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

Chemometrics is gaining more and more space in universities and industry. To contribute to the development and expansion of principal component analysis (PCA) teaching proposals, this work evaluated the answers of the students to a questionnaire and presented a didactic-pedagogical proposal that can contribute to solving the principal doubts achieved by students in the PCA interpretation. Based on data collected in a semi-open questionnaire, the proposal was developed based on methodological principles of historical-critical pedagogy, containing the objectives, the problems surrounding the topic, and the cultural instruments necessary for understanding and interpreting PCA in the discipline of chemometrics by using new resources and instruments, especially free software, Chemostat. This proposal covers topics related to the concept of chemometrics and PCA, the explanation of the data set, pre-processing, use of Chemostat software, and analysis of principal components. It is hoped that this proposal can promote a better understanding concerning PCA on the part of students, as well as effective incorporation of the phenomena that involve this tool and its applications, and interpretation. Likewise, it is expected that this didactic-pedagogical proposal can support new teaching practices in chemometrics subjects in higher education. industry (PCA proposals didacticpedagogical didactic pedagogical interpretation semiopen semi open historicalcritical historical critical pedagogy objectives topic software set preprocessing, preprocessing pre processing, processing pre-processing components applications Likewise education

Resumo: O avanço da tecnologia da informação tem levado ao aumento do uso da estatística como uma ferramenta de análise de dados em diversas áreas acadêmicas. A estatística tornouse um requisito essencial em qualquer programa de estudo, devido à variedade de aplicações na indústria e na investigação. Portanto, os programas educativos no ensino superior precisam formar graduados que possuam conhecimentos estatísticos teóricos e aplicados. Existem diferentes ferramentas tecnológicas estatísticas, cada uma com as suas próprias vantagens e desvantagens para análise de dados. Porém, neste trabalho o software estatístico Jamovi foi considerado por ser um recurso tecnológico versátil, gratuito e de código aberto. Com base no exposto, este artigo estuda o impacto da integração do software Jamovi no ensino de estatística na área de Engenharia Civil. A população do estudo foi de 40 estudantes do Mestrado em Planejamento Físico de Obras Civis da Universidade Estadual do Sul de Manabí, durante os meses de novembro a dezembro de 2023. A metodologia aplicada foi observacional analítica com design quantitativo, para esse fim técnicas estatísticas descritivas e inferenciais fo ram utilizadas. Os resultados mostraram um desempenho superior das pessoas que utilizaram o Jamovi em comparação aos que utilizaram o MS Excel. Isto foi corroborado por meio de análises descritivas e testes de hipóteses. De acordo com os resultados concluiuse que Jamovi facilitou o processo de ensino e aprendizagem de estatística na Engenharia Civil.

Resumen. El avance de la tecnología de la información ha llevado a un aumento en el empleo de la estadística como una herramienta para analizar datos en diversas áreas académicas. La estadística se ha convertido en un requisito primordial en cualquier programa de estudio, debido a la variedad de aplicaciones en la industria y la investigación. Por consiguiente, los programas educativos en la educación superior necesitan formar graduados que posean conocimientos estadísticos teóricos y aplicados. Existen diferentes herramientas tecnológicas esta dísticas, cada una con sus propias ventajas y desventajas para el análisis de datos. Sin embargo, en este trabajo se ha considerado el software estadístico Jamovi por ser un recurso tecnológico versátil, gratuito y de código abierto. A raíz de lo expuesto, este artículo estudia el impacto de la integración del software Jamovi en la enseñanza de la estadística en el área de la Ingeniería Civil. La población de estudio fue de 40 estudiantes de la Maestría en Planificación Física de Obras Civiles de la Universidad Estatal del Sur de Manabí, durante los meses de noviembre a diciembre de 2023. La metodología aplicada fue observacional analítica con un diseño cuantitativo, para ello se emplearon técnicas estadísticas descriptivas e inferenciales. Los resultados mostraron un rendimiento superior de las personas estudiantes que utilizaron Jamovi en comparación con quienes emplearon Excel. Esto se corroboró mediante análisis descriptivos y pruebas de hipótesis. De acuerdo con los resultados, se pudo concluir que Jamovi facilitó el proceso de enseñanza y aprendizaje de la estadística en la Ingeniería Civil.

