Gas chromatography coupled to mass spectrometry (GC-MS) has been widely used, and along with other methodologies such as derivatization, is a powerful tool to analyze phytocompounds, including cuticular wax components. The loss of structural information upon fragmentation of waxes makes it difficult to interpret and identify the GC-MS mass spectra of these compounds with the traditional methods, as digital libraries. Therefore, as a new complementary alternative to traditional methods of identifying aliphatic acyclic lipids based on mass spectra, we present the new software WaxAlly in this technical note. WaxAlly is a new software created based on simple algorithms, enabling the rapid recognition by the user of eight aliphatic acyclic lipid classes, including alkanes, alkenes, aldehydes, ketones, esters, and TMS derivatives of free fatty acids, primary and secondary alcohols, and their homologues with carbon chains varying between 10 and 100 carbons. Additionally, the WaxAlly software provides a section for data organization, internet comparison to NIST and PubChem databases, and academic information about mass fragmentation of acyclic lipids. The software has proven to be a very useful complementary technique in identifying plant wax lipid homologues, and new fragmentation patterns of lipid classes can be added in the future to improve the program. GCMS GC MS (GC-MS used derivatization phytocompounds components libraries Therefore note algorithms alkanes alkenes aldehydes ketones esters acids alcohols 1 carbons Additionally organization databases program

Abstract Construction projects are highly complex systems that recurrently present discrepancies between work-as-imagined and work-as-done. Digital technologies, such as photogrammetry using UAVs (drones), are promising support tools to cope with this problem. Therefore, this study aims to evaluate the procedures for developing and assessing the quality of a 3D model generated through photogrammetry from images captured by a drone, comparing it to the as-designed BIM model. Thus, a case study was carried out in a residential low-income housing construction project in Camaçari, Brazil. Compared to the as-designed BIM 3D model, the photogrammetric model presented an average dimensional deviation of -1.68%. The model also presented issues such as occlusions and deformations. The study highlights that both this deviation and the quality of the photogrammetric model can be significantly influenced by the data collection method (e.g., quantity and resolution of photos). The study's primary contribution lies in presenting the potential of UAV usage for image capture in photogrammetry model generation. workasimagined work imagined workasdone. workasdone done. done work-as-done technologies drones, drones , (drones) problem Therefore D drone asdesigned designed Thus lowincome low income Camaçari Brazil 1.68%. 168 1 68 -1.68% deformations e.g., eg e g (e.g. photos. photos . photos) studys s generation (drones 1.68% 16 6 -1.68 e.g. (e.g 1.68 -1.6 e.g 1.6 -1. 1. -1 -

Resumo Projetos de construção são sistemas altamente complexos que apresentam recorrentemente discrepâncias entre o trabalho planejado e o trabalho realizado. Tecnologias digitais, como a fotogrametria com VANTs (drones), são ferramentas de suporte promissoras nesse contexto. Assim, este estudo tem como objetivo avaliar os procedimentos de desenvolvimento e qualidade de um modelo 3D gerado por fotogrametria através de imagens capturadas por drone, comparando-o ao modelo as-designed BIM. Para isso, realizou-se um estudo de caso em uma habitação de interesse social localizada em Camaçari-BA. Comparado ao modelo BIM projetado, o modelo fotogramétrico apresentou um desvio dimensional médio de -1,68%. O modelo também apresentou inconsistências como oclusões e deformações. O estudo mostra que tanto esse desvio como a qualidade do modelo fotogramétrico obtido podem ser consideravelmente influenciados pela forma de coleta dos dados (ex. baixa quantidade e resolução das fotos). A principal contribuição do estudo é apresentar o potencial do uso do VANT para captura de imagens para geração de um modelo de fotogrametria. realizado digitais drones, drones , (drones) contexto Assim D drone comparandoo comparando asdesigned as designed isso realizouse realizou se CamaçariBA. CamaçariBA Camaçari BA. BA Camaçari-BA projetado 1,68%. 168 1 68 -1,68% deformações ex. ex (ex fotos. fotos . fotos) (drones 1,68% 16 6 -1,68 1,68 -1,6 1,6 -1, 1, -1 -

