The Instituto Tecnológico de Oaxaca (ITO) (English: Oaxaca Institute of Technology) is a public institution of higher education located in Oaxaca de Juárez, Oaxaca, Mexico. It was established in April 1968.The university offers ten undergraduate degree programs and six graduate level programs. ITO is part of the Directorate General of Higher Education Technology (DGEST) of the Secretariat of Public Education of Mexico.
The aim of this research is to develop a preliminary causal loop diagram (PCLD) of the tacit knowledge (TK) provisioning in a firm, from the knowledge-based human resource management (KB-HRM) perspective, which facilitates understanding phenomenon dynamics for designing strategies that ensure attraction, retention, and exploitation of TK. This research is qualitative and exploratory, conducted in two phases. In the first phase, we identified variables and KB-HRM processes involved by reviewing relevant documents from Web of Science to create a PCLD. The second phase involves designing this diagram. Findings suggest positive and negative interactions that favour and disfavour TK provisioning. Thus, organisational innovation is essential, requiring knowledge, particularly TK, and indispensable HR participation, as they possess and generate this knowledge. The diagram’s novelty is based on causality between twenty-three variables, grouped into three systems: (S1) acquisition of new TK, (S2) acquisition of existing TK, and (S3) loss of TK; and six KB-HRM-related processes. Therefore, PCLD presents the first step towards understanding TK provisioning complexity, as knowing TK inflows and outflows is crucial for firms to make better decisions and formulating strategies related to TK acquisition and retention.
High-entropy alloys (HEAs) are a transformative class of materials with remarkable structural and functional properties. Solid-state processing techniques, such as high-energy ball milling, are being increasingly used for their production. In these processes, the use of a process control agent (PCA) seems to be essential to prevent excessive cold welding and agglomeration; however, the influence of different PCAs on alloy formation remains insufficiently understood. This study systematically examined the effects of the PCA type, milling configuration, and elemental substitution on HEAs mechanosynthesis. A non-equiatomic alloy, Al10Cr12Fe35Mn23Ni20 (selected for its known single-phase Face Center Cubic (FCC) behavior), was used to explore the PCA and mill-type effects. The alloy was synthesized in a planetary mill (Fritsch Pulverisette 7) and a vibratory mill (SPEX 8000M) using diverse PCAs, including liquid (methanol, ethanol, isopropyl, and n-heptane) and solid (stearic acid and sodium chloride) agents. In addition, lightweight equiatomic alloys MgAlTiNi(Co,Cr,Fe) were used to explore the influence of different PCAs and the effect of elemental substitution under similar PCA conditions as those used with the equiatomic alloy. The products were characterized using X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and differential thermal analysis techniques. The results highlighted that the PCA selection, milling configuration, and alloy chemistry influenced the phase evolution, particle size distribution, and thermal behavior. The results provide insights into the mechanosynthesis of selected high-entropy alloys produced under different PCA and milling conditions.
Renewable energy plays a crucial role in mitigating environmental impact and reducing dependence on fossil fuels. Solar thermal energy offers a clean and sustainable alternative. This study presents a phenomenological mathematical model for simulating heat transfer in a flat-plate solar collector. The model aims to optimize thermal efficiency and support the design of energy systems. The thermal analysis considers temperature gradients across the glass cover (GC), the air gap between the GC and the absorber plate (GC-AP), the aluminum absorber plate (AP), the airflow inside the tubes, and the wood insulation (WI) at the base. A thermal resistance network is developed that incorporates conduction, convection, and radiation mechanisms. Heat transfer coefficients are obtained from experimental measurements of temperature and air velocity, including ambient, GC, AP, insulation, and working fluid temperatures. These coefficients feed an energy balance model, producing differential equations that are solved numerically using Scilab Xcos to simulate the collector’s behavior. The GC acts as a selective filter, transmitting short-wave radiation and limiting long-wave emissions, contributing to a greenhouse effect that enhances performance. However, significant thermal losses occur through insulation and optical elements. Model validation against experimental data yields RMSE of 0.19 °C for natural convection and 0.0089 °C for forced convection. The thermal efficiency of 52.7% under forced convection and 29.3% under natural convection. Total energy losses amount to 35% via insulation and 15% due to optical inefficiencies. The results highlight the critical role of airflow and the importance of improving optical properties and insulation to enhance collector performance.
En México, la educación ambiental ha transitado de enfoques centrados en sensibilización hacia marcos más integrados con sostenibilidad, competencias y participación social, aunque con avances desiguales entre niveles educativos y regiones. Este artículo revisa literatura académica publicada entre 2010 y 2025 sobre educación ambiental y sostenibilidad en México, con énfasis en ambientalización curricular, pedagogías situadas, aprendizaje experiencial y gobernanza escolar/comunitaria. Se realizó una revisión literaria guiada por criterios PRISMA 2020 y una síntesis temática cualitativa. Los hallazgos sugieren tres tendencias: (1) fortalecimiento del discurso curricular en educación superior, (2) expansión de estrategias didácticas participativas y basadas en experiencias, y (3) desplazamiento hacia competencias para la sostenibilidad y enfoques socioambientales. Se discuten tensiones persistentes entre retórica institucional y capacidades de implementación, así como una agenda de investigación orientada a evaluación de resultados, justicia socioambiental y escalamiento territorial.
El documento analiza el papel de la mercadotecnia en el fortalecimiento del emprendimiento comunitario dentro de la producción artesanal de madera en San Juan del Estado, Etla, Oaxaca, desde un enfoque de desarrollo sostenible. A partir de una metodología cualitativa que incluye entrevistas, observación directa y análisis documental, se identifican las principales dinámicas productivas, organizativas y comerciales del sector. Los resultados muestran que esta actividad tiene gran relevancia económica, social y cultural, ya que genera ingresos y preserva saberes tradicionales; sin embargo, enfrenta limitaciones importantes como la ausencia de estrategias de mercadotecnia, la débil organización colectiva y la baja creación de valor económico. Estas condiciones provocan que los productos compitan principalmente por precio y no por su valor cultural o simbólico. El marco teórico integra conceptos de desarrollo sostenible, emprendimiento comunitario y mercadotecnia comunitaria, destacando que esta última puede ser una herramienta clave para visibilizar los atributos culturales de los productos, mejorar su posicionamiento y facilitar el acceso a mercados más amplios. En conclusión, el estudio demuestra que la incorporación de estrategias de mercadotecnia comunitaria puede fortalecer el emprendimiento local, mejorar la competitividad y contribuir a la sostenibilidad económica, social y cultural, en concordancia con los Objetivos de Desarrollo Sostenible de la Agenda 2030.
