On non-gaussianities in single-field inflation

We study the impact of higher dimension operators in the inflaton Lagrangian on the non-gaussianity of the scalar spectrum. These terms can strongly enhance the effect without spoiling slow-roll, though it is difficult to exceed f_NL ~ 1, because the scale which suppresses the operators cannot be too low, if we want the effective field theory description to make sense. In particular we explicitly calculate the 3-point function given by an higher derivative interaction of the form (\nabla\phi)^4, which is expected to give the most important contribution. The angular dependence of the result turns out to be quite different from the minimal case without higher dimension operators.Comment: 10 page

“Accessibility, Usability & Embeddedness”: Social Capital and the Status Attainment Process for Men in the Netherlands

This study addresses the status attainment process and the associated mobility between generations for men in Dutch society in 2000. It does so by integrating the social resources theory (Lai et al., 1998) with the classic status attainment model of Blau and Duncan (1967). We try to answer the research question; How does social capital contribute to the transfer of status from father to son in The Netherlands? To answer this research question, we use the Dutch Social Networks Survey. The most important result, based on a labor force sample of 471 respondents aged between 18 and 65, was that prestige as social capital is inherited and has a significant effect on one's status. However, when including social capital in the status attainment model, education is the most important predictor of one's status. Furthermore, the higher the status of the person who helps the ego to get a job, the higher the status of the attained job. Contradictory to the theory, we found no evidence of tie strength in the status attainment process

Cuadernos de pedagogía

El artículo forma parte de un dossier titulado: Educar con la naturaleza.Se describe la experiencia realizada en la escuela infantil J. M. Cèspedes de San Adrià de Bèsos (Barcelona). El proyecto consiste en la conversión del patio del centro en un jardín. Se describe el proceso de elaboración del proyecto y las actividades para el desarrollo del mismo con la participación de los niños, familias y otros miembros de la comunidad.Madrid (Comunidad Autónoma). Subdirección General de Formación del Profesorado. CRIF Las Acacias; Calle General Ricardos 179; 28025 Madrid; Tel. +34915250893; Fax +34914660991; [email protected]