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Development of an online optical prototype for the simultaneous analysis of defects or gels in industrially synthesized polypropylene films. Part 1: Comparison with ASTM D 3351–93 methods
No full textPolypropylene (PP) films are crucial in various industrial applications, from packaging to medical products. However, a common challenge in PP manufacturing is the presence of gel-like defects. These gels are minor defects on the surface of the films that significantly affect the physicochemical, mechanical, and organoleptic properties of the films, compromising the quality of the final product. This first research focuses on developing and validating an in-line optical method to replace the international method ASTM D 3351–93. The main objective was to create a methodology that has the same scope and analytical performance as those reported by ASTM D 3351–93 in such a way that it can compete with it in terms of precision and accuracy, thus allowing end users to this ASTM, such as PP producers, PP marketers, PP film producers, among others internationally, can use this new methodology with necessary analytical support. This analytical methodology integrates the PP extrusion zones, the film processing stages, and the optical zone for reading and processing analytical data. Additionally, it has the advantage of working with a sample size that is even more representative of the population and has less human error since only one operator is required to carry out the test; this method also has much shorter response times. The developed prototype had 14 online stages that allowed representative quantities of samples to be taken and processed thermally and mechanically for ideal optical measurement. For the online method, a 6-point calibration curve is carried out at concentrations of 40, 10, 5, 2, 1 and 0 ppm for the gel or defect sizes of 200, 400, 500, 600, 700, 800 and 900 µm, showing excellent linearity where the correlation coefficient varied between 0.997 and 0.999, the limits of detection (LOD) varied between 0.85 and 2.61 and the limits of quantification (LOQ) ranged between 2.82 and 8.71. The statistical analyzes by ANOVA of the comparison between the ASTM D 3351–93 method and the proposed simultaneous method indicate that the p value of the evaluation of the means was 0.946, which suggests that the means are not statistically different. To complement, the Tukey test was carried out at 95 %, indicating that the methods have statistical equivalence
Desarrollo de una solución tecnológica de cursos inteligentes fundamentados en el modelo de aprendizaje personalizado y estilos de aprendizaje con machine learning
No full textMANGUS SAS, is an EdTech with more than 3 years of experience and extensive participation in Technological Projects for training in public and private organizations of various sectors of the economy, owner of the Mangus Platform; Its fundamental axis is innovation and emerging technologies, it contributes to the development of new skills in professionals in the digital era. The proposed product innovation project seeks to develop a personalized learning technological solution based on artificial intelligence to be integrated into the Mangus platform for the offer of intelligent courses based on the learning styles and training needs of the user through Learning Analytics (LA) analysis tools and artificial intelligence (AI) algorithms. that allows generating a personalized course plan with digital resources, evaluative activities and course formats according to the interests, needs and learning styles of those interested in training; it is supported by a virtual Learning Environment and a personalized education model. The project works under a mixed approach through documentary review that allows identifying training profiles, learning styles of the participants and a field study to collect information through co-creation workshops and working groups with personnel from key areas of the beneficiary entities of the project for the design, development, validation and implementation of innovation. The MANGUS platform will leverage artificial intelligence to tailor content based on the knowledge of each user in training rather than providing a one-size-fits-all approach. The project meets the company's 2026 vision of being one of the leaders in the Hispanic-American market of virtual education platforms for the training of professionals. Its mission is to achieve more motivated professionals who want to access learning at all times and its strategic objective is to achieve the transformation of education, therefore, the project contributes to the mission, the scope of the vision and the achievement of its first strategic objective of improving education based on digital