Resumo No Brasil, construções em madeira do tipo light woodframe possuem envelopamento estrutural do painel dependente do uso de chapas de OSB (Oriented Strand Board), o que implica em uma dificuldade em seu acesso por parte da população. Para ampliar a aplicação do sistema, uma possibilidade consiste em um projeto não atrelado aos monopólios de componentes construtivos. Uma possibilidade é a substituição da camada de envelopamento estrutural dos painéis por tábuas de madeira serrada convencional. Como objetivo esta pesquisa analisa a viabilidade de utilização e o comportamento de painéis de madeira serrada com envelopamento em tábuas de pinus quando solicitados a esforços horizontais, utilizando modelo numérico de simulações em software. O trabalho estuda cinco diferentes tipologias de painéis: um modelo digital de calibração baseado em experimento ensaiado em laboratório; quatro modelos de diferentes configurações, comparando entre si o desempenho estrutural de cada um com dados publicados na literatura. A modelagem digital utilizou dados experimentais já obtidos em trabalhos anteriores. Dos cinco tipos estudados quanto à tensão-deformação, apenas o Modelo 05 não se mostrou viável pela alta concentração de tensão observada nos conectores. Os demais modelos se mostraram adequados aos critérios preconizados por normas e documentos técnicos referenciados. Brasil Oriented Board, Board , Board) população sistema construtivos convencional horizontais software laboratório configurações literatura anteriores tensãodeformação, tensãodeformação deformação, deformação tensão-deformação 0 conectores referenciados

Abstract In Brazil, light woodframe buildings rely on the use of OSB (Oriented Strand Board), what implies a difficulty in its access by part of the population. To increase the applicability of the system one proposition consists in a woodframe project that is not bound by the monopoly over constructive components. A possible way consists in the substitution of the coating of the panels with standard Pinus boards. The objective of this research is therefore to analyze the viability and the behavior of wood panels with Pinus board coating when submitted to horizontal loads, utilizing as method digital simulations. This paper lists five different panel topologies, to calibrate it: one digital model of a previous lab experiment; four panels with different configurations, comparing them between themselves and with the literature in regards of structural performance. The utilized method was of the digital simulation with previous laboratory data calibration. Among the five types studied, only Model 05 exhibited high stress concentrations at connectors, rendering it unviable. The other models meet the criteria of referenced standards and technical documents. Brazil Oriented Board, Board , Board) population components boards loads simulations topologies experiment configurations performance calibration studied 0 connectors unviable documents

Resumen: La influencia del efecto tamaño en las propiedades mecánicas del hormigón es una interrogante estudiada hace varias décadas, sin embargo, las investigaciones no permiten tener una idea clara de cómo este fenómeno afecta en las propiedades mecánicas de hormigones reforzados con fibras. La presente investigación describe la influencia del efecto tamaño en el comportamiento a flexión de hormigón reforzado con fibras de polipropileno. Para el análisis se diseñó hormigón simple reforzado con macro fibras sintéticas de polipropileno (HRFP) con 3 y 6 kg/m3 de fibras. Se elaboraron probetas prismáticas tipo vigas con tres tamaños diferente 100x100x350 mm, 100x200x650 mm y 100x300x950 mm, mismas que se ensayaron a flexión en 4 puntos. Se realizaron gráficas esfuerzo vs deflexión y se calculó el coeficiente de orientación en el plano de fractura. Los resultados indican que tanto la resistencia máxima alcanzada en el límite de proporcionalidad como las resistencias residuales post fisuración disminuyen al aumentar el tamaño de la probeta, demostrando la influencia del efecto tamaño.

Abstract: The influence of the size effect on the mechanical properties of concrete is a question studied several decades ago, however, research does not allow us to have a clear idea of how this phenomenon affects the mechanical properties of fiber-reinforced concrete. The present investigation describes the influence of the size effect on the flexural behavior of concrete reinforced with polypropylene fibers. For the analysis, simple concrete reinforced with macro synthetic polypropylene fibers (HRFP) with 3 and 6 kg/m3 of fibers was designed. Prismatic beam-type specimens were made with three different sizes: 100x100x350 mm, 100x200x650 mm and 100x300x950 mm, which were tested in 4-point bending. Stress vs. deflection graphs were made and the orientation coefficient in the fracture plane was calculated. The results indicate that both the maximum resistance reached at the limit of proportionality and the post-cracking residual resistance decrease with increasing specimen size, demonstrating the influence of the size effect.

