Abstract The competitiveness of enterprises in the electromechanical systems engineering sector plays a crucial role in driving economic growth and innovation. This study aims to design a comprehensive index for evaluating enterprise competitiveness, focusing on operational efficiency, strategic positioning, and the international environment. Employing an exploratory factor analysis, data was collected through a questionnaire administered to 280 enterprises in Moscow, Russia. The proposed index allows for a dynamic assessment of competitiveness, enabling the analysis of key indicators over time and predicting changes in competitiveness. The findings reveal critical factors contributing to competitiveness in the sector, enabling decision-makers to formulate strategies for improving their competitive position. This research provides valuable insights for policymakers, industry practitioners, and academic researchers in enhancing the competitiveness of electromechanical systems engineering enterprises and fostering sustainable economic development. The study's contributions to the literature and its practical relevance make it a valuable resource for academic and industry audiences alike. innovation efficiency positioning environment 28 Moscow Russia decisionmakers decision makers position policymakers practitioners development studys s alike 2

Resumo A competitividade das empresas do setor de sistemas eletromecânicos de engenharia desempenha um papel fundamental na promoção do crescimento econômico e da inovação. O objetivo deste estudo é desenvolver um índice abrangente para avaliar a competitividade das empresas, com foco na eficiência operacional, posicionamento estratégico e o ambiente internacional. Empregando uma análise fatorial exploratória, os dados foram coletados por meio de um questionário aplicado a 280 empresas em Moscou, Rússia. O índice proposto permite uma avaliação dinâmica da competitividade, permitindo a análise de indicadores-chave ao longo do tempo e prevendo mudanças na competitividade. As conclusões revelam fatores críticos que contribuem para a competitividade no sector, permitindo aos decisores formular estratégias para melhorar a sua posição competitiva. Esta pesquisa fornece informações valiosas para formuladores de políticas, profissionais da indústria e pesquisadores acadêmicos no aumento da competitividade das empresas de sistemas eletromecânicos de engenharia e na promoção do desenvolvimento econômico sustentável. As contribuições do estudo para a literatura e sua relevância prática o tornam um recurso valioso para o público acadêmico e do setor. inovação operacional internacional exploratória 28 Moscou Rússia indicadoreschave indicadores chave sector competitiva políticas sustentável 2

This paper presents the stages of an acceleration program focused on chemical technologies. We demonstrate how this initiative contributes to the creation of new businesses, startups, and technology licensing from research developed at Brazilian universities. The case of the program Escale-se is discussed. There were 66 technologies submitted, and 14 were selected for the pre-acceleration phase. In this phase, various contents were worked on, such as creating a business model and aspects of scaling hard-science technologies. Teams were evaluated by panels with market specialists, and 6 were selected for the second phase: pre-scaling/proof of concept. Here, proponents were encouraged to validate the business model by connecting with potential clients and partners, as well as planning the development and testing of the product in a relevant environment. Finally, one team was classified for the last stage: scaling/go-to-market - where they received R$ 100,000.00 to scale up their technology and create strategies for raising investments. Four of the fourteen technologies selected for the program opened National Register of Legal Entities (CNPJ) and raised approximately R$ 4.5 M in investments from different sources. These results demonstrate that the methodology contributed to the entrepreneurial development of participating researchers and the raising of funds for the businesses created. startups universities Escalese Escale se discussed submitted 1 preacceleration pre phase hardscience hard science specialists prescaling/proof prescalingproof scaling/proof proof concept Here partners environment Finally stage scaling/gotomarket scalinggotomarket scaling/go go R 10000000 100 000 00 100,000.0 CNPJ (CNPJ 45 4 5 4. sources created prescaling scalingproof gotomarket scalinggo 1000000 10 0 100,000. 100000 100,000 10000 100,00 1000 100,0 100,

Abstract Choosing a university degree in Mexico is an important decision, especially if, upon completing high school, you wish to enter a Higher Education Institution. Indeed, private universities have assumed the responsibility of being competitive by offering professional training that allows effective job placement. That is why the present study was carried out in the City of Puebla Mexico, since it is one of the entities with the largest number of universities. A qualitative research was carried out, supported by an exploratory methodology, content analysis and digital positioning, including a search in different academic databases such as Scopus, Ebsco, Web of Science, among others. Among the results, it stands out that there are activities that favor brand positioning in private universities in Puebla through educational marketing; likewise, it was found that the actions that the different private higher education institutions have are numerous and seek to capture the attention of applicants and, finally, it was determined which of these actions represented favorable results in terms of improving perception and achieve improvement in their enrollment in an institution.