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: En este artículo buscamos comprender qué disposiciones y capacidades han permitido la intensificación, en la última década, del compromiso político de las mujeres en las nuevas derechas. Nuestra hipótesis interpretativa es que la expansión del involucramiento de las mujeres conservadoras con los temas políticos ocurre y es favorecida por una compleja articulación entre políticas de identidad, economías de afecto y emociones, esfera público-privada y tecnologías digitales de conexión. Proponemos una discusión interpretativa y especulativa, inspirada en elementos empíricos producidos en investigaciones etnográficas digitales longitudinales a través de las cuales rastreamos rasgos digitales de mujeres conservadoras de los segmentos medios de la Región Metropolitana de la Gran Vitória (ES, Brasil). Adoptamos un enfoque relacional y construccionista, considerando elementos teórico-metodológicos de la teoría del actor-red, de los estudios de los afectos y emociones, y de la lectura de la relación casa-calle propuesta por Roberto DaMatta. Resumen intensificación década derechas identidad emociones públicoprivada público privada conexión especulativa ES, ES (ES Brasil. Brasil . Brasil) construccionista teóricometodológicos teórico metodológicos actorred, actorred actor red, red actor-red casacalle casa calle DaMatta

Resumo: Neste artigo, procuramos compreender quais disposições e capacidades têm permitido a intensificação, na última década, do engajamento político de mulheres nas novas direitas. Nossa hipótese interpretativa é de que a ampliação do envolvimento de mulheres conservadoras com questões políticas se dá e é favorecida por uma complexa articulação entre políticas da identidade, economias de afeto e emoções, esfera pública-privada e tecnologias digitais de conexão. Propomos a discussão de cunho interpretativo e especulativo, inspirada por elementos empíricos produzidos em pesquisa etnográfica digital longitudinal por meio da qual temos rastreado traços digitais de mulheres conservadoras dos segmentos médios da Região Metropolitana da Grande Vitória (ES, Brasil). Adotamos uma abordagem relacional e construcionista, considerando elementos teórico-metodológicos da teoria ator-rede, dos estudos dos afetos e emoções, e da leitura da relação casa-rua proposta por Roberto DaMatta. Resumo artigo intensificação década direitas identidade emoções públicaprivada pública privada conexão especulativo ES, ES (ES Brasil. Brasil . Brasil) construcionista teóricometodológicos teórico metodológicos atorrede, atorrede ator rede, rede ator-rede casarua casa rua DaMatta

Abstract: In this article, we seek to understand which dispositions and capacities have allowed the intensification, in the last decade, of the political engagement of women in the new right-wings. Our interpretative hypothesis is that the expansion of the involvement of conservative women with political issues occurs and is favored by a complex articulation between identity policies, economies of affection and emotions, public-private sphere and digital technologies of connection. We propose an interpretative and speculative discussion, inspired by empirical elements produced in longitudinal digital ethnographic research through which we have tracked digital traits of conservative women from the middle segments of the Metropolitan Region of Greater Vitória (ES, Brazil). We adopted a relational and constructionist approach, considering theoretical-methodological elements of the actor-network theory, of the studies of affects and emotions, and the reading of the House-Street relationship proposed by Roberto DaMatta. Abstract article intensification decade rightwings. rightwings right wings. wings right-wings policies emotions publicprivate public private connection discussion ES, ES (ES Brazil. Brazil . Brazil) approach theoreticalmethodological theoretical methodological actornetwork actor network theory HouseStreet House Street DaMatta