Resumen:El presente estudio analiza los principales factores que tienen influencia en el consumo de agua potable, así como los patrones de consumo horario del recurso hídrico en zonas residenciales de la parroquia El Rosario. Se aplicó un estudio de caracterización urbanística por medio de fichas técnicas y análisis estadístico que denotan 3 estratificaciones en el sector (B, C y D). Se aplicaron encuestas para conocer factores que inciden en el consumo de agua potable y se realizó el registro horario de lecturas de 219 medidores de agua durante 24 horas los 7 días de la semana. El consumo de agua potable registrado presenta incrementos que tienen dependencia a factores como el número de usuarios que disponen del servicio, tipo de residencia, unidades sanitarias en uso y otras características externas. Se obtuvieron curvas de consumo horarias para cada red de distribución y los coeficientes de variación de consumo horario máximos y mínimos. Los caudales máximos ocurren a las 13h00 con 94.76 l/h y a las 19h00 con 73.46 l/h, el coeficiente máximo de variación de consumo horario (Kh_max) es de 3.44, valor que sobrepasa lo establecido en la normativa nacional vigente CPE INEN 5 (1992); los valores de los coeficientes máximos de cada barrio se presentan mediante digitalización georreferenciada.

Abstract:This study analyzes the main factors that influence drinking water consumption, as well as the hourly water consumption patterns in residential areas of El Rosario parish. A study of urban characterization was applied by means of technical data sheets and statistical analysis that showed 3 stratifications in the sector (B, C and D). Surveys were conducted to determine the factors that affect drinking water consumption, and an hourly record was made of readings of 219 water meters 24 hours a day, 7 days a week. The consumption of drinking water recorded showed increases that depend on factors such as the number of users who have the service, type of residence, sanitary units in use and other external characteristics. Hourly consumption curves were obtained for each distribution network and the coefficients of variation of maximum and minimum hourly consumption. The maximum flows occur at 13h00 with 94.76 l/h and at 19h00 with 73.46 l/h, the maximum coefficient of variation of hourly consumption (Kh_max) is 3.44, a value that exceeds that established in the current national regulation CPE INEN 5 (1992); the values of the maximum coefficients of each neighborhood are presented through georeferenced digitalization.

Abstract The shear behavior of reinforced concrete beams, particularly those with steel fiber reinforced concrete (SFRC), remains a challenge for the scientific community, as it involves complex material behavior. However, the advancement of the digital image correlation (DIC) technique has facilitated the acquisition of essential experimental data for modeling the mechanical behavior of SFRC, contributing to a better understanding of the problem and the shear resistance mechanisms. In this study, eight reinforced concrete beams, with and without steel fibers, were evaluated using the DIC technique to quantify the resistance mechanisms, with a focus on models that may represent the contribution of the fibers. The results revealed that the predominant mechanisms in shear behavior were aggregate interlock and the steel fibers. This study also represents a step towards a more rational understanding of shear behavior, while identifying gaps that require further investigation, such as the influence of fibers on all resistance mechanisms and the formulation of the contribution of steel fibers. beams SFRC , (SFRC) community However (DIC investigation (SFRC

Resumo O entendimento do comportamento à força cortante de vigas de concreto armado, especialmente as vigas de concreto reforçado com fibras de aço (CRFA), ainda é um desafio para a comunidade científica, devido à complexidade do comportamento dos materiais. No entanto, a evolução da técnica de correlação por imagem digital (CID) permitiu a obtenção de dados experimentais fundamentais para a modelagem do comportamento mecânico do CRFA, contribuindo para um melhor entendimento do problema e dos mecanismos resistentes à força cortante. Neste sentido, o presente estudo avalia oito vigas de concreto armado, com e sem fibras de aço, utilizando a técnica CID para quantificar os mecanismos resistentes, com foco nos modelos que podem representar a contribuição das fibras. Os resultados revelaram que os mecanismos preponderantes no comportamento à força cortante foram o engrenamento dos agregados e as fibras de aço. Este estudo representa um avanço no entendimento mais racional do comportamento à força cortante, assim como identifica lacunas que requerem estudos mais aprofundados, como a influência das fibras em todos os mecanismos resistentes e a formulação da contribuição das fibras de aço. armado CRFA , (CRFA) científica materiais entanto (CID sentido aprofundados (CRFA