transformation.MANGUS SAS, es una EdTech con mas de 3 años de experiencia y amplia participación en Proyectos Tecnológicos para la formación en organizaciones públicas y privadas de diversos sectores de la economía, propietaria de la Plataforma Mangus; su eje fundamental es la innovación y las tecnologías emergentes, aporta al desarrollo de nuevas competencias en los profesionales en la era digital. El proyecto de innovación de producto propuesto, busca desarrollar una solución tecnológica de aprendizaje personalizado basada en inteligencia artificial para ser integrada a la plataforma Mangus para la oferta de cursos inteligentes a partir de los estilos de aprendizaje y necesidades de formación del usuario a través de herramientas de análisis Learning Analytics (LA) y algoritmos de inteligencia artificial (IA), que permita generar un plan de cursos personalizado con recursos digitales, actividades evaluativas y formatos de cursos acorde con los intereses, necesidades y estilos de aprendizaje de los interesados en formarse; se soporta en un Ambiente de Aprendizaje virtual y un modelo de educación personalizada. El proyecto trabaja bajo un enfoque mixto a través de la revisión documental que permite identificar perfiles de formaciòn, estilos de aprendizaje de los participantes y un estudio de campo para recabar información mediante talleres de cocreaciòn y mesas de trabajo con personal de áreas clave de las entidades beneficiarias del proyecto para el diseño, desarrollo, validación e implmentaciòn de la innovacion. La plataforma MANGUS aprovechará la inteligencia artificial para adaptar el contenido en función del conocimiento de cada usuario en formación en lugar de proporcionar un enfoque único para todos. El proyecto atiende a la visión 2026 de la empresa de ser uno de los líderes en el mercado hispanoamericano de plataformas de educación virtual para la formación de profesionales. Su misión es lograr profesionales más motivados que quieren acceder al aprendizaje en todo momento y su objetivo estratégico de lograr la transformación de la educación, por tanto, el proyecto aporta a la misión, al alcance de la visión y al logro de su primer objetivo estratégico de mejorar la educación basándose en la transformación digital.Lista de tablas 2-- Lista de figuras 3-- Objetivos 9-- Metodología 11-- Planteamiento del problema o necesidad 17-- Mercado 20-- Propuesta de valor 30-- Modelo de noegocio 36-- Prototipado 42-- Presupuesto y proyecciones 106-- Marketing y ventas 108-- Impacto ambiental del proyecto 110-- Landing page 111-- Deck de inversión 111-- Conclusiones 114-- Referencias 116--Magíster en AdministraciónMaestrí
Application of statistical physical, DFT computation and molecular dynamics simulation for enhanced removal of crystal violet and basic fuchsin dyes utilizing biosorbent derived from residual watermelon seeds (Citrullus lanatus)
No full textThis study investigates the use of watermelon seeds (Citrullus lanatus), a plentiful and cost-effective biosorbent, for the removal of basic fuchsin (BF) and crystal violet (CV) dyes from aqueous solutions. Characterization of the biosorbent was conducted using Fourier Transform Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM), while Brunauer–Emmett–Teller (BET) analysis revealed a specific surface area (SBET) of 54.50 m² g−1, highlighting its mesoporous structure advantageous for adsorption. Adsorption isotherms were best described by the Langmuir model, indicating monolayer adsorption with high correlation coefficients (R² values of 0.9959 for CV and 0.9978 for BF) and notable adsorption capacities of 139.2493 mg g−1 for CV and 238.80501 mg g−1 for BF. Thermodynamic analysis confirmed the spontaneous and exothermic nature of the adsorption, driven by molecular interactions. To elucidate the adsorption mechanism at the molecular level, we employed Density Functional Theory (DFT) calculations, Molecular Dynamics (MD) simulations, and Non-Covalent Interaction (NCI) analysis. These computational methods provided insights that closely aligned with experimental data, establishing a robust theoretical-experimental framework for understanding dye adsorption by watermelon seed biosorbent. The practical implications of our findings are significant, suggesting that watermelon seed biosorbent can be effectively scaled up for industrial effluent treatment in continuous systems. The study underscores the potential of utilizing this sustainable and economically viable biosorbent for environmental remediation, offering a promising alternative to conventional adsorbents with its high efficiency and lower sensitivity to environmental conditions such as pH and temperature
COVID-19: Unveiling the Neuropsychiatric Maze—From Acute to Long-Term Manifestations
