Resumen es: Los hongos P. ostreatus, presentan pardeamiento enzimatico en el periodo de poscosecha, para minimizarlo se incorpora acido ascorbico como inhibidor de l...

When entering the university the student is itself faced a variety of learning situations that raise the putting to him in scene of different abilities to be able to reach the awaited objective. A deficiency in this sense can lead the student to obtain poor men results in its process academic and to generate desertion The finally present article describes de the multivariad is as the students of enginery in agreement with the learning styles classify themselves that use.

En este trabajo se presentan los criterios de diseño para la implementación de un medidor de intensidad de campo magnético, mediante un sensor Hall, es decir un magnetómetro Hall, teniendo en cuenta criterios instrumentales y metrológicos. En el proceso de medición de campo magnético se presenta incertidumbre tipo B, debida a la transducción, amplificación, filtrado y conversión A/D. Se incorporan consideraciones que el instrumentador debe tener en cuenta para reducir el índice de incertidumbre, haciendo el proceso de medición más eficiente. Se realizó la instrumentación del magnetómetro Hall y se redujo el índice de incertidumbre en un 5%, correspondiente a uno de los factores de error. PALABRAS CLAVES: Sensor Hall, magnetómetro, señal, magnética. ABSTRACT In this work, there are presented the criteria for design and implementation of a magnetic field intensity meter, through a Hall sensor, i.e. a Hall magnetometer, bearing in mind the instrumental and metrological criteria. In the process of measuring a magnetic field, the uncertainty of kind B is presented, due to the transduction, magnification, filtering and A/D conversion. Additionally, there are included some considerations to have into account by the instrumental experimentalist in order to reduce the uncertainty index, making the measurement process even more efficient. Besides, the instrumentation of a Hall magnetometer was done and the uncertainty index was reduced by a 5%, corresponding to one of the error factors.