Resumen La elección de una carrera universitaria en México es una decisión importante sobre todo si al concluir los estudios de bachillerato se desea ingresar a una Institución de Educación Superior. En efecto, las universidades privadas han asumido la responsabilidad de ser competitivas al ofrecer una formación profesional que permita una inserción laboral efectiva. Es por ello que, el presente estudio se realizó en la Ciudad de Puebla México, ya que es una de las entidades con un mayor número de universidades. Se realizó una investigación de tipo cualitativa, sustentada bajo una metodología exploratoria, el análisis de contenido y posicionamiento digital incluyendo una búsqueda en diferentes bases de datos académicas tales como Scopus, Ebsco, Web of Science, entre otros. Entre los resultados se destaca que existen actividades que favorecen el posicionamiento de marca en universidades privadas de Puebla a través del marketing educativo; asimismo, se encontró que las acciones que tienen las diferentes instituciones de educación superior de carácter privado en son numerosas y buscan captar la atención de los aspirantes y, finalmente, se determinó cuáles de esas acciones representaron resultados favorables en cuestión de mejoramiento de la percepción y alcance la mejora en la inscripción del mismo en una institución.

Resumen Este estudio sobre migración latinoamericana asentada en la ciudad de Tijuana, México, pretende explorar, describir y analizar la influencia de la condición fronteriza en la creación, desarrollo y persistencia de un emergente empresariado étnico y sus respectivos negocios de y para inmigrantes de las periferias mundiales. Para ello, se propone una investigación etnográfica en cinco unidades de observación distribuidas en diversos puntos de la trama urbana fronteriza, pertenecientes a empresarios gastronómicos de tres grupos nacionales: hondureños, salvadoreños y venezolanos. La observación participativa se realiza como comensal y se instrumentan varias técnicas de conversación con los administradores de dichos restaurantes típicos. Finalmente, mediante un análisis interactivo se determina la presencia de sinergias entre los negocios de inmigrantes y la región fronteriza, la cuales facilitan la existencia de estos. El resultado en su conjunto supone un primer acercamiento al fenómeno, inédito en estudios previos en México.

Abstract This study on Latin American migration settled in the city of Tijuana, Mexico, aims to explore, describe and analyze the influence of the border condition in the creation, development and persistence of an emerging ethnic entrepreneurship and its respective businesses of and for immigrants from the global peripheries. To this end an ethnographic research is proposed in five observation units distributed in as various points of the border urban weave, belonging to gastronomic entrepreneurs from three national groups: Hondurans, Salvadorans, and Venezuelans. Participatory observation is carried out as a diner and several conversation techniques are implemented with the managers of these typical restaurants. Finally, through an interactive analysis, the presence of synergies between immigrant businesses and the border region is determined, which facilitate the existence of such businesses. The overall result is a first approach to the phenomenon, unpublished in previous studies in Mexico.

Abstract The research analyzes the variables that influence the strengthening of business and tax culture through knowledge management. Methodologically, it is a study with a qualitative and analytical approach. The study highlights the importance of knowledge management as a catalyst for improving organizational culture and tax compliance in companies. Variables such as effective communication allow the organization to improve tax and administrative management through the individual knowledge of each employee. The acquisition of skills and knowledge through training and education strengthens the resilience of individuals to regulatory changes. Technology, used as a management and process optimization tool, reduces error variability while increasing efficiency and performance. Teamwork in the execution of tasks facilitates more efficient planning and optimal allocation of individual responsibilities. Finally, by implementing a risk management approach, it is possible to exercise greater diligence in the early detection of errors and minimize their impact on the ongoing business development context.