RESUMEN Los Centennials presentan más disposición para comprar en redes sociales, aunque son evidentes las diferencias sobre el uso y consumo de contenidos e información de Instagram entre los miembros de esta generación, lo que sugiere que su comportamiento de compra también puede diferir Por ello en esta investigación se propone clasificar el comportamiento de compra de los Z en esta red social basados en su actitud hacia la publicidad y el uso de la aplicación. Se abordó un enfoque cuantitativo a través de un análisis factorial confirmatorio seguido de una prueba de conformación de clúster jerárquicos en una muestra de 494 participantes entre los 18 a 29 años de ciudades y municipios colombianos y de diversos niveles socioeconómicos. Se encontró que las dimensiones de uso, acciones de compra, consumo de contenidos, interés social, agrado por la publicidad, atencionalidad a la publicidad y seguridad están presentes en el comportamiento de los usuarios en la red social. Estas variables se usaron para exponer tres tipologías de comportamiento concluyendo que existen diversos comportamientos de compra y actitud hacia la publicidad desplegada en el medio digital.

RESUMO Os Centennials estão mais dispostos a comprar nas redes sociais, embora existam diferenças evidentes na utilização e consumo do Instagram entre os membros desta geração, o que sugere que o seu comportamento de compra também pode ser diferente. Portanto, nesta pesquisa, propõe-se classificar o comportamento de compra do Z no Instagram com base na sua atitude em relação à publicidade e ao uso do aplicativo. Abordou-se uma abordagem quantitativa por meio de análise fatorial confirmatória seguida de teste hierárquico de formação de cluster em uma amostra de 494 participantes entre l8 e 29 anos das principais cidades intermediárias e pequenas do país e de diversos níveis socioeconómicos. Verificou-se que as dimensões uso, ações de compra, consumo de conteúdo, interesse social, gosto pela publicidade, atenção à publicidade e segurança estão presentes no comportamento dos usuários na rede social. Estas variáveis foram utilizadas para expor três tipologias de comportamento, concluindo que existem diversos comportamentos de compra e atitudes face à publicidade veiculada no meio digital.

ABSTRACT Centennials are more willing to buy on social networks, although not all of them have the same behavior differences observed by inner members of this generation, which suggests that their buying behavior may also differ For this reason, in this research it was proposed to classify the purchasing behavior of generation Z in the social network Instagram based on their attitude towards advertising and the use of the application. A quantitative approach was used through a confirmatory factor analysis followed by a hierarchical cluster confirmation test in a sample of 494 participants from 18 to 29 years old, residents in main, intermediate and small cities in the country and of various socioeconomic levels. It was found that the dimensions of use, purchase actions, content consumption, social interest, liking for advertising, attention to advertising and security are present in the behavior of users on the social network. These variables were used to expose three types of behavior, concluding that there are different purchasing behaviors and attitudes towards advertising displayed in digital media.

Resumen: Este artículo proporciona un análisis exhaustivo de los factores que impactan las intenciones, los comportamientos, las innovaciones y el sentido de autoeficacia empresarial en el ecosistema empresarial digital en el Reino de Arabia Saudita. Al ilustrar los roles del ecosistema, la intención empresarial, la innovación y la educación, el estudio aspira proporcionar información sobre las dinámicas distintivas del emprendimiento digital en este entorno geográfico. El estudio utiliza tanto entrevistas cualitativas con expertos en la materia como análisis estadístico cuantitativo de las respuestas de la encuesta. El ecosistema empresarial digital saudita se explora cualitativamente a través de 15 entrevistas con expertos de la industria y cuantitativamente con 248 respuestas a encuestas que permiten probar hipótesis utilizando modelos de ecuaciones estructurales. Los datos cuantitativos de este estudio se analizaron mediante PLS-SEM. Los resultados enfatizan los roles mediadores de la ambición empresarial y la innovación, destacando la importancia clave del ecosistema empresarial digital para impulsar el comportamiento empresarial. La educación empresarial surge como un elemento poderoso que actúa como moderador en la configuración del éxito empresarial. La investigación proporciona información útil sobre las características únicas del emprendimiento digital en Arabia Saudita.