Abstract: Advances in information technology have led to an increased use of statistics as a tool for analyzing data in various academic fields. Statistics has become a primary requirement in any curriculum because of its wide range of applications in the industry and for research purposes. Higher education programs therefore need to prepare graduates with both theoretical and applied statistical knowledge. There are several statistical technology tools for data analysis, each with its own advantages and disadvantages. This article examines Jamovi, a statistical software that is versatile, free and open source, and the impact of this tool on the teaching of statistics for civil engineering. The study involved 40 students of the Masters in Physical Planning of Civil Works of the Universidad Estatal del Sur de Manabí, and was carried out during the months of November to December 2023. The study applied an analytical observational methodology with a quantitative design, using descriptive and inferential statistical techniques. The results showed a better performance of the students who used Jamovi com pared to those who used MS Excel. This was supported by descriptive analysis and hypothesis testing. The results led to the conclusion that Jamovi facilitated the teaching and learning process of statistics in civil engineering.

Abstract The Galapagos Islands, a natural heritage of humanity, have meticulous control of wildlife and strict inspection of the number and frequency of visitors. The increase in tourists, apart from positive aspects, and the increase in population generates a greater demand for electrical energy. In this sense, Galapagos seeks a boost to comprehensive energy sustainability, replacing thermal energy with environmentally friendly Non-Conventional Renewable Energy (NCRE), through the optimal energy management project through the Conolophus microgrid project. This document analyzes the optimal management of electrical energy (short-term economic dispatch) considering the stochasticity presented by the high insertion of NCRE in the Santa Cruz-Baltra electrical system. For it. The free simulation software called “SimSEE” (Electric Energy Systems Simulator) is used, where operational scenarios are modeled with and without the Conolophus project in order to analyze its impact on the planning of the operation of the Santa Cruz-Baltra system.

Resumen: Las islas Galápagos, patrimonio natural de la humanidad, cuentan con un control minucioso de la vida silvestre y ejercen estricta inspección del número y frecuencia de visitantes. El incremento de turistas, aparte de aspectos positivos, y el incremento de la población genera una mayor demanda de energía eléctrica. En este sentido, Galápagos busca un impulso a la sostenibilidad energética integral, reemplazando la energía térmica con Energías Renovables No Convencionales (ERNC), amigables con el medio ambiente, a través del proyecto de gestión óptima de la energía mediante el proyecto de microrred Conolophus. En el presente documento se analiza la gestión óptima de la energía eléctrica (despacho económico de corto plazo) considerando la estocasticidad que presenta la alta inserción de ERNC en el sistema eléctrico Santa Cruz-Baltra. Para ello. se usa el software libre de simulación denominado “SimSEE” (Simulador de Sistemas de Energía Eléctrica), donde se modelan escenarios operativos con y sin el proyecto Conolophus con la finalidad de analiza su impacto en la planificación de la operación del sistema Santa Cruz-Baltra.

ABSTRACT. Using geotechnologies has become fundamental for planning the sustainable expansion of agricultural activities, especially fish farming. The objective of this work was to map and carry out the morphological characterization of the hydrographic micro-basins and their physical aspects, such as slope, altimetry, and land use and occupation, and also to quantify and locate the existing excavated ponds in the municipality of Pato Bragado, in Paraná State. Geotechnology tools and images generated by the free software QGIS and Google Earth were used to create maps of the excavated ponds' physical aspects, quantification, classification, and location. The predominant slope in the municipality is gently undulating, and soy plantation uses 42.99% of the municipality's entire area. The mapping located 190 excavated ponds. Depth measurement was not carried out, but rather mapping concerning water depths representing a total area of 47.86 ha of water blade and nine micro-basins within the municipality of Pato Bragado, with only the Arroio Fundo micro-basin covering 47.37% of all existing excavated ponds. The morphometric indicators concluded that the micro-basins present a minimum risk of flooding, which is ideal for use in fish farming. Making the results of this work available to public managers and fish farmers aims to demonstrate the importance of using geotechnologies for sustainable planning to expand aquaculture activities, which, in this case, are focused on fish farming.