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

Abstract By the year of two thousand and nineteen, the private medical service industry growth was concentrated in the border cities of the Sonora state due to the large number of foreign patients and around six hundred thousand Sonora residents or descendants living in the state of Arizona (López, 2019). Hermosillo stands out among the border municipalities, thanks to its internationally certified private hospital infrastructure. However, the absence of post-operative-care as well as external services promoters in Mexico and internationally, combined with a fragmented value chain, have slowed down the growth of the medical industry in the capital (López, 2019). Our society is still in the first stages of digitalization therefore a universally accepted concept of digital economy has yet to be established. There's a gap between the available tools and the implementation in order to optimize the value chain and the customer experience. The current document contextualizes the private medical service industry in Hermosillo, Sonora within the digital economy through documentary research on digital resources, in the matters of politics, economics, social and technological context. In addition, the health crisis forced the digitalization of the commercialization processes in order to accomplish established objectives, thereby positioning the medical service industry as a participant in the digital economy.

Resumen Para el año dos mil diecinueve el crecimiento de la industria médica privada se daba más en las ciudades fronterizas del estado de sonora debido a la afluencia de pacientes extranjeros y unos seiscientos mil sonorenses o descendientes radicados en el estado de Arizona (López, 2019). Hermosillo destaca de los municipios fronterizos, gracias a la infraestructura privada hospitalaria certificada internacionalmente. Sin embargo, la ausencia de servicio postoperatorio al igual que agentes externos promotores de los servicios en el extranjero como en la república mexicana y una desconexión en la cadena de valor, han frenado el crecimiento de la industria médica en la capital (López, 2019). El concepto de economía digital no cuenta con una definición ampliamente aceptada, debido a que la sociedad se encuentra en las primeras etapas de digitalización. Existe una brecha entre las herramientas y su instrumentación para eficientar la cadena de valor y la experiencia del cliente. El presente documento contextualiza la industria privada de servicios médicos de Hermosillo, Sonora en la economía digital mediante una investigación documental de recursos digitales, esto en materia política, económica, social y tecnológica. Aunado a lo anterior la crisis sanitaria forzó a la digitalización de los procesos comerciales para lograr los objetivos planteados, por lo que la industria médica se convirtió en un actor de la economía digital.

RESUMEN En el contexto actual, la transformación digital se ha convertido en un factor fundamental para el cambio de la matriz productiva en Ecuador. Esto se debe a que el mundo está siendo cada vez más digital y las empresas necesitan adaptarse a esta nueva realidad para seguir siendo competitivas en el mercado nacional e internacional. Sin embargo, a pesar de los esfuerzos del gobierno ecuatoriano por impulsar la transformación digital, todavía existen obstáculos que limitan su implementación de manera eficiente y efectiva. Uno de ellos es el insuficiente conocimiento sobre el tema y sobre sus beneficios para la práctica social. Muchas empresas todavía no han adoptado las tecnologías digitales en sus procesos y actividades. Por otro lado, existen barreras como la falta de acceso a internet en algunas zonas rurales y la falta de capacitación y formación en habilidades digitales. El objetivo de este estudio es ofrecer un análisis de los niveles de interdependencia intersectorial en el contexto de la matriz productiva de Ecuador, identificando los principales desafíos, fortalezas y oportunidades. De esta manera se podrán proponer recomendaciones para la integración efectiva con la transformación digital. La metodología consistió en revisar la literatura sobre la transformación digital y su integración a la matriz productiva de Ecuador. También se recopiló información de estudios y datos estadísticos sobre la adopción de tecnologías digitales en el país.

ABSTRACT In the current context, digital transformation has become a key factor for changing the productive matrix in Ecuador. This is because the world is becoming increasingly digital and companies need to adapt to this new reality to remain competitive in the domestic and international markets. However, despite the Ecuadorian government's efforts to promote digital transformation, there are still obstacles that limit its efficient and effective implementation. One of those obstacles is the insufficient knowledge about the subject and about its benefits for social practice. Many companies have not yet adopted digital technologies in their processes and activities. On the other hand, there are barriers such as the lack of access to the internet in some rural areas and the lack of training and skills in digital skills. The objective of this study is to offer an analysis of the levels of intersectoral interdependence in the context of Ecuador's productive matrix, identifying the main challenges, strengths and opportunities. In this way, recommendations can be proposed for effective integration with digital transformation. The methodology consisted of reviewing the literature on digital transformation and its integration into Ecuador's productive matrix. Information was also collected from studies and statistical data on the adoption of digital technologies in the country.