Resumen La investigación analiza las variables que influyen en el fortalecimiento de la cultura empresarial y tributaria a través de la gestión del conocimiento. A nivel metodológico es un estudio con enfoque cualitativo y analítico. El estudio destaca la importancia de la gestión del conocimiento como un catalizador para mejorar la cultura organizacional y el cumplimiento tributario en las empresas. Variables como la comunicación efectiva, permite en la organización el mejoramiento en la gestión tributaria y administrativa por medio del conocimiento individual de cada trabajador; la adquisición de habilidades y conocimientos a través de la formación y capacitación fortalece la resiliencia de los individuos ante las modificaciones regulatorias; la tecnología, utilizada como un instrumento para la gestión y optimización de los procesos, reduce la variabilidad de errores, al tiempo que aumenta la eficiencia y el rendimiento; el trabajo en equipo en la ejecución de tareas facilita una planificación más eficiente y una asignación óptima de las responsabilidades individuales; y finalmente, mediante la implementación de un enfoque de gestión de riesgos, es posible ejercer una mayor diligencia en la detección temprana de fallos y en la minimización de su impacto en el contexto del desarrollo del negocio en marcha.

Abstract Business networks as an associative strategy represent an option to promote business development and growth, companies of the same turn join efforts and interests to create competitive advantages; through the transmission of knowledge among the members of the organizations their technical and management skills are improved. The objective of this quantitative, descriptive and transactional research is to analyze the conditions and characteristics of the artisans of the Mixteca Oaxaqueña region to integrate a business network; and investigate the appropriate methodology for their integration. The case study method was applied to study the problem in depth. The results indicate that the creation of a business network among the artisans of the Mixteca Oaxaqueña region will promote greater collaboration and joint promotion, which will allow them to enter potential markets with greater competitiveness. The skills and competences they demonstrate to produce a wide range of artisanal products will allow them, together, to attract a greater number of customers and contribute to the generation of economies of scale. In the integration of the business network, five phases were proposed: network identification; trust relationships; monitoring, evaluation and autonomous management; strategic planning; and the pilot project.

Resumen Las redes empresariales como estrategia asociativa representan una opción para promover el desarrollo y crecimiento empresarial, donde empresas del mismo giro unen esfuerzos e intereses para crear ventajas competitivas; mediante la transmisión de conocimientos entre los integrantes se mejoran sus habilidades técnicas y de gestión. El objetivo de esta investigación cuantitativa, descriptiva y transeccional consiste en analizar las condiciones y características de los artesanos de la región Mixteca Oaxaqueña para integrar una red empresarial; e investigar la metodología apropiada para su integración. Se aplicó el método estudio de caso, para estudiar a profundidad la problemática. Los resultados indican que la creación de una red empresarial entre los artesanos de la región Mixteca Oaxaqueña impulsará una mayor colaboración y promoción conjunta, que les permitirá incursionar en mercados potenciales con una mayor competitividad. Las habilidades y competencias que manifiestan para la producción de una gran diversidad de artesanías les permitirá en conjunto, captar un mayor número de clientes y contribuir en la generación de economías de escala. En la integración de la red empresarial se propusieron cinco fases: identificación de la red; relaciones de confianza; monitoreo, evaluación y gestión autónoma; planificación estratégica; y el proyecto piloto.

RESUMEN Se entiende como calidad del trabajo intrínseco a variables como: el grado de autonomía, la variedad y complejidad de las tareas, el uso de habilidades y la posibilidad de desarrollo profesional en el trabajo. En tanto que, las perspectivas futuras abordan la percepción de los trabajadores sobre su futuro laboral, incluyendo aspectos como las oportunidades de progreso profesional, la seguridad en el empleo y la satisfacción laboral. La presente investigación tiene como objetivo analizar la importancia de las variables asociadas a la calidad intrínseca del trabajo y las perspectivas futuras en relación con el estrés experimentado por los trabajadores autónomos en Ecuador. Se aplicó un enfoque cuantitativo mediante regresión logística a datos de una muestra de 1055 trabajadores de la provincia de Manabí, utilizando la Encuesta Europea sobre Condiciones de Trabajo (EWCS) 2015. Se encontró que una evaluación positiva del trabajo propio está asociada con mayor estrés, mientras resolver problemas imprevistos personalmente se relaciona con menos estrés. Además, realizar tareas complejas y ofrecer formación pagada externa o en el lugar de trabajo aumenta la probabilidad de estrés. Por otro lado, menor satisfacción en el trabajo, disfrutar ser el propio jefe, dificultades para manejar el negocio, facilidad para encontrar nuevos clientes y la percepción de que el trabajo afecta la salud también están vinculados con mayor estrés. Estos hallazgos destacan la importancia de gestionar el trabajo y el entorno laboral para mejorar el bienestar de los trabajadores autónomos.

