La pandemia por COVID-19, evidenció la situación que se encuentra la educación en Perú, por más de 2 años se notó la carencia de dispositivos tecnológicos y que al continuar con las clases progresivas no acataron adecuadamente las medidas de prevención. La finalidad del estudio fue demostrar cómo influyen las medidas de prevención en el retorno a las clases presenciales. Se empleó el diseño descriptivo comparativo transversal, técnicas de observación y encuesta y método mixto. La muestra fue de 30 alumnos evaluados en dos grupos. Los resultados determinaron que el 90 % asistió a clase en la tercera semana, la cuarta semana el 73 % no cumple adecuadamente las medidas de prevención y el 90 % obtuvo dispositivos tecnológicos para la clase virtual. Se concluye que, hubo incremento del retorno a las clases presenciales; sin embargo, es necesario tener en cuenta acatar las medidas de prevención para reducir el contagio.

Todos los capítulos de este libro fueron evaluados por pares académicos externos a la entidad editora. Tipo de revisión: doble ciego.

Technological progress has transcended communication, immediacy, sending audiovisual and written materials, interaction and interactivity anywhere in the world. Reason, that the efficiency of WhatsApp for learning in higher education was investigated. The objective was to determine if there is a correlation between the usefulness of the application and the improvement of learning. The methodology is based on descriptive, the representative sample was 20 students; For this reason, the questionnaires were elaborated. How often do you review the messages of this application during the day? Is the reception and storage of educational materials of the application efficient? Is it effective in sending and receiving the link of the virtual platforms through WhatsApp? Does your rating improve due to the availability of educational materials for use per month? Do you consider the tool useful for evaluations in each module? and Does it improve learning by using WhatsApp as an interactive and indispensable tool per month? Once the data was obtained, it was processed using basic statistics and correlation. The results determined that the moment the application is reviewed was 35%, reviews 4 to 7 times a day, efficiency in sending and receiving materials 80%, efficiency in sending and receiving links with 75%, improves qualifications when using WhatsApp with 45% improved a rating of 15, considers it useful for evaluations with 90% considers it useful, improves learning its use with 85% and correlation between considers WhatsApp useful and improvement of learning with r = 0.973. It concludes that there is a high correlation between considering WhatsApp useful and learning improvement, which means that the use of this tool influences the improvement of learning, however it is necessary to take into account that it is used for academic purposes.

The rise in food, decrease in jobs have affected economic progress. For this reason, research was carried out on the use of market waste for the benefit of the community. The objective was to determine the quantification and chemical characterization for the benefit of the community. It is based on descriptive methodology; Since the waste generated in the Miracle of Barranca market was characterized and classified, and a survey was prepared, what is your proposal on the use of compost based on market waste? Once the data was obtained, they were processed using basic statistics. It was determined that per day it produces organic waste with 65.00%, inorganic with 28.67% and others with 6.33%, and per month organic with 68.13%, inorganic with 26.63% and others with 5.24% of the total of 10,341 tons/month of August and chemical composition. of the compost has adequate concentration of organic matter, low nitrogen, phosphorus, potassium, magnesium and high pH 8.54. In the proposal for the use of compost, 40% stands out for agricultural use. It is concluded that through the catheterization of the waste, 65% organic is produced and when making the compost it has a concentration of nutrients that are favorable to improve the properties of the soil and strengthen the plant. Therefore, the use of compost is a sustainable alternative for agriculture.

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