Individual differences in puberty onset in girls: Bayesian estimation of heritabilities and genetic correlations

We report heritabilities for individual differences in female pubertal development at the age of 12. Tanner data on breast and pubic hair development in girls and data on menarche were obtained from a total of 184 pairs of monozygotic and dizygotic twins. Genetic correlations were estimated to determine to what extent the same genes are involved in different aspects of physical development in puberty. A Bayesian estimation approach was taken, using Markovchain Monte Carlo simulation to estimate model parameters. All three phenotypes were to a significant extent heritable and showed high genetic correlations, suggesting that a common set of genes is involved in the timing of puberty in general. However, gonadarche (menarche and breast development) and adrenarche (pubic hair) are affected by different environmental factors, which does not support the three phenotypes to be regarded as indicators of a unitary physiological factor. © 2006 Springer Science+Business Media, Inc

Global citizenship and the notion of moral emotions

In the past, little attention has been paid to the socio-psychological dimension of the phenomenon of severe poverty in Africa. Despite the institutional nature of the global economic order, including policies of the European Union, the World Trade Organisation, and the International Monetary Fund, it is people who design, support, and maintain this system, and individual constructions of the world and structural inequalities that reinforce one another. This also finds its expression in different ways, e.g. people " s social representations of severe poverty in Europe " s former colonies (Park, 2008, 2011). This article investigates, how we, members of the European middle class, construct ourselves as ethical beings in the context of African poverty: What is the link between our social representations, identity construction and (in)action with regard to severe poverty in Africa? What are the discursive mechanisms we apply in the construction of an ethical self and what is the notion of the " African Other " ? In a nutshell: What do our social representations make us do

The Nature Conservancy's Conservation Accomplishments at Risk: Abating the Threat of Invasive Species

Whether in the coral reefs of the South Pacific, in native grasslands of the western U.S., in Brazil's Pantanal wetlands, in the hardwood hammocks of the Florida Keys, in coastal and tropical forests in the Caribbean, or across Mexican deserts, invasive species have been identified as one of the most serious and pervasive threats across all of The Nature Conservancy's Conservation Areas, threatening all our conservation accomplishments to date. Invasive species have been identified as one of the top two threats to global biodiversity, and this threat has economic consequences -estimated at $137 billion annually in the U.S. alone. In the long term, conservation success will depend greatly on the ability to prevent new invasions, and to manage "invaded" native systems for maximum benefit to native biodiversity and intact, functioning ecosystems. The prevention and early detection of new invasive species is not only important to natural systems, but can also save millions of dollars in control measures for agricultural systems. The Conservancy is actively promoting the implementation and scientific improvement of new prevention programs and methods, through capacity building and through the influence on policy. The steps for a comprehensive strategy include assessment and risk analysis, prevention, early detection, rapid response and eradication, control and management, restoration, and public education and awareness. The foundation for all these steps is science but much more is needed and our ability to incorporate new information into management decisions in a timely fashion continues to be limited

Effectiveness of interventions adopting a whole school approach to enhancing social and emotional development: a meta-analysis

This article presents findings from a meta-analysis which sought to determine the effectiveness of interventions adopting a whole school approach to enhancing children and young people’s social and emotional development. Whole school interventions were included if they involved a coordinated set of activities across curriculum teaching, school ethos and environment, and family and community partnerships. A total of 45 studies (30 interventions) involving 496,299 participants were included in the analysis. Post-intervention outcomes demonstrated significant but small improvements in participants’ social and emotional adjustment (d = 0.220), behavioural adjustment (d = 0.134), and internalising symptoms (d = 0.109). Interventions were not shown to impact on academic achievement. Origin of study and the inclusion of a community component as part of a whole school approach were found to be significant moderators for social and emotional outcomes. Further research is required to determine the active ingredients of whole school interventions that we can better understand the components necessary to achieve successful outcomes

Structure of ceramic surfaces modified by ion-beam techniques

A wide variety of structures are produced by ion implantation in ceramics. Random (substitutional and interstitial site occupancy) solid solutions with concentrations of solute that exceed the solubility limit can be produced in Al/sub 2/O/sub 3/. The changes that occur during annealing are complex and sometimes unpredictable. Silicon carbide becomes amorphous in a manner analogous to Si for ion fluences that produce more than 0.2 dpa damage. Light (N) and heavy (Cr) ions produce similar results if the fluence is scaled to damage energy deposited. Because of mass differences in the ions, two damage regions are developed in TiB/sub 2/. The structure remains crystalline to very high damage levels. These structural alterations cause changes in the surface mechanical properties. Since virtually any chemical species can be implanted, one can independently control structural damage and chemical effects. When coupled with selective annealing, this technique has the potential for producing a wide range of surface structures and properties. 8 figures