Abstract: The objective of this research study is to develop a simple application on Microsoft Excel for univariate statistical analysis of experiments. Classic ANOVA procedures are included for models with or without factorial structure (double or triple, including additional treatments), split-plot, split-block, simple nested, and repeated ANOVA measures of balanced or unbalanced data. The tool can run average tests and perform regression analysis for linear and non-linear models. The application automatically performs tests for normality, homoscedasticity, and additivity requirements. In case of violation, the program also automatically scans for outliers or a suitable data transformation. The application also allows the performance of ANCOVA and provides the Papadakis method for correction of spatial autocorrelation and other analyses. The application (available for free at speedstatsoftware.wordpress.com in English, Portuguese, and Spanish) has been tested with the resolution of hundreds of examples and is also adapted for use in LibreOffice.

Resumen: El objetivo de esta investigación es desarrollar una aplicación sencilla en Excel para el análisis estadístico univariado de experimentos. Se incluyen procedimientos de ANOVA clásicos con o sin estructura factorial (doble o triple, incluyendo tratamientos adicionales), de parcela dividida, de split-blocks, nested y ANOVA de medidas repetidas para datos balanceados o desbalanceados. La herramienta puede ejecutar pruebas de promedios y análisis de regresión para modelos lineales y no lineales. La aplicación realiza automáticamente pruebas para verificar los requisitos de normalidad, homocedasticidad y aditividad. En caso de infracción, el programa también busca automáticamente valores atípicos o recomienda una transformación de datos adecuada. El software también permite la realización de ANCOVA y proporciona el método Papadakis para la corrección de autocorrelación espacial, entre otros análisis. La aplicación (disponible de forma gratuita en speedstatsoftware.wordpress.com, con versiones en inglés, portugués y español) ha sido probada con éxito en la resolución de cientos de ejemplos y también ha sido adaptada para su uso en LibreOffice.

ABSTRACT: This research evaluated different rice genotypes regarding physicochemical and instrumental parameters of grain quality and associated the data with sensory analysis to support the creation of rules for classification of the culinary quality of rice (texture), based on isolated or combined parameters. The combination of amylose content and gelatinization temperature was able to predict the rice quality. According to the sensorial panel, the instrumental stickiness was able to segregate rice with very low amylose content or waxy to the other ones. Regarding pasting properties, rice that presented high final viscosity (310-480 RVU), setback (165-245 RVU), and pasting temperature (78 - 88 °C), and low values for breakdown (15-120 RVU), associated with a high stickiness (>-5N) was desirable by the Brazilian consumers. The classification rules created through the relationship between the physicochemical parameters and the texture profile evaluated by the sensory panel will help to verify the culinary profile of the rice samples (through free software), which makes it easier to predict the probability of rice meeting the desired quality standards. ABSTRACT texture, , (texture) ones properties 310480 310 480 (310-48 RVU, RVU RVU) 165245 165 245 (165-24 78 (7 8 °C, C °C °C) 15120 15 120 (15-12 >5N 5N N > (>-5N consumers software, software software) standards (texture 31048 31 48 (310-4 16524 16 24 (165-2 7 ( 1512 1 12 (15-1 3104 3 4 (310- 1652 2 (165- 151 (15- (310 (165 (15 (31 (16 (1 (3

