126 research outputs found
Civic crowdfunding research: challenges, opportunities, and future agenda
Civic crowdfunding is a sub-type of crowdfunding through which citizens, in collaboration with government, fund projects providing a community service. Although in the early stages of development, civic crowdfunding is a promising area for both research and application due to its potential impact on citizen engagement, as well as its influence on the success of a wide range of civic projects ranging from physical structures to amenities and local services. However, the field remains under-addressed in academic research and underdeveloped in terms of the number of civic projects posted to crowdfunding platforms. Acknowledging these issues, we outline the history of civic crowdfunding and describe the current landscape, focusing on online crowdfunding platforms established specifically for the funding of civic projects (Citizinvestor, ioby, Neighbor.ly, Spacehive). The challenges and the opportunities of civic crowdfunding are examined, and its distinguishing characteristics are outlined, including a consideration of the impact of social media and platform features. We then propose a research agenda to help shape the future of this emergent field
Bimetallic MOFs (H3O)x[Cu(MF6)(pyrazine)2]·(4 − x)H2O (M = V4+, x = 0; M = Ga3+, x = 1): co-existence of ordered and disordered quantum spins in the V4+ system
The title compounds are bimetallic MOFs containing [Cu(pyz)2]2+ square lattices linked by MF6n− octahedra. In each, only the Cu2+ spins exhibit long-range magnetic order below 3.5 K (M = V4+) and 2.6 K (M = Ga3+). The V4+ spins remain disordered down to 0.5 K
Cultivares de uva para suco e sua relação com os teores de polifenóis e com a capacidade antioxidante.
Têm sido reportadas evidências científicas sobre os benefícios do vinho para a saúde humana. Estes benefícios estão relacionados especialmente com a ingestão de antioxidantes que protegem o organismo das agressões provocadas por espécies oxtçênío-reatívas. Nas uvas, os compostos fenólicos concentram-se na casca e na semente, sendo os principais agentes com atividade antioxidante. Este trabalho teve como objetivo determinar a concentração de compostos fenólicos e a capacidade antioxidante de sucos elaborados com uvas tradicionalmente empregadas pela indústria de suco (Isabel, Bordô, Concord) e de novas seleções e cultivares desenvolvidas pelo programa de melhoramento genético da Embrapa Uva e Vinho (BRS Rúbea, Concord Clone 30, Isabel Precoce, BRS Cora, BRS Violeta, Seleções 111-34, 188-2, 213-1, 238-8, 505-156, 507-1, 763-57, 773-85, 773-138, 773-321). Os compostos fenólicos totais foram analisados por Folin-Ciocalteau (mg/L de ácido gálico) e a capacidade antioxidante pelo método de DPPH (IJM de Trolox). Foi efetuada análise de variância e a comparação das médias foi feita pelo teste de Tukey (P=0,05 e P=O,Ol). Houve diferença altamente significativa (P<O,Ol) entre os sucos com relação à capacidade antioxidante e à concentração de polifenóis. A concentração mais elevada para estes dois componentes foi observada na cultivar BRS Violeta e na Seleção 773-321. A concentração mais baixa foi encontrada no suco da Seleção 763-57. O coeficiente de correlação (r) entre capacidade antioxidante e polifenóis foi de 0,95
Transformations in network governance: the case of migration intermediaries
types: Article"This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Ethnic and Migration Studies on 3 February 2015 available online: http://wwww.tandfonline.com/10.1080/1369183X.2014.1003803Market liberalisation has fundamentally changed state interventions in the supply of services and supportive infrastructure across a range of public services. While this trend has been relatively well documented, there has been a dearth of research into the changing nature of state interventions in migration and mobility. Indeed the increasing presence of migration intermediaries to service the many and varied needs of migrant workers, particularly skilled migrants, remains significantly under-researched both theoretically and empirically. In providing an analysis of the location, role and changing nature of migration intermediaries, we highlight the implications of commercially-driven governance structures. In particular we suggest that the shift from government to network governance has important implications for skilled migration including: inequities in access to information regarding the process of migration and labour market integration; and, greater dependence on (largely unregulated) private intermediaries. Accordingly, we present empirical examples of migration intermediaries to illustrate their role and the relationship with and implications of their exchange with migrants
Testosterone levels are negatively associated with childlessness in males, but positively related to offspring count in fathers
Variation in testosterone (T) is thought to affect the allocation of effort between reproductive and parenting strategies. Here, using a large sample of elderly American men (n = 754) and women (n = 669) we examined the relationship between T and self-reported parenthood, as well as the relationship between T and number of reported children. Results supported previous findings from the literature, showing that fathers had lower T levels than men who report no children. Furthermore, we found that among fathers T levels were positively associated with the number of children a man reports close to the end of his lifespan. Results were maintained when controlling for a number of relevant factors such as time of T sampling, participant age, educational attainment, BMI, marital status and reported number of sex partners. In contrast, T was not associated with either motherhood or the number of children women had, suggesting that, at least in this sample, T does not influence the allocation of effort between reproductive and parenting strategies among women. Findings from this study contribute to the growing body of literature suggesting that, among men, pair bonding and paternal care are associated with lower T levels, while searching and acquiring sex partners is associated with higher T levels.27 Jun 2013: Pollet TV, Cobey KD, van der Meij L (2013) Correction: Testosterone Levels Are Negatively Associated with Childlessness in Males, but Positively Related to Offspring Count in Fathers. PLoS ONE 8(6): 10.1371/annotation/bccccb7e-48a7-4594-b3e6-ce8c9d2489a2
Beyond the ‘Migrant Network’? Exploring assistance received in the migration of brazilians to Portugal and the Netherlands
This paper explores the tenability of three important critiques to the ‘migrant
network’ approach in migration studies: (1) the narrow focus on kin and community
members, which connect prospective migrants in origin countries with immigrants in
the destination areas, failing to take due account of sources of assistance beyond the
‘migrant network’ like institutional or online sources; (2) that it is misleading to assume
a general pattern in the role of migrant networks in migration, regardless of contexts of
arrival or departure, including the scale and history of migration or the immigration
regime; and (3) that ‘migrant networks’ are not equally relevant to all migrants, and that
important differences may exist between labour migrants and other types of migrants
like family migrants or students. Drawing on survey data on the migration of Brazilians
to Portugal and the Netherlands we find support for these critiques but also reaffirm the
relevance of ‘migrant networks’.info:eu-repo/semantics/publishedVersio
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