Abstract
A novel control method for a fixed-pitch variable speed wind turbine is introduced and experimental results are presented. The measured absorbed power and rotational speed, together with a look-up table for the aerodynamic efficiency, are used to estimate the wind speed reaching the [...]Abstract
Structural problems in modern societies, such as climate change and congestion problems, require 'transitions' towards a more susTWNnable fulfilment of social needs. Recent research shows that experimenting in niches is crucial for learning about social challenges and stimulating [...]Abstract
Twitter data are used as alternative metrics (altmetrics) to measure the impact or attention of research. Tweets are used to communicate about papers. However, Twitter data can only be used for research evaluation purposes, if biases do not influence tweet decisions on papers. The [...]