Collective redress and workers' rights in the Netherlands

This contribution discusses the Dutch possibilities of collective redress in the domain of labour law. More specifically, it examines the legal options of bringing collective actions and obtaining collective redress in Dutch courts in labour cases, and elaborates on the relevant legal framework as well as the extent to which these opportunities have been used in practice. Findings imply that the Netherlands was among one of the first European countries to introduce a general collective action system. This general collective action regime allows unions and other interest groups to raise cases to protect workers’ rights, even outside the scope of collective labour agreements. Such a collective action regime, however, is not commonly used in practice. Nevertheless, as of January 2020 the admissibility criteria for this general collective redress mechanism have been expanded and it has become an ‘opt-out’ regime, without the need for individual workers to initiate individual follow-up proceedings in the event of a successful case. The latter could improve the effective enforcement of workers’ rights in practice and could provide an incentive for trade unions and other organisations that are active in the protection of workers’ rights to incite a collective action

A collaborative tool for mobilizing knowledge in agrobiodiversity and the interface with climate change: the Platform for Agrobiodiversity Research

Poster presented at 2nd ANAFE International Symposium. Lilongwe (Malawi), Jul 200

Mid-frequency aperture arrays: the future of radio astronomy

Aperture array (AA) technology is at the forefront of new developments and discoveries in radio astronomy. Currently LOFAR is successfully demonstrating the capabilities of dense and sparse AA's at low frequencies. For the mid-frequencies, from 450 to 1450MHz, AA's still have to prove their scientific value with respect to the existing dish technology. Their large field-of-view and high flexibility puts them in an excellent position to do so. The Aperture Array Verification Program is dedicated to demonstrate the feasibility of AA's for science in general and SKA in particular. For the mid-frequency range this has lead to the development of EMBRACE, which has already demonstrated the enormous flexibility of AA systems by observing HI and a pulsar simultaneously. It also serves as a testbed to demonstrate the technological reliability and stability of AA's. The next step will put AA technology at a level where it can be used for cutting-edge science. In this paper we discuss the developments to move AA technology from an engineering activity to a fully science capable instrument. We present current results from EMBRACE, ongoing tests of the system, and plans for EMMA, the next step in mid-frequency AA technology.Comment: 8 pages, 7 figures, proceedings of Resolving The Sky - Radio Astronomy: Past, Present and Future (RTS2012), April 17-20, 2012, Manchester, U

Unraveling Social Media Effects:How the Intertwinement of Online Content and User Behaviors Guides Mental Health and Body Image

The rapid growth in popularity of social media platforms has fueled concerns about the possible negative effects of social media use on young people’s mental health and body image. To unravel social media effects, scholars argued that social media activities should be divided into active and passive social media use. It has been hypothesized that active social media use (i.e., creating content) leads to positive effects on mental health and body image, whereas passive social media (i.e., viewing content) leads to negative effects. In some cases, however, active social media use appeared to also lead to more negative feelings about oneself and one’s life, while passive social media use can lead to more positive feelings about these matters. Hence, the active-passive dichotomy seems a rough division that needs further specification. What types of content do young people post online, and what do they passively consume? And how does that affect their mental health and body image? To advance our knowledge and insights on these matters, the overarching goal of this dissertation was to investigate if, when, and how social media use affects young people’s mental health and body image. In Chapter 2, findings of a systematic literature review indicated that how social media use coincides with mental health and body image largely depends on the content of the self-presentation created or passively consumed. For example, sharing negative life events was generally linked to decreased subjective well-being. In contrast, sharing authentic self-presentations was linked with increased subjective well-being. The second study (Chapter 3) examined how ethno-racial identities may predispose differences in publicly posted selfies. Facial recognition was used to classify the selfie-takers’ ethno-racial identity on over 3000 publicly posted selfies. Findings revealed that individuals varying in ethno-racial identity generally differed in their online self-presentations. For example, Asian and Hispanic selfie-takers posted more of their context and less of themselves than black and white selfie-takers. The third study in this dissertation examined how the prevalence of posting and seeing different photo-types was linked with mental health and body image (Chapter 4). This study included more than 400 adolescents. Findings of this study indicated that, for example, posting more authentic photos of oneself is associated with higher levels of mental health, whereas posting edited photos is associated with more body shame. The last study examined the potential longer-term impact of social media use (Chapter 5). This study included more than 400 Japanese adolescents and more than 500 Dutch adolescents. The adolescents completed three online surveys, with one-month intervals in between. Findings of this study indicated that both a higher frequency of posting and being exposed to authentic photos can induce positive outcomes for mental health and body image, whereas both a higher frequency of posting and being exposed to edited photos of others was found to relate to negative outcomes. Results were, however, different between Dutch and Japanese adolescents. The results of the studies in this dissertation generally conclude that time-based approaches of social media use reflect an oversimplification to interpret the possible effects on mental health and body image. The findings of this dissertation all advocate that there is a need to apply an integrated content-specific and behavior-specific approach. Moreover, social media effects are conditional, meaning that social media effects cannot be attributed to all adolescents and may vary across cultural context. Hence, if and when social media impacts mental health and body image largely depends on how and why they use social media as well as the way they respond to their social media use

Principal response curves technique for the analysis of multivariate biomonitoring time series

Although chemical and biological monitoring is often used to evaluate the quality of surface waters for regulatory purposes and/or to evaluate environmental status and trends, the resulting biological and chemical data sets are large and difficult to evaluate. Multivariate techniques have long been used to analyse complex data sets. This paper discusses the methods currently in use and introduces the principal response curves method, which overcomes the problem of cluttered graphical results representation that is a great drawback of most conventional methods. To illustrate this, two example data sets are analysed using two ordination techniques, principal component analysis and principal response curves. Whereas PCA results in a difficult-to-interpret diagram, principal response curves related methods are able to show changes in community composition in a diagram that is easy to read. The principal response curves method is used to show trends over time with an internal reference (overall mean or reference year) or external reference (e.g. preferred water quality or reference site). Advantages and disadvantages of both methods are discussed and illustrate

Polderproject Woudse Droogmakerij: voorbeeldproject voor verbetering waterkwaliteit

Het Polderproject Woudse Droogmakerij moet leiden tot een meetbare verbetering van de waterkwaliteit met teeltmaatregelen die het rendement van de bedrijven garanderen of verbeteren. De kennis die ontstaat wordt landelijk ingezet om de emissie van gewasbeschermingsmiddelen en nutriënten vanuit de glastuinbouw te verminderen