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Polishing of painting process effluents through adsorption with biochar from winemaking residues
No full textA real industrial efuent from the pre-treatment and painting processes was polished through adsorption using alternative
biochar derived from grape pomace wastes. The biochar was produced in a pilot-scale plant from composted grape pomace.
Biochar showed an equilibrium between acidic and basic groups on the surface. The presence of irregular cavities in the
structure and mesopores was confrmed by analyzing N2 physisorption and SEM. Concerning the efuent, Ni and Zn were
the main problematic elements. The adsorption isotherms and kinetics of Ni and Zn from the efuent using the biochar could
be represented by the Henry, pseudo-frst-order, and pseudo-second-order models, respectively. Adsorption equilibrium was
reached within 60 min for Ni and Zn present in the real efuent. Besides, the adsorption process was endothermic, favorable,
and spontaneous. These results demonstrate that Zn and Ni metals were successfully removed from the industrial efuent,
presenting fnal concentration values within the limit of legislation for efuent disposal in agricultural soil
Consorcio Colombia Primer webinar del 2022
No full textPrimer Webinar Consorcio Colombia 2022, Se parte de este
encuentro que busca capacitar en el uso efectivo y acceso a las
bases de datos internacionales de alta suscritas por tu institución.
El objetivo de esta capacitación es mostrar la riqueza de las bases
de datos y enseñar estrategias para realizar búsquedas efectivas
Pedagogical opportunities of emotional intelligence in higher studies
No full textLa investigación busca analizar las oportunidades que brinda la inteligencia emocional como fortaleza de las mejores pedagogías universitarias. Emplea el diálogo como habilidad para la construcción de conocimientos al poner en el espacio intersubjetivo los razonamientos y sensaciones que del mundo se tienen. A su vez, maneja y resuelve los conflictos de la mejor forma posible con la finalidad de crear correctos ambientes educativos, favoreciendo la expresión de la racionalidad crítica como capacidad de conjunto. Se trata de conformar sociedades democráticas al habilitar acertadas competencias comunicativas. Destaca el saber científico no solo como producto intelectual; puesto que la ciencia es también manifestación la dimensión sensitiva. Pues, se parte del principio epistémico que los razonamientos son siempre abstracciones que se realizan a partir del mundo que se siente. La indagación se efectúa desde el enfoque de estudio de caso; pues, caracteriza una situación particular con la intención de inferir saberes generalizables, con alta confiabilidad.The research seeks to analyze the opportunities offered by emotional intelligence as a strength of the best university pedagogies. It uses dialogue as a skill for the construction of knowledge by putting in the intersubjective space the reasoning and sensations that one has of the world. At the same time, it manages and resolves conflicts in the best possible way in order to create correct educational environments, favoring the expression of critical rationality as a collective capacity. It is about shaping democratic societies by enabling successful communication skills. Scientific knowledge stands out not only as an intellectual product; since science is also a manifestation of the sensitive dimension. Well, it starts from the epistemic principle that reasonings are always abstractions that are made from the world that is felt. The inquiry is carried out from the case study approach; Thus, it characterizes a particular situation with the intention of inferring generalizable knowledge, with high reliability
Compressão do conceito de razão através do modelo de Pirie e Kieren