ABSTRACT Intrinsic job quality is understood in terms of variables such as: the degree of autonomy, the variety and complexity of tasks, the use of skills, and the possibility of professional development at work. Meanwhile, future prospects address workers' perceptions of their career future, including aspects such as opportunities for professional advancement, job security, and job satisfaction. This research aims to analyze the importance of variables associated with intrinsic job quality and future prospects in relation to the stress experienced by self-employed workers in Ecuador. A quantitative approach was applied using logistic regression to data from a sample of 1055 workers in the province of Manabí, utilizing the 2015 European Working Conditions Survey (EWCS). It was found that a positive assessment of one's own work is associated with higher stress, while personally resolving unforeseen problems is related to lower stress. Additionally, performing complex tasks and providing paid external or on-the-job training increases the likelihood of stress. On the other hand, lower job satisfaction, enjoying being one's own boss, difficulties in managing the business, ease in finding new clients, and the perception that work affects health are also linked to higher stress. These findings underscore the importance of managing work and the work environment to improve the well-being of self-employed workers.

Abstract Promoting transparency is seen as one of the key mechanisms for generating trust in the work of journalists and thereby strengthening democracies. The principle is that making information about media ownership, funding, and editorial decision-making criteria public enhances understanding of the less visible aspects of journalistic production, thus increasing credibility by identifying potential conflicts of interest. In recent years, technological development, particularly the internet’s growing capabilities, coupled with the crisis in journalism’s business models, which is jeopardising traditional funding models, has led to the emergence of entrepreneurial journalistic projects that claim to be alternative and independent. These projects seek to distinguish themselves from mainstream journalism through their structure, funding and ownership models, and they find a strategy for promoting transparency that sets them apart from traditional media. This article aims to identify and analyse the transparency promotion practices of these journalistic projects, relating them to a strategy of affirmation in the news market.

Resumo A promoção da transparência é vista como um dos mecanismos para gerar confiança no trabalho dos jornalistas e, por essa via, fortalecer as democracias. O princípio é o de que tornar públicas as informações sobre a propriedade dos meios de comunicação jornalísticos, o seu financiamento e os critérios gerais que suportam as suas decisões editoriais contribui para o conhecimento sobre o lado menos visível da produção jornalística e, assim, credibilizar o jornalismo, identificando eventuais pontos de conflito. Nos últimos anos, o desenvolvimento tecnológico, em particular com o aumento das potencialidades da internet, a par da crise dos modelos de negócio do jornalismo, que coloca em causa modelos tradicionais de financiamento, tem motivado o aparecimento de projetos jornalísticos empreendedores que se afirmam como alternativos e independentes. Estes projetos procuram distanciar-se do jornalismo tradicional no que diz respeito à sua estrutura, modelos de financiamento e de propriedade e encontram na promoção da transparência uma estratégia que os distingue dos média tradicionais. O presente artigo pretende identificar e estudar as práticas de promoção da transparência destes projetos jornalísticos, relacionando-as com uma estratégia de afirmação no mercado das notícias.