No full textThe SARS-CoV-2 virus has spread rapidly despite implementing strategies to reduce its transmission. The disease caused by this virus has been associated with a diverse range of symptoms, including common neurological manifestations such as dysgeusia, anosmia, and myalgias. Additionally, numerous cases of severe neurological complications associated with this disease have been reported, including encephalitis, stroke, seizures, and Guillain–Barré syndrome, among others. Given the high prevalence of neurological manifestations in this disease, the objective of this review is to analyze the mechanisms by which this virus can affect the nervous system, from its direct invasion to aberrant activation of the immune system and other mechanisms involved in the symptoms, including neuropsychiatric manifestations, to gain a better understanding of the disease and thus facilitate the search for effective therapeutic strategies
Design of photovoltaic systems in Industrial electrical systems considering power quality
No full textThis paper presents a comprehensive design methodology for photovoltaic systems (PVS) integrated into industrial electrical systems (IES), with a specific focus on preserving power quality (PQ). The 10-step methodology, ranging from initial interviews to detailed technical, energy, and economic assessments, is novel for its multi-factorial approach that combines an Excel application with ETAP software, prioritizing considerations for PQ. Evaluation across four scenarios demonstrated varying outcomes. In the worst-case technical and energy scenario, PVS installation on Point of Common Connection without PQ mitigation led to significant increases in harmonics and no reduction in energy consumption. Conversely, the best technical and energy scenario involved distributing PVS across load buses with PQ mitigation, resulting in a 5% reduction in energy consumption and 27% lower energy losses. The economic evaluation indicated a 3-year payback period in all scenarios, primarily attributed to increased costs for PQ problem mitigation equipment. It was also observed that reducing losses and energy consumption limits the economic benefits of installing PVS in IES. This methodology serves as a valuable guide for designing PVS in IES, incorporating technical, energy, economic, and PQ considerations
Relación entre la imagen de marca y la intención de compra con base en una empresa de muebles en Colombia
No full textEn un contexto de transformación del mercado, donde la competitividad se ve impulsada por la llegada de nuevos competidores y el auge del comercio electrónico, entender la percepción del consumidor frente a la imagen de marca e intención de compra es crucial. La presente investigación tiene como objetivo analizar la correlación entre la imagen de marca y la intención de compra en una empresa de muebles en Colombia. La investigación se basa en un estudio de caso que recolectó información cuantitativa a través de una encuesta aplicada a 152 personas en Barranquilla y su área metropolitana. Los resultados muestran que la reputación de la empresa es la dimensión mejor valorada dentro de la imagen de marca, lo que destaca su confiabilidad y presencia consolidada en el mercado. Sin embargo, aspectos como el compromiso social y la percepción de precios elevados representan áreas de mejora, ya que afectan negativamente la conexión emocional de los consumidores con la marca y su disposición a comprar. En términos de la dimensión funcional, si bien obtuvo una valoración positiva, fue percibida como menos relevante en comparación con la reputación y la dimensión afectiva. La intención de compra presenta una probabilidad moderada, aunque limitada por la percepción de que los productos son costosos. Los consumidores manifiestan una disposición favorable a comprar, pero indican que el precio y los largos plazos de financiamiento afectan su decisión final. Además, la investigación revela que la percepción de la marca está moderadamente influenciada por la reputación, pero factores emocionales y funcionales también juegan un rol importante en la intención de compra. La relación entre imagen de marca e intención de compra es positiva y moderada, lo que sugiere que una mejora en la percepción de la marca podría aumentar la intención de compra, siempre y cuando se trabajen aspectos como la percepción de valor por el precio ofrecido y el fortalecimiento del compromiso social. Por lo tanto, la empresa debe ajustar su estrategia, particularmente en relación con los precios percibidos como altos y los plazos de financiamiento, para mejorar la intención de compra. Además, se sugiere que futuros estudios amplíen el análisis a otras regiones del país para obtener una visión más completa y representativa del impacto de la imagen de marca en diferentes mercados y segmentos. Se