No full textBackground: Research in educational mathematics has shown that elementary school students poorly understand the concept of ratio due to the difficulties that emerge from its interpretation as a fraction. Objective: Therefore, based on the Pirie-Kieren theoretical model, we intend to analyse the comprehension process that appears when students solve tasks on ratio. Design: The approach is qualitative, and the research design was a case study. We used the field observation technique. Context and participants: The study was done in a primary school in the state of Guerrero, Mexico. The cases involved four students (11-12 years old) enrolled in the 6th grade. Data collection and analysis: The data was collected through a questionnaire (task) and an interview. For data analysis, the eight levels of understanding of the theoretical model were used. Results: The results indicate that the students do not manage to formalise their comprehension of the concept of ratio because of difficulties in applying mathematical strategies correctly when solving the proposed tasks. Conclusion: The results indicate that for studentsto reach higher levels of comprehension, it is necessary to carry out the dynamic process of repeating between levels as it makes one reflect on what is required to advance comprehension.Contexto: Investigaciones en Matemática Educativa, han puesto de manifiesto que estudiantes de primaria tienen una deficiente comprensión sobre el concepto razón debido a las dificultades que emergen desde su interpretación como fracción. Objetivo: Por lo que es necesario analizar el proceso de comprensión fundamentado desde el modelo teórico de Pirie y Kieren, que emerge al resolver tareas sobre el concepto razón. Diseño: El enfoque es de corte cualitativo, y el diseño de la investigación fue un estudio de caso. Se usó la técnica de observación de campo. Contexto y participantes: El estudio se llevó a cabo en una escuela primaria en el estado de Guerrero-México. Los casos se conformaron por cuatro estudiantes (11 – 12 años) inscritos al sexto grado. Recolección de datos y análisis: Los datos se recolectaron a través de un cuestionario (tarea) y una entrevista. Para el análisis de datos se usaron los ocho niveles de comprensión del modelo teórico. Resultados: Los resultados indican que los estudiantes no logran formalizar su proceso de comprensión en relación con el concepto de razón, debido a, las dificultades que presentan para aplicar correctamente estrategias matemáticas al resolver las tareas propuestas. Conclusión: Los resultados indican que, para alcanzar altos niveles de comprensión, es necesario realizar el proceso dinámico de redoblar entre niveles, puesto que se reflexiona sobre lo necesario para avanzar en el proceso de comprensión mismo.Contexto: Pesquisas em Matemática Educacional mostraram que alunos do ensino fundamental têm uma compreensão deficiente do conceito de razão devido às dificuldades que emergem de sua interpretação como fração. Objetivo: Portanto, é necessário analisar o processo de compreensão com base no modelo teórico de Pirie e Kieren, que emerge ao resolver tarefas sobre o conceito de razão. Desenho: A abordagem é qualitativa, e o desenho da pesquisa foi um estudo de caso. Foi utilizada a técnica de observação de campo. Contexto e participantes: O estudo foi realizado em uma escola primária do estado de Guerrero-México. Os casos foram compostos por quatro alunos (11-12 anos) matriculados na sexta série. Coleta e análise dos dados: Os dados foram coletados por meio de questionário (tarefa) e entrevista. Para análise dos dados, foram utilizados os oito níveis de compreensão do modelo teórico. Resultados: Os resultados indicam que os alunos não conseguem formalizar seu processo de compreensão em relação ao conceito de razão, devido às dificuldades que apresentam em aplicar corretamente as estratégias matemáticas na resolução das tarefas propostas. Conclusão: Os resultados indicam que, para atingir níveis elevados de compreensão, é necessário realizar o processo dinâmico de redobrar entre os níveis, pois reflete sobre o que é necessário avançar no próprio processo de compreensão
Determinants of open innovation in low-tech SMEs: the influence of the top management team and employees' human capital
No full textThis article aims to analyze the influence of top management team (TMT) characteristics and employees’ human capital on the adoption of open
innovation practices in low-tech SMEs. The empirical study is based on the use of structural equations from the data derived from a questionnaire
applied to 95 companies in the agro-industrial sector located in the northeastern region of Colombia. The results indicate that both the TMT’s
diversity and coordination have a significant and positive influence on the adoption of open innovation practices. On the other hand, regarding
human capital, the results indicate that the experience of the employees is a more decisive feature when implementing open innovation strategies