RESUMO: Este trabalho avaliou diferentes genótipos de arroz quanto a parâmetros físico-químicos e instrumentais de qualidade do grão e associou os dados à análise sensorial para subsidiar a criação de regras de classificação da qualidade culinária do arroz (textura), com base em parâmetros isolados ou combinados. A combinação do teor de amilose e temperatura de gelatinização foi capaz de predizer a qualidade do arroz. De acordo com o painel sensorial, a pegajosidade instrumental foi capaz de segregar arroz com baixo teor de amilose ou ceroso dos demais. Em relação às propriedades de pasta, o arroz que apresentou alta viscosidade final (310-480RVU), retrogradação (165-245RVU) e temperatura de pasta (78-88 °C) e baixos valores de quebra pasta (15-120RVU), associados a uma alta pegajosidade (> -5N) será desejável pelos consumidores brasileiros. As regras de classificação criadas por meio da relação entre os parâmetros físico-químicos e o perfil de textura avaliado pelo painel sensorial ajudarão a verificar o perfil culinário das amostras de arroz (por meio de um software livre), o que torna mais fácil prever a probabilidade de o arroz atender aos padrões de qualidade desejados. RESUMO físicoquímicos físico químicos textura, , (textura) combinados demais 310480RVU, 310480RVU RVU 310 480RVU (310-480RVU) 165245RVU 165 245RVU (165-245RVU 7888 78 88 (78-8 °C C 15120RVU, 15120RVU 15 120RVU (15-120RVU) > ( 5N N -5N brasileiros livre, livre livre) desejados (textura 31 (310-480RVU 16 788 7 8 (78- 1 (15-120RVU 3 (78 (7

ABSTRACT The proposed research, in the area of talent selection in high performance, specifically in the poomsae modality in its free style event, represents a strategic study, since limitations were found in the selection process in said sporting modality. Therefore, this work presented the objective of evaluating the technical indicators for the selection of athletes with respect to the poomsae modality in its free style event. This selection is made in accordance with the current competitive regulatory requirements, applied by the World Federation of this sport. Theoretical level methods like inductive-deductive, analytical-synthetic and historical were used and from the empirical level, documentary review and measurement, and the angles of the proposed indicators were measured through the Kinovea biomechanical software. The statistical technique used was the SPSS 20 statistical processor. There were defined and evaluated in a practical way the indicators of flexibility (central, left lateral, right lateral splits ) with an average of 10.25 points; kicking techniques (basic kicks, holding, kicks with spin in the air) with average results of 2.5; 1.9 and 1.87 points; acrobatic jumps (stride jumps, left split jumps , right split jumps ) and acrobatic elements with average results of 8.69 and 2.21 points, for the selection process of school sports initiation schools in the poomsae modality in their free style event .

RESUMEN La investigación propuesta, en el área de selección de talentos en el alto rendimiento, específicamente en la modalidad de poomsae, en su evento free style, representa un estudio estratégico, pues se encontraron limitaciones en el proceso de selección en dicha modalidad deportiva. Por lo que este trabajo presentó como objetivo evaluar los indicadores técnicos para la selección de atletas con respecto a la modalidad de poomsae en su evento free style. Esta selección se realiza acorde con las exigencias reglamentarias competitivas actuales, aplicadas por la Federación Mundial de este deporte. Se utilizaron métodos de nivel teórico inductivo-deductivo, analítico-sintético, así como histórico y del nivel empírico, la revisión documental y la medición. Se midieron los ángulos de los indicadores propuestos, a través del software biomecánico Kinovea. La técnica estadística utilizada fue el procesador estadístico SPSS 20. Se definieron y evaluaron de forma práctica los indicadores flexibilidad (splits central, lateral izquierdo, lateral derecho) con una media de 10.25 puntos; técnicas de pateo (pateos básicos, mantención, pateos con giro en el aire) con resultados de media de 2.5; 1,9 y 1.87 puntos; saltos acrobáticos (saltos en horcajadas, saltos en splits izquierdo, saltos en splits derecho) y los elementos acrobáticos con resultados de media de 8.69 y 2.21 puntos, para el proceso de selección de las escuelas de iniciación deportiva escolar en la modalidad de poomsae en su evento free style.