Summary: The fraction of vegetation cover (FVC) and the Leaf Area Index (LAI) are biophysical variables closely related to the evapotranspiration rate of crops and their biomass production. Despite their importance, they are usually not measured directly due to their time-consuming and costly nature; however, they can be estimated on a large scale and near-real-time using spectral information captured in satellite images, although this requires prior validation at the field level. Simple linear regression models were developed and validated using 13 vegetation indices (VI) related to LAI and FCV in alfalfa (Medicago sativa). Three spectral information sources were used: (i) reflectance to derive the VI; (ii) digital photographs processed with the Canopeo application to estimate FVC; and (iii) direct LAI measurements using a ceptometer. Six field samples were taken between March and June, 2020 in four alfalfa plots located in Palmar de Bravo, Puebla, Mexico. To evaluate each VI, the determination coefficient (R2) and the root mean square error (RMSE) were used. We found that the most suitable VI for estimating FVC was the VIgreen (Green Vegetation Index, R2 =0.987 and RMSE = 0.093). For the LAI, the VI that performed best was the NDVI (Normalized Difference Vegetation Index, R2 = 0.935 and RMSE = 0.746). The results showed the suitability and practical utility of spectral information for estimating biophysical variables in alfalfa cultivation and their monitoring.

Resumen: La fracción de cobertura vegetal (FCV) y el índice de área foliar (IAF) son variables biofísicas relacionadas estrechamente con la tasa de evapotranspiración de los cultivos y su producción de biomasa. A pesar de su importancia, usualmente no se miden de manera directa debido al tiempo invertido y costo; sin embargo, se pueden estimar a gran escala y en tiempo casi real mediante información espectral captada en imágenes de satélite, pero esto requiere de su validación a nivel de campo. Se desarrollaron y validaron modelos de regresión lineal simple utilizando 13 índices de vegetación (IV) relacionados con el IAF y la FCV en alfalfa (Medicago sativa). Se usaron tres fuentes de información espectral: (i) La reflectancia para derivar los IV; (ii) fotografías digitales procesadas con Canopeo para estimar la FCV; y (iii) mediciones del IAF utilizando un ceptómetro. Se realizaron seis muestreos de campo entre marzo y junio de 2020, en cuatro parcelas de alfalfa situadas en Palmar de Bravo, Puebla, México. Para evaluar cada IV, se utilizó el coeficiente de determinación (R2) y la raíz del cuadrado medio del error (RCME). Se encontró que el IV más apropiado para estimar la FCV fue el VIgreen (Green Vegetation Index, R2 = 0.987 y RCME = 0.093). En el caso del IAF, el IV que presentó el mejor desempeño fue el Normalized Difference Vegetation Index (NDVI), R2 = 0.935 y RCME = 0.746). Los resultados mostraron la aptitud y utilidad práctica de la información espectral para estimar las variables biofísicas en el cultivo de alfalfa y su monitoreo.

Abstract This action research study focused on determining the contribution of digital reading through the Edpuzzle platform to improve reading comprehension in 21 fifth-grade students from a municipal elementary school in Chile. It was carried out over seven sessions during which reading comprehension activities in Edpuzzle were used to identify specific information. Data were collected through statistics provided by Edpuzzle, a Likert scale, and two focus groups. Although the results did not reveal significant progress in the evaluated skill, most participants expressed a positive perception of their performance during the interventions. Therefore, these findings may be relevant for those seeking to use online platforms like Edpuzzle to improve students' reading comprehension, as despite the lack of evident improvements, participants enjoyed the activities and experienced a sense of achievement.