RESUMEN Se estudia la incidencia de la pandemia, generada por el virus del Covid-19 sobre el emprendimiento en el departamento de Santander; Colombia, utilizando los datos de la Encuesta de Micronegocios (EMICRON) del DANE durante el periodo de 2019 a 2022. Para ello, se describen las características del emprendimiento antes, durante y después la crisis por Covid-19, y se analiza la probabilidad de ser un emprendimiento consolidado en Santander según factores internos y externos de la unidad de negocio. Los resultados indican que los micronegocios en Santander tienen capacidad de adaptación y crecimiento, superando los desafíos impuestos por la pandemia de Covid-19. Sin embargo, persisten desafíos en términos de financiamiento y formalización que deben ser abordados para asegurar un desarrollo sostenible y robusto en el futuro. CLASIFICACIÓN JEL: L26, R11, R58

RESUMO Estudamos a incidência da pandemia, gerada pelo vírus Covid-19, sobre o empreendedorismo no departamento de Santander Colômbia, usando dados da Pesquisa de Microempresas (EMICRON) do DANE durante o período de 2019 a 2022. Para isso, descrevemos as características do empreendedorismo antes, durante e após a crise da Covid-19 e analisamos a probabilidade de ser um empreendedor consolidado em Santander de acordo com fatores internos e externos da unidade de negócios. Os resultados indicam que as microempresas do Santander têm a capacidade de se adaptar e crescer; superando os desafios impostos pela pandemia da Covid-19. No entanto, ainda há desafios em termos de financiamento e formalização que precisam ser abordados para garantir um desenvolvimento sustentável e robusto no futuro. CLASSIFICAÇÃO JEL: L26, R11, R58

ABSTRACT This paper studies the incidence of the pandemic generated by the COVID-19 virus on entrepreneurship in the department of Santander, Colombia, using data from the Microbusiness Survey (EMICRON) of DANE from 2019 to 2022. For this purpose, the characteristics of entrepreneurship before, during, and after the crisis of Covid-19 are described, and the probability of being a consolidated entrepreneur in Santander is analyzed according to internal and external factors of the business unit. The results indicate that micro-businesses in Santander can adapt and grow, overcoming the challenges imposed by the COVID-19 pandemic. However, challenges persist in financing and formalization that must be addressed to ensure sustainable and robust development in the future. JEL CLASSIFICATION: L26, R11, R58

Abstract: The objective of this study is to assess the association between the levels of reading comprehension, well-being, motivation, and academic performance. A quantitative approach of descriptive and correlational scope is applied through a cross-sectional design that evaluates, from an expository-argumentative text, the reading comprehension of a sample of business engineering students from a traditional university located in South-Central Chile. The results show that literal comprehension is completely achieved by 77.55% of the students, as well as the inferential level. However, in the organizational, critical, and appreciative areas, none of the students achieve the desired maximum. A weak and significant correlation is observed between the mood of the participants and the literal and inferential domains. It is concluded that the appreciative level of reading could have an impact on student university academic performance.

Resumen: El objetivo de este estudio es analizar la asociación entre los niveles de comprensión lectora, el bienestar, la motivación y el rendimiento académico. Se aplica un enfoque cuantitativo de alcance descriptivo y correlacional, a través de un diseño de corte transversal que evalúa a partir de un texto expositivo-argumentativo la comprensión lectora de una muestra de estudiantes de ingeniería comercial de una universidad tradicional del centro sur de Chile. Los resultados muestran que la comprensión literal es completamente lograda por el 77.55% de los estudiantes, así como el nivel inferencial. No obstante, en los ámbitos organizacionales, crítico y apreciativo ninguno logra el máximo deseado. Se observa una correlación débil y significativa entre el estado de ánimo de los participantes y el dominio literal e inferencial. Se concluye que el nivel apreciativo de lectura podría tener incidencia en el rendimiento académico universitario de los estudiantes.

