In the literature about web survey methodology, significant e orts have been made to understand the role of time-invariant factors (e.g. gender, education and marital status) in (non-)response mechanisms. Time-invariant factors alone, however, cannot account for most variations in (non-)responses, especially fluctuations of response rates over time. This observation inspires us to investigate the counterpart of time-invariant factors, namely time-varying factors and the potential role they play in web survey (non-)response. Specifically, we study the effects of time, weather and societal trends (derived from Google Trends data) on the daily (non-)response patterns of the 2016 and 2017 Dutch Health Surveys. Using discrete-time survival analysis, we find, among others, that weekends, holidays, pleasant weather, disease outbreaks and terrorism salience are associated with fewer responses. Furthermore, we show that using these variables alone achieves satisfactory prediction accuracy of both daily and cumulative response rates when the trained model is applied to future unseen data. This approach has the further benefit of requiring only non-personal contextual information and thus involving no privacy issues. We discuss the implications of the study for survey research and data collection.
The Vulkan real estate site in Oslo is owned by Aspelin Ramm, and includes one of the largest parking garages used for EV charging in Europe. EV charging (both AC and DC) is managed for now predominately for costs reasons but also with relevance at further EV penetration level in this car parking location (mixed EV and ICE vehicles). This neighbourhood scale SEEV4-City operational pilot (OP) has 50 22 kW flexible AC chargers with two sockets each and two DC chargers of 50 kW with both ChaDeMo and CCS outlets. All EV chargers now have a smart control (SC) and Vehicle-to-Grid (V2G) functionality (though the latter may not be in place fully for DC chargers, as they may not be fully connected to the remote back-office system of the EV charging systems operator). A Lithium-ion Battery Energy Stationary Storage System (BESS) with a capacity of 50 kWh is pre-programmed to reduce the energy power peaks of the electric vehicle (EV) charging infrastructure and charges at other times from the central grid (which has a generation mix of 98% from hydro-electric power, and in the region covering Oslo also 1% from wind). The inverter used in the BESS is rated at 50 kW, and is also controlled to perform phase balancing of the 3-phase supply system.
Dit project omvat een verkennend onderzoek dat beoogt de technische route, de scope en de randvoorwaarden van de energietransitie op vakantieparken en campings in beeld te brengen. De sector voor vakantieparken en campings zal, net als alle andere sectoren, binnen dertig jaar nul-emissies van broeikasgassen moeten bereiken. De gemeente Goeree-Overflakkee en de Provincie Zuid-Holland zijn voornemens om een project op te zetten om de voor Goeree-Overflakkee belangrijke sector te helpen de energietransitie te maken. De gemeente en provincie willen graag antwoord op de vraag welke kennis en welke partijen nodig zijn om de duurzaamheidsdoelstelling zodanig in een beleidsproces te gieten dat de belangen van de vele stakeholders in deze sector samenkomen op een wijze dat de doelstelling gehaald wordt.This project entails an exploratory study that aims to map the technical route, scope and preconditions of the energy transition at holiday parks and campsites. The holiday park and camping sector, like all other sectors, will have to achieve zero greenhouse gas emissions within thirty years. The municipality of Goeree-Overflakkee and the Province of South Holland intend to set up a project to help this important sector on Goeree-Overflakkee to make the energy transition. The municipality and province would like an answer to the question of what knowledge and which parties are needed to put the sustainability objective into a policy process in such a way that the interests of the many stakeholders in this sector come together in a way that the objective is achieved.
The leisure industry is an economy of experiences. As a leisure or tourism organisation you want the experience you are offering to be remembered, so visitors share the experience with friends or want to relive it once again. In other words, the experience should be memorable.During an experience (a holiday, a visit to an attraction park or museum), all sorts of emotions are being experienced. The flux of these emotions (strong to weak) is a contributing factor as to how people remember an experience. If there is no emotion involved in an experience, it is likely be forgotten soon.This PhD research explores how exactly emotions contribute to the memorability of experiences, and what pattern of emotions influences it. To be able to measure emotions, state-of-the-art research methods are used from the Experience Lab, such as brain research (EEG) and skin conductance.