Abstract: This paper provides a comprehensive analysis of the factors impacting entrepreneurial intentions, behaviors, innovations, and the sense of self-efficacy in the digital entrepreneurial ecosystem in the Kingdom of Saudi Arabia. By illuminating the roles of the ecosystem, entrepreneurial intention, innovation, and education, the study aspires to provide insights into distinctive dynamics of digital entrepreneurship in this geographical setting. The study employs both qualitative in-depth interviews with subject matter experts and quantitative statistical analysis of survey responses. The Saudi digital entrepreneurial ecosystem is explored qualitatively through 15 in-depth interviews with industry experts and quantitatively with 248 survey responses that allow for hypothesis testing using structural equation modeling. The quantitative data in this study were analyzed using PLS-SEM. The results emphasize the mediating roles of entrepreneurial ambition and innovation, highlighting the key significance of the digital entrepreneurial ecosystem in driving entrepreneurial behavior. Entrepreneurial education is emerging as a powerful element, acting as a moderator in shaping entrepreneurial success. The research provides useful information about the unique characteristics of digital entrepreneurship in Saudi Arabia.

Resumen: Esta investigación analiza la relación entre comportamiento de consumo sostenible con la percepción, las prácticas y los atributos percibidos en los productos y los fabricantes en torno al consumo responsable en la generación Z. Para esto se hizo un estudio descriptivo, con enfoque cuantitativo. Se aplicó una encuesta en formato digital a 903 adultos nacidos a partir de 1995 en la ciudad de Bogotá. El análisis estadístico se realizó mediante un análisis factorial confirmatorio para identificar si las variables se agrupan en los constructos propuestos, seguido se realizó un modelo causal a partir de un análisis de ecuaciones estructurales, con la metodología de bootstraping con el fin de validar las hipótesis propuestas. Los resultados comprueban la existencia de los factores propuestos y se identificó que los hábitos de consumo responsable, la actitud hacia el consumo responsable y los atributos del producto inciden en el comportamiento de consumo sostenible, sin embargo, los atributos percibidos del fabricante no tienen una relación directa con este, aunque cuando los atributos del fabricante son mediados por los atributos del producto existe incidencia. Estos hallazgos aportan al conocimiento científico ya que la literatura actual no ha analizado la relación entre el fabricante con producción responsable y los atributos de productos de consumo responsable percibidos por el consumidor. Por tal razón, los fabricantes deben mejorar sus esfuerzos en comunicar y llevar al mercado productos amigables con el medio ambiente.

Abstract: This research analyzes the relationship between sustainable consumption behavior with perception, practices and perceived attributes in products and manufacturers around responsible consumption in generation Z. For this a descriptive study was made, quantitatively. A digital survey was carried out on 903 adults born in Bogotá since 1995. The statistical analysis was performed using a confirmatory factor analysis to identify if the variables are grouped in the proposed constructs, followed by a causal model based on an analysis of structural equations, with the bootstraping methodology in order to validate the proposed hypotheses. The results prove the existence of the proposed factors and it was identified that responsible consumption habits, attitude towards responsible consumption and product attributes affect sustainable consumption behavior, However, the perceived attributes of the manufacturer do not have a direct relationship with it, although when the attributes of the manufacturer are mediated by the attributes of the product there is incidence. These findings contribute to scientific knowledge since the current literature has not analyzed the relationship between the manufacturer with responsible production and the attributes of responsible consumer products perceived by the consumer. For this reason, manufacturers must improve their efforts to communicate and bring environmentally friendly products to market.