There is widespread agreement that skills development is a vital dimension of the just energy transition (JET). Skills development for JET is rapidly emerging and involves complex inter-sectoral systems of skills development and new methods for demand analysis. Currently in South Africa, learning pathways into green jobs, enterprise development and more sustainable job options, including those required for JET at entry and technical levels, are unclear, ad hoc and fragmented. At best, we have fragmented offerings of courses and qualifications and few systemic approaches to skills analysis and development. There is also a narrow reliance on supply and demand discourses that are ill-fitting for the type of skills that need to be developed. Drawing on a group of regional and local studies focusing on skills supply and demand for JET, the paper analyses the responsiveness of skills systems, with specific focus on institutions and institutional arrangements that underpin skills planning and anticipation. The paper critiques the metaphor of 'supply' and 'demand', which, it argues, is the wrong lens, as it focuses attention on certain parts of the skills system dislocated from the broader conditions that they are imbedded in. We pose new methodological questions for engaged skills research that can enable a green and just future, and the systemic transformations that are needed to catalyse a low-carbon transition. SIGNIFICANCE: The research findings offer a critical reflection on the current approach to research focused on skills for the just energy transition. The review highlights the limitations of the dominant supply-demand approach of skills analysis, and we argue that it promotes a neoliberal, market-led discourse on skills that privileges industry and excludes the voices of communities and workers.

RESUMEN Este estudio tiene como objetivo verificar cómo ha sido la implementación de conceptos básicos sobre las metas establecidas al 2030 y cómo los estudiantes de barrios de la periferia de Río de Janeiro están construyendo su propia percepción sobre los Objetivos de Desarrollo Sostenible (ODS). El artículo es necesario dado que la responsabilidad social y la ética empresarial se basan en una educación alineada con la sostenibilidad. Este estudio es de naturaleza exploratoria y cualitativa. El estudio mostró un alineamiento respecto a la necesidad de repensar las estrategias de enseñanza para trabajar el tema en el aula. Al comparar el desarrollo de los estudiantes de barrios dentro de una misma ciudad, queda claro que los de esta región están menos afectados, dada esta descontextualización de los ODS con la vida de los estudiantes. Es necesario monitorear la construcción de la ciencia sobre este tema urgente. Se concluye que los ODS deben ser debatidos con mayor regularidad en las escuelas para mejorar e incluso incentivar a los docentes a involucrarse con los objetivos, además de incluirse en el currículo escolar de manera integrada con otros agentes sociales, preferiblemente con el apoyo de personas comprometidas. programas para lograr los objetivos de la agenda 2030.

ABSTRACT This study aims to verify how the implementation of basic concepts about the goals established by 2030 has been and how students from neighborhoods on the outskirts of Rio de Janeiro are building their own perception of the Sustainable Development Goals (SDGs). The article is necessary given that social responsibility and business ethics are based on education aligned with sustainability. This study is exploratory and qualitative in nature. The study showed an alignment regarding the need to rethink teaching strategies to work on the topic in the classroom. When comparing the development of students from neighborhoods within the same city, it is clear that those from this region are less touched, given this decontextualization of the SDGs with the lives of students. It is necessary to monitor the construction of science on this urgent topic. It is concluded that the SDGs must be debated more regularly in schools to improve and even encourage teachers to get involved with the goals, in addition to being included in the school curriculum in an integrated way with other social agents, preferably with the support of committed programs in achieving the goals of the 2030 agenda.

RESUMO Este estudo tem como objetivo verificar como tem sido a implementação de conceitos básicos sobre as metas estabelecidas até 2030 e como os alunos de um bairro da periferia do Rio de Janeiro estão construindo sua própria percepção dos Objetivos de Desenvolvimento Sustentável (ODS). O artigo se faz necessário dado que a responsabilidade social e ética empresarial estão alicerçadas por uma educação alinhada ao olhar da sustentabilidade. Esse estudo é exploratório e de natureza qualitativa. O estudo evidenciou um alinhamento quanto à necessidade de repensar estratégias didáticas para trabalhar a temática na sala de aula. Ao comparar o conhecimento acerca dos ODS dos alunos de diferentes bairros dentro da mesma cidade, percebe-se que os mais afastados do centro estão menos emergentes, dada essa descontextualização dos ODS com a vida dos discentes. É necessário um maior debate dentro e fora das salas de aula, para uma construção da ciência acerca dos ODS, cuja temática é urgente. Conclui-se que os ODS devem ser debatidos com mais regularidade nas escolas para sanar e até incentivar os docentes a se envolverem com as metas, além de inseridos no currículo escolar de forma integrada a outros agentes sociais, de preferência com o apoio de programas compromissados em atingir as metas da agenda 2030.