RESUMO A pesquisa proposta, na área de seleção de talentos no alto rendimento, especificamente na modalidade poomsae, em sua prova de estilo livre, representa um estudo estratégico, uma vez que foram encontradas limitações no processo de seleção na referida modalidade esportiva. Portanto, este trabalho apresentou o objetivo de avaliar os indicadores técnicos para seleção de atletas no que diz respeito à modalidade poomsae em sua prova de estilo livre. Esta seleção é feita de acordo com os requisitos regulamentares competitivos em vigor, aplicados pela Federação Mundial desta modalidade. Foram utilizados métodos de nível teórico indutivo-dedutivo, analítico-sintético, bem como de nível histórico e empírico, revisão documental e mensuração. Os ângulos dos indicadores propostos foram medidos através do software biomecânico Kinovea. A técnica estatística utilizada foi o processador estatístico SPSS 20. Os indicadores de flexibilidade (abertura central, lateral esquerda, lateral direita) foram definidos e avaliados de forma prática com média de 10,25 pontos; técnicas de chutes (chutes básicos, segurar, chutes com giro no ar) com resultados médios de 2,5; 1,9 e 1,87 pontos; saltos acrobáticos (saltos de passada, saltos divididos à esquerda, saltos divididos à direita) e elementos acrobáticos com resultados médios de 8,69 e 2,21 pontos, para o processo seletivo das escolas de iniciação esportiva escolar na modalidade poomsae em sua prova de estilo livre.

ABSTRACT In this work, the implementation of solar panels in the Villa Clara Dairy Products Company, UEB Sagua la Grande, is evaluated. Measurements of the structures were made and optimal orientations were chosen to improve performance. The free software of the European commission PVGIS was used to facilitate the study of the solar resource and photovoltaic potential. It is a very useful tool for carrying out feasibility studies of photovoltaic systems. With the performance analysis, an annual generation of 648.5 MWh is forecast. This approach is not only energy efficient, but environmentally significant, as it will avoid the emission of 9,453 tons of CO2, 53 tons of SO2 and 18 tons of NO2 into the atmosphere. In addition, it is highlighted that the project will contribute to saving the country 2,882 tons of fuel. These results underline the importance and potential of renewable energy, not only to reduce dependence on fossil fuels, but also to mitigate climate change by reducing greenhouse gas emissions.

RESUMEN En el presente trabajo se evalúa la implementación de paneles solares en la Empresa de Productos Lácteos Villa Clara, UEB Sagua la Grande. Se realizaron mediciones de las estructuras y se eligieron las orientaciones óptimas para mejorar el rendimiento. Se utilizó el software gratuito de la comisión europea PVGIS, para facilitar el estudio del recurso solar y el potencial fotovoltaico. Se trata de una herramienta muy útil para hacer estudios de viabilidad de sistemas fotovoltaicos. Con el análisis de rendimiento, se pronostica una generación anual de 648,5 MWh. Este enfoque no solo es energéticamente eficiente, sino ambientalmente significativo, ya que evitará la emisión de 9453 toneladas de CO2, 53 toneladas de SO2 y 18 toneladas de NO2 a la atmósfera. Además, se destaca que el proyecto contribuirá al ahorro de 2882 toneladas de combustible al país. Estos resultados subrayan la importancia y el potencial de las energías renovables, no solo para reducir la dependencia de los combustibles fósiles, sino también para mitigar el cambio climático al reducir las emisiones de los gases de efecto invernadero.