Resumen Este estudio de investigación acción se centró en determinar la contribución de la lectura digital a través de la plataforma Edpuzzle para mejorar la comprensión lectora en 21 estudiantes de quinto año de una escuela básica municipal en Chile. Se llevó a cabo durante siete sesiones en las cuales se utilizaron actividades de comprensión lectora en Edpuzzle para identificar información específica. Los datos se recopilaron a través de las estadísticas proporcionadas por Edpuzzle, una escala Likert y dos grupos focales. Aunque los resultados no revelaron un avance significativo en la habilidad evaluada, la mayoría de los participantes expresaron una percepción positiva sobre su desempeño durante las intervenciones. Por lo cual, estos hallazgos pueden ser relevantes para quienes buscan utilizar plataformas en línea como Edpuzzle para mejorar la comprensión lectora de los estudiantes, ya que, a pesar de la falta de mejoras evidentes, los participantes disfrutaron de las actividades y experimentaron una sensación de logro.

Resumen: La pandemia por COVID-19 influyó en el proceso de educación superior generando una transición entre la modalidad presencial a la modalidad en línea-emergente en la que se identificaron varias dificultades para el acceso debido a la inequidad, problemas tecnológicos, crisis de salud y económica a nivel mundial, y en Ecuador a nivel de docentes y estudiantes. El descubrimiento de conocimiento en bases de datos de KDD - Educacional, el análisis de técnicas de minería de datos de clasificación y agrupación, y el complemento de análisis de datos con la inteligencia de negocios determinaron los factores desde la perspectiva de la institución, del docente y de los estudiantes que inciden en el proceso de educación en línea, donde se demuestra además, la importancia del modelo de educación, la metodología del proceso de enseñanza aprendizaje, el entorno de aprendizaje y el bienestar de los docentes y estudiantes que garantizan una educación superior en línea de calidad con igualdad de oportunidades en el acceso.

Abstract: The COVID-19 pandemic significantly impacted higher education, forcing a rapid transition from face-to-face modality to the emerging online learning modality. This transition exposed several challenges, including, inequitable access to technology, global health and economic crisis, and specific difficulties faced by both teachers and students in Ecuador. Knowledge discovery in KDD - Educational databases, the analysis of classification and clustering data mining techniques and the complement of data analysis with business intelligence determined the factors from the perspective of the institution, teachers and students that influence the online education process. In addition, the importance of the education model, the teaching-learning process methodology, the learning environment, and the well-being of teachers and students that guarantee quality online higher education with equal access opportunities is demonstrated.

Resumen: La investigación determinó el efecto de la mediación de un videojuego educativo en el fortalecimiento de la resolución de problemas de matemáticas. El método cuantitativo con alcance descriptivo fue aplicado. La muestra fue no probabilística con 20 estudiantes de la Institución Educativa San Jorge, en la vereda Las Damas, Municipio de Purificación, Departamento de Tolima. Las variables estudiadas fueron: desempeño en resolución de problemas, mecánicas y percepción del videojuego. La encuesta inicial reflejó que un 90% no poseían habilidades matemáticas básicas y tenían una percepción negativa del área. Entonces, fue diseñada una estrategia educativa con un videojuego denominado Corredor Matemático de Pensamiento Variacional (Comapeva), en tercera persona con Unity 3D, Adobe Ilustrator y Autodesk 3d. Fue protagonizado por Comaco: joven aventurero que superó retos matemáticos. El guion narrativo combinó elementos del constructivismo, Aprendizaje Basado en Retos (ABR) y modelo instruccional ADDIE (Análisis, Diseño, Desarrollo, Implementación y Evaluación). La herramienta fue implementada con el apoyo de los docentes. Con el videojuego el 100% de los estudiantes resolvieron retos con diversas estrategias. Disminuyó un 21% el tiempo de desarrollo de los problemas, y un 33% las solicitudes de apoyo del docente. La concentración, atención, memoria, agilidad mental, interpretación y análisis fueron fortalecidas. El videojuego facilitó la construcción de conocimientos en matemáticas de forma sustancial. En consecuencia, fue innovador, motivador y permitió la trasformación de prácticas educativas según las necesidades de aprendizaje.

