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Interstitial transition atom impurities in silicon: electronic structure and lattice relaxation

Both the electronic structure and the `breathing-mode' relaxation for tetrahedral interstitial 3D transition atom impurities in silicon are studied in the local-density approximation. The calculations show that although the interstitial 3d impurities constitute a very large perturbation locally, they interact rather weakly with the surrounding crystal in the sense that they perturb the spatial dis

Family Structure and Declining Sex Ratios in Rural India

This article builds on the recognizition that the declining child sex ratios in rural India are a result of an ongoing process of social change. It looks at areas both in the north and in the south which have shown significant decline in the child sex ratio between 1991 and 2001. In order to understand why the lives of female children are at risk and why there is an increasing discrimination again

Acoustic scattering by a soft elliptic disk

Scattering from an acoustically soft elliptic disk is treated by means of the null field approach. It is shown that in the disk limit of a general ellipsoid the relevant matrix elements have a well-defined limit, and that the formulation is attractive for numerical calculations. In a separate section the low frequency expressions of the total cross section and the far field amplitude are also deri

Peritoneal Angiogenesis in Response to Dialysis Fluid.

In patients on peritoneal dialysis (PD) ultrafiltration failure (UFF) often develops after 3 or 4 years of treatment. Increased angiogenesis, leading to an increase in small solute transport, is a key feature of UFF. Among the pathophysiological mechanisms responsible for an increased angiogenesis, peritonitis, or just 'low-grade inflammation', such as in the uremic condition per se seem to be of

Deaf education policy as language policy: A comparative analysis of Sweden and the United States

The present study offers a cross-national, comparative analysis of Swedish and US deaf education policies to examine the ways in which status planning and acquisition planning for sign languages are taken up. Major policy documents were selected from each polity, reflecting key national legislative policies as well as the primary texts that guide educational implementation: for Sweden, the Ordinan

A socio-material ecology of the distributed self

When distributed to different artefacts, the self appears in a multitude of shapes, characterized not only by its materiality but also by the necessity to preserve at least an illusion of a core self. The experience of a continuous evolution of these overlapping “selves”, many of which are materialized together with others’ overlapping selves, cannot be captured by traditional design approaches, n