Abstract: This study aims to identify and analyze the main research streams on digital safety and online privacy related to higher education students. Students are at risk of cybercrime, including online harassment, identity theft, and exposure to inappropriate content. A systematic literature review is conducted on digital security, cybersecurity, Internet security, online safety, and use of digital technologies. The results show that publications on digital security for higher education students have increased consistently during the last two decades. The main research streams are: digital risk and student perspectives, digital children, digital teenagers, online harassment, and digital behavior. In conclusion, this study provides a wide assessment on digital security for university students and highlights the importance of future research on improving awareness and safety on digital environments for teenagers.

Resumen: Este estudio tiene como objetivo identificar y analizar las principales corrientes de investigación en seguridad digital y privacidad en línea para estudiantes de educación superior. Los estudiantes están en riesgo de ser víctimas de ciberdelitos, como el acoso en línea, el robo de identidad y la exposición a contenido inapropiado. Se realiza una revisión sistemática de la literatura sobre seguridad digital, ciberseguridad, seguridad en Internet y uso de tecnologías digitales. Los resultados muestran que la producción científica sobre seguridad digital en estudiantes de educación superior ha experimentado un crecimiento sostenido durante las últimas dos décadas. Las corrientes de investigación más destacadas son: riesgo digital y perspectivas estudiantiles, digital children, jóvenes digitales, ciberacoso y comportamiento digital. En conclusión, se proporciona una visión amplia sobre la seguridad digital en estudiantes universitarios y se destaca la importancia de futuras investigaciones para mejorar la conciencia y protección de los jóvenes en el entorno digital.

ABSTRACT: In Brazil, certain studies have been performed on the exposure to global occupational noise levels when mechanized equipment is used in coffee-growing. However, these did not indicate the behavior within a frequency spectrum (Hz) by octave bands. The objective of this study was to assess the sound pressure levels of the brush, mower, and atomizer attached to a tractor under actual operating conditions by using 1/1 octave band filters. Quantitative assessments were performed with the mower, brush, and atomizer attached to the MF 275 tractor under two conditions: operative and static. The noise levels obtained under actual operating conditions were determined using a DOS 1000 noise dosimeter and an octave band filter. The static condition assessments were performed inside and outside the coffee plantation using a Hikari HDB 900 digital sound level meter. The NR 15 and NHO 01 standards were used to analyze the data. Under operative and static conditions, the tractor units showed noise levels above the exposure limit of 85 dB (A) for an 8h working day. The assessment of the frequency spectrum revealed the highest noise levels to be in the 125-1000 Hz range. ABSTRACT Brazil coffeegrowing. coffeegrowing growing. growing coffee-growing However (Hz bands brush mower 11 1 1/ filters 27 100 filter 90 meter 0 data 8 A (A h day 1251000 125 125-100 range 2 10 9 125100 12 125-10 12510 125-1 1251 125-

RESUMO: No Brasil, alguns estudos têm sido realizados sobre exposição a níveis de ruído ocupacional global na utilização de conjuntos mecanizados na cafeicultura, não apontando o comportamento dentro de um espectro de frequência (Hz) por bandas de oitava. O objetivo do presente estudo foi avaliar o nível de pressão sonora dos implementos trincha, roçadora e pulverizador acoplados ao trator em condições reais de operação por filtros de banda de 1/1 oitava. As avaliações quantitativas foram realizadas com os implementos roçadora, trincha e pulverizador acoplados ao trator MF 275 em duas condições: operação e estático. Os níveis de ruído obtidos em condições reais de operação foram determinados com dosímetro de ruído DOS 1000 e filtro de banda de oitava. Já as avaliações em condição estática dentro e fora da lavoura cafeeira ocorreram por meio da utilização de sonômetro digital Hikari HDB 900. Foram utilizadas as normativas NR 15 e NHO 01 para análise dos dados. Em condições de operação e estático, todos os conjuntos tratorizados apresentaram níveis de ruído superiores ao limite de exposição de 85 dB (A) para uma jornada de trabalho de oito horas. A avaliação do espectro de frequência apontou que os maiores níveis de ruído foram encontrados no intervalo de 125 a 1000 Hz. RESUMO Brasil cafeicultura Hz (Hz oitava 11 1 1/ 27 estático 100 900 0 dados 8 (A horas 12 2 10 90 9