than their level of education and training. This paper contributes to the literature by providing part of the missing microfoundations of open innovation and more strongly connecting open innovation, human capital, and TMT configuration.Este artículo tiene como objetivo analizar la influencia de las características del equipo de alta dirección (TMT) y el capital humano de los empleados en la adopción de prácticas de innovación abierta en las pymes de baja tecnología. El estudio empírico se basa en el uso de ecuaciones
estructurales a partir de los datos derivados de un cuestionario aplicado a 95 empresas del sector agroindustrial ubicadas en la región noreste de
Colombia. Los resultados indican que tanto la diversidad como la coordinación del TMT tienen una influencia significativa y positiva en la adopción de prácticas de innovación abierta. Por otro lado, en cuanto al capital humano, los resultados indican que la experiencia de los empleados
es un rasgo más determinante a la hora de implementar estrategias de innovación abierta que su nivel de educación y formación. Este artículo
contribuye a la literatura al proporcionar parte de los microfundamentos faltantes de la innovación abierta y al conectar de manera más sólida la
innovación abierta, el capital humano y la configuración de TMT
Proyectos de vida desde la construcción de subjetividades de estudiantes de básica secundaria como eje transversal de formación
No full textEl presente estudio tuvo como objetivo, diseñar una propuesta pedagógica pensada desde la elaboración de proyectos de vida por estudiantes de noveno de básica secundaria, para su articulación con los ejes transversales de formación de 2 instituciones educativas oficiales correspondientes al departamento del Magdalena y distrito de Cartagena. Para ello se optó un enfoque cualitativo basado en el paradigma histórico-hermenéutico y sustentado en la investigación fenomenológica. Las unidades de análisis fueron 10 estudiantes, 5 mujeres y 5 hombres en edades entre los 14 y 16 años, pertenecientes al grado noveno de dos establecimientos educativos oficiales, los cuales estuvieron distribuidos de la siguiente manera: 5 participantes correspondientes a la Institución Educativa Departamental de Bomba (IEDB), ubicada en el Corregimiento de Pedraza-Magdalena, y 5 informantes pertenecientes a la Institución Etnoeducativa Puerto Rey (IEPR) del distrito de Cartagena. Las técnicas e instrumentos de recolección de datos fueron los grupos focales, la entrevista semiestructurada y la revisión documental, cuyos hallazgos mostraron que pese a las situaciones adversas por las que los participantes habían pasado en algún momento de sus vida, tenían la entereza y perseverancia necesaria para cumplir sus metas a corto, mediano y largo plazo, razón por la cual se concluye que el estudio contribuyó significativamente a que los sujetos de estudio se reencontraran consigo mismos, por lo cual reconsideraron en seguir construyendo permanentemente sus proyectos de vida como la apuesta de un futuro promisorio.The present study had as objective, to design a pedagogical proposal thought from the elaboration of life projects by students of ninth grade of secondary school, for its articulation with the transverse axes of formation of 2 official educational institutions corresponding to the department of Magdalena and district of Cartagena. For this, a qualitative approach based on the historicalhermeneutical paradigm and supported by phenomenological research was chosen. The units of analysis were 10 students, 5 women and 5 men between the ages of 14 and 16, belonging to the ninth grade of two official educational establishments, which were distributed as follows: 5 participants belonging to the Departmental Educational Institution of Bomba (IEDB), located in the Corregimiento of Pedraza-Magdalena, and 5 Puerto Rey Ethno-educational Institution (IEPR) belonging to the district of Cartagena. The data collection techniques and instruments were the focus groups, the semi-structured interview and the documentary review, whose findings showed that despite the adverse situations that the participants had experienced at some point in their lives, they had the necessary integrity and perseverance. to meet their goals in the short, medium, and long term, which is why it is concluded that the study contributed significantly to the study subjects rediscovering themselves, for which they reconsidered continuing to permanently build their life projects as the bet of a promising future.Resumen 4 -- Abstract 5 -- Introducción 6 -- Capítulo I 8 -- 1. Problema de Investigación 8 -- 1.1. Caracterización de la