Abstract: The research considers the effect of the mediation of an educational video game in strengthening mathematics problem solving. The quantitative method with a descriptive scope was applied. The sample was non-probabilistic with 20 students from the San Jorge Educational Institution, in Las Damas village, Municipality of Purificación, Department of Tolima. The variables studied were problem-solving performance, game mechanics, and videogame perception. The initial survey showed that 90% of the students did not have basic mathematical skills and had a negative perception of the subject area. Therefore, an educational strategy was then designed using a video game called the Variational Thinking Mathematical Corridor (Comapeva). The game was developed in third person using Unity 3D, Adobe Illustrator, and Autodesk 3d. It starred Comaco: a young adventurer who overcame mathematical challenges. The narrative script combined elements of constructivism, Challenge-Based Learning (CBL) and instructional model ADDIE (Analysis, Design, Development, Implementation and Evaluation). The tool was implemented with the support of the teachers. With the video game, 100% of the students were able to solve challenges using various strategies. Problem development time decreased by 21%, and teacher support requests decreased by 33%. Concentration, attention, memory, mental agility, interpretation, and analysis skills were all strengthened. The video game facilitated the construction of knowledge in mathematics in a substantial way. Consequently, the video game was found to be innovative and motivating, and it allowed for the transformation of educational practices according to the students' learning needs.

Resumen La cuenca baja del río Acre se ubica en una zona de deforestación con la implementación de pastizales para ganado vacuno en suelos susceptibles a la erosión y clima ecuatorial. La existencia de mataderos y ganado vacuno en el municipio de Boca do Acre, en el estado de Amazonas, es uno de los problemas vinculados a la deforestación en la Amazonía brasileña. Ante este escenario, se presentó una estimación de las pérdidas de suelo con la aplicación de la Ecuación Universal en un sistema de información geográfica. En la metodología, se desarrolló una base de datos con información vectorizada para extraer las áreas de tipos de suelo y cobertura del suelo, incluyendo el análisis espacial de pendientes extraído del modelo digital de elevación. Como resultado del análisis de las áreas por geoprocesamiento y vectorización, se obtuvieron los cálculos de las parcelas de erosión a través de tablas con los parámetros adoptados por los referentes científicos. Se encontró que el 60% de la pérdida de suelo ocurre en el área agrícola en el 11% del territorio de la cuenca, siendo predominantemente en áreas de asentamientos rurales en el estado de Acre. Como resultado de la estimación, la pérdida de suelo en la cuenca baja del río Acre fue de 386.422 t/ha/año, con una producción de 46 millones de toneladas de sedimentos por año.

Abstract The Lower Acre River Basin is located in an area of deforestation with the implementation of pastures for beef cattle ranching in soils susceptible to erosion and equatorial climate. The existence of slaughterhouses and beef cattle in the municipality of Boca do Acre, in the state of Amazonas, is one of the problems linked to deforestation in the Brazilian Amazon. Given this scenario, an estimate of soil losses was presented with the application of the Universal Equation in a geographic information system. In the methodology, a database was elaborated with vectorized information for the extraction of the areas of the types of soils and land cover, including the spatial analysis of slopes extracted from the digital elevation model. Due to the analysis of the areas by geoprocessing occurring by vectorization, the calculations of the erosion plots were obtained through tables with the parameters adopted by the scientific references. It was found that 60% of the soil loss occurs in the area of agriculture in 11% of the territory of the watershed, being predominantly in areas of rural settlements of the state of Acre. As a result of the estimate, soil loss in the Lower Acre River Basin was 386,422 t/ha/year, with a production of 46 million tons of sediment per year.

