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In the face of increasing globalisation, with the biggest cities reaping the greatest rewards, knowledge economy specialist Willem van Winden examines the future for smaller university cities.
Electrification of transportation, communication, working and living continues worldwide. Televisions, telephones, servers are an important part of everyday life. These loads and most sustainable sources as well, have one thing in common: Direct Current. The Dutch research and educational programme ‘DC – road to its full potential’ studies the impact of feeding these appliances from a DC grid. An improvement in energy efficiency is expected, other benefits are unknown and practical considerations are needed to come to a proper comparison with an AC grid. This paper starts with a brief introduction of the programme and its first stages. These stages encompass firstly the commissioning, selection and implementation of a safe and user friendly testing facility, to compare performance of domestic appliances when powered with AC and DC. Secondly, the relationship between the DC-testing facility and existing modeling and simulation assignments is explained. Thirdly, first results are discussed in a broad sense. An improved energy efficiency of 3% to 5% is already demonstrated for domestic appliances. That opens up questions for the performance of a domestic DC system as a whole. The paper then ends with proposed minor changes in the programme and guidelines for future projects. These changes encompass further studying of domestic appliances for product-development purposes, leaving less means for new and costly high-power testing facilities. Possible gains are 1) material and component savings 2) simpler and cheaper exteriors 3) stable and safe in-house infrastructure 4) whilst combined with local sustainable generation. That is the road ahead. 10.1109/DUE.2014.6827758
Data, the raw material from which information is derived, is stored, copied, moved and modified more easily than ever. This quantum leap reaches levels outside our imagination. Surrounded by sensors, recommendation systems, invisible algorithms, spreadsheets and blockchains, the ‘difference that makes a difference’ can no longer be identified. Big Data is a More Data ideology, driven by old school hypergrowth premisses. As Nathan Jurgenson once observed: “Big Data always stands in the shadow of the bigger data to come. The assumption is that there is more data today and there will necessarily be even more tomorrow, an expansion that will bring us ever closer to the inevitable pure ‘data totality.” (2) Nothing symbolizes the current hypergrowth obsession better than Big Data. Let’s investigate what happens when we apply degrowth to data and reserve datafication–as a decolonial project, a collective act of refusal, an ultimate sign of boredom. We’re done with you, data system, stand out of my light.
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tract Micro wind turbines can be structurally integrated on top of the solid base of noise barriers near highways. A number of performance factors were assessed with holistic experiments in wind tunnel and in the field. The wind turbines underperformed when exposed in yawed flow conditions. The theoretical cosθ theories for yaw misalignment did not always predict power correctly. Inverter losses turned out to be crucial especially in standby mode. Combination of standby losses with yawed flow losses and low wind speed regime may even result in a net power consuming turbine. The micro wind turbine control system for maintaining optimal power production underperformed in the field when comparing tip speed ratios and performance coefficients with the values recorded in the wind tunnel. The turbine was idling between 20%–30% of time as it was assessed for sites with annual average wind speeds of three to five meters per second without any power production. Finally, the field test analysis showed that inadequate yaw response could potentially lead to 18% of the losses, the inverter related losses to 8%, and control related losses to 33%. The totalized loss led to a 48% efficiency drop when compared with the ideal power production measured before the inverter. Micro wind turbine’s performance has room for optimization for application in turbulent wind conditions on top of noise barriers. https://doi.org/10.3390/en14051288
We present a fully working prototype of NOOT, an interactive tangible system which supports (sharing of) moments of reflection during brainstorms. We discuss the iterative design process, informed by embodied situated cognition theory and by user studies in context using various versions of the prototype. Apart from a potentially useful product, NOOT served as a research-tool showing how physical materials and social interactions scaffold people’s sense-making efforts, and how technology might fit in to support this process.
A Magnet-related program has been recently adopted in the Netherlands. Support for staff nurses from nurse middle managers (NMMs) is a key component of such a program. A Bourdieusian ethnographic organizational case study in four hospitals in the Netherlands and the United States (Magnet, Magnet-related and non-Magnet) was conducted to explore NMMs’ supporting role behavior. Bourdieus concepts of habitus, dispositions, field and capital guided the analysis. Eight dispositions constitute NMMs habitus. A caring, clinical and scientific disposition enhance NMMs’ capital in particular organizations-as-fields. Further research is necessary to link Magnet (related) program characteristics to various configurations of dispositions of NMMs habitus.
Aims: To evaluate the effects of the implementation of a professional practice model based on Magnet principles on the nurse work environment in a Dutch teaching hospital. Design: A quasi-experimental study. Methods: Data were collected from registered nurses working on the clinical wards and outpatient clinics of the hospital in June/July 2016 (baseline) and in June/September 2019 (measurement of effects). Participants completed the Dutch Essentials of Magnetism II survey, which was used to measure their perception of their work environment. After baseline measurements were collected, interventions based on a professional practice model incorporating Magnet principles were implemented to improve the nurse work environment. Descriptive statistics and independent t-tests were conducted to examine differences between survey outcomes in 2016 and 2019. Results: Survey outcomes revealed significant changes in the nurse work environment between 2016 and 2019. Seven of the eight subscales (essentials of magnetism) improved significantly. Score for overall job satisfaction increased from 7.3 to 8.0 and score for quality of care increased from 7.0 to 7.6. On unit level, 17 of the 19 units showed improvement in the nurse work environment. Conclusion: The implementation of a professional practice model positively affects the nurse work environment, job satisfaction and quality of care. Impact: Nowadays, the quality of care is threatened by workload pressure and the low autonomy experienced by nurses. Considering the global shortage of nurses and growing complexity of healthcare, it is important to invest in improving the nurse work environment. The Magnet concept created a work environment in which nurses can deliver optimal quality of care. Knowledge of how Magnet principles affect the nurse work environment in the Netherlands is missing. These study results, including the description of how the interventions were implemented, will assist other hospitals to develop improvement strategies by focusing on the nurse work environment.
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