Abstract: Since ancient times, timber has been used as a natural renewable material in construction. Currently in Chile, timber buildings are constructed using platform frame walls. In Ecuador this structural system has not been studied, and it is important to do so in order to promote a greater development in the national construction industry. This paper analyzes the behavior of a timber wall under cyclic and monotonic loads, without vertical load according to ASTM E2126 and ASTM E564 respectively. The wall is made of locally produced eucalyptus timber pieces, covered on both sides with Oriented Strand Board (OSB) panels. The results of the monotonic test showed the maximum capacity of the wall. In the cyclic test, the effective stiffness, effective damping and Story Drift Ratio (SDR) were obtained. It is shown that the specimen has high strength and stiffness, high energy dissipation capacity and is at an immediate occupancy performance level.

Resumen: La madera desde la antigüedad ha sido utilizada como un material natural renovable en la construcción. En la actualidad en Chile, se construyen edificaciones de madera usando muros marco plataforma. En el Ecuador este sistema estructural no ha sido estudiado, siendo importante hacerlo para propiciar un mayor desarrollo en la industria de la construcción nacional. En el presente documento se analiza el comportamiento de un muro de madera ante cargas cíclicas y monotónicas, sin carga vertical de acuerdo con las normativas ASTM E2126 y ASTM E564 respectivamente. El muro está conformado por piezas de madera de eucalipto producidas localmente, recubierto en ambas caras con tableros de virutas orientadas (OSB). Como resultado del ensayo monotónico se obtuvo la capacidad máxima del muro, y del ensayo cíclico la rigidez efectiva, amortiguamiento efectivo y la relación de desplazamiento por piso (SDR). Se demuestra que la probeta tiene una alta resistencia y rigidez, gran capacidad de disipar energía y se encuentra en un nivel de desempeño de ocupación inmediata.

Resumen: Este artículo busca caracterizar el comportamiento de las publicaciones periódicas culturales en Cuba, entre 1990 y 2010, a la luz de la crisis que trajo consigo la disolución de la Unión Soviética. Partiendo del principio de que dichas publicaciones reflejan, en todos los aspectos que garantizan su existencia, las dinámicas, tendencias y fenómenos del acontecer socio-histórico-cultural, el trabajo explora y analiza la secuencia de cancelaciones, cierres, intermitencias y estrategias de resiliencia usadas por las revistas, tabloides, boletines y anuarios culturales en correlación con aspectos de orden económico, logístico, ideológico, social y estético. Basado en el examen de fuentes primarias y documentales, el estudio revela los procesos que llevaron a la diversificación de fórmulas y alternativas de gestión, la implementación de soluciones locales sobre las estatales, la emergencia de grupos literarios ajenos a instituciones oficiales, o el empleo del medio digital como nuevo soporte.

Abstract: This article pursues to characterize the behavior of cultural periodicals in Cuba, between 1990 and 2010, in the light of the crisis brought about by the dissolution of the Soviet Union. Starting from the principle that these publications reflect, in all aspects that guarantee their existence, the dynamics, trends and phenomena of socio-historical-cultural events, the paper explores and analyzes the sequence of cancellations, closures, intermittencies and resilience strategies used by magazines, tabloids, bulletins and periodicals in correlation with economic, logistic, ideological, social, and aesthetic aspects. Based on the examination of primary and documentary sources, the study reveals the processes that led to the diversification of management formulas and work alternatives, the implementation of local solutions over state ones, the emergence of literary groups outside official institutions, or the use of digital media as a new support.

Prior research reveals a persistent lack of interest from teachers to engage in content-based collaborative teaching communities. This obscurity often results in teachers working in isolation, detrimentally affecting the implementation of indigenized innovative digital pedagogies. The current study investigates the interplay between teacher collaboration and the indigenization of secondary school mathematics pedagogy (SS-MP) via the UTAUT model. A cross-sectional study was conducted in South African rural secondary schools, aiming to examine the extent to which teacher collaboration contributes to the indigenization of SS-MP and how this relationship can be measured and assessed within the context of the UTAUT model. Stratified random sampling was used in selecting participants in the survey. Partial least squares structural equation modelling (PLS-SEM) was employed to analyze the measurement and structural models guided by five (5) hypotheses. The sample comprises one-hundred and fourteen educators. The findings revealed significance of behavioural intention (BI) and attitude (ATT) in predicting the successful indigenisation of mathematics teaching practices. User behavior (UB) reveals potential for refinement in predictive performance. Policy implications do emphasise tailoring educational technology integration policies, with reference to infrastructure and supportive conditions. For managerial level, targeted professional development initiatives as well as positive social influences are crucial. The general position though is understanding of technology acceptance in secondary school mathematics, by providing practical guidance responding to culturally settings and technology integration.