Resumen: El comercio electrónico del sector de la moda ha aumentado en los últimos años en Latinoamérica, especialmente a raíz de la pandemia, sin embargo, todavía existen problemas en la aceptación de este canal de compra. La presente investigación se centra en algunos factores que podrían influir en la intención de compra y tiene como objetivos comprobar cómo en ella influyen la confianza, los riesgos percibidos, los costos y la conveniencia. Para esto, se suministró un cuestionario a 223 estudiantes de cuatro universidades del Ecuador. Para el análisis de los datos obtenidos se desarrolló un modelo PLS-SEM, en el cual la confianza en el vendedor actúa como variable mediadora en la relación entre los otros tres factores y la intención de compra. Los resultados muestran que dicho modelo tiene un aceptable poder predictivo y explicativo. Asimismo, se comprueba que los riesgos, la conveniencia y la confianza afectan significativamente a la intención de compra, pero no los costos. Además, la confianza mediaría la relación entre las tres variables y la intención de compra en línea. Se concluye que el modelo propuesto puede servir de base para estudios similares y, a su vez, se considera que los resultados obtenidos pueden ser utilizados por las empresas en el sector de la moda que quieren vender a través de plataformas de e-Commerce para el desarrollo de estrategias de marketing.

Abstract: E-commerce in the fashion sector has increased in recent years in Latin America, especially in the wake of the pandemic, however, there are still issues in the acceptance of this shopping channel. The present research focuses on some factors that could influence purchase intention and aims to test how it is influenced by trust, perceived risks, costs and convenience. For this purpose, a questionnaire was given to 223 students from four universities in Ecuador. A PLS-SEM model was developed for the analysis of the data, in which trust in the seller has a mediating role in the relationship between the other three factors and purchase intention. Results show that this model has acceptable predictive and explanatory power. Likewise, it validates that risks, convenience and trust significantly affect intention, but not costs. In addition, trust would mediate the relationship between the other variables and online shopping intention. It is concluded that the proposed model can serve as a basis for similar studies, and, at the same time, it is considered that the results obtained can be used by business in the fashion sector that pursue to sell through e-commerce platforms for marketing strategies development.

Resumen La investigación tiene como objetivo la elaboración de un modelo agrometeorológico de pronóstico del rendimiento agrícola azucarero. Se tomaron los rendimientos por cepas y totales, área de cada cepa y total, y edad de la plantación de 13 Unidades Empresariales de Base de las provincias Cienfuegos, Sancti Spíritus y Ciego de Ávila en el período 1980-2015; así como, registros mensuales de precipitación, temperatura media y evapotranspiración de siete estaciones meteorológicas. Se calculó el Índice Potencial Productivo según la fase fenológica en la que se encuentre para comprobar su grado de efectividad. Para el procesamiento estadístico se utilizó el tabulador Excel, STATISTICA versión 8.0.5 y el módulo matemático SciPy. La efectividad de las estimaciones de rendimiento agrícola obtenidas con el modelo presentado para las zafras 2011 - 2015, se comparó usando el coeficiente de determinación R2, analizando la relación establecida entre las variables regresoras y el predictando. El modelo de regresión lineal múltiple permite realizar pronósticos de rendimiento agrícola con precisión y ajuste, en dependencia de los escenarios comerciales concretos de la producción cañera del país. La provincia Ciego de Ávila revela, de las tres en estudio, el mayor grado de efectividad en la estimación del rendimiento agrícola de la caña de azúcar.

Abstract The objective of the research is the development of an agrometeorological model for forecasting sugar agricultural yield. The yields by strains and totals, area of each strain and total, and age of the plantation were taken from 13 Management Business Units in the Cienfuegos, Sancti Spíritus and Ciego de Ávila provinces in the period 1980-2015; as well as monthly records of precipitation, average temperature and evapotranspiration from seven meteorological stations. The Productive Potential Index was calculated according to the phenological phase in which it is found to verify its degree of effectiveness. For statistical processing, the Excel tabulator, STATISTICA version 8.0.5 and the SciPy mathematical module were used. The effectiveness of the agricultural yield estimates obtained with the model presented for the 2011 - 2015 harvests was compared using the coefficient of determination R2, analyzing the relationship established between the regressor variables and the predictand. The multiple linear regression model allows agricultural performance forecasts to be made with precision and adjustment, depending on the specific commercial scenarios of the country's sugarcane production. The province of Ciego de Ávila reveals, of the three under study, the highest degree of effectiveness in estimating the agricultural yield of sugar cane.