Abstract Among the skills to be developed in the study of reactive power compensation control devices in electrical power systems is the analysis of the control models of static reactive compensators. Python is free software that allows data analysis, control and simulation of electrical power systems. The objective of the article is to propose an application that allows the study of reactive power compensation that helps improve the teaching-learning process of the subject of Power Electronics. The study was based on a qualitative - descriptive methodology in which analytical - synthetic and inductive - deductive methods were used and the survey was used as empirical methods. For the processing and analysis of the information collected, the calculation of absolute and relative frequencies was used as a statistical method. The results corroborate the importance of using the proposed method to improve the teaching-learning process.

Resumen Dentro de las habilidades a desarrollar en el estudio de los dispositivos de control de compensación de la potencia reactiva en los sistemas eléctrico de potencia se encuentra el análisis de los modelos de control de los compensadores estáticos de reactivo. Python es un software libre que permite realizar análisis de datos, control y simulación de sistemas eléctricos de potencia. El objetivo del artículo es proponer una aplicación que permita el estudio de la compensación de la potencia reactiva que ayude a mejorar el proceso de enseñanza - aprendizaje de la asignatura de Electrónica de Potencia. El estudio se basó en una metodología cualitativa - descriptiva en la que se utilizaron los métodos analíticos - sintético e inductivo-deductivo y como métodos empíricos se empleó la encuesta. Para el procesamiento y análisis de la información recopilada se utilizó como método estadístico el cálculo de las frecuencias absolutas y relativas. Los resultados corroboran la importancia de utilizar el método propuesto para mejorar el proceso de enseñanza - aprendizaje.

BACKGROUND: The transfer of all types of knowledge in occupational therapy practice is complex, and there is little agreement globally on the most important types of knowledge that inform clinical practice. This study aimed to uncover the perspectives of occupational therapists in the Free State, South Africa on knowledge transfer in clinical practice. METHODOLOGY: Q methodology was used to collect data from 14 occupational therapists utilising Q Method Software. RESULTS: Factor analysis revealed two factors with eigenvalues of greater than 1. Factor 1 had an eigenvalue of 2.97, and factor 2 had an eigenvalue of 1.48. These two factors were constructed from six and five participants' Q Sorts respectively, with the highest factor loads for factor 1 and factor 2. Thematic content analysis of these two factors identified two themes, namely: client-centred philosophy and practice informed through clinical reasoning. CONCLUSION: The strategic use of Q methodology presented empirical evidence of the transfer and utilisation of all types of knowledge in clinical practice in the Free State, South Africa. The results indicated the transfer of propositional, procedural, personal, and client knowledge strengthens client-centred practice and manifests in clinical reasoning. Furthermore, the results indicate an interdependence between the types of knowledge, meaning that it is important that therapists utilise all types of knowledge and not rely on only one form of knowledge when they work with patients to promote well-being. IMPLICATIONS FOR PRACTICE: • Q Methodology is an ideal research method to identify the subjective perspectives of participants where different opinions on a topic might exist. • Clinicians hold a wealth of practice experience and personal knowledge that should be shared and captured through research. • The client's voice needs to be heard more often to ensure client-centred practice is not only an idea on paper.

Abstract The aim of the work presented was the design of a metal mould for gravity die casting to obtain brake and clutch handles of aluminium alloys for Suzuki AX-100 motorbike. The maximum stresses to which the part is subjected were determined and evaluated by the finite element method, considering the composition of the existing raw materials, highlighting that the part obtained meets the strength requirements. The results of the simulations showed that the strength was sufficient, and so the design of the metal mould was started. For its design, an established methodology was used, with the Fourier-Kirchhoff models for the thermal regime, resulting in its dimensions. In turn, both filling and solidification were simulated by means of casting software, predicting the thermodynamic behavior and the transient phenomena of the fluid during the pouring process. Positive values were obtained for microporosity, Niyama criterion, flow velocity and solid evolution. The results allowed us to ensure that both the design and the operation of the mould guarantee the production of productive and defect-free handles.