Abstract The consumption of ultra-processed foods has increased globally in recent years. The percentage of calories from these foods is directly associated with the risk of non-communicable chronic diseases. The objective is to evaluate the consumption of ultra-processed foods (UPF) among teachers during the COVID-19 pandemic. This is a cross-sectional study conducted in 2020 in Minas Gerais via digital form. Prevalence ratios between UPF consumption, demographic characteristics, working conditions, lifestyle and health were estimated using Poisson regression. Of the 15,641 teachers, the UPF increase was 27.6%, 28.1% women and 25.6% men. There was a higher prevalence among young women (PR=2.46), without children (PR=1.15), who worked more (PR=1.22), dissatisfied at work (PR=1.25), sedentary (PR=1.25 =1.25), with insomnia (PR=1.57) and overweight (PR=1.12). As for men, there was a higher prevalence among those who were young (PR=1.91), dissatisfied at work (PR=1.40), sedentary (PR=1.17) and insomnia (PR=78). Therefore, it is concluded that there was an increase in UPF consumption.

Resumen El consumo de alimentos ultraprocesados ha aumentado a nivel mundial en los últimos años. El porcentaje de calorías de estos alimentos está directamente asociado con el riesgo de enfermedades crónicas no transmisibles. El objetivo es evaluar el consumo de alimentos ultraprocesados (UPF) entre docentes durante la pandemia de COVID-19. Se trata de un estudio transversal realizado en 2020 en Minas Gerais a través de formulario digital. Los índices de prevalencia entre el consumo de UPF, las características demográficas, las condiciones de trabajo, el estilo de vida y la salud se estimaron mediante regresión de Poisson. De los 15.641 docentes, el incremento de la UPF fue del 27,6%, el 28,1% mujeres y el 25,6% hombres. Hubo mayor prevalencia entre las mujeres jóvenes (RP=2,46), sin hijos (RP=1,15), que trabajaban más (RP=1,22), insatisfechas en el trabajo (RP=1,25), sedentarias (RP=1,25=1,25), con insomnio (RP=1,57) y sobrepeso (RP=1,12). En cuanto a los hombres, hubo mayor prevalencia entre los que eran jóvenes (RP=1,91), insatisfechos en el trabajo (RP=1,40), sedentarios (RP=1,17) e insomnes (RP=78). Por tanto, se concluye que hubo un aumento en el consumo de UPF.

Resumen En la actualidad, a nivel global, se observan bajos niveles de cumplimiento en lo que respecta a la realización de actividad física, lo que conduce a un aumento significativo en la adopción de comportamientos sedentarios durante largos períodos de tiempo. Esta tendencia representa un importante problema de salud pública que afecta al 60 % de la población mundial. En este contexto, la Organización Mundial de la Salud ha propuesto un conjunto de intervenciones técnicas, enmarcadas en los Objetivos de Desarrollo Sostenible), con el objetivo de fomentar la práctica de actividad física. Estas intervenciones incluyen medidas como la promoción de la conservación ambiental, la estimulación de la innovación y el uso de soluciones digitales. Objetivo: diseñar y validar los mensajes con modalidad persuasiva en mujeres que participan en una intervención en actividad física en una universidad colombiana. Metodología: validez de contenido de mensajes con modalidad persuasiva. Inicialmente se diseñaron los contenidos de acuerdo con los procesos de cambio conductual del modelo transteórico, después se realizó la validez de contenido a través de expertos y prueba estadística. Y, por último, se enviaron los mensajes a mujeres que participaron de una intervención en el marco de “AcTICvate en casa” durante el año 2021 en la ciudad de Manizales. Resultados: se obtienen 24 mensajes validados en tres líneas, relacionados con teorías del comportamiento para promover la práctica de actividad física. Conclusión: el diseño de los mensajes y la validación del índice de contenido a través de expertos soportan una relación positiva para el cambio de comportamiento sedentario en mujeres.