ABSTRACT This study analyzed a recently developed bone substitute biomaterial made of chitosan-xanthanhydroxyapatite- graphene oxide (CXHAG). The CXHAG particles underwent in vitro structural and morphological characterization, and in vivo testing with or without osteogenic conditioned medium from mesenchymal stem cells. Aim The aim of this study was to determine whether the CXHAG novel biomaterial, supplemented with conditioned medium from mesenchymal stem cells, could be useful for bone regeneration. Materials and Method For the in vitro study, cells were incubated with 20mg of CXHAG granules for 24 hours and a MTT assay was performed to tests for cytotoxicity. For the in vivo study, critical size calvarial bone defects were created in twenty-five rats. One animal had the defect unfilled (Control Group–CG) and was euthanized after 42 days. Twelve rats received the CXHAG particles (Group 1–G1) and the other twelve received the CXHAG particles supplemented with the conditioned medium (Group 2–G2). All G1/G2 grafts were covered with a CXHAG membrane. G1/G2 animals were euthanized after 14 days (T1) or 42 days (T2). The specimens were processed and histologically evaluated. Results SEM analysis of the CXHAG particles showed granules of 300-400μm, with a rough irregular surface. They were not cytotoxic to dental pulp stem cells in vitro. The CG specimen showed loose immature connective tissue and no bone formation at the center of the defect. G1 and G2 presented remnant biomaterial particles at both time points, but only G2 had bone formation at the center of the defect. Conclusions The conditioned medium had a positive effect on bone regeneration in rat calvarial critical size defects when associated with the novel bone substitute biomaterial.

RESUMO Este estudo analisou um biomaterial substituto ósseo recentemente desenvolvido feito de óxido de quitosana- xantana-hidroxiapatita-grafeno (CXHAG). As partículas CXHAG observaram caracterização estrutural e morfológica in vitro. Foi testado in vivo, com ou sem meio condicionado osteogênico de células-tronco mesenquimais. Objetivo O objetivo deste estudo foi determinar se o novo biomaterial CXHAG, suplementado com meio condicionado de células-tronco mesenquimais, poderia ser útil para a regeneração óssea. Materiais e Método Para o estudo in vitro, as células foram incubadas com 20mg de grânulos de CXHAG por 24 horas e foi realizado ensaio de MTT para verificar a citotoxicidade. Para o estudo in vivo, foram criados defeitos ósseos de tamanho crítico na calvária em vinte e cinco ratos. Um animal teve o defeito não preenchido (Grupo Controle – GC) e foi eutanasiado após 42 dias. Doze ratos receberam as partículas CXHAG (Grupo 1 – G1) e os outros doze receberam as partículas CXHAG suplementadas com o meio condicionado (Grupo 2 – G2). Todos os enxertos G1/G2 foram cobertos com membrana CXHAG. Os animais do G1/G2 foram eutanasiados após 14 dias (T1) ou 42 dias (T2). Os espécimes foram processados e avaliados histologicamente. Resultados A análise SEM das partículas CXHAG mostrou grânulos de 300-400μm, com superfície áspera e irregular. Eles não foram citotóxicos para células-tronco da polpa dentária in vitro. As amostras CG mostraram tecido conjuntivo imaturo frouxo e nenhuma formação óssea no centro do defeito. G1 e G2 apresentaram partículas remanescentes de biomateriais em ambos os momentos, mas apenas G2 apresentou formação óssea no centro do defeito. Conclusões O meio condicionado teve repercussões positivas na regeneração óssea em defeitos críticos de calvária de ratos quando associado ao novo biomaterial substituto ósseo.