This work presents the results of the continuity of the research process carried out in the Energy Studies Center belonging to the Faculty of Technical Sciences of the University of Matanzas, which involves the establishment of a dimensionless model to determine the average condensation heat transfer coefficient of Air Coleed Condenser (ACC) systems in straight and inclined tubes. The research consists in obtaining in an analytical way the solution of the differential equation of the velocity profile, considering that condensation is of pellicular type, finally the empirical condition of Roshenow is combined with the theoretical solution to generate a numerical expression that allows obtaining with a 15.2% of deviation in 2,192 tests, a value of the average coefficient of heat transfer by condensation very similar to the one obtained with the use of the most referenced model in the consulted literature, the empirical model of Chato.

Under the interactive influence of multiple factors, there are significant differences in the support of citizens for Hangzhou's Song rhyme culture. Therefore, in this section, we will consider factors such as repetition and similarity in nature, and investigate the correlation between age and the support of Song rhyme culture.

Training is an important content of enterprise human resource management, which is a purposeful, planned and step-by-step learning, its goal is to enable managers to master specific professional knowledge, working methods, skills, and improve their working attitudes and values, so that the potential of managers can be fully exerted, so that the performance of individuals and enterprises can be improved, and promote the development of individuals and organizations. For grassroots managers, as the front-line managers of the enterprise, about 60% of their employees are directly managed by them. One of the important bases for leaders to support training is the training program, how to write an attractive training program is a mandatory topic for every human resource management, this article will be from the training theme extraction, program logic concept, training safeguard measures several aspects to discuss, in order to enlighten the reader.

This article measures the performance of listed commercial banks in Vietnam and identifies factors influencing their efficiency. The study follows a two-stage approach: (i) In the first stage, scale efficiency scores from 2016 to 2022 are assessed using the Data Envelopment Analysis (DEA) method; (ii) In the second stage, Tobit regression analyzes internal factors, macroeconomic conditions, and the impact of Covid-19. Key findings show that internal factors such as return on assets positively affect efficiency, while the ratio of equity to total capital has a negative and statistically significant impact. Bank size positively influences efficiency scores. Macroeconomic factors, including economic growth and inflation, were statistically insignificant. However, the Covid-19 pandemic had a significant negative effect on bank efficiency.