Abstract Currently, at a global level, we observe low levels of compliance regarding physical activity, leading to a significant increase in the adoption of sedentary behaviors for extended periods of time. This trend represents a significant public health issue affecting 60% of the world’s population. In this context, the World Health Organization (WHO) has proposed a set of technical interventions framed within the Sustainable Development Goals (SDGs) aimed at promoting physical activity. These interventions encompass measures such as environmental conservation promotion, innovation stimulation, and the utilization of digital solutions. Objective: Design and validate messages with persuasive modality in women participating in physical activity intervention at a Colombian University. Methodology: Message content validity with persuasive modality. Firstly, the content was designed according to the behavioral change processes of the Transtheoretical Model. Afterward, the content was validated by experts. Finally, the messages were sent to women who were part of an intervention in the framework of “AcTICvate en casa” during the year 2021 in the city of Manizales. Results: You obtain 24 validated messages in three lines related to behavioral theories for promoting physical activity. Conclusions: The message design and the validation of the table of contents through experts, support a positive relationship for changing sedentary behavior in women.

Resumo Atualmente, a nível global, observam-se baixos níveis de cumprimento no que diz respeito à prática de atividade física, o que leva a um aumento significativo na adoção de comportamentos sedentários por longos períodos de tempo. Essa tendência representa um importante problema de saúde pública que afeta 60% da população mundial. Nesse contexto, a Organização Mundial da Saúde (OMS) propôs um conjunto de intervenções técnicas, inseridas nos Objetivos de Desenvolvimento Sustentável (ODS), com o objetivo de promover a prática de atividade física. Essas intervenções incluem medidas como a promoção da conservação ambiental, o estímulo à inovação e o uso de soluções digitais. Objetivo: Conceber e validar mensagens com modalidade persuasiva em mulheres que participam em intervenções de atividade física numa Universidade Colombiana. Metodologia: Validade do conteúdo da mensagem com uma modalidade persuasiva. Em primeiro lugar, o conteúdo foi concebido de acordo com os processos de mudança comportamental do Modelo Transtoretical. Posteriormente, o conteúdo foi validado por peritos. Finalmente, as mensagens foram enviadas a mulheres que faziam parte de uma no âmbito da “AcTICvate en casa” durante o ano de 2021 na cidade de Manizales. Resultados: Você obtém 24 mensagens validadas em três linhas relacionadas a teorias comportamentais para promover a prática de atividade física. Conclusões: A concepção da mensagem e a validação do índice através de especialistas, apoiam uma relação positiva para a mudança do comportamento sedentário nas mulheres.

Abstract Objective: To examine if the substitution of different screen time intervals with light physical activity (LPA), moderate to vigorous physical activity (MVPA) and sleep is associated with cardiovascular indicators and inflammatory markers in children. Methods: This is a cross-sectional study developed with 186 children aged between six and 11 years old from public schools in southern Brazil. CRF was measured with the 6-minute running and walking test, following the Brazil Sports Project procedures. The percentage of fat was evaluated through DXA. LPA and MVPA were measured using accelerometers. Sleep and screen time were assessed by questionnaires answered by parents. Leptin and C-reactive protein were measured by fasting blood collection. Systolic and diastolic blood pressure were determined through a digital sphygmomanometer. Isotemporal substitution models were used for statistical analysis. Results: Replacing 1 h of screen time with MVPA was associated with lower BMI, systolic and diastolic blood pressure, fat percentage, leptin, and C-reactive protein. When screen time was substituted for sleep time, lower waist circumference was observed. Regarding the substitution of 1 h of screen time with LPA, significant values were found only for leptin. Conclusion: The replacement of screen time with physical activities of different intensities and sleep time was associated with benefits in cardiovascular indicators and inflammatory markers in childhood. Objective , (LPA) (MVPA Methods crosssectional cross sectional 18 6minute minute 6 test procedures DXA accelerometers parents Creactive C reactive collection sphygmomanometer analysis Results BMI leptin observed Conclusion childhood (LPA