Michael additions of α-nitroesters with enones and α,β-unsaturated aldehydes result in quantitative conversions to the corresponding 1,4-adducts by performing the reactions in water in the presence of ytterbium triflate as water-tolerant Lewis acid.
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In this article, we review the recent progress that has been made in the field of Lewis-acid catalysis of carbon carbon-bond-forming reactions in aqueous solution. Since water hampers the hard hard interactions between the catalyst and the reactant, it often complicates catalysis. However, once coordination has taken place, water can have beneficial effects on rates and selectivities of Lewis acid catalysed Diels Alder reactions, aldol reactions, allylation reactions, Barbier and Mannich type reactions as well as Michael additions.
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This research focuses on exit choices within SMEs. In this study, “exit choice” refers to the decision to opt for either liquidation or sale of the firm. The predictions focus on human-capital and firm-resource variables. The hypotheses are tested on a set of 158 owners of small firms, the majority of which are micro-firms with 0–9 employees. The results of a series of binominal logistic regression analyses show that firm-resource characteristics (previous sales turnover, the firm’s independence from its owner, and firm size), together with one aspect of the owner’s specific human capital (the owner’s acquisition experience), predict exit choice. The conclusions have been made with caution, as the dataset is relatively small and the number of predictors is limited.
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Journalists in the 21st century are expected to work for different platforms, gather online information, become multi‐media professionals, and learn how to deal with amateur contributions. The business model of gathering, producing and distributing news changed rapidly. Producing content is not enough; moderation and curation are at least as important when it comes to working for digital platforms. There is a growing pressure on news organizations to produce more inexpensive content for digital platforms, resulting in new models of low‐cost or even free content production. Aggregation, either by humans or machines ‘finding’ news and re‐publishing it, is gaining importance. At so‐called ‘content farms’ freelancers, part‐timers and amateurs produce articles that are expected to end up high in web searches. Apart from this low‐pay model a no‐pay model emerged were bloggers write for no compensation at all. At the Huffington Post thousands of bloggers actually work for free. Other websites use similar models, sometimes offering writers a fixed price depending on the number of clicks a page gets. We analyse the background, the consequences for journalists and journalism and the implications for online news organizations. We investigate aggregation services and content farms and no‐pay or low‐pay news websites that mainly use bloggers for input.
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Vast empirical evidence underscores that exporting firms are more productive than non-exporters. As governments accordingly pursue export-promoting policies we are interested in the firmness of these conclusions with respect to African small and medium sized enterprises (SMEs) and the influence of the destination of export trade. Using a micro-panel dataset from five African countries we confirm the self-selection. We apply propensity scores to match exporters and use a difference-in-difference methodology to test if African SMEs experience productivity gains because of export participation. Results indicate that African firms significantly learn-by-exporting. Manufacturers obtain significant performance improvements due to internationalization although this effect is moderated by export destination. Firms that export outside Africa become more capital intensive and at the same time hire more workers. In contrast we find evidence that exporters within the African region significantly downsize in capital intensity. Results regarding skill-bias of internationally active firms are mixed, where exporters within the region expand in size and hire more relatively unskilled workers.
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Population ageing has been a focus of research since the 1960s (Michael et al. 2006), and it has become a domain of international discussions, debates and research throughout a myriad of disciplines including housing, urban planning and real estate (Buffel and Phillipson 2016, van Bronswijk 2015, Kort 2017). Kazak et al. (2017) described how the ageing population has a profound impact on the real estate market, which is transforming in terms of availability of retirement accommodation for older people including accessibility, adaptability, and the availability of single-floor dwellings. Older people usually have a strong connection with the environment they understand and know well (van Hoof et al. 2016), enabling them to spend the latter years of their life in a familiar setting, which, in turn, influences their self-confidence, independence and the potential to successfully age in place. Older people are encouraged to continue living in their homes a familiar environment to them, instead of moving to an institutional care facility, and this is referred to as “ageing-in-place” (van Hoof 2010). This can be supported by creating a functional and spatial structure of cities that are friendly to older people (van Hoof et al. 2018, van Hoof and Kazak 2018). In the domain of environmental design, a series of home modifications can be identified. The most frequently encountered measures in and around the home are adaptations to improve the accessibility of the home (i.e., removal of barriers such as thresholds, installation of stair lifts in multi-storey homes, and the replacement of bath tubs by walk-in showers,). Separately from these expensive measures and adaptations, simple handgrips can improve the accessibility, safety and mobility of older people (van Hoof et al. 2010, van Hoof et al. 2013). A further concern that should be considered within the living environment is the lack of storage space for wheeled walkers and mobility scooters (including a place to charge batteries) whilst living in an apartment block with limited space to manoeuvre on corridors (Kazak et al. 2017). However, with increasing demands for care, it is not always possible to remain living in one’s own home and moving into a residential or nursing facility is the only remaining option; whereby, specialist and/or nursing care can be