Situación Objeto de Estudio 8 -- 1.2. Delimitación del Problema 10 -- 1.3. Formulación de la Situación Objeto de Estudio 11 -- 1.4. Objetivo General 12 -- 1.5. Objetivos Específicos 12 -- 1.6. Justificación 12 -- Capítulo II 15 -- 2. Marco Teórico-conceptual 15 -- 2.1. Marco Teórico 15 -- 2.2. Referentes Teóricos 26 -- 2.3. Proyecto de Vida 27 -- 2.4. Subjetividad 28 -- 2.5. Formación 30 -- 2.6. Marco Normativo 33 -- Capítulo III 37 --3. Aspectos Metodológicos 37 -- 3.1. Enfoque 37 -- 3.2. Paradigma 38 -- 3.3. Método 40 -- 3.4. Técnicas de Recolección de Datos 41 -- 3.5. Selección de los Informantes 43 -- 3.6. Validez y Confiabilidad de los Instrumentos 43 -- 3.7. Técnica de Análisis de la Información 44 -- 3.8 Análisis de Resultados 44 -- Capitulo IV 81 -- Conclusiones y Recomendaciones 81 -- Anexos 90 -- Referencias 117Magíster en EducaciónMaestrí
Effects of a sexual risk-reduction intervention for teenagers: a cluster-randomized control trial
No full textThis study evaluated the efficacy of the COMPAS program in the short term and 6 months after its application. For the initial sample, 2047 teenagers aged 14–19 years from 14 schools in 11 Colombian cities participated; eight schools were randomly assigned to the experimental condition and six to the control group. The participants completed self-report assessments that evaluated several variables theoretically associated with protective sexual behaviors. In the short term, the experimental group showed increased knowledge about HIV and other STIs, sexual assertiveness, self-efficacy, greater behavioral intention toward condom use, and more favorable attitudes toward HIV and condom use than the control group. After 6 months, most psychological and health variables also showed a significant positive change. In conclusion, the COMPAS program is the first school-based sexuality education program that has been shown to be effective in reducing mediating and behavioral variables associated with sexual risk reduction in Colombia.Este estudio evaluó la eficacia del programa COMPAS a corto plazo y a 6 meses después de la aplicación. Para la muestra inicial participaron 2.047 adolescentes de 14 a 19 años provenientes de 12 escuelas en 11 ciudades colombianas; 8 escuelas fueron aleatoriamente asignadas a la condición experimental y 6 al grupo control. Los participantes completaron autoinformes sobre variables teóricamente asociadas con comportamientos sexuales de protección. A corto plazo, el grupo experimental mostró un mayor conocimiento sobre ITS, asertividad sexual, autoeficacia e intención conductual hacia el uso del condón y actitudes más favorables hacia el VIH que el grupo de control. Después de seis meses, la mayoría de las variables psicológicas y de salud también mostraron un cambio positivo. En conclusión, el programa COMPAS es el primer programa de educación sexual que ha demostrado ser efectivo para reducir las variables mediadoras y conductuales asociadas con la reducción del riesgo sexual en Colombia
Air quality changes during the COVID-19 lockdown in an industrial city in North China: post-pandemic proposals for air quality improvement
No full textTo better understand the changes in air pollutants in an industrial city, Handan, North China, during the COVID-19 lockdown period, the air quality and meteorological conditions were recorded from 1 January to 3 March 2020 and the corresponding period in 2019. Compared to the corresponding period in 2019, the largest reduction in PM2.5–10, PM2.5, NO2 and CO occurred during the COVID-19 lockdown period. PM2.5–10 displayed the highest reduction (66.6%), followed by NO2 (58.4%) and PM2.5 (50.1%), while O3 increased by 13.9%. Similarly, compared with the pre-COVID-19 period, NO2 significantly decreased by 66.1% during the COVID-19 lockdown, followed by PM2.5–10 (45.9%) and PM2.5 (42.4%), while O3 increased significantly (126%). Among the different functional areas, PM2.5 and PM2.5–10 dropped the most in the commercial area during the COVID-19 lockdown. NO2 and SO2 decreased the most in the traffic and residential areas, respectively, while NO2 increased only in the township and SO2 increased the most in the industrial area. O3 increased in all functional areas to different extents. Potential source contribution function analysis indicated that not only the local air pollution lessened, but also long-distance or inter-regional transport contributed much less to heavy pollution during the lockdown period. These results indicate that the COVID-19 lockdown measures led to significantly reduced PM and NO2 but increased O3 , highlighting the importance of the synergetic control of PM2.5 and O3 , as well as regional joint prevention and the control of air pollution. Moreover, it is necessary to formulate air pollution control measures according to functional areas on a city scale