concluye que, aunque la reputación es un pilar clave, la empresa debe optimizar su estrategia de precios y reforzar su responsabilidad social para atraer más compradores y mejorar su competitividad en todo el país. Es esencial trabajar en la dimensión funcional para aumentar la percepción de valor de los productos, asegurando que la marca se mantenga competitiva frente a las nuevas tendencias del mercado.In a rapidly transforming market, where competitiveness is driven by the arrival of new competitors and the rise of e-commerce, understanding consumer perception of brand image and purchase intention is crucial. This research aims to analyze the correlation between brand image and purchase intention in a furniture company in Colombia. The study is based on a case study that collected quantitative data through a survey applied to 152 people in Barranquilla and its metropolitan area. The results show that the company's reputation is the highest-rated dimension of the brand image, highlighting its reliability and well-established presence in the market. However, aspects such as social commitment and the perception of high prices represent areas for improvement, as they negatively impact consumers' emotional connection with the brand and their willingness to buy. In terms of the functional dimension, while it received a positive rating, it was perceived as less relevant compared to reputation and the affective dimension. Purchase intention shows a moderate probability, though limited by the perception that the products are expensive. Consumers express a favorable willingness to buy but indicate that price and long financing terms affect their final decision. Additionally, the research reveals that brand perception is moderately influenced by reputation, but emotional and functional factors also play an important role in purchase intention. The relationship between brand image and purchase intention is positive and moderate, suggesting that improving brand perception could increase purchase intention, provided that areas such as perceived value for the offered price and social commitment are addressed. Therefore, the company must adjust its strategy, particularly regarding the high perceived prices and financing terms, to improve purchase intention. Moreover, it is recommended that future studies expand the analysis to other regions of the country to obtain a more complete and representative view of the impact of brand image in different markets and segments. It is concluded that, although reputation is a key pillar, the company must optimize its pricing strategy and strengthen its social responsibility to attract more buyers and improve its competitiveness across the country. It is essential to work on the functional dimension to enhance the perceived value of the products, ensuring that the brand remains competitive in light of new market trendsLista de tablas y figuras 9 -- Introducción 10 -- Capítulo I: Problema De Investigación 12 -- Planteamiento Del Problema 12 -- Formulación Del Interrogante De Investigación 15 -- Objetivos De La Investigación 16 -- Objetivo General 16 -- Objetivo Específicos 16 -- Justificación De La Investigación 17 -- Delimitación De La Investigación 18 -- Capítulo II: Perspectiva Teórica 18 -- Estudios Previos 18 -- Desarrollo Teórico De Conceptos Clave 27 -- Imagen De Marca 28 -- Intención De Compra 33 -- Capítulo III: Metodología Del Proyecto 42 -- Método De Investigación 42 -- Tipo De Investigación Según El Alcance 42 -- Diseño De Investigación 43 -- Población Objeto De Estudio 43 -- Muestra Seleccionada 44 -- Técnicas De Recolección De Información 45 -- Técnica De Procesamiento De Datos 46 -- Capítulo IV: Resultados De La Investigación 48 -- Caracterización De Los Participantes: 48 -- Resultados De La Percepción Frente A La Imagen De Marca De La Empresa De Muebles 51 -- Resultados De La Intención De Compra Mostrada Por El Público 60 -- Correlación Entre La Imagen De Marca E Intención De Compra Con Base En Una Empresa De Muebles 67 -- Conclusiones 71 -- Recomendaciones 73 -- Referencias 76Magíster en Gestión de MercadeoMaestrí
Atención en salud de la población LGBTIQ+ para las cirugías de reasignación de sexo 2017-2023: revisión documental
