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Despite the growing literature on interdisciplinary teaching experiences in higher education, setting an interdisciplinary course remains an intuitive process of problematic transmission among teachers. We defined an interdisciplinary course structure grounded in constructivism, academic motivation, and social and managing psychology. The teaching strategy included teamwork, problem-based learning (PBL), and activities to fostering academic motivation and working with diverse perspectives. Six interdisciplinary teaching teams developed courses for undergraduate students from multiple university areas. The student course experience questionnaire and student reflective writing pieces were used as instruments for data collection, and a mixed-methods approach was used for data analysis. From the student perspective, participating in an interdisciplinary course influenced the development of four top skills and attitudes: to work as a team member, to explore ideas confidently with other people, to develop as a person, and to develop relevant, ethical, social, and professional perspectives. Impact was also found in developing enthusiasm for learning, tackling unfamiliar problems, and becoming an active enquiring learner. Results indicated course characteristics linked to five academic motivation areas, pointing to 'success' and 'caring' experiences as the most influential. Also, teamwork was a central aspect of the experience, positively influenced by group diversity and the development of a learning community. In summary, this work offers insights into interdisciplinary course development and evaluation, guiding teachers to focus on aspects rarely attended in traditional higher education courses.

Este artículo presenta un modelo de predicción aplicable a la propagación del ruido proveniente de los aerogeneradores a través de un procedimiento de cálculo de fácil implementación. El modelo de predicción propuesto es semi-empírico y se basa en el análisis de los fenómenos relacionados con la generación y propagación de los niveles sonoros y las mediciones de campo. Se diseñó un programa experimental que comprendió la medición de los niveles de presión sonora con un sonómetro en determinadas condiciones meteorológicas y diferentes distancias al interior de un parque eólico para compararlos con los niveles estimados por la norma ISO 9613 Parte 2. Se realizó un análisis estadístico de los datos registrados en campo para observar la dependencia con las variables meteorológicas registradas durante las mediciones. El modelo propuesto explica el 92,5 % de la variabilidad del nivel de presión sonora residual y tiene un error absoluto medio de 2.9 dB. Al eliminar el 5,0 % de los datos por considerarlos atípicos, el modelo propuesto explica el 94,7 % de la variabilidad del nivel de presión sonora residual con un error absoluto medio de 2,5 dB. Hay una relación estadísticamente significativa entre las variables en un nivel de confianza del 95,0 %. Los resultados han arrojado un modelo bastante satisfactorio para predecir el ruido proveniente de los aerogeneradores hasta distancias de 900 m, mejorando en gran medida lo obtenido hasta el momento por el método establecido en la norma ISO 9613 Parte 2

Several noise propagation models used to calculate the noise produced by wind turbines have been reported. However, these models do not accurately predict sound pressure levels. Most of them have been developed to estimate the noise produced by industries, in which wind speeds are less than 5 m/s, and conditions favor its spread. To date, very few models can be applied to evaluate the propagation of sound from wind turbines and most of these yield inaccurate results. This study presents a comparison between noise levels that were estimated using the prediction method established in ISO 9613 Part 2 and measured levels of noise from wind turbines that are part of a wind farm currently in operation. Differences of up to 56.5 dBZ, with a median of 29.6 dBZ, were found between the estimated sound pressure levels and measured levels. The residual sound pressure levels given by standard ISO 9613 Part 2 for the wind turbines is larger for high frequencies than those for low frequencies. When the wide band equivalent continuous sound pressure level is expressed in dBA, the residual varies between −4.4 dBA and 37.7 dBA, with a median of 20.5 dBA.

En las entidades ambientales, los encargados de las mediciones de ruido ambiental y en general todas las personas que de una u otra forma han trabajado en esta temática, en algún momento se han puesto a pensar sobre la representatividad del tiempo unitario de muestreo y la forma de realizar evaluaciones para dar cumplimiento con dicho tiempo, sin que se aumenten considerablemente los costos de medición. En este artículo se plantea una metodología para determinar cómo un intervalo de cierta duración -en este caso, quince (15) minutos- para el muestreo del nivel de presión sonora es representativo para el período de una (1) hora, logrando de esta manera optimizar el uso de los sonómetros "fijos" y proponiendo una estrategia para reducir los costos en las mediciones de ruido ambiental y en general la elaboración de mapas de ruido.The managers of environmental noise measurements in environmental control agencies, or in general every person that work in this subject, have to think on the representativity of the unit measurement time interval, and how to evaluate it in order to get good quality results regarding the unit measurement time without increasing the measurement costs. A methodology for deciding if a certain measuring time interval -in this case, fifteen (15) minutes- is representative of noise pressure levels occurring during one hour, is proposed in this paper. This methodology allows to optimize the use of stationary sound level meters and to propose a strategy for reducing the costs of environmental noise measurements and of the designing of noise maps in general.

Este documento establece la metodología y los procedimientos necesarios para llevar a cabo las funciones de evaluación, control y seguimiento del ruido proveniente de las fuentes fijas de emisión de ruido, de una manera estandarizada, adecuada, repetible y confiable. El protocolo se orienta a implementar en forma detallada el procedimiento para determinar la emisión de ruido, contenido en la resolución 627 del 2006 expedida por el Ministerio de Ambiente, Vivienda y Desarrollo Territorial, a la vez que introduce algunas modificaciones que lo mejoran en forma considerable.This document sets out the necessary methodology and procedures to carry out the functions of evaluation, control and monitoring of noise from stationary sources of emission of noise, in a standardized, adequate, repeatable and reliable way. The protocol aims to implement in detail the procedure for determining the noise emission, according to the Resolution 627 of 2006 issued by the Ministry of Environment, Housing and Territorial Development. At the same time the protocol introduces some modifications that improve it considerably.