Portable hook prototype design for bathrooms
No full textEn los baños de mujeres de la Universidad de la Costa ubicados en el bloque 11 y 12, no se encuentran disponibles ganchos para colgar los objetos personales, de modo que esto no genera comodidad y seguridad al momento de entrar al cubículo. Cuando se ingresa a él con sus respectivas pertenencias personales, las mujeres requieren despojarse de ellas, generando inconformidad porque no saben dónde colocarlo los objetos; por lo tanto, se opta por tomar medidas que no son las más adecuadas e higiénicas, como colocar sus pertenencias en la caneca o en el piso. El objetivo principal fue diseñar un gancho práctico, portátil y multifuncional, que con su diseño, funcionamiento e implementación haga sentir a las estudiantes de la Universidad de la Costa cómodas y seguras en los baños de toda la instalación. Para esto, la metodología del proyecto se dividió en 4 fases, que son: Definición del problema, Definición del concepto, La representación de los esquemas, y Desarrollo de detalles. Estas fases permitieron hacer una identificación del problema, buscar una solución y representarla a partir de un modelo 3D con Fusion360 y un prototipo físico-funcional. Al concluir, se tiene un diseño que cumple con las características necesarias para el problema planteado. Se obtiene un gancho portátil para baños que garantiza la comodidad en el uso de este productoIn the women's bathrooms of the Universidad de la Costa located in blocks 11 and 12, there are no hooks available to hang personal belongings, so this does not generate comfort and safety when entering the cubicle. When they enter it with their respective personal belongings, the women need to get rid of them, presenting nonconformity because they do not know where to place the objects; therefore, they choose to take measures that are not the most appropriate and hygienic, such as placing their belongings in the bin or on the floor. The main objective was to design a practical, portable and multifunctional hook that, with its design, operation and implementation, makes the students of the Universidad de la Costa feel comfortable and safe in the bathrooms of the entire facility. For this, the project methodology was divided into 4 phases, which are: Definition of the problem, Definition of the concept, Representation of the schemes, and Development of details. These phases allowed us to identify the problem, find a solution and represent it from a 3D model with Fusion360 and a physical-functional prototype. At the end, there is a design that meets the necessary characteristics for the problem posed. You get a portable hook for bathrooms that guarantees comfort in the use of this produc
Energy simulation and parametric analysis of water cooled thermal photovoltaic systems: energy and exergy analysis of photovoltaic systems
No full textIt is generally agreed that solar energy, which can be converted into usable electricity by means of solar panels, is one of the most important renewable energy sources. An energy and exergy study of these panels is the first step in developing this technology. This will provide a fair standard by which solar panel efficiency can be evaluated. In this study, the MATLAB tool was used to find the answers to the math problems that describe this system. The system’s efficiency has been calculated using the modeled data created in MATLAB. When solving equations, the initial value of the independent system parameters is fed into the computer in accordance with the algorithm of the program. A simulation and a parametric analysis of a thermal PV system with a sheet and spiral tube configuration have been completed. Simulations based on a numerical model have been run to determine where precisely the sheet and helical tubes should be placed in a PV/T system configured for cold water. Since then, the MATLAB code for the proposed model has been developed, and it agrees well with the experimental data. There is an RMSE of 0.94 for this model. The results indicate that the modeled sample achieves a thermal efficiency of between 43% and 52% and an electrical efficiency of between 11% and 11.5%