24--
Incidente de trabajo 25---
Medidas preventivas y correctivas 25--
Peligro 25--
Riesgo 25-
Enfermedad Laboral 25---
Acción preventiva26-
Acción correctiva26---
Higiene industrial26-
Condición subestándar26--
Acto subestándar26
Investigación de incidentes o accidentes de trabajo27---
Informe de investigación 27--
Identificación de peligros y evaluación de los riesgos 27-
Marco legal 28---
Decreto 1072 de 2015 28-
Ley 1562 de 2012 28--
GTC 45 de 2012 28--
ISO 45001 de 2019 28---
Resolución 1401 de 2007 29-
Resolución 2346 de 2007 29---
Resolución 0312 de 2019 29-
Decreto 1443 de 2014 29---
Resolución 2013 de 1986 29-
Materiales y métodos31---
Descripción de la empresa31--
Procesos dentro de la empresa. 32--
Maquinaria34--
Método de investigación y técnicas de recolección35--
Resultados37--
Cumplimiento de etapas ciclo PHVA 37--
Matriz de identificación de peligros y valoración de riesgos39--
Requisitos aplicables a la empresa de confecciones KEYSHA’AR39--
Conclusiones40--
Recomendaciones43--
Referencias45--Ingeniero(a) IndustrialPregrad