accessed and provided in these living environments (van Hoof et al. 2009). Policy principles within long-term care aim to provide a home from home environment for their residents (Moise et al. 2004). Several specialised housing models have been developed in order to facilitate this person-centred care approach, as more traditional institutional settings often do not match with the new holistic and therapeutic goals (Verbeek 2017). Radical alterations have been made in comparison with traditional nursing homes, implementing changes in the organisational, physical and social environment of settings (Verbeek et al. 2009, van Hoof et al. 2009). For example, smaller groups of older people (six to seven persons) form a household, with nursing staff having integrated tasks, including assistance with activities of daily living, preparing meals, organising activities and doing household chores together with residents. Daily life is mainly determined by residents and nursing staff, and the physical environment resembles an archetypal house. With this distinct increase and popular notion of the role real estate plays in ageing-in-place and living well in old age, there is also a shifting focus regarding participation, activation, and helping each other. Home modifications and the home environment itself have a profound influence on the care provided and received at home. In short, the fewer barriers there are at home, the easier and less onerous responsibilities placed on the family carer(s) (Duijnstee 1992). Family carers themselves need such environmental interventions that support care, and a sense of community and belonging. Enabling one to age-in-place and to successfully age requires more than a simple occupational therapeutic approach of environmental interventions. It requires innovative new housing encompassing suitable technology arrangements that can facilitate and enable older adults to live comfortably into old age, preferably with others and offer family members (i.e., children, grandchildren and spouse). Furthermore, interconnecting technology into such environments can offer family members the option and opportunity to monitor their loved one remotely whilst all actors know there are additional safety barriers in place. This chapter discusses and provides innovative examples from a Dutch social housing association and their practices, which illustrates a new approach to environmental design that focuses more on building new communities in conjunction with the building itself, as opposed to the occupational therapeutic approaches and environmental support. First, we take a closer look at why we care for each other, which is the basis of the participation society, in which we must look after people who are near to us. This should ideally be at the basis of new housing arrangements -in which people are stimulated to meet, engage, survey and care- that social housing associations are developing, retrofitting and developing.
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In this report I am happy to share some of the developments concerningethnomusicology and related disciplines in the Netherlands over the past two years.
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This article presents and discusses an extracurricular, co-constructed programme: “The Catalyst Club” as a form of Artistic Educational Commoning (AEC). Having been developed as part of a PhD research at Minerva Art Academy (Groningen, TheNetherlands), The Catalyst Club (TCC) explored new perspectives on the education of artists and designers in a globalized world and created alternative modes of operating in higher art education. It brought together students, alumni, teachers from a range of disciplines, and external participants. During developing TCC, the author occupied a dual role as researcher and participant, working together with others in an artistic co-creative process. TCC drew on and developed the methods relating to Collaborative Autoethnography, Participatory Action Research and Artistic Research. This study presents AEC as a communal effort to build spaces for learning and experimentation. They are created through interaction and cooperation, based on social relations and the production of shared values. As such it can offer a counterbalance to the extensive individualisation, instrumentalization, and commodification of communities in higher art education. The article formulates some recommendations on how AEC can reconnect the education of artists and designers with the role of the arts in wider technological, societal, and political contexts.
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Urban flooding has become a key issue for many cities around the world. The project ‘INnovations for eXtreme Climatic EventS’ (INXCES) developed new innovative technological methods for risk assessment and mitigation of extreme hydroclimatic events and optimization of urban water-dependent ecosystem services at the catchment level. DEMs (digital elevation maps) have been used for more than a decade now as quick scan models to indicate locations that are vulnerable to urban flooding. In the last years the datasets are getting bigger and multidisciplinary stakeholders are becoming more demanding and require faster and more visual results. In this paper, the development and practical use of DEMs is exemplified by the case study of Bergen (Norway), where flood modelling using DEM is carried out in 2017 and in 2009. We can observe that the technology behind tools using DEMs is becoming more common and improved, both with a higher accuracy and a higher resolution. Visualization tools are developed to raise awareness and understanding among different stakeholders in Bergen and around the world. We can conclude that the evolution of DEMS is successful in handling bigger datasets and better (3D) visualization of results with a higher accuracy and a higher resolution. With flood maps the flow patterns of stormwater are analysed and locations are selected to implement (sub-)surface measures as SuDS (Sustainable Urban Drainage systems) that store and infiltrate stormwater. In the casestudy Bergen the following (sub-)surface SuDS have been recently implemented with the insights of DEMS: settlement storage tank, rainwater garden, swales, permeable pavement and I/T-drainage. The research results from the case study Bergen will be shared by tools to stimulate international knowledge exchange. New improved DEMs and connected (visualization) tools will continue to play an important role in (sub-)surface flood management and climate resilient urban planning strategies around the world.
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