Resumen El objetivo del trabajo presentado fue el diseño de un molde metálico de fundición por gravedad, para obtener manillas de freno y embrague, de aleaciones de aluminio, para la moto Suzuki AX-100. Se determinaron los esfuerzos máximos a los que se somete la pieza, además, evaluado por el método de elementos finitos, teniendo en cuenta la composición de las materias primas existentes en una empresa, destacando que la pieza obtenida cumple con los requisitos de resistencia. Los resultados de las simulaciones arrojaron que la resistencia era suficiente, por lo que se pasó al diseño del molde metálico. Para su diseño se empleó una metodología establecida, con los modelos de Fourier-Kirchhoff para el régimen térmico, resultando en las dimensiones de este. A su vez se simuló por medio de software de fundición tanto el llenado como la solidificación, pronosticando los comportamientos termodinámicos y los fenómenos transitorios del fluido durante el proceso de vertido. Se obtuvieron valores positivos para la microporosidad, criterio de Niyama, velocidad del flujo y, evolución del sólido. Los resultados permiten asegurar que tanto el diseño como el funcionamiento del molde garantizan la obtención de manillas de forma productiva y libres de defectos.

ABSTRACT The following research presents the calculation of the photovoltaic generation potential from the use of the roof surfaces of buildings for a case study. For this purpose, an energy study was carried out in the facility to identify the demand to be satisfied, and the constructive survey of the building was executed free of shadows that can be used for the mounting of photovoltaic panels considering the dimensions, orientation, and inclination of their roofs, in addition, the specific meteorological information of the territory was obtained, necessary for the generation calculations and its inclusion in the specialized software PVSyst. The PVSyst simulation showed that the company has an available area of 1,317 m2 of building roofs, an area where it is possible to install a total of 510 photovoltaic modules, with a generation capacity of 281 kWp and a real annual generation of 508,416 kWh/year. This photovoltaic installation is capable of covering 102.65 % of the facility's energy demand.

RESUMEN En la siguiente investigación se presenta el cálculo de las potencialidades de generación fotovoltaica a partir del aprovechamiento de las superficies de cubiertas de las edificaciones para un caso de estudio. Para ello se partió de un estudio energético realizado en la instalación con el objetivo de identificar la demanda que se pretende satisfacer y se ejecutó el levantamiento constructivo de la edificación libres de sombra que pueden emplearse para el montaje de paneles fotovoltaicos considerando las dimensiones, orientación e inclinación de sus cubiertas, además se obtuvo la información meteorológica específica del territorio, necesaria para los cálculos de generación y su inclusión en el software especializado PVSyst. La simulación con el PVSyst evidenció que en la empresa existe un área disponible de cubiertas de edificaciones de 1 317 m2, superficie donde es posible instalar un total de 510 módulos fotovoltaicos, con una capacidad de generación de 281 kWp y una generación anual real de 508 416 kWh/año. Dicha instalación fotovoltaica es capaz de cubrir el 102.65% de la demanda energética de la instalación.

Resumen: En la actualidad, como los recursos energéticos escasean cada vez más, se hace necesario aplicar una política de ahorro de suma eficiencia. En este contexto, es imprescindible el estudio y análisis de los sistemas eléctricos, fundamentalmente los sistemas de suministros en instalaciones de producción y servicios. Es importante señalar que, en las horas del pico eléctrico, hasta las máquinas generadoras menos eficientes tienen que funcionar incrementándose el consumo de petróleo por kWh generado, por otra parte, se presentan grandes dificultades para transferir la potencia de diferentes unidades generadoras hacia los lugares donde es consumida la electricidad en esas horas críticas. Por lo tanto, cuando la demanda de energía no está en correspondencia con la generación de las plantas generadoras es necesario entonces interrumpir algunas cargas, produciéndose los conocidos apagones y, por consiguiente, la molestia y afectaciones de los usuarios del servicio eléctrico, es en estos casos que se hace evidente la necesidad del acomodo de carga eléctrica. Por lo que el presente artículo tiene como objetivo proponer una aplicación para realizar el acomodo de cargas en los sistemas industriales, mediante una interfaz gráfica, basada en el software libre Scilab, la cual entre otras cosas permite realizar el acomodo de cargas teniendo en cuenta la instalación o no de un sistema fotovoltaico. Para comprobar su utilidad se toma como caso la UEB Pinturas Vitral ubicada en el municipio de San José de las Lajas, Provincia Mayabeque, Cuba, que posee 2 turnos de trabajo.

