In this study, the surface of aerosil OX50 was treated with γ-methacryloxypropyltrimethoxysilane in order to evaluate its effect on light-cured dental composites. Four composites were prepared with Bis-GMA/tetraethylene glycol dimethacrylate/γ-methacryloxypropyltrimethoxysilane, Bis-GMA/tetraethylene glycol dimethacrylate, and a 45% treated or untreated aerosil OX50, using the camphorquinone/N,N-dimethylaminoethyl methacrylate pair as initiator. Evidence of filler silanization was provided by FTIR as a low-intensity absorption at 1707 cm⁻¹ (carbonyl functional group) while thermogravimetric analysis showed a mass loss of approximately 2% associated with the decomposition of γ-methacryloxypropyltrimethoxysilane. The experimental composites studied meet the requirements of the ISO 4049:2019 standard for depth of cure, water sorption, and solubility. The composites are shown to be thermally stable and presented a degree of conversion higher than 70%, being higher than that reported for many commercial composites. Based on the observed properties, the best formulations were those in which the silane is incorporated into the matrix and the filler was previously treated.

Objetivo: En un entorno de creciente incertidumbre para el sector minero global, este estudio buscó establecer un procedimiento de vigilancia e inteligencia organizacional para el fomento de la anticipación estratégica y la sostenibilidad en la Empresa Geominera Centro en Cuba. Métodos: Se empleó un enfoque mixto, con un muestreo de 25 expertos clave de la empresa. El diagnóstico se realizó aplicando una lista de chequeo basada en la norma UNE 166006:2018, y sus hallazgos se sintetizaron en una matriz que integró factores internos y externos para fundamentar el diseño del procedimiento. Resultados: El diagnóstico inicial reveló un bajo nivel de cumplimiento en áreas como la identificación de fuentes (28.6%) y la sistematización de resultados, confirmando la ausencia de un inventario formal de fuentes. La implementación piloto en el proyecto "Dolomita" condujo a acciones directas como la solicitud de rediseño de su cronograma por la Dirección Técnica y la gestión de ofertas con nuevos proveedores tecnológicos. Conclusión: Se demostró que la implementación de un procedimiento de vigilancia e inteligencia organizacional es una herramienta clave para cerrar la brecha entre la literatura científica y la realidad operativa. Su integración con el sistema de gestión de la calidad potencia la efectividad y sostenibilidad del procedimiento, aunque se reconoce como desafío clave la superación de la dependencia de procesos manuales mediante la adopción de software especializado.

The aeronautical sector confronts unprecedented challenges to mitigate its environmental impact amid accelerated climate change and stringent regulations. This study’s objective was to design and apply a methodology for evaluating environmental performance at the Cuban Air Navigation Company through a mixed-methods case study. Based on ISO 14001 and 14031 standards, the methodology's design integrated systematic literature review and documentary analysis and was validated using inductive-deductive and systemic approaches. The results, based on three premises and six key indicators, revealed high compliance in environmental objectives (92.3%) and waste management (102%). However, the evaluation also highlighted key areas for improvement, such as electromobility strategies (70% compliance) and the environmental training plan (83.6% compliance). The resulting framework not only enables monitoring environmental practices to ensure regulatory compliance but also serves as a strategic tool for advancing sustainability and driving continuous management improvement.