No full textEl término resignación de sexo, también conocida como cirugía de afirmación de sexo, sugiere una serie procedimientos médicos diseñados para ayudar a las personas transgénero a ajustar su cuerpo de acuerdo con su identidad de género percibida. El presente estudio tiene como objetivo principal, determinar cómo es la atención en salud de la población LGBTIQ para las cirugías de reasignación de sexo. Se llevó a cabo, una revisión de la literatura documental. Se utilizó una variedad de fuentes primarias, que incluyeron literatura científica en español y en inglés. La búsqueda de información se realizó en bases de datos científicas especializadas como, PUB MED, REDALYC, Scielo, Science Direct y Google Scholar, lo que permitió acceder a una amplia gama de estudios y documentos relevantes para la revisión. A través de este proceso de revisión, se extrajo información relevante de los estudios seleccionados, incluyendo hallazgos, conclusiones, métodos de investigación y detalles importantes para el análisis. Los resultados se analizaron y se presentaron en una matriz de caracterización de producción científica, y como criterio de selección se tuvo en cuenta el tiempo de publicación del año 2017 al 2023. Entre los hallazgos, se evidencio la escasa o nula información acerca de las cirugías de reasignación de sexo en la comunidad LGBTIQ+, sin embargo, existe mucha literatura acerca de la percepción que tienen de la prestación de servicios de salud como discriminatoria y poco empática, que sus derechos no son tomados en cuenta o vulnerados por parte de los profesionales de la salud y algunas empresas administradoras de beneficios EAPB, muy a pesar de toda la normativa existente en el mundo. Conclusión: En esta revisión se concluye que la población LGBTIQ+, tiene conocimiento de las garantías, derecho y atenciones en salud por parte de su EAPB, para la realización de cirugía de cambio de sexo y de los trámites necesarios para solicitarla, realmente son las barreras existentes las que no permiten en la mayoría de los casos llegar al final del proceso teniendo como opción final tutelar a l sistema de salud por violentar el derecho legal que ya tienen.The term sex resignation, also known as sex affirmation surgery, suggests a series of medical procedures designed to help transgender people adjust their body according to their perceived gender identity. The main objective of this study is to determine what the health care of the LGBTIQ population is like for sex reassignment surgeries. A review of the documentary literature was carried out. A variety of primary sources were used, which included scientific literature in Spanish and English. The search for information was carried out in specialized scientific databases such as, PUB MED, REDALYC, Scielo, Science Direct and Google Scholar, which allowed access to a wide range of studies and documents relevant to the review. Through this review process, relevant information was extracted from the selected studies, including findings, conclusions, research methods and important details for the analysis. The results were analyzed and presented in a characterization matrix of scientific production, and as a selection criterion the publication time from 2017 to 2023 was taken into account. Among the findings, there is little or no information about sex reassignment surgeries in the LGBTIQ+ community, however there is a lot of literature about their perception of the provision of health services as discriminatory and not very empathetic, that their rights are not taken into account or violated by health professionals and some EAPB benefit management companies, despite all the existing regulations in the world. Conclusion: In this review it is concluded that the LGBTIQ+ population, is aware of the guarantees, right and health care by its EAPB, for the performance of sex change surgery and the necessary procedures to request it, it is really the existing barriers that do not allow in most cases to reach the end of the process having as a final option to protect the health system for violating the legal right they already have.Lista de tablas 11 -- Introducción 12 -- Capítulo I 13 -- Planteamiento del problema 13 -- Pregunta Problema 16 -- Justificación 17 -- Objetivos 20 -- Objetivo general 20 -- Objetivos específicos 20 -- Capitulo II: Teorías relevantes 21 -- Antecedentes 21 -- Marco Teórico 23 -- Antecedentes históricos comunidad LGBTIQ+ en Colombia 23 -- Reasignación de sexo o cirugía de reafirmación de sexo 24 -- Criterios, Requisitos y Beneficios para acceder a la cirugía de reasignación de sexo 26 -- Situación en la reasignación de sexo en Colombia 29 -- Ley de identidad de género en Colombia 29 -- Estrategias de ayuda a la comunidad LGBTIQ+ 31 -- Marco normativo en Cirugías de reasignación de sexo 33 -- Capítulo III: Metodología de la investigación 35 -- Tipo de estudio 35 -- Muestra 35 Criterios de inclusión 35 -- Criterios de exclusión 36 -- Técnica para la recolección de la información 36 -- Resultados 38 -- Caracterización de la Producción Científica 38 -- Discusión de Resultados 45 -- Conclusiones 50 -- Referencias 51Administrador(a) de Servicios de SaludPregrad
Comparative analysis of psychophysiological responses in fibromyalgia patients: evaluating neuromodulation alone, neuromodulation combined with virtual reality, and exercise interventions.
