Suchergebnisse

Teacher scaffolding, in which teachers support students adaptively or contingently, is assumed to be effective. Yet, hardly any evidence from classroom studies exists. With the current experimental classroom study we investigated whether scaffolding affects students' achievement, task effort, and appreciation of teacher support, when students work in small groups. We investigated both the effects of support quality (i.e., contingency) and the duration of the independent working time of the groups. Thirty social studies teachers of pre-vocational education and 768 students (age 12–15) participated. All teachers taught a five-lesson project on the European Union and the teachers in the scaffolding condition additionally took part in a scaffolding intervention. Low contingent support was more effective in promoting students' achievement and task effort than high contingent support in situations where independent working time was low (i.e. help was frequent). In situations where independent working time was high (i.e., help was less frequent), high contingent support was more effective than low contingent support in fostering students' achievement (when correcting for students' task effort). In addition, higher levels of contingent support resulted in a higher appreciation of support. Scaffolding, thus, is not unequivocally effective; its effectiveness depends, among other things, on the independent working time of the groups and students' task effort. The present study is one of the first experimental study on scaffolding in an authentic classroom context, including factors that appear to matter in such an authentic context.

How can we explain why some regions experienced large decreases in subjective well-being during the 2008 recession, while in other regions, the changes were only very modest? Building on the literature on resilience in subjective well-being during periods of crisis, this article explores a related but undervalued factor that moderates the localized relationship between macroeconomic developments and life evaluation: regional quality of governance. We use individual-level data on life satisfaction and personal information taken from Eurobarometer for 89 European regions in the EU-28 for the period of 2005-2014, combined with macroeconomic variables and regional quality of governance data to test for the hypothesized moderating effect of quality of governance. The results demonstrate that increased regional unemployment and financial stress have a less aggravating effect on subjective well-being in regions characterized by a high quality of governance. These results support the capacity of quality of governance to buffer the negative effects of adverse macroeconomic conditions, most likely through generating trust and providing a safety net.

AbstractGentrification in China is intertwined with urban redevelopment, which causes the large‐scale displacement of rural–urban migrants from 'villages in the city' (ViCs). Because of the informality of ViCs, migrant renters have very insecure tenancy and during redevelopment they are treated as a negligible ('invisible') social group. As they are very difficult to locate after displacement, they are also literally invisible to researchers. To make the invisible visible, this study traced a sample of displaced migrants from Huangbeiling village in Shenzhen. The focus was on the displacement process and on identifying the consequences for the displaced. We found various forms of displacement during the redevelopment process. Nearby ViCs were prioritized by displaced migrants to minimize as much utility loss as possible. However, they generally suffer from decreased proximity, increased living costs, and the loss of social networks and job opportunities. Remarkably, some choose to return to the gentrifying village, enduring displacement in situ caused by increasing rents, drastic physical neighbourhood changes and declining liveability, in exchange for retaining their original social and economic networks. Large‐scale urban redevelopment is causing the rapid shrinkage of informal housing. Recognizing and addressing the housing needs of this impoverished social group is a matter of urgency.

The two-generation study (OECD TG 416) is the standard requirement within REACH to test reproductive toxicity effects of chemicals with production volumes >100 tonnes. This test is criticized in terms of scientific relevance and animal welfare. The Extended One Generation Reproductive Toxicity Study (EOGRTS), incorporated into the OECD test guidelines in 2011 (OECD TG 443) has the potential to replace TG 416, while using only one generation of rats and being more informative. However, its regulatory acceptance proved challenging. This article reconstructs the process of regulatory acceptance and use of the EOGRTS and describes drivers and barriers influencing the process. The findings derive from literature research and expert interviews. A distinction is made between three sub-stages; The stage of Formal Incorporation of the EOGRTS into OECD test guidelines was stimulated by retrospective analyses on the value of the second generation (F2), strong EOGRTS advocates, animal welfare concern and changing US and EU chemicals legislation; the stage of Actual Regulatory Acceptance within REACH was challenged by legal factors and ongoing scientific disputes, while the stage of Use by Industry is influenced by uncertainty of registrants about regulatory acceptance, high costs, the risk of false positives and the manageability of the EOGRTS. (C) 2014 Elsevier Inc. All rights reserved.