Abstract: At present, as energy resources are increasingly scarce, it is necessary to apply a highly efficient savings policy. In this context, it is essential to study and analyze electrical systems, mainly supply systems in production and service facilities. It is important to point out that in peak electricity hours, even the least efficient generating machines have to work, increasing oil consumption per kWh generated; on the other hand, there are great difficulties in transferring power from different generating units to the places where electricity is consumed in those critical hours. Therefore, when the energy demand is not in correspondence with the generation of the generating plants, it is then necessary to interrupt some loads, producing the well-known blackouts and, consequently, the inconvenience and affectations of the users of the electrical service, it is in these cases where the need for electric charge accommodation becomes evident. Therefore, this article aims to propose an application to accommodate loads in industrial systems, through a graphical interface, based on the free software Scilab, which among other things allows load accommodation considering the installation or not of a photovoltaic system. To verify its usefulness, the UEB Pinturas Vitral located in the municipality of San José de las Lajas, Mayabeque Province, Cuba, has 2 work shifts.

RESUMEN La conexión precalificada viga-columna es esencial para la resistencia sísmica de las estructuras, siendo fundamental en la formación tanto de estudiantes como de profesionales. Sin embargo, la limitada accesibilidad a costosos programas comerciales puede representar un desafío para muchos. En respuesta a esta problemática, surge CONEXIÓN RBS, un software libre que no solo ofrece una solución asequible, sino que también facilita el desarrollo de habilidades en el diseño de conexiones precalificadas a momento viga-columna con sección reducida RBS, conforme a la normativa ANSI / AISC 358 - 22. La interfaz gráfica amigable de CONEXIÓN RBS contribuye al aprendizaje intuitivo, permitiendo a los usuarios realizar cálculos y diseñar conexiones de manera automatizada. Este enfoque eficiente no solo minimiza el riesgo de errores derivados de cálculos manuales, sino que también agiliza el proceso, brindando a los usuarios la oportunidad de centrarse en comprender los conceptos y mejorar sus habilidades de diseño estructural. La inclusión de una memoria de cálculo en Smath Studio proporciona una herramienta valiosa para observar el paso a paso del diseño, enriqueciendo la comprensión del proceso. La comparación de los resultados de CONEXIÓN RBS con otros autores, con mínimas diferencias, valida la confiabilidad del software, respaldando su utilidad tanto en la práctica profesional como en el aprendizaje académico.

ABSTRACT The prequalified beam-column connection is essential for the seismic resistance of structures, being fundamental in the training of both students and professionals. However, the limited accessibility to expensive commercial software can be a challenge for many. In response to this problem, CONEXIÓN RBS, a free software that not only offers an affordable solution, but also facilitates the development of skills in the design of prequalified beam-column moment connections with reduced section RBS, according to ANSI / AISC 358 - 22. The user-friendly graphical interface of CONEXIÓN RBS contributes to intuitive learning, allowing users to perform calculations and design connections in an automated manner. This efficient approach not only minimizes the risk of errors arising from manual calculations, but also streamlines the process, giving users the opportunity to focus on understanding the concepts and improving their structural design skills. The inclusion of a calculation memory in Smath Studio provides a valuable tool for observing the design step-by-step, enriching the understanding of the process. The comparison of CONEXIÓN RBS results with other authors, with minimal differences, validates the reliability of the software, supporting its usefulness in both professional practice and academic learning.