Resumo A Bacia do Baixo Rio Acre está localizada em uma área de desflorestamento com implantação de pastagens para pecuária de corte em solos suscetíveis à erosão e clima equatorial. A existência de abatedouros e pecuária de corte implantada no município de Boca do Acre, no Amazonas, é um dos problemas vinculados ao desmatamento da Amazônia Brasileira. Diante desse cenário, foi apresentada uma estimativa de perdas de solo com aplicação da Equação Universal em sistema de informação geográfica. Na metodologia, foi elaborado um banco de dados com informações vetorizadas para extração das áreas dos tipos de solos e cobertura da terra, incluindo a análise espacial de declividades extraídas do modelo digital de elevação. Em decorrência da análise das áreas pelo geoprocessamento ocorrer pela vetorização, foram obtidos os cálculos das parcelas de erosão através de tabelas com os parâmetros adotados pelas referências científicas. Foi constatado que 60% da perda de solo ocorrem na área de agricultura em 11% do território da bacia hidrográfica, sendo predominantemente em áreas de assentamentos rurais do estado do Acre. Como resultado da estimativa, a perda de solos na Bacia do Baixo Rio Acre foi de 386.422 t/ha/ano, com uma produção de 46 milhões de toneladas de sedimentos por ano.

Resumen El Valle de Comayagua en Honduras, ubicado en las coordenadas 14˚38’44.73” N y 87˚38’04.90” O, destaca por su altitud de 630 metros sobre el nivel del mar y su extensión de 52 km de largo por 15 km de ancho, abarcando 535 km². Carece de estudios que aborden su unidad territorial y geomorfológica. La investigación busca identificar y analizar la forma y elementos físicos naturales mediante el uso de Sistemas de Información Geográfica, trazando ríos, elaborando modelos de elevación digital y creando perfiles topográficos. Los resultados revelan elementos clave para comprender la ocupación y uso del territorio.

Resumo O Vale de Comayagua em Honduras, localizado nas coordenadas 14˚38’44.73” N e 87˚38’04.90” O, destaca-se por sua altitude de 630 metros acima do nível do mar e sua extensão de 52 km de comprimento por 15 km de largura, abrangendo 535 km². Carece de estudos que abordem sua unidade territorial e geomorfológica. A pesquisa busca identificar e analisar a forma e os elementos físicos naturais por meio do uso de Sistemas de Informação Geográfica, traçando rios, elaborando modelos de elevação digital e criando perfis topográficos. Os resultados revelam elementos-chave para compreender a ocupação e o uso do território.

Abstract The Comayagua Valley in Honduras, located at coordinates 14˚38’44.73” N and 87˚38’04.90” W, stands out for its altitude of 630 meters above sea level and its dimensions of 52 km in length by 15 km in width, covering an area of 535 km². Despite its economic and connectivity importance, there is a lack of studies addressing its territorial and geomorphological unity and a characterization of its current territorial morphology. The objective of the research is to identify and analyze the shape and natural physical elements that define the Comayagua Valley. To achieve this, Geographic Information Systems tools were used to analyze river layouts, create a digital elevation model, and generate topographic profiles. The main results of this analysis reveal the natural physical elements that shape the valley, which are of vital geo-historical importance for understanding the processes of occupation and land use in the valley.

Resumen: La cuenca binacional del río Zarumilla es un lugar con gran diversidad de especies y es de gran importancia para la economía de Perú y Ecuador. Estos factores socioeconómicos pueden traer consigo cambios en la distribución de las coberturas del suelo, los cuales afectan de manera negativa los ecosistemas. El presente estudio tiene como objetivo evaluar los cambios de cobertura y uso de suelo durante el periodo 1992-2022 y construir una proyección al año 2040 siguiendo las tendencias de uso actuales y su patrón histórico. Se usaron mapas de cobertura y uso de suelo de los años 1992 y 2022, así como información georreferenciada que fue usada para encontrar los factores condicionantes para el cambio de suelo. El modelo de prospección se basó en la implementación de cadenas de Markov y autómatas celulares usando factores condicionantes para construir una proyección más precisa. Los resultados obtenidos reflejan una pérdida neta de 11378 hectáreas de bosque durante el periodo 1992-2022, ocurriendo el 87.7% de esta pérdida en el lado ecuatoriano de la cuenca. A este ritmo se puede prospectar una pérdida de bosque de 10552 hectáreas para el periodo 2022-2040, de igual manera prevista principalmente en el lado ecuatoriano. El modelo prospectivo también resalta que los principales cambios se producirán en áreas de baja altitud y en proximidad a fuentes hídricas y carreteras. Esta es una pérdida alarmante de bosque nativo, la cual se puede evitar mediante la creación de políticas de desarrollo sostenible y programas de ordenamiento territorial.