In this study, the comets have distributions regarding their heliocentric distances where they appear in two regions, Kuiper belt (short period) and Oort cloud (long period). Details here give new information about the entire regions of these comets; the research shows that 54% of comets are nearby asteroid belt, but only 11% are in Kuiper belts and 35 % are from Oort cloud. The research focuses on comets with a nucleus's radius larger than 1 km. The comets with a nuclear radius of 1-10 km have high percentage 51%.
From the results, the maximum comets' radius is found in comet 29P/Schwassmann -Wachmann as roughly 87 km, and also in comet C/2018 N2 (ASASSN) which has radius 88 km. All comets, that have been distributed concerning heliocentric, depend on statistical results to divide new comets' regions versus their radiuses. The results reveal new details of comets' distances from the sun. The distances of 100 comets are shown in Figure (2).
The results show that there is a third comets' region: region (A) found between Mars and Saturn and between Oort cloud and Kuiper belt.
There is one comet like(C/2019 L3 (ATLAS)) that is farther than Alpha Centauri star. Therefore, the comet is restricted by a couple of gravity systems.

The sustainability challenge requires various forms of experimentation with inventions, which may lead to an upscaling process in which the invention and its applications will spread to other users and regions in the world. However, many experiments fail. In this paper, we explore the success factors for sustainability experiments in their contribution to a longer-term regime change. These factors are related to the experiment itself as well as to the habitat in which the experiment takes place. A habitat is regarded as a configuration of contextual factors, which are mainly locally or regionally embedded. We introduce complementary insights from transition management literature and regional innovation systems literature to hypothesise that various types of experiments have distinctive favourite habitats, each with their specific success factors. Our exploratory survey among 56 sustainability experiments throughout Europe in the area of food, mobility and energy innovation suggests that user involvement is the most important success factor. Other important factors are the cooperation in local and regional networks, the policy instruments from the local and regional government, the dissemination of learning experiences, and the existence of a local or regional vision of the future. We conclude that entrepreneurs, users, local and regional governments as well as other regional partners should collaborate actively to make sustainability experiments more successful.

This incisive volume brings together postcolonial studies, visual culture and cultural memory studies to explain how the Netherlands continues to rediscover its history of violence in colonial Indonesia. Dutch commentators have frequently claimed that the colonial past and especially the violence associated with it has been 'forgotten' in the Netherlands. Uncovering 'lost' photographs and other documents of violence has thereby become a recurring feature aimed at unmasking a hidden truth.

The author argues that, rather than absent, such images have been consistently present in the Dutch public sphere and have been widely available in print, on television and now on the internet. Emerging Memory: Photographs of Colonial Atrocity in Dutch Cultural Remembrance shows that between memory and forgetting there is a haunted zone from which pasts that do not fit the stories nations live by keep on emerging and submerging while retaining their disturbing presence.

Study background and aims: Ethnic disparities in mental health in adolescence may play a role in the development of ethnic disparities in educational attainment. The aim of this study was to assess the contribution of ethnic disparities in mental health problems in adolescence to ethnic disparities in educational attainment in adulthood. Methods: We followed two community samples of respectively 486 Dutch native and 168 Turkish migrant adolescents (11—15 years old) into adulthood (21—25 years old). Mental health was measured in adolescence, and educational attainment was assessed in adulthood. The contribution of mental health disparities to educational disparities was estimated by the degree of attenuation of the odds ratio (OR) for low education after adjustment for mental health problems. Results: Adult Turkish men more often had attained lower education than Dutch men (OR 1.81 (1.01—3.25)). Additional adjustment for mental health problems during adolescence did not change the OR. In Turkish women, however, the OR was 1.94 (1.04—3.62), and adjustment for mental health problems lowered it by 96% to 1.04 (0.51—2.14). The contribution was mostly due to ethnic disparities in internalizing problems. Conclusion: In women, but not in men, ethnic disparities in mental health, especially internalizing problems, were a strong predictor for the development of ethnic disparities in educational attainment. Prevention or treatment of internalizing problems among Turkish girls will probably contribute to the prevention of educational disparities.