No full textBackground and Objectives: Fibromyalgia, a chronic condition, manifests as widespread musculoskeletal pain, fatigue, sleep disturbances, autonomic and cognitive dysfunction, hypersensitivity to stimuli, and various somatic and psychiatric symptoms. This study, a controlled and randomized experiment, aimed to evaluate and compare the immediate effects of different treatments on fibromyalgia patients. Materials and Methods: The treatments included the EXOPULSE Mollii suit, a combination of the EXOPULSE Mollii suit with a virtual reality (VR) protocol, and a physical exercise regimen. A cohort of 89 female fibromyalgia patients was randomly assigned to one of four groups: Control (n = 20), Suit only (n = 22), Suit combined with VR (n = 21), and Exercise (n = 26). Results: This study found notable differences across the groups in several key parameters. In the Control group, significant changes were observed in Forced Expiratory Volume (FEV 1/FEV 6), the Numeric Rating Scale (NRS) for pain, Pressure Pain Threshold (PPT) at the epicondyle, cortical arousal levels, the 10 m up-and-go test, and in all measured variables related to temperature and muscle oxygenation. For the group using the suit alone, there were significant differences noted in the NRS, the chair stand test, palm temperature, and all muscle oxygenation parameters. The Suit + VR group showed significant changes in the NRS, PPT at the knee, handgrip strength test, the 10 m up-and-go test, one-leg balance test with the right leg, muscle oxygen saturation (SmO2), deoxygenated hemoglobin (HHb), and oxygenated hemoglobin (O2Hb). Finally, the Exercise group exhibited significant differences in FEV 1/FEV 6, chest perimeter difference, NRS, PPT at both the epicondyle and knee, cortical arousal, the chair stand test, the 10-m up-and-go test, and in SmO2, HHb, and O2Hb levels. Conclusions: combining neuromodulation with VR and targeted exercise regimens can effectively alleviate fibromyalgia symptoms, offering promising avenues for non-pharmacological management
Semana de la comunicación 2021-2
No full textEntre el 22 y el 26 de Noviembre de 2021, el programa de Comunicación Social y Medios Digitales llevó a cabo la Semana de la Comunicación, un evento que marcó el escenario para la exhibición de los proyectos más destacados desarrollados durante el primer semestre de dicho año, congregando a los estudiantes con el propósito de presentar los frutos de sus esfuerzos académicos.
Durante esta jornada, se extiende una cordial invitación a toda la comunidad académica de Unicosta para sumarse a las variadas actividades programadas. A lo largo de este período, las tres esferas de conocimiento que convergen en el programa académico dejaron patente el influyente rol del comunicador en diversos ámbitos y situacione
Effect of incorporation of recycled polypropylene plastic on mechanical properties of concrete
No full textThe use of recyclable materials in construction has become a key factor for cost reduction, the improvement of some mechanical conditions in materials, and, at the same time, has represented a major contribution to the solution of environmental problems related to pollution generated by solid waste. Polypropylene plastic has undoubtedly been one of the most studied materials to be used as a substitute for the aggregates of concrete mixtures. The main objective of this study is to analyze in a general way the impact of the addition of this material on the compression and flexion resistance of manufactured concrete samples, and in turn, to be able to verify the feasibility of adding this residue and to be used in the construction of non-structural concrete elements. To verify the hypothesis raised, mixtures with partial PP substitution were formulated in coarse and fine aggregates in a range between 20% and 70%, and these samples were subjected to compressive and flexural strength tests to assess the behavior of concrete according to the degree of substitution of the aggregate. After finishing the study, it was found that the addition of PP significantly affects the compressive strength of concrete, reducing it up to 70% in some cases, which generates a great limitation for the use of this material as a substitute in concrete mixtures used to perform structural functions. However, the flexion strength of these specimens with PP replacement shows a rather favorable behavior where it is appreciated that the resistance remains at the same level as a normal concrete sample, which would favor the application of PP replacement in the construction of non-structural elements subjected to bending stress such as pedestrian trails, urban furniture and flooring