Abstract: The binational basin of the Zarumilla River is a place with great species diversity and is particularly important to the economy of Peru and Ecuador. These socioeconomic factors can lead to changes in land cover distribution, which negatively affect ecosystems. The present study aims to evaluate changes in land cover and use during the period 1992-2022 and to generate a projection for the year 2040 following current usage trends and historical patterns. Land cover and use maps from 1992 and 2022 were used, along with georeferenced information that was employed to identify the conditioning factors for land change. The prospection model was based on the implementation of Markov chains and cellular automata using conditioning factors to build a more accurate projection. The results obtained reflect a net loss of 11378 hectares of forest during the period 1992-2022, with 87.7% of this loss occurring on the Ecuadorian side of the watershed. At this rate, a forest loss of 10552 hectares can be projected for the period 2022-2040, similarly projected mainly on the Ecuadorian side. The projection model also highlights that the main changes will occur in low-altitude areas and in proximity to water sources and roads. This is an alarming loss of native forest, which can be avoided through the creation of sustainable development policies and land-use planning programs.

Resumen: El hormigón es el material principal utilizado en la construcción en Ecuador. Para su diseño, se consideran dos características: la resistencia a la compresión y el módulo de elasticidad. El módulo de elasticidad se calcula convencionalmente en relación con la resistencia a la compresión, mediante ecuaciones establecidas en códigos de diseño. Sin embargo, investigaciones han demostrado que estas ecuaciones no reflejan con precisión la realidad en Ecuador, ya que el módulo de elasticidad no solo depende de la resistencia a la compresión, sino también de otras variables como el origen del agregado, el tipo de cemento, el proceso de producción, entre otros. En este estudio, se desarrolla un modelo que utiliza la teoría de lógica difusa para estimar el módulo de elasticidad. Se emplea un sistema de inferencia lógica ANFIS (Adaptive Neuro Fuzzy Inference Systems), utilizando datos previos de ensayos de laboratorio como conocimiento previo para crear funciones de membresía (FMs) y reglas difusas del tipo condicional (If-Then) para estimar nuevos datos del módulo de elasticidad. Además de la resistencia a la compresión, se consideran otras variables importantes en la determinación del módulo de elasticidad. Los resultados son favorables, con un coeficiente de correlación R2=0.988 y una desviación estándar S=0.097, lo que indica que el sistema de inferencia lógica (SIL) es capaz de desarrollar un modelo único que permite considerar todas las variables que influyen en la determinación del módulo de elasticidad y proporcionar valores confiables.

Abstract: Concrete is the most frequently used construction material in Ecuador. Two characteristics considered for its design are compressive strength and modulus of elasticity. The latter is conventionally calculated in relation to the former using equations established in design codes. However, research has shown that these equations do not accurately reflect the reality in Ecuador, as the modulus of elasticity depends not only on compressive strength but also on other variables such as aggregate origin, type of cement, production process, among others. In this study, a model using fuzzy logic is developed to estimate the modulus of elasticity by applying an ANFIS (Adaptive Neuro Fuzzy Inference Systems) logical inference system. Previous laboratory test data are used as prior knowledge to create membership functions (MFs) and fuzzy conditional rules (If-Then) to estimate new modulus of elasticity. In addition to compressive strength, other important variables are considered in the determination of the modulus of elasticity. The results are favorable, with a correlation coefficient R2=0.988 and a standard deviation S=0.097, indicating that the logical inference system (LIS) is capable of developing a unique model that allows considering all variables that influence the determination of the modulus of elasticity and providing reliable results.